git.sesse.net Git - ffmpeg/blob - fftools/ffplay.c

   1 /*
   2  * Copyright (c) 2003 Fabrice Bellard
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /**
  22  * @file
  23  * simple media player based on the FFmpeg libraries
  24  */
  25
  26 #include "config.h"
  27 #include <inttypes.h>
  28 #include <math.h>
  29 #include <limits.h>
  30 #include <signal.h>
  31 #include <stdint.h>
  32
  33 #include "libavutil/avstring.h"
  34 #include "libavutil/eval.h"
  35 #include "libavutil/mathematics.h"
  36 #include "libavutil/pixdesc.h"
  37 #include "libavutil/imgutils.h"
  38 #include "libavutil/dict.h"
  39 #include "libavutil/parseutils.h"
  40 #include "libavutil/samplefmt.h"
  41 #include "libavutil/avassert.h"
  42 #include "libavutil/time.h"
  43 #include "libavformat/avformat.h"
  44 #include "libavdevice/avdevice.h"
  45 #include "libswscale/swscale.h"
  46 #include "libavutil/opt.h"
  47 #include "libavcodec/avfft.h"
  48 #include "libswresample/swresample.h"
  49
  50 #if CONFIG_AVFILTER
  51 # include "libavfilter/avfilter.h"
  52 # include "libavfilter/buffersink.h"
  53 # include "libavfilter/buffersrc.h"
  54 #endif
  55
  56 #include <SDL.h>
  57 #include <SDL_thread.h>
  58
  59 #include "cmdutils.h"
  60
  61 #include <assert.h>
  62
  63 const char program_name[] = "ffplay";
  64 const int program_birth_year = 2003;
  65
  66 #define MAX_QUEUE_SIZE (15 * 1024 * 1024)
  67 #define MIN_FRAMES 25
  68 #define EXTERNAL_CLOCK_MIN_FRAMES 2
  69 #define EXTERNAL_CLOCK_MAX_FRAMES 10
  70
  71 /* Minimum SDL audio buffer size, in samples. */
  72 #define SDL_AUDIO_MIN_BUFFER_SIZE 512
  73 /* Calculate actual buffer size keeping in mind not cause too frequent audio callbacks */
  74 #define SDL_AUDIO_MAX_CALLBACKS_PER_SEC 30
  75
  76 /* Step size for volume control in dB */
  77 #define SDL_VOLUME_STEP (0.75)
  78
  79 /* no AV sync correction is done if below the minimum AV sync threshold */
  80 #define AV_SYNC_THRESHOLD_MIN 0.04
  81 /* AV sync correction is done if above the maximum AV sync threshold */
  82 #define AV_SYNC_THRESHOLD_MAX 0.1
  83 /* If a frame duration is longer than this, it will not be duplicated to compensate AV sync */
  84 #define AV_SYNC_FRAMEDUP_THRESHOLD 0.1
  85 /* no AV correction is done if too big error */
  86 #define AV_NOSYNC_THRESHOLD 10.0
  87
  88 /* maximum audio speed change to get correct sync */
  89 #define SAMPLE_CORRECTION_PERCENT_MAX 10
  90
  91 /* external clock speed adjustment constants for realtime sources based on buffer fullness */
  92 #define EXTERNAL_CLOCK_SPEED_MIN  0.900
  93 #define EXTERNAL_CLOCK_SPEED_MAX  1.010
  94 #define EXTERNAL_CLOCK_SPEED_STEP 0.001
  95
  96 /* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
  97 #define AUDIO_DIFF_AVG_NB   20
  98
  99 /* polls for possible required screen refresh at least this often, should be less than 1/fps */
 100 #define REFRESH_RATE 0.01
 101
 102 /* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
 103 /* TODO: We assume that a decoded and resampled frame fits into this buffer */
 104 #define SAMPLE_ARRAY_SIZE (8 * 65536)
 105
 106 #define CURSOR_HIDE_DELAY 1000000
 107
 108 #define USE_ONEPASS_SUBTITLE_RENDER 1
 109
 110 static unsigned sws_flags = SWS_BICUBIC;
 111
 112 typedef struct MyAVPacketList {
 113     AVPacket pkt;
 114     struct MyAVPacketList *next;
 115     int serial;
 116 } MyAVPacketList;
 117
 118 typedef struct PacketQueue {
 119     MyAVPacketList *first_pkt, *last_pkt;
 120     int nb_packets;
 121     int size;
 122     int64_t duration;
 123     int abort_request;
 124     int serial;
 125     SDL_mutex *mutex;
 126     SDL_cond *cond;
 127 } PacketQueue;
 128
 129 #define VIDEO_PICTURE_QUEUE_SIZE 3
 130 #define SUBPICTURE_QUEUE_SIZE 16
 131 #define SAMPLE_QUEUE_SIZE 9
 132 #define FRAME_QUEUE_SIZE FFMAX(SAMPLE_QUEUE_SIZE, FFMAX(VIDEO_PICTURE_QUEUE_SIZE, SUBPICTURE_QUEUE_SIZE))
 133
 134 typedef struct AudioParams {
 135     int freq;
 136     int channels;
 137     int64_t channel_layout;
 138     enum AVSampleFormat fmt;
 139     int frame_size;
 140     int bytes_per_sec;
 141 } AudioParams;
 142
 143 typedef struct Clock {
 144     double pts;           /* clock base */
 145     double pts_drift;     /* clock base minus time at which we updated the clock */
 146     double last_updated;
 147     double speed;
 148     int serial;           /* clock is based on a packet with this serial */
 149     int paused;
 150     int *queue_serial;    /* pointer to the current packet queue serial, used for obsolete clock detection */
 151 } Clock;
 152
 153 /* Common struct for handling all types of decoded data and allocated render buffers. */
 154 typedef struct Frame {
 155     AVFrame *frame;
 156     AVSubtitle sub;
 157     int serial;
 158     double pts;           /* presentation timestamp for the frame */
 159     double duration;      /* estimated duration of the frame */
 160     int64_t pos;          /* byte position of the frame in the input file */
 161     int width;
 162     int height;
 163     int format;
 164     AVRational sar;
 165     int uploaded;
 166     int flip_v;
 167 } Frame;
 168
 169 typedef struct FrameQueue {
 170     Frame queue[FRAME_QUEUE_SIZE];
 171     int rindex;
 172     int windex;
 173     int size;
 174     int max_size;
 175     int keep_last;
 176     int rindex_shown;
 177     SDL_mutex *mutex;
 178     SDL_cond *cond;
 179     PacketQueue *pktq;
 180 } FrameQueue;
 181
 182 enum {
 183     AV_SYNC_AUDIO_MASTER, /* default choice */
 184     AV_SYNC_VIDEO_MASTER,
 185     AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */
 186 };
 187
 188 typedef struct Decoder {
 189     AVPacket pkt;
 190     PacketQueue *queue;
 191     AVCodecContext *avctx;
 192     int pkt_serial;
 193     int finished;
 194     int packet_pending;
 195     SDL_cond *empty_queue_cond;
 196     int64_t start_pts;
 197     AVRational start_pts_tb;
 198     int64_t next_pts;
 199     AVRational next_pts_tb;
 200     SDL_Thread *decoder_tid;
 201 } Decoder;
 202
 203 typedef struct VideoState {
 204     SDL_Thread *read_tid;
 205     AVInputFormat *iformat;
 206     int abort_request;
 207     int force_refresh;
 208     int paused;
 209     int last_paused;
 210     int queue_attachments_req;
 211     int seek_req;
 212     int seek_flags;
 213     int64_t seek_pos;
 214     int64_t seek_rel;
 215     int read_pause_return;
 216     AVFormatContext *ic;
 217     int realtime;
 218
 219     Clock audclk;
 220     Clock vidclk;
 221     Clock extclk;
 222
 223     FrameQueue pictq;
 224     FrameQueue subpq;
 225     FrameQueue sampq;
 226
 227     Decoder auddec;
 228     Decoder viddec;
 229     Decoder subdec;
 230
 231     int audio_stream;
 232
 233     int av_sync_type;
 234
 235     double audio_clock;
 236     int audio_clock_serial;
 237     double audio_diff_cum; /* used for AV difference average computation */
 238     double audio_diff_avg_coef;
 239     double audio_diff_threshold;
 240     int audio_diff_avg_count;
 241     AVStream *audio_st;
 242     PacketQueue audioq;
 243     int audio_hw_buf_size;
 244     uint8_t *audio_buf;
 245     uint8_t *audio_buf1;
 246     unsigned int audio_buf_size; /* in bytes */
 247     unsigned int audio_buf1_size;
 248     int audio_buf_index; /* in bytes */
 249     int audio_write_buf_size;
 250     int audio_volume;
 251     int muted;
 252     struct AudioParams audio_src;
 253 #if CONFIG_AVFILTER
 254     struct AudioParams audio_filter_src;
 255 #endif
 256     struct AudioParams audio_tgt;
 257     struct SwrContext *swr_ctx;
 258     int frame_drops_early;
 259     int frame_drops_late;
 260
 261     enum ShowMode {
 262         SHOW_MODE_NONE = -1, SHOW_MODE_VIDEO = 0, SHOW_MODE_WAVES, SHOW_MODE_RDFT, SHOW_MODE_NB
 263     } show_mode;
 264     int16_t sample_array[SAMPLE_ARRAY_SIZE];
 265     int sample_array_index;
 266     int last_i_start;
 267     RDFTContext *rdft;
 268     int rdft_bits;
 269     FFTSample *rdft_data;
 270     int xpos;
 271     double last_vis_time;
 272     SDL_Texture *vis_texture;
 273     SDL_Texture *sub_texture;
 274     SDL_Texture *vid_texture;
 275
 276     int subtitle_stream;
 277     AVStream *subtitle_st;
 278     PacketQueue subtitleq;
 279
 280     double frame_timer;
 281     double frame_last_returned_time;
 282     double frame_last_filter_delay;
 283     int video_stream;
 284     AVStream *video_st;
 285     PacketQueue videoq;
 286     double max_frame_duration;      // maximum duration of a frame - above this, we consider the jump a timestamp discontinuity
 287     struct SwsContext *img_convert_ctx;
 288     struct SwsContext *sub_convert_ctx;
 289     int eof;
 290
 291     char *filename;
 292     int width, height, xleft, ytop;
 293     int step;
 294
 295 #if CONFIG_AVFILTER
 296     int vfilter_idx;
 297     AVFilterContext *in_video_filter;   // the first filter in the video chain
 298     AVFilterContext *out_video_filter;  // the last filter in the video chain
 299     AVFilterContext *in_audio_filter;   // the first filter in the audio chain
 300     AVFilterContext *out_audio_filter;  // the last filter in the audio chain
 301     AVFilterGraph *agraph;              // audio filter graph
 302 #endif
 303
 304     int last_video_stream, last_audio_stream, last_subtitle_stream;
 305
 306     SDL_cond *continue_read_thread;
 307 } VideoState;
 308
 309 /* options specified by the user */
 310 static AVInputFormat *file_iformat;
 311 static const char *input_filename;
 312 static const char *window_title;
 313 static int default_width  = 640;
 314 static int default_height = 480;
 315 static int screen_width  = 0;
 316 static int screen_height = 0;
 317 static int screen_left = SDL_WINDOWPOS_CENTERED;
 318 static int screen_top = SDL_WINDOWPOS_CENTERED;
 319 static int audio_disable;
 320 static int video_disable;
 321 static int subtitle_disable;
 322 static const char* wanted_stream_spec[AVMEDIA_TYPE_NB] = {0};
 323 static int seek_by_bytes = -1;
 324 static float seek_interval = 10;
 325 static int display_disable;
 326 static int borderless;
 327 static int startup_volume = 100;
 328 static int show_status = 1;
 329 static int av_sync_type = AV_SYNC_AUDIO_MASTER;
 330 static int64_t start_time = AV_NOPTS_VALUE;
 331 static int64_t duration = AV_NOPTS_VALUE;
 332 static int fast = 0;
 333 static int genpts = 0;
 334 static int lowres = 0;
 335 static int decoder_reorder_pts = -1;
 336 static int autoexit;
 337 static int exit_on_keydown;
 338 static int exit_on_mousedown;
 339 static int loop = 1;
 340 static int framedrop = -1;
 341 static int infinite_buffer = -1;
 342 static enum ShowMode show_mode = SHOW_MODE_NONE;
 343 static const char *audio_codec_name;
 344 static const char *subtitle_codec_name;
 345 static const char *video_codec_name;
 346 double rdftspeed = 0.02;
 347 static int64_t cursor_last_shown;
 348 static int cursor_hidden = 0;
 349 #if CONFIG_AVFILTER
 350 static const char **vfilters_list = NULL;
 351 static int nb_vfilters = 0;
 352 static char *afilters = NULL;
 353 #endif
 354 static int autorotate = 1;
 355 static int find_stream_info = 1;
 356
 357 /* current context */
 358 static int is_full_screen;
 359 static int64_t audio_callback_time;
 360
 361 static AVPacket flush_pkt;
 362
 363 #define FF_QUIT_EVENT    (SDL_USEREVENT + 2)
 364
 365 static SDL_Window *window;
 366 static SDL_Renderer *renderer;
 367 static SDL_RendererInfo renderer_info = {0};
 368 static SDL_AudioDeviceID audio_dev;
 369
 370 static const struct TextureFormatEntry {
 371     enum AVPixelFormat format;
 372     int texture_fmt;
 373 } sdl_texture_format_map[] = {
 374     { AV_PIX_FMT_RGB8,           SDL_PIXELFORMAT_RGB332 },
 375     { AV_PIX_FMT_RGB444,         SDL_PIXELFORMAT_RGB444 },
 376     { AV_PIX_FMT_RGB555,         SDL_PIXELFORMAT_RGB555 },
 377     { AV_PIX_FMT_BGR555,         SDL_PIXELFORMAT_BGR555 },
 378     { AV_PIX_FMT_RGB565,         SDL_PIXELFORMAT_RGB565 },
 379     { AV_PIX_FMT_BGR565,         SDL_PIXELFORMAT_BGR565 },
 380     { AV_PIX_FMT_RGB24,          SDL_PIXELFORMAT_RGB24 },
 381     { AV_PIX_FMT_BGR24,          SDL_PIXELFORMAT_BGR24 },
 382     { AV_PIX_FMT_0RGB32,         SDL_PIXELFORMAT_RGB888 },
 383     { AV_PIX_FMT_0BGR32,         SDL_PIXELFORMAT_BGR888 },
 384     { AV_PIX_FMT_NE(RGB0, 0BGR), SDL_PIXELFORMAT_RGBX8888 },
 385     { AV_PIX_FMT_NE(BGR0, 0RGB), SDL_PIXELFORMAT_BGRX8888 },
 386     { AV_PIX_FMT_RGB32,          SDL_PIXELFORMAT_ARGB8888 },
 387     { AV_PIX_FMT_RGB32_1,        SDL_PIXELFORMAT_RGBA8888 },
 388     { AV_PIX_FMT_BGR32,          SDL_PIXELFORMAT_ABGR8888 },
 389     { AV_PIX_FMT_BGR32_1,        SDL_PIXELFORMAT_BGRA8888 },
 390     { AV_PIX_FMT_YUV420P,        SDL_PIXELFORMAT_IYUV },
 391     { AV_PIX_FMT_YUYV422,        SDL_PIXELFORMAT_YUY2 },
 392     { AV_PIX_FMT_UYVY422,        SDL_PIXELFORMAT_UYVY },
 393     { AV_PIX_FMT_NONE,           SDL_PIXELFORMAT_UNKNOWN },
 394 };
 395
 396 #if CONFIG_AVFILTER
 397 static int opt_add_vfilter(void *optctx, const char *opt, const char *arg)
 398 {
 399     GROW_ARRAY(vfilters_list, nb_vfilters);
 400     vfilters_list[nb_vfilters - 1] = arg;
 401     return 0;
 402 }
 403 #endif
 404
 405 static inline
 406 int cmp_audio_fmts(enum AVSampleFormat fmt1, int64_t channel_count1,
 407                    enum AVSampleFormat fmt2, int64_t channel_count2)
 408 {
 409     /* If channel count == 1, planar and non-planar formats are the same */
 410     if (channel_count1 == 1 && channel_count2 == 1)
 411         return av_get_packed_sample_fmt(fmt1) != av_get_packed_sample_fmt(fmt2);
 412     else
 413         return channel_count1 != channel_count2 || fmt1 != fmt2;
 414 }
 415
 416 static inline
 417 int64_t get_valid_channel_layout(int64_t channel_layout, int channels)
 418 {
 419     if (channel_layout && av_get_channel_layout_nb_channels(channel_layout) == channels)
 420         return channel_layout;
 421     else
 422         return 0;
 423 }
 424
 425 static int packet_queue_put_private(PacketQueue *q, AVPacket *pkt)
 426 {
 427     MyAVPacketList *pkt1;
 428
 429     if (q->abort_request)
 430        return -1;
 431
 432     pkt1 = av_malloc(sizeof(MyAVPacketList));
 433     if (!pkt1)
 434         return -1;
 435     pkt1->pkt = *pkt;
 436     pkt1->next = NULL;
 437     if (pkt == &flush_pkt)
 438         q->serial++;
 439     pkt1->serial = q->serial;
 440
 441     if (!q->last_pkt)
 442         q->first_pkt = pkt1;
 443     else
 444         q->last_pkt->next = pkt1;
 445     q->last_pkt = pkt1;
 446     q->nb_packets++;
 447     q->size += pkt1->pkt.size + sizeof(*pkt1);
 448     q->duration += pkt1->pkt.duration;
 449     /* XXX: should duplicate packet data in DV case */
 450     SDL_CondSignal(q->cond);
 451     return 0;
 452 }
 453
 454 static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
 455 {
 456     int ret;
 457
 458     SDL_LockMutex(q->mutex);
 459     ret = packet_queue_put_private(q, pkt);
 460     SDL_UnlockMutex(q->mutex);
 461
 462     if (pkt != &flush_pkt && ret < 0)
 463         av_packet_unref(pkt);
 464
 465     return ret;
 466 }
 467
 468 static int packet_queue_put_nullpacket(PacketQueue *q, int stream_index)
 469 {
 470     AVPacket pkt1, *pkt = &pkt1;
 471     av_init_packet(pkt);
 472     pkt->data = NULL;
 473     pkt->size = 0;
 474     pkt->stream_index = stream_index;
 475     return packet_queue_put(q, pkt);
 476 }
 477
 478 /* packet queue handling */
 479 static int packet_queue_init(PacketQueue *q)
 480 {
 481     memset(q, 0, sizeof(PacketQueue));
 482     q->mutex = SDL_CreateMutex();
 483     if (!q->mutex) {
 484         av_log(NULL, AV_LOG_FATAL, "SDL_CreateMutex(): %s\n", SDL_GetError());
 485         return AVERROR(ENOMEM);
 486     }
 487     q->cond = SDL_CreateCond();
 488     if (!q->cond) {
 489         av_log(NULL, AV_LOG_FATAL, "SDL_CreateCond(): %s\n", SDL_GetError());
 490         return AVERROR(ENOMEM);
 491     }
 492     q->abort_request = 1;
 493     return 0;
 494 }
 495
 496 static void packet_queue_flush(PacketQueue *q)
 497 {
 498     MyAVPacketList *pkt, *pkt1;
 499
 500     SDL_LockMutex(q->mutex);
 501     for (pkt = q->first_pkt; pkt; pkt = pkt1) {
 502         pkt1 = pkt->next;
 503         av_packet_unref(&pkt->pkt);
 504         av_freep(&pkt);
 505     }
 506     q->last_pkt = NULL;
 507     q->first_pkt = NULL;
 508     q->nb_packets = 0;
 509     q->size = 0;
 510     q->duration = 0;
 511     SDL_UnlockMutex(q->mutex);
 512 }
 513
 514 static void packet_queue_destroy(PacketQueue *q)
 515 {
 516     packet_queue_flush(q);
 517     SDL_DestroyMutex(q->mutex);
 518     SDL_DestroyCond(q->cond);
 519 }
 520
 521 static void packet_queue_abort(PacketQueue *q)
 522 {
 523     SDL_LockMutex(q->mutex);
 524
 525     q->abort_request = 1;
 526
 527     SDL_CondSignal(q->cond);
 528
 529     SDL_UnlockMutex(q->mutex);
 530 }
 531
 532 static void packet_queue_start(PacketQueue *q)
 533 {
 534     SDL_LockMutex(q->mutex);
 535     q->abort_request = 0;
 536     packet_queue_put_private(q, &flush_pkt);
 537     SDL_UnlockMutex(q->mutex);
 538 }
 539
 540 /* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
 541 static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block, int *serial)
 542 {
 543     MyAVPacketList *pkt1;
 544     int ret;
 545
 546     SDL_LockMutex(q->mutex);
 547
 548     for (;;) {
 549         if (q->abort_request) {
 550             ret = -1;
 551             break;
 552         }
 553
 554         pkt1 = q->first_pkt;
 555         if (pkt1) {
 556             q->first_pkt = pkt1->next;
 557             if (!q->first_pkt)
 558                 q->last_pkt = NULL;
 559             q->nb_packets--;
 560             q->size -= pkt1->pkt.size + sizeof(*pkt1);
 561             q->duration -= pkt1->pkt.duration;
 562             *pkt = pkt1->pkt;
 563             if (serial)
 564                 *serial = pkt1->serial;
 565             av_free(pkt1);
 566             ret = 1;
 567             break;
 568         } else if (!block) {
 569             ret = 0;
 570             break;
 571         } else {
 572             SDL_CondWait(q->cond, q->mutex);
 573         }
 574     }
 575     SDL_UnlockMutex(q->mutex);
 576     return ret;
 577 }
 578
 579 static void decoder_init(Decoder *d, AVCodecContext *avctx, PacketQueue *queue, SDL_cond *empty_queue_cond) {
 580     memset(d, 0, sizeof(Decoder));
 581     d->avctx = avctx;
 582     d->queue = queue;
 583     d->empty_queue_cond = empty_queue_cond;
 584     d->start_pts = AV_NOPTS_VALUE;
 585     d->pkt_serial = -1;
 586 }
 587
 588 static int decoder_decode_frame(Decoder *d, AVFrame *frame, AVSubtitle *sub) {
 589     int ret = AVERROR(EAGAIN);
 590
 591     for (;;) {
 592         AVPacket pkt;
 593
 594         if (d->queue->serial == d->pkt_serial) {
 595             do {
 596                 if (d->queue->abort_request)
 597                     return -1;
 598
 599                 switch (d->avctx->codec_type) {
 600                     case AVMEDIA_TYPE_VIDEO:
 601                         ret = avcodec_receive_frame(d->avctx, frame);
 602                         if (ret >= 0) {
 603                             if (decoder_reorder_pts == -1) {
 604                                 frame->pts = frame->best_effort_timestamp;
 605                             } else if (!decoder_reorder_pts) {
 606                                 frame->pts = frame->pkt_dts;
 607                             }
 608                         }
 609                         break;
 610                     case AVMEDIA_TYPE_AUDIO:
 611                         ret = avcodec_receive_frame(d->avctx, frame);
 612                         if (ret >= 0) {
 613                             AVRational tb = (AVRational){1, frame->sample_rate};
 614                             if (frame->pts != AV_NOPTS_VALUE)
 615                                 frame->pts = av_rescale_q(frame->pts, d->avctx->pkt_timebase, tb);
 616                             else if (d->next_pts != AV_NOPTS_VALUE)
 617                                 frame->pts = av_rescale_q(d->next_pts, d->next_pts_tb, tb);
 618                             if (frame->pts != AV_NOPTS_VALUE) {
 619                                 d->next_pts = frame->pts + frame->nb_samples;
 620                                 d->next_pts_tb = tb;
 621                             }
 622                         }
 623                         break;
 624                 }
 625                 if (ret == AVERROR_EOF) {
 626                     d->finished = d->pkt_serial;
 627                     avcodec_flush_buffers(d->avctx);
 628                     return 0;
 629                 }
 630                 if (ret >= 0)
 631                     return 1;
 632             } while (ret != AVERROR(EAGAIN));
 633         }
 634
 635         do {
 636             if (d->queue->nb_packets == 0)
 637                 SDL_CondSignal(d->empty_queue_cond);
 638             if (d->packet_pending) {
 639                 av_packet_move_ref(&pkt, &d->pkt);
 640                 d->packet_pending = 0;
 641             } else {
 642                 if (packet_queue_get(d->queue, &pkt, 1, &d->pkt_serial) < 0)
 643                     return -1;
 644             }
 645         } while (d->queue->serial != d->pkt_serial);
 646
 647         if (pkt.data == flush_pkt.data) {
 648             avcodec_flush_buffers(d->avctx);
 649             d->finished = 0;
 650             d->next_pts = d->start_pts;
 651             d->next_pts_tb = d->start_pts_tb;
 652         } else {
 653             if (d->avctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
 654                 int got_frame = 0;
 655                 ret = avcodec_decode_subtitle2(d->avctx, sub, &got_frame, &pkt);
 656                 if (ret < 0) {
 657                     ret = AVERROR(EAGAIN);
 658                 } else {
 659                     if (got_frame && !pkt.data) {
 660                        d->packet_pending = 1;
 661                        av_packet_move_ref(&d->pkt, &pkt);
 662                     }
 663                     ret = got_frame ? 0 : (pkt.data ? AVERROR(EAGAIN) : AVERROR_EOF);
 664                 }
 665             } else {
 666                 if (avcodec_send_packet(d->avctx, &pkt) == AVERROR(EAGAIN)) {
 667                     av_log(d->avctx, AV_LOG_ERROR, "Receive_frame and send_packet both returned EAGAIN, which is an API violation.\n");
 668                     d->packet_pending = 1;
 669                     av_packet_move_ref(&d->pkt, &pkt);
 670                 }
 671             }
 672             av_packet_unref(&pkt);
 673         }
 674     }
 675 }
 676
 677 static void decoder_destroy(Decoder *d) {
 678     av_packet_unref(&d->pkt);
 679     avcodec_free_context(&d->avctx);
 680 }
 681
 682 static void frame_queue_unref_item(Frame *vp)
 683 {
 684     av_frame_unref(vp->frame);
 685     avsubtitle_free(&vp->sub);
 686 }
 687
 688 static int frame_queue_init(FrameQueue *f, PacketQueue *pktq, int max_size, int keep_last)
 689 {
 690     int i;
 691     memset(f, 0, sizeof(FrameQueue));
 692     if (!(f->mutex = SDL_CreateMutex())) {
 693         av_log(NULL, AV_LOG_FATAL, "SDL_CreateMutex(): %s\n", SDL_GetError());
 694         return AVERROR(ENOMEM);
 695     }
 696     if (!(f->cond = SDL_CreateCond())) {
 697         av_log(NULL, AV_LOG_FATAL, "SDL_CreateCond(): %s\n", SDL_GetError());
 698         return AVERROR(ENOMEM);
 699     }
 700     f->pktq = pktq;
 701     f->max_size = FFMIN(max_size, FRAME_QUEUE_SIZE);
 702     f->keep_last = !!keep_last;
 703     for (i = 0; i < f->max_size; i++)
 704         if (!(f->queue[i].frame = av_frame_alloc()))
 705             return AVERROR(ENOMEM);
 706     return 0;
 707 }
 708
 709 static void frame_queue_destory(FrameQueue *f)
 710 {
 711     int i;
 712     for (i = 0; i < f->max_size; i++) {
 713         Frame *vp = &f->queue[i];
 714         frame_queue_unref_item(vp);
 715         av_frame_free(&vp->frame);
 716     }
 717     SDL_DestroyMutex(f->mutex);
 718     SDL_DestroyCond(f->cond);
 719 }
 720
 721 static void frame_queue_signal(FrameQueue *f)
 722 {
 723     SDL_LockMutex(f->mutex);
 724     SDL_CondSignal(f->cond);
 725     SDL_UnlockMutex(f->mutex);
 726 }
 727
 728 static Frame *frame_queue_peek(FrameQueue *f)
 729 {
 730     return &f->queue[(f->rindex + f->rindex_shown) % f->max_size];
 731 }
 732
 733 static Frame *frame_queue_peek_next(FrameQueue *f)
 734 {
 735     return &f->queue[(f->rindex + f->rindex_shown + 1) % f->max_size];
 736 }
 737
 738 static Frame *frame_queue_peek_last(FrameQueue *f)
 739 {
 740     return &f->queue[f->rindex];
 741 }
 742
 743 static Frame *frame_queue_peek_writable(FrameQueue *f)
 744 {
 745     /* wait until we have space to put a new frame */
 746     SDL_LockMutex(f->mutex);
 747     while (f->size >= f->max_size &&
 748            !f->pktq->abort_request) {
 749         SDL_CondWait(f->cond, f->mutex);
 750     }
 751     SDL_UnlockMutex(f->mutex);
 752
 753     if (f->pktq->abort_request)
 754         return NULL;
 755
 756     return &f->queue[f->windex];
 757 }
 758
 759 static Frame *frame_queue_peek_readable(FrameQueue *f)
 760 {
 761     /* wait until we have a readable a new frame */
 762     SDL_LockMutex(f->mutex);
 763     while (f->size - f->rindex_shown <= 0 &&
 764            !f->pktq->abort_request) {
 765         SDL_CondWait(f->cond, f->mutex);
 766     }
 767     SDL_UnlockMutex(f->mutex);
 768
 769     if (f->pktq->abort_request)
 770         return NULL;
 771
 772     return &f->queue[(f->rindex + f->rindex_shown) % f->max_size];
 773 }
 774
 775 static void frame_queue_push(FrameQueue *f)
 776 {
 777     if (++f->windex == f->max_size)
 778         f->windex = 0;
 779     SDL_LockMutex(f->mutex);
 780     f->size++;
 781     SDL_CondSignal(f->cond);
 782     SDL_UnlockMutex(f->mutex);
 783 }
 784
 785 static void frame_queue_next(FrameQueue *f)
 786 {
 787     if (f->keep_last && !f->rindex_shown) {
 788         f->rindex_shown = 1;
 789         return;
 790     }
 791     frame_queue_unref_item(&f->queue[f->rindex]);
 792     if (++f->rindex == f->max_size)
 793         f->rindex = 0;
 794     SDL_LockMutex(f->mutex);
 795     f->size--;
 796     SDL_CondSignal(f->cond);
 797     SDL_UnlockMutex(f->mutex);
 798 }
 799
 800 /* return the number of undisplayed frames in the queue */
 801 static int frame_queue_nb_remaining(FrameQueue *f)
 802 {
 803     return f->size - f->rindex_shown;
 804 }
 805
 806 /* return last shown position */
 807 static int64_t frame_queue_last_pos(FrameQueue *f)
 808 {
 809     Frame *fp = &f->queue[f->rindex];
 810     if (f->rindex_shown && fp->serial == f->pktq->serial)
 811         return fp->pos;
 812     else
 813         return -1;
 814 }
 815
 816 static void decoder_abort(Decoder *d, FrameQueue *fq)
 817 {
 818     packet_queue_abort(d->queue);
 819     frame_queue_signal(fq);
 820     SDL_WaitThread(d->decoder_tid, NULL);
 821     d->decoder_tid = NULL;
 822     packet_queue_flush(d->queue);
 823 }
 824
 825 static inline void fill_rectangle(int x, int y, int w, int h)
 826 {
 827     SDL_Rect rect;
 828     rect.x = x;
 829     rect.y = y;
 830     rect.w = w;
 831     rect.h = h;
 832     if (w && h)
 833         SDL_RenderFillRect(renderer, &rect);
 834 }
 835
 836 static int realloc_texture(SDL_Texture **texture, Uint32 new_format, int new_width, int new_height, SDL_BlendMode blendmode, int init_texture)
 837 {
 838     Uint32 format;
 839     int access, w, h;
 840     if (!*texture || SDL_QueryTexture(*texture, &format, &access, &w, &h) < 0 || new_width != w || new_height != h || new_format != format) {
 841         void *pixels;
 842         int pitch;
 843         if (*texture)
 844             SDL_DestroyTexture(*texture);
 845         if (!(*texture = SDL_CreateTexture(renderer, new_format, SDL_TEXTUREACCESS_STREAMING, new_width, new_height)))
 846             return -1;
 847         if (SDL_SetTextureBlendMode(*texture, blendmode) < 0)
 848             return -1;
 849         if (init_texture) {
 850             if (SDL_LockTexture(*texture, NULL, &pixels, &pitch) < 0)
 851                 return -1;
 852             memset(pixels, 0, pitch * new_height);
 853             SDL_UnlockTexture(*texture);
 854         }
 855         av_log(NULL, AV_LOG_VERBOSE, "Created %dx%d texture with %s.\n", new_width, new_height, SDL_GetPixelFormatName(new_format));
 856     }
 857     return 0;
 858 }
 859
 860 static void calculate_display_rect(SDL_Rect *rect,
 861                                    int scr_xleft, int scr_ytop, int scr_width, int scr_height,
 862                                    int pic_width, int pic_height, AVRational pic_sar)
 863 {
 864     AVRational aspect_ratio = pic_sar;
 865     int64_t width, height, x, y;
 866
 867     if (av_cmp_q(aspect_ratio, av_make_q(0, 1)) <= 0)
 868         aspect_ratio = av_make_q(1, 1);
 869
 870     aspect_ratio = av_mul_q(aspect_ratio, av_make_q(pic_width, pic_height));
 871
 872     /* XXX: we suppose the screen has a 1.0 pixel ratio */
 873     height = scr_height;
 874     width = av_rescale(height, aspect_ratio.num, aspect_ratio.den) & ~1;
 875     if (width > scr_width) {
 876         width = scr_width;
 877         height = av_rescale(width, aspect_ratio.den, aspect_ratio.num) & ~1;
 878     }
 879     x = (scr_width - width) / 2;
 880     y = (scr_height - height) / 2;
 881     rect->x = scr_xleft + x;
 882     rect->y = scr_ytop  + y;
 883     rect->w = FFMAX((int)width,  1);
 884     rect->h = FFMAX((int)height, 1);
 885 }
 886
 887 static void get_sdl_pix_fmt_and_blendmode(int format, Uint32 *sdl_pix_fmt, SDL_BlendMode *sdl_blendmode)
 888 {
 889     int i;
 890     *sdl_blendmode = SDL_BLENDMODE_NONE;
 891     *sdl_pix_fmt = SDL_PIXELFORMAT_UNKNOWN;
 892     if (format == AV_PIX_FMT_RGB32   ||
 893         format == AV_PIX_FMT_RGB32_1 ||
 894         format == AV_PIX_FMT_BGR32   ||
 895         format == AV_PIX_FMT_BGR32_1)
 896         *sdl_blendmode = SDL_BLENDMODE_BLEND;
 897     for (i = 0; i < FF_ARRAY_ELEMS(sdl_texture_format_map) - 1; i++) {
 898         if (format == sdl_texture_format_map[i].format) {
 899             *sdl_pix_fmt = sdl_texture_format_map[i].texture_fmt;
 900             return;
 901         }
 902     }
 903 }
 904
 905 static int upload_texture(SDL_Texture **tex, AVFrame *frame, struct SwsContext **img_convert_ctx) {
 906     int ret = 0;
 907     Uint32 sdl_pix_fmt;
 908     SDL_BlendMode sdl_blendmode;
 909     get_sdl_pix_fmt_and_blendmode(frame->format, &sdl_pix_fmt, &sdl_blendmode);
 910     if (realloc_texture(tex, sdl_pix_fmt == SDL_PIXELFORMAT_UNKNOWN ? SDL_PIXELFORMAT_ARGB8888 : sdl_pix_fmt, frame->width, frame->height, sdl_blendmode, 0) < 0)
 911         return -1;
 912     switch (sdl_pix_fmt) {
 913         case SDL_PIXELFORMAT_UNKNOWN:
 914             /* This should only happen if we are not using avfilter... */
 915             *img_convert_ctx = sws_getCachedContext(*img_convert_ctx,
 916                 frame->width, frame->height, frame->format, frame->width, frame->height,
 917                 AV_PIX_FMT_BGRA, sws_flags, NULL, NULL, NULL);
 918             if (*img_convert_ctx != NULL) {
 919                 uint8_t *pixels[4];
 920                 int pitch[4];
 921                 if (!SDL_LockTexture(*tex, NULL, (void **)pixels, pitch)) {
 922                     sws_scale(*img_convert_ctx, (const uint8_t * const *)frame->data, frame->linesize,
 923                               0, frame->height, pixels, pitch);
 924                     SDL_UnlockTexture(*tex);
 925                 }
 926             } else {
 927                 av_log(NULL, AV_LOG_FATAL, "Cannot initialize the conversion context\n");
 928                 ret = -1;
 929             }
 930             break;
 931         case SDL_PIXELFORMAT_IYUV:
 932             if (frame->linesize[0] > 0 && frame->linesize[1] > 0 && frame->linesize[2] > 0) {
 933                 ret = SDL_UpdateYUVTexture(*tex, NULL, frame->data[0], frame->linesize[0],
 934                                                        frame->data[1], frame->linesize[1],
 935                                                        frame->data[2], frame->linesize[2]);
 936             } else if (frame->linesize[0] < 0 && frame->linesize[1] < 0 && frame->linesize[2] < 0) {
 937                 ret = SDL_UpdateYUVTexture(*tex, NULL, frame->data[0] + frame->linesize[0] * (frame->height                    - 1), -frame->linesize[0],
 938                                                        frame->data[1] + frame->linesize[1] * (AV_CEIL_RSHIFT(frame->height, 1) - 1), -frame->linesize[1],
 939                                                        frame->data[2] + frame->linesize[2] * (AV_CEIL_RSHIFT(frame->height, 1) - 1), -frame->linesize[2]);
 940             } else {
 941                 av_log(NULL, AV_LOG_ERROR, "Mixed negative and positive linesizes are not supported.\n");
 942                 return -1;
 943             }
 944             break;
 945         default:
 946             if (frame->linesize[0] < 0) {
 947                 ret = SDL_UpdateTexture(*tex, NULL, frame->data[0] + frame->linesize[0] * (frame->height - 1), -frame->linesize[0]);
 948             } else {
 949                 ret = SDL_UpdateTexture(*tex, NULL, frame->data[0], frame->linesize[0]);
 950             }
 951             break;
 952     }
 953     return ret;
 954 }
 955
 956 static void set_sdl_yuv_conversion_mode(AVFrame *frame)
 957 {
 958 #if SDL_VERSION_ATLEAST(2,0,8)
 959     SDL_YUV_CONVERSION_MODE mode = SDL_YUV_CONVERSION_AUTOMATIC;
 960     if (frame && (frame->format == AV_PIX_FMT_YUV420P || frame->format == AV_PIX_FMT_YUYV422 || frame->format == AV_PIX_FMT_UYVY422)) {
 961         if (frame->color_range == AVCOL_RANGE_JPEG)
 962             mode = SDL_YUV_CONVERSION_JPEG;
 963         else if (frame->colorspace == AVCOL_SPC_BT709)
 964             mode = SDL_YUV_CONVERSION_BT709;
 965         else if (frame->colorspace == AVCOL_SPC_BT470BG || frame->colorspace == AVCOL_SPC_SMPTE170M || frame->colorspace == AVCOL_SPC_SMPTE240M)
 966             mode = SDL_YUV_CONVERSION_BT601;
 967     }
 968     SDL_SetYUVConversionMode(mode);
 969 #endif
 970 }
 971
 972 static void video_image_display(VideoState *is)
 973 {
 974     Frame *vp;
 975     Frame *sp = NULL;
 976     SDL_Rect rect;
 977
 978     vp = frame_queue_peek_last(&is->pictq);
 979     if (is->subtitle_st) {
 980         if (frame_queue_nb_remaining(&is->subpq) > 0) {
 981             sp = frame_queue_peek(&is->subpq);
 982
 983             if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000)) {
 984                 if (!sp->uploaded) {
 985                     uint8_t* pixels[4];
 986                     int pitch[4];
 987                     int i;
 988                     if (!sp->width || !sp->height) {
 989                         sp->width = vp->width;
 990                         sp->height = vp->height;
 991                     }
 992                     if (realloc_texture(&is->sub_texture, SDL_PIXELFORMAT_ARGB8888, sp->width, sp->height, SDL_BLENDMODE_BLEND, 1) < 0)
 993                         return;
 994
 995                     for (i = 0; i < sp->sub.num_rects; i++) {
 996                         AVSubtitleRect *sub_rect = sp->sub.rects[i];
 997
 998                         sub_rect->x = av_clip(sub_rect->x, 0, sp->width );
 999                         sub_rect->y = av_clip(sub_rect->y, 0, sp->height);
1000                         sub_rect->w = av_clip(sub_rect->w, 0, sp->width  - sub_rect->x);
1001                         sub_rect->h = av_clip(sub_rect->h, 0, sp->height - sub_rect->y);
1002
1003                         is->sub_convert_ctx = sws_getCachedContext(is->sub_convert_ctx,
1004                             sub_rect->w, sub_rect->h, AV_PIX_FMT_PAL8,
1005                             sub_rect->w, sub_rect->h, AV_PIX_FMT_BGRA,
1006                             0, NULL, NULL, NULL);
1007                         if (!is->sub_convert_ctx) {
1008                             av_log(NULL, AV_LOG_FATAL, "Cannot initialize the conversion context\n");
1009                             return;
1010                         }
1011                         if (!SDL_LockTexture(is->sub_texture, (SDL_Rect *)sub_rect, (void **)pixels, pitch)) {
1012                             sws_scale(is->sub_convert_ctx, (const uint8_t * const *)sub_rect->data, sub_rect->linesize,
1013                                       0, sub_rect->h, pixels, pitch);
1014                             SDL_UnlockTexture(is->sub_texture);
1015                         }
1016                     }
1017                     sp->uploaded = 1;
1018                 }
1019             } else
1020                 sp = NULL;
1021         }
1022     }
1023
1024     calculate_display_rect(&rect, is->xleft, is->ytop, is->width, is->height, vp->width, vp->height, vp->sar);
1025
1026     if (!vp->uploaded) {
1027         if (upload_texture(&is->vid_texture, vp->frame, &is->img_convert_ctx) < 0)
1028             return;
1029         vp->uploaded = 1;
1030         vp->flip_v = vp->frame->linesize[0] < 0;
1031     }
1032
1033     set_sdl_yuv_conversion_mode(vp->frame);
1034     SDL_RenderCopyEx(renderer, is->vid_texture, NULL, &rect, 0, NULL, vp->flip_v ? SDL_FLIP_VERTICAL : 0);
1035     set_sdl_yuv_conversion_mode(NULL);
1036     if (sp) {
1037 #if USE_ONEPASS_SUBTITLE_RENDER
1038         SDL_RenderCopy(renderer, is->sub_texture, NULL, &rect);
1039 #else
1040         int i;
1041         double xratio = (double)rect.w / (double)sp->width;
1042         double yratio = (double)rect.h / (double)sp->height;
1043         for (i = 0; i < sp->sub.num_rects; i++) {
1044             SDL_Rect *sub_rect = (SDL_Rect*)sp->sub.rects[i];
1045             SDL_Rect target = {.x = rect.x + sub_rect->x * xratio,
1046                                .y = rect.y + sub_rect->y * yratio,
1047                                .w = sub_rect->w * xratio,
1048                                .h = sub_rect->h * yratio};
1049             SDL_RenderCopy(renderer, is->sub_texture, sub_rect, &target);
1050         }
1051 #endif
1052     }
1053 }
1054
1055 static inline int compute_mod(int a, int b)
1056 {
1057     return a < 0 ? a%b + b : a%b;
1058 }
1059
1060 static void video_audio_display(VideoState *s)
1061 {
1062     int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
1063     int ch, channels, h, h2;
1064     int64_t time_diff;
1065     int rdft_bits, nb_freq;
1066
1067     for (rdft_bits = 1; (1 << rdft_bits) < 2 * s->height; rdft_bits++)
1068         ;
1069     nb_freq = 1 << (rdft_bits - 1);
1070
1071     /* compute display index : center on currently output samples */
1072     channels = s->audio_tgt.channels;
1073     nb_display_channels = channels;
1074     if (!s->paused) {
1075         int data_used= s->show_mode == SHOW_MODE_WAVES ? s->width : (2*nb_freq);
1076         n = 2 * channels;
1077         delay = s->audio_write_buf_size;
1078         delay /= n;
1079
1080         /* to be more precise, we take into account the time spent since
1081            the last buffer computation */
1082         if (audio_callback_time) {
1083             time_diff = av_gettime_relative() - audio_callback_time;
1084             delay -= (time_diff * s->audio_tgt.freq) / 1000000;
1085         }
1086
1087         delay += 2 * data_used;
1088         if (delay < data_used)
1089             delay = data_used;
1090
1091         i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
1092         if (s->show_mode == SHOW_MODE_WAVES) {
1093             h = INT_MIN;
1094             for (i = 0; i < 1000; i += channels) {
1095                 int idx = (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
1096                 int a = s->sample_array[idx];
1097                 int b = s->sample_array[(idx + 4 * channels) % SAMPLE_ARRAY_SIZE];
1098                 int c = s->sample_array[(idx + 5 * channels) % SAMPLE_ARRAY_SIZE];
1099                 int d = s->sample_array[(idx + 9 * channels) % SAMPLE_ARRAY_SIZE];
1100                 int score = a - d;
1101                 if (h < score && (b ^ c) < 0) {
1102                     h = score;
1103                     i_start = idx;
1104                 }
1105             }
1106         }
1107
1108         s->last_i_start = i_start;
1109     } else {
1110         i_start = s->last_i_start;
1111     }
1112
1113     if (s->show_mode == SHOW_MODE_WAVES) {
1114         SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
1115
1116         /* total height for one channel */
1117         h = s->height / nb_display_channels;
1118         /* graph height / 2 */
1119         h2 = (h * 9) / 20;
1120         for (ch = 0; ch < nb_display_channels; ch++) {
1121             i = i_start + ch;
1122             y1 = s->ytop + ch * h + (h / 2); /* position of center line */
1123             for (x = 0; x < s->width; x++) {
1124                 y = (s->sample_array[i] * h2) >> 15;
1125                 if (y < 0) {
1126                     y = -y;
1127                     ys = y1 - y;
1128                 } else {
1129                     ys = y1;
1130                 }
1131                 fill_rectangle(s->xleft + x, ys, 1, y);
1132                 i += channels;
1133                 if (i >= SAMPLE_ARRAY_SIZE)
1134                     i -= SAMPLE_ARRAY_SIZE;
1135             }
1136         }
1137
1138         SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255);
1139
1140         for (ch = 1; ch < nb_display_channels; ch++) {
1141             y = s->ytop + ch * h;
1142             fill_rectangle(s->xleft, y, s->width, 1);
1143         }
1144     } else {
1145         if (realloc_texture(&s->vis_texture, SDL_PIXELFORMAT_ARGB8888, s->width, s->height, SDL_BLENDMODE_NONE, 1) < 0)
1146             return;
1147
1148         nb_display_channels= FFMIN(nb_display_channels, 2);
1149         if (rdft_bits != s->rdft_bits) {
1150             av_rdft_end(s->rdft);
1151             av_free(s->rdft_data);
1152             s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
1153             s->rdft_bits = rdft_bits;
1154             s->rdft_data = av_malloc_array(nb_freq, 4 *sizeof(*s->rdft_data));
1155         }
1156         if (!s->rdft || !s->rdft_data){
1157             av_log(NULL, AV_LOG_ERROR, "Failed to allocate buffers for RDFT, switching to waves display\n");
1158             s->show_mode = SHOW_MODE_WAVES;
1159         } else {
1160             FFTSample *data[2];
1161             SDL_Rect rect = {.x = s->xpos, .y = 0, .w = 1, .h = s->height};
1162             uint32_t *pixels;
1163             int pitch;
1164             for (ch = 0; ch < nb_display_channels; ch++) {
1165                 data[ch] = s->rdft_data + 2 * nb_freq * ch;
1166                 i = i_start + ch;
1167                 for (x = 0; x < 2 * nb_freq; x++) {
1168                     double w = (x-nb_freq) * (1.0 / nb_freq);
1169                     data[ch][x] = s->sample_array[i] * (1.0 - w * w);
1170                     i += channels;
1171                     if (i >= SAMPLE_ARRAY_SIZE)
1172                         i -= SAMPLE_ARRAY_SIZE;
1173                 }
1174                 av_rdft_calc(s->rdft, data[ch]);
1175             }
1176             /* Least efficient way to do this, we should of course
1177              * directly access it but it is more than fast enough. */
1178             if (!SDL_LockTexture(s->vis_texture, &rect, (void **)&pixels, &pitch)) {
1179                 pitch >>= 2;
1180                 pixels += pitch * s->height;
1181                 for (y = 0; y < s->height; y++) {
1182                     double w = 1 / sqrt(nb_freq);
1183                     int a = sqrt(w * sqrt(data[0][2 * y + 0] * data[0][2 * y + 0] + data[0][2 * y + 1] * data[0][2 * y + 1]));
1184                     int b = (nb_display_channels == 2 ) ? sqrt(w * hypot(data[1][2 * y + 0], data[1][2 * y + 1]))
1185                                                         : a;
1186                     a = FFMIN(a, 255);
1187                     b = FFMIN(b, 255);
1188                     pixels -= pitch;
1189                     *pixels = (a << 16) + (b << 8) + ((a+b) >> 1);
1190                 }
1191                 SDL_UnlockTexture(s->vis_texture);
1192             }
1193             SDL_RenderCopy(renderer, s->vis_texture, NULL, NULL);
1194         }
1195         if (!s->paused)
1196             s->xpos++;
1197         if (s->xpos >= s->width)
1198             s->xpos= s->xleft;
1199     }
1200 }
1201
1202 static void stream_component_close(VideoState *is, int stream_index)
1203 {
1204     AVFormatContext *ic = is->ic;
1205     AVCodecParameters *codecpar;
1206
1207     if (stream_index < 0 || stream_index >= ic->nb_streams)
1208         return;
1209     codecpar = ic->streams[stream_index]->codecpar;
1210
1211     switch (codecpar->codec_type) {
1212     case AVMEDIA_TYPE_AUDIO:
1213         decoder_abort(&is->auddec, &is->sampq);
1214         SDL_CloseAudioDevice(audio_dev);
1215         decoder_destroy(&is->auddec);
1216         swr_free(&is->swr_ctx);
1217         av_freep(&is->audio_buf1);
1218         is->audio_buf1_size = 0;
1219         is->audio_buf = NULL;
1220
1221         if (is->rdft) {
1222             av_rdft_end(is->rdft);
1223             av_freep(&is->rdft_data);
1224             is->rdft = NULL;
1225             is->rdft_bits = 0;
1226         }
1227         break;
1228     case AVMEDIA_TYPE_VIDEO:
1229         decoder_abort(&is->viddec, &is->pictq);
1230         decoder_destroy(&is->viddec);
1231         break;
1232     case AVMEDIA_TYPE_SUBTITLE:
1233         decoder_abort(&is->subdec, &is->subpq);
1234         decoder_destroy(&is->subdec);
1235         break;
1236     default:
1237         break;
1238     }
1239
1240     ic->streams[stream_index]->discard = AVDISCARD_ALL;
1241     switch (codecpar->codec_type) {
1242     case AVMEDIA_TYPE_AUDIO:
1243         is->audio_st = NULL;
1244         is->audio_stream = -1;
1245         break;
1246     case AVMEDIA_TYPE_VIDEO:
1247         is->video_st = NULL;
1248         is->video_stream = -1;
1249         break;
1250     case AVMEDIA_TYPE_SUBTITLE:
1251         is->subtitle_st = NULL;
1252         is->subtitle_stream = -1;
1253         break;
1254     default:
1255         break;
1256     }
1257 }
1258
1259 static void stream_close(VideoState *is)
1260 {
1261     /* XXX: use a special url_shutdown call to abort parse cleanly */
1262     is->abort_request = 1;
1263     SDL_WaitThread(is->read_tid, NULL);
1264
1265     /* close each stream */
1266     if (is->audio_stream >= 0)
1267         stream_component_close(is, is->audio_stream);
1268     if (is->video_stream >= 0)
1269         stream_component_close(is, is->video_stream);
1270     if (is->subtitle_stream >= 0)
1271         stream_component_close(is, is->subtitle_stream);
1272
1273     avformat_close_input(&is->ic);
1274
1275     packet_queue_destroy(&is->videoq);
1276     packet_queue_destroy(&is->audioq);
1277     packet_queue_destroy(&is->subtitleq);
1278
1279     /* free all pictures */
1280     frame_queue_destory(&is->pictq);
1281     frame_queue_destory(&is->sampq);
1282     frame_queue_destory(&is->subpq);
1283     SDL_DestroyCond(is->continue_read_thread);
1284     sws_freeContext(is->img_convert_ctx);
1285     sws_freeContext(is->sub_convert_ctx);
1286     av_free(is->filename);
1287     if (is->vis_texture)
1288         SDL_DestroyTexture(is->vis_texture);
1289     if (is->vid_texture)
1290         SDL_DestroyTexture(is->vid_texture);
1291     if (is->sub_texture)
1292         SDL_DestroyTexture(is->sub_texture);
1293     av_free(is);
1294 }
1295
1296 static void do_exit(VideoState *is)
1297 {
1298     if (is) {
1299         stream_close(is);
1300     }
1301     if (renderer)
1302         SDL_DestroyRenderer(renderer);
1303     if (window)
1304         SDL_DestroyWindow(window);
1305     uninit_opts();
1306 #if CONFIG_AVFILTER
1307     av_freep(&vfilters_list);
1308 #endif
1309     avformat_network_deinit();
1310     if (show_status)
1311         printf("\n");
1312     SDL_Quit();
1313     av_log(NULL, AV_LOG_QUIET, "%s", "");
1314     exit(0);
1315 }
1316
1317 static void sigterm_handler(int sig)
1318 {
1319     exit(123);
1320 }
1321
1322 static void set_default_window_size(int width, int height, AVRational sar)
1323 {
1324     SDL_Rect rect;
1325     int max_width  = screen_width  ? screen_width  : INT_MAX;
1326     int max_height = screen_height ? screen_height : INT_MAX;
1327     if (max_width == INT_MAX && max_height == INT_MAX)
1328         max_height = height;
1329     calculate_display_rect(&rect, 0, 0, max_width, max_height, width, height, sar);
1330     default_width  = rect.w;
1331     default_height = rect.h;
1332 }
1333
1334 static int video_open(VideoState *is)
1335 {
1336     int w,h;
1337
1338     w = screen_width ? screen_width : default_width;
1339     h = screen_height ? screen_height : default_height;
1340
1341     if (!window_title)
1342         window_title = input_filename;
1343     SDL_SetWindowTitle(window, window_title);
1344
1345     SDL_SetWindowSize(window, w, h);
1346     SDL_SetWindowPosition(window, screen_left, screen_top);
1347     if (is_full_screen)
1348         SDL_SetWindowFullscreen(window, SDL_WINDOW_FULLSCREEN_DESKTOP);
1349     SDL_ShowWindow(window);
1350
1351     is->width  = w;
1352     is->height = h;
1353
1354     return 0;
1355 }
1356
1357 /* display the current picture, if any */
1358 static void video_display(VideoState *is)
1359 {
1360     if (!is->width)
1361         video_open(is);
1362
1363     SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
1364     SDL_RenderClear(renderer);
1365     if (is->audio_st && is->show_mode != SHOW_MODE_VIDEO)
1366         video_audio_display(is);
1367     else if (is->video_st)
1368         video_image_display(is);
1369     SDL_RenderPresent(renderer);
1370 }
1371
1372 static double get_clock(Clock *c)
1373 {
1374     if (*c->queue_serial != c->serial)
1375         return NAN;
1376     if (c->paused) {
1377         return c->pts;
1378     } else {
1379         double time = av_gettime_relative() / 1000000.0;
1380         return c->pts_drift + time - (time - c->last_updated) * (1.0 - c->speed);
1381     }
1382 }
1383
1384 static void set_clock_at(Clock *c, double pts, int serial, double time)
1385 {
1386     c->pts = pts;
1387     c->last_updated = time;
1388     c->pts_drift = c->pts - time;
1389     c->serial = serial;
1390 }
1391
1392 static void set_clock(Clock *c, double pts, int serial)
1393 {
1394     double time = av_gettime_relative() / 1000000.0;
1395     set_clock_at(c, pts, serial, time);
1396 }
1397
1398 static void set_clock_speed(Clock *c, double speed)
1399 {
1400     set_clock(c, get_clock(c), c->serial);
1401     c->speed = speed;
1402 }
1403
1404 static void init_clock(Clock *c, int *queue_serial)
1405 {
1406     c->speed = 1.0;
1407     c->paused = 0;
1408     c->queue_serial = queue_serial;
1409     set_clock(c, NAN, -1);
1410 }
1411
1412 static void sync_clock_to_slave(Clock *c, Clock *slave)
1413 {
1414     double clock = get_clock(c);
1415     double slave_clock = get_clock(slave);
1416     if (!isnan(slave_clock) && (isnan(clock) || fabs(clock - slave_clock) > AV_NOSYNC_THRESHOLD))
1417         set_clock(c, slave_clock, slave->serial);
1418 }
1419
1420 static int get_master_sync_type(VideoState *is) {
1421     if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
1422         if (is->video_st)
1423             return AV_SYNC_VIDEO_MASTER;
1424         else
1425             return AV_SYNC_AUDIO_MASTER;
1426     } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
1427         if (is->audio_st)
1428             return AV_SYNC_AUDIO_MASTER;
1429         else
1430             return AV_SYNC_EXTERNAL_CLOCK;
1431     } else {
1432         return AV_SYNC_EXTERNAL_CLOCK;
1433     }
1434 }
1435
1436 /* get the current master clock value */
1437 static double get_master_clock(VideoState *is)
1438 {
1439     double val;
1440
1441     switch (get_master_sync_type(is)) {
1442         case AV_SYNC_VIDEO_MASTER:
1443             val = get_clock(&is->vidclk);
1444             break;
1445         case AV_SYNC_AUDIO_MASTER:
1446             val = get_clock(&is->audclk);
1447             break;
1448         default:
1449             val = get_clock(&is->extclk);
1450             break;
1451     }
1452     return val;
1453 }
1454
1455 static void check_external_clock_speed(VideoState *is) {
1456    if (is->video_stream >= 0 && is->videoq.nb_packets <= EXTERNAL_CLOCK_MIN_FRAMES ||
1457        is->audio_stream >= 0 && is->audioq.nb_packets <= EXTERNAL_CLOCK_MIN_FRAMES) {
1458        set_clock_speed(&is->extclk, FFMAX(EXTERNAL_CLOCK_SPEED_MIN, is->extclk.speed - EXTERNAL_CLOCK_SPEED_STEP));
1459    } else if ((is->video_stream < 0 || is->videoq.nb_packets > EXTERNAL_CLOCK_MAX_FRAMES) &&
1460               (is->audio_stream < 0 || is->audioq.nb_packets > EXTERNAL_CLOCK_MAX_FRAMES)) {
1461        set_clock_speed(&is->extclk, FFMIN(EXTERNAL_CLOCK_SPEED_MAX, is->extclk.speed + EXTERNAL_CLOCK_SPEED_STEP));
1462    } else {
1463        double speed = is->extclk.speed;
1464        if (speed != 1.0)
1465            set_clock_speed(&is->extclk, speed + EXTERNAL_CLOCK_SPEED_STEP * (1.0 - speed) / fabs(1.0 - speed));
1466    }
1467 }
1468
1469 /* seek in the stream */
1470 static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_bytes)
1471 {
1472     if (!is->seek_req) {
1473         is->seek_pos = pos;
1474         is->seek_rel = rel;
1475         is->seek_flags &= ~AVSEEK_FLAG_BYTE;
1476         if (seek_by_bytes)
1477             is->seek_flags |= AVSEEK_FLAG_BYTE;
1478         is->seek_req = 1;
1479         SDL_CondSignal(is->continue_read_thread);
1480     }
1481 }
1482
1483 /* pause or resume the video */
1484 static void stream_toggle_pause(VideoState *is)
1485 {
1486     if (is->paused) {
1487         is->frame_timer += av_gettime_relative() / 1000000.0 - is->vidclk.last_updated;
1488         if (is->read_pause_return != AVERROR(ENOSYS)) {
1489             is->vidclk.paused = 0;
1490         }
1491         set_clock(&is->vidclk, get_clock(&is->vidclk), is->vidclk.serial);
1492     }
1493     set_clock(&is->extclk, get_clock(&is->extclk), is->extclk.serial);
1494     is->paused = is->audclk.paused = is->vidclk.paused = is->extclk.paused = !is->paused;
1495 }
1496
1497 static void toggle_pause(VideoState *is)
1498 {
1499     stream_toggle_pause(is);
1500     is->step = 0;
1501 }
1502
1503 static void toggle_mute(VideoState *is)
1504 {
1505     is->muted = !is->muted;
1506 }
1507
1508 static void update_volume(VideoState *is, int sign, double step)
1509 {
1510     double volume_level = is->audio_volume ? (20 * log(is->audio_volume / (double)SDL_MIX_MAXVOLUME) / log(10)) : -1000.0;
1511     int new_volume = lrint(SDL_MIX_MAXVOLUME * pow(10.0, (volume_level + sign * step) / 20.0));
1512     is->audio_volume = av_clip(is->audio_volume == new_volume ? (is->audio_volume + sign) : new_volume, 0, SDL_MIX_MAXVOLUME);
1513 }
1514
1515 static void step_to_next_frame(VideoState *is)
1516 {
1517     /* if the stream is paused unpause it, then step */
1518     if (is->paused)
1519         stream_toggle_pause(is);
1520     is->step = 1;
1521 }
1522
1523 static double compute_target_delay(double delay, VideoState *is)
1524 {
1525     double sync_threshold, diff = 0;
1526
1527     /* update delay to follow master synchronisation source */
1528     if (get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER) {
1529         /* if video is slave, we try to correct big delays by
1530            duplicating or deleting a frame */
1531         diff = get_clock(&is->vidclk) - get_master_clock(is);
1532
1533         /* skip or repeat frame. We take into account the
1534            delay to compute the threshold. I still don't know
1535            if it is the best guess */
1536         sync_threshold = FFMAX(AV_SYNC_THRESHOLD_MIN, FFMIN(AV_SYNC_THRESHOLD_MAX, delay));
1537         if (!isnan(diff) && fabs(diff) < is->max_frame_duration) {
1538             if (diff <= -sync_threshold)
1539                 delay = FFMAX(0, delay + diff);
1540             else if (diff >= sync_threshold && delay > AV_SYNC_FRAMEDUP_THRESHOLD)
1541                 delay = delay + diff;
1542             else if (diff >= sync_threshold)
1543                 delay = 2 * delay;
1544         }
1545     }
1546
1547     av_log(NULL, AV_LOG_TRACE, "video: delay=%0.3f A-V=%f\n",
1548             delay, -diff);
1549
1550     return delay;
1551 }
1552
1553 static double vp_duration(VideoState *is, Frame *vp, Frame *nextvp) {
1554     if (vp->serial == nextvp->serial) {
1555         double duration = nextvp->pts - vp->pts;
1556         if (isnan(duration) || duration <= 0 || duration > is->max_frame_duration)
1557             return vp->duration;
1558         else
1559             return duration;
1560     } else {
1561         return 0.0;
1562     }
1563 }
1564
1565 static void update_video_pts(VideoState *is, double pts, int64_t pos, int serial) {
1566     /* update current video pts */
1567     set_clock(&is->vidclk, pts, serial);
1568     sync_clock_to_slave(&is->extclk, &is->vidclk);
1569 }
1570
1571 /* called to display each frame */
1572 static void video_refresh(void *opaque, double *remaining_time)
1573 {
1574     VideoState *is = opaque;
1575     double time;
1576
1577     Frame *sp, *sp2;
1578
1579     if (!is->paused && get_master_sync_type(is) == AV_SYNC_EXTERNAL_CLOCK && is->realtime)
1580         check_external_clock_speed(is);
1581
1582     if (!display_disable && is->show_mode != SHOW_MODE_VIDEO && is->audio_st) {
1583         time = av_gettime_relative() / 1000000.0;
1584         if (is->force_refresh || is->last_vis_time + rdftspeed < time) {
1585             video_display(is);
1586             is->last_vis_time = time;
1587         }
1588         *remaining_time = FFMIN(*remaining_time, is->last_vis_time + rdftspeed - time);
1589     }
1590
1591     if (is->video_st) {
1592 retry:
1593         if (frame_queue_nb_remaining(&is->pictq) == 0) {
1594             // nothing to do, no picture to display in the queue
1595         } else {
1596             double last_duration, duration, delay;
1597             Frame *vp, *lastvp;
1598
1599             /* dequeue the picture */
1600             lastvp = frame_queue_peek_last(&is->pictq);
1601             vp = frame_queue_peek(&is->pictq);
1602
1603             if (vp->serial != is->videoq.serial) {
1604                 frame_queue_next(&is->pictq);
1605                 goto retry;
1606             }
1607
1608             if (lastvp->serial != vp->serial)
1609                 is->frame_timer = av_gettime_relative() / 1000000.0;
1610
1611             if (is->paused)
1612                 goto display;
1613
1614             /* compute nominal last_duration */
1615             last_duration = vp_duration(is, lastvp, vp);
1616             delay = compute_target_delay(last_duration, is);
1617
1618             time= av_gettime_relative()/1000000.0;
1619             if (time < is->frame_timer + delay) {
1620                 *remaining_time = FFMIN(is->frame_timer + delay - time, *remaining_time);
1621                 goto display;
1622             }
1623
1624             is->frame_timer += delay;
1625             if (delay > 0 && time - is->frame_timer > AV_SYNC_THRESHOLD_MAX)
1626                 is->frame_timer = time;
1627
1628             SDL_LockMutex(is->pictq.mutex);
1629             if (!isnan(vp->pts))
1630                 update_video_pts(is, vp->pts, vp->pos, vp->serial);
1631             SDL_UnlockMutex(is->pictq.mutex);
1632
1633             if (frame_queue_nb_remaining(&is->pictq) > 1) {
1634                 Frame *nextvp = frame_queue_peek_next(&is->pictq);
1635                 duration = vp_duration(is, vp, nextvp);
1636                 if(!is->step && (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) && time > is->frame_timer + duration){
1637                     is->frame_drops_late++;
1638                     frame_queue_next(&is->pictq);
1639                     goto retry;
1640                 }
1641             }
1642
1643             if (is->subtitle_st) {
1644                     while (frame_queue_nb_remaining(&is->subpq) > 0) {
1645                         sp = frame_queue_peek(&is->subpq);
1646
1647                         if (frame_queue_nb_remaining(&is->subpq) > 1)
1648                             sp2 = frame_queue_peek_next(&is->subpq);
1649                         else
1650                             sp2 = NULL;
1651
1652                         if (sp->serial != is->subtitleq.serial
1653                                 || (is->vidclk.pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
1654                                 || (sp2 && is->vidclk.pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
1655                         {
1656                             if (sp->uploaded) {
1657                                 int i;
1658                                 for (i = 0; i < sp->sub.num_rects; i++) {
1659                                     AVSubtitleRect *sub_rect = sp->sub.rects[i];
1660                                     uint8_t *pixels;
1661                                     int pitch, j;
1662
1663                                     if (!SDL_LockTexture(is->sub_texture, (SDL_Rect *)sub_rect, (void **)&pixels, &pitch)) {
1664                                         for (j = 0; j < sub_rect->h; j++, pixels += pitch)
1665                                             memset(pixels, 0, sub_rect->w << 2);
1666                                         SDL_UnlockTexture(is->sub_texture);
1667                                     }
1668                                 }
1669                             }
1670                             frame_queue_next(&is->subpq);
1671                         } else {
1672                             break;
1673                         }
1674                     }
1675             }
1676
1677             frame_queue_next(&is->pictq);
1678             is->force_refresh = 1;
1679
1680             if (is->step && !is->paused)
1681                 stream_toggle_pause(is);
1682         }
1683 display:
1684         /* display picture */
1685         if (!display_disable && is->force_refresh && is->show_mode == SHOW_MODE_VIDEO && is->pictq.rindex_shown)
1686             video_display(is);
1687     }
1688     is->force_refresh = 0;
1689     if (show_status) {
1690         static int64_t last_time;
1691         int64_t cur_time;
1692         int aqsize, vqsize, sqsize;
1693         double av_diff;
1694
1695         cur_time = av_gettime_relative();
1696         if (!last_time || (cur_time - last_time) >= 30000) {
1697             aqsize = 0;
1698             vqsize = 0;
1699             sqsize = 0;
1700             if (is->audio_st)
1701                 aqsize = is->audioq.size;
1702             if (is->video_st)
1703                 vqsize = is->videoq.size;
1704             if (is->subtitle_st)
1705                 sqsize = is->subtitleq.size;
1706             av_diff = 0;
1707             if (is->audio_st && is->video_st)
1708                 av_diff = get_clock(&is->audclk) - get_clock(&is->vidclk);
1709             else if (is->video_st)
1710                 av_diff = get_master_clock(is) - get_clock(&is->vidclk);
1711             else if (is->audio_st)
1712                 av_diff = get_master_clock(is) - get_clock(&is->audclk);
1713             av_log(NULL, AV_LOG_INFO,
1714                    "%7.2f %s:%7.3f fd=%4d aq=%5dKB vq=%5dKB sq=%5dB f=%"PRId64"/%"PRId64"   \r",
1715                    get_master_clock(is),
1716                    (is->audio_st && is->video_st) ? "A-V" : (is->video_st ? "M-V" : (is->audio_st ? "M-A" : "   ")),
1717                    av_diff,
1718                    is->frame_drops_early + is->frame_drops_late,
1719                    aqsize / 1024,
1720                    vqsize / 1024,
1721                    sqsize,
1722                    is->video_st ? is->viddec.avctx->pts_correction_num_faulty_dts : 0,
1723                    is->video_st ? is->viddec.avctx->pts_correction_num_faulty_pts : 0);
1724             fflush(stdout);
1725             last_time = cur_time;
1726         }
1727     }
1728 }
1729
1730 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts, double duration, int64_t pos, int serial)
1731 {
1732     Frame *vp;
1733
1734 #if defined(DEBUG_SYNC)
1735     printf("frame_type=%c pts=%0.3f\n",
1736            av_get_picture_type_char(src_frame->pict_type), pts);
1737 #endif
1738
1739     if (!(vp = frame_queue_peek_writable(&is->pictq)))
1740         return -1;
1741
1742     vp->sar = src_frame->sample_aspect_ratio;
1743     vp->uploaded = 0;
1744
1745     vp->width = src_frame->width;
1746     vp->height = src_frame->height;
1747     vp->format = src_frame->format;
1748
1749     vp->pts = pts;
1750     vp->duration = duration;
1751     vp->pos = pos;
1752     vp->serial = serial;
1753
1754     set_default_window_size(vp->width, vp->height, vp->sar);
1755
1756     av_frame_move_ref(vp->frame, src_frame);
1757     frame_queue_push(&is->pictq);
1758     return 0;
1759 }
1760
1761 static int get_video_frame(VideoState *is, AVFrame *frame)
1762 {
1763     int got_picture;
1764
1765     if ((got_picture = decoder_decode_frame(&is->viddec, frame, NULL)) < 0)
1766         return -1;
1767
1768     if (got_picture) {
1769         double dpts = NAN;
1770
1771         if (frame->pts != AV_NOPTS_VALUE)
1772             dpts = av_q2d(is->video_st->time_base) * frame->pts;
1773
1774         frame->sample_aspect_ratio = av_guess_sample_aspect_ratio(is->ic, is->video_st, frame);
1775
1776         if (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) {
1777             if (frame->pts != AV_NOPTS_VALUE) {
1778                 double diff = dpts - get_master_clock(is);
1779                 if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD &&
1780                     diff - is->frame_last_filter_delay < 0 &&
1781                     is->viddec.pkt_serial == is->vidclk.serial &&
1782                     is->videoq.nb_packets) {
1783                     is->frame_drops_early++;
1784                     av_frame_unref(frame);
1785                     got_picture = 0;
1786                 }
1787             }
1788         }
1789     }
1790
1791     return got_picture;
1792 }
1793
1794 #if CONFIG_AVFILTER
1795 static int configure_filtergraph(AVFilterGraph *graph, const char *filtergraph,
1796                                  AVFilterContext *source_ctx, AVFilterContext *sink_ctx)
1797 {
1798     int ret, i;
1799     int nb_filters = graph->nb_filters;
1800     AVFilterInOut *outputs = NULL, *inputs = NULL;
1801
1802     if (filtergraph) {
1803         outputs = avfilter_inout_alloc();
1804         inputs  = avfilter_inout_alloc();
1805         if (!outputs || !inputs) {
1806             ret = AVERROR(ENOMEM);
1807             goto fail;
1808         }
1809
1810         outputs->name       = av_strdup("in");
1811         outputs->filter_ctx = source_ctx;
1812         outputs->pad_idx    = 0;
1813         outputs->next       = NULL;
1814
1815         inputs->name        = av_strdup("out");
1816         inputs->filter_ctx  = sink_ctx;
1817         inputs->pad_idx     = 0;
1818         inputs->next        = NULL;
1819
1820         if ((ret = avfilter_graph_parse_ptr(graph, filtergraph, &inputs, &outputs, NULL)) < 0)
1821             goto fail;
1822     } else {
1823         if ((ret = avfilter_link(source_ctx, 0, sink_ctx, 0)) < 0)
1824             goto fail;
1825     }
1826
1827     /* Reorder the filters to ensure that inputs of the custom filters are merged first */
1828     for (i = 0; i < graph->nb_filters - nb_filters; i++)
1829         FFSWAP(AVFilterContext*, graph->filters[i], graph->filters[i + nb_filters]);
1830
1831     ret = avfilter_graph_config(graph, NULL);
1832 fail:
1833     avfilter_inout_free(&outputs);
1834     avfilter_inout_free(&inputs);
1835     return ret;
1836 }
1837
1838 static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const char *vfilters, AVFrame *frame)
1839 {
1840     enum AVPixelFormat pix_fmts[FF_ARRAY_ELEMS(sdl_texture_format_map)];
1841     char sws_flags_str[512] = "";
1842     char buffersrc_args[256];
1843     int ret;
1844     AVFilterContext *filt_src = NULL, *filt_out = NULL, *last_filter = NULL;
1845     AVCodecParameters *codecpar = is->video_st->codecpar;
1846     AVRational fr = av_guess_frame_rate(is->ic, is->video_st, NULL);
1847     AVDictionaryEntry *e = NULL;
1848     int nb_pix_fmts = 0;
1849     int i, j;
1850
1851     for (i = 0; i < renderer_info.num_texture_formats; i++) {
1852         for (j = 0; j < FF_ARRAY_ELEMS(sdl_texture_format_map) - 1; j++) {
1853             if (renderer_info.texture_formats[i] == sdl_texture_format_map[j].texture_fmt) {
1854                 pix_fmts[nb_pix_fmts++] = sdl_texture_format_map[j].format;
1855                 break;
1856             }
1857         }
1858     }
1859     pix_fmts[nb_pix_fmts] = AV_PIX_FMT_NONE;
1860
1861     while ((e = av_dict_get(sws_dict, "", e, AV_DICT_IGNORE_SUFFIX))) {
1862         if (!strcmp(e->key, "sws_flags")) {
1863             av_strlcatf(sws_flags_str, sizeof(sws_flags_str), "%s=%s:", "flags", e->value);
1864         } else
1865             av_strlcatf(sws_flags_str, sizeof(sws_flags_str), "%s=%s:", e->key, e->value);
1866     }
1867     if (strlen(sws_flags_str))
1868         sws_flags_str[strlen(sws_flags_str)-1] = '\0';
1869
1870     graph->scale_sws_opts = av_strdup(sws_flags_str);
1871
1872     snprintf(buffersrc_args, sizeof(buffersrc_args),
1873              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
1874              frame->width, frame->height, frame->format,
1875              is->video_st->time_base.num, is->video_st->time_base.den,
1876              codecpar->sample_aspect_ratio.num, FFMAX(codecpar->sample_aspect_ratio.den, 1));
1877     if (fr.num && fr.den)
1878         av_strlcatf(buffersrc_args, sizeof(buffersrc_args), ":frame_rate=%d/%d", fr.num, fr.den);
1879
1880     if ((ret = avfilter_graph_create_filter(&filt_src,
1881                                             avfilter_get_by_name("buffer"),
1882                                             "ffplay_buffer", buffersrc_args, NULL,
1883                                             graph)) < 0)
1884         goto fail;
1885
1886     ret = avfilter_graph_create_filter(&filt_out,
1887                                        avfilter_get_by_name("buffersink"),
1888                                        "ffplay_buffersink", NULL, NULL, graph);
1889     if (ret < 0)
1890         goto fail;
1891
1892     if ((ret = av_opt_set_int_list(filt_out, "pix_fmts", pix_fmts,  AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1893         goto fail;
1894
1895     last_filter = filt_out;
1896
1897 /* Note: this macro adds a filter before the lastly added filter, so the
1898  * processing order of the filters is in reverse */
1899 #define INSERT_FILT(name, arg) do {                                          \
1900     AVFilterContext *filt_ctx;                                               \
1901                                                                              \
1902     ret = avfilter_graph_create_filter(&filt_ctx,                            \
1903                                        avfilter_get_by_name(name),           \
1904                                        "ffplay_" name, arg, NULL, graph);    \
1905     if (ret < 0)                                                             \
1906         goto fail;                                                           \
1907                                                                              \
1908     ret = avfilter_link(filt_ctx, 0, last_filter, 0);                        \
1909     if (ret < 0)                                                             \
1910         goto fail;                                                           \
1911                                                                              \
1912     last_filter = filt_ctx;                                                  \
1913 } while (0)
1914
1915     if (autorotate) {
1916         double theta  = get_rotation(is->video_st);
1917
1918         if (fabs(theta - 90) < 1.0) {
1919             INSERT_FILT("transpose", "clock");
1920         } else if (fabs(theta - 180) < 1.0) {
1921             INSERT_FILT("hflip", NULL);
1922             INSERT_FILT("vflip", NULL);
1923         } else if (fabs(theta - 270) < 1.0) {
1924             INSERT_FILT("transpose", "cclock");
1925         } else if (fabs(theta) > 1.0) {
1926             char rotate_buf[64];
1927             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
1928             INSERT_FILT("rotate", rotate_buf);
1929         }
1930     }
1931
1932     if ((ret = configure_filtergraph(graph, vfilters, filt_src, last_filter)) < 0)
1933         goto fail;
1934
1935     is->in_video_filter  = filt_src;
1936     is->out_video_filter = filt_out;
1937
1938 fail:
1939     return ret;
1940 }
1941
1942 static int configure_audio_filters(VideoState *is, const char *afilters, int force_output_format)
1943 {
1944     static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
1945     int sample_rates[2] = { 0, -1 };
1946     int64_t channel_layouts[2] = { 0, -1 };
1947     int channels[2] = { 0, -1 };
1948     AVFilterContext *filt_asrc = NULL, *filt_asink = NULL;
1949     char aresample_swr_opts[512] = "";
1950     AVDictionaryEntry *e = NULL;
1951     char asrc_args[256];
1952     int ret;
1953
1954     avfilter_graph_free(&is->agraph);
1955     if (!(is->agraph = avfilter_graph_alloc()))
1956         return AVERROR(ENOMEM);
1957
1958     while ((e = av_dict_get(swr_opts, "", e, AV_DICT_IGNORE_SUFFIX)))
1959         av_strlcatf(aresample_swr_opts, sizeof(aresample_swr_opts), "%s=%s:", e->key, e->value);
1960     if (strlen(aresample_swr_opts))
1961         aresample_swr_opts[strlen(aresample_swr_opts)-1] = '\0';
1962     av_opt_set(is->agraph, "aresample_swr_opts", aresample_swr_opts, 0);
1963
1964     ret = snprintf(asrc_args, sizeof(asrc_args),
1965                    "sample_rate=%d:sample_fmt=%s:channels=%d:time_base=%d/%d",
1966                    is->audio_filter_src.freq, av_get_sample_fmt_name(is->audio_filter_src.fmt),
1967                    is->audio_filter_src.channels,
1968                    1, is->audio_filter_src.freq);
1969     if (is->audio_filter_src.channel_layout)
1970         snprintf(asrc_args + ret, sizeof(asrc_args) - ret,
1971                  ":channel_layout=0x%"PRIx64,  is->audio_filter_src.channel_layout);
1972
1973     ret = avfilter_graph_create_filter(&filt_asrc,
1974                                        avfilter_get_by_name("abuffer"), "ffplay_abuffer",
1975                                        asrc_args, NULL, is->agraph);
1976     if (ret < 0)
1977         goto end;
1978
1979
1980     ret = avfilter_graph_create_filter(&filt_asink,
1981                                        avfilter_get_by_name("abuffersink"), "ffplay_abuffersink",
1982                                        NULL, NULL, is->agraph);
1983     if (ret < 0)
1984         goto end;
1985
1986     if ((ret = av_opt_set_int_list(filt_asink, "sample_fmts", sample_fmts,  AV_SAMPLE_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1987         goto end;
1988     if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
1989         goto end;
1990
1991     if (force_output_format) {
1992         channel_layouts[0] = is->audio_tgt.channel_layout;
1993         channels       [0] = is->audio_tgt.channels;
1994         sample_rates   [0] = is->audio_tgt.freq;
1995         if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 0, AV_OPT_SEARCH_CHILDREN)) < 0)
1996             goto end;
1997         if ((ret = av_opt_set_int_list(filt_asink, "channel_layouts", channel_layouts,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1998             goto end;
1999         if ((ret = av_opt_set_int_list(filt_asink, "channel_counts" , channels       ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
2000             goto end;
2001         if ((ret = av_opt_set_int_list(filt_asink, "sample_rates"   , sample_rates   ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
2002             goto end;
2003     }
2004
2005
2006     if ((ret = configure_filtergraph(is->agraph, afilters, filt_asrc, filt_asink)) < 0)
2007         goto end;
2008
2009     is->in_audio_filter  = filt_asrc;
2010     is->out_audio_filter = filt_asink;
2011
2012 end:
2013     if (ret < 0)
2014         avfilter_graph_free(&is->agraph);
2015     return ret;
2016 }
2017 #endif  /* CONFIG_AVFILTER */
2018
2019 static int audio_thread(void *arg)
2020 {
2021     VideoState *is = arg;
2022     AVFrame *frame = av_frame_alloc();
2023     Frame *af;
2024 #if CONFIG_AVFILTER
2025     int last_serial = -1;
2026     int64_t dec_channel_layout;
2027     int reconfigure;
2028 #endif
2029     int got_frame = 0;
2030     AVRational tb;
2031     int ret = 0;
2032
2033     if (!frame)
2034         return AVERROR(ENOMEM);
2035
2036     do {
2037         if ((got_frame = decoder_decode_frame(&is->auddec, frame, NULL)) < 0)
2038             goto the_end;
2039
2040         if (got_frame) {
2041                 tb = (AVRational){1, frame->sample_rate};
2042
2043 #if CONFIG_AVFILTER
2044                 dec_channel_layout = get_valid_channel_layout(frame->channel_layout, frame->channels);
2045
2046                 reconfigure =
2047                     cmp_audio_fmts(is->audio_filter_src.fmt, is->audio_filter_src.channels,
2048                                    frame->format, frame->channels)    ||
2049                     is->audio_filter_src.channel_layout != dec_channel_layout ||
2050                     is->audio_filter_src.freq           != frame->sample_rate ||
2051                     is->auddec.pkt_serial               != last_serial;
2052
2053                 if (reconfigure) {
2054                     char buf1[1024], buf2[1024];
2055                     av_get_channel_layout_string(buf1, sizeof(buf1), -1, is->audio_filter_src.channel_layout);
2056                     av_get_channel_layout_string(buf2, sizeof(buf2), -1, dec_channel_layout);
2057                     av_log(NULL, AV_LOG_DEBUG,
2058                            "Audio frame changed from rate:%d ch:%d fmt:%s layout:%s serial:%d to rate:%d ch:%d fmt:%s layout:%s serial:%d\n",
2059                            is->audio_filter_src.freq, is->audio_filter_src.channels, av_get_sample_fmt_name(is->audio_filter_src.fmt), buf1, last_serial,
2060                            frame->sample_rate, frame->channels, av_get_sample_fmt_name(frame->format), buf2, is->auddec.pkt_serial);
2061
2062                     is->audio_filter_src.fmt            = frame->format;
2063                     is->audio_filter_src.channels       = frame->channels;
2064                     is->audio_filter_src.channel_layout = dec_channel_layout;
2065                     is->audio_filter_src.freq           = frame->sample_rate;
2066                     last_serial                         = is->auddec.pkt_serial;
2067
2068                     if ((ret = configure_audio_filters(is, afilters, 1)) < 0)
2069                         goto the_end;
2070                 }
2071
2072             if ((ret = av_buffersrc_add_frame(is->in_audio_filter, frame)) < 0)
2073                 goto the_end;
2074
2075             while ((ret = av_buffersink_get_frame_flags(is->out_audio_filter, frame, 0)) >= 0) {
2076                 tb = av_buffersink_get_time_base(is->out_audio_filter);
2077 #endif
2078                 if (!(af = frame_queue_peek_writable(&is->sampq)))
2079                     goto the_end;
2080
2081                 af->pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
2082                 af->pos = frame->pkt_pos;
2083                 af->serial = is->auddec.pkt_serial;
2084                 af->duration = av_q2d((AVRational){frame->nb_samples, frame->sample_rate});
2085
2086                 av_frame_move_ref(af->frame, frame);
2087                 frame_queue_push(&is->sampq);
2088
2089 #if CONFIG_AVFILTER
2090                 if (is->audioq.serial != is->auddec.pkt_serial)
2091                     break;
2092             }
2093             if (ret == AVERROR_EOF)
2094                 is->auddec.finished = is->auddec.pkt_serial;
2095 #endif
2096         }
2097     } while (ret >= 0 || ret == AVERROR(EAGAIN) || ret == AVERROR_EOF);
2098  the_end:
2099 #if CONFIG_AVFILTER
2100     avfilter_graph_free(&is->agraph);
2101 #endif
2102     av_frame_free(&frame);
2103     return ret;
2104 }
2105
2106 static int decoder_start(Decoder *d, int (*fn)(void *), const char *thread_name, void* arg)
2107 {
2108     packet_queue_start(d->queue);
2109     d->decoder_tid = SDL_CreateThread(fn, thread_name, arg);
2110     if (!d->decoder_tid) {
2111         av_log(NULL, AV_LOG_ERROR, "SDL_CreateThread(): %s\n", SDL_GetError());
2112         return AVERROR(ENOMEM);
2113     }
2114     return 0;
2115 }
2116
2117 static int video_thread(void *arg)
2118 {
2119     VideoState *is = arg;
2120     AVFrame *frame = av_frame_alloc();
2121     double pts;
2122     double duration;
2123     int ret;
2124     AVRational tb = is->video_st->time_base;
2125     AVRational frame_rate = av_guess_frame_rate(is->ic, is->video_st, NULL);
2126
2127 #if CONFIG_AVFILTER
2128     AVFilterGraph *graph = NULL;
2129     AVFilterContext *filt_out = NULL, *filt_in = NULL;
2130     int last_w = 0;
2131     int last_h = 0;
2132     enum AVPixelFormat last_format = -2;
2133     int last_serial = -1;
2134     int last_vfilter_idx = 0;
2135 #endif
2136
2137     if (!frame)
2138         return AVERROR(ENOMEM);
2139
2140     for (;;) {
2141         ret = get_video_frame(is, frame);
2142         if (ret < 0)
2143             goto the_end;
2144         if (!ret)
2145             continue;
2146
2147 #if CONFIG_AVFILTER
2148         if (   last_w != frame->width
2149             || last_h != frame->height
2150             || last_format != frame->format
2151             || last_serial != is->viddec.pkt_serial
2152             || last_vfilter_idx != is->vfilter_idx) {
2153             av_log(NULL, AV_LOG_DEBUG,
2154                    "Video frame changed from size:%dx%d format:%s serial:%d to size:%dx%d format:%s serial:%d\n",
2155                    last_w, last_h,
2156                    (const char *)av_x_if_null(av_get_pix_fmt_name(last_format), "none"), last_serial,
2157                    frame->width, frame->height,
2158                    (const char *)av_x_if_null(av_get_pix_fmt_name(frame->format), "none"), is->viddec.pkt_serial);
2159             avfilter_graph_free(&graph);
2160             graph = avfilter_graph_alloc();
2161             if (!graph) {
2162                 ret = AVERROR(ENOMEM);
2163                 goto the_end;
2164             }
2165             if ((ret = configure_video_filters(graph, is, vfilters_list ? vfilters_list[is->vfilter_idx] : NULL, frame)) < 0) {
2166                 SDL_Event event;
2167                 event.type = FF_QUIT_EVENT;
2168                 event.user.data1 = is;
2169                 SDL_PushEvent(&event);
2170                 goto the_end;
2171             }
2172             filt_in  = is->in_video_filter;
2173             filt_out = is->out_video_filter;
2174             last_w = frame->width;
2175             last_h = frame->height;
2176             last_format = frame->format;
2177             last_serial = is->viddec.pkt_serial;
2178             last_vfilter_idx = is->vfilter_idx;
2179             frame_rate = av_buffersink_get_frame_rate(filt_out);
2180         }
2181
2182         ret = av_buffersrc_add_frame(filt_in, frame);
2183         if (ret < 0)
2184             goto the_end;
2185
2186         while (ret >= 0) {
2187             is->frame_last_returned_time = av_gettime_relative() / 1000000.0;
2188
2189             ret = av_buffersink_get_frame_flags(filt_out, frame, 0);
2190             if (ret < 0) {
2191                 if (ret == AVERROR_EOF)
2192                     is->viddec.finished = is->viddec.pkt_serial;
2193                 ret = 0;
2194                 break;
2195             }
2196
2197             is->frame_last_filter_delay = av_gettime_relative() / 1000000.0 - is->frame_last_returned_time;
2198             if (fabs(is->frame_last_filter_delay) > AV_NOSYNC_THRESHOLD / 10.0)
2199                 is->frame_last_filter_delay = 0;
2200             tb = av_buffersink_get_time_base(filt_out);
2201 #endif
2202             duration = (frame_rate.num && frame_rate.den ? av_q2d((AVRational){frame_rate.den, frame_rate.num}) : 0);
2203             pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
2204             ret = queue_picture(is, frame, pts, duration, frame->pkt_pos, is->viddec.pkt_serial);
2205             av_frame_unref(frame);
2206 #if CONFIG_AVFILTER
2207             if (is->videoq.serial != is->viddec.pkt_serial)
2208                 break;
2209         }
2210 #endif
2211
2212         if (ret < 0)
2213             goto the_end;
2214     }
2215  the_end:
2216 #if CONFIG_AVFILTER
2217     avfilter_graph_free(&graph);
2218 #endif
2219     av_frame_free(&frame);
2220     return 0;
2221 }
2222
2223 static int subtitle_thread(void *arg)
2224 {
2225     VideoState *is = arg;
2226     Frame *sp;
2227     int got_subtitle;
2228     double pts;
2229
2230     for (;;) {
2231         if (!(sp = frame_queue_peek_writable(&is->subpq)))
2232             return 0;
2233
2234         if ((got_subtitle = decoder_decode_frame(&is->subdec, NULL, &sp->sub)) < 0)
2235             break;
2236
2237         pts = 0;
2238
2239         if (got_subtitle && sp->sub.format == 0) {
2240             if (sp->sub.pts != AV_NOPTS_VALUE)
2241                 pts = sp->sub.pts / (double)AV_TIME_BASE;
2242             sp->pts = pts;
2243             sp->serial = is->subdec.pkt_serial;
2244             sp->width = is->subdec.avctx->width;
2245             sp->height = is->subdec.avctx->height;
2246             sp->uploaded = 0;
2247
2248             /* now we can update the picture count */
2249             frame_queue_push(&is->subpq);
2250         } else if (got_subtitle) {
2251             avsubtitle_free(&sp->sub);
2252         }
2253     }
2254     return 0;
2255 }
2256
2257 /* copy samples for viewing in editor window */
2258 static void update_sample_display(VideoState *is, short *samples, int samples_size)
2259 {
2260     int size, len;
2261
2262     size = samples_size / sizeof(short);
2263     while (size > 0) {
2264         len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
2265         if (len > size)
2266             len = size;
2267         memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
2268         samples += len;
2269         is->sample_array_index += len;
2270         if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
2271             is->sample_array_index = 0;
2272         size -= len;
2273     }
2274 }
2275
2276 /* return the wanted number of samples to get better sync if sync_type is video
2277  * or external master clock */
2278 static int synchronize_audio(VideoState *is, int nb_samples)
2279 {
2280     int wanted_nb_samples = nb_samples;
2281
2282     /* if not master, then we try to remove or add samples to correct the clock */
2283     if (get_master_sync_type(is) != AV_SYNC_AUDIO_MASTER) {
2284         double diff, avg_diff;
2285         int min_nb_samples, max_nb_samples;
2286
2287         diff = get_clock(&is->audclk) - get_master_clock(is);
2288
2289         if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD) {
2290             is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
2291             if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
2292                 /* not enough measures to have a correct estimate */
2293                 is->audio_diff_avg_count++;
2294             } else {
2295                 /* estimate the A-V difference */
2296                 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
2297
2298                 if (fabs(avg_diff) >= is->audio_diff_threshold) {
2299                     wanted_nb_samples = nb_samples + (int)(diff * is->audio_src.freq);
2300                     min_nb_samples = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2301                     max_nb_samples = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2302                     wanted_nb_samples = av_clip(wanted_nb_samples, min_nb_samples, max_nb_samples);
2303                 }
2304                 av_log(NULL, AV_LOG_TRACE, "diff=%f adiff=%f sample_diff=%d apts=%0.3f %f\n",
2305                         diff, avg_diff, wanted_nb_samples - nb_samples,
2306                         is->audio_clock, is->audio_diff_threshold);
2307             }
2308         } else {
2309             /* too big difference : may be initial PTS errors, so
2310                reset A-V filter */
2311             is->audio_diff_avg_count = 0;
2312             is->audio_diff_cum       = 0;
2313         }
2314     }
2315
2316     return wanted_nb_samples;
2317 }
2318
2319 /**
2320  * Decode one audio frame and return its uncompressed size.
2321  *
2322  * The processed audio frame is decoded, converted if required, and
2323  * stored in is->audio_buf, with size in bytes given by the return
2324  * value.
2325  */
2326 static int audio_decode_frame(VideoState *is)
2327 {
2328     int data_size, resampled_data_size;
2329     int64_t dec_channel_layout;
2330     av_unused double audio_clock0;
2331     int wanted_nb_samples;
2332     Frame *af;
2333
2334     if (is->paused)
2335         return -1;
2336
2337     do {
2338 #if defined(_WIN32)
2339         while (frame_queue_nb_remaining(&is->sampq) == 0) {
2340             if ((av_gettime_relative() - audio_callback_time) > 1000000LL * is->audio_hw_buf_size / is->audio_tgt.bytes_per_sec / 2)
2341                 return -1;
2342             av_usleep (1000);
2343         }
2344 #endif
2345         if (!(af = frame_queue_peek_readable(&is->sampq)))
2346             return -1;
2347         frame_queue_next(&is->sampq);
2348     } while (af->serial != is->audioq.serial);
2349
2350     data_size = av_samples_get_buffer_size(NULL, af->frame->channels,
2351                                            af->frame->nb_samples,
2352                                            af->frame->format, 1);
2353
2354     dec_channel_layout =
2355         (af->frame->channel_layout && af->frame->channels == av_get_channel_layout_nb_channels(af->frame->channel_layout)) ?
2356         af->frame->channel_layout : av_get_default_channel_layout(af->frame->channels);
2357     wanted_nb_samples = synchronize_audio(is, af->frame->nb_samples);
2358
2359     if (af->frame->format        != is->audio_src.fmt            ||
2360         dec_channel_layout       != is->audio_src.channel_layout ||
2361         af->frame->sample_rate   != is->audio_src.freq           ||
2362         (wanted_nb_samples       != af->frame->nb_samples && !is->swr_ctx)) {
2363         swr_free(&is->swr_ctx);
2364         is->swr_ctx = swr_alloc_set_opts(NULL,
2365                                          is->audio_tgt.channel_layout, is->audio_tgt.fmt, is->audio_tgt.freq,
2366                                          dec_channel_layout,           af->frame->format, af->frame->sample_rate,
2367                                          0, NULL);
2368         if (!is->swr_ctx || swr_init(is->swr_ctx) < 0) {
2369             av_log(NULL, AV_LOG_ERROR,
2370                    "Cannot create sample rate converter for conversion of %d Hz %s %d channels to %d Hz %s %d channels!\n",
2371                     af->frame->sample_rate, av_get_sample_fmt_name(af->frame->format), af->frame->channels,
2372                     is->audio_tgt.freq, av_get_sample_fmt_name(is->audio_tgt.fmt), is->audio_tgt.channels);
2373             swr_free(&is->swr_ctx);
2374             return -1;
2375         }
2376         is->audio_src.channel_layout = dec_channel_layout;
2377         is->audio_src.channels       = af->frame->channels;
2378         is->audio_src.freq = af->frame->sample_rate;
2379         is->audio_src.fmt = af->frame->format;
2380     }
2381
2382     if (is->swr_ctx) {
2383         const uint8_t **in = (const uint8_t **)af->frame->extended_data;
2384         uint8_t **out = &is->audio_buf1;
2385         int out_count = (int64_t)wanted_nb_samples * is->audio_tgt.freq / af->frame->sample_rate + 256;
2386         int out_size  = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, out_count, is->audio_tgt.fmt, 0);
2387         int len2;
2388         if (out_size < 0) {
2389             av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size() failed\n");
2390             return -1;
2391         }
2392         if (wanted_nb_samples != af->frame->nb_samples) {
2393             if (swr_set_compensation(is->swr_ctx, (wanted_nb_samples - af->frame->nb_samples) * is->audio_tgt.freq / af->frame->sample_rate,
2394                                         wanted_nb_samples * is->audio_tgt.freq / af->frame->sample_rate) < 0) {
2395                 av_log(NULL, AV_LOG_ERROR, "swr_set_compensation() failed\n");
2396                 return -1;
2397             }
2398         }
2399         av_fast_malloc(&is->audio_buf1, &is->audio_buf1_size, out_size);
2400         if (!is->audio_buf1)
2401             return AVERROR(ENOMEM);
2402         len2 = swr_convert(is->swr_ctx, out, out_count, in, af->frame->nb_samples);
2403         if (len2 < 0) {
2404             av_log(NULL, AV_LOG_ERROR, "swr_convert() failed\n");
2405             return -1;
2406         }
2407         if (len2 == out_count) {
2408             av_log(NULL, AV_LOG_WARNING, "audio buffer is probably too small\n");
2409             if (swr_init(is->swr_ctx) < 0)
2410                 swr_free(&is->swr_ctx);
2411         }
2412         is->audio_buf = is->audio_buf1;
2413         resampled_data_size = len2 * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2414     } else {
2415         is->audio_buf = af->frame->data[0];
2416         resampled_data_size = data_size;
2417     }
2418
2419     audio_clock0 = is->audio_clock;
2420     /* update the audio clock with the pts */
2421     if (!isnan(af->pts))
2422         is->audio_clock = af->pts + (double) af->frame->nb_samples / af->frame->sample_rate;
2423     else
2424         is->audio_clock = NAN;
2425     is->audio_clock_serial = af->serial;
2426 #ifdef DEBUG
2427     {
2428         static double last_clock;
2429         printf("audio: delay=%0.3f clock=%0.3f clock0=%0.3f\n",
2430                is->audio_clock - last_clock,
2431                is->audio_clock, audio_clock0);
2432         last_clock = is->audio_clock;
2433     }
2434 #endif
2435     return resampled_data_size;
2436 }
2437
2438 /* prepare a new audio buffer */
2439 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
2440 {
2441     VideoState *is = opaque;
2442     int audio_size, len1;
2443
2444     audio_callback_time = av_gettime_relative();
2445
2446     while (len > 0) {
2447         if (is->audio_buf_index >= is->audio_buf_size) {
2448            audio_size = audio_decode_frame(is);
2449            if (audio_size < 0) {
2450                 /* if error, just output silence */
2451                is->audio_buf = NULL;
2452                is->audio_buf_size = SDL_AUDIO_MIN_BUFFER_SIZE / is->audio_tgt.frame_size * is->audio_tgt.frame_size;
2453            } else {
2454                if (is->show_mode != SHOW_MODE_VIDEO)
2455                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2456                is->audio_buf_size = audio_size;
2457            }
2458            is->audio_buf_index = 0;
2459         }
2460         len1 = is->audio_buf_size - is->audio_buf_index;
2461         if (len1 > len)
2462             len1 = len;
2463         if (!is->muted && is->audio_buf && is->audio_volume == SDL_MIX_MAXVOLUME)
2464             memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2465         else {
2466             memset(stream, 0, len1);
2467             if (!is->muted && is->audio_buf)
2468                 SDL_MixAudioFormat(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, AUDIO_S16SYS, len1, is->audio_volume);
2469         }
2470         len -= len1;
2471         stream += len1;
2472         is->audio_buf_index += len1;
2473     }
2474     is->audio_write_buf_size = is->audio_buf_size - is->audio_buf_index;
2475     /* Let's assume the audio driver that is used by SDL has two periods. */
2476     if (!isnan(is->audio_clock)) {
2477         set_clock_at(&is->audclk, is->audio_clock - (double)(2 * is->audio_hw_buf_size + is->audio_write_buf_size) / is->audio_tgt.bytes_per_sec, is->audio_clock_serial, audio_callback_time / 1000000.0);
2478         sync_clock_to_slave(&is->extclk, &is->audclk);
2479     }
2480 }
2481
2482 static int audio_open(void *opaque, int64_t wanted_channel_layout, int wanted_nb_channels, int wanted_sample_rate, struct AudioParams *audio_hw_params)
2483 {
2484     SDL_AudioSpec wanted_spec, spec;
2485     const char *env;
2486     static const int next_nb_channels[] = {0, 0, 1, 6, 2, 6, 4, 6};
2487     static const int next_sample_rates[] = {0, 44100, 48000, 96000, 192000};
2488     int next_sample_rate_idx = FF_ARRAY_ELEMS(next_sample_rates) - 1;
2489
2490     env = SDL_getenv("SDL_AUDIO_CHANNELS");
2491     if (env) {
2492         wanted_nb_channels = atoi(env);
2493         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2494     }
2495     if (!wanted_channel_layout || wanted_nb_channels != av_get_channel_layout_nb_channels(wanted_channel_layout)) {
2496         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2497         wanted_channel_layout &= ~AV_CH_LAYOUT_STEREO_DOWNMIX;
2498     }
2499     wanted_nb_channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
2500     wanted_spec.channels = wanted_nb_channels;
2501     wanted_spec.freq = wanted_sample_rate;
2502     if (wanted_spec.freq <= 0 || wanted_spec.channels <= 0) {
2503         av_log(NULL, AV_LOG_ERROR, "Invalid sample rate or channel count!\n");
2504         return -1;
2505     }
2506     while (next_sample_rate_idx && next_sample_rates[next_sample_rate_idx] >= wanted_spec.freq)
2507         next_sample_rate_idx--;
2508     wanted_spec.format = AUDIO_S16SYS;
2509     wanted_spec.silence = 0;
2510     wanted_spec.samples = FFMAX(SDL_AUDIO_MIN_BUFFER_SIZE, 2 << av_log2(wanted_spec.freq / SDL_AUDIO_MAX_CALLBACKS_PER_SEC));
2511     wanted_spec.callback = sdl_audio_callback;
2512     wanted_spec.userdata = opaque;
2513     while (!(audio_dev = SDL_OpenAudioDevice(NULL, 0, &wanted_spec, &spec, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE | SDL_AUDIO_ALLOW_CHANNELS_CHANGE))) {
2514         av_log(NULL, AV_LOG_WARNING, "SDL_OpenAudio (%d channels, %d Hz): %s\n",
2515                wanted_spec.channels, wanted_spec.freq, SDL_GetError());
2516         wanted_spec.channels = next_nb_channels[FFMIN(7, wanted_spec.channels)];
2517         if (!wanted_spec.channels) {
2518             wanted_spec.freq = next_sample_rates[next_sample_rate_idx--];
2519             wanted_spec.channels = wanted_nb_channels;
2520             if (!wanted_spec.freq) {
2521                 av_log(NULL, AV_LOG_ERROR,
2522                        "No more combinations to try, audio open failed\n");
2523                 return -1;
2524             }
2525         }
2526         wanted_channel_layout = av_get_default_channel_layout(wanted_spec.channels);
2527     }
2528     if (spec.format != AUDIO_S16SYS) {
2529         av_log(NULL, AV_LOG_ERROR,
2530                "SDL advised audio format %d is not supported!\n", spec.format);
2531         return -1;
2532     }
2533     if (spec.channels != wanted_spec.channels) {
2534         wanted_channel_layout = av_get_default_channel_layout(spec.channels);
2535         if (!wanted_channel_layout) {
2536             av_log(NULL, AV_LOG_ERROR,
2537                    "SDL advised channel count %d is not supported!\n", spec.channels);
2538             return -1;
2539         }
2540     }
2541
2542     audio_hw_params->fmt = AV_SAMPLE_FMT_S16;
2543     audio_hw_params->freq = spec.freq;
2544     audio_hw_params->channel_layout = wanted_channel_layout;
2545     audio_hw_params->channels =  spec.channels;
2546     audio_hw_params->frame_size = av_samples_get_buffer_size(NULL, audio_hw_params->channels, 1, audio_hw_params->fmt, 1);
2547     audio_hw_params->bytes_per_sec = av_samples_get_buffer_size(NULL, audio_hw_params->channels, audio_hw_params->freq, audio_hw_params->fmt, 1);
2548     if (audio_hw_params->bytes_per_sec <= 0 || audio_hw_params->frame_size <= 0) {
2549         av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size failed\n");
2550         return -1;
2551     }
2552     return spec.size;
2553 }
2554
2555 /* open a given stream. Return 0 if OK */
2556 static int stream_component_open(VideoState *is, int stream_index)
2557 {
2558     AVFormatContext *ic = is->ic;
2559     AVCodecContext *avctx;
2560     AVCodec *codec;
2561     const char *forced_codec_name = NULL;
2562     AVDictionary *opts = NULL;
2563     AVDictionaryEntry *t = NULL;
2564     int sample_rate, nb_channels;
2565     int64_t channel_layout;
2566     int ret = 0;
2567     int stream_lowres = lowres;
2568
2569     if (stream_index < 0 || stream_index >= ic->nb_streams)
2570         return -1;
2571
2572     avctx = avcodec_alloc_context3(NULL);
2573     if (!avctx)
2574         return AVERROR(ENOMEM);
2575
2576     ret = avcodec_parameters_to_context(avctx, ic->streams[stream_index]->codecpar);
2577     if (ret < 0)
2578         goto fail;
2579     avctx->pkt_timebase = ic->streams[stream_index]->time_base;
2580
2581     codec = avcodec_find_decoder(avctx->codec_id);
2582
2583     switch(avctx->codec_type){
2584         case AVMEDIA_TYPE_AUDIO   : is->last_audio_stream    = stream_index; forced_codec_name =    audio_codec_name; break;
2585         case AVMEDIA_TYPE_SUBTITLE: is->last_subtitle_stream = stream_index; forced_codec_name = subtitle_codec_name; break;
2586         case AVMEDIA_TYPE_VIDEO   : is->last_video_stream    = stream_index; forced_codec_name =    video_codec_name; break;
2587     }
2588     if (forced_codec_name)
2589         codec = avcodec_find_decoder_by_name(forced_codec_name);
2590     if (!codec) {
2591         if (forced_codec_name) av_log(NULL, AV_LOG_WARNING,
2592                                       "No codec could be found with name '%s'\n", forced_codec_name);
2593         else                   av_log(NULL, AV_LOG_WARNING,
2594                                       "No decoder could be found for codec %s\n", avcodec_get_name(avctx->codec_id));
2595         ret = AVERROR(EINVAL);
2596         goto fail;
2597     }
2598
2599     avctx->codec_id = codec->id;
2600     if (stream_lowres > codec->max_lowres) {
2601         av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
2602                 codec->max_lowres);
2603         stream_lowres = codec->max_lowres;
2604     }
2605     avctx->lowres = stream_lowres;
2606
2607     if (fast)
2608         avctx->flags2 |= AV_CODEC_FLAG2_FAST;
2609
2610     opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], codec);
2611     if (!av_dict_get(opts, "threads", NULL, 0))
2612         av_dict_set(&opts, "threads", "auto", 0);
2613     if (stream_lowres)
2614         av_dict_set_int(&opts, "lowres", stream_lowres, 0);
2615     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
2616         av_dict_set(&opts, "refcounted_frames", "1", 0);
2617     if ((ret = avcodec_open2(avctx, codec, &opts)) < 0) {
2618         goto fail;
2619     }
2620     if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2621         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2622         ret =  AVERROR_OPTION_NOT_FOUND;
2623         goto fail;
2624     }
2625
2626     is->eof = 0;
2627     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
2628     switch (avctx->codec_type) {
2629     case AVMEDIA_TYPE_AUDIO:
2630 #if CONFIG_AVFILTER
2631         {
2632             AVFilterContext *sink;
2633
2634             is->audio_filter_src.freq           = avctx->sample_rate;
2635             is->audio_filter_src.channels       = avctx->channels;
2636             is->audio_filter_src.channel_layout = get_valid_channel_layout(avctx->channel_layout, avctx->channels);
2637             is->audio_filter_src.fmt            = avctx->sample_fmt;
2638             if ((ret = configure_audio_filters(is, afilters, 0)) < 0)
2639                 goto fail;
2640             sink = is->out_audio_filter;
2641             sample_rate    = av_buffersink_get_sample_rate(sink);
2642             nb_channels    = av_buffersink_get_channels(sink);
2643             channel_layout = av_buffersink_get_channel_layout(sink);
2644         }
2645 #else
2646         sample_rate    = avctx->sample_rate;
2647         nb_channels    = avctx->channels;
2648         channel_layout = avctx->channel_layout;
2649 #endif
2650
2651         /* prepare audio output */
2652         if ((ret = audio_open(is, channel_layout, nb_channels, sample_rate, &is->audio_tgt)) < 0)
2653             goto fail;
2654         is->audio_hw_buf_size = ret;
2655         is->audio_src = is->audio_tgt;
2656         is->audio_buf_size  = 0;
2657         is->audio_buf_index = 0;
2658
2659         /* init averaging filter */
2660         is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2661         is->audio_diff_avg_count = 0;
2662         /* since we do not have a precise anough audio FIFO fullness,
2663            we correct audio sync only if larger than this threshold */
2664         is->audio_diff_threshold = (double)(is->audio_hw_buf_size) / is->audio_tgt.bytes_per_sec;
2665
2666         is->audio_stream = stream_index;
2667         is->audio_st = ic->streams[stream_index];
2668
2669         decoder_init(&is->auddec, avctx, &is->audioq, is->continue_read_thread);
2670         if ((is->ic->iformat->flags & (AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK)) && !is->ic->iformat->read_seek) {
2671             is->auddec.start_pts = is->audio_st->start_time;
2672             is->auddec.start_pts_tb = is->audio_st->time_base;
2673         }
2674         if ((ret = decoder_start(&is->auddec, audio_thread, "audio_decoder", is)) < 0)
2675             goto out;
2676         SDL_PauseAudioDevice(audio_dev, 0);
2677         break;
2678     case AVMEDIA_TYPE_VIDEO:
2679         is->video_stream = stream_index;
2680         is->video_st = ic->streams[stream_index];
2681
2682         decoder_init(&is->viddec, avctx, &is->videoq, is->continue_read_thread);
2683         if ((ret = decoder_start(&is->viddec, video_thread, "video_decoder", is)) < 0)
2684             goto out;
2685         is->queue_attachments_req = 1;
2686         break;
2687     case AVMEDIA_TYPE_SUBTITLE:
2688         is->subtitle_stream = stream_index;
2689         is->subtitle_st = ic->streams[stream_index];
2690
2691         decoder_init(&is->subdec, avctx, &is->subtitleq, is->continue_read_thread);
2692         if ((ret = decoder_start(&is->subdec, subtitle_thread, "subtitle_decoder", is)) < 0)
2693             goto out;
2694         break;
2695     default:
2696         break;
2697     }
2698     goto out;
2699
2700 fail:
2701     avcodec_free_context(&avctx);
2702 out:
2703     av_dict_free(&opts);
2704
2705     return ret;
2706 }
2707
2708 static int decode_interrupt_cb(void *ctx)
2709 {
2710     VideoState *is = ctx;
2711     return is->abort_request;
2712 }
2713
2714 static int stream_has_enough_packets(AVStream *st, int stream_id, PacketQueue *queue) {
2715     return stream_id < 0 ||
2716            queue->abort_request ||
2717            (st->disposition & AV_DISPOSITION_ATTACHED_PIC) ||
2718            queue->nb_packets > MIN_FRAMES && (!queue->duration || av_q2d(st->time_base) * queue->duration > 1.0);
2719 }
2720
2721 static int is_realtime(AVFormatContext *s)
2722 {
2723     if(   !strcmp(s->iformat->name, "rtp")
2724        || !strcmp(s->iformat->name, "rtsp")
2725        || !strcmp(s->iformat->name, "sdp")
2726     )
2727         return 1;
2728
2729     if(s->pb && (   !strncmp(s->url, "rtp:", 4)
2730                  || !strncmp(s->url, "udp:", 4)
2731                 )
2732     )
2733         return 1;
2734     return 0;
2735 }
2736
2737 /* this thread gets the stream from the disk or the network */
2738 static int read_thread(void *arg)
2739 {
2740     VideoState *is = arg;
2741     AVFormatContext *ic = NULL;
2742     int err, i, ret;
2743     int st_index[AVMEDIA_TYPE_NB];
2744     AVPacket pkt1, *pkt = &pkt1;
2745     int64_t stream_start_time;
2746     int pkt_in_play_range = 0;
2747     AVDictionaryEntry *t;
2748     SDL_mutex *wait_mutex = SDL_CreateMutex();
2749     int scan_all_pmts_set = 0;
2750     int64_t pkt_ts;
2751
2752     if (!wait_mutex) {
2753         av_log(NULL, AV_LOG_FATAL, "SDL_CreateMutex(): %s\n", SDL_GetError());
2754         ret = AVERROR(ENOMEM);
2755         goto fail;
2756     }
2757
2758     memset(st_index, -1, sizeof(st_index));
2759     is->last_video_stream = is->video_stream = -1;
2760     is->last_audio_stream = is->audio_stream = -1;
2761     is->last_subtitle_stream = is->subtitle_stream = -1;
2762     is->eof = 0;
2763
2764     ic = avformat_alloc_context();
2765     if (!ic) {
2766         av_log(NULL, AV_LOG_FATAL, "Could not allocate context.\n");
2767         ret = AVERROR(ENOMEM);
2768         goto fail;
2769     }
2770     ic->interrupt_callback.callback = decode_interrupt_cb;
2771     ic->interrupt_callback.opaque = is;
2772     if (!av_dict_get(format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE)) {
2773         av_dict_set(&format_opts, "scan_all_pmts", "1", AV_DICT_DONT_OVERWRITE);
2774         scan_all_pmts_set = 1;
2775     }
2776     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2777     if (err < 0) {
2778         print_error(is->filename, err);
2779         ret = -1;
2780         goto fail;
2781     }
2782     if (scan_all_pmts_set)
2783         av_dict_set(&format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE);
2784
2785     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2786         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2787         ret = AVERROR_OPTION_NOT_FOUND;
2788         goto fail;
2789     }
2790     is->ic = ic;
2791
2792     if (genpts)
2793         ic->flags |= AVFMT_FLAG_GENPTS;
2794
2795     av_format_inject_global_side_data(ic);
2796
2797     if (find_stream_info) {
2798         AVDictionary **opts = setup_find_stream_info_opts(ic, codec_opts);
2799         int orig_nb_streams = ic->nb_streams;
2800
2801         err = avformat_find_stream_info(ic, opts);
2802
2803         for (i = 0; i < orig_nb_streams; i++)
2804             av_dict_free(&opts[i]);
2805         av_freep(&opts);
2806
2807         if (err < 0) {
2808             av_log(NULL, AV_LOG_WARNING,
2809                    "%s: could not find codec parameters\n", is->filename);
2810             ret = -1;
2811             goto fail;
2812         }
2813     }
2814
2815     if (ic->pb)
2816         ic->pb->eof_reached = 0; // FIXME hack, ffplay maybe should not use avio_feof() to test for the end
2817
2818     if (seek_by_bytes < 0)
2819         seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT) && strcmp("ogg", ic->iformat->name);
2820
2821     is->max_frame_duration = (ic->iformat->flags & AVFMT_TS_DISCONT) ? 10.0 : 3600.0;
2822
2823     if (!window_title && (t = av_dict_get(ic->metadata, "title", NULL, 0)))
2824         window_title = av_asprintf("%s - %s", t->value, input_filename);
2825
2826     /* if seeking requested, we execute it */
2827     if (start_time != AV_NOPTS_VALUE) {
2828         int64_t timestamp;
2829
2830         timestamp = start_time;
2831         /* add the stream start time */
2832         if (ic->start_time != AV_NOPTS_VALUE)
2833             timestamp += ic->start_time;
2834         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
2835         if (ret < 0) {
2836             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
2837                     is->filename, (double)timestamp / AV_TIME_BASE);
2838         }
2839     }
2840
2841     is->realtime = is_realtime(ic);
2842
2843     if (show_status)
2844         av_dump_format(ic, 0, is->filename, 0);
2845
2846     for (i = 0; i < ic->nb_streams; i++) {
2847         AVStream *st = ic->streams[i];
2848         enum AVMediaType type = st->codecpar->codec_type;
2849         st->discard = AVDISCARD_ALL;
2850         if (type >= 0 && wanted_stream_spec[type] && st_index[type] == -1)
2851             if (avformat_match_stream_specifier(ic, st, wanted_stream_spec[type]) > 0)
2852                 st_index[type] = i;
2853     }
2854     for (i = 0; i < AVMEDIA_TYPE_NB; i++) {
2855         if (wanted_stream_spec[i] && st_index[i] == -1) {
2856             av_log(NULL, AV_LOG_ERROR, "Stream specifier %s does not match any %s stream\n", wanted_stream_spec[i], av_get_media_type_string(i));
2857             st_index[i] = INT_MAX;
2858         }
2859     }
2860
2861     if (!video_disable)
2862         st_index[AVMEDIA_TYPE_VIDEO] =
2863             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
2864                                 st_index[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
2865     if (!audio_disable)
2866         st_index[AVMEDIA_TYPE_AUDIO] =
2867             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
2868                                 st_index[AVMEDIA_TYPE_AUDIO],
2869                                 st_index[AVMEDIA_TYPE_VIDEO],
2870                                 NULL, 0);
2871     if (!video_disable && !subtitle_disable)
2872         st_index[AVMEDIA_TYPE_SUBTITLE] =
2873             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
2874                                 st_index[AVMEDIA_TYPE_SUBTITLE],
2875                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
2876                                  st_index[AVMEDIA_TYPE_AUDIO] :
2877                                  st_index[AVMEDIA_TYPE_VIDEO]),
2878                                 NULL, 0);
2879
2880     is->show_mode = show_mode;
2881     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2882         AVStream *st = ic->streams[st_index[AVMEDIA_TYPE_VIDEO]];
2883         AVCodecParameters *codecpar = st->codecpar;
2884         AVRational sar = av_guess_sample_aspect_ratio(ic, st, NULL);
2885         if (codecpar->width)
2886             set_default_window_size(codecpar->width, codecpar->height, sar);
2887     }
2888
2889     /* open the streams */
2890     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
2891         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2892     }
2893
2894     ret = -1;
2895     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2896         ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2897     }
2898     if (is->show_mode == SHOW_MODE_NONE)
2899         is->show_mode = ret >= 0 ? SHOW_MODE_VIDEO : SHOW_MODE_RDFT;
2900
2901     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
2902         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2903     }
2904
2905     if (is->video_stream < 0 && is->audio_stream < 0) {
2906         av_log(NULL, AV_LOG_FATAL, "Failed to open file '%s' or configure filtergraph\n",
2907                is->filename);
2908         ret = -1;
2909         goto fail;
2910     }
2911
2912     if (infinite_buffer < 0 && is->realtime)
2913         infinite_buffer = 1;
2914
2915     for (;;) {
2916         if (is->abort_request)
2917             break;
2918         if (is->paused != is->last_paused) {
2919             is->last_paused = is->paused;
2920             if (is->paused)
2921                 is->read_pause_return = av_read_pause(ic);
2922             else
2923                 av_read_play(ic);
2924         }
2925 #if CONFIG_RTSP_DEMUXER || CONFIG_MMSH_PROTOCOL
2926         if (is->paused &&
2927                 (!strcmp(ic->iformat->name, "rtsp") ||
2928                  (ic->pb && !strncmp(input_filename, "mmsh:", 5)))) {
2929             /* wait 10 ms to avoid trying to get another packet */
2930             /* XXX: horrible */
2931             SDL_Delay(10);
2932             continue;
2933         }
2934 #endif
2935         if (is->seek_req) {
2936             int64_t seek_target = is->seek_pos;
2937             int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2938             int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2939 // FIXME the +-2 is due to rounding being not done in the correct direction in generation
2940 //      of the seek_pos/seek_rel variables
2941
2942             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2943             if (ret < 0) {
2944                 av_log(NULL, AV_LOG_ERROR,
2945                        "%s: error while seeking\n", is->ic->url);
2946             } else {
2947                 if (is->audio_stream >= 0) {
2948                     packet_queue_flush(&is->audioq);
2949                     packet_queue_put(&is->audioq, &flush_pkt);
2950                 }
2951                 if (is->subtitle_stream >= 0) {
2952                     packet_queue_flush(&is->subtitleq);
2953                     packet_queue_put(&is->subtitleq, &flush_pkt);
2954                 }
2955                 if (is->video_stream >= 0) {
2956                     packet_queue_flush(&is->videoq);
2957                     packet_queue_put(&is->videoq, &flush_pkt);
2958                 }
2959                 if (is->seek_flags & AVSEEK_FLAG_BYTE) {
2960                    set_clock(&is->extclk, NAN, 0);
2961                 } else {
2962                    set_clock(&is->extclk, seek_target / (double)AV_TIME_BASE, 0);
2963                 }
2964             }
2965             is->seek_req = 0;
2966             is->queue_attachments_req = 1;
2967             is->eof = 0;
2968             if (is->paused)
2969                 step_to_next_frame(is);
2970         }
2971         if (is->queue_attachments_req) {
2972             if (is->video_st && is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC) {
2973                 AVPacket copy = { 0 };
2974                 if ((ret = av_packet_ref(&copy, &is->video_st->attached_pic)) < 0)
2975                     goto fail;
2976                 packet_queue_put(&is->videoq, &copy);
2977                 packet_queue_put_nullpacket(&is->videoq, is->video_stream);
2978             }
2979             is->queue_attachments_req = 0;
2980         }
2981
2982         /* if the queue are full, no need to read more */
2983         if (infinite_buffer<1 &&
2984               (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2985             || (stream_has_enough_packets(is->audio_st, is->audio_stream, &is->audioq) &&
2986                 stream_has_enough_packets(is->video_st, is->video_stream, &is->videoq) &&
2987                 stream_has_enough_packets(is->subtitle_st, is->subtitle_stream, &is->subtitleq)))) {
2988             /* wait 10 ms */
2989             SDL_LockMutex(wait_mutex);
2990             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2991             SDL_UnlockMutex(wait_mutex);
2992             continue;
2993         }
2994         if (!is->paused &&
2995             (!is->audio_st || (is->auddec.finished == is->audioq.serial && frame_queue_nb_remaining(&is->sampq) == 0)) &&
2996             (!is->video_st || (is->viddec.finished == is->videoq.serial && frame_queue_nb_remaining(&is->pictq) == 0))) {
2997             if (loop != 1 && (!loop || --loop)) {
2998                 stream_seek(is, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
2999             } else if (autoexit) {
3000                 ret = AVERROR_EOF;
3001                 goto fail;
3002             }
3003         }
3004         ret = av_read_frame(ic, pkt);
3005         if (ret < 0) {
3006             if ((ret == AVERROR_EOF || avio_feof(ic->pb)) && !is->eof) {
3007                 if (is->video_stream >= 0)
3008                     packet_queue_put_nullpacket(&is->videoq, is->video_stream);
3009                 if (is->audio_stream >= 0)
3010                     packet_queue_put_nullpacket(&is->audioq, is->audio_stream);
3011                 if (is->subtitle_stream >= 0)
3012                     packet_queue_put_nullpacket(&is->subtitleq, is->subtitle_stream);
3013                 is->eof = 1;
3014             }
3015             if (ic->pb && ic->pb->error)
3016                 break;
3017             SDL_LockMutex(wait_mutex);
3018             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
3019             SDL_UnlockMutex(wait_mutex);
3020             continue;
3021         } else {
3022             is->eof = 0;
3023         }
3024         /* check if packet is in play range specified by user, then queue, otherwise discard */
3025         stream_start_time = ic->streams[pkt->stream_index]->start_time;
3026         pkt_ts = pkt->pts == AV_NOPTS_VALUE ? pkt->dts : pkt->pts;
3027         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
3028                 (pkt_ts - (stream_start_time != AV_NOPTS_VALUE ? stream_start_time : 0)) *
3029                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
3030                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
3031                 <= ((double)duration / 1000000);
3032         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
3033             packet_queue_put(&is->audioq, pkt);
3034         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range
3035                    && !(is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
3036             packet_queue_put(&is->videoq, pkt);
3037         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
3038             packet_queue_put(&is->subtitleq, pkt);
3039         } else {
3040             av_packet_unref(pkt);
3041         }
3042     }
3043
3044     ret = 0;
3045  fail:
3046     if (ic && !is->ic)
3047         avformat_close_input(&ic);
3048
3049     if (ret != 0) {
3050         SDL_Event event;
3051
3052         event.type = FF_QUIT_EVENT;
3053         event.user.data1 = is;
3054         SDL_PushEvent(&event);
3055     }
3056     SDL_DestroyMutex(wait_mutex);
3057     return 0;
3058 }
3059
3060 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
3061 {
3062     VideoState *is;
3063
3064     is = av_mallocz(sizeof(VideoState));
3065     if (!is)
3066         return NULL;
3067     is->filename = av_strdup(filename);
3068     if (!is->filename)
3069         goto fail;
3070     is->iformat = iformat;
3071     is->ytop    = 0;
3072     is->xleft   = 0;
3073
3074     /* start video display */
3075     if (frame_queue_init(&is->pictq, &is->videoq, VIDEO_PICTURE_QUEUE_SIZE, 1) < 0)
3076         goto fail;
3077     if (frame_queue_init(&is->subpq, &is->subtitleq, SUBPICTURE_QUEUE_SIZE, 0) < 0)
3078         goto fail;
3079     if (frame_queue_init(&is->sampq, &is->audioq, SAMPLE_QUEUE_SIZE, 1) < 0)
3080         goto fail;
3081
3082     if (packet_queue_init(&is->videoq) < 0 ||
3083         packet_queue_init(&is->audioq) < 0 ||
3084         packet_queue_init(&is->subtitleq) < 0)
3085         goto fail;
3086
3087     if (!(is->continue_read_thread = SDL_CreateCond())) {
3088         av_log(NULL, AV_LOG_FATAL, "SDL_CreateCond(): %s\n", SDL_GetError());
3089         goto fail;
3090     }
3091
3092     init_clock(&is->vidclk, &is->videoq.serial);
3093     init_clock(&is->audclk, &is->audioq.serial);
3094     init_clock(&is->extclk, &is->extclk.serial);
3095     is->audio_clock_serial = -1;
3096     if (startup_volume < 0)
3097         av_log(NULL, AV_LOG_WARNING, "-volume=%d < 0, setting to 0\n", startup_volume);
3098     if (startup_volume > 100)
3099         av_log(NULL, AV_LOG_WARNING, "-volume=%d > 100, setting to 100\n", startup_volume);
3100     startup_volume = av_clip(startup_volume, 0, 100);
3101     startup_volume = av_clip(SDL_MIX_MAXVOLUME * startup_volume / 100, 0, SDL_MIX_MAXVOLUME);
3102     is->audio_volume = startup_volume;
3103     is->muted = 0;
3104     is->av_sync_type = av_sync_type;
3105     is->read_tid     = SDL_CreateThread(read_thread, "read_thread", is);
3106     if (!is->read_tid) {
3107         av_log(NULL, AV_LOG_FATAL, "SDL_CreateThread(): %s\n", SDL_GetError());
3108 fail:
3109         stream_close(is);
3110         return NULL;
3111     }
3112     return is;
3113 }
3114
3115 static void stream_cycle_channel(VideoState *is, int codec_type)
3116 {
3117     AVFormatContext *ic = is->ic;
3118     int start_index, stream_index;
3119     int old_index;
3120     AVStream *st;
3121     AVProgram *p = NULL;
3122     int nb_streams = is->ic->nb_streams;
3123
3124     if (codec_type == AVMEDIA_TYPE_VIDEO) {
3125         start_index = is->last_video_stream;
3126         old_index = is->video_stream;
3127     } else if (codec_type == AVMEDIA_TYPE_AUDIO) {
3128         start_index = is->last_audio_stream;
3129         old_index = is->audio_stream;
3130     } else {
3131         start_index = is->last_subtitle_stream;
3132         old_index = is->subtitle_stream;
3133     }
3134     stream_index = start_index;
3135
3136     if (codec_type != AVMEDIA_TYPE_VIDEO && is->video_stream != -1) {
3137         p = av_find_program_from_stream(ic, NULL, is->video_stream);
3138         if (p) {
3139             nb_streams = p->nb_stream_indexes;
3140             for (start_index = 0; start_index < nb_streams; start_index++)
3141                 if (p->stream_index[start_index] == stream_index)
3142                     break;
3143             if (start_index == nb_streams)
3144                 start_index = -1;
3145             stream_index = start_index;
3146         }
3147     }
3148
3149     for (;;) {
3150         if (++stream_index >= nb_streams)
3151         {
3152             if (codec_type == AVMEDIA_TYPE_SUBTITLE)
3153             {
3154                 stream_index = -1;
3155                 is->last_subtitle_stream = -1;
3156                 goto the_end;
3157             }
3158             if (start_index == -1)
3159                 return;
3160             stream_index = 0;
3161         }
3162         if (stream_index == start_index)
3163             return;
3164         st = is->ic->streams[p ? p->stream_index[stream_index] : stream_index];
3165         if (st->codecpar->codec_type == codec_type) {
3166             /* check that parameters are OK */
3167             switch (codec_type) {
3168             case AVMEDIA_TYPE_AUDIO:
3169                 if (st->codecpar->sample_rate != 0 &&
3170                     st->codecpar->channels != 0)
3171                     goto the_end;
3172                 break;
3173             case AVMEDIA_TYPE_VIDEO:
3174             case AVMEDIA_TYPE_SUBTITLE:
3175                 goto the_end;
3176             default:
3177                 break;
3178             }
3179         }
3180     }
3181  the_end:
3182     if (p && stream_index != -1)
3183         stream_index = p->stream_index[stream_index];
3184     av_log(NULL, AV_LOG_INFO, "Switch %s stream from #%d to #%d\n",
3185            av_get_media_type_string(codec_type),
3186            old_index,
3187            stream_index);
3188
3189     stream_component_close(is, old_index);
3190     stream_component_open(is, stream_index);
3191 }
3192
3193
3194 static void toggle_full_screen(VideoState *is)
3195 {
3196     is_full_screen = !is_full_screen;
3197     SDL_SetWindowFullscreen(window, is_full_screen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
3198 }
3199
3200 static void toggle_audio_display(VideoState *is)
3201 {
3202     int next = is->show_mode;
3203     do {
3204         next = (next + 1) % SHOW_MODE_NB;
3205     } while (next != is->show_mode && (next == SHOW_MODE_VIDEO && !is->video_st || next != SHOW_MODE_VIDEO && !is->audio_st));
3206     if (is->show_mode != next) {
3207         is->force_refresh = 1;
3208         is->show_mode = next;
3209     }
3210 }
3211
3212 static void refresh_loop_wait_event(VideoState *is, SDL_Event *event) {
3213     double remaining_time = 0.0;
3214     SDL_PumpEvents();
3215     while (!SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_FIRSTEVENT, SDL_LASTEVENT)) {
3216         if (!cursor_hidden && av_gettime_relative() - cursor_last_shown > CURSOR_HIDE_DELAY) {
3217             SDL_ShowCursor(0);
3218             cursor_hidden = 1;
3219         }
3220         if (remaining_time > 0.0)
3221             av_usleep((int64_t)(remaining_time * 1000000.0));
3222         remaining_time = REFRESH_RATE;
3223         if (is->show_mode != SHOW_MODE_NONE && (!is->paused || is->force_refresh))
3224             video_refresh(is, &remaining_time);
3225         SDL_PumpEvents();
3226     }
3227 }
3228
3229 static void seek_chapter(VideoState *is, int incr)
3230 {
3231     int64_t pos = get_master_clock(is) * AV_TIME_BASE;
3232     int i;
3233
3234     if (!is->ic->nb_chapters)
3235         return;
3236
3237     /* find the current chapter */
3238     for (i = 0; i < is->ic->nb_chapters; i++) {
3239         AVChapter *ch = is->ic->chapters[i];
3240         if (av_compare_ts(pos, AV_TIME_BASE_Q, ch->start, ch->time_base) < 0) {
3241             i--;
3242             break;
3243         }
3244     }
3245
3246     i += incr;
3247     i = FFMAX(i, 0);
3248     if (i >= is->ic->nb_chapters)
3249         return;
3250
3251     av_log(NULL, AV_LOG_VERBOSE, "Seeking to chapter %d.\n", i);
3252     stream_seek(is, av_rescale_q(is->ic->chapters[i]->start, is->ic->chapters[i]->time_base,
3253                                  AV_TIME_BASE_Q), 0, 0);
3254 }
3255
3256 /* handle an event sent by the GUI */
3257 static void event_loop(VideoState *cur_stream)
3258 {
3259     SDL_Event event;
3260     double incr, pos, frac;
3261
3262     for (;;) {
3263         double x;
3264         refresh_loop_wait_event(cur_stream, &event);
3265         switch (event.type) {
3266         case SDL_KEYDOWN:
3267             if (exit_on_keydown || event.key.keysym.sym == SDLK_ESCAPE || event.key.keysym.sym == SDLK_q) {
3268                 do_exit(cur_stream);
3269                 break;
3270             }
3271             // If we don't yet have a window, skip all key events, because read_thread might still be initializing...
3272             if (!cur_stream->width)
3273                 continue;
3274             switch (event.key.keysym.sym) {
3275             case SDLK_f:
3276                 toggle_full_screen(cur_stream);
3277                 cur_stream->force_refresh = 1;
3278                 break;
3279             case SDLK_p:
3280             case SDLK_SPACE:
3281                 toggle_pause(cur_stream);
3282                 break;
3283             case SDLK_m:
3284                 toggle_mute(cur_stream);
3285                 break;
3286             case SDLK_KP_MULTIPLY:
3287             case SDLK_0:
3288                 update_volume(cur_stream, 1, SDL_VOLUME_STEP);
3289                 break;
3290             case SDLK_KP_DIVIDE:
3291             case SDLK_9:
3292                 update_volume(cur_stream, -1, SDL_VOLUME_STEP);
3293                 break;
3294             case SDLK_s: // S: Step to next frame
3295                 step_to_next_frame(cur_stream);
3296                 break;
3297             case SDLK_a:
3298                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3299                 break;
3300             case SDLK_v:
3301                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3302                 break;
3303             case SDLK_c:
3304                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3305                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3306                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3307                 break;
3308             case SDLK_t:
3309                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3310                 break;
3311             case SDLK_w:
3312 #if CONFIG_AVFILTER
3313                 if (cur_stream->show_mode == SHOW_MODE_VIDEO && cur_stream->vfilter_idx < nb_vfilters - 1) {
3314                     if (++cur_stream->vfilter_idx >= nb_vfilters)
3315                         cur_stream->vfilter_idx = 0;
3316                 } else {
3317                     cur_stream->vfilter_idx = 0;
3318                     toggle_audio_display(cur_stream);
3319                 }
3320 #else
3321                 toggle_audio_display(cur_stream);
3322 #endif
3323                 break;
3324             case SDLK_PAGEUP:
3325                 if (cur_stream->ic->nb_chapters <= 1) {
3326                     incr = 600.0;
3327                     goto do_seek;
3328                 }
3329                 seek_chapter(cur_stream, 1);
3330                 break;
3331             case SDLK_PAGEDOWN:
3332                 if (cur_stream->ic->nb_chapters <= 1) {
3333                     incr = -600.0;
3334                     goto do_seek;
3335                 }
3336                 seek_chapter(cur_stream, -1);
3337                 break;
3338             case SDLK_LEFT:
3339                 incr = seek_interval ? -seek_interval : -10.0;
3340                 goto do_seek;
3341             case SDLK_RIGHT:
3342                 incr = seek_interval ? seek_interval : 10.0;
3343                 goto do_seek;
3344             case SDLK_UP:
3345                 incr = 60.0;
3346                 goto do_seek;
3347             case SDLK_DOWN:
3348                 incr = -60.0;
3349             do_seek:
3350                     if (seek_by_bytes) {
3351                         pos = -1;
3352                         if (pos < 0 && cur_stream->video_stream >= 0)
3353                             pos = frame_queue_last_pos(&cur_stream->pictq);
3354                         if (pos < 0 && cur_stream->audio_stream >= 0)
3355                             pos = frame_queue_last_pos(&cur_stream->sampq);
3356                         if (pos < 0)
3357                             pos = avio_tell(cur_stream->ic->pb);
3358                         if (cur_stream->ic->bit_rate)
3359                             incr *= cur_stream->ic->bit_rate / 8.0;
3360                         else
3361                             incr *= 180000.0;
3362                         pos += incr;
3363                         stream_seek(cur_stream, pos, incr, 1);
3364                     } else {
3365                         pos = get_master_clock(cur_stream);
3366                         if (isnan(pos))
3367                             pos = (double)cur_stream->seek_pos / AV_TIME_BASE;
3368                         pos += incr;
3369                         if (cur_stream->ic->start_time != AV_NOPTS_VALUE && pos < cur_stream->ic->start_time / (double)AV_TIME_BASE)
3370                             pos = cur_stream->ic->start_time / (double)AV_TIME_BASE;
3371                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
3372                     }
3373                 break;
3374             default:
3375                 break;
3376             }
3377             break;
3378         case SDL_MOUSEBUTTONDOWN:
3379             if (exit_on_mousedown) {
3380                 do_exit(cur_stream);
3381                 break;
3382             }
3383             if (event.button.button == SDL_BUTTON_LEFT) {
3384                 static int64_t last_mouse_left_click = 0;
3385                 if (av_gettime_relative() - last_mouse_left_click <= 500000) {
3386                     toggle_full_screen(cur_stream);
3387                     cur_stream->force_refresh = 1;
3388                     last_mouse_left_click = 0;
3389                 } else {
3390                     last_mouse_left_click = av_gettime_relative();
3391                 }
3392             }
3393         case SDL_MOUSEMOTION:
3394             if (cursor_hidden) {
3395                 SDL_ShowCursor(1);
3396                 cursor_hidden = 0;
3397             }
3398             cursor_last_shown = av_gettime_relative();
3399             if (event.type == SDL_MOUSEBUTTONDOWN) {
3400                 if (event.button.button != SDL_BUTTON_RIGHT)
3401                     break;
3402                 x = event.button.x;
3403             } else {
3404                 if (!(event.motion.state & SDL_BUTTON_RMASK))
3405                     break;
3406                 x = event.motion.x;
3407             }
3408                 if (seek_by_bytes || cur_stream->ic->duration <= 0) {
3409                     uint64_t size =  avio_size(cur_stream->ic->pb);
3410                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
3411                 } else {
3412                     int64_t ts;
3413                     int ns, hh, mm, ss;
3414                     int tns, thh, tmm, tss;
3415                     tns  = cur_stream->ic->duration / 1000000LL;
3416                     thh  = tns / 3600;
3417                     tmm  = (tns % 3600) / 60;
3418                     tss  = (tns % 60);
3419                     frac = x / cur_stream->width;
3420                     ns   = frac * tns;
3421                     hh   = ns / 3600;
3422                     mm   = (ns % 3600) / 60;
3423                     ss   = (ns % 60);
3424                     av_log(NULL, AV_LOG_INFO,
3425                            "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
3426                             hh, mm, ss, thh, tmm, tss);
3427                     ts = frac * cur_stream->ic->duration;
3428                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
3429                         ts += cur_stream->ic->start_time;
3430                     stream_seek(cur_stream, ts, 0, 0);
3431                 }
3432             break;
3433         case SDL_WINDOWEVENT:
3434             switch (event.window.event) {
3435                 case SDL_WINDOWEVENT_RESIZED:
3436                     screen_width  = cur_stream->width  = event.window.data1;
3437                     screen_height = cur_stream->height = event.window.data2;
3438                     if (cur_stream->vis_texture) {
3439                         SDL_DestroyTexture(cur_stream->vis_texture);
3440                         cur_stream->vis_texture = NULL;
3441                     }
3442                 case SDL_WINDOWEVENT_EXPOSED:
3443                     cur_stream->force_refresh = 1;
3444             }
3445             break;
3446         case SDL_QUIT:
3447         case FF_QUIT_EVENT:
3448             do_exit(cur_stream);
3449             break;
3450         default:
3451             break;
3452         }
3453     }
3454 }
3455
3456 static int opt_frame_size(void *optctx, const char *opt, const char *arg)
3457 {
3458     av_log(NULL, AV_LOG_WARNING, "Option -s is deprecated, use -video_size.\n");
3459     return opt_default(NULL, "video_size", arg);
3460 }
3461
3462 static int opt_width(void *optctx, const char *opt, const char *arg)
3463 {
3464     screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3465     return 0;
3466 }
3467
3468 static int opt_height(void *optctx, const char *opt, const char *arg)
3469 {
3470     screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3471     return 0;
3472 }
3473
3474 static int opt_format(void *optctx, const char *opt, const char *arg)
3475 {
3476     file_iformat = av_find_input_format(arg);
3477     if (!file_iformat) {
3478         av_log(NULL, AV_LOG_FATAL, "Unknown input format: %s\n", arg);
3479         return AVERROR(EINVAL);
3480     }
3481     return 0;
3482 }
3483
3484 static int opt_frame_pix_fmt(void *optctx, const char *opt, const char *arg)
3485 {
3486     av_log(NULL, AV_LOG_WARNING, "Option -pix_fmt is deprecated, use -pixel_format.\n");
3487     return opt_default(NULL, "pixel_format", arg);
3488 }
3489
3490 static int opt_sync(void *optctx, const char *opt, const char *arg)
3491 {
3492     if (!strcmp(arg, "audio"))
3493         av_sync_type = AV_SYNC_AUDIO_MASTER;
3494     else if (!strcmp(arg, "video"))
3495         av_sync_type = AV_SYNC_VIDEO_MASTER;
3496     else if (!strcmp(arg, "ext"))
3497         av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
3498     else {
3499         av_log(NULL, AV_LOG_ERROR, "Unknown value for %s: %s\n", opt, arg);
3500         exit(1);
3501     }
3502     return 0;
3503 }
3504
3505 static int opt_seek(void *optctx, const char *opt, const char *arg)
3506 {
3507     start_time = parse_time_or_die(opt, arg, 1);
3508     return 0;
3509 }
3510
3511 static int opt_duration(void *optctx, const char *opt, const char *arg)
3512 {
3513     duration = parse_time_or_die(opt, arg, 1);
3514     return 0;
3515 }
3516
3517 static int opt_show_mode(void *optctx, const char *opt, const char *arg)
3518 {
3519     show_mode = !strcmp(arg, "video") ? SHOW_MODE_VIDEO :
3520                 !strcmp(arg, "waves") ? SHOW_MODE_WAVES :
3521                 !strcmp(arg, "rdft" ) ? SHOW_MODE_RDFT  :
3522                 parse_number_or_die(opt, arg, OPT_INT, 0, SHOW_MODE_NB-1);
3523     return 0;
3524 }
3525
3526 static void opt_input_file(void *optctx, const char *filename)
3527 {
3528     if (input_filename) {
3529         av_log(NULL, AV_LOG_FATAL,
3530                "Argument '%s' provided as input filename, but '%s' was already specified.\n",
3531                 filename, input_filename);
3532         exit(1);
3533     }
3534     if (!strcmp(filename, "-"))
3535         filename = "pipe:";
3536     input_filename = filename;
3537 }
3538
3539 static int opt_codec(void *optctx, const char *opt, const char *arg)
3540 {
3541    const char *spec = strchr(opt, ':');
3542    if (!spec) {
3543        av_log(NULL, AV_LOG_ERROR,
3544               "No media specifier was specified in '%s' in option '%s'\n",
3545                arg, opt);
3546        return AVERROR(EINVAL);
3547    }
3548    spec++;
3549    switch (spec[0]) {
3550    case 'a' :    audio_codec_name = arg; break;
3551    case 's' : subtitle_codec_name = arg; break;
3552    case 'v' :    video_codec_name = arg; break;
3553    default:
3554        av_log(NULL, AV_LOG_ERROR,
3555               "Invalid media specifier '%s' in option '%s'\n", spec, opt);
3556        return AVERROR(EINVAL);
3557    }
3558    return 0;
3559 }
3560
3561 static int dummy;
3562
3563 static const OptionDef options[] = {
3564     CMDUTILS_COMMON_OPTIONS
3565     { "x", HAS_ARG, { .func_arg = opt_width }, "force displayed width", "width" },
3566     { "y", HAS_ARG, { .func_arg = opt_height }, "force displayed height", "height" },
3567     { "s", HAS_ARG | OPT_VIDEO, { .func_arg = opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
3568     { "fs", OPT_BOOL, { &is_full_screen }, "force full screen" },
3569     { "an", OPT_BOOL, { &audio_disable }, "disable audio" },
3570     { "vn", OPT_BOOL, { &video_disable }, "disable video" },
3571     { "sn", OPT_BOOL, { &subtitle_disable }, "disable subtitling" },
3572     { "ast", OPT_STRING | HAS_ARG | OPT_EXPERT, { &wanted_stream_spec[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_specifier" },
3573     { "vst", OPT_STRING | HAS_ARG | OPT_EXPERT, { &wanted_stream_spec[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_specifier" },
3574     { "sst", OPT_STRING | HAS_ARG | OPT_EXPERT, { &wanted_stream_spec[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_specifier" },
3575     { "ss", HAS_ARG, { .func_arg = opt_seek }, "seek to a given position in seconds", "pos" },
3576     { "t", HAS_ARG, { .func_arg = opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
3577     { "bytes", OPT_INT | HAS_ARG, { &seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
3578     { "seek_interval", OPT_FLOAT | HAS_ARG, { &seek_interval }, "set seek interval for left/right keys, in seconds", "seconds" },
3579     { "nodisp", OPT_BOOL, { &display_disable }, "disable graphical display" },
3580     { "noborder", OPT_BOOL, { &borderless }, "borderless window" },
3581     { "volume", OPT_INT | HAS_ARG, { &startup_volume}, "set startup volume 0=min 100=max", "volume" },
3582     { "f", HAS_ARG, { .func_arg = opt_format }, "force format", "fmt" },
3583     { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_frame_pix_fmt }, "set pixel format", "format" },
3584     { "stats", OPT_BOOL | OPT_EXPERT, { &show_status }, "show status", "" },
3585     { "fast", OPT_BOOL | OPT_EXPERT, { &fast }, "non spec compliant optimizations", "" },
3586     { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
3587     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
3588     { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, { &lowres }, "", "" },
3589     { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
3590     { "autoexit", OPT_BOOL | OPT_EXPERT, { &autoexit }, "exit at the end", "" },
3591     { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { &exit_on_keydown }, "exit on key down", "" },
3592     { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { &exit_on_mousedown }, "exit on mouse down", "" },
3593     { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { &loop }, "set number of times the playback shall be looped", "loop count" },
3594     { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
3595     { "infbuf", OPT_BOOL | OPT_EXPERT, { &infinite_buffer }, "don't limit the input buffer size (useful with realtime streams)", "" },
3596     { "window_title", OPT_STRING | HAS_ARG, { &window_title }, "set window title", "window title" },
3597     { "left", OPT_INT | HAS_ARG | OPT_EXPERT, { &screen_left }, "set the x position for the left of the window", "x pos" },
3598     { "top", OPT_INT | HAS_ARG | OPT_EXPERT, { &screen_top }, "set the y position for the top of the window", "y pos" },
3599 #if CONFIG_AVFILTER
3600     { "vf", OPT_EXPERT | HAS_ARG, { .func_arg = opt_add_vfilter }, "set video filters", "filter_graph" },
3601     { "af", OPT_STRING | HAS_ARG, { &afilters }, "set audio filters", "filter_graph" },
3602 #endif
3603     { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { &rdftspeed }, "rdft speed", "msecs" },
3604     { "showmode", HAS_ARG, { .func_arg = opt_show_mode}, "select show mode (0 = video, 1 = waves, 2 = RDFT)", "mode" },
3605     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { .func_arg = opt_default }, "generic catch all option", "" },
3606     { "i", OPT_BOOL, { &dummy}, "read specified file", "input_file"},
3607     { "codec", HAS_ARG, { .func_arg = opt_codec}, "force decoder", "decoder_name" },
3608     { "acodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &audio_codec_name }, "force audio decoder",    "decoder_name" },
3609     { "scodec", HAS_ARG | OPT_STRING | OPT_EXPERT, { &subtitle_codec_name }, "force subtitle decoder", "decoder_name" },
3610     { "vcodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &video_codec_name }, "force video decoder",    "decoder_name" },
3611     { "autorotate", OPT_BOOL, { &autorotate }, "automatically rotate video", "" },
3612     { "find_stream_info", OPT_BOOL | OPT_INPUT | OPT_EXPERT, { &find_stream_info },
3613         "read and decode the streams to fill missing information with heuristics" },
3614     { NULL, },
3615 };
3616
3617 static void show_usage(void)
3618 {
3619     av_log(NULL, AV_LOG_INFO, "Simple media player\n");
3620     av_log(NULL, AV_LOG_INFO, "usage: %s [options] input_file\n", program_name);
3621     av_log(NULL, AV_LOG_INFO, "\n");
3622 }
3623
3624 void show_help_default(const char *opt, const char *arg)
3625 {
3626     av_log_set_callback(log_callback_help);
3627     show_usage();
3628     show_help_options(options, "Main options:", 0, OPT_EXPERT, 0);
3629     show_help_options(options, "Advanced options:", OPT_EXPERT, 0, 0);
3630     printf("\n");
3631     show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3632     show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3633 #if !CONFIG_AVFILTER
3634     show_help_children(sws_get_class(), AV_OPT_FLAG_ENCODING_PARAM);
3635 #else
3636     show_help_children(avfilter_get_class(), AV_OPT_FLAG_FILTERING_PARAM);
3637 #endif
3638     printf("\nWhile playing:\n"
3639            "q, ESC              quit\n"
3640            "f                   toggle full screen\n"
3641            "p, SPC              pause\n"
3642            "m                   toggle mute\n"
3643            "9, 0                decrease and increase volume respectively\n"
3644            "/, *                decrease and increase volume respectively\n"
3645            "a                   cycle audio channel in the current program\n"
3646            "v                   cycle video channel\n"
3647            "t                   cycle subtitle channel in the current program\n"
3648            "c                   cycle program\n"
3649            "w                   cycle video filters or show modes\n"
3650            "s                   activate frame-step mode\n"
3651            "left/right          seek backward/forward 10 seconds or to custom interval if -seek_interval is set\n"
3652            "down/up             seek backward/forward 1 minute\n"
3653            "page down/page up   seek backward/forward 10 minutes\n"
3654            "right mouse click   seek to percentage in file corresponding to fraction of width\n"
3655            "left double-click   toggle full screen\n"
3656            );
3657 }
3658
3659 /* Called from the main */
3660 int main(int argc, char **argv)
3661 {
3662     int flags;
3663     VideoState *is;
3664
3665     init_dynload();
3666
3667     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3668     parse_loglevel(argc, argv, options);
3669
3670     /* register all codecs, demux and protocols */
3671 #if CONFIG_AVDEVICE
3672     avdevice_register_all();
3673 #endif
3674     avformat_network_init();
3675
3676     init_opts();
3677
3678     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
3679     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
3680
3681     show_banner(argc, argv, options);
3682
3683     parse_options(NULL, argc, argv, options, opt_input_file);
3684
3685     if (!input_filename) {
3686         show_usage();
3687         av_log(NULL, AV_LOG_FATAL, "An input file must be specified\n");
3688         av_log(NULL, AV_LOG_FATAL,
3689                "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3690         exit(1);
3691     }
3692
3693     if (display_disable) {
3694         video_disable = 1;
3695     }
3696     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
3697     if (audio_disable)
3698         flags &= ~SDL_INIT_AUDIO;
3699     else {
3700         /* Try to work around an occasional ALSA buffer underflow issue when the
3701          * period size is NPOT due to ALSA resampling by forcing the buffer size. */
3702         if (!SDL_getenv("SDL_AUDIO_ALSA_SET_BUFFER_SIZE"))
3703             SDL_setenv("SDL_AUDIO_ALSA_SET_BUFFER_SIZE","1", 1);
3704     }
3705     if (display_disable)
3706         flags &= ~SDL_INIT_VIDEO;
3707     if (SDL_Init (flags)) {
3708         av_log(NULL, AV_LOG_FATAL, "Could not initialize SDL - %s\n", SDL_GetError());
3709         av_log(NULL, AV_LOG_FATAL, "(Did you set the DISPLAY variable?)\n");
3710         exit(1);
3711     }
3712
3713     SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
3714     SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
3715
3716     av_init_packet(&flush_pkt);
3717     flush_pkt.data = (uint8_t *)&flush_pkt;
3718
3719     if (!display_disable) {
3720         int flags = SDL_WINDOW_HIDDEN;
3721         if (borderless)
3722             flags |= SDL_WINDOW_BORDERLESS;
3723         else
3724             flags |= SDL_WINDOW_RESIZABLE;
3725         window = SDL_CreateWindow(program_name, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, default_width, default_height, flags);
3726         SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
3727         if (window) {
3728             renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
3729             if (!renderer) {
3730                 av_log(NULL, AV_LOG_WARNING, "Failed to initialize a hardware accelerated renderer: %s\n", SDL_GetError());
3731                 renderer = SDL_CreateRenderer(window, -1, 0);
3732             }
3733             if (renderer) {
3734                 if (!SDL_GetRendererInfo(renderer, &renderer_info))
3735                     av_log(NULL, AV_LOG_VERBOSE, "Initialized %s renderer.\n", renderer_info.name);
3736             }
3737         }
3738         if (!window || !renderer || !renderer_info.num_texture_formats) {
3739             av_log(NULL, AV_LOG_FATAL, "Failed to create window or renderer: %s", SDL_GetError());
3740             do_exit(NULL);
3741         }
3742     }
3743
3744     is = stream_open(input_filename, file_iformat);
3745     if (!is) {
3746         av_log(NULL, AV_LOG_FATAL, "Failed to initialize VideoState!\n");
3747         do_exit(NULL);
3748     }
3749
3750     event_loop(is);
3751
3752     /* never returns */
3753
3754     return 0;
3755 }