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 audio_disable;
 318 static int video_disable;
 319 static int subtitle_disable;
 320 static const char* wanted_stream_spec[AVMEDIA_TYPE_NB] = {0};
 321 static int seek_by_bytes = -1;
 322 static int display_disable;
 323 static int borderless;
 324 static int startup_volume = 100;
 325 static int show_status = 1;
 326 static int av_sync_type = AV_SYNC_AUDIO_MASTER;
 327 static int64_t start_time = AV_NOPTS_VALUE;
 328 static int64_t duration = AV_NOPTS_VALUE;
 329 static int fast = 0;
 330 static int genpts = 0;
 331 static int lowres = 0;
 332 static int decoder_reorder_pts = -1;
 333 static int autoexit;
 334 static int exit_on_keydown;
 335 static int exit_on_mousedown;
 336 static int loop = 1;
 337 static int framedrop = -1;
 338 static int infinite_buffer = -1;
 339 static enum ShowMode show_mode = SHOW_MODE_NONE;
 340 static const char *audio_codec_name;
 341 static const char *subtitle_codec_name;
 342 static const char *video_codec_name;
 343 double rdftspeed = 0.02;
 344 static int64_t cursor_last_shown;
 345 static int cursor_hidden = 0;
 346 #if CONFIG_AVFILTER
 347 static const char **vfilters_list = NULL;
 348 static int nb_vfilters = 0;
 349 static char *afilters = NULL;
 350 #endif
 351 static int autorotate = 1;
 352 static int find_stream_info = 1;
 353
 354 /* current context */
 355 static int is_full_screen;
 356 static int64_t audio_callback_time;
 357
 358 static AVPacket flush_pkt;
 359
 360 #define FF_QUIT_EVENT    (SDL_USEREVENT + 2)
 361
 362 static SDL_Window *window;
 363 static SDL_Renderer *renderer;
 364 static SDL_RendererInfo renderer_info = {0};
 365 static SDL_AudioDeviceID audio_dev;
 366
 367 static const struct TextureFormatEntry {
 368     enum AVPixelFormat format;
 369     int texture_fmt;
 370 } sdl_texture_format_map[] = {
 371     { AV_PIX_FMT_RGB8,           SDL_PIXELFORMAT_RGB332 },
 372     { AV_PIX_FMT_RGB444,         SDL_PIXELFORMAT_RGB444 },
 373     { AV_PIX_FMT_RGB555,         SDL_PIXELFORMAT_RGB555 },
 374     { AV_PIX_FMT_BGR555,         SDL_PIXELFORMAT_BGR555 },
 375     { AV_PIX_FMT_RGB565,         SDL_PIXELFORMAT_RGB565 },
 376     { AV_PIX_FMT_BGR565,         SDL_PIXELFORMAT_BGR565 },
 377     { AV_PIX_FMT_RGB24,          SDL_PIXELFORMAT_RGB24 },
 378     { AV_PIX_FMT_BGR24,          SDL_PIXELFORMAT_BGR24 },
 379     { AV_PIX_FMT_0RGB32,         SDL_PIXELFORMAT_RGB888 },
 380     { AV_PIX_FMT_0BGR32,         SDL_PIXELFORMAT_BGR888 },
 381     { AV_PIX_FMT_NE(RGB0, 0BGR), SDL_PIXELFORMAT_RGBX8888 },
 382     { AV_PIX_FMT_NE(BGR0, 0RGB), SDL_PIXELFORMAT_BGRX8888 },
 383     { AV_PIX_FMT_RGB32,          SDL_PIXELFORMAT_ARGB8888 },
 384     { AV_PIX_FMT_RGB32_1,        SDL_PIXELFORMAT_RGBA8888 },
 385     { AV_PIX_FMT_BGR32,          SDL_PIXELFORMAT_ABGR8888 },
 386     { AV_PIX_FMT_BGR32_1,        SDL_PIXELFORMAT_BGRA8888 },
 387     { AV_PIX_FMT_YUV420P,        SDL_PIXELFORMAT_IYUV },
 388     { AV_PIX_FMT_YUYV422,        SDL_PIXELFORMAT_YUY2 },
 389     { AV_PIX_FMT_UYVY422,        SDL_PIXELFORMAT_UYVY },
 390     { AV_PIX_FMT_NONE,           SDL_PIXELFORMAT_UNKNOWN },
 391 };
 392
 393 #if CONFIG_AVFILTER
 394 static int opt_add_vfilter(void *optctx, const char *opt, const char *arg)
 395 {
 396     GROW_ARRAY(vfilters_list, nb_vfilters);
 397     vfilters_list[nb_vfilters - 1] = arg;
 398     return 0;
 399 }
 400 #endif
 401
 402 static inline
 403 int cmp_audio_fmts(enum AVSampleFormat fmt1, int64_t channel_count1,
 404                    enum AVSampleFormat fmt2, int64_t channel_count2)
 405 {
 406     /* If channel count == 1, planar and non-planar formats are the same */
 407     if (channel_count1 == 1 && channel_count2 == 1)
 408         return av_get_packed_sample_fmt(fmt1) != av_get_packed_sample_fmt(fmt2);
 409     else
 410         return channel_count1 != channel_count2 || fmt1 != fmt2;
 411 }
 412
 413 static inline
 414 int64_t get_valid_channel_layout(int64_t channel_layout, int channels)
 415 {
 416     if (channel_layout && av_get_channel_layout_nb_channels(channel_layout) == channels)
 417         return channel_layout;
 418     else
 419         return 0;
 420 }
 421
 422 static int packet_queue_put_private(PacketQueue *q, AVPacket *pkt)
 423 {
 424     MyAVPacketList *pkt1;
 425
 426     if (q->abort_request)
 427        return -1;
 428
 429     pkt1 = av_malloc(sizeof(MyAVPacketList));
 430     if (!pkt1)
 431         return -1;
 432     pkt1->pkt = *pkt;
 433     pkt1->next = NULL;
 434     if (pkt == &flush_pkt)
 435         q->serial++;
 436     pkt1->serial = q->serial;
 437
 438     if (!q->last_pkt)
 439         q->first_pkt = pkt1;
 440     else
 441         q->last_pkt->next = pkt1;
 442     q->last_pkt = pkt1;
 443     q->nb_packets++;
 444     q->size += pkt1->pkt.size + sizeof(*pkt1);
 445     q->duration += pkt1->pkt.duration;
 446     /* XXX: should duplicate packet data in DV case */
 447     SDL_CondSignal(q->cond);
 448     return 0;
 449 }
 450
 451 static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
 452 {
 453     int ret;
 454
 455     SDL_LockMutex(q->mutex);
 456     ret = packet_queue_put_private(q, pkt);
 457     SDL_UnlockMutex(q->mutex);
 458
 459     if (pkt != &flush_pkt && ret < 0)
 460         av_packet_unref(pkt);
 461
 462     return ret;
 463 }
 464
 465 static int packet_queue_put_nullpacket(PacketQueue *q, int stream_index)
 466 {
 467     AVPacket pkt1, *pkt = &pkt1;
 468     av_init_packet(pkt);
 469     pkt->data = NULL;
 470     pkt->size = 0;
 471     pkt->stream_index = stream_index;
 472     return packet_queue_put(q, pkt);
 473 }
 474
 475 /* packet queue handling */
 476 static int packet_queue_init(PacketQueue *q)
 477 {
 478     memset(q, 0, sizeof(PacketQueue));
 479     q->mutex = SDL_CreateMutex();
 480     if (!q->mutex) {
 481         av_log(NULL, AV_LOG_FATAL, "SDL_CreateMutex(): %s\n", SDL_GetError());
 482         return AVERROR(ENOMEM);
 483     }
 484     q->cond = SDL_CreateCond();
 485     if (!q->cond) {
 486         av_log(NULL, AV_LOG_FATAL, "SDL_CreateCond(): %s\n", SDL_GetError());
 487         return AVERROR(ENOMEM);
 488     }
 489     q->abort_request = 1;
 490     return 0;
 491 }
 492
 493 static void packet_queue_flush(PacketQueue *q)
 494 {
 495     MyAVPacketList *pkt, *pkt1;
 496
 497     SDL_LockMutex(q->mutex);
 498     for (pkt = q->first_pkt; pkt; pkt = pkt1) {
 499         pkt1 = pkt->next;
 500         av_packet_unref(&pkt->pkt);
 501         av_freep(&pkt);
 502     }
 503     q->last_pkt = NULL;
 504     q->first_pkt = NULL;
 505     q->nb_packets = 0;
 506     q->size = 0;
 507     q->duration = 0;
 508     SDL_UnlockMutex(q->mutex);
 509 }
 510
 511 static void packet_queue_destroy(PacketQueue *q)
 512 {
 513     packet_queue_flush(q);
 514     SDL_DestroyMutex(q->mutex);
 515     SDL_DestroyCond(q->cond);
 516 }
 517
 518 static void packet_queue_abort(PacketQueue *q)
 519 {
 520     SDL_LockMutex(q->mutex);
 521
 522     q->abort_request = 1;
 523
 524     SDL_CondSignal(q->cond);
 525
 526     SDL_UnlockMutex(q->mutex);
 527 }
 528
 529 static void packet_queue_start(PacketQueue *q)
 530 {
 531     SDL_LockMutex(q->mutex);
 532     q->abort_request = 0;
 533     packet_queue_put_private(q, &flush_pkt);
 534     SDL_UnlockMutex(q->mutex);
 535 }
 536
 537 /* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
 538 static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block, int *serial)
 539 {
 540     MyAVPacketList *pkt1;
 541     int ret;
 542
 543     SDL_LockMutex(q->mutex);
 544
 545     for (;;) {
 546         if (q->abort_request) {
 547             ret = -1;
 548             break;
 549         }
 550
 551         pkt1 = q->first_pkt;
 552         if (pkt1) {
 553             q->first_pkt = pkt1->next;
 554             if (!q->first_pkt)
 555                 q->last_pkt = NULL;
 556             q->nb_packets--;
 557             q->size -= pkt1->pkt.size + sizeof(*pkt1);
 558             q->duration -= pkt1->pkt.duration;
 559             *pkt = pkt1->pkt;
 560             if (serial)
 561                 *serial = pkt1->serial;
 562             av_free(pkt1);
 563             ret = 1;
 564             break;
 565         } else if (!block) {
 566             ret = 0;
 567             break;
 568         } else {
 569             SDL_CondWait(q->cond, q->mutex);
 570         }
 571     }
 572     SDL_UnlockMutex(q->mutex);
 573     return ret;
 574 }
 575
 576 static void decoder_init(Decoder *d, AVCodecContext *avctx, PacketQueue *queue, SDL_cond *empty_queue_cond) {
 577     memset(d, 0, sizeof(Decoder));
 578     d->avctx = avctx;
 579     d->queue = queue;
 580     d->empty_queue_cond = empty_queue_cond;
 581     d->start_pts = AV_NOPTS_VALUE;
 582     d->pkt_serial = -1;
 583 }
 584
 585 static int decoder_decode_frame(Decoder *d, AVFrame *frame, AVSubtitle *sub) {
 586     int ret = AVERROR(EAGAIN);
 587
 588     for (;;) {
 589         AVPacket pkt;
 590
 591         if (d->queue->serial == d->pkt_serial) {
 592             do {
 593                 if (d->queue->abort_request)
 594                     return -1;
 595
 596                 switch (d->avctx->codec_type) {
 597                     case AVMEDIA_TYPE_VIDEO:
 598                         ret = avcodec_receive_frame(d->avctx, frame);
 599                         if (ret >= 0) {
 600                             if (decoder_reorder_pts == -1) {
 601                                 frame->pts = frame->best_effort_timestamp;
 602                             } else if (!decoder_reorder_pts) {
 603                                 frame->pts = frame->pkt_dts;
 604                             }
 605                         }
 606                         break;
 607                     case AVMEDIA_TYPE_AUDIO:
 608                         ret = avcodec_receive_frame(d->avctx, frame);
 609                         if (ret >= 0) {
 610                             AVRational tb = (AVRational){1, frame->sample_rate};
 611                             if (frame->pts != AV_NOPTS_VALUE)
 612                                 frame->pts = av_rescale_q(frame->pts, d->avctx->pkt_timebase, tb);
 613                             else if (d->next_pts != AV_NOPTS_VALUE)
 614                                 frame->pts = av_rescale_q(d->next_pts, d->next_pts_tb, tb);
 615                             if (frame->pts != AV_NOPTS_VALUE) {
 616                                 d->next_pts = frame->pts + frame->nb_samples;
 617                                 d->next_pts_tb = tb;
 618                             }
 619                         }
 620                         break;
 621                 }
 622                 if (ret == AVERROR_EOF) {
 623                     d->finished = d->pkt_serial;
 624                     avcodec_flush_buffers(d->avctx);
 625                     return 0;
 626                 }
 627                 if (ret >= 0)
 628                     return 1;
 629             } while (ret != AVERROR(EAGAIN));
 630         }
 631
 632         do {
 633             if (d->queue->nb_packets == 0)
 634                 SDL_CondSignal(d->empty_queue_cond);
 635             if (d->packet_pending) {
 636                 av_packet_move_ref(&pkt, &d->pkt);
 637                 d->packet_pending = 0;
 638             } else {
 639                 if (packet_queue_get(d->queue, &pkt, 1, &d->pkt_serial) < 0)
 640                     return -1;
 641             }
 642         } while (d->queue->serial != d->pkt_serial);
 643
 644         if (pkt.data == flush_pkt.data) {
 645             avcodec_flush_buffers(d->avctx);
 646             d->finished = 0;
 647             d->next_pts = d->start_pts;
 648             d->next_pts_tb = d->start_pts_tb;
 649         } else {
 650             if (d->avctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
 651                 int got_frame = 0;
 652                 ret = avcodec_decode_subtitle2(d->avctx, sub, &got_frame, &pkt);
 653                 if (ret < 0) {
 654                     ret = AVERROR(EAGAIN);
 655                 } else {
 656                     if (got_frame && !pkt.data) {
 657                        d->packet_pending = 1;
 658                        av_packet_move_ref(&d->pkt, &pkt);
 659                     }
 660                     ret = got_frame ? 0 : (pkt.data ? AVERROR(EAGAIN) : AVERROR_EOF);
 661                 }
 662             } else {
 663                 if (avcodec_send_packet(d->avctx, &pkt) == AVERROR(EAGAIN)) {
 664                     av_log(d->avctx, AV_LOG_ERROR, "Receive_frame and send_packet both returned EAGAIN, which is an API violation.\n");
 665                     d->packet_pending = 1;
 666                     av_packet_move_ref(&d->pkt, &pkt);
 667                 }
 668             }
 669             av_packet_unref(&pkt);
 670         }
 671     }
 672 }
 673
 674 static void decoder_destroy(Decoder *d) {
 675     av_packet_unref(&d->pkt);
 676     avcodec_free_context(&d->avctx);
 677 }
 678
 679 static void frame_queue_unref_item(Frame *vp)
 680 {
 681     av_frame_unref(vp->frame);
 682     avsubtitle_free(&vp->sub);
 683 }
 684
 685 static int frame_queue_init(FrameQueue *f, PacketQueue *pktq, int max_size, int keep_last)
 686 {
 687     int i;
 688     memset(f, 0, sizeof(FrameQueue));
 689     if (!(f->mutex = SDL_CreateMutex())) {
 690         av_log(NULL, AV_LOG_FATAL, "SDL_CreateMutex(): %s\n", SDL_GetError());
 691         return AVERROR(ENOMEM);
 692     }
 693     if (!(f->cond = SDL_CreateCond())) {
 694         av_log(NULL, AV_LOG_FATAL, "SDL_CreateCond(): %s\n", SDL_GetError());
 695         return AVERROR(ENOMEM);
 696     }
 697     f->pktq = pktq;
 698     f->max_size = FFMIN(max_size, FRAME_QUEUE_SIZE);
 699     f->keep_last = !!keep_last;
 700     for (i = 0; i < f->max_size; i++)
 701         if (!(f->queue[i].frame = av_frame_alloc()))
 702             return AVERROR(ENOMEM);
 703     return 0;
 704 }
 705
 706 static void frame_queue_destory(FrameQueue *f)
 707 {
 708     int i;
 709     for (i = 0; i < f->max_size; i++) {
 710         Frame *vp = &f->queue[i];
 711         frame_queue_unref_item(vp);
 712         av_frame_free(&vp->frame);
 713     }
 714     SDL_DestroyMutex(f->mutex);
 715     SDL_DestroyCond(f->cond);
 716 }
 717
 718 static void frame_queue_signal(FrameQueue *f)
 719 {
 720     SDL_LockMutex(f->mutex);
 721     SDL_CondSignal(f->cond);
 722     SDL_UnlockMutex(f->mutex);
 723 }
 724
 725 static Frame *frame_queue_peek(FrameQueue *f)
 726 {
 727     return &f->queue[(f->rindex + f->rindex_shown) % f->max_size];
 728 }
 729
 730 static Frame *frame_queue_peek_next(FrameQueue *f)
 731 {
 732     return &f->queue[(f->rindex + f->rindex_shown + 1) % f->max_size];
 733 }
 734
 735 static Frame *frame_queue_peek_last(FrameQueue *f)
 736 {
 737     return &f->queue[f->rindex];
 738 }
 739
 740 static Frame *frame_queue_peek_writable(FrameQueue *f)
 741 {
 742     /* wait until we have space to put a new frame */
 743     SDL_LockMutex(f->mutex);
 744     while (f->size >= f->max_size &&
 745            !f->pktq->abort_request) {
 746         SDL_CondWait(f->cond, f->mutex);
 747     }
 748     SDL_UnlockMutex(f->mutex);
 749
 750     if (f->pktq->abort_request)
 751         return NULL;
 752
 753     return &f->queue[f->windex];
 754 }
 755
 756 static Frame *frame_queue_peek_readable(FrameQueue *f)
 757 {
 758     /* wait until we have a readable a new frame */
 759     SDL_LockMutex(f->mutex);
 760     while (f->size - f->rindex_shown <= 0 &&
 761            !f->pktq->abort_request) {
 762         SDL_CondWait(f->cond, f->mutex);
 763     }
 764     SDL_UnlockMutex(f->mutex);
 765
 766     if (f->pktq->abort_request)
 767         return NULL;
 768
 769     return &f->queue[(f->rindex + f->rindex_shown) % f->max_size];
 770 }
 771
 772 static void frame_queue_push(FrameQueue *f)
 773 {
 774     if (++f->windex == f->max_size)
 775         f->windex = 0;
 776     SDL_LockMutex(f->mutex);
 777     f->size++;
 778     SDL_CondSignal(f->cond);
 779     SDL_UnlockMutex(f->mutex);
 780 }
 781
 782 static void frame_queue_next(FrameQueue *f)
 783 {
 784     if (f->keep_last && !f->rindex_shown) {
 785         f->rindex_shown = 1;
 786         return;
 787     }
 788     frame_queue_unref_item(&f->queue[f->rindex]);
 789     if (++f->rindex == f->max_size)
 790         f->rindex = 0;
 791     SDL_LockMutex(f->mutex);
 792     f->size--;
 793     SDL_CondSignal(f->cond);
 794     SDL_UnlockMutex(f->mutex);
 795 }
 796
 797 /* return the number of undisplayed frames in the queue */
 798 static int frame_queue_nb_remaining(FrameQueue *f)
 799 {
 800     return f->size - f->rindex_shown;
 801 }
 802
 803 /* return last shown position */
 804 static int64_t frame_queue_last_pos(FrameQueue *f)
 805 {
 806     Frame *fp = &f->queue[f->rindex];
 807     if (f->rindex_shown && fp->serial == f->pktq->serial)
 808         return fp->pos;
 809     else
 810         return -1;
 811 }
 812
 813 static void decoder_abort(Decoder *d, FrameQueue *fq)
 814 {
 815     packet_queue_abort(d->queue);
 816     frame_queue_signal(fq);
 817     SDL_WaitThread(d->decoder_tid, NULL);
 818     d->decoder_tid = NULL;
 819     packet_queue_flush(d->queue);
 820 }
 821
 822 static inline void fill_rectangle(int x, int y, int w, int h)
 823 {
 824     SDL_Rect rect;
 825     rect.x = x;
 826     rect.y = y;
 827     rect.w = w;
 828     rect.h = h;
 829     if (w && h)
 830         SDL_RenderFillRect(renderer, &rect);
 831 }
 832
 833 static int realloc_texture(SDL_Texture **texture, Uint32 new_format, int new_width, int new_height, SDL_BlendMode blendmode, int init_texture)
 834 {
 835     Uint32 format;
 836     int access, w, h;
 837     if (!*texture || SDL_QueryTexture(*texture, &format, &access, &w, &h) < 0 || new_width != w || new_height != h || new_format != format) {
 838         void *pixels;
 839         int pitch;
 840         if (*texture)
 841             SDL_DestroyTexture(*texture);
 842         if (!(*texture = SDL_CreateTexture(renderer, new_format, SDL_TEXTUREACCESS_STREAMING, new_width, new_height)))
 843             return -1;
 844         if (SDL_SetTextureBlendMode(*texture, blendmode) < 0)
 845             return -1;
 846         if (init_texture) {
 847             if (SDL_LockTexture(*texture, NULL, &pixels, &pitch) < 0)
 848                 return -1;
 849             memset(pixels, 0, pitch * new_height);
 850             SDL_UnlockTexture(*texture);
 851         }
 852         av_log(NULL, AV_LOG_VERBOSE, "Created %dx%d texture with %s.\n", new_width, new_height, SDL_GetPixelFormatName(new_format));
 853     }
 854     return 0;
 855 }
 856
 857 static void calculate_display_rect(SDL_Rect *rect,
 858                                    int scr_xleft, int scr_ytop, int scr_width, int scr_height,
 859                                    int pic_width, int pic_height, AVRational pic_sar)
 860 {
 861     float aspect_ratio;
 862     int width, height, x, y;
 863
 864     if (pic_sar.num == 0)
 865         aspect_ratio = 0;
 866     else
 867         aspect_ratio = av_q2d(pic_sar);
 868
 869     if (aspect_ratio <= 0.0)
 870         aspect_ratio = 1.0;
 871     aspect_ratio *= (float)pic_width / (float)pic_height;
 872
 873     /* XXX: we suppose the screen has a 1.0 pixel ratio */
 874     height = scr_height;
 875     width = lrint(height * aspect_ratio) & ~1;
 876     if (width > scr_width) {
 877         width = scr_width;
 878         height = lrint(width / aspect_ratio) & ~1;
 879     }
 880     x = (scr_width - width) / 2;
 881     y = (scr_height - height) / 2;
 882     rect->x = scr_xleft + x;
 883     rect->y = scr_ytop  + y;
 884     rect->w = FFMAX(width,  1);
 885     rect->h = FFMAX(height, 1);
 886 }
 887
 888 static void get_sdl_pix_fmt_and_blendmode(int format, Uint32 *sdl_pix_fmt, SDL_BlendMode *sdl_blendmode)
 889 {
 890     int i;
 891     *sdl_blendmode = SDL_BLENDMODE_NONE;
 892     *sdl_pix_fmt = SDL_PIXELFORMAT_UNKNOWN;
 893     if (format == AV_PIX_FMT_RGB32   ||
 894         format == AV_PIX_FMT_RGB32_1 ||
 895         format == AV_PIX_FMT_BGR32   ||
 896         format == AV_PIX_FMT_BGR32_1)
 897         *sdl_blendmode = SDL_BLENDMODE_BLEND;
 898     for (i = 0; i < FF_ARRAY_ELEMS(sdl_texture_format_map) - 1; i++) {
 899         if (format == sdl_texture_format_map[i].format) {
 900             *sdl_pix_fmt = sdl_texture_format_map[i].texture_fmt;
 901             return;
 902         }
 903     }
 904 }
 905
 906 static int upload_texture(SDL_Texture **tex, AVFrame *frame, struct SwsContext **img_convert_ctx) {
 907     int ret = 0;
 908     Uint32 sdl_pix_fmt;
 909     SDL_BlendMode sdl_blendmode;
 910     get_sdl_pix_fmt_and_blendmode(frame->format, &sdl_pix_fmt, &sdl_blendmode);
 911     if (realloc_texture(tex, sdl_pix_fmt == SDL_PIXELFORMAT_UNKNOWN ? SDL_PIXELFORMAT_ARGB8888 : sdl_pix_fmt, frame->width, frame->height, sdl_blendmode, 0) < 0)
 912         return -1;
 913     switch (sdl_pix_fmt) {
 914         case SDL_PIXELFORMAT_UNKNOWN:
 915             /* This should only happen if we are not using avfilter... */
 916             *img_convert_ctx = sws_getCachedContext(*img_convert_ctx,
 917                 frame->width, frame->height, frame->format, frame->width, frame->height,
 918                 AV_PIX_FMT_BGRA, sws_flags, NULL, NULL, NULL);
 919             if (*img_convert_ctx != NULL) {
 920                 uint8_t *pixels[4];
 921                 int pitch[4];
 922                 if (!SDL_LockTexture(*tex, NULL, (void **)pixels, pitch)) {
 923                     sws_scale(*img_convert_ctx, (const uint8_t * const *)frame->data, frame->linesize,
 924                               0, frame->height, pixels, pitch);
 925                     SDL_UnlockTexture(*tex);
 926                 }
 927             } else {
 928                 av_log(NULL, AV_LOG_FATAL, "Cannot initialize the conversion context\n");
 929                 ret = -1;
 930             }
 931             break;
 932         case SDL_PIXELFORMAT_IYUV:
 933             if (frame->linesize[0] > 0 && frame->linesize[1] > 0 && frame->linesize[2] > 0) {
 934                 ret = SDL_UpdateYUVTexture(*tex, NULL, frame->data[0], frame->linesize[0],
 935                                                        frame->data[1], frame->linesize[1],
 936                                                        frame->data[2], frame->linesize[2]);
 937             } else if (frame->linesize[0] < 0 && frame->linesize[1] < 0 && frame->linesize[2] < 0) {
 938                 ret = SDL_UpdateYUVTexture(*tex, NULL, frame->data[0] + frame->linesize[0] * (frame->height                    - 1), -frame->linesize[0],
 939                                                        frame->data[1] + frame->linesize[1] * (AV_CEIL_RSHIFT(frame->height, 1) - 1), -frame->linesize[1],
 940                                                        frame->data[2] + frame->linesize[2] * (AV_CEIL_RSHIFT(frame->height, 1) - 1), -frame->linesize[2]);
 941             } else {
 942                 av_log(NULL, AV_LOG_ERROR, "Mixed negative and positive linesizes are not supported.\n");
 943                 return -1;
 944             }
 945             break;
 946         default:
 947             if (frame->linesize[0] < 0) {
 948                 ret = SDL_UpdateTexture(*tex, NULL, frame->data[0] + frame->linesize[0] * (frame->height - 1), -frame->linesize[0]);
 949             } else {
 950                 ret = SDL_UpdateTexture(*tex, NULL, frame->data[0], frame->linesize[0]);
 951             }
 952             break;
 953     }
 954     return ret;
 955 }
 956
 957 static void set_sdl_yuv_conversion_mode(AVFrame *frame)
 958 {
 959 #if SDL_VERSION_ATLEAST(2,0,8)
 960     SDL_YUV_CONVERSION_MODE mode = SDL_YUV_CONVERSION_AUTOMATIC;
 961     if (frame && (frame->format == AV_PIX_FMT_YUV420P || frame->format == AV_PIX_FMT_YUYV422 || frame->format == AV_PIX_FMT_UYVY422)) {
 962         if (frame->color_range == AVCOL_RANGE_JPEG)
 963             mode = SDL_YUV_CONVERSION_JPEG;
 964         else if (frame->colorspace == AVCOL_SPC_BT709)
 965             mode = SDL_YUV_CONVERSION_BT709;
 966         else if (frame->colorspace == AVCOL_SPC_BT470BG || frame->colorspace == AVCOL_SPC_SMPTE170M || frame->colorspace == AVCOL_SPC_SMPTE240M)
 967             mode = SDL_YUV_CONVERSION_BT601;
 968     }
 969     SDL_SetYUVConversionMode(mode);
 970 #endif
 971 }
 972
 973 static void video_image_display(VideoState *is)
 974 {
 975     Frame *vp;
 976     Frame *sp = NULL;
 977     SDL_Rect rect;
 978
 979     vp = frame_queue_peek_last(&is->pictq);
 980     if (is->subtitle_st) {
 981         if (frame_queue_nb_remaining(&is->subpq) > 0) {
 982             sp = frame_queue_peek(&is->subpq);
 983
 984             if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000)) {
 985                 if (!sp->uploaded) {
 986                     uint8_t* pixels[4];
 987                     int pitch[4];
 988                     int i;
 989                     if (!sp->width || !sp->height) {
 990                         sp->width = vp->width;
 991                         sp->height = vp->height;
 992                     }
 993                     if (realloc_texture(&is->sub_texture, SDL_PIXELFORMAT_ARGB8888, sp->width, sp->height, SDL_BLENDMODE_BLEND, 1) < 0)
 994                         return;
 995
 996                     for (i = 0; i < sp->sub.num_rects; i++) {
 997                         AVSubtitleRect *sub_rect = sp->sub.rects[i];
 998
 999                         sub_rect->x = av_clip(sub_rect->x, 0, sp->width );
1000                         sub_rect->y = av_clip(sub_rect->y, 0, sp->height);
1001                         sub_rect->w = av_clip(sub_rect->w, 0, sp->width  - sub_rect->x);
1002                         sub_rect->h = av_clip(sub_rect->h, 0, sp->height - sub_rect->y);
1003
1004                         is->sub_convert_ctx = sws_getCachedContext(is->sub_convert_ctx,
1005                             sub_rect->w, sub_rect->h, AV_PIX_FMT_PAL8,
1006                             sub_rect->w, sub_rect->h, AV_PIX_FMT_BGRA,
1007                             0, NULL, NULL, NULL);
1008                         if (!is->sub_convert_ctx) {
1009                             av_log(NULL, AV_LOG_FATAL, "Cannot initialize the conversion context\n");
1010                             return;
1011                         }
1012                         if (!SDL_LockTexture(is->sub_texture, (SDL_Rect *)sub_rect, (void **)pixels, pitch)) {
1013                             sws_scale(is->sub_convert_ctx, (const uint8_t * const *)sub_rect->data, sub_rect->linesize,
1014                                       0, sub_rect->h, pixels, pitch);
1015                             SDL_UnlockTexture(is->sub_texture);
1016                         }
1017                     }
1018                     sp->uploaded = 1;
1019                 }
1020             } else
1021                 sp = NULL;
1022         }
1023     }
1024
1025     calculate_display_rect(&rect, is->xleft, is->ytop, is->width, is->height, vp->width, vp->height, vp->sar);
1026
1027     if (!vp->uploaded) {
1028         if (upload_texture(&is->vid_texture, vp->frame, &is->img_convert_ctx) < 0)
1029             return;
1030         vp->uploaded = 1;
1031         vp->flip_v = vp->frame->linesize[0] < 0;
1032     }
1033
1034     set_sdl_yuv_conversion_mode(vp->frame);
1035     SDL_RenderCopyEx(renderer, is->vid_texture, NULL, &rect, 0, NULL, vp->flip_v ? SDL_FLIP_VERTICAL : 0);
1036     set_sdl_yuv_conversion_mode(NULL);
1037     if (sp) {
1038 #if USE_ONEPASS_SUBTITLE_RENDER
1039         SDL_RenderCopy(renderer, is->sub_texture, NULL, &rect);
1040 #else
1041         int i;
1042         double xratio = (double)rect.w / (double)sp->width;
1043         double yratio = (double)rect.h / (double)sp->height;
1044         for (i = 0; i < sp->sub.num_rects; i++) {
1045             SDL_Rect *sub_rect = (SDL_Rect*)sp->sub.rects[i];
1046             SDL_Rect target = {.x = rect.x + sub_rect->x * xratio,
1047                                .y = rect.y + sub_rect->y * yratio,
1048                                .w = sub_rect->w * xratio,
1049                                .h = sub_rect->h * yratio};
1050             SDL_RenderCopy(renderer, is->sub_texture, sub_rect, &target);
1051         }
1052 #endif
1053     }
1054 }
1055
1056 static inline int compute_mod(int a, int b)
1057 {
1058     return a < 0 ? a%b + b : a%b;
1059 }
1060
1061 static void video_audio_display(VideoState *s)
1062 {
1063     int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
1064     int ch, channels, h, h2;
1065     int64_t time_diff;
1066     int rdft_bits, nb_freq;
1067
1068     for (rdft_bits = 1; (1 << rdft_bits) < 2 * s->height; rdft_bits++)
1069         ;
1070     nb_freq = 1 << (rdft_bits - 1);
1071
1072     /* compute display index : center on currently output samples */
1073     channels = s->audio_tgt.channels;
1074     nb_display_channels = channels;
1075     if (!s->paused) {
1076         int data_used= s->show_mode == SHOW_MODE_WAVES ? s->width : (2*nb_freq);
1077         n = 2 * channels;
1078         delay = s->audio_write_buf_size;
1079         delay /= n;
1080
1081         /* to be more precise, we take into account the time spent since
1082            the last buffer computation */
1083         if (audio_callback_time) {
1084             time_diff = av_gettime_relative() - audio_callback_time;
1085             delay -= (time_diff * s->audio_tgt.freq) / 1000000;
1086         }
1087
1088         delay += 2 * data_used;
1089         if (delay < data_used)
1090             delay = data_used;
1091
1092         i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
1093         if (s->show_mode == SHOW_MODE_WAVES) {
1094             h = INT_MIN;
1095             for (i = 0; i < 1000; i += channels) {
1096                 int idx = (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
1097                 int a = s->sample_array[idx];
1098                 int b = s->sample_array[(idx + 4 * channels) % SAMPLE_ARRAY_SIZE];
1099                 int c = s->sample_array[(idx + 5 * channels) % SAMPLE_ARRAY_SIZE];
1100                 int d = s->sample_array[(idx + 9 * channels) % SAMPLE_ARRAY_SIZE];
1101                 int score = a - d;
1102                 if (h < score && (b ^ c) < 0) {
1103                     h = score;
1104                     i_start = idx;
1105                 }
1106             }
1107         }
1108
1109         s->last_i_start = i_start;
1110     } else {
1111         i_start = s->last_i_start;
1112     }
1113
1114     if (s->show_mode == SHOW_MODE_WAVES) {
1115         SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
1116
1117         /* total height for one channel */
1118         h = s->height / nb_display_channels;
1119         /* graph height / 2 */
1120         h2 = (h * 9) / 20;
1121         for (ch = 0; ch < nb_display_channels; ch++) {
1122             i = i_start + ch;
1123             y1 = s->ytop + ch * h + (h / 2); /* position of center line */
1124             for (x = 0; x < s->width; x++) {
1125                 y = (s->sample_array[i] * h2) >> 15;
1126                 if (y < 0) {
1127                     y = -y;
1128                     ys = y1 - y;
1129                 } else {
1130                     ys = y1;
1131                 }
1132                 fill_rectangle(s->xleft + x, ys, 1, y);
1133                 i += channels;
1134                 if (i >= SAMPLE_ARRAY_SIZE)
1135                     i -= SAMPLE_ARRAY_SIZE;
1136             }
1137         }
1138
1139         SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255);
1140
1141         for (ch = 1; ch < nb_display_channels; ch++) {
1142             y = s->ytop + ch * h;
1143             fill_rectangle(s->xleft, y, s->width, 1);
1144         }
1145     } else {
1146         if (realloc_texture(&s->vis_texture, SDL_PIXELFORMAT_ARGB8888, s->width, s->height, SDL_BLENDMODE_NONE, 1) < 0)
1147             return;
1148
1149         nb_display_channels= FFMIN(nb_display_channels, 2);
1150         if (rdft_bits != s->rdft_bits) {
1151             av_rdft_end(s->rdft);
1152             av_free(s->rdft_data);
1153             s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
1154             s->rdft_bits = rdft_bits;
1155             s->rdft_data = av_malloc_array(nb_freq, 4 *sizeof(*s->rdft_data));
1156         }
1157         if (!s->rdft || !s->rdft_data){
1158             av_log(NULL, AV_LOG_ERROR, "Failed to allocate buffers for RDFT, switching to waves display\n");
1159             s->show_mode = SHOW_MODE_WAVES;
1160         } else {
1161             FFTSample *data[2];
1162             SDL_Rect rect = {.x = s->xpos, .y = 0, .w = 1, .h = s->height};
1163             uint32_t *pixels;
1164             int pitch;
1165             for (ch = 0; ch < nb_display_channels; ch++) {
1166                 data[ch] = s->rdft_data + 2 * nb_freq * ch;
1167                 i = i_start + ch;
1168                 for (x = 0; x < 2 * nb_freq; x++) {
1169                     double w = (x-nb_freq) * (1.0 / nb_freq);
1170                     data[ch][x] = s->sample_array[i] * (1.0 - w * w);
1171                     i += channels;
1172                     if (i >= SAMPLE_ARRAY_SIZE)
1173                         i -= SAMPLE_ARRAY_SIZE;
1174                 }
1175                 av_rdft_calc(s->rdft, data[ch]);
1176             }
1177             /* Least efficient way to do this, we should of course
1178              * directly access it but it is more than fast enough. */
1179             if (!SDL_LockTexture(s->vis_texture, &rect, (void **)&pixels, &pitch)) {
1180                 pitch >>= 2;
1181                 pixels += pitch * s->height;
1182                 for (y = 0; y < s->height; y++) {
1183                     double w = 1 / sqrt(nb_freq);
1184                     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]));
1185                     int b = (nb_display_channels == 2 ) ? sqrt(w * hypot(data[1][2 * y + 0], data[1][2 * y + 1]))
1186                                                         : a;
1187                     a = FFMIN(a, 255);
1188                     b = FFMIN(b, 255);
1189                     pixels -= pitch;
1190                     *pixels = (a << 16) + (b << 8) + ((a+b) >> 1);
1191                 }
1192                 SDL_UnlockTexture(s->vis_texture);
1193             }
1194             SDL_RenderCopy(renderer, s->vis_texture, NULL, NULL);
1195         }
1196         if (!s->paused)
1197             s->xpos++;
1198         if (s->xpos >= s->width)
1199             s->xpos= s->xleft;
1200     }
1201 }
1202
1203 static void stream_component_close(VideoState *is, int stream_index)
1204 {
1205     AVFormatContext *ic = is->ic;
1206     AVCodecParameters *codecpar;
1207
1208     if (stream_index < 0 || stream_index >= ic->nb_streams)
1209         return;
1210     codecpar = ic->streams[stream_index]->codecpar;
1211
1212     switch (codecpar->codec_type) {
1213     case AVMEDIA_TYPE_AUDIO:
1214         decoder_abort(&is->auddec, &is->sampq);
1215         SDL_CloseAudioDevice(audio_dev);
1216         decoder_destroy(&is->auddec);
1217         swr_free(&is->swr_ctx);
1218         av_freep(&is->audio_buf1);
1219         is->audio_buf1_size = 0;
1220         is->audio_buf = NULL;
1221
1222         if (is->rdft) {
1223             av_rdft_end(is->rdft);
1224             av_freep(&is->rdft_data);
1225             is->rdft = NULL;
1226             is->rdft_bits = 0;
1227         }
1228         break;
1229     case AVMEDIA_TYPE_VIDEO:
1230         decoder_abort(&is->viddec, &is->pictq);
1231         decoder_destroy(&is->viddec);
1232         break;
1233     case AVMEDIA_TYPE_SUBTITLE:
1234         decoder_abort(&is->subdec, &is->subpq);
1235         decoder_destroy(&is->subdec);
1236         break;
1237     default:
1238         break;
1239     }
1240
1241     ic->streams[stream_index]->discard = AVDISCARD_ALL;
1242     switch (codecpar->codec_type) {
1243     case AVMEDIA_TYPE_AUDIO:
1244         is->audio_st = NULL;
1245         is->audio_stream = -1;
1246         break;
1247     case AVMEDIA_TYPE_VIDEO:
1248         is->video_st = NULL;
1249         is->video_stream = -1;
1250         break;
1251     case AVMEDIA_TYPE_SUBTITLE:
1252         is->subtitle_st = NULL;
1253         is->subtitle_stream = -1;
1254         break;
1255     default:
1256         break;
1257     }
1258 }
1259
1260 static void stream_close(VideoState *is)
1261 {
1262     /* XXX: use a special url_shutdown call to abort parse cleanly */
1263     is->abort_request = 1;
1264     SDL_WaitThread(is->read_tid, NULL);
1265
1266     /* close each stream */
1267     if (is->audio_stream >= 0)
1268         stream_component_close(is, is->audio_stream);
1269     if (is->video_stream >= 0)
1270         stream_component_close(is, is->video_stream);
1271     if (is->subtitle_stream >= 0)
1272         stream_component_close(is, is->subtitle_stream);
1273
1274     avformat_close_input(&is->ic);
1275
1276     packet_queue_destroy(&is->videoq);
1277     packet_queue_destroy(&is->audioq);
1278     packet_queue_destroy(&is->subtitleq);
1279
1280     /* free all pictures */
1281     frame_queue_destory(&is->pictq);
1282     frame_queue_destory(&is->sampq);
1283     frame_queue_destory(&is->subpq);
1284     SDL_DestroyCond(is->continue_read_thread);
1285     sws_freeContext(is->img_convert_ctx);
1286     sws_freeContext(is->sub_convert_ctx);
1287     av_free(is->filename);
1288     if (is->vis_texture)
1289         SDL_DestroyTexture(is->vis_texture);
1290     if (is->vid_texture)
1291         SDL_DestroyTexture(is->vid_texture);
1292     if (is->sub_texture)
1293         SDL_DestroyTexture(is->sub_texture);
1294     av_free(is);
1295 }
1296
1297 static void do_exit(VideoState *is)
1298 {
1299     if (is) {
1300         stream_close(is);
1301     }
1302     if (renderer)
1303         SDL_DestroyRenderer(renderer);
1304     if (window)
1305         SDL_DestroyWindow(window);
1306     uninit_opts();
1307 #if CONFIG_AVFILTER
1308     av_freep(&vfilters_list);
1309 #endif
1310     avformat_network_deinit();
1311     if (show_status)
1312         printf("\n");
1313     SDL_Quit();
1314     av_log(NULL, AV_LOG_QUIET, "%s", "");
1315     exit(0);
1316 }
1317
1318 static void sigterm_handler(int sig)
1319 {
1320     exit(123);
1321 }
1322
1323 static void set_default_window_size(int width, int height, AVRational sar)
1324 {
1325     SDL_Rect rect;
1326     calculate_display_rect(&rect, 0, 0, INT_MAX, height, width, height, sar);
1327     default_width  = rect.w;
1328     default_height = rect.h;
1329 }
1330
1331 static int video_open(VideoState *is)
1332 {
1333     int w,h;
1334
1335     if (screen_width) {
1336         w = screen_width;
1337         h = screen_height;
1338     } else {
1339         w = default_width;
1340         h = default_height;
1341     }
1342
1343     if (!window_title)
1344         window_title = input_filename;
1345     SDL_SetWindowTitle(window, window_title);
1346
1347     SDL_SetWindowSize(window, w, h);
1348     SDL_SetWindowPosition(window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);
1349     if (is_full_screen)
1350         SDL_SetWindowFullscreen(window, SDL_WINDOW_FULLSCREEN_DESKTOP);
1351     SDL_ShowWindow(window);
1352
1353     is->width  = w;
1354     is->height = h;
1355
1356     return 0;
1357 }
1358
1359 /* display the current picture, if any */
1360 static void video_display(VideoState *is)
1361 {
1362     if (!is->width)
1363         video_open(is);
1364
1365     SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
1366     SDL_RenderClear(renderer);
1367     if (is->audio_st && is->show_mode != SHOW_MODE_VIDEO)
1368         video_audio_display(is);
1369     else if (is->video_st)
1370         video_image_display(is);
1371     SDL_RenderPresent(renderer);
1372 }
1373
1374 static double get_clock(Clock *c)
1375 {
1376     if (*c->queue_serial != c->serial)
1377         return NAN;
1378     if (c->paused) {
1379         return c->pts;
1380     } else {
1381         double time = av_gettime_relative() / 1000000.0;
1382         return c->pts_drift + time - (time - c->last_updated) * (1.0 - c->speed);
1383     }
1384 }
1385
1386 static void set_clock_at(Clock *c, double pts, int serial, double time)
1387 {
1388     c->pts = pts;
1389     c->last_updated = time;
1390     c->pts_drift = c->pts - time;
1391     c->serial = serial;
1392 }
1393
1394 static void set_clock(Clock *c, double pts, int serial)
1395 {
1396     double time = av_gettime_relative() / 1000000.0;
1397     set_clock_at(c, pts, serial, time);
1398 }
1399
1400 static void set_clock_speed(Clock *c, double speed)
1401 {
1402     set_clock(c, get_clock(c), c->serial);
1403     c->speed = speed;
1404 }
1405
1406 static void init_clock(Clock *c, int *queue_serial)
1407 {
1408     c->speed = 1.0;
1409     c->paused = 0;
1410     c->queue_serial = queue_serial;
1411     set_clock(c, NAN, -1);
1412 }
1413
1414 static void sync_clock_to_slave(Clock *c, Clock *slave)
1415 {
1416     double clock = get_clock(c);
1417     double slave_clock = get_clock(slave);
1418     if (!isnan(slave_clock) && (isnan(clock) || fabs(clock - slave_clock) > AV_NOSYNC_THRESHOLD))
1419         set_clock(c, slave_clock, slave->serial);
1420 }
1421
1422 static int get_master_sync_type(VideoState *is) {
1423     if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
1424         if (is->video_st)
1425             return AV_SYNC_VIDEO_MASTER;
1426         else
1427             return AV_SYNC_AUDIO_MASTER;
1428     } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
1429         if (is->audio_st)
1430             return AV_SYNC_AUDIO_MASTER;
1431         else
1432             return AV_SYNC_EXTERNAL_CLOCK;
1433     } else {
1434         return AV_SYNC_EXTERNAL_CLOCK;
1435     }
1436 }
1437
1438 /* get the current master clock value */
1439 static double get_master_clock(VideoState *is)
1440 {
1441     double val;
1442
1443     switch (get_master_sync_type(is)) {
1444         case AV_SYNC_VIDEO_MASTER:
1445             val = get_clock(&is->vidclk);
1446             break;
1447         case AV_SYNC_AUDIO_MASTER:
1448             val = get_clock(&is->audclk);
1449             break;
1450         default:
1451             val = get_clock(&is->extclk);
1452             break;
1453     }
1454     return val;
1455 }
1456
1457 static void check_external_clock_speed(VideoState *is) {
1458    if (is->video_stream >= 0 && is->videoq.nb_packets <= EXTERNAL_CLOCK_MIN_FRAMES ||
1459        is->audio_stream >= 0 && is->audioq.nb_packets <= EXTERNAL_CLOCK_MIN_FRAMES) {
1460        set_clock_speed(&is->extclk, FFMAX(EXTERNAL_CLOCK_SPEED_MIN, is->extclk.speed - EXTERNAL_CLOCK_SPEED_STEP));
1461    } else if ((is->video_stream < 0 || is->videoq.nb_packets > EXTERNAL_CLOCK_MAX_FRAMES) &&
1462               (is->audio_stream < 0 || is->audioq.nb_packets > EXTERNAL_CLOCK_MAX_FRAMES)) {
1463        set_clock_speed(&is->extclk, FFMIN(EXTERNAL_CLOCK_SPEED_MAX, is->extclk.speed + EXTERNAL_CLOCK_SPEED_STEP));
1464    } else {
1465        double speed = is->extclk.speed;
1466        if (speed != 1.0)
1467            set_clock_speed(&is->extclk, speed + EXTERNAL_CLOCK_SPEED_STEP * (1.0 - speed) / fabs(1.0 - speed));
1468    }
1469 }
1470
1471 /* seek in the stream */
1472 static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_bytes)
1473 {
1474     if (!is->seek_req) {
1475         is->seek_pos = pos;
1476         is->seek_rel = rel;
1477         is->seek_flags &= ~AVSEEK_FLAG_BYTE;
1478         if (seek_by_bytes)
1479             is->seek_flags |= AVSEEK_FLAG_BYTE;
1480         is->seek_req = 1;
1481         SDL_CondSignal(is->continue_read_thread);
1482     }
1483 }
1484
1485 /* pause or resume the video */
1486 static void stream_toggle_pause(VideoState *is)
1487 {
1488     if (is->paused) {
1489         is->frame_timer += av_gettime_relative() / 1000000.0 - is->vidclk.last_updated;
1490         if (is->read_pause_return != AVERROR(ENOSYS)) {
1491             is->vidclk.paused = 0;
1492         }
1493         set_clock(&is->vidclk, get_clock(&is->vidclk), is->vidclk.serial);
1494     }
1495     set_clock(&is->extclk, get_clock(&is->extclk), is->extclk.serial);
1496     is->paused = is->audclk.paused = is->vidclk.paused = is->extclk.paused = !is->paused;
1497 }
1498
1499 static void toggle_pause(VideoState *is)
1500 {
1501     stream_toggle_pause(is);
1502     is->step = 0;
1503 }
1504
1505 static void toggle_mute(VideoState *is)
1506 {
1507     is->muted = !is->muted;
1508 }
1509
1510 static void update_volume(VideoState *is, int sign, double step)
1511 {
1512     double volume_level = is->audio_volume ? (20 * log(is->audio_volume / (double)SDL_MIX_MAXVOLUME) / log(10)) : -1000.0;
1513     int new_volume = lrint(SDL_MIX_MAXVOLUME * pow(10.0, (volume_level + sign * step) / 20.0));
1514     is->audio_volume = av_clip(is->audio_volume == new_volume ? (is->audio_volume + sign) : new_volume, 0, SDL_MIX_MAXVOLUME);
1515 }
1516
1517 static void step_to_next_frame(VideoState *is)
1518 {
1519     /* if the stream is paused unpause it, then step */
1520     if (is->paused)
1521         stream_toggle_pause(is);
1522     is->step = 1;
1523 }
1524
1525 static double compute_target_delay(double delay, VideoState *is)
1526 {
1527     double sync_threshold, diff = 0;
1528
1529     /* update delay to follow master synchronisation source */
1530     if (get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER) {
1531         /* if video is slave, we try to correct big delays by
1532            duplicating or deleting a frame */
1533         diff = get_clock(&is->vidclk) - get_master_clock(is);
1534
1535         /* skip or repeat frame. We take into account the
1536            delay to compute the threshold. I still don't know
1537            if it is the best guess */
1538         sync_threshold = FFMAX(AV_SYNC_THRESHOLD_MIN, FFMIN(AV_SYNC_THRESHOLD_MAX, delay));
1539         if (!isnan(diff) && fabs(diff) < is->max_frame_duration) {
1540             if (diff <= -sync_threshold)
1541                 delay = FFMAX(0, delay + diff);
1542             else if (diff >= sync_threshold && delay > AV_SYNC_FRAMEDUP_THRESHOLD)
1543                 delay = delay + diff;
1544             else if (diff >= sync_threshold)
1545                 delay = 2 * delay;
1546         }
1547     }
1548
1549     av_log(NULL, AV_LOG_TRACE, "video: delay=%0.3f A-V=%f\n",
1550             delay, -diff);
1551
1552     return delay;
1553 }
1554
1555 static double vp_duration(VideoState *is, Frame *vp, Frame *nextvp) {
1556     if (vp->serial == nextvp->serial) {
1557         double duration = nextvp->pts - vp->pts;
1558         if (isnan(duration) || duration <= 0 || duration > is->max_frame_duration)
1559             return vp->duration;
1560         else
1561             return duration;
1562     } else {
1563         return 0.0;
1564     }
1565 }
1566
1567 static void update_video_pts(VideoState *is, double pts, int64_t pos, int serial) {
1568     /* update current video pts */
1569     set_clock(&is->vidclk, pts, serial);
1570     sync_clock_to_slave(&is->extclk, &is->vidclk);
1571 }
1572
1573 /* called to display each frame */
1574 static void video_refresh(void *opaque, double *remaining_time)
1575 {
1576     VideoState *is = opaque;
1577     double time;
1578
1579     Frame *sp, *sp2;
1580
1581     if (!is->paused && get_master_sync_type(is) == AV_SYNC_EXTERNAL_CLOCK && is->realtime)
1582         check_external_clock_speed(is);
1583
1584     if (!display_disable && is->show_mode != SHOW_MODE_VIDEO && is->audio_st) {
1585         time = av_gettime_relative() / 1000000.0;
1586         if (is->force_refresh || is->last_vis_time + rdftspeed < time) {
1587             video_display(is);
1588             is->last_vis_time = time;
1589         }
1590         *remaining_time = FFMIN(*remaining_time, is->last_vis_time + rdftspeed - time);
1591     }
1592
1593     if (is->video_st) {
1594 retry:
1595         if (frame_queue_nb_remaining(&is->pictq) == 0) {
1596             // nothing to do, no picture to display in the queue
1597         } else {
1598             double last_duration, duration, delay;
1599             Frame *vp, *lastvp;
1600
1601             /* dequeue the picture */
1602             lastvp = frame_queue_peek_last(&is->pictq);
1603             vp = frame_queue_peek(&is->pictq);
1604
1605             if (vp->serial != is->videoq.serial) {
1606                 frame_queue_next(&is->pictq);
1607                 goto retry;
1608             }
1609
1610             if (lastvp->serial != vp->serial)
1611                 is->frame_timer = av_gettime_relative() / 1000000.0;
1612
1613             if (is->paused)
1614                 goto display;
1615
1616             /* compute nominal last_duration */
1617             last_duration = vp_duration(is, lastvp, vp);
1618             delay = compute_target_delay(last_duration, is);
1619
1620             time= av_gettime_relative()/1000000.0;
1621             if (time < is->frame_timer + delay) {
1622                 *remaining_time = FFMIN(is->frame_timer + delay - time, *remaining_time);
1623                 goto display;
1624             }
1625
1626             is->frame_timer += delay;
1627             if (delay > 0 && time - is->frame_timer > AV_SYNC_THRESHOLD_MAX)
1628                 is->frame_timer = time;
1629
1630             SDL_LockMutex(is->pictq.mutex);
1631             if (!isnan(vp->pts))
1632                 update_video_pts(is, vp->pts, vp->pos, vp->serial);
1633             SDL_UnlockMutex(is->pictq.mutex);
1634
1635             if (frame_queue_nb_remaining(&is->pictq) > 1) {
1636                 Frame *nextvp = frame_queue_peek_next(&is->pictq);
1637                 duration = vp_duration(is, vp, nextvp);
1638                 if(!is->step && (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) && time > is->frame_timer + duration){
1639                     is->frame_drops_late++;
1640                     frame_queue_next(&is->pictq);
1641                     goto retry;
1642                 }
1643             }
1644
1645             if (is->subtitle_st) {
1646                     while (frame_queue_nb_remaining(&is->subpq) > 0) {
1647                         sp = frame_queue_peek(&is->subpq);
1648
1649                         if (frame_queue_nb_remaining(&is->subpq) > 1)
1650                             sp2 = frame_queue_peek_next(&is->subpq);
1651                         else
1652                             sp2 = NULL;
1653
1654                         if (sp->serial != is->subtitleq.serial
1655                                 || (is->vidclk.pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
1656                                 || (sp2 && is->vidclk.pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
1657                         {
1658                             if (sp->uploaded) {
1659                                 int i;
1660                                 for (i = 0; i < sp->sub.num_rects; i++) {
1661                                     AVSubtitleRect *sub_rect = sp->sub.rects[i];
1662                                     uint8_t *pixels;
1663                                     int pitch, j;
1664
1665                                     if (!SDL_LockTexture(is->sub_texture, (SDL_Rect *)sub_rect, (void **)&pixels, &pitch)) {
1666                                         for (j = 0; j < sub_rect->h; j++, pixels += pitch)
1667                                             memset(pixels, 0, sub_rect->w << 2);
1668                                         SDL_UnlockTexture(is->sub_texture);
1669                                     }
1670                                 }
1671                             }
1672                             frame_queue_next(&is->subpq);
1673                         } else {
1674                             break;
1675                         }
1676                     }
1677             }
1678
1679             frame_queue_next(&is->pictq);
1680             is->force_refresh = 1;
1681
1682             if (is->step && !is->paused)
1683                 stream_toggle_pause(is);
1684         }
1685 display:
1686         /* display picture */
1687         if (!display_disable && is->force_refresh && is->show_mode == SHOW_MODE_VIDEO && is->pictq.rindex_shown)
1688             video_display(is);
1689     }
1690     is->force_refresh = 0;
1691     if (show_status) {
1692         static int64_t last_time;
1693         int64_t cur_time;
1694         int aqsize, vqsize, sqsize;
1695         double av_diff;
1696
1697         cur_time = av_gettime_relative();
1698         if (!last_time || (cur_time - last_time) >= 30000) {
1699             aqsize = 0;
1700             vqsize = 0;
1701             sqsize = 0;
1702             if (is->audio_st)
1703                 aqsize = is->audioq.size;
1704             if (is->video_st)
1705                 vqsize = is->videoq.size;
1706             if (is->subtitle_st)
1707                 sqsize = is->subtitleq.size;
1708             av_diff = 0;
1709             if (is->audio_st && is->video_st)
1710                 av_diff = get_clock(&is->audclk) - get_clock(&is->vidclk);
1711             else if (is->video_st)
1712                 av_diff = get_master_clock(is) - get_clock(&is->vidclk);
1713             else if (is->audio_st)
1714                 av_diff = get_master_clock(is) - get_clock(&is->audclk);
1715             av_log(NULL, AV_LOG_INFO,
1716                    "%7.2f %s:%7.3f fd=%4d aq=%5dKB vq=%5dKB sq=%5dB f=%"PRId64"/%"PRId64"   \r",
1717                    get_master_clock(is),
1718                    (is->audio_st && is->video_st) ? "A-V" : (is->video_st ? "M-V" : (is->audio_st ? "M-A" : "   ")),
1719                    av_diff,
1720                    is->frame_drops_early + is->frame_drops_late,
1721                    aqsize / 1024,
1722                    vqsize / 1024,
1723                    sqsize,
1724                    is->video_st ? is->viddec.avctx->pts_correction_num_faulty_dts : 0,
1725                    is->video_st ? is->viddec.avctx->pts_correction_num_faulty_pts : 0);
1726             fflush(stdout);
1727             last_time = cur_time;
1728         }
1729     }
1730 }
1731
1732 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts, double duration, int64_t pos, int serial)
1733 {
1734     Frame *vp;
1735
1736 #if defined(DEBUG_SYNC)
1737     printf("frame_type=%c pts=%0.3f\n",
1738            av_get_picture_type_char(src_frame->pict_type), pts);
1739 #endif
1740
1741     if (!(vp = frame_queue_peek_writable(&is->pictq)))
1742         return -1;
1743
1744     vp->sar = src_frame->sample_aspect_ratio;
1745     vp->uploaded = 0;
1746
1747     vp->width = src_frame->width;
1748     vp->height = src_frame->height;
1749     vp->format = src_frame->format;
1750
1751     vp->pts = pts;
1752     vp->duration = duration;
1753     vp->pos = pos;
1754     vp->serial = serial;
1755
1756     set_default_window_size(vp->width, vp->height, vp->sar);
1757
1758     av_frame_move_ref(vp->frame, src_frame);
1759     frame_queue_push(&is->pictq);
1760     return 0;
1761 }
1762
1763 static int get_video_frame(VideoState *is, AVFrame *frame)
1764 {
1765     int got_picture;
1766
1767     if ((got_picture = decoder_decode_frame(&is->viddec, frame, NULL)) < 0)
1768         return -1;
1769
1770     if (got_picture) {
1771         double dpts = NAN;
1772
1773         if (frame->pts != AV_NOPTS_VALUE)
1774             dpts = av_q2d(is->video_st->time_base) * frame->pts;
1775
1776         frame->sample_aspect_ratio = av_guess_sample_aspect_ratio(is->ic, is->video_st, frame);
1777
1778         if (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) {
1779             if (frame->pts != AV_NOPTS_VALUE) {
1780                 double diff = dpts - get_master_clock(is);
1781                 if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD &&
1782                     diff - is->frame_last_filter_delay < 0 &&
1783                     is->viddec.pkt_serial == is->vidclk.serial &&
1784                     is->videoq.nb_packets) {
1785                     is->frame_drops_early++;
1786                     av_frame_unref(frame);
1787                     got_picture = 0;
1788                 }
1789             }
1790         }
1791     }
1792
1793     return got_picture;
1794 }
1795
1796 #if CONFIG_AVFILTER
1797 static int configure_filtergraph(AVFilterGraph *graph, const char *filtergraph,
1798                                  AVFilterContext *source_ctx, AVFilterContext *sink_ctx)
1799 {
1800     int ret, i;
1801     int nb_filters = graph->nb_filters;
1802     AVFilterInOut *outputs = NULL, *inputs = NULL;
1803
1804     if (filtergraph) {
1805         outputs = avfilter_inout_alloc();
1806         inputs  = avfilter_inout_alloc();
1807         if (!outputs || !inputs) {
1808             ret = AVERROR(ENOMEM);
1809             goto fail;
1810         }
1811
1812         outputs->name       = av_strdup("in");
1813         outputs->filter_ctx = source_ctx;
1814         outputs->pad_idx    = 0;
1815         outputs->next       = NULL;
1816
1817         inputs->name        = av_strdup("out");
1818         inputs->filter_ctx  = sink_ctx;
1819         inputs->pad_idx     = 0;
1820         inputs->next        = NULL;
1821
1822         if ((ret = avfilter_graph_parse_ptr(graph, filtergraph, &inputs, &outputs, NULL)) < 0)
1823             goto fail;
1824     } else {
1825         if ((ret = avfilter_link(source_ctx, 0, sink_ctx, 0)) < 0)
1826             goto fail;
1827     }
1828
1829     /* Reorder the filters to ensure that inputs of the custom filters are merged first */
1830     for (i = 0; i < graph->nb_filters - nb_filters; i++)
1831         FFSWAP(AVFilterContext*, graph->filters[i], graph->filters[i + nb_filters]);
1832
1833     ret = avfilter_graph_config(graph, NULL);
1834 fail:
1835     avfilter_inout_free(&outputs);
1836     avfilter_inout_free(&inputs);
1837     return ret;
1838 }
1839
1840 static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const char *vfilters, AVFrame *frame)
1841 {
1842     enum AVPixelFormat pix_fmts[FF_ARRAY_ELEMS(sdl_texture_format_map)];
1843     char sws_flags_str[512] = "";
1844     char buffersrc_args[256];
1845     int ret;
1846     AVFilterContext *filt_src = NULL, *filt_out = NULL, *last_filter = NULL;
1847     AVCodecParameters *codecpar = is->video_st->codecpar;
1848     AVRational fr = av_guess_frame_rate(is->ic, is->video_st, NULL);
1849     AVDictionaryEntry *e = NULL;
1850     int nb_pix_fmts = 0;
1851     int i, j;
1852
1853     for (i = 0; i < renderer_info.num_texture_formats; i++) {
1854         for (j = 0; j < FF_ARRAY_ELEMS(sdl_texture_format_map) - 1; j++) {
1855             if (renderer_info.texture_formats[i] == sdl_texture_format_map[j].texture_fmt) {
1856                 pix_fmts[nb_pix_fmts++] = sdl_texture_format_map[j].format;
1857                 break;
1858             }
1859         }
1860     }
1861     pix_fmts[nb_pix_fmts] = AV_PIX_FMT_NONE;
1862
1863     while ((e = av_dict_get(sws_dict, "", e, AV_DICT_IGNORE_SUFFIX))) {
1864         if (!strcmp(e->key, "sws_flags")) {
1865             av_strlcatf(sws_flags_str, sizeof(sws_flags_str), "%s=%s:", "flags", e->value);
1866         } else
1867             av_strlcatf(sws_flags_str, sizeof(sws_flags_str), "%s=%s:", e->key, e->value);
1868     }
1869     if (strlen(sws_flags_str))
1870         sws_flags_str[strlen(sws_flags_str)-1] = '\0';
1871
1872     graph->scale_sws_opts = av_strdup(sws_flags_str);
1873
1874     snprintf(buffersrc_args, sizeof(buffersrc_args),
1875              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
1876              frame->width, frame->height, frame->format,
1877              is->video_st->time_base.num, is->video_st->time_base.den,
1878              codecpar->sample_aspect_ratio.num, FFMAX(codecpar->sample_aspect_ratio.den, 1));
1879     if (fr.num && fr.den)
1880         av_strlcatf(buffersrc_args, sizeof(buffersrc_args), ":frame_rate=%d/%d", fr.num, fr.den);
1881
1882     if ((ret = avfilter_graph_create_filter(&filt_src,
1883                                             avfilter_get_by_name("buffer"),
1884                                             "ffplay_buffer", buffersrc_args, NULL,
1885                                             graph)) < 0)
1886         goto fail;
1887
1888     ret = avfilter_graph_create_filter(&filt_out,
1889                                        avfilter_get_by_name("buffersink"),
1890                                        "ffplay_buffersink", NULL, NULL, graph);
1891     if (ret < 0)
1892         goto fail;
1893
1894     if ((ret = av_opt_set_int_list(filt_out, "pix_fmts", pix_fmts,  AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1895         goto fail;
1896
1897     last_filter = filt_out;
1898
1899 /* Note: this macro adds a filter before the lastly added filter, so the
1900  * processing order of the filters is in reverse */
1901 #define INSERT_FILT(name, arg) do {                                          \
1902     AVFilterContext *filt_ctx;                                               \
1903                                                                              \
1904     ret = avfilter_graph_create_filter(&filt_ctx,                            \
1905                                        avfilter_get_by_name(name),           \
1906                                        "ffplay_" name, arg, NULL, graph);    \
1907     if (ret < 0)                                                             \
1908         goto fail;                                                           \
1909                                                                              \
1910     ret = avfilter_link(filt_ctx, 0, last_filter, 0);                        \
1911     if (ret < 0)                                                             \
1912         goto fail;                                                           \
1913                                                                              \
1914     last_filter = filt_ctx;                                                  \
1915 } while (0)
1916
1917     if (autorotate) {
1918         double theta  = get_rotation(is->video_st);
1919
1920         if (fabs(theta - 90) < 1.0) {
1921             INSERT_FILT("transpose", "clock");
1922         } else if (fabs(theta - 180) < 1.0) {
1923             INSERT_FILT("hflip", NULL);
1924             INSERT_FILT("vflip", NULL);
1925         } else if (fabs(theta - 270) < 1.0) {
1926             INSERT_FILT("transpose", "cclock");
1927         } else if (fabs(theta) > 1.0) {
1928             char rotate_buf[64];
1929             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
1930             INSERT_FILT("rotate", rotate_buf);
1931         }
1932     }
1933
1934     if ((ret = configure_filtergraph(graph, vfilters, filt_src, last_filter)) < 0)
1935         goto fail;
1936
1937     is->in_video_filter  = filt_src;
1938     is->out_video_filter = filt_out;
1939
1940 fail:
1941     return ret;
1942 }
1943
1944 static int configure_audio_filters(VideoState *is, const char *afilters, int force_output_format)
1945 {
1946     static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
1947     int sample_rates[2] = { 0, -1 };
1948     int64_t channel_layouts[2] = { 0, -1 };
1949     int channels[2] = { 0, -1 };
1950     AVFilterContext *filt_asrc = NULL, *filt_asink = NULL;
1951     char aresample_swr_opts[512] = "";
1952     AVDictionaryEntry *e = NULL;
1953     char asrc_args[256];
1954     int ret;
1955
1956     avfilter_graph_free(&is->agraph);
1957     if (!(is->agraph = avfilter_graph_alloc()))
1958         return AVERROR(ENOMEM);
1959
1960     while ((e = av_dict_get(swr_opts, "", e, AV_DICT_IGNORE_SUFFIX)))
1961         av_strlcatf(aresample_swr_opts, sizeof(aresample_swr_opts), "%s=%s:", e->key, e->value);
1962     if (strlen(aresample_swr_opts))
1963         aresample_swr_opts[strlen(aresample_swr_opts)-1] = '\0';
1964     av_opt_set(is->agraph, "aresample_swr_opts", aresample_swr_opts, 0);
1965
1966     ret = snprintf(asrc_args, sizeof(asrc_args),
1967                    "sample_rate=%d:sample_fmt=%s:channels=%d:time_base=%d/%d",
1968                    is->audio_filter_src.freq, av_get_sample_fmt_name(is->audio_filter_src.fmt),
1969                    is->audio_filter_src.channels,
1970                    1, is->audio_filter_src.freq);
1971     if (is->audio_filter_src.channel_layout)
1972         snprintf(asrc_args + ret, sizeof(asrc_args) - ret,
1973                  ":channel_layout=0x%"PRIx64,  is->audio_filter_src.channel_layout);
1974
1975     ret = avfilter_graph_create_filter(&filt_asrc,
1976                                        avfilter_get_by_name("abuffer"), "ffplay_abuffer",
1977                                        asrc_args, NULL, is->agraph);
1978     if (ret < 0)
1979         goto end;
1980
1981
1982     ret = avfilter_graph_create_filter(&filt_asink,
1983                                        avfilter_get_by_name("abuffersink"), "ffplay_abuffersink",
1984                                        NULL, NULL, is->agraph);
1985     if (ret < 0)
1986         goto end;
1987
1988     if ((ret = av_opt_set_int_list(filt_asink, "sample_fmts", sample_fmts,  AV_SAMPLE_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1989         goto end;
1990     if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
1991         goto end;
1992
1993     if (force_output_format) {
1994         channel_layouts[0] = is->audio_tgt.channel_layout;
1995         channels       [0] = is->audio_tgt.channels;
1996         sample_rates   [0] = is->audio_tgt.freq;
1997         if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 0, AV_OPT_SEARCH_CHILDREN)) < 0)
1998             goto end;
1999         if ((ret = av_opt_set_int_list(filt_asink, "channel_layouts", channel_layouts,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
2000             goto end;
2001         if ((ret = av_opt_set_int_list(filt_asink, "channel_counts" , channels       ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
2002             goto end;
2003         if ((ret = av_opt_set_int_list(filt_asink, "sample_rates"   , sample_rates   ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
2004             goto end;
2005     }
2006
2007
2008     if ((ret = configure_filtergraph(is->agraph, afilters, filt_asrc, filt_asink)) < 0)
2009         goto end;
2010
2011     is->in_audio_filter  = filt_asrc;
2012     is->out_audio_filter = filt_asink;
2013
2014 end:
2015     if (ret < 0)
2016         avfilter_graph_free(&is->agraph);
2017     return ret;
2018 }
2019 #endif  /* CONFIG_AVFILTER */
2020
2021 static int audio_thread(void *arg)
2022 {
2023     VideoState *is = arg;
2024     AVFrame *frame = av_frame_alloc();
2025     Frame *af;
2026 #if CONFIG_AVFILTER
2027     int last_serial = -1;
2028     int64_t dec_channel_layout;
2029     int reconfigure;
2030 #endif
2031     int got_frame = 0;
2032     AVRational tb;
2033     int ret = 0;
2034
2035     if (!frame)
2036         return AVERROR(ENOMEM);
2037
2038     do {
2039         if ((got_frame = decoder_decode_frame(&is->auddec, frame, NULL)) < 0)
2040             goto the_end;
2041
2042         if (got_frame) {
2043                 tb = (AVRational){1, frame->sample_rate};
2044
2045 #if CONFIG_AVFILTER
2046                 dec_channel_layout = get_valid_channel_layout(frame->channel_layout, frame->channels);
2047
2048                 reconfigure =
2049                     cmp_audio_fmts(is->audio_filter_src.fmt, is->audio_filter_src.channels,
2050                                    frame->format, frame->channels)    ||
2051                     is->audio_filter_src.channel_layout != dec_channel_layout ||
2052                     is->audio_filter_src.freq           != frame->sample_rate ||
2053                     is->auddec.pkt_serial               != last_serial;
2054
2055                 if (reconfigure) {
2056                     char buf1[1024], buf2[1024];
2057                     av_get_channel_layout_string(buf1, sizeof(buf1), -1, is->audio_filter_src.channel_layout);
2058                     av_get_channel_layout_string(buf2, sizeof(buf2), -1, dec_channel_layout);
2059                     av_log(NULL, AV_LOG_DEBUG,
2060                            "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",
2061                            is->audio_filter_src.freq, is->audio_filter_src.channels, av_get_sample_fmt_name(is->audio_filter_src.fmt), buf1, last_serial,
2062                            frame->sample_rate, frame->channels, av_get_sample_fmt_name(frame->format), buf2, is->auddec.pkt_serial);
2063
2064                     is->audio_filter_src.fmt            = frame->format;
2065                     is->audio_filter_src.channels       = frame->channels;
2066                     is->audio_filter_src.channel_layout = dec_channel_layout;
2067                     is->audio_filter_src.freq           = frame->sample_rate;
2068                     last_serial                         = is->auddec.pkt_serial;
2069
2070                     if ((ret = configure_audio_filters(is, afilters, 1)) < 0)
2071                         goto the_end;
2072                 }
2073
2074             if ((ret = av_buffersrc_add_frame(is->in_audio_filter, frame)) < 0)
2075                 goto the_end;
2076
2077             while ((ret = av_buffersink_get_frame_flags(is->out_audio_filter, frame, 0)) >= 0) {
2078                 tb = av_buffersink_get_time_base(is->out_audio_filter);
2079 #endif
2080                 if (!(af = frame_queue_peek_writable(&is->sampq)))
2081                     goto the_end;
2082
2083                 af->pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
2084                 af->pos = frame->pkt_pos;
2085                 af->serial = is->auddec.pkt_serial;
2086                 af->duration = av_q2d((AVRational){frame->nb_samples, frame->sample_rate});
2087
2088                 av_frame_move_ref(af->frame, frame);
2089                 frame_queue_push(&is->sampq);
2090
2091 #if CONFIG_AVFILTER
2092                 if (is->audioq.serial != is->auddec.pkt_serial)
2093                     break;
2094             }
2095             if (ret == AVERROR_EOF)
2096                 is->auddec.finished = is->auddec.pkt_serial;
2097 #endif
2098         }
2099     } while (ret >= 0 || ret == AVERROR(EAGAIN) || ret == AVERROR_EOF);
2100  the_end:
2101 #if CONFIG_AVFILTER
2102     avfilter_graph_free(&is->agraph);
2103 #endif
2104     av_frame_free(&frame);
2105     return ret;
2106 }
2107
2108 static int decoder_start(Decoder *d, int (*fn)(void *), void *arg)
2109 {
2110     packet_queue_start(d->queue);
2111     d->decoder_tid = SDL_CreateThread(fn, "decoder", arg);
2112     if (!d->decoder_tid) {
2113         av_log(NULL, AV_LOG_ERROR, "SDL_CreateThread(): %s\n", SDL_GetError());
2114         return AVERROR(ENOMEM);
2115     }
2116     return 0;
2117 }
2118
2119 static int video_thread(void *arg)
2120 {
2121     VideoState *is = arg;
2122     AVFrame *frame = av_frame_alloc();
2123     double pts;
2124     double duration;
2125     int ret;
2126     AVRational tb = is->video_st->time_base;
2127     AVRational frame_rate = av_guess_frame_rate(is->ic, is->video_st, NULL);
2128
2129 #if CONFIG_AVFILTER
2130     AVFilterGraph *graph = avfilter_graph_alloc();
2131     AVFilterContext *filt_out = NULL, *filt_in = NULL;
2132     int last_w = 0;
2133     int last_h = 0;
2134     enum AVPixelFormat last_format = -2;
2135     int last_serial = -1;
2136     int last_vfilter_idx = 0;
2137     if (!graph) {
2138         av_frame_free(&frame);
2139         return AVERROR(ENOMEM);
2140     }
2141
2142 #endif
2143
2144     if (!frame) {
2145 #if CONFIG_AVFILTER
2146         avfilter_graph_free(&graph);
2147 #endif
2148         return AVERROR(ENOMEM);
2149     }
2150
2151     for (;;) {
2152         ret = get_video_frame(is, frame);
2153         if (ret < 0)
2154             goto the_end;
2155         if (!ret)
2156             continue;
2157
2158 #if CONFIG_AVFILTER
2159         if (   last_w != frame->width
2160             || last_h != frame->height
2161             || last_format != frame->format
2162             || last_serial != is->viddec.pkt_serial
2163             || last_vfilter_idx != is->vfilter_idx) {
2164             av_log(NULL, AV_LOG_DEBUG,
2165                    "Video frame changed from size:%dx%d format:%s serial:%d to size:%dx%d format:%s serial:%d\n",
2166                    last_w, last_h,
2167                    (const char *)av_x_if_null(av_get_pix_fmt_name(last_format), "none"), last_serial,
2168                    frame->width, frame->height,
2169                    (const char *)av_x_if_null(av_get_pix_fmt_name(frame->format), "none"), is->viddec.pkt_serial);
2170             avfilter_graph_free(&graph);
2171             graph = avfilter_graph_alloc();
2172             if ((ret = configure_video_filters(graph, is, vfilters_list ? vfilters_list[is->vfilter_idx] : NULL, frame)) < 0) {
2173                 SDL_Event event;
2174                 event.type = FF_QUIT_EVENT;
2175                 event.user.data1 = is;
2176                 SDL_PushEvent(&event);
2177                 goto the_end;
2178             }
2179             filt_in  = is->in_video_filter;
2180             filt_out = is->out_video_filter;
2181             last_w = frame->width;
2182             last_h = frame->height;
2183             last_format = frame->format;
2184             last_serial = is->viddec.pkt_serial;
2185             last_vfilter_idx = is->vfilter_idx;
2186             frame_rate = av_buffersink_get_frame_rate(filt_out);
2187         }
2188
2189         ret = av_buffersrc_add_frame(filt_in, frame);
2190         if (ret < 0)
2191             goto the_end;
2192
2193         while (ret >= 0) {
2194             is->frame_last_returned_time = av_gettime_relative() / 1000000.0;
2195
2196             ret = av_buffersink_get_frame_flags(filt_out, frame, 0);
2197             if (ret < 0) {
2198                 if (ret == AVERROR_EOF)
2199                     is->viddec.finished = is->viddec.pkt_serial;
2200                 ret = 0;
2201                 break;
2202             }
2203
2204             is->frame_last_filter_delay = av_gettime_relative() / 1000000.0 - is->frame_last_returned_time;
2205             if (fabs(is->frame_last_filter_delay) > AV_NOSYNC_THRESHOLD / 10.0)
2206                 is->frame_last_filter_delay = 0;
2207             tb = av_buffersink_get_time_base(filt_out);
2208 #endif
2209             duration = (frame_rate.num && frame_rate.den ? av_q2d((AVRational){frame_rate.den, frame_rate.num}) : 0);
2210             pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
2211             ret = queue_picture(is, frame, pts, duration, frame->pkt_pos, is->viddec.pkt_serial);
2212             av_frame_unref(frame);
2213 #if CONFIG_AVFILTER
2214             if (is->videoq.serial != is->viddec.pkt_serial)
2215                 break;
2216         }
2217 #endif
2218
2219         if (ret < 0)
2220             goto the_end;
2221     }
2222  the_end:
2223 #if CONFIG_AVFILTER
2224     avfilter_graph_free(&graph);
2225 #endif
2226     av_frame_free(&frame);
2227     return 0;
2228 }
2229
2230 static int subtitle_thread(void *arg)
2231 {
2232     VideoState *is = arg;
2233     Frame *sp;
2234     int got_subtitle;
2235     double pts;
2236
2237     for (;;) {
2238         if (!(sp = frame_queue_peek_writable(&is->subpq)))
2239             return 0;
2240
2241         if ((got_subtitle = decoder_decode_frame(&is->subdec, NULL, &sp->sub)) < 0)
2242             break;
2243
2244         pts = 0;
2245
2246         if (got_subtitle && sp->sub.format == 0) {
2247             if (sp->sub.pts != AV_NOPTS_VALUE)
2248                 pts = sp->sub.pts / (double)AV_TIME_BASE;
2249             sp->pts = pts;
2250             sp->serial = is->subdec.pkt_serial;
2251             sp->width = is->subdec.avctx->width;
2252             sp->height = is->subdec.avctx->height;
2253             sp->uploaded = 0;
2254
2255             /* now we can update the picture count */
2256             frame_queue_push(&is->subpq);
2257         } else if (got_subtitle) {
2258             avsubtitle_free(&sp->sub);
2259         }
2260     }
2261     return 0;
2262 }
2263
2264 /* copy samples for viewing in editor window */
2265 static void update_sample_display(VideoState *is, short *samples, int samples_size)
2266 {
2267     int size, len;
2268
2269     size = samples_size / sizeof(short);
2270     while (size > 0) {
2271         len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
2272         if (len > size)
2273             len = size;
2274         memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
2275         samples += len;
2276         is->sample_array_index += len;
2277         if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
2278             is->sample_array_index = 0;
2279         size -= len;
2280     }
2281 }
2282
2283 /* return the wanted number of samples to get better sync if sync_type is video
2284  * or external master clock */
2285 static int synchronize_audio(VideoState *is, int nb_samples)
2286 {
2287     int wanted_nb_samples = nb_samples;
2288
2289     /* if not master, then we try to remove or add samples to correct the clock */
2290     if (get_master_sync_type(is) != AV_SYNC_AUDIO_MASTER) {
2291         double diff, avg_diff;
2292         int min_nb_samples, max_nb_samples;
2293
2294         diff = get_clock(&is->audclk) - get_master_clock(is);
2295
2296         if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD) {
2297             is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
2298             if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
2299                 /* not enough measures to have a correct estimate */
2300                 is->audio_diff_avg_count++;
2301             } else {
2302                 /* estimate the A-V difference */
2303                 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
2304
2305                 if (fabs(avg_diff) >= is->audio_diff_threshold) {
2306                     wanted_nb_samples = nb_samples + (int)(diff * is->audio_src.freq);
2307                     min_nb_samples = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2308                     max_nb_samples = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2309                     wanted_nb_samples = av_clip(wanted_nb_samples, min_nb_samples, max_nb_samples);
2310                 }
2311                 av_log(NULL, AV_LOG_TRACE, "diff=%f adiff=%f sample_diff=%d apts=%0.3f %f\n",
2312                         diff, avg_diff, wanted_nb_samples - nb_samples,
2313                         is->audio_clock, is->audio_diff_threshold);
2314             }
2315         } else {
2316             /* too big difference : may be initial PTS errors, so
2317                reset A-V filter */
2318             is->audio_diff_avg_count = 0;
2319             is->audio_diff_cum       = 0;
2320         }
2321     }
2322
2323     return wanted_nb_samples;
2324 }
2325
2326 /**
2327  * Decode one audio frame and return its uncompressed size.
2328  *
2329  * The processed audio frame is decoded, converted if required, and
2330  * stored in is->audio_buf, with size in bytes given by the return
2331  * value.
2332  */
2333 static int audio_decode_frame(VideoState *is)
2334 {
2335     int data_size, resampled_data_size;
2336     int64_t dec_channel_layout;
2337     av_unused double audio_clock0;
2338     int wanted_nb_samples;
2339     Frame *af;
2340
2341     if (is->paused)
2342         return -1;
2343
2344     do {
2345 #if defined(_WIN32)
2346         while (frame_queue_nb_remaining(&is->sampq) == 0) {
2347             if ((av_gettime_relative() - audio_callback_time) > 1000000LL * is->audio_hw_buf_size / is->audio_tgt.bytes_per_sec / 2)
2348                 return -1;
2349             av_usleep (1000);
2350         }
2351 #endif
2352         if (!(af = frame_queue_peek_readable(&is->sampq)))
2353             return -1;
2354         frame_queue_next(&is->sampq);
2355     } while (af->serial != is->audioq.serial);
2356
2357     data_size = av_samples_get_buffer_size(NULL, af->frame->channels,
2358                                            af->frame->nb_samples,
2359                                            af->frame->format, 1);
2360
2361     dec_channel_layout =
2362         (af->frame->channel_layout && af->frame->channels == av_get_channel_layout_nb_channels(af->frame->channel_layout)) ?
2363         af->frame->channel_layout : av_get_default_channel_layout(af->frame->channels);
2364     wanted_nb_samples = synchronize_audio(is, af->frame->nb_samples);
2365
2366     if (af->frame->format        != is->audio_src.fmt            ||
2367         dec_channel_layout       != is->audio_src.channel_layout ||
2368         af->frame->sample_rate   != is->audio_src.freq           ||
2369         (wanted_nb_samples       != af->frame->nb_samples && !is->swr_ctx)) {
2370         swr_free(&is->swr_ctx);
2371         is->swr_ctx = swr_alloc_set_opts(NULL,
2372                                          is->audio_tgt.channel_layout, is->audio_tgt.fmt, is->audio_tgt.freq,
2373                                          dec_channel_layout,           af->frame->format, af->frame->sample_rate,
2374                                          0, NULL);
2375         if (!is->swr_ctx || swr_init(is->swr_ctx) < 0) {
2376             av_log(NULL, AV_LOG_ERROR,
2377                    "Cannot create sample rate converter for conversion of %d Hz %s %d channels to %d Hz %s %d channels!\n",
2378                     af->frame->sample_rate, av_get_sample_fmt_name(af->frame->format), af->frame->channels,
2379                     is->audio_tgt.freq, av_get_sample_fmt_name(is->audio_tgt.fmt), is->audio_tgt.channels);
2380             swr_free(&is->swr_ctx);
2381             return -1;
2382         }
2383         is->audio_src.channel_layout = dec_channel_layout;
2384         is->audio_src.channels       = af->frame->channels;
2385         is->audio_src.freq = af->frame->sample_rate;
2386         is->audio_src.fmt = af->frame->format;
2387     }
2388
2389     if (is->swr_ctx) {
2390         const uint8_t **in = (const uint8_t **)af->frame->extended_data;
2391         uint8_t **out = &is->audio_buf1;
2392         int out_count = (int64_t)wanted_nb_samples * is->audio_tgt.freq / af->frame->sample_rate + 256;
2393         int out_size  = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, out_count, is->audio_tgt.fmt, 0);
2394         int len2;
2395         if (out_size < 0) {
2396             av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size() failed\n");
2397             return -1;
2398         }
2399         if (wanted_nb_samples != af->frame->nb_samples) {
2400             if (swr_set_compensation(is->swr_ctx, (wanted_nb_samples - af->frame->nb_samples) * is->audio_tgt.freq / af->frame->sample_rate,
2401                                         wanted_nb_samples * is->audio_tgt.freq / af->frame->sample_rate) < 0) {
2402                 av_log(NULL, AV_LOG_ERROR, "swr_set_compensation() failed\n");
2403                 return -1;
2404             }
2405         }
2406         av_fast_malloc(&is->audio_buf1, &is->audio_buf1_size, out_size);
2407         if (!is->audio_buf1)
2408             return AVERROR(ENOMEM);
2409         len2 = swr_convert(is->swr_ctx, out, out_count, in, af->frame->nb_samples);
2410         if (len2 < 0) {
2411             av_log(NULL, AV_LOG_ERROR, "swr_convert() failed\n");
2412             return -1;
2413         }
2414         if (len2 == out_count) {
2415             av_log(NULL, AV_LOG_WARNING, "audio buffer is probably too small\n");
2416             if (swr_init(is->swr_ctx) < 0)
2417                 swr_free(&is->swr_ctx);
2418         }
2419         is->audio_buf = is->audio_buf1;
2420         resampled_data_size = len2 * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2421     } else {
2422         is->audio_buf = af->frame->data[0];
2423         resampled_data_size = data_size;
2424     }
2425
2426     audio_clock0 = is->audio_clock;
2427     /* update the audio clock with the pts */
2428     if (!isnan(af->pts))
2429         is->audio_clock = af->pts + (double) af->frame->nb_samples / af->frame->sample_rate;
2430     else
2431         is->audio_clock = NAN;
2432     is->audio_clock_serial = af->serial;
2433 #ifdef DEBUG
2434     {
2435         static double last_clock;
2436         printf("audio: delay=%0.3f clock=%0.3f clock0=%0.3f\n",
2437                is->audio_clock - last_clock,
2438                is->audio_clock, audio_clock0);
2439         last_clock = is->audio_clock;
2440     }
2441 #endif
2442     return resampled_data_size;
2443 }
2444
2445 /* prepare a new audio buffer */
2446 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
2447 {
2448     VideoState *is = opaque;
2449     int audio_size, len1;
2450
2451     audio_callback_time = av_gettime_relative();
2452
2453     while (len > 0) {
2454         if (is->audio_buf_index >= is->audio_buf_size) {
2455            audio_size = audio_decode_frame(is);
2456            if (audio_size < 0) {
2457                 /* if error, just output silence */
2458                is->audio_buf = NULL;
2459                is->audio_buf_size = SDL_AUDIO_MIN_BUFFER_SIZE / is->audio_tgt.frame_size * is->audio_tgt.frame_size;
2460            } else {
2461                if (is->show_mode != SHOW_MODE_VIDEO)
2462                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2463                is->audio_buf_size = audio_size;
2464            }
2465            is->audio_buf_index = 0;
2466         }
2467         len1 = is->audio_buf_size - is->audio_buf_index;
2468         if (len1 > len)
2469             len1 = len;
2470         if (!is->muted && is->audio_buf && is->audio_volume == SDL_MIX_MAXVOLUME)
2471             memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2472         else {
2473             memset(stream, 0, len1);
2474             if (!is->muted && is->audio_buf)
2475                 SDL_MixAudioFormat(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, AUDIO_S16SYS, len1, is->audio_volume);
2476         }
2477         len -= len1;
2478         stream += len1;
2479         is->audio_buf_index += len1;
2480     }
2481     is->audio_write_buf_size = is->audio_buf_size - is->audio_buf_index;
2482     /* Let's assume the audio driver that is used by SDL has two periods. */
2483     if (!isnan(is->audio_clock)) {
2484         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);
2485         sync_clock_to_slave(&is->extclk, &is->audclk);
2486     }
2487 }
2488
2489 static int audio_open(void *opaque, int64_t wanted_channel_layout, int wanted_nb_channels, int wanted_sample_rate, struct AudioParams *audio_hw_params)
2490 {
2491     SDL_AudioSpec wanted_spec, spec;
2492     const char *env;
2493     static const int next_nb_channels[] = {0, 0, 1, 6, 2, 6, 4, 6};
2494     static const int next_sample_rates[] = {0, 44100, 48000, 96000, 192000};
2495     int next_sample_rate_idx = FF_ARRAY_ELEMS(next_sample_rates) - 1;
2496
2497     env = SDL_getenv("SDL_AUDIO_CHANNELS");
2498     if (env) {
2499         wanted_nb_channels = atoi(env);
2500         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2501     }
2502     if (!wanted_channel_layout || wanted_nb_channels != av_get_channel_layout_nb_channels(wanted_channel_layout)) {
2503         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2504         wanted_channel_layout &= ~AV_CH_LAYOUT_STEREO_DOWNMIX;
2505     }
2506     wanted_nb_channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
2507     wanted_spec.channels = wanted_nb_channels;
2508     wanted_spec.freq = wanted_sample_rate;
2509     if (wanted_spec.freq <= 0 || wanted_spec.channels <= 0) {
2510         av_log(NULL, AV_LOG_ERROR, "Invalid sample rate or channel count!\n");
2511         return -1;
2512     }
2513     while (next_sample_rate_idx && next_sample_rates[next_sample_rate_idx] >= wanted_spec.freq)
2514         next_sample_rate_idx--;
2515     wanted_spec.format = AUDIO_S16SYS;
2516     wanted_spec.silence = 0;
2517     wanted_spec.samples = FFMAX(SDL_AUDIO_MIN_BUFFER_SIZE, 2 << av_log2(wanted_spec.freq / SDL_AUDIO_MAX_CALLBACKS_PER_SEC));
2518     wanted_spec.callback = sdl_audio_callback;
2519     wanted_spec.userdata = opaque;
2520     while (!(audio_dev = SDL_OpenAudioDevice(NULL, 0, &wanted_spec, &spec, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE | SDL_AUDIO_ALLOW_CHANNELS_CHANGE))) {
2521         av_log(NULL, AV_LOG_WARNING, "SDL_OpenAudio (%d channels, %d Hz): %s\n",
2522                wanted_spec.channels, wanted_spec.freq, SDL_GetError());
2523         wanted_spec.channels = next_nb_channels[FFMIN(7, wanted_spec.channels)];
2524         if (!wanted_spec.channels) {
2525             wanted_spec.freq = next_sample_rates[next_sample_rate_idx--];
2526             wanted_spec.channels = wanted_nb_channels;
2527             if (!wanted_spec.freq) {
2528                 av_log(NULL, AV_LOG_ERROR,
2529                        "No more combinations to try, audio open failed\n");
2530                 return -1;
2531             }
2532         }
2533         wanted_channel_layout = av_get_default_channel_layout(wanted_spec.channels);
2534     }
2535     if (spec.format != AUDIO_S16SYS) {
2536         av_log(NULL, AV_LOG_ERROR,
2537                "SDL advised audio format %d is not supported!\n", spec.format);
2538         return -1;
2539     }
2540     if (spec.channels != wanted_spec.channels) {
2541         wanted_channel_layout = av_get_default_channel_layout(spec.channels);
2542         if (!wanted_channel_layout) {
2543             av_log(NULL, AV_LOG_ERROR,
2544                    "SDL advised channel count %d is not supported!\n", spec.channels);
2545             return -1;
2546         }
2547     }
2548
2549     audio_hw_params->fmt = AV_SAMPLE_FMT_S16;
2550     audio_hw_params->freq = spec.freq;
2551     audio_hw_params->channel_layout = wanted_channel_layout;
2552     audio_hw_params->channels =  spec.channels;
2553     audio_hw_params->frame_size = av_samples_get_buffer_size(NULL, audio_hw_params->channels, 1, audio_hw_params->fmt, 1);
2554     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);
2555     if (audio_hw_params->bytes_per_sec <= 0 || audio_hw_params->frame_size <= 0) {
2556         av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size failed\n");
2557         return -1;
2558     }
2559     return spec.size;
2560 }
2561
2562 /* open a given stream. Return 0 if OK */
2563 static int stream_component_open(VideoState *is, int stream_index)
2564 {
2565     AVFormatContext *ic = is->ic;
2566     AVCodecContext *avctx;
2567     AVCodec *codec;
2568     const char *forced_codec_name = NULL;
2569     AVDictionary *opts = NULL;
2570     AVDictionaryEntry *t = NULL;
2571     int sample_rate, nb_channels;
2572     int64_t channel_layout;
2573     int ret = 0;
2574     int stream_lowres = lowres;
2575
2576     if (stream_index < 0 || stream_index >= ic->nb_streams)
2577         return -1;
2578
2579     avctx = avcodec_alloc_context3(NULL);
2580     if (!avctx)
2581         return AVERROR(ENOMEM);
2582
2583     ret = avcodec_parameters_to_context(avctx, ic->streams[stream_index]->codecpar);
2584     if (ret < 0)
2585         goto fail;
2586     avctx->pkt_timebase = ic->streams[stream_index]->time_base;
2587
2588     codec = avcodec_find_decoder(avctx->codec_id);
2589
2590     switch(avctx->codec_type){
2591         case AVMEDIA_TYPE_AUDIO   : is->last_audio_stream    = stream_index; forced_codec_name =    audio_codec_name; break;
2592         case AVMEDIA_TYPE_SUBTITLE: is->last_subtitle_stream = stream_index; forced_codec_name = subtitle_codec_name; break;
2593         case AVMEDIA_TYPE_VIDEO   : is->last_video_stream    = stream_index; forced_codec_name =    video_codec_name; break;
2594     }
2595     if (forced_codec_name)
2596         codec = avcodec_find_decoder_by_name(forced_codec_name);
2597     if (!codec) {
2598         if (forced_codec_name) av_log(NULL, AV_LOG_WARNING,
2599                                       "No codec could be found with name '%s'\n", forced_codec_name);
2600         else                   av_log(NULL, AV_LOG_WARNING,
2601                                       "No decoder could be found for codec %s\n", avcodec_get_name(avctx->codec_id));
2602         ret = AVERROR(EINVAL);
2603         goto fail;
2604     }
2605
2606     avctx->codec_id = codec->id;
2607     if (stream_lowres > codec->max_lowres) {
2608         av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
2609                 codec->max_lowres);
2610         stream_lowres = codec->max_lowres;
2611     }
2612     avctx->lowres = stream_lowres;
2613
2614     if (fast)
2615         avctx->flags2 |= AV_CODEC_FLAG2_FAST;
2616
2617     opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], codec);
2618     if (!av_dict_get(opts, "threads", NULL, 0))
2619         av_dict_set(&opts, "threads", "auto", 0);
2620     if (stream_lowres)
2621         av_dict_set_int(&opts, "lowres", stream_lowres, 0);
2622     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
2623         av_dict_set(&opts, "refcounted_frames", "1", 0);
2624     if ((ret = avcodec_open2(avctx, codec, &opts)) < 0) {
2625         goto fail;
2626     }
2627     if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2628         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2629         ret =  AVERROR_OPTION_NOT_FOUND;
2630         goto fail;
2631     }
2632
2633     is->eof = 0;
2634     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
2635     switch (avctx->codec_type) {
2636     case AVMEDIA_TYPE_AUDIO:
2637 #if CONFIG_AVFILTER
2638         {
2639             AVFilterContext *sink;
2640
2641             is->audio_filter_src.freq           = avctx->sample_rate;
2642             is->audio_filter_src.channels       = avctx->channels;
2643             is->audio_filter_src.channel_layout = get_valid_channel_layout(avctx->channel_layout, avctx->channels);
2644             is->audio_filter_src.fmt            = avctx->sample_fmt;
2645             if ((ret = configure_audio_filters(is, afilters, 0)) < 0)
2646                 goto fail;
2647             sink = is->out_audio_filter;
2648             sample_rate    = av_buffersink_get_sample_rate(sink);
2649             nb_channels    = av_buffersink_get_channels(sink);
2650             channel_layout = av_buffersink_get_channel_layout(sink);
2651         }
2652 #else
2653         sample_rate    = avctx->sample_rate;
2654         nb_channels    = avctx->channels;
2655         channel_layout = avctx->channel_layout;
2656 #endif
2657
2658         /* prepare audio output */
2659         if ((ret = audio_open(is, channel_layout, nb_channels, sample_rate, &is->audio_tgt)) < 0)
2660             goto fail;
2661         is->audio_hw_buf_size = ret;
2662         is->audio_src = is->audio_tgt;
2663         is->audio_buf_size  = 0;
2664         is->audio_buf_index = 0;
2665
2666         /* init averaging filter */
2667         is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2668         is->audio_diff_avg_count = 0;
2669         /* since we do not have a precise anough audio FIFO fullness,
2670            we correct audio sync only if larger than this threshold */
2671         is->audio_diff_threshold = (double)(is->audio_hw_buf_size) / is->audio_tgt.bytes_per_sec;
2672
2673         is->audio_stream = stream_index;
2674         is->audio_st = ic->streams[stream_index];
2675
2676         decoder_init(&is->auddec, avctx, &is->audioq, is->continue_read_thread);
2677         if ((is->ic->iformat->flags & (AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK)) && !is->ic->iformat->read_seek) {
2678             is->auddec.start_pts = is->audio_st->start_time;
2679             is->auddec.start_pts_tb = is->audio_st->time_base;
2680         }
2681         if ((ret = decoder_start(&is->auddec, audio_thread, is)) < 0)
2682             goto out;
2683         SDL_PauseAudioDevice(audio_dev, 0);
2684         break;
2685     case AVMEDIA_TYPE_VIDEO:
2686         is->video_stream = stream_index;
2687         is->video_st = ic->streams[stream_index];
2688
2689         decoder_init(&is->viddec, avctx, &is->videoq, is->continue_read_thread);
2690         if ((ret = decoder_start(&is->viddec, video_thread, is)) < 0)
2691             goto out;
2692         is->queue_attachments_req = 1;
2693         break;
2694     case AVMEDIA_TYPE_SUBTITLE:
2695         is->subtitle_stream = stream_index;
2696         is->subtitle_st = ic->streams[stream_index];
2697
2698         decoder_init(&is->subdec, avctx, &is->subtitleq, is->continue_read_thread);
2699         if ((ret = decoder_start(&is->subdec, subtitle_thread, is)) < 0)
2700             goto out;
2701         break;
2702     default:
2703         break;
2704     }
2705     goto out;
2706
2707 fail:
2708     avcodec_free_context(&avctx);
2709 out:
2710     av_dict_free(&opts);
2711
2712     return ret;
2713 }
2714
2715 static int decode_interrupt_cb(void *ctx)
2716 {
2717     VideoState *is = ctx;
2718     return is->abort_request;
2719 }
2720
2721 static int stream_has_enough_packets(AVStream *st, int stream_id, PacketQueue *queue) {
2722     return stream_id < 0 ||
2723            queue->abort_request ||
2724            (st->disposition & AV_DISPOSITION_ATTACHED_PIC) ||
2725            queue->nb_packets > MIN_FRAMES && (!queue->duration || av_q2d(st->time_base) * queue->duration > 1.0);
2726 }
2727
2728 static int is_realtime(AVFormatContext *s)
2729 {
2730     if(   !strcmp(s->iformat->name, "rtp")
2731        || !strcmp(s->iformat->name, "rtsp")
2732        || !strcmp(s->iformat->name, "sdp")
2733     )
2734         return 1;
2735
2736     if(s->pb && (   !strncmp(s->url, "rtp:", 4)
2737                  || !strncmp(s->url, "udp:", 4)
2738                 )
2739     )
2740         return 1;
2741     return 0;
2742 }
2743
2744 /* this thread gets the stream from the disk or the network */
2745 static int read_thread(void *arg)
2746 {
2747     VideoState *is = arg;
2748     AVFormatContext *ic = NULL;
2749     int err, i, ret;
2750     int st_index[AVMEDIA_TYPE_NB];
2751     AVPacket pkt1, *pkt = &pkt1;
2752     int64_t stream_start_time;
2753     int pkt_in_play_range = 0;
2754     AVDictionaryEntry *t;
2755     SDL_mutex *wait_mutex = SDL_CreateMutex();
2756     int scan_all_pmts_set = 0;
2757     int64_t pkt_ts;
2758
2759     if (!wait_mutex) {
2760         av_log(NULL, AV_LOG_FATAL, "SDL_CreateMutex(): %s\n", SDL_GetError());
2761         ret = AVERROR(ENOMEM);
2762         goto fail;
2763     }
2764
2765     memset(st_index, -1, sizeof(st_index));
2766     is->last_video_stream = is->video_stream = -1;
2767     is->last_audio_stream = is->audio_stream = -1;
2768     is->last_subtitle_stream = is->subtitle_stream = -1;
2769     is->eof = 0;
2770
2771     ic = avformat_alloc_context();
2772     if (!ic) {
2773         av_log(NULL, AV_LOG_FATAL, "Could not allocate context.\n");
2774         ret = AVERROR(ENOMEM);
2775         goto fail;
2776     }
2777     ic->interrupt_callback.callback = decode_interrupt_cb;
2778     ic->interrupt_callback.opaque = is;
2779     if (!av_dict_get(format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE)) {
2780         av_dict_set(&format_opts, "scan_all_pmts", "1", AV_DICT_DONT_OVERWRITE);
2781         scan_all_pmts_set = 1;
2782     }
2783     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2784     if (err < 0) {
2785         print_error(is->filename, err);
2786         ret = -1;
2787         goto fail;
2788     }
2789     if (scan_all_pmts_set)
2790         av_dict_set(&format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE);
2791
2792     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2793         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2794         ret = AVERROR_OPTION_NOT_FOUND;
2795         goto fail;
2796     }
2797     is->ic = ic;
2798
2799     if (genpts)
2800         ic->flags |= AVFMT_FLAG_GENPTS;
2801
2802     av_format_inject_global_side_data(ic);
2803
2804     if (find_stream_info) {
2805         AVDictionary **opts = setup_find_stream_info_opts(ic, codec_opts);
2806         int orig_nb_streams = ic->nb_streams;
2807
2808         err = avformat_find_stream_info(ic, opts);
2809
2810         for (i = 0; i < orig_nb_streams; i++)
2811             av_dict_free(&opts[i]);
2812         av_freep(&opts);
2813
2814         if (err < 0) {
2815             av_log(NULL, AV_LOG_WARNING,
2816                    "%s: could not find codec parameters\n", is->filename);
2817             ret = -1;
2818             goto fail;
2819         }
2820     }
2821
2822     if (ic->pb)
2823         ic->pb->eof_reached = 0; // FIXME hack, ffplay maybe should not use avio_feof() to test for the end
2824
2825     if (seek_by_bytes < 0)
2826         seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT) && strcmp("ogg", ic->iformat->name);
2827
2828     is->max_frame_duration = (ic->iformat->flags & AVFMT_TS_DISCONT) ? 10.0 : 3600.0;
2829
2830     if (!window_title && (t = av_dict_get(ic->metadata, "title", NULL, 0)))
2831         window_title = av_asprintf("%s - %s", t->value, input_filename);
2832
2833     /* if seeking requested, we execute it */
2834     if (start_time != AV_NOPTS_VALUE) {
2835         int64_t timestamp;
2836
2837         timestamp = start_time;
2838         /* add the stream start time */
2839         if (ic->start_time != AV_NOPTS_VALUE)
2840             timestamp += ic->start_time;
2841         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
2842         if (ret < 0) {
2843             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
2844                     is->filename, (double)timestamp / AV_TIME_BASE);
2845         }
2846     }
2847
2848     is->realtime = is_realtime(ic);
2849
2850     if (show_status)
2851         av_dump_format(ic, 0, is->filename, 0);
2852
2853     for (i = 0; i < ic->nb_streams; i++) {
2854         AVStream *st = ic->streams[i];
2855         enum AVMediaType type = st->codecpar->codec_type;
2856         st->discard = AVDISCARD_ALL;
2857         if (type >= 0 && wanted_stream_spec[type] && st_index[type] == -1)
2858             if (avformat_match_stream_specifier(ic, st, wanted_stream_spec[type]) > 0)
2859                 st_index[type] = i;
2860     }
2861     for (i = 0; i < AVMEDIA_TYPE_NB; i++) {
2862         if (wanted_stream_spec[i] && st_index[i] == -1) {
2863             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));
2864             st_index[i] = INT_MAX;
2865         }
2866     }
2867
2868     if (!video_disable)
2869         st_index[AVMEDIA_TYPE_VIDEO] =
2870             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
2871                                 st_index[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
2872     if (!audio_disable)
2873         st_index[AVMEDIA_TYPE_AUDIO] =
2874             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
2875                                 st_index[AVMEDIA_TYPE_AUDIO],
2876                                 st_index[AVMEDIA_TYPE_VIDEO],
2877                                 NULL, 0);
2878     if (!video_disable && !subtitle_disable)
2879         st_index[AVMEDIA_TYPE_SUBTITLE] =
2880             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
2881                                 st_index[AVMEDIA_TYPE_SUBTITLE],
2882                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
2883                                  st_index[AVMEDIA_TYPE_AUDIO] :
2884                                  st_index[AVMEDIA_TYPE_VIDEO]),
2885                                 NULL, 0);
2886
2887     is->show_mode = show_mode;
2888     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2889         AVStream *st = ic->streams[st_index[AVMEDIA_TYPE_VIDEO]];
2890         AVCodecParameters *codecpar = st->codecpar;
2891         AVRational sar = av_guess_sample_aspect_ratio(ic, st, NULL);
2892         if (codecpar->width)
2893             set_default_window_size(codecpar->width, codecpar->height, sar);
2894     }
2895
2896     /* open the streams */
2897     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
2898         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2899     }
2900
2901     ret = -1;
2902     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2903         ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2904     }
2905     if (is->show_mode == SHOW_MODE_NONE)
2906         is->show_mode = ret >= 0 ? SHOW_MODE_VIDEO : SHOW_MODE_RDFT;
2907
2908     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
2909         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2910     }
2911
2912     if (is->video_stream < 0 && is->audio_stream < 0) {
2913         av_log(NULL, AV_LOG_FATAL, "Failed to open file '%s' or configure filtergraph\n",
2914                is->filename);
2915         ret = -1;
2916         goto fail;
2917     }
2918
2919     if (infinite_buffer < 0 && is->realtime)
2920         infinite_buffer = 1;
2921
2922     for (;;) {
2923         if (is->abort_request)
2924             break;
2925         if (is->paused != is->last_paused) {
2926             is->last_paused = is->paused;
2927             if (is->paused)
2928                 is->read_pause_return = av_read_pause(ic);
2929             else
2930                 av_read_play(ic);
2931         }
2932 #if CONFIG_RTSP_DEMUXER || CONFIG_MMSH_PROTOCOL
2933         if (is->paused &&
2934                 (!strcmp(ic->iformat->name, "rtsp") ||
2935                  (ic->pb && !strncmp(input_filename, "mmsh:", 5)))) {
2936             /* wait 10 ms to avoid trying to get another packet */
2937             /* XXX: horrible */
2938             SDL_Delay(10);
2939             continue;
2940         }
2941 #endif
2942         if (is->seek_req) {
2943             int64_t seek_target = is->seek_pos;
2944             int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2945             int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2946 // FIXME the +-2 is due to rounding being not done in the correct direction in generation
2947 //      of the seek_pos/seek_rel variables
2948
2949             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2950             if (ret < 0) {
2951                 av_log(NULL, AV_LOG_ERROR,
2952                        "%s: error while seeking\n", is->ic->url);
2953             } else {
2954                 if (is->audio_stream >= 0) {
2955                     packet_queue_flush(&is->audioq);
2956                     packet_queue_put(&is->audioq, &flush_pkt);
2957                 }
2958                 if (is->subtitle_stream >= 0) {
2959                     packet_queue_flush(&is->subtitleq);
2960                     packet_queue_put(&is->subtitleq, &flush_pkt);
2961                 }
2962                 if (is->video_stream >= 0) {
2963                     packet_queue_flush(&is->videoq);
2964                     packet_queue_put(&is->videoq, &flush_pkt);
2965                 }
2966                 if (is->seek_flags & AVSEEK_FLAG_BYTE) {
2967                    set_clock(&is->extclk, NAN, 0);
2968                 } else {
2969                    set_clock(&is->extclk, seek_target / (double)AV_TIME_BASE, 0);
2970                 }
2971             }
2972             is->seek_req = 0;
2973             is->queue_attachments_req = 1;
2974             is->eof = 0;
2975             if (is->paused)
2976                 step_to_next_frame(is);
2977         }
2978         if (is->queue_attachments_req) {
2979             if (is->video_st && is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC) {
2980                 AVPacket copy = { 0 };
2981                 if ((ret = av_packet_ref(&copy, &is->video_st->attached_pic)) < 0)
2982                     goto fail;
2983                 packet_queue_put(&is->videoq, &copy);
2984                 packet_queue_put_nullpacket(&is->videoq, is->video_stream);
2985             }
2986             is->queue_attachments_req = 0;
2987         }
2988
2989         /* if the queue are full, no need to read more */
2990         if (infinite_buffer<1 &&
2991               (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2992             || (stream_has_enough_packets(is->audio_st, is->audio_stream, &is->audioq) &&
2993                 stream_has_enough_packets(is->video_st, is->video_stream, &is->videoq) &&
2994                 stream_has_enough_packets(is->subtitle_st, is->subtitle_stream, &is->subtitleq)))) {
2995             /* wait 10 ms */
2996             SDL_LockMutex(wait_mutex);
2997             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2998             SDL_UnlockMutex(wait_mutex);
2999             continue;
3000         }
3001         if (!is->paused &&
3002             (!is->audio_st || (is->auddec.finished == is->audioq.serial && frame_queue_nb_remaining(&is->sampq) == 0)) &&
3003             (!is->video_st || (is->viddec.finished == is->videoq.serial && frame_queue_nb_remaining(&is->pictq) == 0))) {
3004             if (loop != 1 && (!loop || --loop)) {
3005                 stream_seek(is, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
3006             } else if (autoexit) {
3007                 ret = AVERROR_EOF;
3008                 goto fail;
3009             }
3010         }
3011         ret = av_read_frame(ic, pkt);
3012         if (ret < 0) {
3013             if ((ret == AVERROR_EOF || avio_feof(ic->pb)) && !is->eof) {
3014                 if (is->video_stream >= 0)
3015                     packet_queue_put_nullpacket(&is->videoq, is->video_stream);
3016                 if (is->audio_stream >= 0)
3017                     packet_queue_put_nullpacket(&is->audioq, is->audio_stream);
3018                 if (is->subtitle_stream >= 0)
3019                     packet_queue_put_nullpacket(&is->subtitleq, is->subtitle_stream);
3020                 is->eof = 1;
3021             }
3022             if (ic->pb && ic->pb->error)
3023                 break;
3024             SDL_LockMutex(wait_mutex);
3025             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
3026             SDL_UnlockMutex(wait_mutex);
3027             continue;
3028         } else {
3029             is->eof = 0;
3030         }
3031         /* check if packet is in play range specified by user, then queue, otherwise discard */
3032         stream_start_time = ic->streams[pkt->stream_index]->start_time;
3033         pkt_ts = pkt->pts == AV_NOPTS_VALUE ? pkt->dts : pkt->pts;
3034         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
3035                 (pkt_ts - (stream_start_time != AV_NOPTS_VALUE ? stream_start_time : 0)) *
3036                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
3037                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
3038                 <= ((double)duration / 1000000);
3039         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
3040             packet_queue_put(&is->audioq, pkt);
3041         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range
3042                    && !(is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
3043             packet_queue_put(&is->videoq, pkt);
3044         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
3045             packet_queue_put(&is->subtitleq, pkt);
3046         } else {
3047             av_packet_unref(pkt);
3048         }
3049     }
3050
3051     ret = 0;
3052  fail:
3053     if (ic && !is->ic)
3054         avformat_close_input(&ic);
3055
3056     if (ret != 0) {
3057         SDL_Event event;
3058
3059         event.type = FF_QUIT_EVENT;
3060         event.user.data1 = is;
3061         SDL_PushEvent(&event);
3062     }
3063     SDL_DestroyMutex(wait_mutex);
3064     return 0;
3065 }
3066
3067 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
3068 {
3069     VideoState *is;
3070
3071     is = av_mallocz(sizeof(VideoState));
3072     if (!is)
3073         return NULL;
3074     is->filename = av_strdup(filename);
3075     if (!is->filename)
3076         goto fail;
3077     is->iformat = iformat;
3078     is->ytop    = 0;
3079     is->xleft   = 0;
3080
3081     /* start video display */
3082     if (frame_queue_init(&is->pictq, &is->videoq, VIDEO_PICTURE_QUEUE_SIZE, 1) < 0)
3083         goto fail;
3084     if (frame_queue_init(&is->subpq, &is->subtitleq, SUBPICTURE_QUEUE_SIZE, 0) < 0)
3085         goto fail;
3086     if (frame_queue_init(&is->sampq, &is->audioq, SAMPLE_QUEUE_SIZE, 1) < 0)
3087         goto fail;
3088
3089     if (packet_queue_init(&is->videoq) < 0 ||
3090         packet_queue_init(&is->audioq) < 0 ||
3091         packet_queue_init(&is->subtitleq) < 0)
3092         goto fail;
3093
3094     if (!(is->continue_read_thread = SDL_CreateCond())) {
3095         av_log(NULL, AV_LOG_FATAL, "SDL_CreateCond(): %s\n", SDL_GetError());
3096         goto fail;
3097     }
3098
3099     init_clock(&is->vidclk, &is->videoq.serial);
3100     init_clock(&is->audclk, &is->audioq.serial);
3101     init_clock(&is->extclk, &is->extclk.serial);
3102     is->audio_clock_serial = -1;
3103     if (startup_volume < 0)
3104         av_log(NULL, AV_LOG_WARNING, "-volume=%d < 0, setting to 0\n", startup_volume);
3105     if (startup_volume > 100)
3106         av_log(NULL, AV_LOG_WARNING, "-volume=%d > 100, setting to 100\n", startup_volume);
3107     startup_volume = av_clip(startup_volume, 0, 100);
3108     startup_volume = av_clip(SDL_MIX_MAXVOLUME * startup_volume / 100, 0, SDL_MIX_MAXVOLUME);
3109     is->audio_volume = startup_volume;
3110     is->muted = 0;
3111     is->av_sync_type = av_sync_type;
3112     is->read_tid     = SDL_CreateThread(read_thread, "read_thread", is);
3113     if (!is->read_tid) {
3114         av_log(NULL, AV_LOG_FATAL, "SDL_CreateThread(): %s\n", SDL_GetError());
3115 fail:
3116         stream_close(is);
3117         return NULL;
3118     }
3119     return is;
3120 }
3121
3122 static void stream_cycle_channel(VideoState *is, int codec_type)
3123 {
3124     AVFormatContext *ic = is->ic;
3125     int start_index, stream_index;
3126     int old_index;
3127     AVStream *st;
3128     AVProgram *p = NULL;
3129     int nb_streams = is->ic->nb_streams;
3130
3131     if (codec_type == AVMEDIA_TYPE_VIDEO) {
3132         start_index = is->last_video_stream;
3133         old_index = is->video_stream;
3134     } else if (codec_type == AVMEDIA_TYPE_AUDIO) {
3135         start_index = is->last_audio_stream;
3136         old_index = is->audio_stream;
3137     } else {
3138         start_index = is->last_subtitle_stream;
3139         old_index = is->subtitle_stream;
3140     }
3141     stream_index = start_index;
3142
3143     if (codec_type != AVMEDIA_TYPE_VIDEO && is->video_stream != -1) {
3144         p = av_find_program_from_stream(ic, NULL, is->video_stream);
3145         if (p) {
3146             nb_streams = p->nb_stream_indexes;
3147             for (start_index = 0; start_index < nb_streams; start_index++)
3148                 if (p->stream_index[start_index] == stream_index)
3149                     break;
3150             if (start_index == nb_streams)
3151                 start_index = -1;
3152             stream_index = start_index;
3153         }
3154     }
3155
3156     for (;;) {
3157         if (++stream_index >= nb_streams)
3158         {
3159             if (codec_type == AVMEDIA_TYPE_SUBTITLE)
3160             {
3161                 stream_index = -1;
3162                 is->last_subtitle_stream = -1;
3163                 goto the_end;
3164             }
3165             if (start_index == -1)
3166                 return;
3167             stream_index = 0;
3168         }
3169         if (stream_index == start_index)
3170             return;
3171         st = is->ic->streams[p ? p->stream_index[stream_index] : stream_index];
3172         if (st->codecpar->codec_type == codec_type) {
3173             /* check that parameters are OK */
3174             switch (codec_type) {
3175             case AVMEDIA_TYPE_AUDIO:
3176                 if (st->codecpar->sample_rate != 0 &&
3177                     st->codecpar->channels != 0)
3178                     goto the_end;
3179                 break;
3180             case AVMEDIA_TYPE_VIDEO:
3181             case AVMEDIA_TYPE_SUBTITLE:
3182                 goto the_end;
3183             default:
3184                 break;
3185             }
3186         }
3187     }
3188  the_end:
3189     if (p && stream_index != -1)
3190         stream_index = p->stream_index[stream_index];
3191     av_log(NULL, AV_LOG_INFO, "Switch %s stream from #%d to #%d\n",
3192            av_get_media_type_string(codec_type),
3193            old_index,
3194            stream_index);
3195
3196     stream_component_close(is, old_index);
3197     stream_component_open(is, stream_index);
3198 }
3199
3200
3201 static void toggle_full_screen(VideoState *is)
3202 {
3203     is_full_screen = !is_full_screen;
3204     SDL_SetWindowFullscreen(window, is_full_screen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
3205 }
3206
3207 static void toggle_audio_display(VideoState *is)
3208 {
3209     int next = is->show_mode;
3210     do {
3211         next = (next + 1) % SHOW_MODE_NB;
3212     } while (next != is->show_mode && (next == SHOW_MODE_VIDEO && !is->video_st || next != SHOW_MODE_VIDEO && !is->audio_st));
3213     if (is->show_mode != next) {
3214         is->force_refresh = 1;
3215         is->show_mode = next;
3216     }
3217 }
3218
3219 static void refresh_loop_wait_event(VideoState *is, SDL_Event *event) {
3220     double remaining_time = 0.0;
3221     SDL_PumpEvents();
3222     while (!SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_FIRSTEVENT, SDL_LASTEVENT)) {
3223         if (!cursor_hidden && av_gettime_relative() - cursor_last_shown > CURSOR_HIDE_DELAY) {
3224             SDL_ShowCursor(0);
3225             cursor_hidden = 1;
3226         }
3227         if (remaining_time > 0.0)
3228             av_usleep((int64_t)(remaining_time * 1000000.0));
3229         remaining_time = REFRESH_RATE;
3230         if (is->show_mode != SHOW_MODE_NONE && (!is->paused || is->force_refresh))
3231             video_refresh(is, &remaining_time);
3232         SDL_PumpEvents();
3233     }
3234 }
3235
3236 static void seek_chapter(VideoState *is, int incr)
3237 {
3238     int64_t pos = get_master_clock(is) * AV_TIME_BASE;
3239     int i;
3240
3241     if (!is->ic->nb_chapters)
3242         return;
3243
3244     /* find the current chapter */
3245     for (i = 0; i < is->ic->nb_chapters; i++) {
3246         AVChapter *ch = is->ic->chapters[i];
3247         if (av_compare_ts(pos, AV_TIME_BASE_Q, ch->start, ch->time_base) < 0) {
3248             i--;
3249             break;
3250         }
3251     }
3252
3253     i += incr;
3254     i = FFMAX(i, 0);
3255     if (i >= is->ic->nb_chapters)
3256         return;
3257
3258     av_log(NULL, AV_LOG_VERBOSE, "Seeking to chapter %d.\n", i);
3259     stream_seek(is, av_rescale_q(is->ic->chapters[i]->start, is->ic->chapters[i]->time_base,
3260                                  AV_TIME_BASE_Q), 0, 0);
3261 }
3262
3263 /* handle an event sent by the GUI */
3264 static void event_loop(VideoState *cur_stream)
3265 {
3266     SDL_Event event;
3267     double incr, pos, frac;
3268
3269     for (;;) {
3270         double x;
3271         refresh_loop_wait_event(cur_stream, &event);
3272         switch (event.type) {
3273         case SDL_KEYDOWN:
3274             if (exit_on_keydown || event.key.keysym.sym == SDLK_ESCAPE || event.key.keysym.sym == SDLK_q) {
3275                 do_exit(cur_stream);
3276                 break;
3277             }
3278             // If we don't yet have a window, skip all key events, because read_thread might still be initializing...
3279             if (!cur_stream->width)
3280                 continue;
3281             switch (event.key.keysym.sym) {
3282             case SDLK_f:
3283                 toggle_full_screen(cur_stream);
3284                 cur_stream->force_refresh = 1;
3285                 break;
3286             case SDLK_p:
3287             case SDLK_SPACE:
3288                 toggle_pause(cur_stream);
3289                 break;
3290             case SDLK_m:
3291                 toggle_mute(cur_stream);
3292                 break;
3293             case SDLK_KP_MULTIPLY:
3294             case SDLK_0:
3295                 update_volume(cur_stream, 1, SDL_VOLUME_STEP);
3296                 break;
3297             case SDLK_KP_DIVIDE:
3298             case SDLK_9:
3299                 update_volume(cur_stream, -1, SDL_VOLUME_STEP);
3300                 break;
3301             case SDLK_s: // S: Step to next frame
3302                 step_to_next_frame(cur_stream);
3303                 break;
3304             case SDLK_a:
3305                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3306                 break;
3307             case SDLK_v:
3308                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3309                 break;
3310             case SDLK_c:
3311                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3312                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3313                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3314                 break;
3315             case SDLK_t:
3316                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3317                 break;
3318             case SDLK_w:
3319 #if CONFIG_AVFILTER
3320                 if (cur_stream->show_mode == SHOW_MODE_VIDEO && cur_stream->vfilter_idx < nb_vfilters - 1) {
3321                     if (++cur_stream->vfilter_idx >= nb_vfilters)
3322                         cur_stream->vfilter_idx = 0;
3323                 } else {
3324                     cur_stream->vfilter_idx = 0;
3325                     toggle_audio_display(cur_stream);
3326                 }
3327 #else
3328                 toggle_audio_display(cur_stream);
3329 #endif
3330                 break;
3331             case SDLK_PAGEUP:
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_PAGEDOWN:
3339                 if (cur_stream->ic->nb_chapters <= 1) {
3340                     incr = -600.0;
3341                     goto do_seek;
3342                 }
3343                 seek_chapter(cur_stream, -1);
3344                 break;
3345             case SDLK_LEFT:
3346                 incr = -10.0;
3347                 goto do_seek;
3348             case SDLK_RIGHT:
3349                 incr = 10.0;
3350                 goto do_seek;
3351             case SDLK_UP:
3352                 incr = 60.0;
3353                 goto do_seek;
3354             case SDLK_DOWN:
3355                 incr = -60.0;
3356             do_seek:
3357                     if (seek_by_bytes) {
3358                         pos = -1;
3359                         if (pos < 0 && cur_stream->video_stream >= 0)
3360                             pos = frame_queue_last_pos(&cur_stream->pictq);
3361                         if (pos < 0 && cur_stream->audio_stream >= 0)
3362                             pos = frame_queue_last_pos(&cur_stream->sampq);
3363                         if (pos < 0)
3364                             pos = avio_tell(cur_stream->ic->pb);
3365                         if (cur_stream->ic->bit_rate)
3366                             incr *= cur_stream->ic->bit_rate / 8.0;
3367                         else
3368                             incr *= 180000.0;
3369                         pos += incr;
3370                         stream_seek(cur_stream, pos, incr, 1);
3371                     } else {
3372                         pos = get_master_clock(cur_stream);
3373                         if (isnan(pos))
3374                             pos = (double)cur_stream->seek_pos / AV_TIME_BASE;
3375                         pos += incr;
3376                         if (cur_stream->ic->start_time != AV_NOPTS_VALUE && pos < cur_stream->ic->start_time / (double)AV_TIME_BASE)
3377                             pos = cur_stream->ic->start_time / (double)AV_TIME_BASE;
3378                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
3379                     }
3380                 break;
3381             default:
3382                 break;
3383             }
3384             break;
3385         case SDL_MOUSEBUTTONDOWN:
3386             if (exit_on_mousedown) {
3387                 do_exit(cur_stream);
3388                 break;
3389             }
3390             if (event.button.button == SDL_BUTTON_LEFT) {
3391                 static int64_t last_mouse_left_click = 0;
3392                 if (av_gettime_relative() - last_mouse_left_click <= 500000) {
3393                     toggle_full_screen(cur_stream);
3394                     cur_stream->force_refresh = 1;
3395                     last_mouse_left_click = 0;
3396                 } else {
3397                     last_mouse_left_click = av_gettime_relative();
3398                 }
3399             }
3400         case SDL_MOUSEMOTION:
3401             if (cursor_hidden) {
3402                 SDL_ShowCursor(1);
3403                 cursor_hidden = 0;
3404             }
3405             cursor_last_shown = av_gettime_relative();
3406             if (event.type == SDL_MOUSEBUTTONDOWN) {
3407                 if (event.button.button != SDL_BUTTON_RIGHT)
3408                     break;
3409                 x = event.button.x;
3410             } else {
3411                 if (!(event.motion.state & SDL_BUTTON_RMASK))
3412                     break;
3413                 x = event.motion.x;
3414             }
3415                 if (seek_by_bytes || cur_stream->ic->duration <= 0) {
3416                     uint64_t size =  avio_size(cur_stream->ic->pb);
3417                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
3418                 } else {
3419                     int64_t ts;
3420                     int ns, hh, mm, ss;
3421                     int tns, thh, tmm, tss;
3422                     tns  = cur_stream->ic->duration / 1000000LL;
3423                     thh  = tns / 3600;
3424                     tmm  = (tns % 3600) / 60;
3425                     tss  = (tns % 60);
3426                     frac = x / cur_stream->width;
3427                     ns   = frac * tns;
3428                     hh   = ns / 3600;
3429                     mm   = (ns % 3600) / 60;
3430                     ss   = (ns % 60);
3431                     av_log(NULL, AV_LOG_INFO,
3432                            "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
3433                             hh, mm, ss, thh, tmm, tss);
3434                     ts = frac * cur_stream->ic->duration;
3435                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
3436                         ts += cur_stream->ic->start_time;
3437                     stream_seek(cur_stream, ts, 0, 0);
3438                 }
3439             break;
3440         case SDL_WINDOWEVENT:
3441             switch (event.window.event) {
3442                 case SDL_WINDOWEVENT_RESIZED:
3443                     screen_width  = cur_stream->width  = event.window.data1;
3444                     screen_height = cur_stream->height = event.window.data2;
3445                     if (cur_stream->vis_texture) {
3446                         SDL_DestroyTexture(cur_stream->vis_texture);
3447                         cur_stream->vis_texture = NULL;
3448                     }
3449                 case SDL_WINDOWEVENT_EXPOSED:
3450                     cur_stream->force_refresh = 1;
3451             }
3452             break;
3453         case SDL_QUIT:
3454         case FF_QUIT_EVENT:
3455             do_exit(cur_stream);
3456             break;
3457         default:
3458             break;
3459         }
3460     }
3461 }
3462
3463 static int opt_frame_size(void *optctx, const char *opt, const char *arg)
3464 {
3465     av_log(NULL, AV_LOG_WARNING, "Option -s is deprecated, use -video_size.\n");
3466     return opt_default(NULL, "video_size", arg);
3467 }
3468
3469 static int opt_width(void *optctx, const char *opt, const char *arg)
3470 {
3471     screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3472     return 0;
3473 }
3474
3475 static int opt_height(void *optctx, const char *opt, const char *arg)
3476 {
3477     screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3478     return 0;
3479 }
3480
3481 static int opt_format(void *optctx, const char *opt, const char *arg)
3482 {
3483     file_iformat = av_find_input_format(arg);
3484     if (!file_iformat) {
3485         av_log(NULL, AV_LOG_FATAL, "Unknown input format: %s\n", arg);
3486         return AVERROR(EINVAL);
3487     }
3488     return 0;
3489 }
3490
3491 static int opt_frame_pix_fmt(void *optctx, const char *opt, const char *arg)
3492 {
3493     av_log(NULL, AV_LOG_WARNING, "Option -pix_fmt is deprecated, use -pixel_format.\n");
3494     return opt_default(NULL, "pixel_format", arg);
3495 }
3496
3497 static int opt_sync(void *optctx, const char *opt, const char *arg)
3498 {
3499     if (!strcmp(arg, "audio"))
3500         av_sync_type = AV_SYNC_AUDIO_MASTER;
3501     else if (!strcmp(arg, "video"))
3502         av_sync_type = AV_SYNC_VIDEO_MASTER;
3503     else if (!strcmp(arg, "ext"))
3504         av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
3505     else {
3506         av_log(NULL, AV_LOG_ERROR, "Unknown value for %s: %s\n", opt, arg);
3507         exit(1);
3508     }
3509     return 0;
3510 }
3511
3512 static int opt_seek(void *optctx, const char *opt, const char *arg)
3513 {
3514     start_time = parse_time_or_die(opt, arg, 1);
3515     return 0;
3516 }
3517
3518 static int opt_duration(void *optctx, const char *opt, const char *arg)
3519 {
3520     duration = parse_time_or_die(opt, arg, 1);
3521     return 0;
3522 }
3523
3524 static int opt_show_mode(void *optctx, const char *opt, const char *arg)
3525 {
3526     show_mode = !strcmp(arg, "video") ? SHOW_MODE_VIDEO :
3527                 !strcmp(arg, "waves") ? SHOW_MODE_WAVES :
3528                 !strcmp(arg, "rdft" ) ? SHOW_MODE_RDFT  :
3529                 parse_number_or_die(opt, arg, OPT_INT, 0, SHOW_MODE_NB-1);
3530     return 0;
3531 }
3532
3533 static void opt_input_file(void *optctx, const char *filename)
3534 {
3535     if (input_filename) {
3536         av_log(NULL, AV_LOG_FATAL,
3537                "Argument '%s' provided as input filename, but '%s' was already specified.\n",
3538                 filename, input_filename);
3539         exit(1);
3540     }
3541     if (!strcmp(filename, "-"))
3542         filename = "pipe:";
3543     input_filename = filename;
3544 }
3545
3546 static int opt_codec(void *optctx, const char *opt, const char *arg)
3547 {
3548    const char *spec = strchr(opt, ':');
3549    if (!spec) {
3550        av_log(NULL, AV_LOG_ERROR,
3551               "No media specifier was specified in '%s' in option '%s'\n",
3552                arg, opt);
3553        return AVERROR(EINVAL);
3554    }
3555    spec++;
3556    switch (spec[0]) {
3557    case 'a' :    audio_codec_name = arg; break;
3558    case 's' : subtitle_codec_name = arg; break;
3559    case 'v' :    video_codec_name = arg; break;
3560    default:
3561        av_log(NULL, AV_LOG_ERROR,
3562               "Invalid media specifier '%s' in option '%s'\n", spec, opt);
3563        return AVERROR(EINVAL);
3564    }
3565    return 0;
3566 }
3567
3568 static int dummy;
3569
3570 static const OptionDef options[] = {
3571     CMDUTILS_COMMON_OPTIONS
3572     { "x", HAS_ARG, { .func_arg = opt_width }, "force displayed width", "width" },
3573     { "y", HAS_ARG, { .func_arg = opt_height }, "force displayed height", "height" },
3574     { "s", HAS_ARG | OPT_VIDEO, { .func_arg = opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
3575     { "fs", OPT_BOOL, { &is_full_screen }, "force full screen" },
3576     { "an", OPT_BOOL, { &audio_disable }, "disable audio" },
3577     { "vn", OPT_BOOL, { &video_disable }, "disable video" },
3578     { "sn", OPT_BOOL, { &subtitle_disable }, "disable subtitling" },
3579     { "ast", OPT_STRING | HAS_ARG | OPT_EXPERT, { &wanted_stream_spec[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_specifier" },
3580     { "vst", OPT_STRING | HAS_ARG | OPT_EXPERT, { &wanted_stream_spec[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_specifier" },
3581     { "sst", OPT_STRING | HAS_ARG | OPT_EXPERT, { &wanted_stream_spec[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_specifier" },
3582     { "ss", HAS_ARG, { .func_arg = opt_seek }, "seek to a given position in seconds", "pos" },
3583     { "t", HAS_ARG, { .func_arg = opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
3584     { "bytes", OPT_INT | HAS_ARG, { &seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
3585     { "nodisp", OPT_BOOL, { &display_disable }, "disable graphical display" },
3586     { "noborder", OPT_BOOL, { &borderless }, "borderless window" },
3587     { "volume", OPT_INT | HAS_ARG, { &startup_volume}, "set startup volume 0=min 100=max", "volume" },
3588     { "f", HAS_ARG, { .func_arg = opt_format }, "force format", "fmt" },
3589     { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_frame_pix_fmt }, "set pixel format", "format" },
3590     { "stats", OPT_BOOL | OPT_EXPERT, { &show_status }, "show status", "" },
3591     { "fast", OPT_BOOL | OPT_EXPERT, { &fast }, "non spec compliant optimizations", "" },
3592     { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
3593     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
3594     { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, { &lowres }, "", "" },
3595     { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
3596     { "autoexit", OPT_BOOL | OPT_EXPERT, { &autoexit }, "exit at the end", "" },
3597     { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { &exit_on_keydown }, "exit on key down", "" },
3598     { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { &exit_on_mousedown }, "exit on mouse down", "" },
3599     { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { &loop }, "set number of times the playback shall be looped", "loop count" },
3600     { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
3601     { "infbuf", OPT_BOOL | OPT_EXPERT, { &infinite_buffer }, "don't limit the input buffer size (useful with realtime streams)", "" },
3602     { "window_title", OPT_STRING | HAS_ARG, { &window_title }, "set window title", "window title" },
3603 #if CONFIG_AVFILTER
3604     { "vf", OPT_EXPERT | HAS_ARG, { .func_arg = opt_add_vfilter }, "set video filters", "filter_graph" },
3605     { "af", OPT_STRING | HAS_ARG, { &afilters }, "set audio filters", "filter_graph" },
3606 #endif
3607     { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { &rdftspeed }, "rdft speed", "msecs" },
3608     { "showmode", HAS_ARG, { .func_arg = opt_show_mode}, "select show mode (0 = video, 1 = waves, 2 = RDFT)", "mode" },
3609     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { .func_arg = opt_default }, "generic catch all option", "" },
3610     { "i", OPT_BOOL, { &dummy}, "read specified file", "input_file"},
3611     { "codec", HAS_ARG, { .func_arg = opt_codec}, "force decoder", "decoder_name" },
3612     { "acodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &audio_codec_name }, "force audio decoder",    "decoder_name" },
3613     { "scodec", HAS_ARG | OPT_STRING | OPT_EXPERT, { &subtitle_codec_name }, "force subtitle decoder", "decoder_name" },
3614     { "vcodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &video_codec_name }, "force video decoder",    "decoder_name" },
3615     { "autorotate", OPT_BOOL, { &autorotate }, "automatically rotate video", "" },
3616     { "find_stream_info", OPT_BOOL | OPT_INPUT | OPT_EXPERT, { &find_stream_info },
3617         "read and decode the streams to fill missing information with heuristics" },
3618     { NULL, },
3619 };
3620
3621 static void show_usage(void)
3622 {
3623     av_log(NULL, AV_LOG_INFO, "Simple media player\n");
3624     av_log(NULL, AV_LOG_INFO, "usage: %s [options] input_file\n", program_name);
3625     av_log(NULL, AV_LOG_INFO, "\n");
3626 }
3627
3628 void show_help_default(const char *opt, const char *arg)
3629 {
3630     av_log_set_callback(log_callback_help);
3631     show_usage();
3632     show_help_options(options, "Main options:", 0, OPT_EXPERT, 0);
3633     show_help_options(options, "Advanced options:", OPT_EXPERT, 0, 0);
3634     printf("\n");
3635     show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3636     show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3637 #if !CONFIG_AVFILTER
3638     show_help_children(sws_get_class(), AV_OPT_FLAG_ENCODING_PARAM);
3639 #else
3640     show_help_children(avfilter_get_class(), AV_OPT_FLAG_FILTERING_PARAM);
3641 #endif
3642     printf("\nWhile playing:\n"
3643            "q, ESC              quit\n"
3644            "f                   toggle full screen\n"
3645            "p, SPC              pause\n"
3646            "m                   toggle mute\n"
3647            "9, 0                decrease and increase volume respectively\n"
3648            "/, *                decrease and increase volume respectively\n"
3649            "a                   cycle audio channel in the current program\n"
3650            "v                   cycle video channel\n"
3651            "t                   cycle subtitle channel in the current program\n"
3652            "c                   cycle program\n"
3653            "w                   cycle video filters or show modes\n"
3654            "s                   activate frame-step mode\n"
3655            "left/right          seek backward/forward 10 seconds\n"
3656            "down/up             seek backward/forward 1 minute\n"
3657            "page down/page up   seek backward/forward 10 minutes\n"
3658            "right mouse click   seek to percentage in file corresponding to fraction of width\n"
3659            "left double-click   toggle full screen\n"
3660            );
3661 }
3662
3663 /* Called from the main */
3664 int main(int argc, char **argv)
3665 {
3666     int flags;
3667     VideoState *is;
3668
3669     init_dynload();
3670
3671     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3672     parse_loglevel(argc, argv, options);
3673
3674     /* register all codecs, demux and protocols */
3675 #if CONFIG_AVDEVICE
3676     avdevice_register_all();
3677 #endif
3678     avformat_network_init();
3679
3680     init_opts();
3681
3682     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
3683     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
3684
3685     show_banner(argc, argv, options);
3686
3687     parse_options(NULL, argc, argv, options, opt_input_file);
3688
3689     if (!input_filename) {
3690         show_usage();
3691         av_log(NULL, AV_LOG_FATAL, "An input file must be specified\n");
3692         av_log(NULL, AV_LOG_FATAL,
3693                "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3694         exit(1);
3695     }
3696
3697     if (display_disable) {
3698         video_disable = 1;
3699     }
3700     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
3701     if (audio_disable)
3702         flags &= ~SDL_INIT_AUDIO;
3703     else {
3704         /* Try to work around an occasional ALSA buffer underflow issue when the
3705          * period size is NPOT due to ALSA resampling by forcing the buffer size. */
3706         if (!SDL_getenv("SDL_AUDIO_ALSA_SET_BUFFER_SIZE"))
3707             SDL_setenv("SDL_AUDIO_ALSA_SET_BUFFER_SIZE","1", 1);
3708     }
3709     if (display_disable)
3710         flags &= ~SDL_INIT_VIDEO;
3711     if (SDL_Init (flags)) {
3712         av_log(NULL, AV_LOG_FATAL, "Could not initialize SDL - %s\n", SDL_GetError());
3713         av_log(NULL, AV_LOG_FATAL, "(Did you set the DISPLAY variable?)\n");
3714         exit(1);
3715     }
3716
3717     SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
3718     SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
3719
3720     av_init_packet(&flush_pkt);
3721     flush_pkt.data = (uint8_t *)&flush_pkt;
3722
3723     if (!display_disable) {
3724         int flags = SDL_WINDOW_HIDDEN;
3725         if (borderless)
3726             flags |= SDL_WINDOW_BORDERLESS;
3727         else
3728             flags |= SDL_WINDOW_RESIZABLE;
3729         window = SDL_CreateWindow(program_name, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, default_width, default_height, flags);
3730         SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
3731         if (window) {
3732             renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
3733             if (!renderer) {
3734                 av_log(NULL, AV_LOG_WARNING, "Failed to initialize a hardware accelerated renderer: %s\n", SDL_GetError());
3735                 renderer = SDL_CreateRenderer(window, -1, 0);
3736             }
3737             if (renderer) {
3738                 if (!SDL_GetRendererInfo(renderer, &renderer_info))
3739                     av_log(NULL, AV_LOG_VERBOSE, "Initialized %s renderer.\n", renderer_info.name);
3740             }
3741         }
3742         if (!window || !renderer || !renderer_info.num_texture_formats) {
3743             av_log(NULL, AV_LOG_FATAL, "Failed to create window or renderer: %s", SDL_GetError());
3744             do_exit(NULL);
3745         }
3746     }
3747
3748     is = stream_open(input_filename, file_iformat);
3749     if (!is) {
3750         av_log(NULL, AV_LOG_FATAL, "Failed to initialize VideoState!\n");
3751         do_exit(NULL);
3752     }
3753
3754     event_loop(is);
3755
3756     /* never returns */
3757
3758     return 0;
3759 }