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
 365 static const struct TextureFormatEntry {
 366     enum AVPixelFormat format;
 367     int texture_fmt;
 368 } sdl_texture_format_map[] = {
 369     { AV_PIX_FMT_RGB8,           SDL_PIXELFORMAT_RGB332 },
 370     { AV_PIX_FMT_RGB444,         SDL_PIXELFORMAT_RGB444 },
 371     { AV_PIX_FMT_RGB555,         SDL_PIXELFORMAT_RGB555 },
 372     { AV_PIX_FMT_BGR555,         SDL_PIXELFORMAT_BGR555 },
 373     { AV_PIX_FMT_RGB565,         SDL_PIXELFORMAT_RGB565 },
 374     { AV_PIX_FMT_BGR565,         SDL_PIXELFORMAT_BGR565 },
 375     { AV_PIX_FMT_RGB24,          SDL_PIXELFORMAT_RGB24 },
 376     { AV_PIX_FMT_BGR24,          SDL_PIXELFORMAT_BGR24 },
 377     { AV_PIX_FMT_0RGB32,         SDL_PIXELFORMAT_RGB888 },
 378     { AV_PIX_FMT_0BGR32,         SDL_PIXELFORMAT_BGR888 },
 379     { AV_PIX_FMT_NE(RGB0, 0BGR), SDL_PIXELFORMAT_RGBX8888 },
 380     { AV_PIX_FMT_NE(BGR0, 0RGB), SDL_PIXELFORMAT_BGRX8888 },
 381     { AV_PIX_FMT_RGB32,          SDL_PIXELFORMAT_ARGB8888 },
 382     { AV_PIX_FMT_RGB32_1,        SDL_PIXELFORMAT_RGBA8888 },
 383     { AV_PIX_FMT_BGR32,          SDL_PIXELFORMAT_ABGR8888 },
 384     { AV_PIX_FMT_BGR32_1,        SDL_PIXELFORMAT_BGRA8888 },
 385     { AV_PIX_FMT_YUV420P,        SDL_PIXELFORMAT_IYUV },
 386     { AV_PIX_FMT_YUYV422,        SDL_PIXELFORMAT_YUY2 },
 387     { AV_PIX_FMT_UYVY422,        SDL_PIXELFORMAT_UYVY },
 388     { AV_PIX_FMT_NONE,           SDL_PIXELFORMAT_UNKNOWN },
 389 };
 390
 391 #if CONFIG_AVFILTER
 392 static int opt_add_vfilter(void *optctx, const char *opt, const char *arg)
 393 {
 394     GROW_ARRAY(vfilters_list, nb_vfilters);
 395     vfilters_list[nb_vfilters - 1] = arg;
 396     return 0;
 397 }
 398 #endif
 399
 400 static inline
 401 int cmp_audio_fmts(enum AVSampleFormat fmt1, int64_t channel_count1,
 402                    enum AVSampleFormat fmt2, int64_t channel_count2)
 403 {
 404     /* If channel count == 1, planar and non-planar formats are the same */
 405     if (channel_count1 == 1 && channel_count2 == 1)
 406         return av_get_packed_sample_fmt(fmt1) != av_get_packed_sample_fmt(fmt2);
 407     else
 408         return channel_count1 != channel_count2 || fmt1 != fmt2;
 409 }
 410
 411 static inline
 412 int64_t get_valid_channel_layout(int64_t channel_layout, int channels)
 413 {
 414     if (channel_layout && av_get_channel_layout_nb_channels(channel_layout) == channels)
 415         return channel_layout;
 416     else
 417         return 0;
 418 }
 419
 420 static int packet_queue_put_private(PacketQueue *q, AVPacket *pkt)
 421 {
 422     MyAVPacketList *pkt1;
 423
 424     if (q->abort_request)
 425        return -1;
 426
 427     pkt1 = av_malloc(sizeof(MyAVPacketList));
 428     if (!pkt1)
 429         return -1;
 430     pkt1->pkt = *pkt;
 431     pkt1->next = NULL;
 432     if (pkt == &flush_pkt)
 433         q->serial++;
 434     pkt1->serial = q->serial;
 435
 436     if (!q->last_pkt)
 437         q->first_pkt = pkt1;
 438     else
 439         q->last_pkt->next = pkt1;
 440     q->last_pkt = pkt1;
 441     q->nb_packets++;
 442     q->size += pkt1->pkt.size + sizeof(*pkt1);
 443     q->duration += pkt1->pkt.duration;
 444     /* XXX: should duplicate packet data in DV case */
 445     SDL_CondSignal(q->cond);
 446     return 0;
 447 }
 448
 449 static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
 450 {
 451     int ret;
 452
 453     SDL_LockMutex(q->mutex);
 454     ret = packet_queue_put_private(q, pkt);
 455     SDL_UnlockMutex(q->mutex);
 456
 457     if (pkt != &flush_pkt && ret < 0)
 458         av_packet_unref(pkt);
 459
 460     return ret;
 461 }
 462
 463 static int packet_queue_put_nullpacket(PacketQueue *q, int stream_index)
 464 {
 465     AVPacket pkt1, *pkt = &pkt1;
 466     av_init_packet(pkt);
 467     pkt->data = NULL;
 468     pkt->size = 0;
 469     pkt->stream_index = stream_index;
 470     return packet_queue_put(q, pkt);
 471 }
 472
 473 /* packet queue handling */
 474 static int packet_queue_init(PacketQueue *q)
 475 {
 476     memset(q, 0, sizeof(PacketQueue));
 477     q->mutex = SDL_CreateMutex();
 478     if (!q->mutex) {
 479         av_log(NULL, AV_LOG_FATAL, "SDL_CreateMutex(): %s\n", SDL_GetError());
 480         return AVERROR(ENOMEM);
 481     }
 482     q->cond = SDL_CreateCond();
 483     if (!q->cond) {
 484         av_log(NULL, AV_LOG_FATAL, "SDL_CreateCond(): %s\n", SDL_GetError());
 485         return AVERROR(ENOMEM);
 486     }
 487     q->abort_request = 1;
 488     return 0;
 489 }
 490
 491 static void packet_queue_flush(PacketQueue *q)
 492 {
 493     MyAVPacketList *pkt, *pkt1;
 494
 495     SDL_LockMutex(q->mutex);
 496     for (pkt = q->first_pkt; pkt; pkt = pkt1) {
 497         pkt1 = pkt->next;
 498         av_packet_unref(&pkt->pkt);
 499         av_freep(&pkt);
 500     }
 501     q->last_pkt = NULL;
 502     q->first_pkt = NULL;
 503     q->nb_packets = 0;
 504     q->size = 0;
 505     q->duration = 0;
 506     SDL_UnlockMutex(q->mutex);
 507 }
 508
 509 static void packet_queue_destroy(PacketQueue *q)
 510 {
 511     packet_queue_flush(q);
 512     SDL_DestroyMutex(q->mutex);
 513     SDL_DestroyCond(q->cond);
 514 }
 515
 516 static void packet_queue_abort(PacketQueue *q)
 517 {
 518     SDL_LockMutex(q->mutex);
 519
 520     q->abort_request = 1;
 521
 522     SDL_CondSignal(q->cond);
 523
 524     SDL_UnlockMutex(q->mutex);
 525 }
 526
 527 static void packet_queue_start(PacketQueue *q)
 528 {
 529     SDL_LockMutex(q->mutex);
 530     q->abort_request = 0;
 531     packet_queue_put_private(q, &flush_pkt);
 532     SDL_UnlockMutex(q->mutex);
 533 }
 534
 535 /* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
 536 static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block, int *serial)
 537 {
 538     MyAVPacketList *pkt1;
 539     int ret;
 540
 541     SDL_LockMutex(q->mutex);
 542
 543     for (;;) {
 544         if (q->abort_request) {
 545             ret = -1;
 546             break;
 547         }
 548
 549         pkt1 = q->first_pkt;
 550         if (pkt1) {
 551             q->first_pkt = pkt1->next;
 552             if (!q->first_pkt)
 553                 q->last_pkt = NULL;
 554             q->nb_packets--;
 555             q->size -= pkt1->pkt.size + sizeof(*pkt1);
 556             q->duration -= pkt1->pkt.duration;
 557             *pkt = pkt1->pkt;
 558             if (serial)
 559                 *serial = pkt1->serial;
 560             av_free(pkt1);
 561             ret = 1;
 562             break;
 563         } else if (!block) {
 564             ret = 0;
 565             break;
 566         } else {
 567             SDL_CondWait(q->cond, q->mutex);
 568         }
 569     }
 570     SDL_UnlockMutex(q->mutex);
 571     return ret;
 572 }
 573
 574 static void decoder_init(Decoder *d, AVCodecContext *avctx, PacketQueue *queue, SDL_cond *empty_queue_cond) {
 575     memset(d, 0, sizeof(Decoder));
 576     d->avctx = avctx;
 577     d->queue = queue;
 578     d->empty_queue_cond = empty_queue_cond;
 579     d->start_pts = AV_NOPTS_VALUE;
 580     d->pkt_serial = -1;
 581 }
 582
 583 static int decoder_decode_frame(Decoder *d, AVFrame *frame, AVSubtitle *sub) {
 584     int ret = AVERROR(EAGAIN);
 585
 586     for (;;) {
 587         AVPacket pkt;
 588
 589         if (d->queue->serial == d->pkt_serial) {
 590             do {
 591                 if (d->queue->abort_request)
 592                     return -1;
 593
 594                 switch (d->avctx->codec_type) {
 595                     case AVMEDIA_TYPE_VIDEO:
 596                         ret = avcodec_receive_frame(d->avctx, frame);
 597                         if (ret >= 0) {
 598                             if (decoder_reorder_pts == -1) {
 599                                 frame->pts = frame->best_effort_timestamp;
 600                             } else if (!decoder_reorder_pts) {
 601                                 frame->pts = frame->pkt_dts;
 602                             }
 603                         }
 604                         break;
 605                     case AVMEDIA_TYPE_AUDIO:
 606                         ret = avcodec_receive_frame(d->avctx, frame);
 607                         if (ret >= 0) {
 608                             AVRational tb = (AVRational){1, frame->sample_rate};
 609                             if (frame->pts != AV_NOPTS_VALUE)
 610                                 frame->pts = av_rescale_q(frame->pts, av_codec_get_pkt_timebase(d->avctx), tb);
 611                             else if (d->next_pts != AV_NOPTS_VALUE)
 612                                 frame->pts = av_rescale_q(d->next_pts, d->next_pts_tb, tb);
 613                             if (frame->pts != AV_NOPTS_VALUE) {
 614                                 d->next_pts = frame->pts + frame->nb_samples;
 615                                 d->next_pts_tb = tb;
 616                             }
 617                         }
 618                         break;
 619                 }
 620                 if (ret == AVERROR_EOF) {
 621                     d->finished = d->pkt_serial;
 622                     avcodec_flush_buffers(d->avctx);
 623                     return 0;
 624                 }
 625                 if (ret >= 0)
 626                     return 1;
 627             } while (ret != AVERROR(EAGAIN));
 628         }
 629
 630         do {
 631             if (d->queue->nb_packets == 0)
 632                 SDL_CondSignal(d->empty_queue_cond);
 633             if (d->packet_pending) {
 634                 av_packet_move_ref(&pkt, &d->pkt);
 635                 d->packet_pending = 0;
 636             } else {
 637                 if (packet_queue_get(d->queue, &pkt, 1, &d->pkt_serial) < 0)
 638                     return -1;
 639             }
 640         } while (d->queue->serial != d->pkt_serial);
 641
 642         if (pkt.data == flush_pkt.data) {
 643             avcodec_flush_buffers(d->avctx);
 644             d->finished = 0;
 645             d->next_pts = d->start_pts;
 646             d->next_pts_tb = d->start_pts_tb;
 647         } else {
 648             if (d->avctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
 649                 int got_frame = 0;
 650                 ret = avcodec_decode_subtitle2(d->avctx, sub, &got_frame, &pkt);
 651                 if (ret < 0) {
 652                     ret = AVERROR(EAGAIN);
 653                 } else {
 654                     if (got_frame && !pkt.data) {
 655                        d->packet_pending = 1;
 656                        av_packet_move_ref(&d->pkt, &pkt);
 657                     }
 658                     ret = got_frame ? 0 : (pkt.data ? AVERROR(EAGAIN) : AVERROR_EOF);
 659                 }
 660             } else {
 661                 if (avcodec_send_packet(d->avctx, &pkt) == AVERROR(EAGAIN)) {
 662                     av_log(d->avctx, AV_LOG_ERROR, "Receive_frame and send_packet both returned EAGAIN, which is an API violation.\n");
 663                     d->packet_pending = 1;
 664                     av_packet_move_ref(&d->pkt, &pkt);
 665                 }
 666             }
 667             av_packet_unref(&pkt);
 668         }
 669     }
 670 }
 671
 672 static void decoder_destroy(Decoder *d) {
 673     av_packet_unref(&d->pkt);
 674     avcodec_free_context(&d->avctx);
 675 }
 676
 677 static void frame_queue_unref_item(Frame *vp)
 678 {
 679     av_frame_unref(vp->frame);
 680     avsubtitle_free(&vp->sub);
 681 }
 682
 683 static int frame_queue_init(FrameQueue *f, PacketQueue *pktq, int max_size, int keep_last)
 684 {
 685     int i;
 686     memset(f, 0, sizeof(FrameQueue));
 687     if (!(f->mutex = SDL_CreateMutex())) {
 688         av_log(NULL, AV_LOG_FATAL, "SDL_CreateMutex(): %s\n", SDL_GetError());
 689         return AVERROR(ENOMEM);
 690     }
 691     if (!(f->cond = SDL_CreateCond())) {
 692         av_log(NULL, AV_LOG_FATAL, "SDL_CreateCond(): %s\n", SDL_GetError());
 693         return AVERROR(ENOMEM);
 694     }
 695     f->pktq = pktq;
 696     f->max_size = FFMIN(max_size, FRAME_QUEUE_SIZE);
 697     f->keep_last = !!keep_last;
 698     for (i = 0; i < f->max_size; i++)
 699         if (!(f->queue[i].frame = av_frame_alloc()))
 700             return AVERROR(ENOMEM);
 701     return 0;
 702 }
 703
 704 static void frame_queue_destory(FrameQueue *f)
 705 {
 706     int i;
 707     for (i = 0; i < f->max_size; i++) {
 708         Frame *vp = &f->queue[i];
 709         frame_queue_unref_item(vp);
 710         av_frame_free(&vp->frame);
 711     }
 712     SDL_DestroyMutex(f->mutex);
 713     SDL_DestroyCond(f->cond);
 714 }
 715
 716 static void frame_queue_signal(FrameQueue *f)
 717 {
 718     SDL_LockMutex(f->mutex);
 719     SDL_CondSignal(f->cond);
 720     SDL_UnlockMutex(f->mutex);
 721 }
 722
 723 static Frame *frame_queue_peek(FrameQueue *f)
 724 {
 725     return &f->queue[(f->rindex + f->rindex_shown) % f->max_size];
 726 }
 727
 728 static Frame *frame_queue_peek_next(FrameQueue *f)
 729 {
 730     return &f->queue[(f->rindex + f->rindex_shown + 1) % f->max_size];
 731 }
 732
 733 static Frame *frame_queue_peek_last(FrameQueue *f)
 734 {
 735     return &f->queue[f->rindex];
 736 }
 737
 738 static Frame *frame_queue_peek_writable(FrameQueue *f)
 739 {
 740     /* wait until we have space to put a new frame */
 741     SDL_LockMutex(f->mutex);
 742     while (f->size >= f->max_size &&
 743            !f->pktq->abort_request) {
 744         SDL_CondWait(f->cond, f->mutex);
 745     }
 746     SDL_UnlockMutex(f->mutex);
 747
 748     if (f->pktq->abort_request)
 749         return NULL;
 750
 751     return &f->queue[f->windex];
 752 }
 753
 754 static Frame *frame_queue_peek_readable(FrameQueue *f)
 755 {
 756     /* wait until we have a readable a new frame */
 757     SDL_LockMutex(f->mutex);
 758     while (f->size - f->rindex_shown <= 0 &&
 759            !f->pktq->abort_request) {
 760         SDL_CondWait(f->cond, f->mutex);
 761     }
 762     SDL_UnlockMutex(f->mutex);
 763
 764     if (f->pktq->abort_request)
 765         return NULL;
 766
 767     return &f->queue[(f->rindex + f->rindex_shown) % f->max_size];
 768 }
 769
 770 static void frame_queue_push(FrameQueue *f)
 771 {
 772     if (++f->windex == f->max_size)
 773         f->windex = 0;
 774     SDL_LockMutex(f->mutex);
 775     f->size++;
 776     SDL_CondSignal(f->cond);
 777     SDL_UnlockMutex(f->mutex);
 778 }
 779
 780 static void frame_queue_next(FrameQueue *f)
 781 {
 782     if (f->keep_last && !f->rindex_shown) {
 783         f->rindex_shown = 1;
 784         return;
 785     }
 786     frame_queue_unref_item(&f->queue[f->rindex]);
 787     if (++f->rindex == f->max_size)
 788         f->rindex = 0;
 789     SDL_LockMutex(f->mutex);
 790     f->size--;
 791     SDL_CondSignal(f->cond);
 792     SDL_UnlockMutex(f->mutex);
 793 }
 794
 795 /* return the number of undisplayed frames in the queue */
 796 static int frame_queue_nb_remaining(FrameQueue *f)
 797 {
 798     return f->size - f->rindex_shown;
 799 }
 800
 801 /* return last shown position */
 802 static int64_t frame_queue_last_pos(FrameQueue *f)
 803 {
 804     Frame *fp = &f->queue[f->rindex];
 805     if (f->rindex_shown && fp->serial == f->pktq->serial)
 806         return fp->pos;
 807     else
 808         return -1;
 809 }
 810
 811 static void decoder_abort(Decoder *d, FrameQueue *fq)
 812 {
 813     packet_queue_abort(d->queue);
 814     frame_queue_signal(fq);
 815     SDL_WaitThread(d->decoder_tid, NULL);
 816     d->decoder_tid = NULL;
 817     packet_queue_flush(d->queue);
 818 }
 819
 820 static inline void fill_rectangle(int x, int y, int w, int h)
 821 {
 822     SDL_Rect rect;
 823     rect.x = x;
 824     rect.y = y;
 825     rect.w = w;
 826     rect.h = h;
 827     if (w && h)
 828         SDL_RenderFillRect(renderer, &rect);
 829 }
 830
 831 static int realloc_texture(SDL_Texture **texture, Uint32 new_format, int new_width, int new_height, SDL_BlendMode blendmode, int init_texture)
 832 {
 833     Uint32 format;
 834     int access, w, h;
 835     if (SDL_QueryTexture(*texture, &format, &access, &w, &h) < 0 || new_width != w || new_height != h || new_format != format) {
 836         void *pixels;
 837         int pitch;
 838         SDL_DestroyTexture(*texture);
 839         if (!(*texture = SDL_CreateTexture(renderer, new_format, SDL_TEXTUREACCESS_STREAMING, new_width, new_height)))
 840             return -1;
 841         if (SDL_SetTextureBlendMode(*texture, blendmode) < 0)
 842             return -1;
 843         if (init_texture) {
 844             if (SDL_LockTexture(*texture, NULL, &pixels, &pitch) < 0)
 845                 return -1;
 846             memset(pixels, 0, pitch * new_height);
 847             SDL_UnlockTexture(*texture);
 848         }
 849         av_log(NULL, AV_LOG_VERBOSE, "Created %dx%d texture with %s.\n", new_width, new_height, SDL_GetPixelFormatName(new_format));
 850     }
 851     return 0;
 852 }
 853
 854 static void calculate_display_rect(SDL_Rect *rect,
 855                                    int scr_xleft, int scr_ytop, int scr_width, int scr_height,
 856                                    int pic_width, int pic_height, AVRational pic_sar)
 857 {
 858     float aspect_ratio;
 859     int width, height, x, y;
 860
 861     if (pic_sar.num == 0)
 862         aspect_ratio = 0;
 863     else
 864         aspect_ratio = av_q2d(pic_sar);
 865
 866     if (aspect_ratio <= 0.0)
 867         aspect_ratio = 1.0;
 868     aspect_ratio *= (float)pic_width / (float)pic_height;
 869
 870     /* XXX: we suppose the screen has a 1.0 pixel ratio */
 871     height = scr_height;
 872     width = lrint(height * aspect_ratio) & ~1;
 873     if (width > scr_width) {
 874         width = scr_width;
 875         height = lrint(width / aspect_ratio) & ~1;
 876     }
 877     x = (scr_width - width) / 2;
 878     y = (scr_height - height) / 2;
 879     rect->x = scr_xleft + x;
 880     rect->y = scr_ytop  + y;
 881     rect->w = FFMAX(width,  1);
 882     rect->h = FFMAX(height, 1);
 883 }
 884
 885 static void get_sdl_pix_fmt_and_blendmode(int format, Uint32 *sdl_pix_fmt, SDL_BlendMode *sdl_blendmode)
 886 {
 887     int i;
 888     *sdl_blendmode = SDL_BLENDMODE_NONE;
 889     *sdl_pix_fmt = SDL_PIXELFORMAT_UNKNOWN;
 890     if (format == AV_PIX_FMT_RGB32   ||
 891         format == AV_PIX_FMT_RGB32_1 ||
 892         format == AV_PIX_FMT_BGR32   ||
 893         format == AV_PIX_FMT_BGR32_1)
 894         *sdl_blendmode = SDL_BLENDMODE_BLEND;
 895     for (i = 0; i < FF_ARRAY_ELEMS(sdl_texture_format_map) - 1; i++) {
 896         if (format == sdl_texture_format_map[i].format) {
 897             *sdl_pix_fmt = sdl_texture_format_map[i].texture_fmt;
 898             return;
 899         }
 900     }
 901 }
 902
 903 static int upload_texture(SDL_Texture **tex, AVFrame *frame, struct SwsContext **img_convert_ctx) {
 904     int ret = 0;
 905     Uint32 sdl_pix_fmt;
 906     SDL_BlendMode sdl_blendmode;
 907     get_sdl_pix_fmt_and_blendmode(frame->format, &sdl_pix_fmt, &sdl_blendmode);
 908     if (realloc_texture(tex, sdl_pix_fmt == SDL_PIXELFORMAT_UNKNOWN ? SDL_PIXELFORMAT_ARGB8888 : sdl_pix_fmt, frame->width, frame->height, sdl_blendmode, 0) < 0)
 909         return -1;
 910     switch (sdl_pix_fmt) {
 911         case SDL_PIXELFORMAT_UNKNOWN:
 912             /* This should only happen if we are not using avfilter... */
 913             *img_convert_ctx = sws_getCachedContext(*img_convert_ctx,
 914                 frame->width, frame->height, frame->format, frame->width, frame->height,
 915                 AV_PIX_FMT_BGRA, sws_flags, NULL, NULL, NULL);
 916             if (*img_convert_ctx != NULL) {
 917                 uint8_t *pixels[4];
 918                 int pitch[4];
 919                 if (!SDL_LockTexture(*tex, NULL, (void **)pixels, pitch)) {
 920                     sws_scale(*img_convert_ctx, (const uint8_t * const *)frame->data, frame->linesize,
 921                               0, frame->height, pixels, pitch);
 922                     SDL_UnlockTexture(*tex);
 923                 }
 924             } else {
 925                 av_log(NULL, AV_LOG_FATAL, "Cannot initialize the conversion context\n");
 926                 ret = -1;
 927             }
 928             break;
 929         case SDL_PIXELFORMAT_IYUV:
 930             if (frame->linesize[0] > 0 && frame->linesize[1] > 0 && frame->linesize[2] > 0) {
 931                 ret = SDL_UpdateYUVTexture(*tex, NULL, frame->data[0], frame->linesize[0],
 932                                                        frame->data[1], frame->linesize[1],
 933                                                        frame->data[2], frame->linesize[2]);
 934             } else if (frame->linesize[0] < 0 && frame->linesize[1] < 0 && frame->linesize[2] < 0) {
 935                 ret = SDL_UpdateYUVTexture(*tex, NULL, frame->data[0] + frame->linesize[0] * (frame->height                    - 1), -frame->linesize[0],
 936                                                        frame->data[1] + frame->linesize[1] * (AV_CEIL_RSHIFT(frame->height, 1) - 1), -frame->linesize[1],
 937                                                        frame->data[2] + frame->linesize[2] * (AV_CEIL_RSHIFT(frame->height, 1) - 1), -frame->linesize[2]);
 938             } else {
 939                 av_log(NULL, AV_LOG_ERROR, "Mixed negative and positive linesizes are not supported.\n");
 940                 return -1;
 941             }
 942             break;
 943         default:
 944             if (frame->linesize[0] < 0) {
 945                 ret = SDL_UpdateTexture(*tex, NULL, frame->data[0] + frame->linesize[0] * (frame->height - 1), -frame->linesize[0]);
 946             } else {
 947                 ret = SDL_UpdateTexture(*tex, NULL, frame->data[0], frame->linesize[0]);
 948             }
 949             break;
 950     }
 951     return ret;
 952 }
 953
 954 static void video_image_display(VideoState *is)
 955 {
 956     Frame *vp;
 957     Frame *sp = NULL;
 958     SDL_Rect rect;
 959
 960     vp = frame_queue_peek_last(&is->pictq);
 961     if (is->subtitle_st) {
 962         if (frame_queue_nb_remaining(&is->subpq) > 0) {
 963             sp = frame_queue_peek(&is->subpq);
 964
 965             if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000)) {
 966                 if (!sp->uploaded) {
 967                     uint8_t* pixels[4];
 968                     int pitch[4];
 969                     int i;
 970                     if (!sp->width || !sp->height) {
 971                         sp->width = vp->width;
 972                         sp->height = vp->height;
 973                     }
 974                     if (realloc_texture(&is->sub_texture, SDL_PIXELFORMAT_ARGB8888, sp->width, sp->height, SDL_BLENDMODE_BLEND, 1) < 0)
 975                         return;
 976
 977                     for (i = 0; i < sp->sub.num_rects; i++) {
 978                         AVSubtitleRect *sub_rect = sp->sub.rects[i];
 979
 980                         sub_rect->x = av_clip(sub_rect->x, 0, sp->width );
 981                         sub_rect->y = av_clip(sub_rect->y, 0, sp->height);
 982                         sub_rect->w = av_clip(sub_rect->w, 0, sp->width  - sub_rect->x);
 983                         sub_rect->h = av_clip(sub_rect->h, 0, sp->height - sub_rect->y);
 984
 985                         is->sub_convert_ctx = sws_getCachedContext(is->sub_convert_ctx,
 986                             sub_rect->w, sub_rect->h, AV_PIX_FMT_PAL8,
 987                             sub_rect->w, sub_rect->h, AV_PIX_FMT_BGRA,
 988                             0, NULL, NULL, NULL);
 989                         if (!is->sub_convert_ctx) {
 990                             av_log(NULL, AV_LOG_FATAL, "Cannot initialize the conversion context\n");
 991                             return;
 992                         }
 993                         if (!SDL_LockTexture(is->sub_texture, (SDL_Rect *)sub_rect, (void **)pixels, pitch)) {
 994                             sws_scale(is->sub_convert_ctx, (const uint8_t * const *)sub_rect->data, sub_rect->linesize,
 995                                       0, sub_rect->h, pixels, pitch);
 996                             SDL_UnlockTexture(is->sub_texture);
 997                         }
 998                     }
 999                     sp->uploaded = 1;
1000                 }
1001             } else
1002                 sp = NULL;
1003         }
1004     }
1005
1006     calculate_display_rect(&rect, is->xleft, is->ytop, is->width, is->height, vp->width, vp->height, vp->sar);
1007
1008     if (!vp->uploaded) {
1009         if (upload_texture(&is->vid_texture, vp->frame, &is->img_convert_ctx) < 0)
1010             return;
1011         vp->uploaded = 1;
1012         vp->flip_v = vp->frame->linesize[0] < 0;
1013     }
1014
1015     SDL_RenderCopyEx(renderer, is->vid_texture, NULL, &rect, 0, NULL, vp->flip_v ? SDL_FLIP_VERTICAL : 0);
1016     if (sp) {
1017 #if USE_ONEPASS_SUBTITLE_RENDER
1018         SDL_RenderCopy(renderer, is->sub_texture, NULL, &rect);
1019 #else
1020         int i;
1021         double xratio = (double)rect.w / (double)sp->width;
1022         double yratio = (double)rect.h / (double)sp->height;
1023         for (i = 0; i < sp->sub.num_rects; i++) {
1024             SDL_Rect *sub_rect = (SDL_Rect*)sp->sub.rects[i];
1025             SDL_Rect target = {.x = rect.x + sub_rect->x * xratio,
1026                                .y = rect.y + sub_rect->y * yratio,
1027                                .w = sub_rect->w * xratio,
1028                                .h = sub_rect->h * yratio};
1029             SDL_RenderCopy(renderer, is->sub_texture, sub_rect, &target);
1030         }
1031 #endif
1032     }
1033 }
1034
1035 static inline int compute_mod(int a, int b)
1036 {
1037     return a < 0 ? a%b + b : a%b;
1038 }
1039
1040 static void video_audio_display(VideoState *s)
1041 {
1042     int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
1043     int ch, channels, h, h2;
1044     int64_t time_diff;
1045     int rdft_bits, nb_freq;
1046
1047     for (rdft_bits = 1; (1 << rdft_bits) < 2 * s->height; rdft_bits++)
1048         ;
1049     nb_freq = 1 << (rdft_bits - 1);
1050
1051     /* compute display index : center on currently output samples */
1052     channels = s->audio_tgt.channels;
1053     nb_display_channels = channels;
1054     if (!s->paused) {
1055         int data_used= s->show_mode == SHOW_MODE_WAVES ? s->width : (2*nb_freq);
1056         n = 2 * channels;
1057         delay = s->audio_write_buf_size;
1058         delay /= n;
1059
1060         /* to be more precise, we take into account the time spent since
1061            the last buffer computation */
1062         if (audio_callback_time) {
1063             time_diff = av_gettime_relative() - audio_callback_time;
1064             delay -= (time_diff * s->audio_tgt.freq) / 1000000;
1065         }
1066
1067         delay += 2 * data_used;
1068         if (delay < data_used)
1069             delay = data_used;
1070
1071         i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
1072         if (s->show_mode == SHOW_MODE_WAVES) {
1073             h = INT_MIN;
1074             for (i = 0; i < 1000; i += channels) {
1075                 int idx = (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
1076                 int a = s->sample_array[idx];
1077                 int b = s->sample_array[(idx + 4 * channels) % SAMPLE_ARRAY_SIZE];
1078                 int c = s->sample_array[(idx + 5 * channels) % SAMPLE_ARRAY_SIZE];
1079                 int d = s->sample_array[(idx + 9 * channels) % SAMPLE_ARRAY_SIZE];
1080                 int score = a - d;
1081                 if (h < score && (b ^ c) < 0) {
1082                     h = score;
1083                     i_start = idx;
1084                 }
1085             }
1086         }
1087
1088         s->last_i_start = i_start;
1089     } else {
1090         i_start = s->last_i_start;
1091     }
1092
1093     if (s->show_mode == SHOW_MODE_WAVES) {
1094         SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
1095
1096         /* total height for one channel */
1097         h = s->height / nb_display_channels;
1098         /* graph height / 2 */
1099         h2 = (h * 9) / 20;
1100         for (ch = 0; ch < nb_display_channels; ch++) {
1101             i = i_start + ch;
1102             y1 = s->ytop + ch * h + (h / 2); /* position of center line */
1103             for (x = 0; x < s->width; x++) {
1104                 y = (s->sample_array[i] * h2) >> 15;
1105                 if (y < 0) {
1106                     y = -y;
1107                     ys = y1 - y;
1108                 } else {
1109                     ys = y1;
1110                 }
1111                 fill_rectangle(s->xleft + x, ys, 1, y);
1112                 i += channels;
1113                 if (i >= SAMPLE_ARRAY_SIZE)
1114                     i -= SAMPLE_ARRAY_SIZE;
1115             }
1116         }
1117
1118         SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255);
1119
1120         for (ch = 1; ch < nb_display_channels; ch++) {
1121             y = s->ytop + ch * h;
1122             fill_rectangle(s->xleft, y, s->width, 1);
1123         }
1124     } else {
1125         if (realloc_texture(&s->vis_texture, SDL_PIXELFORMAT_ARGB8888, s->width, s->height, SDL_BLENDMODE_NONE, 1) < 0)
1126             return;
1127
1128         nb_display_channels= FFMIN(nb_display_channels, 2);
1129         if (rdft_bits != s->rdft_bits) {
1130             av_rdft_end(s->rdft);
1131             av_free(s->rdft_data);
1132             s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
1133             s->rdft_bits = rdft_bits;
1134             s->rdft_data = av_malloc_array(nb_freq, 4 *sizeof(*s->rdft_data));
1135         }
1136         if (!s->rdft || !s->rdft_data){
1137             av_log(NULL, AV_LOG_ERROR, "Failed to allocate buffers for RDFT, switching to waves display\n");
1138             s->show_mode = SHOW_MODE_WAVES;
1139         } else {
1140             FFTSample *data[2];
1141             SDL_Rect rect = {.x = s->xpos, .y = 0, .w = 1, .h = s->height};
1142             uint32_t *pixels;
1143             int pitch;
1144             for (ch = 0; ch < nb_display_channels; ch++) {
1145                 data[ch] = s->rdft_data + 2 * nb_freq * ch;
1146                 i = i_start + ch;
1147                 for (x = 0; x < 2 * nb_freq; x++) {
1148                     double w = (x-nb_freq) * (1.0 / nb_freq);
1149                     data[ch][x] = s->sample_array[i] * (1.0 - w * w);
1150                     i += channels;
1151                     if (i >= SAMPLE_ARRAY_SIZE)
1152                         i -= SAMPLE_ARRAY_SIZE;
1153                 }
1154                 av_rdft_calc(s->rdft, data[ch]);
1155             }
1156             /* Least efficient way to do this, we should of course
1157              * directly access it but it is more than fast enough. */
1158             if (!SDL_LockTexture(s->vis_texture, &rect, (void **)&pixels, &pitch)) {
1159                 pitch >>= 2;
1160                 pixels += pitch * s->height;
1161                 for (y = 0; y < s->height; y++) {
1162                     double w = 1 / sqrt(nb_freq);
1163                     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]));
1164                     int b = (nb_display_channels == 2 ) ? sqrt(w * hypot(data[1][2 * y + 0], data[1][2 * y + 1]))
1165                                                         : a;
1166                     a = FFMIN(a, 255);
1167                     b = FFMIN(b, 255);
1168                     pixels -= pitch;
1169                     *pixels = (a << 16) + (b << 8) + ((a+b) >> 1);
1170                 }
1171                 SDL_UnlockTexture(s->vis_texture);
1172             }
1173             SDL_RenderCopy(renderer, s->vis_texture, NULL, NULL);
1174         }
1175         if (!s->paused)
1176             s->xpos++;
1177         if (s->xpos >= s->width)
1178             s->xpos= s->xleft;
1179     }
1180 }
1181
1182 static void stream_component_close(VideoState *is, int stream_index)
1183 {
1184     AVFormatContext *ic = is->ic;
1185     AVCodecParameters *codecpar;
1186
1187     if (stream_index < 0 || stream_index >= ic->nb_streams)
1188         return;
1189     codecpar = ic->streams[stream_index]->codecpar;
1190
1191     switch (codecpar->codec_type) {
1192     case AVMEDIA_TYPE_AUDIO:
1193         decoder_abort(&is->auddec, &is->sampq);
1194         SDL_CloseAudio();
1195         decoder_destroy(&is->auddec);
1196         swr_free(&is->swr_ctx);
1197         av_freep(&is->audio_buf1);
1198         is->audio_buf1_size = 0;
1199         is->audio_buf = NULL;
1200
1201         if (is->rdft) {
1202             av_rdft_end(is->rdft);
1203             av_freep(&is->rdft_data);
1204             is->rdft = NULL;
1205             is->rdft_bits = 0;
1206         }
1207         break;
1208     case AVMEDIA_TYPE_VIDEO:
1209         decoder_abort(&is->viddec, &is->pictq);
1210         decoder_destroy(&is->viddec);
1211         break;
1212     case AVMEDIA_TYPE_SUBTITLE:
1213         decoder_abort(&is->subdec, &is->subpq);
1214         decoder_destroy(&is->subdec);
1215         break;
1216     default:
1217         break;
1218     }
1219
1220     ic->streams[stream_index]->discard = AVDISCARD_ALL;
1221     switch (codecpar->codec_type) {
1222     case AVMEDIA_TYPE_AUDIO:
1223         is->audio_st = NULL;
1224         is->audio_stream = -1;
1225         break;
1226     case AVMEDIA_TYPE_VIDEO:
1227         is->video_st = NULL;
1228         is->video_stream = -1;
1229         break;
1230     case AVMEDIA_TYPE_SUBTITLE:
1231         is->subtitle_st = NULL;
1232         is->subtitle_stream = -1;
1233         break;
1234     default:
1235         break;
1236     }
1237 }
1238
1239 static void stream_close(VideoState *is)
1240 {
1241     /* XXX: use a special url_shutdown call to abort parse cleanly */
1242     is->abort_request = 1;
1243     SDL_WaitThread(is->read_tid, NULL);
1244
1245     /* close each stream */
1246     if (is->audio_stream >= 0)
1247         stream_component_close(is, is->audio_stream);
1248     if (is->video_stream >= 0)
1249         stream_component_close(is, is->video_stream);
1250     if (is->subtitle_stream >= 0)
1251         stream_component_close(is, is->subtitle_stream);
1252
1253     avformat_close_input(&is->ic);
1254
1255     packet_queue_destroy(&is->videoq);
1256     packet_queue_destroy(&is->audioq);
1257     packet_queue_destroy(&is->subtitleq);
1258
1259     /* free all pictures */
1260     frame_queue_destory(&is->pictq);
1261     frame_queue_destory(&is->sampq);
1262     frame_queue_destory(&is->subpq);
1263     SDL_DestroyCond(is->continue_read_thread);
1264     sws_freeContext(is->img_convert_ctx);
1265     sws_freeContext(is->sub_convert_ctx);
1266     av_free(is->filename);
1267     if (is->vis_texture)
1268         SDL_DestroyTexture(is->vis_texture);
1269     if (is->vid_texture)
1270         SDL_DestroyTexture(is->vid_texture);
1271     if (is->sub_texture)
1272         SDL_DestroyTexture(is->sub_texture);
1273     av_free(is);
1274 }
1275
1276 static void do_exit(VideoState *is)
1277 {
1278     if (is) {
1279         stream_close(is);
1280     }
1281     if (renderer)
1282         SDL_DestroyRenderer(renderer);
1283     if (window)
1284         SDL_DestroyWindow(window);
1285     av_lockmgr_register(NULL);
1286     uninit_opts();
1287 #if CONFIG_AVFILTER
1288     av_freep(&vfilters_list);
1289 #endif
1290     avformat_network_deinit();
1291     if (show_status)
1292         printf("\n");
1293     SDL_Quit();
1294     av_log(NULL, AV_LOG_QUIET, "%s", "");
1295     exit(0);
1296 }
1297
1298 static void sigterm_handler(int sig)
1299 {
1300     exit(123);
1301 }
1302
1303 static void set_default_window_size(int width, int height, AVRational sar)
1304 {
1305     SDL_Rect rect;
1306     calculate_display_rect(&rect, 0, 0, INT_MAX, height, width, height, sar);
1307     default_width  = rect.w;
1308     default_height = rect.h;
1309 }
1310
1311 static int video_open(VideoState *is)
1312 {
1313     int w,h;
1314
1315     if (screen_width) {
1316         w = screen_width;
1317         h = screen_height;
1318     } else {
1319         w = default_width;
1320         h = default_height;
1321     }
1322
1323     if (!window) {
1324         int flags = SDL_WINDOW_SHOWN;
1325         if (!window_title)
1326             window_title = input_filename;
1327         if (is_full_screen)
1328             flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
1329         if (borderless)
1330             flags |= SDL_WINDOW_BORDERLESS;
1331         else
1332             flags |= SDL_WINDOW_RESIZABLE;
1333         window = SDL_CreateWindow(window_title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, w, h, flags);
1334         SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
1335         if (window) {
1336             SDL_RendererInfo info;
1337             renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
1338             if (!renderer) {
1339                 av_log(NULL, AV_LOG_WARNING, "Failed to initialize a hardware accelerated renderer: %s\n", SDL_GetError());
1340                 renderer = SDL_CreateRenderer(window, -1, 0);
1341             }
1342             if (renderer) {
1343                 if (!SDL_GetRendererInfo(renderer, &info))
1344                     av_log(NULL, AV_LOG_VERBOSE, "Initialized %s renderer.\n", info.name);
1345             }
1346         }
1347     } else {
1348         SDL_SetWindowSize(window, w, h);
1349     }
1350
1351     if (!window || !renderer) {
1352         av_log(NULL, AV_LOG_FATAL, "SDL: could not set video mode - exiting\n");
1353         do_exit(is);
1354     }
1355
1356     is->width  = w;
1357     is->height = h;
1358
1359     return 0;
1360 }
1361
1362 /* display the current picture, if any */
1363 static void video_display(VideoState *is)
1364 {
1365     if (!window)
1366         video_open(is);
1367
1368     SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
1369     SDL_RenderClear(renderer);
1370     if (is->audio_st && is->show_mode != SHOW_MODE_VIDEO)
1371         video_audio_display(is);
1372     else if (is->video_st)
1373         video_image_display(is);
1374     SDL_RenderPresent(renderer);
1375 }
1376
1377 static double get_clock(Clock *c)
1378 {
1379     if (*c->queue_serial != c->serial)
1380         return NAN;
1381     if (c->paused) {
1382         return c->pts;
1383     } else {
1384         double time = av_gettime_relative() / 1000000.0;
1385         return c->pts_drift + time - (time - c->last_updated) * (1.0 - c->speed);
1386     }
1387 }
1388
1389 static void set_clock_at(Clock *c, double pts, int serial, double time)
1390 {
1391     c->pts = pts;
1392     c->last_updated = time;
1393     c->pts_drift = c->pts - time;
1394     c->serial = serial;
1395 }
1396
1397 static void set_clock(Clock *c, double pts, int serial)
1398 {
1399     double time = av_gettime_relative() / 1000000.0;
1400     set_clock_at(c, pts, serial, time);
1401 }
1402
1403 static void set_clock_speed(Clock *c, double speed)
1404 {
1405     set_clock(c, get_clock(c), c->serial);
1406     c->speed = speed;
1407 }
1408
1409 static void init_clock(Clock *c, int *queue_serial)
1410 {
1411     c->speed = 1.0;
1412     c->paused = 0;
1413     c->queue_serial = queue_serial;
1414     set_clock(c, NAN, -1);
1415 }
1416
1417 static void sync_clock_to_slave(Clock *c, Clock *slave)
1418 {
1419     double clock = get_clock(c);
1420     double slave_clock = get_clock(slave);
1421     if (!isnan(slave_clock) && (isnan(clock) || fabs(clock - slave_clock) > AV_NOSYNC_THRESHOLD))
1422         set_clock(c, slave_clock, slave->serial);
1423 }
1424
1425 static int get_master_sync_type(VideoState *is) {
1426     if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
1427         if (is->video_st)
1428             return AV_SYNC_VIDEO_MASTER;
1429         else
1430             return AV_SYNC_AUDIO_MASTER;
1431     } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
1432         if (is->audio_st)
1433             return AV_SYNC_AUDIO_MASTER;
1434         else
1435             return AV_SYNC_EXTERNAL_CLOCK;
1436     } else {
1437         return AV_SYNC_EXTERNAL_CLOCK;
1438     }
1439 }
1440
1441 /* get the current master clock value */
1442 static double get_master_clock(VideoState *is)
1443 {
1444     double val;
1445
1446     switch (get_master_sync_type(is)) {
1447         case AV_SYNC_VIDEO_MASTER:
1448             val = get_clock(&is->vidclk);
1449             break;
1450         case AV_SYNC_AUDIO_MASTER:
1451             val = get_clock(&is->audclk);
1452             break;
1453         default:
1454             val = get_clock(&is->extclk);
1455             break;
1456     }
1457     return val;
1458 }
1459
1460 static void check_external_clock_speed(VideoState *is) {
1461    if (is->video_stream >= 0 && is->videoq.nb_packets <= EXTERNAL_CLOCK_MIN_FRAMES ||
1462        is->audio_stream >= 0 && is->audioq.nb_packets <= EXTERNAL_CLOCK_MIN_FRAMES) {
1463        set_clock_speed(&is->extclk, FFMAX(EXTERNAL_CLOCK_SPEED_MIN, is->extclk.speed - EXTERNAL_CLOCK_SPEED_STEP));
1464    } else if ((is->video_stream < 0 || is->videoq.nb_packets > EXTERNAL_CLOCK_MAX_FRAMES) &&
1465               (is->audio_stream < 0 || is->audioq.nb_packets > EXTERNAL_CLOCK_MAX_FRAMES)) {
1466        set_clock_speed(&is->extclk, FFMIN(EXTERNAL_CLOCK_SPEED_MAX, is->extclk.speed + EXTERNAL_CLOCK_SPEED_STEP));
1467    } else {
1468        double speed = is->extclk.speed;
1469        if (speed != 1.0)
1470            set_clock_speed(&is->extclk, speed + EXTERNAL_CLOCK_SPEED_STEP * (1.0 - speed) / fabs(1.0 - speed));
1471    }
1472 }
1473
1474 /* seek in the stream */
1475 static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_bytes)
1476 {
1477     if (!is->seek_req) {
1478         is->seek_pos = pos;
1479         is->seek_rel = rel;
1480         is->seek_flags &= ~AVSEEK_FLAG_BYTE;
1481         if (seek_by_bytes)
1482             is->seek_flags |= AVSEEK_FLAG_BYTE;
1483         is->seek_req = 1;
1484         SDL_CondSignal(is->continue_read_thread);
1485     }
1486 }
1487
1488 /* pause or resume the video */
1489 static void stream_toggle_pause(VideoState *is)
1490 {
1491     if (is->paused) {
1492         is->frame_timer += av_gettime_relative() / 1000000.0 - is->vidclk.last_updated;
1493         if (is->read_pause_return != AVERROR(ENOSYS)) {
1494             is->vidclk.paused = 0;
1495         }
1496         set_clock(&is->vidclk, get_clock(&is->vidclk), is->vidclk.serial);
1497     }
1498     set_clock(&is->extclk, get_clock(&is->extclk), is->extclk.serial);
1499     is->paused = is->audclk.paused = is->vidclk.paused = is->extclk.paused = !is->paused;
1500 }
1501
1502 static void toggle_pause(VideoState *is)
1503 {
1504     stream_toggle_pause(is);
1505     is->step = 0;
1506 }
1507
1508 static void toggle_mute(VideoState *is)
1509 {
1510     is->muted = !is->muted;
1511 }
1512
1513 static void update_volume(VideoState *is, int sign, double step)
1514 {
1515     double volume_level = is->audio_volume ? (20 * log(is->audio_volume / (double)SDL_MIX_MAXVOLUME) / log(10)) : -1000.0;
1516     int new_volume = lrint(SDL_MIX_MAXVOLUME * pow(10.0, (volume_level + sign * step) / 20.0));
1517     is->audio_volume = av_clip(is->audio_volume == new_volume ? (is->audio_volume + sign) : new_volume, 0, SDL_MIX_MAXVOLUME);
1518 }
1519
1520 static void step_to_next_frame(VideoState *is)
1521 {
1522     /* if the stream is paused unpause it, then step */
1523     if (is->paused)
1524         stream_toggle_pause(is);
1525     is->step = 1;
1526 }
1527
1528 static double compute_target_delay(double delay, VideoState *is)
1529 {
1530     double sync_threshold, diff = 0;
1531
1532     /* update delay to follow master synchronisation source */
1533     if (get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER) {
1534         /* if video is slave, we try to correct big delays by
1535            duplicating or deleting a frame */
1536         diff = get_clock(&is->vidclk) - get_master_clock(is);
1537
1538         /* skip or repeat frame. We take into account the
1539            delay to compute the threshold. I still don't know
1540            if it is the best guess */
1541         sync_threshold = FFMAX(AV_SYNC_THRESHOLD_MIN, FFMIN(AV_SYNC_THRESHOLD_MAX, delay));
1542         if (!isnan(diff) && fabs(diff) < is->max_frame_duration) {
1543             if (diff <= -sync_threshold)
1544                 delay = FFMAX(0, delay + diff);
1545             else if (diff >= sync_threshold && delay > AV_SYNC_FRAMEDUP_THRESHOLD)
1546                 delay = delay + diff;
1547             else if (diff >= sync_threshold)
1548                 delay = 2 * delay;
1549         }
1550     }
1551
1552     av_log(NULL, AV_LOG_TRACE, "video: delay=%0.3f A-V=%f\n",
1553             delay, -diff);
1554
1555     return delay;
1556 }
1557
1558 static double vp_duration(VideoState *is, Frame *vp, Frame *nextvp) {
1559     if (vp->serial == nextvp->serial) {
1560         double duration = nextvp->pts - vp->pts;
1561         if (isnan(duration) || duration <= 0 || duration > is->max_frame_duration)
1562             return vp->duration;
1563         else
1564             return duration;
1565     } else {
1566         return 0.0;
1567     }
1568 }
1569
1570 static void update_video_pts(VideoState *is, double pts, int64_t pos, int serial) {
1571     /* update current video pts */
1572     set_clock(&is->vidclk, pts, serial);
1573     sync_clock_to_slave(&is->extclk, &is->vidclk);
1574 }
1575
1576 /* called to display each frame */
1577 static void video_refresh(void *opaque, double *remaining_time)
1578 {
1579     VideoState *is = opaque;
1580     double time;
1581
1582     Frame *sp, *sp2;
1583
1584     if (!is->paused && get_master_sync_type(is) == AV_SYNC_EXTERNAL_CLOCK && is->realtime)
1585         check_external_clock_speed(is);
1586
1587     if (!display_disable && is->show_mode != SHOW_MODE_VIDEO && is->audio_st) {
1588         time = av_gettime_relative() / 1000000.0;
1589         if (is->force_refresh || is->last_vis_time + rdftspeed < time) {
1590             video_display(is);
1591             is->last_vis_time = time;
1592         }
1593         *remaining_time = FFMIN(*remaining_time, is->last_vis_time + rdftspeed - time);
1594     }
1595
1596     if (is->video_st) {
1597 retry:
1598         if (frame_queue_nb_remaining(&is->pictq) == 0) {
1599             // nothing to do, no picture to display in the queue
1600         } else {
1601             double last_duration, duration, delay;
1602             Frame *vp, *lastvp;
1603
1604             /* dequeue the picture */
1605             lastvp = frame_queue_peek_last(&is->pictq);
1606             vp = frame_queue_peek(&is->pictq);
1607
1608             if (vp->serial != is->videoq.serial) {
1609                 frame_queue_next(&is->pictq);
1610                 goto retry;
1611             }
1612
1613             if (lastvp->serial != vp->serial)
1614                 is->frame_timer = av_gettime_relative() / 1000000.0;
1615
1616             if (is->paused)
1617                 goto display;
1618
1619             /* compute nominal last_duration */
1620             last_duration = vp_duration(is, lastvp, vp);
1621             delay = compute_target_delay(last_duration, is);
1622
1623             time= av_gettime_relative()/1000000.0;
1624             if (time < is->frame_timer + delay) {
1625                 *remaining_time = FFMIN(is->frame_timer + delay - time, *remaining_time);
1626                 goto display;
1627             }
1628
1629             is->frame_timer += delay;
1630             if (delay > 0 && time - is->frame_timer > AV_SYNC_THRESHOLD_MAX)
1631                 is->frame_timer = time;
1632
1633             SDL_LockMutex(is->pictq.mutex);
1634             if (!isnan(vp->pts))
1635                 update_video_pts(is, vp->pts, vp->pos, vp->serial);
1636             SDL_UnlockMutex(is->pictq.mutex);
1637
1638             if (frame_queue_nb_remaining(&is->pictq) > 1) {
1639                 Frame *nextvp = frame_queue_peek_next(&is->pictq);
1640                 duration = vp_duration(is, vp, nextvp);
1641                 if(!is->step && (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) && time > is->frame_timer + duration){
1642                     is->frame_drops_late++;
1643                     frame_queue_next(&is->pictq);
1644                     goto retry;
1645                 }
1646             }
1647
1648             if (is->subtitle_st) {
1649                     while (frame_queue_nb_remaining(&is->subpq) > 0) {
1650                         sp = frame_queue_peek(&is->subpq);
1651
1652                         if (frame_queue_nb_remaining(&is->subpq) > 1)
1653                             sp2 = frame_queue_peek_next(&is->subpq);
1654                         else
1655                             sp2 = NULL;
1656
1657                         if (sp->serial != is->subtitleq.serial
1658                                 || (is->vidclk.pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
1659                                 || (sp2 && is->vidclk.pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
1660                         {
1661                             if (sp->uploaded) {
1662                                 int i;
1663                                 for (i = 0; i < sp->sub.num_rects; i++) {
1664                                     AVSubtitleRect *sub_rect = sp->sub.rects[i];
1665                                     uint8_t *pixels;
1666                                     int pitch, j;
1667
1668                                     if (!SDL_LockTexture(is->sub_texture, (SDL_Rect *)sub_rect, (void **)&pixels, &pitch)) {
1669                                         for (j = 0; j < sub_rect->h; j++, pixels += pitch)
1670                                             memset(pixels, 0, sub_rect->w << 2);
1671                                         SDL_UnlockTexture(is->sub_texture);
1672                                     }
1673                                 }
1674                             }
1675                             frame_queue_next(&is->subpq);
1676                         } else {
1677                             break;
1678                         }
1679                     }
1680             }
1681
1682             frame_queue_next(&is->pictq);
1683             is->force_refresh = 1;
1684
1685             if (is->step && !is->paused)
1686                 stream_toggle_pause(is);
1687         }
1688 display:
1689         /* display picture */
1690         if (!display_disable && is->force_refresh && is->show_mode == SHOW_MODE_VIDEO && is->pictq.rindex_shown)
1691             video_display(is);
1692     }
1693     is->force_refresh = 0;
1694     if (show_status) {
1695         static int64_t last_time;
1696         int64_t cur_time;
1697         int aqsize, vqsize, sqsize;
1698         double av_diff;
1699
1700         cur_time = av_gettime_relative();
1701         if (!last_time || (cur_time - last_time) >= 30000) {
1702             aqsize = 0;
1703             vqsize = 0;
1704             sqsize = 0;
1705             if (is->audio_st)
1706                 aqsize = is->audioq.size;
1707             if (is->video_st)
1708                 vqsize = is->videoq.size;
1709             if (is->subtitle_st)
1710                 sqsize = is->subtitleq.size;
1711             av_diff = 0;
1712             if (is->audio_st && is->video_st)
1713                 av_diff = get_clock(&is->audclk) - get_clock(&is->vidclk);
1714             else if (is->video_st)
1715                 av_diff = get_master_clock(is) - get_clock(&is->vidclk);
1716             else if (is->audio_st)
1717                 av_diff = get_master_clock(is) - get_clock(&is->audclk);
1718             av_log(NULL, AV_LOG_INFO,
1719                    "%7.2f %s:%7.3f fd=%4d aq=%5dKB vq=%5dKB sq=%5dB f=%"PRId64"/%"PRId64"   \r",
1720                    get_master_clock(is),
1721                    (is->audio_st && is->video_st) ? "A-V" : (is->video_st ? "M-V" : (is->audio_st ? "M-A" : "   ")),
1722                    av_diff,
1723                    is->frame_drops_early + is->frame_drops_late,
1724                    aqsize / 1024,
1725                    vqsize / 1024,
1726                    sqsize,
1727                    is->video_st ? is->viddec.avctx->pts_correction_num_faulty_dts : 0,
1728                    is->video_st ? is->viddec.avctx->pts_correction_num_faulty_pts : 0);
1729             fflush(stdout);
1730             last_time = cur_time;
1731         }
1732     }
1733 }
1734
1735 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts, double duration, int64_t pos, int serial)
1736 {
1737     Frame *vp;
1738
1739 #if defined(DEBUG_SYNC)
1740     printf("frame_type=%c pts=%0.3f\n",
1741            av_get_picture_type_char(src_frame->pict_type), pts);
1742 #endif
1743
1744     if (!(vp = frame_queue_peek_writable(&is->pictq)))
1745         return -1;
1746
1747     vp->sar = src_frame->sample_aspect_ratio;
1748     vp->uploaded = 0;
1749
1750     vp->width = src_frame->width;
1751     vp->height = src_frame->height;
1752     vp->format = src_frame->format;
1753
1754     vp->pts = pts;
1755     vp->duration = duration;
1756     vp->pos = pos;
1757     vp->serial = serial;
1758
1759     set_default_window_size(vp->width, vp->height, vp->sar);
1760
1761     av_frame_move_ref(vp->frame, src_frame);
1762     frame_queue_push(&is->pictq);
1763     return 0;
1764 }
1765
1766 static int get_video_frame(VideoState *is, AVFrame *frame)
1767 {
1768     int got_picture;
1769
1770     if ((got_picture = decoder_decode_frame(&is->viddec, frame, NULL)) < 0)
1771         return -1;
1772
1773     if (got_picture) {
1774         double dpts = NAN;
1775
1776         if (frame->pts != AV_NOPTS_VALUE)
1777             dpts = av_q2d(is->video_st->time_base) * frame->pts;
1778
1779         frame->sample_aspect_ratio = av_guess_sample_aspect_ratio(is->ic, is->video_st, frame);
1780
1781         if (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) {
1782             if (frame->pts != AV_NOPTS_VALUE) {
1783                 double diff = dpts - get_master_clock(is);
1784                 if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD &&
1785                     diff - is->frame_last_filter_delay < 0 &&
1786                     is->viddec.pkt_serial == is->vidclk.serial &&
1787                     is->videoq.nb_packets) {
1788                     is->frame_drops_early++;
1789                     av_frame_unref(frame);
1790                     got_picture = 0;
1791                 }
1792             }
1793         }
1794     }
1795
1796     return got_picture;
1797 }
1798
1799 #if CONFIG_AVFILTER
1800 static int configure_filtergraph(AVFilterGraph *graph, const char *filtergraph,
1801                                  AVFilterContext *source_ctx, AVFilterContext *sink_ctx)
1802 {
1803     int ret, i;
1804     int nb_filters = graph->nb_filters;
1805     AVFilterInOut *outputs = NULL, *inputs = NULL;
1806
1807     if (filtergraph) {
1808         outputs = avfilter_inout_alloc();
1809         inputs  = avfilter_inout_alloc();
1810         if (!outputs || !inputs) {
1811             ret = AVERROR(ENOMEM);
1812             goto fail;
1813         }
1814
1815         outputs->name       = av_strdup("in");
1816         outputs->filter_ctx = source_ctx;
1817         outputs->pad_idx    = 0;
1818         outputs->next       = NULL;
1819
1820         inputs->name        = av_strdup("out");
1821         inputs->filter_ctx  = sink_ctx;
1822         inputs->pad_idx     = 0;
1823         inputs->next        = NULL;
1824
1825         if ((ret = avfilter_graph_parse_ptr(graph, filtergraph, &inputs, &outputs, NULL)) < 0)
1826             goto fail;
1827     } else {
1828         if ((ret = avfilter_link(source_ctx, 0, sink_ctx, 0)) < 0)
1829             goto fail;
1830     }
1831
1832     /* Reorder the filters to ensure that inputs of the custom filters are merged first */
1833     for (i = 0; i < graph->nb_filters - nb_filters; i++)
1834         FFSWAP(AVFilterContext*, graph->filters[i], graph->filters[i + nb_filters]);
1835
1836     ret = avfilter_graph_config(graph, NULL);
1837 fail:
1838     avfilter_inout_free(&outputs);
1839     avfilter_inout_free(&inputs);
1840     return ret;
1841 }
1842
1843 static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const char *vfilters, AVFrame *frame)
1844 {
1845     enum AVPixelFormat pix_fmts[FF_ARRAY_ELEMS(sdl_texture_format_map)];
1846     char sws_flags_str[512] = "";
1847     char buffersrc_args[256];
1848     int ret;
1849     AVFilterContext *filt_src = NULL, *filt_out = NULL, *last_filter = NULL;
1850     AVCodecParameters *codecpar = is->video_st->codecpar;
1851     AVRational fr = av_guess_frame_rate(is->ic, is->video_st, NULL);
1852     AVDictionaryEntry *e = NULL;
1853     int i;
1854
1855     for (i = 0; i < FF_ARRAY_ELEMS(pix_fmts); i++)
1856         pix_fmts[i] = sdl_texture_format_map[i].format;
1857
1858     while ((e = av_dict_get(sws_dict, "", e, AV_DICT_IGNORE_SUFFIX))) {
1859         if (!strcmp(e->key, "sws_flags")) {
1860             av_strlcatf(sws_flags_str, sizeof(sws_flags_str), "%s=%s:", "flags", e->value);
1861         } else
1862             av_strlcatf(sws_flags_str, sizeof(sws_flags_str), "%s=%s:", e->key, e->value);
1863     }
1864     if (strlen(sws_flags_str))
1865         sws_flags_str[strlen(sws_flags_str)-1] = '\0';
1866
1867     graph->scale_sws_opts = av_strdup(sws_flags_str);
1868
1869     snprintf(buffersrc_args, sizeof(buffersrc_args),
1870              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
1871              frame->width, frame->height, frame->format,
1872              is->video_st->time_base.num, is->video_st->time_base.den,
1873              codecpar->sample_aspect_ratio.num, FFMAX(codecpar->sample_aspect_ratio.den, 1));
1874     if (fr.num && fr.den)
1875         av_strlcatf(buffersrc_args, sizeof(buffersrc_args), ":frame_rate=%d/%d", fr.num, fr.den);
1876
1877     if ((ret = avfilter_graph_create_filter(&filt_src,
1878                                             avfilter_get_by_name("buffer"),
1879                                             "ffplay_buffer", buffersrc_args, NULL,
1880                                             graph)) < 0)
1881         goto fail;
1882
1883     ret = avfilter_graph_create_filter(&filt_out,
1884                                        avfilter_get_by_name("buffersink"),
1885                                        "ffplay_buffersink", NULL, NULL, graph);
1886     if (ret < 0)
1887         goto fail;
1888
1889     if ((ret = av_opt_set_int_list(filt_out, "pix_fmts", pix_fmts,  AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1890         goto fail;
1891
1892     last_filter = filt_out;
1893
1894 /* Note: this macro adds a filter before the lastly added filter, so the
1895  * processing order of the filters is in reverse */
1896 #define INSERT_FILT(name, arg) do {                                          \
1897     AVFilterContext *filt_ctx;                                               \
1898                                                                              \
1899     ret = avfilter_graph_create_filter(&filt_ctx,                            \
1900                                        avfilter_get_by_name(name),           \
1901                                        "ffplay_" name, arg, NULL, graph);    \
1902     if (ret < 0)                                                             \
1903         goto fail;                                                           \
1904                                                                              \
1905     ret = avfilter_link(filt_ctx, 0, last_filter, 0);                        \
1906     if (ret < 0)                                                             \
1907         goto fail;                                                           \
1908                                                                              \
1909     last_filter = filt_ctx;                                                  \
1910 } while (0)
1911
1912     if (autorotate) {
1913         double theta  = get_rotation(is->video_st);
1914
1915         if (fabs(theta - 90) < 1.0) {
1916             INSERT_FILT("transpose", "clock");
1917         } else if (fabs(theta - 180) < 1.0) {
1918             INSERT_FILT("hflip", NULL);
1919             INSERT_FILT("vflip", NULL);
1920         } else if (fabs(theta - 270) < 1.0) {
1921             INSERT_FILT("transpose", "cclock");
1922         } else if (fabs(theta) > 1.0) {
1923             char rotate_buf[64];
1924             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
1925             INSERT_FILT("rotate", rotate_buf);
1926         }
1927     }
1928
1929     if ((ret = configure_filtergraph(graph, vfilters, filt_src, last_filter)) < 0)
1930         goto fail;
1931
1932     is->in_video_filter  = filt_src;
1933     is->out_video_filter = filt_out;
1934
1935 fail:
1936     return ret;
1937 }
1938
1939 static int configure_audio_filters(VideoState *is, const char *afilters, int force_output_format)
1940 {
1941     static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
1942     int sample_rates[2] = { 0, -1 };
1943     int64_t channel_layouts[2] = { 0, -1 };
1944     int channels[2] = { 0, -1 };
1945     AVFilterContext *filt_asrc = NULL, *filt_asink = NULL;
1946     char aresample_swr_opts[512] = "";
1947     AVDictionaryEntry *e = NULL;
1948     char asrc_args[256];
1949     int ret;
1950
1951     avfilter_graph_free(&is->agraph);
1952     if (!(is->agraph = avfilter_graph_alloc()))
1953         return AVERROR(ENOMEM);
1954
1955     while ((e = av_dict_get(swr_opts, "", e, AV_DICT_IGNORE_SUFFIX)))
1956         av_strlcatf(aresample_swr_opts, sizeof(aresample_swr_opts), "%s=%s:", e->key, e->value);
1957     if (strlen(aresample_swr_opts))
1958         aresample_swr_opts[strlen(aresample_swr_opts)-1] = '\0';
1959     av_opt_set(is->agraph, "aresample_swr_opts", aresample_swr_opts, 0);
1960
1961     ret = snprintf(asrc_args, sizeof(asrc_args),
1962                    "sample_rate=%d:sample_fmt=%s:channels=%d:time_base=%d/%d",
1963                    is->audio_filter_src.freq, av_get_sample_fmt_name(is->audio_filter_src.fmt),
1964                    is->audio_filter_src.channels,
1965                    1, is->audio_filter_src.freq);
1966     if (is->audio_filter_src.channel_layout)
1967         snprintf(asrc_args + ret, sizeof(asrc_args) - ret,
1968                  ":channel_layout=0x%"PRIx64,  is->audio_filter_src.channel_layout);
1969
1970     ret = avfilter_graph_create_filter(&filt_asrc,
1971                                        avfilter_get_by_name("abuffer"), "ffplay_abuffer",
1972                                        asrc_args, NULL, is->agraph);
1973     if (ret < 0)
1974         goto end;
1975
1976
1977     ret = avfilter_graph_create_filter(&filt_asink,
1978                                        avfilter_get_by_name("abuffersink"), "ffplay_abuffersink",
1979                                        NULL, NULL, is->agraph);
1980     if (ret < 0)
1981         goto end;
1982
1983     if ((ret = av_opt_set_int_list(filt_asink, "sample_fmts", sample_fmts,  AV_SAMPLE_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1984         goto end;
1985     if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
1986         goto end;
1987
1988     if (force_output_format) {
1989         channel_layouts[0] = is->audio_tgt.channel_layout;
1990         channels       [0] = is->audio_tgt.channels;
1991         sample_rates   [0] = is->audio_tgt.freq;
1992         if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 0, AV_OPT_SEARCH_CHILDREN)) < 0)
1993             goto end;
1994         if ((ret = av_opt_set_int_list(filt_asink, "channel_layouts", channel_layouts,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1995             goto end;
1996         if ((ret = av_opt_set_int_list(filt_asink, "channel_counts" , channels       ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1997             goto end;
1998         if ((ret = av_opt_set_int_list(filt_asink, "sample_rates"   , sample_rates   ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1999             goto end;
2000     }
2001
2002
2003     if ((ret = configure_filtergraph(is->agraph, afilters, filt_asrc, filt_asink)) < 0)
2004         goto end;
2005
2006     is->in_audio_filter  = filt_asrc;
2007     is->out_audio_filter = filt_asink;
2008
2009 end:
2010     if (ret < 0)
2011         avfilter_graph_free(&is->agraph);
2012     return ret;
2013 }
2014 #endif  /* CONFIG_AVFILTER */
2015
2016 static int audio_thread(void *arg)
2017 {
2018     VideoState *is = arg;
2019     AVFrame *frame = av_frame_alloc();
2020     Frame *af;
2021 #if CONFIG_AVFILTER
2022     int last_serial = -1;
2023     int64_t dec_channel_layout;
2024     int reconfigure;
2025 #endif
2026     int got_frame = 0;
2027     AVRational tb;
2028     int ret = 0;
2029
2030     if (!frame)
2031         return AVERROR(ENOMEM);
2032
2033     do {
2034         if ((got_frame = decoder_decode_frame(&is->auddec, frame, NULL)) < 0)
2035             goto the_end;
2036
2037         if (got_frame) {
2038                 tb = (AVRational){1, frame->sample_rate};
2039
2040 #if CONFIG_AVFILTER
2041                 dec_channel_layout = get_valid_channel_layout(frame->channel_layout, frame->channels);
2042
2043                 reconfigure =
2044                     cmp_audio_fmts(is->audio_filter_src.fmt, is->audio_filter_src.channels,
2045                                    frame->format, frame->channels)    ||
2046                     is->audio_filter_src.channel_layout != dec_channel_layout ||
2047                     is->audio_filter_src.freq           != frame->sample_rate ||
2048                     is->auddec.pkt_serial               != last_serial;
2049
2050                 if (reconfigure) {
2051                     char buf1[1024], buf2[1024];
2052                     av_get_channel_layout_string(buf1, sizeof(buf1), -1, is->audio_filter_src.channel_layout);
2053                     av_get_channel_layout_string(buf2, sizeof(buf2), -1, dec_channel_layout);
2054                     av_log(NULL, AV_LOG_DEBUG,
2055                            "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",
2056                            is->audio_filter_src.freq, is->audio_filter_src.channels, av_get_sample_fmt_name(is->audio_filter_src.fmt), buf1, last_serial,
2057                            frame->sample_rate, frame->channels, av_get_sample_fmt_name(frame->format), buf2, is->auddec.pkt_serial);
2058
2059                     is->audio_filter_src.fmt            = frame->format;
2060                     is->audio_filter_src.channels       = frame->channels;
2061                     is->audio_filter_src.channel_layout = dec_channel_layout;
2062                     is->audio_filter_src.freq           = frame->sample_rate;
2063                     last_serial                         = is->auddec.pkt_serial;
2064
2065                     if ((ret = configure_audio_filters(is, afilters, 1)) < 0)
2066                         goto the_end;
2067                 }
2068
2069             if ((ret = av_buffersrc_add_frame(is->in_audio_filter, frame)) < 0)
2070                 goto the_end;
2071
2072             while ((ret = av_buffersink_get_frame_flags(is->out_audio_filter, frame, 0)) >= 0) {
2073                 tb = av_buffersink_get_time_base(is->out_audio_filter);
2074 #endif
2075                 if (!(af = frame_queue_peek_writable(&is->sampq)))
2076                     goto the_end;
2077
2078                 af->pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
2079                 af->pos = frame->pkt_pos;
2080                 af->serial = is->auddec.pkt_serial;
2081                 af->duration = av_q2d((AVRational){frame->nb_samples, frame->sample_rate});
2082
2083                 av_frame_move_ref(af->frame, frame);
2084                 frame_queue_push(&is->sampq);
2085
2086 #if CONFIG_AVFILTER
2087                 if (is->audioq.serial != is->auddec.pkt_serial)
2088                     break;
2089             }
2090             if (ret == AVERROR_EOF)
2091                 is->auddec.finished = is->auddec.pkt_serial;
2092 #endif
2093         }
2094     } while (ret >= 0 || ret == AVERROR(EAGAIN) || ret == AVERROR_EOF);
2095  the_end:
2096 #if CONFIG_AVFILTER
2097     avfilter_graph_free(&is->agraph);
2098 #endif
2099     av_frame_free(&frame);
2100     return ret;
2101 }
2102
2103 static int decoder_start(Decoder *d, int (*fn)(void *), void *arg)
2104 {
2105     packet_queue_start(d->queue);
2106     d->decoder_tid = SDL_CreateThread(fn, "decoder", arg);
2107     if (!d->decoder_tid) {
2108         av_log(NULL, AV_LOG_ERROR, "SDL_CreateThread(): %s\n", SDL_GetError());
2109         return AVERROR(ENOMEM);
2110     }
2111     return 0;
2112 }
2113
2114 static int video_thread(void *arg)
2115 {
2116     VideoState *is = arg;
2117     AVFrame *frame = av_frame_alloc();
2118     double pts;
2119     double duration;
2120     int ret;
2121     AVRational tb = is->video_st->time_base;
2122     AVRational frame_rate = av_guess_frame_rate(is->ic, is->video_st, NULL);
2123
2124 #if CONFIG_AVFILTER
2125     AVFilterGraph *graph = avfilter_graph_alloc();
2126     AVFilterContext *filt_out = NULL, *filt_in = NULL;
2127     int last_w = 0;
2128     int last_h = 0;
2129     enum AVPixelFormat last_format = -2;
2130     int last_serial = -1;
2131     int last_vfilter_idx = 0;
2132     if (!graph) {
2133         av_frame_free(&frame);
2134         return AVERROR(ENOMEM);
2135     }
2136
2137 #endif
2138
2139     if (!frame) {
2140 #if CONFIG_AVFILTER
2141         avfilter_graph_free(&graph);
2142 #endif
2143         return AVERROR(ENOMEM);
2144     }
2145
2146     for (;;) {
2147         ret = get_video_frame(is, frame);
2148         if (ret < 0)
2149             goto the_end;
2150         if (!ret)
2151             continue;
2152
2153 #if CONFIG_AVFILTER
2154         if (   last_w != frame->width
2155             || last_h != frame->height
2156             || last_format != frame->format
2157             || last_serial != is->viddec.pkt_serial
2158             || last_vfilter_idx != is->vfilter_idx) {
2159             av_log(NULL, AV_LOG_DEBUG,
2160                    "Video frame changed from size:%dx%d format:%s serial:%d to size:%dx%d format:%s serial:%d\n",
2161                    last_w, last_h,
2162                    (const char *)av_x_if_null(av_get_pix_fmt_name(last_format), "none"), last_serial,
2163                    frame->width, frame->height,
2164                    (const char *)av_x_if_null(av_get_pix_fmt_name(frame->format), "none"), is->viddec.pkt_serial);
2165             avfilter_graph_free(&graph);
2166             graph = avfilter_graph_alloc();
2167             if ((ret = configure_video_filters(graph, is, vfilters_list ? vfilters_list[is->vfilter_idx] : NULL, frame)) < 0) {
2168                 SDL_Event event;
2169                 event.type = FF_QUIT_EVENT;
2170                 event.user.data1 = is;
2171                 SDL_PushEvent(&event);
2172                 goto the_end;
2173             }
2174             filt_in  = is->in_video_filter;
2175             filt_out = is->out_video_filter;
2176             last_w = frame->width;
2177             last_h = frame->height;
2178             last_format = frame->format;
2179             last_serial = is->viddec.pkt_serial;
2180             last_vfilter_idx = is->vfilter_idx;
2181             frame_rate = av_buffersink_get_frame_rate(filt_out);
2182         }
2183
2184         ret = av_buffersrc_add_frame(filt_in, frame);
2185         if (ret < 0)
2186             goto the_end;
2187
2188         while (ret >= 0) {
2189             is->frame_last_returned_time = av_gettime_relative() / 1000000.0;
2190
2191             ret = av_buffersink_get_frame_flags(filt_out, frame, 0);
2192             if (ret < 0) {
2193                 if (ret == AVERROR_EOF)
2194                     is->viddec.finished = is->viddec.pkt_serial;
2195                 ret = 0;
2196                 break;
2197             }
2198
2199             is->frame_last_filter_delay = av_gettime_relative() / 1000000.0 - is->frame_last_returned_time;
2200             if (fabs(is->frame_last_filter_delay) > AV_NOSYNC_THRESHOLD / 10.0)
2201                 is->frame_last_filter_delay = 0;
2202             tb = av_buffersink_get_time_base(filt_out);
2203 #endif
2204             duration = (frame_rate.num && frame_rate.den ? av_q2d((AVRational){frame_rate.den, frame_rate.num}) : 0);
2205             pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
2206             ret = queue_picture(is, frame, pts, duration, frame->pkt_pos, is->viddec.pkt_serial);
2207             av_frame_unref(frame);
2208 #if CONFIG_AVFILTER
2209         }
2210 #endif
2211
2212         if (ret < 0)
2213             goto the_end;
2214     }
2215  the_end:
2216 #if CONFIG_AVFILTER
2217     avfilter_graph_free(&graph);
2218 #endif
2219     av_frame_free(&frame);
2220     return 0;
2221 }
2222
2223 static int subtitle_thread(void *arg)
2224 {
2225     VideoState *is = arg;
2226     Frame *sp;
2227     int got_subtitle;
2228     double pts;
2229
2230     for (;;) {
2231         if (!(sp = frame_queue_peek_writable(&is->subpq)))
2232             return 0;
2233
2234         if ((got_subtitle = decoder_decode_frame(&is->subdec, NULL, &sp->sub)) < 0)
2235             break;
2236
2237         pts = 0;
2238
2239         if (got_subtitle && sp->sub.format == 0) {
2240             if (sp->sub.pts != AV_NOPTS_VALUE)
2241                 pts = sp->sub.pts / (double)AV_TIME_BASE;
2242             sp->pts = pts;
2243             sp->serial = is->subdec.pkt_serial;
2244             sp->width = is->subdec.avctx->width;
2245             sp->height = is->subdec.avctx->height;
2246             sp->uploaded = 0;
2247
2248             /* now we can update the picture count */
2249             frame_queue_push(&is->subpq);
2250         } else if (got_subtitle) {
2251             avsubtitle_free(&sp->sub);
2252         }
2253     }
2254     return 0;
2255 }
2256
2257 /* copy samples for viewing in editor window */
2258 static void update_sample_display(VideoState *is, short *samples, int samples_size)
2259 {
2260     int size, len;
2261
2262     size = samples_size / sizeof(short);
2263     while (size > 0) {
2264         len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
2265         if (len > size)
2266             len = size;
2267         memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
2268         samples += len;
2269         is->sample_array_index += len;
2270         if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
2271             is->sample_array_index = 0;
2272         size -= len;
2273     }
2274 }
2275
2276 /* return the wanted number of samples to get better sync if sync_type is video
2277  * or external master clock */
2278 static int synchronize_audio(VideoState *is, int nb_samples)
2279 {
2280     int wanted_nb_samples = nb_samples;
2281
2282     /* if not master, then we try to remove or add samples to correct the clock */
2283     if (get_master_sync_type(is) != AV_SYNC_AUDIO_MASTER) {
2284         double diff, avg_diff;
2285         int min_nb_samples, max_nb_samples;
2286
2287         diff = get_clock(&is->audclk) - get_master_clock(is);
2288
2289         if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD) {
2290             is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
2291             if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
2292                 /* not enough measures to have a correct estimate */
2293                 is->audio_diff_avg_count++;
2294             } else {
2295                 /* estimate the A-V difference */
2296                 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
2297
2298                 if (fabs(avg_diff) >= is->audio_diff_threshold) {
2299                     wanted_nb_samples = nb_samples + (int)(diff * is->audio_src.freq);
2300                     min_nb_samples = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2301                     max_nb_samples = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2302                     wanted_nb_samples = av_clip(wanted_nb_samples, min_nb_samples, max_nb_samples);
2303                 }
2304                 av_log(NULL, AV_LOG_TRACE, "diff=%f adiff=%f sample_diff=%d apts=%0.3f %f\n",
2305                         diff, avg_diff, wanted_nb_samples - nb_samples,
2306                         is->audio_clock, is->audio_diff_threshold);
2307             }
2308         } else {
2309             /* too big difference : may be initial PTS errors, so
2310                reset A-V filter */
2311             is->audio_diff_avg_count = 0;
2312             is->audio_diff_cum       = 0;
2313         }
2314     }
2315
2316     return wanted_nb_samples;
2317 }
2318
2319 /**
2320  * Decode one audio frame and return its uncompressed size.
2321  *
2322  * The processed audio frame is decoded, converted if required, and
2323  * stored in is->audio_buf, with size in bytes given by the return
2324  * value.
2325  */
2326 static int audio_decode_frame(VideoState *is)
2327 {
2328     int data_size, resampled_data_size;
2329     int64_t dec_channel_layout;
2330     av_unused double audio_clock0;
2331     int wanted_nb_samples;
2332     Frame *af;
2333
2334     if (is->paused)
2335         return -1;
2336
2337     do {
2338 #if defined(_WIN32)
2339         while (frame_queue_nb_remaining(&is->sampq) == 0) {
2340             if ((av_gettime_relative() - audio_callback_time) > 1000000LL * is->audio_hw_buf_size / is->audio_tgt.bytes_per_sec / 2)
2341                 return -1;
2342             av_usleep (1000);
2343         }
2344 #endif
2345         if (!(af = frame_queue_peek_readable(&is->sampq)))
2346             return -1;
2347         frame_queue_next(&is->sampq);
2348     } while (af->serial != is->audioq.serial);
2349
2350     data_size = av_samples_get_buffer_size(NULL, af->frame->channels,
2351                                            af->frame->nb_samples,
2352                                            af->frame->format, 1);
2353
2354     dec_channel_layout =
2355         (af->frame->channel_layout && af->frame->channels == av_get_channel_layout_nb_channels(af->frame->channel_layout)) ?
2356         af->frame->channel_layout : av_get_default_channel_layout(af->frame->channels);
2357     wanted_nb_samples = synchronize_audio(is, af->frame->nb_samples);
2358
2359     if (af->frame->format        != is->audio_src.fmt            ||
2360         dec_channel_layout       != is->audio_src.channel_layout ||
2361         af->frame->sample_rate   != is->audio_src.freq           ||
2362         (wanted_nb_samples       != af->frame->nb_samples && !is->swr_ctx)) {
2363         swr_free(&is->swr_ctx);
2364         is->swr_ctx = swr_alloc_set_opts(NULL,
2365                                          is->audio_tgt.channel_layout, is->audio_tgt.fmt, is->audio_tgt.freq,
2366                                          dec_channel_layout,           af->frame->format, af->frame->sample_rate,
2367                                          0, NULL);
2368         if (!is->swr_ctx || swr_init(is->swr_ctx) < 0) {
2369             av_log(NULL, AV_LOG_ERROR,
2370                    "Cannot create sample rate converter for conversion of %d Hz %s %d channels to %d Hz %s %d channels!\n",
2371                     af->frame->sample_rate, av_get_sample_fmt_name(af->frame->format), af->frame->channels,
2372                     is->audio_tgt.freq, av_get_sample_fmt_name(is->audio_tgt.fmt), is->audio_tgt.channels);
2373             swr_free(&is->swr_ctx);
2374             return -1;
2375         }
2376         is->audio_src.channel_layout = dec_channel_layout;
2377         is->audio_src.channels       = af->frame->channels;
2378         is->audio_src.freq = af->frame->sample_rate;
2379         is->audio_src.fmt = af->frame->format;
2380     }
2381
2382     if (is->swr_ctx) {
2383         const uint8_t **in = (const uint8_t **)af->frame->extended_data;
2384         uint8_t **out = &is->audio_buf1;
2385         int out_count = (int64_t)wanted_nb_samples * is->audio_tgt.freq / af->frame->sample_rate + 256;
2386         int out_size  = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, out_count, is->audio_tgt.fmt, 0);
2387         int len2;
2388         if (out_size < 0) {
2389             av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size() failed\n");
2390             return -1;
2391         }
2392         if (wanted_nb_samples != af->frame->nb_samples) {
2393             if (swr_set_compensation(is->swr_ctx, (wanted_nb_samples - af->frame->nb_samples) * is->audio_tgt.freq / af->frame->sample_rate,
2394                                         wanted_nb_samples * is->audio_tgt.freq / af->frame->sample_rate) < 0) {
2395                 av_log(NULL, AV_LOG_ERROR, "swr_set_compensation() failed\n");
2396                 return -1;
2397             }
2398         }
2399         av_fast_malloc(&is->audio_buf1, &is->audio_buf1_size, out_size);
2400         if (!is->audio_buf1)
2401             return AVERROR(ENOMEM);
2402         len2 = swr_convert(is->swr_ctx, out, out_count, in, af->frame->nb_samples);
2403         if (len2 < 0) {
2404             av_log(NULL, AV_LOG_ERROR, "swr_convert() failed\n");
2405             return -1;
2406         }
2407         if (len2 == out_count) {
2408             av_log(NULL, AV_LOG_WARNING, "audio buffer is probably too small\n");
2409             if (swr_init(is->swr_ctx) < 0)
2410                 swr_free(&is->swr_ctx);
2411         }
2412         is->audio_buf = is->audio_buf1;
2413         resampled_data_size = len2 * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2414     } else {
2415         is->audio_buf = af->frame->data[0];
2416         resampled_data_size = data_size;
2417     }
2418
2419     audio_clock0 = is->audio_clock;
2420     /* update the audio clock with the pts */
2421     if (!isnan(af->pts))
2422         is->audio_clock = af->pts + (double) af->frame->nb_samples / af->frame->sample_rate;
2423     else
2424         is->audio_clock = NAN;
2425     is->audio_clock_serial = af->serial;
2426 #ifdef DEBUG
2427     {
2428         static double last_clock;
2429         printf("audio: delay=%0.3f clock=%0.3f clock0=%0.3f\n",
2430                is->audio_clock - last_clock,
2431                is->audio_clock, audio_clock0);
2432         last_clock = is->audio_clock;
2433     }
2434 #endif
2435     return resampled_data_size;
2436 }
2437
2438 /* prepare a new audio buffer */
2439 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
2440 {
2441     VideoState *is = opaque;
2442     int audio_size, len1;
2443
2444     audio_callback_time = av_gettime_relative();
2445
2446     while (len > 0) {
2447         if (is->audio_buf_index >= is->audio_buf_size) {
2448            audio_size = audio_decode_frame(is);
2449            if (audio_size < 0) {
2450                 /* if error, just output silence */
2451                is->audio_buf = NULL;
2452                is->audio_buf_size = SDL_AUDIO_MIN_BUFFER_SIZE / is->audio_tgt.frame_size * is->audio_tgt.frame_size;
2453            } else {
2454                if (is->show_mode != SHOW_MODE_VIDEO)
2455                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2456                is->audio_buf_size = audio_size;
2457            }
2458            is->audio_buf_index = 0;
2459         }
2460         len1 = is->audio_buf_size - is->audio_buf_index;
2461         if (len1 > len)
2462             len1 = len;
2463         if (!is->muted && is->audio_buf && is->audio_volume == SDL_MIX_MAXVOLUME)
2464             memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2465         else {
2466             memset(stream, 0, len1);
2467             if (!is->muted && is->audio_buf)
2468                 SDL_MixAudio(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1, is->audio_volume);
2469         }
2470         len -= len1;
2471         stream += len1;
2472         is->audio_buf_index += len1;
2473     }
2474     is->audio_write_buf_size = is->audio_buf_size - is->audio_buf_index;
2475     /* Let's assume the audio driver that is used by SDL has two periods. */
2476     if (!isnan(is->audio_clock)) {
2477         set_clock_at(&is->audclk, is->audio_clock - (double)(2 * is->audio_hw_buf_size + is->audio_write_buf_size) / is->audio_tgt.bytes_per_sec, is->audio_clock_serial, audio_callback_time / 1000000.0);
2478         sync_clock_to_slave(&is->extclk, &is->audclk);
2479     }
2480 }
2481
2482 static int audio_open(void *opaque, int64_t wanted_channel_layout, int wanted_nb_channels, int wanted_sample_rate, struct AudioParams *audio_hw_params)
2483 {
2484     SDL_AudioSpec wanted_spec, spec;
2485     const char *env;
2486     static const int next_nb_channels[] = {0, 0, 1, 6, 2, 6, 4, 6};
2487     static const int next_sample_rates[] = {0, 44100, 48000, 96000, 192000};
2488     int next_sample_rate_idx = FF_ARRAY_ELEMS(next_sample_rates) - 1;
2489
2490     env = SDL_getenv("SDL_AUDIO_CHANNELS");
2491     if (env) {
2492         wanted_nb_channels = atoi(env);
2493         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2494     }
2495     if (!wanted_channel_layout || wanted_nb_channels != av_get_channel_layout_nb_channels(wanted_channel_layout)) {
2496         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2497         wanted_channel_layout &= ~AV_CH_LAYOUT_STEREO_DOWNMIX;
2498     }
2499     wanted_nb_channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
2500     wanted_spec.channels = wanted_nb_channels;
2501     wanted_spec.freq = wanted_sample_rate;
2502     if (wanted_spec.freq <= 0 || wanted_spec.channels <= 0) {
2503         av_log(NULL, AV_LOG_ERROR, "Invalid sample rate or channel count!\n");
2504         return -1;
2505     }
2506     while (next_sample_rate_idx && next_sample_rates[next_sample_rate_idx] >= wanted_spec.freq)
2507         next_sample_rate_idx--;
2508     wanted_spec.format = AUDIO_S16SYS;
2509     wanted_spec.silence = 0;
2510     wanted_spec.samples = FFMAX(SDL_AUDIO_MIN_BUFFER_SIZE, 2 << av_log2(wanted_spec.freq / SDL_AUDIO_MAX_CALLBACKS_PER_SEC));
2511     wanted_spec.callback = sdl_audio_callback;
2512     wanted_spec.userdata = opaque;
2513     while (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
2514         av_log(NULL, AV_LOG_WARNING, "SDL_OpenAudio (%d channels, %d Hz): %s\n",
2515                wanted_spec.channels, wanted_spec.freq, SDL_GetError());
2516         wanted_spec.channels = next_nb_channels[FFMIN(7, wanted_spec.channels)];
2517         if (!wanted_spec.channels) {
2518             wanted_spec.freq = next_sample_rates[next_sample_rate_idx--];
2519             wanted_spec.channels = wanted_nb_channels;
2520             if (!wanted_spec.freq) {
2521                 av_log(NULL, AV_LOG_ERROR,
2522                        "No more combinations to try, audio open failed\n");
2523                 return -1;
2524             }
2525         }
2526         wanted_channel_layout = av_get_default_channel_layout(wanted_spec.channels);
2527     }
2528     if (spec.format != AUDIO_S16SYS) {
2529         av_log(NULL, AV_LOG_ERROR,
2530                "SDL advised audio format %d is not supported!\n", spec.format);
2531         return -1;
2532     }
2533     if (spec.channels != wanted_spec.channels) {
2534         wanted_channel_layout = av_get_default_channel_layout(spec.channels);
2535         if (!wanted_channel_layout) {
2536             av_log(NULL, AV_LOG_ERROR,
2537                    "SDL advised channel count %d is not supported!\n", spec.channels);
2538             return -1;
2539         }
2540     }
2541
2542     audio_hw_params->fmt = AV_SAMPLE_FMT_S16;
2543     audio_hw_params->freq = spec.freq;
2544     audio_hw_params->channel_layout = wanted_channel_layout;
2545     audio_hw_params->channels =  spec.channels;
2546     audio_hw_params->frame_size = av_samples_get_buffer_size(NULL, audio_hw_params->channels, 1, audio_hw_params->fmt, 1);
2547     audio_hw_params->bytes_per_sec = av_samples_get_buffer_size(NULL, audio_hw_params->channels, audio_hw_params->freq, audio_hw_params->fmt, 1);
2548     if (audio_hw_params->bytes_per_sec <= 0 || audio_hw_params->frame_size <= 0) {
2549         av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size failed\n");
2550         return -1;
2551     }
2552     return spec.size;
2553 }
2554
2555 /* open a given stream. Return 0 if OK */
2556 static int stream_component_open(VideoState *is, int stream_index)
2557 {
2558     AVFormatContext *ic = is->ic;
2559     AVCodecContext *avctx;
2560     AVCodec *codec;
2561     const char *forced_codec_name = NULL;
2562     AVDictionary *opts = NULL;
2563     AVDictionaryEntry *t = NULL;
2564     int sample_rate, nb_channels;
2565     int64_t channel_layout;
2566     int ret = 0;
2567     int stream_lowres = lowres;
2568
2569     if (stream_index < 0 || stream_index >= ic->nb_streams)
2570         return -1;
2571
2572     avctx = avcodec_alloc_context3(NULL);
2573     if (!avctx)
2574         return AVERROR(ENOMEM);
2575
2576     ret = avcodec_parameters_to_context(avctx, ic->streams[stream_index]->codecpar);
2577     if (ret < 0)
2578         goto fail;
2579     av_codec_set_pkt_timebase(avctx, ic->streams[stream_index]->time_base);
2580
2581     codec = avcodec_find_decoder(avctx->codec_id);
2582
2583     switch(avctx->codec_type){
2584         case AVMEDIA_TYPE_AUDIO   : is->last_audio_stream    = stream_index; forced_codec_name =    audio_codec_name; break;
2585         case AVMEDIA_TYPE_SUBTITLE: is->last_subtitle_stream = stream_index; forced_codec_name = subtitle_codec_name; break;
2586         case AVMEDIA_TYPE_VIDEO   : is->last_video_stream    = stream_index; forced_codec_name =    video_codec_name; break;
2587     }
2588     if (forced_codec_name)
2589         codec = avcodec_find_decoder_by_name(forced_codec_name);
2590     if (!codec) {
2591         if (forced_codec_name) av_log(NULL, AV_LOG_WARNING,
2592                                       "No codec could be found with name '%s'\n", forced_codec_name);
2593         else                   av_log(NULL, AV_LOG_WARNING,
2594                                       "No codec could be found with id %d\n", avctx->codec_id);
2595         ret = AVERROR(EINVAL);
2596         goto fail;
2597     }
2598
2599     avctx->codec_id = codec->id;
2600     if(stream_lowres > av_codec_get_max_lowres(codec)){
2601         av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
2602                 av_codec_get_max_lowres(codec));
2603         stream_lowres = av_codec_get_max_lowres(codec);
2604     }
2605     av_codec_set_lowres(avctx, stream_lowres);
2606
2607     if (fast)
2608         avctx->flags2 |= AV_CODEC_FLAG2_FAST;
2609
2610     opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], codec);
2611     if (!av_dict_get(opts, "threads", NULL, 0))
2612         av_dict_set(&opts, "threads", "auto", 0);
2613     if (stream_lowres)
2614         av_dict_set_int(&opts, "lowres", stream_lowres, 0);
2615     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
2616         av_dict_set(&opts, "refcounted_frames", "1", 0);
2617     if ((ret = avcodec_open2(avctx, codec, &opts)) < 0) {
2618         goto fail;
2619     }
2620     if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2621         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2622         ret =  AVERROR_OPTION_NOT_FOUND;
2623         goto fail;
2624     }
2625
2626     is->eof = 0;
2627     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
2628     switch (avctx->codec_type) {
2629     case AVMEDIA_TYPE_AUDIO:
2630 #if CONFIG_AVFILTER
2631         {
2632             AVFilterContext *sink;
2633
2634             is->audio_filter_src.freq           = avctx->sample_rate;
2635             is->audio_filter_src.channels       = avctx->channels;
2636             is->audio_filter_src.channel_layout = get_valid_channel_layout(avctx->channel_layout, avctx->channels);
2637             is->audio_filter_src.fmt            = avctx->sample_fmt;
2638             if ((ret = configure_audio_filters(is, afilters, 0)) < 0)
2639                 goto fail;
2640             sink = is->out_audio_filter;
2641             sample_rate    = av_buffersink_get_sample_rate(sink);
2642             nb_channels    = av_buffersink_get_channels(sink);
2643             channel_layout = av_buffersink_get_channel_layout(sink);
2644         }
2645 #else
2646         sample_rate    = avctx->sample_rate;
2647         nb_channels    = avctx->channels;
2648         channel_layout = avctx->channel_layout;
2649 #endif
2650
2651         /* prepare audio output */
2652         if ((ret = audio_open(is, channel_layout, nb_channels, sample_rate, &is->audio_tgt)) < 0)
2653             goto fail;
2654         is->audio_hw_buf_size = ret;
2655         is->audio_src = is->audio_tgt;
2656         is->audio_buf_size  = 0;
2657         is->audio_buf_index = 0;
2658
2659         /* init averaging filter */
2660         is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2661         is->audio_diff_avg_count = 0;
2662         /* since we do not have a precise anough audio FIFO fullness,
2663            we correct audio sync only if larger than this threshold */
2664         is->audio_diff_threshold = (double)(is->audio_hw_buf_size) / is->audio_tgt.bytes_per_sec;
2665
2666         is->audio_stream = stream_index;
2667         is->audio_st = ic->streams[stream_index];
2668
2669         decoder_init(&is->auddec, avctx, &is->audioq, is->continue_read_thread);
2670         if ((is->ic->iformat->flags & (AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK)) && !is->ic->iformat->read_seek) {
2671             is->auddec.start_pts = is->audio_st->start_time;
2672             is->auddec.start_pts_tb = is->audio_st->time_base;
2673         }
2674         if ((ret = decoder_start(&is->auddec, audio_thread, is)) < 0)
2675             goto out;
2676         SDL_PauseAudio(0);
2677         break;
2678     case AVMEDIA_TYPE_VIDEO:
2679         is->video_stream = stream_index;
2680         is->video_st = ic->streams[stream_index];
2681
2682         decoder_init(&is->viddec, avctx, &is->videoq, is->continue_read_thread);
2683         if ((ret = decoder_start(&is->viddec, video_thread, is)) < 0)
2684             goto out;
2685         is->queue_attachments_req = 1;
2686         break;
2687     case AVMEDIA_TYPE_SUBTITLE:
2688         is->subtitle_stream = stream_index;
2689         is->subtitle_st = ic->streams[stream_index];
2690
2691         decoder_init(&is->subdec, avctx, &is->subtitleq, is->continue_read_thread);
2692         if ((ret = decoder_start(&is->subdec, subtitle_thread, is)) < 0)
2693             goto out;
2694         break;
2695     default:
2696         break;
2697     }
2698     goto out;
2699
2700 fail:
2701     avcodec_free_context(&avctx);
2702 out:
2703     av_dict_free(&opts);
2704
2705     return ret;
2706 }
2707
2708 static int decode_interrupt_cb(void *ctx)
2709 {
2710     VideoState *is = ctx;
2711     return is->abort_request;
2712 }
2713
2714 static int stream_has_enough_packets(AVStream *st, int stream_id, PacketQueue *queue) {
2715     return stream_id < 0 ||
2716            queue->abort_request ||
2717            (st->disposition & AV_DISPOSITION_ATTACHED_PIC) ||
2718            queue->nb_packets > MIN_FRAMES && (!queue->duration || av_q2d(st->time_base) * queue->duration > 1.0);
2719 }
2720
2721 static int is_realtime(AVFormatContext *s)
2722 {
2723     if(   !strcmp(s->iformat->name, "rtp")
2724        || !strcmp(s->iformat->name, "rtsp")
2725        || !strcmp(s->iformat->name, "sdp")
2726     )
2727         return 1;
2728
2729     if(s->pb && (   !strncmp(s->filename, "rtp:", 4)
2730                  || !strncmp(s->filename, "udp:", 4)
2731                 )
2732     )
2733         return 1;
2734     return 0;
2735 }
2736
2737 /* this thread gets the stream from the disk or the network */
2738 static int read_thread(void *arg)
2739 {
2740     VideoState *is = arg;
2741     AVFormatContext *ic = NULL;
2742     int err, i, ret;
2743     int st_index[AVMEDIA_TYPE_NB];
2744     AVPacket pkt1, *pkt = &pkt1;
2745     int64_t stream_start_time;
2746     int pkt_in_play_range = 0;
2747     AVDictionaryEntry *t;
2748     SDL_mutex *wait_mutex = SDL_CreateMutex();
2749     int scan_all_pmts_set = 0;
2750     int64_t pkt_ts;
2751
2752     if (!wait_mutex) {
2753         av_log(NULL, AV_LOG_FATAL, "SDL_CreateMutex(): %s\n", SDL_GetError());
2754         ret = AVERROR(ENOMEM);
2755         goto fail;
2756     }
2757
2758     memset(st_index, -1, sizeof(st_index));
2759     is->last_video_stream = is->video_stream = -1;
2760     is->last_audio_stream = is->audio_stream = -1;
2761     is->last_subtitle_stream = is->subtitle_stream = -1;
2762     is->eof = 0;
2763
2764     ic = avformat_alloc_context();
2765     if (!ic) {
2766         av_log(NULL, AV_LOG_FATAL, "Could not allocate context.\n");
2767         ret = AVERROR(ENOMEM);
2768         goto fail;
2769     }
2770     ic->interrupt_callback.callback = decode_interrupt_cb;
2771     ic->interrupt_callback.opaque = is;
2772     if (!av_dict_get(format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE)) {
2773         av_dict_set(&format_opts, "scan_all_pmts", "1", AV_DICT_DONT_OVERWRITE);
2774         scan_all_pmts_set = 1;
2775     }
2776     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2777     if (err < 0) {
2778         print_error(is->filename, err);
2779         ret = -1;
2780         goto fail;
2781     }
2782     if (scan_all_pmts_set)
2783         av_dict_set(&format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE);
2784
2785     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2786         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2787         ret = AVERROR_OPTION_NOT_FOUND;
2788         goto fail;
2789     }
2790     is->ic = ic;
2791
2792     if (genpts)
2793         ic->flags |= AVFMT_FLAG_GENPTS;
2794
2795     av_format_inject_global_side_data(ic);
2796
2797     if (find_stream_info) {
2798         AVDictionary **opts = setup_find_stream_info_opts(ic, codec_opts);
2799         int orig_nb_streams = ic->nb_streams;
2800
2801         err = avformat_find_stream_info(ic, opts);
2802
2803         for (i = 0; i < orig_nb_streams; i++)
2804             av_dict_free(&opts[i]);
2805         av_freep(&opts);
2806
2807         if (err < 0) {
2808             av_log(NULL, AV_LOG_WARNING,
2809                    "%s: could not find codec parameters\n", is->filename);
2810             ret = -1;
2811             goto fail;
2812         }
2813     }
2814
2815     if (ic->pb)
2816         ic->pb->eof_reached = 0; // FIXME hack, ffplay maybe should not use avio_feof() to test for the end
2817
2818     if (seek_by_bytes < 0)
2819         seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT) && strcmp("ogg", ic->iformat->name);
2820
2821     is->max_frame_duration = (ic->iformat->flags & AVFMT_TS_DISCONT) ? 10.0 : 3600.0;
2822
2823     if (!window_title && (t = av_dict_get(ic->metadata, "title", NULL, 0)))
2824         window_title = av_asprintf("%s - %s", t->value, input_filename);
2825
2826     /* if seeking requested, we execute it */
2827     if (start_time != AV_NOPTS_VALUE) {
2828         int64_t timestamp;
2829
2830         timestamp = start_time;
2831         /* add the stream start time */
2832         if (ic->start_time != AV_NOPTS_VALUE)
2833             timestamp += ic->start_time;
2834         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
2835         if (ret < 0) {
2836             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
2837                     is->filename, (double)timestamp / AV_TIME_BASE);
2838         }
2839     }
2840
2841     is->realtime = is_realtime(ic);
2842
2843     if (show_status)
2844         av_dump_format(ic, 0, is->filename, 0);
2845
2846     for (i = 0; i < ic->nb_streams; i++) {
2847         AVStream *st = ic->streams[i];
2848         enum AVMediaType type = st->codecpar->codec_type;
2849         st->discard = AVDISCARD_ALL;
2850         if (type >= 0 && wanted_stream_spec[type] && st_index[type] == -1)
2851             if (avformat_match_stream_specifier(ic, st, wanted_stream_spec[type]) > 0)
2852                 st_index[type] = i;
2853     }
2854     for (i = 0; i < AVMEDIA_TYPE_NB; i++) {
2855         if (wanted_stream_spec[i] && st_index[i] == -1) {
2856             av_log(NULL, AV_LOG_ERROR, "Stream specifier %s does not match any %s stream\n", wanted_stream_spec[i], av_get_media_type_string(i));
2857             st_index[i] = INT_MAX;
2858         }
2859     }
2860
2861     if (!video_disable)
2862         st_index[AVMEDIA_TYPE_VIDEO] =
2863             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
2864                                 st_index[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
2865     if (!audio_disable)
2866         st_index[AVMEDIA_TYPE_AUDIO] =
2867             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
2868                                 st_index[AVMEDIA_TYPE_AUDIO],
2869                                 st_index[AVMEDIA_TYPE_VIDEO],
2870                                 NULL, 0);
2871     if (!video_disable && !subtitle_disable)
2872         st_index[AVMEDIA_TYPE_SUBTITLE] =
2873             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
2874                                 st_index[AVMEDIA_TYPE_SUBTITLE],
2875                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
2876                                  st_index[AVMEDIA_TYPE_AUDIO] :
2877                                  st_index[AVMEDIA_TYPE_VIDEO]),
2878                                 NULL, 0);
2879
2880     is->show_mode = show_mode;
2881     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2882         AVStream *st = ic->streams[st_index[AVMEDIA_TYPE_VIDEO]];
2883         AVCodecParameters *codecpar = st->codecpar;
2884         AVRational sar = av_guess_sample_aspect_ratio(ic, st, NULL);
2885         if (codecpar->width)
2886             set_default_window_size(codecpar->width, codecpar->height, sar);
2887     }
2888
2889     /* open the streams */
2890     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
2891         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2892     }
2893
2894     ret = -1;
2895     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2896         ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2897     }
2898     if (is->show_mode == SHOW_MODE_NONE)
2899         is->show_mode = ret >= 0 ? SHOW_MODE_VIDEO : SHOW_MODE_RDFT;
2900
2901     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
2902         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2903     }
2904
2905     if (is->video_stream < 0 && is->audio_stream < 0) {
2906         av_log(NULL, AV_LOG_FATAL, "Failed to open file '%s' or configure filtergraph\n",
2907                is->filename);
2908         ret = -1;
2909         goto fail;
2910     }
2911
2912     if (infinite_buffer < 0 && is->realtime)
2913         infinite_buffer = 1;
2914
2915     for (;;) {
2916         if (is->abort_request)
2917             break;
2918         if (is->paused != is->last_paused) {
2919             is->last_paused = is->paused;
2920             if (is->paused)
2921                 is->read_pause_return = av_read_pause(ic);
2922             else
2923                 av_read_play(ic);
2924         }
2925 #if CONFIG_RTSP_DEMUXER || CONFIG_MMSH_PROTOCOL
2926         if (is->paused &&
2927                 (!strcmp(ic->iformat->name, "rtsp") ||
2928                  (ic->pb && !strncmp(input_filename, "mmsh:", 5)))) {
2929             /* wait 10 ms to avoid trying to get another packet */
2930             /* XXX: horrible */
2931             SDL_Delay(10);
2932             continue;
2933         }
2934 #endif
2935         if (is->seek_req) {
2936             int64_t seek_target = is->seek_pos;
2937             int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2938             int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2939 // FIXME the +-2 is due to rounding being not done in the correct direction in generation
2940 //      of the seek_pos/seek_rel variables
2941
2942             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2943             if (ret < 0) {
2944                 av_log(NULL, AV_LOG_ERROR,
2945                        "%s: error while seeking\n", is->ic->filename);
2946             } else {
2947                 if (is->audio_stream >= 0) {
2948                     packet_queue_flush(&is->audioq);
2949                     packet_queue_put(&is->audioq, &flush_pkt);
2950                 }
2951                 if (is->subtitle_stream >= 0) {
2952                     packet_queue_flush(&is->subtitleq);
2953                     packet_queue_put(&is->subtitleq, &flush_pkt);
2954                 }
2955                 if (is->video_stream >= 0) {
2956                     packet_queue_flush(&is->videoq);
2957                     packet_queue_put(&is->videoq, &flush_pkt);
2958                 }
2959                 if (is->seek_flags & AVSEEK_FLAG_BYTE) {
2960                    set_clock(&is->extclk, NAN, 0);
2961                 } else {
2962                    set_clock(&is->extclk, seek_target / (double)AV_TIME_BASE, 0);
2963                 }
2964             }
2965             is->seek_req = 0;
2966             is->queue_attachments_req = 1;
2967             is->eof = 0;
2968             if (is->paused)
2969                 step_to_next_frame(is);
2970         }
2971         if (is->queue_attachments_req) {
2972             if (is->video_st && is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC) {
2973                 AVPacket copy = { 0 };
2974                 if ((ret = av_packet_ref(&copy, &is->video_st->attached_pic)) < 0)
2975                     goto fail;
2976                 packet_queue_put(&is->videoq, &copy);
2977                 packet_queue_put_nullpacket(&is->videoq, is->video_stream);
2978             }
2979             is->queue_attachments_req = 0;
2980         }
2981
2982         /* if the queue are full, no need to read more */
2983         if (infinite_buffer<1 &&
2984               (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2985             || (stream_has_enough_packets(is->audio_st, is->audio_stream, &is->audioq) &&
2986                 stream_has_enough_packets(is->video_st, is->video_stream, &is->videoq) &&
2987                 stream_has_enough_packets(is->subtitle_st, is->subtitle_stream, &is->subtitleq)))) {
2988             /* wait 10 ms */
2989             SDL_LockMutex(wait_mutex);
2990             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2991             SDL_UnlockMutex(wait_mutex);
2992             continue;
2993         }
2994         if (!is->paused &&
2995             (!is->audio_st || (is->auddec.finished == is->audioq.serial && frame_queue_nb_remaining(&is->sampq) == 0)) &&
2996             (!is->video_st || (is->viddec.finished == is->videoq.serial && frame_queue_nb_remaining(&is->pictq) == 0))) {
2997             if (loop != 1 && (!loop || --loop)) {
2998                 stream_seek(is, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
2999             } else if (autoexit) {
3000                 ret = AVERROR_EOF;
3001                 goto fail;
3002             }
3003         }
3004         ret = av_read_frame(ic, pkt);
3005         if (ret < 0) {
3006             if ((ret == AVERROR_EOF || avio_feof(ic->pb)) && !is->eof) {
3007                 if (is->video_stream >= 0)
3008                     packet_queue_put_nullpacket(&is->videoq, is->video_stream);
3009                 if (is->audio_stream >= 0)
3010                     packet_queue_put_nullpacket(&is->audioq, is->audio_stream);
3011                 if (is->subtitle_stream >= 0)
3012                     packet_queue_put_nullpacket(&is->subtitleq, is->subtitle_stream);
3013                 is->eof = 1;
3014             }
3015             if (ic->pb && ic->pb->error)
3016                 break;
3017             SDL_LockMutex(wait_mutex);
3018             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
3019             SDL_UnlockMutex(wait_mutex);
3020             continue;
3021         } else {
3022             is->eof = 0;
3023         }
3024         /* check if packet is in play range specified by user, then queue, otherwise discard */
3025         stream_start_time = ic->streams[pkt->stream_index]->start_time;
3026         pkt_ts = pkt->pts == AV_NOPTS_VALUE ? pkt->dts : pkt->pts;
3027         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
3028                 (pkt_ts - (stream_start_time != AV_NOPTS_VALUE ? stream_start_time : 0)) *
3029                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
3030                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
3031                 <= ((double)duration / 1000000);
3032         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
3033             packet_queue_put(&is->audioq, pkt);
3034         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range
3035                    && !(is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
3036             packet_queue_put(&is->videoq, pkt);
3037         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
3038             packet_queue_put(&is->subtitleq, pkt);
3039         } else {
3040             av_packet_unref(pkt);
3041         }
3042     }
3043
3044     ret = 0;
3045  fail:
3046     if (ic && !is->ic)
3047         avformat_close_input(&ic);
3048
3049     if (ret != 0) {
3050         SDL_Event event;
3051
3052         event.type = FF_QUIT_EVENT;
3053         event.user.data1 = is;
3054         SDL_PushEvent(&event);
3055     }
3056     SDL_DestroyMutex(wait_mutex);
3057     return 0;
3058 }
3059
3060 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
3061 {
3062     VideoState *is;
3063
3064     is = av_mallocz(sizeof(VideoState));
3065     if (!is)
3066         return NULL;
3067     is->filename = av_strdup(filename);
3068     if (!is->filename)
3069         goto fail;
3070     is->iformat = iformat;
3071     is->ytop    = 0;
3072     is->xleft   = 0;
3073
3074     /* start video display */
3075     if (frame_queue_init(&is->pictq, &is->videoq, VIDEO_PICTURE_QUEUE_SIZE, 1) < 0)
3076         goto fail;
3077     if (frame_queue_init(&is->subpq, &is->subtitleq, SUBPICTURE_QUEUE_SIZE, 0) < 0)
3078         goto fail;
3079     if (frame_queue_init(&is->sampq, &is->audioq, SAMPLE_QUEUE_SIZE, 1) < 0)
3080         goto fail;
3081
3082     if (packet_queue_init(&is->videoq) < 0 ||
3083         packet_queue_init(&is->audioq) < 0 ||
3084         packet_queue_init(&is->subtitleq) < 0)
3085         goto fail;
3086
3087     if (!(is->continue_read_thread = SDL_CreateCond())) {
3088         av_log(NULL, AV_LOG_FATAL, "SDL_CreateCond(): %s\n", SDL_GetError());
3089         goto fail;
3090     }
3091
3092     init_clock(&is->vidclk, &is->videoq.serial);
3093     init_clock(&is->audclk, &is->audioq.serial);
3094     init_clock(&is->extclk, &is->extclk.serial);
3095     is->audio_clock_serial = -1;
3096     if (startup_volume < 0)
3097         av_log(NULL, AV_LOG_WARNING, "-volume=%d < 0, setting to 0\n", startup_volume);
3098     if (startup_volume > 100)
3099         av_log(NULL, AV_LOG_WARNING, "-volume=%d > 100, setting to 100\n", startup_volume);
3100     startup_volume = av_clip(startup_volume, 0, 100);
3101     startup_volume = av_clip(SDL_MIX_MAXVOLUME * startup_volume / 100, 0, SDL_MIX_MAXVOLUME);
3102     is->audio_volume = startup_volume;
3103     is->muted = 0;
3104     is->av_sync_type = av_sync_type;
3105     is->read_tid     = SDL_CreateThread(read_thread, "read_thread", is);
3106     if (!is->read_tid) {
3107         av_log(NULL, AV_LOG_FATAL, "SDL_CreateThread(): %s\n", SDL_GetError());
3108 fail:
3109         stream_close(is);
3110         return NULL;
3111     }
3112     return is;
3113 }
3114
3115 static void stream_cycle_channel(VideoState *is, int codec_type)
3116 {
3117     AVFormatContext *ic = is->ic;
3118     int start_index, stream_index;
3119     int old_index;
3120     AVStream *st;
3121     AVProgram *p = NULL;
3122     int nb_streams = is->ic->nb_streams;
3123
3124     if (codec_type == AVMEDIA_TYPE_VIDEO) {
3125         start_index = is->last_video_stream;
3126         old_index = is->video_stream;
3127     } else if (codec_type == AVMEDIA_TYPE_AUDIO) {
3128         start_index = is->last_audio_stream;
3129         old_index = is->audio_stream;
3130     } else {
3131         start_index = is->last_subtitle_stream;
3132         old_index = is->subtitle_stream;
3133     }
3134     stream_index = start_index;
3135
3136     if (codec_type != AVMEDIA_TYPE_VIDEO && is->video_stream != -1) {
3137         p = av_find_program_from_stream(ic, NULL, is->video_stream);
3138         if (p) {
3139             nb_streams = p->nb_stream_indexes;
3140             for (start_index = 0; start_index < nb_streams; start_index++)
3141                 if (p->stream_index[start_index] == stream_index)
3142                     break;
3143             if (start_index == nb_streams)
3144                 start_index = -1;
3145             stream_index = start_index;
3146         }
3147     }
3148
3149     for (;;) {
3150         if (++stream_index >= nb_streams)
3151         {
3152             if (codec_type == AVMEDIA_TYPE_SUBTITLE)
3153             {
3154                 stream_index = -1;
3155                 is->last_subtitle_stream = -1;
3156                 goto the_end;
3157             }
3158             if (start_index == -1)
3159                 return;
3160             stream_index = 0;
3161         }
3162         if (stream_index == start_index)
3163             return;
3164         st = is->ic->streams[p ? p->stream_index[stream_index] : stream_index];
3165         if (st->codecpar->codec_type == codec_type) {
3166             /* check that parameters are OK */
3167             switch (codec_type) {
3168             case AVMEDIA_TYPE_AUDIO:
3169                 if (st->codecpar->sample_rate != 0 &&
3170                     st->codecpar->channels != 0)
3171                     goto the_end;
3172                 break;
3173             case AVMEDIA_TYPE_VIDEO:
3174             case AVMEDIA_TYPE_SUBTITLE:
3175                 goto the_end;
3176             default:
3177                 break;
3178             }
3179         }
3180     }
3181  the_end:
3182     if (p && stream_index != -1)
3183         stream_index = p->stream_index[stream_index];
3184     av_log(NULL, AV_LOG_INFO, "Switch %s stream from #%d to #%d\n",
3185            av_get_media_type_string(codec_type),
3186            old_index,
3187            stream_index);
3188
3189     stream_component_close(is, old_index);
3190     stream_component_open(is, stream_index);
3191 }
3192
3193
3194 static void toggle_full_screen(VideoState *is)
3195 {
3196     is_full_screen = !is_full_screen;
3197     SDL_SetWindowFullscreen(window, is_full_screen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
3198 }
3199
3200 static void toggle_audio_display(VideoState *is)
3201 {
3202     int next = is->show_mode;
3203     do {
3204         next = (next + 1) % SHOW_MODE_NB;
3205     } while (next != is->show_mode && (next == SHOW_MODE_VIDEO && !is->video_st || next != SHOW_MODE_VIDEO && !is->audio_st));
3206     if (is->show_mode != next) {
3207         is->force_refresh = 1;
3208         is->show_mode = next;
3209     }
3210 }
3211
3212 static void refresh_loop_wait_event(VideoState *is, SDL_Event *event) {
3213     double remaining_time = 0.0;
3214     SDL_PumpEvents();
3215     while (!SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_FIRSTEVENT, SDL_LASTEVENT)) {
3216         if (!cursor_hidden && av_gettime_relative() - cursor_last_shown > CURSOR_HIDE_DELAY) {
3217             SDL_ShowCursor(0);
3218             cursor_hidden = 1;
3219         }
3220         if (remaining_time > 0.0)
3221             av_usleep((int64_t)(remaining_time * 1000000.0));
3222         remaining_time = REFRESH_RATE;
3223         if (is->show_mode != SHOW_MODE_NONE && (!is->paused || is->force_refresh))
3224             video_refresh(is, &remaining_time);
3225         SDL_PumpEvents();
3226     }
3227 }
3228
3229 static void seek_chapter(VideoState *is, int incr)
3230 {
3231     int64_t pos = get_master_clock(is) * AV_TIME_BASE;
3232     int i;
3233
3234     if (!is->ic->nb_chapters)
3235         return;
3236
3237     /* find the current chapter */
3238     for (i = 0; i < is->ic->nb_chapters; i++) {
3239         AVChapter *ch = is->ic->chapters[i];
3240         if (av_compare_ts(pos, AV_TIME_BASE_Q, ch->start, ch->time_base) < 0) {
3241             i--;
3242             break;
3243         }
3244     }
3245
3246     i += incr;
3247     i = FFMAX(i, 0);
3248     if (i >= is->ic->nb_chapters)
3249         return;
3250
3251     av_log(NULL, AV_LOG_VERBOSE, "Seeking to chapter %d.\n", i);
3252     stream_seek(is, av_rescale_q(is->ic->chapters[i]->start, is->ic->chapters[i]->time_base,
3253                                  AV_TIME_BASE_Q), 0, 0);
3254 }
3255
3256 /* handle an event sent by the GUI */
3257 static void event_loop(VideoState *cur_stream)
3258 {
3259     SDL_Event event;
3260     double incr, pos, frac;
3261
3262     for (;;) {
3263         double x;
3264         refresh_loop_wait_event(cur_stream, &event);
3265         switch (event.type) {
3266         case SDL_KEYDOWN:
3267             if (exit_on_keydown) {
3268                 do_exit(cur_stream);
3269                 break;
3270             }
3271             switch (event.key.keysym.sym) {
3272             case SDLK_ESCAPE:
3273             case SDLK_q:
3274                 do_exit(cur_stream);
3275                 break;
3276             case SDLK_f:
3277                 toggle_full_screen(cur_stream);
3278                 cur_stream->force_refresh = 1;
3279                 break;
3280             case SDLK_p:
3281             case SDLK_SPACE:
3282                 toggle_pause(cur_stream);
3283                 break;
3284             case SDLK_m:
3285                 toggle_mute(cur_stream);
3286                 break;
3287             case SDLK_KP_MULTIPLY:
3288             case SDLK_0:
3289                 update_volume(cur_stream, 1, SDL_VOLUME_STEP);
3290                 break;
3291             case SDLK_KP_DIVIDE:
3292             case SDLK_9:
3293                 update_volume(cur_stream, -1, SDL_VOLUME_STEP);
3294                 break;
3295             case SDLK_s: // S: Step to next frame
3296                 step_to_next_frame(cur_stream);
3297                 break;
3298             case SDLK_a:
3299                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3300                 break;
3301             case SDLK_v:
3302                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3303                 break;
3304             case SDLK_c:
3305                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3306                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3307                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3308                 break;
3309             case SDLK_t:
3310                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3311                 break;
3312             case SDLK_w:
3313 #if CONFIG_AVFILTER
3314                 if (cur_stream->show_mode == SHOW_MODE_VIDEO && cur_stream->vfilter_idx < nb_vfilters - 1) {
3315                     if (++cur_stream->vfilter_idx >= nb_vfilters)
3316                         cur_stream->vfilter_idx = 0;
3317                 } else {
3318                     cur_stream->vfilter_idx = 0;
3319                     toggle_audio_display(cur_stream);
3320                 }
3321 #else
3322                 toggle_audio_display(cur_stream);
3323 #endif
3324                 break;
3325             case SDLK_PAGEUP:
3326                 if (cur_stream->ic->nb_chapters <= 1) {
3327                     incr = 600.0;
3328                     goto do_seek;
3329                 }
3330                 seek_chapter(cur_stream, 1);
3331                 break;
3332             case SDLK_PAGEDOWN:
3333                 if (cur_stream->ic->nb_chapters <= 1) {
3334                     incr = -600.0;
3335                     goto do_seek;
3336                 }
3337                 seek_chapter(cur_stream, -1);
3338                 break;
3339             case SDLK_LEFT:
3340                 incr = -10.0;
3341                 goto do_seek;
3342             case SDLK_RIGHT:
3343                 incr = 10.0;
3344                 goto do_seek;
3345             case SDLK_UP:
3346                 incr = 60.0;
3347                 goto do_seek;
3348             case SDLK_DOWN:
3349                 incr = -60.0;
3350             do_seek:
3351                     if (seek_by_bytes) {
3352                         pos = -1;
3353                         if (pos < 0 && cur_stream->video_stream >= 0)
3354                             pos = frame_queue_last_pos(&cur_stream->pictq);
3355                         if (pos < 0 && cur_stream->audio_stream >= 0)
3356                             pos = frame_queue_last_pos(&cur_stream->sampq);
3357                         if (pos < 0)
3358                             pos = avio_tell(cur_stream->ic->pb);
3359                         if (cur_stream->ic->bit_rate)
3360                             incr *= cur_stream->ic->bit_rate / 8.0;
3361                         else
3362                             incr *= 180000.0;
3363                         pos += incr;
3364                         stream_seek(cur_stream, pos, incr, 1);
3365                     } else {
3366                         pos = get_master_clock(cur_stream);
3367                         if (isnan(pos))
3368                             pos = (double)cur_stream->seek_pos / AV_TIME_BASE;
3369                         pos += incr;
3370                         if (cur_stream->ic->start_time != AV_NOPTS_VALUE && pos < cur_stream->ic->start_time / (double)AV_TIME_BASE)
3371                             pos = cur_stream->ic->start_time / (double)AV_TIME_BASE;
3372                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
3373                     }
3374                 break;
3375             default:
3376                 break;
3377             }
3378             break;
3379         case SDL_MOUSEBUTTONDOWN:
3380             if (exit_on_mousedown) {
3381                 do_exit(cur_stream);
3382                 break;
3383             }
3384             if (event.button.button == SDL_BUTTON_LEFT) {
3385                 static int64_t last_mouse_left_click = 0;
3386                 if (av_gettime_relative() - last_mouse_left_click <= 500000) {
3387                     toggle_full_screen(cur_stream);
3388                     cur_stream->force_refresh = 1;
3389                     last_mouse_left_click = 0;
3390                 } else {
3391                     last_mouse_left_click = av_gettime_relative();
3392                 }
3393             }
3394         case SDL_MOUSEMOTION:
3395             if (cursor_hidden) {
3396                 SDL_ShowCursor(1);
3397                 cursor_hidden = 0;
3398             }
3399             cursor_last_shown = av_gettime_relative();
3400             if (event.type == SDL_MOUSEBUTTONDOWN) {
3401                 if (event.button.button != SDL_BUTTON_RIGHT)
3402                     break;
3403                 x = event.button.x;
3404             } else {
3405                 if (!(event.motion.state & SDL_BUTTON_RMASK))
3406                     break;
3407                 x = event.motion.x;
3408             }
3409                 if (seek_by_bytes || cur_stream->ic->duration <= 0) {
3410                     uint64_t size =  avio_size(cur_stream->ic->pb);
3411                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
3412                 } else {
3413                     int64_t ts;
3414                     int ns, hh, mm, ss;
3415                     int tns, thh, tmm, tss;
3416                     tns  = cur_stream->ic->duration / 1000000LL;
3417                     thh  = tns / 3600;
3418                     tmm  = (tns % 3600) / 60;
3419                     tss  = (tns % 60);
3420                     frac = x / cur_stream->width;
3421                     ns   = frac * tns;
3422                     hh   = ns / 3600;
3423                     mm   = (ns % 3600) / 60;
3424                     ss   = (ns % 60);
3425                     av_log(NULL, AV_LOG_INFO,
3426                            "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
3427                             hh, mm, ss, thh, tmm, tss);
3428                     ts = frac * cur_stream->ic->duration;
3429                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
3430                         ts += cur_stream->ic->start_time;
3431                     stream_seek(cur_stream, ts, 0, 0);
3432                 }
3433             break;
3434         case SDL_WINDOWEVENT:
3435             switch (event.window.event) {
3436                 case SDL_WINDOWEVENT_RESIZED:
3437                     screen_width  = cur_stream->width  = event.window.data1;
3438                     screen_height = cur_stream->height = event.window.data2;
3439                     if (cur_stream->vis_texture) {
3440                         SDL_DestroyTexture(cur_stream->vis_texture);
3441                         cur_stream->vis_texture = NULL;
3442                     }
3443                 case SDL_WINDOWEVENT_EXPOSED:
3444                     cur_stream->force_refresh = 1;
3445             }
3446             break;
3447         case SDL_QUIT:
3448         case FF_QUIT_EVENT:
3449             do_exit(cur_stream);
3450             break;
3451         default:
3452             break;
3453         }
3454     }
3455 }
3456
3457 static int opt_frame_size(void *optctx, const char *opt, const char *arg)
3458 {
3459     av_log(NULL, AV_LOG_WARNING, "Option -s is deprecated, use -video_size.\n");
3460     return opt_default(NULL, "video_size", arg);
3461 }
3462
3463 static int opt_width(void *optctx, const char *opt, const char *arg)
3464 {
3465     screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3466     return 0;
3467 }
3468
3469 static int opt_height(void *optctx, const char *opt, const char *arg)
3470 {
3471     screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3472     return 0;
3473 }
3474
3475 static int opt_format(void *optctx, const char *opt, const char *arg)
3476 {
3477     file_iformat = av_find_input_format(arg);
3478     if (!file_iformat) {
3479         av_log(NULL, AV_LOG_FATAL, "Unknown input format: %s\n", arg);
3480         return AVERROR(EINVAL);
3481     }
3482     return 0;
3483 }
3484
3485 static int opt_frame_pix_fmt(void *optctx, const char *opt, const char *arg)
3486 {
3487     av_log(NULL, AV_LOG_WARNING, "Option -pix_fmt is deprecated, use -pixel_format.\n");
3488     return opt_default(NULL, "pixel_format", arg);
3489 }
3490
3491 static int opt_sync(void *optctx, const char *opt, const char *arg)
3492 {
3493     if (!strcmp(arg, "audio"))
3494         av_sync_type = AV_SYNC_AUDIO_MASTER;
3495     else if (!strcmp(arg, "video"))
3496         av_sync_type = AV_SYNC_VIDEO_MASTER;
3497     else if (!strcmp(arg, "ext"))
3498         av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
3499     else {
3500         av_log(NULL, AV_LOG_ERROR, "Unknown value for %s: %s\n", opt, arg);
3501         exit(1);
3502     }
3503     return 0;
3504 }
3505
3506 static int opt_seek(void *optctx, const char *opt, const char *arg)
3507 {
3508     start_time = parse_time_or_die(opt, arg, 1);
3509     return 0;
3510 }
3511
3512 static int opt_duration(void *optctx, const char *opt, const char *arg)
3513 {
3514     duration = parse_time_or_die(opt, arg, 1);
3515     return 0;
3516 }
3517
3518 static int opt_show_mode(void *optctx, const char *opt, const char *arg)
3519 {
3520     show_mode = !strcmp(arg, "video") ? SHOW_MODE_VIDEO :
3521                 !strcmp(arg, "waves") ? SHOW_MODE_WAVES :
3522                 !strcmp(arg, "rdft" ) ? SHOW_MODE_RDFT  :
3523                 parse_number_or_die(opt, arg, OPT_INT, 0, SHOW_MODE_NB-1);
3524     return 0;
3525 }
3526
3527 static void opt_input_file(void *optctx, const char *filename)
3528 {
3529     if (input_filename) {
3530         av_log(NULL, AV_LOG_FATAL,
3531                "Argument '%s' provided as input filename, but '%s' was already specified.\n",
3532                 filename, input_filename);
3533         exit(1);
3534     }
3535     if (!strcmp(filename, "-"))
3536         filename = "pipe:";
3537     input_filename = filename;
3538 }
3539
3540 static int opt_codec(void *optctx, const char *opt, const char *arg)
3541 {
3542    const char *spec = strchr(opt, ':');
3543    if (!spec) {
3544        av_log(NULL, AV_LOG_ERROR,
3545               "No media specifier was specified in '%s' in option '%s'\n",
3546                arg, opt);
3547        return AVERROR(EINVAL);
3548    }
3549    spec++;
3550    switch (spec[0]) {
3551    case 'a' :    audio_codec_name = arg; break;
3552    case 's' : subtitle_codec_name = arg; break;
3553    case 'v' :    video_codec_name = arg; break;
3554    default:
3555        av_log(NULL, AV_LOG_ERROR,
3556               "Invalid media specifier '%s' in option '%s'\n", spec, opt);
3557        return AVERROR(EINVAL);
3558    }
3559    return 0;
3560 }
3561
3562 static int dummy;
3563
3564 static const OptionDef options[] = {
3565     CMDUTILS_COMMON_OPTIONS
3566     { "x", HAS_ARG, { .func_arg = opt_width }, "force displayed width", "width" },
3567     { "y", HAS_ARG, { .func_arg = opt_height }, "force displayed height", "height" },
3568     { "s", HAS_ARG | OPT_VIDEO, { .func_arg = opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
3569     { "fs", OPT_BOOL, { &is_full_screen }, "force full screen" },
3570     { "an", OPT_BOOL, { &audio_disable }, "disable audio" },
3571     { "vn", OPT_BOOL, { &video_disable }, "disable video" },
3572     { "sn", OPT_BOOL, { &subtitle_disable }, "disable subtitling" },
3573     { "ast", OPT_STRING | HAS_ARG | OPT_EXPERT, { &wanted_stream_spec[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_specifier" },
3574     { "vst", OPT_STRING | HAS_ARG | OPT_EXPERT, { &wanted_stream_spec[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_specifier" },
3575     { "sst", OPT_STRING | HAS_ARG | OPT_EXPERT, { &wanted_stream_spec[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_specifier" },
3576     { "ss", HAS_ARG, { .func_arg = opt_seek }, "seek to a given position in seconds", "pos" },
3577     { "t", HAS_ARG, { .func_arg = opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
3578     { "bytes", OPT_INT | HAS_ARG, { &seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
3579     { "nodisp", OPT_BOOL, { &display_disable }, "disable graphical display" },
3580     { "noborder", OPT_BOOL, { &borderless }, "borderless window" },
3581     { "volume", OPT_INT | HAS_ARG, { &startup_volume}, "set startup volume 0=min 100=max", "volume" },
3582     { "f", HAS_ARG, { .func_arg = opt_format }, "force format", "fmt" },
3583     { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_frame_pix_fmt }, "set pixel format", "format" },
3584     { "stats", OPT_BOOL | OPT_EXPERT, { &show_status }, "show status", "" },
3585     { "fast", OPT_BOOL | OPT_EXPERT, { &fast }, "non spec compliant optimizations", "" },
3586     { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
3587     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
3588     { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, { &lowres }, "", "" },
3589     { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
3590     { "autoexit", OPT_BOOL | OPT_EXPERT, { &autoexit }, "exit at the end", "" },
3591     { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { &exit_on_keydown }, "exit on key down", "" },
3592     { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { &exit_on_mousedown }, "exit on mouse down", "" },
3593     { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { &loop }, "set number of times the playback shall be looped", "loop count" },
3594     { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
3595     { "infbuf", OPT_BOOL | OPT_EXPERT, { &infinite_buffer }, "don't limit the input buffer size (useful with realtime streams)", "" },
3596     { "window_title", OPT_STRING | HAS_ARG, { &window_title }, "set window title", "window title" },
3597 #if CONFIG_AVFILTER
3598     { "vf", OPT_EXPERT | HAS_ARG, { .func_arg = opt_add_vfilter }, "set video filters", "filter_graph" },
3599     { "af", OPT_STRING | HAS_ARG, { &afilters }, "set audio filters", "filter_graph" },
3600 #endif
3601     { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { &rdftspeed }, "rdft speed", "msecs" },
3602     { "showmode", HAS_ARG, { .func_arg = opt_show_mode}, "select show mode (0 = video, 1 = waves, 2 = RDFT)", "mode" },
3603     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { .func_arg = opt_default }, "generic catch all option", "" },
3604     { "i", OPT_BOOL, { &dummy}, "read specified file", "input_file"},
3605     { "codec", HAS_ARG, { .func_arg = opt_codec}, "force decoder", "decoder_name" },
3606     { "acodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &audio_codec_name }, "force audio decoder",    "decoder_name" },
3607     { "scodec", HAS_ARG | OPT_STRING | OPT_EXPERT, { &subtitle_codec_name }, "force subtitle decoder", "decoder_name" },
3608     { "vcodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &video_codec_name }, "force video decoder",    "decoder_name" },
3609     { "autorotate", OPT_BOOL, { &autorotate }, "automatically rotate video", "" },
3610     { "find_stream_info", OPT_BOOL | OPT_INPUT | OPT_EXPERT, { &find_stream_info },
3611         "read and decode the streams to fill missing information with heuristics" },
3612     { NULL, },
3613 };
3614
3615 static void show_usage(void)
3616 {
3617     av_log(NULL, AV_LOG_INFO, "Simple media player\n");
3618     av_log(NULL, AV_LOG_INFO, "usage: %s [options] input_file\n", program_name);
3619     av_log(NULL, AV_LOG_INFO, "\n");
3620 }
3621
3622 void show_help_default(const char *opt, const char *arg)
3623 {
3624     av_log_set_callback(log_callback_help);
3625     show_usage();
3626     show_help_options(options, "Main options:", 0, OPT_EXPERT, 0);
3627     show_help_options(options, "Advanced options:", OPT_EXPERT, 0, 0);
3628     printf("\n");
3629     show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3630     show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3631 #if !CONFIG_AVFILTER
3632     show_help_children(sws_get_class(), AV_OPT_FLAG_ENCODING_PARAM);
3633 #else
3634     show_help_children(avfilter_get_class(), AV_OPT_FLAG_FILTERING_PARAM);
3635 #endif
3636     printf("\nWhile playing:\n"
3637            "q, ESC              quit\n"
3638            "f                   toggle full screen\n"
3639            "p, SPC              pause\n"
3640            "m                   toggle mute\n"
3641            "9, 0                decrease and increase volume respectively\n"
3642            "/, *                decrease and increase volume respectively\n"
3643            "a                   cycle audio channel in the current program\n"
3644            "v                   cycle video channel\n"
3645            "t                   cycle subtitle channel in the current program\n"
3646            "c                   cycle program\n"
3647            "w                   cycle video filters or show modes\n"
3648            "s                   activate frame-step mode\n"
3649            "left/right          seek backward/forward 10 seconds\n"
3650            "down/up             seek backward/forward 1 minute\n"
3651            "page down/page up   seek backward/forward 10 minutes\n"
3652            "right mouse click   seek to percentage in file corresponding to fraction of width\n"
3653            "left double-click   toggle full screen\n"
3654            );
3655 }
3656
3657 static int lockmgr(void **mtx, enum AVLockOp op)
3658 {
3659    switch(op) {
3660       case AV_LOCK_CREATE:
3661           *mtx = SDL_CreateMutex();
3662           if(!*mtx) {
3663               av_log(NULL, AV_LOG_FATAL, "SDL_CreateMutex(): %s\n", SDL_GetError());
3664               return 1;
3665           }
3666           return 0;
3667       case AV_LOCK_OBTAIN:
3668           return !!SDL_LockMutex(*mtx);
3669       case AV_LOCK_RELEASE:
3670           return !!SDL_UnlockMutex(*mtx);
3671       case AV_LOCK_DESTROY:
3672           SDL_DestroyMutex(*mtx);
3673           return 0;
3674    }
3675    return 1;
3676 }
3677
3678 /* Called from the main */
3679 int main(int argc, char **argv)
3680 {
3681     int flags;
3682     VideoState *is;
3683
3684     init_dynload();
3685
3686     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3687     parse_loglevel(argc, argv, options);
3688
3689     /* register all codecs, demux and protocols */
3690 #if CONFIG_AVDEVICE
3691     avdevice_register_all();
3692 #endif
3693 #if CONFIG_AVFILTER
3694     avfilter_register_all();
3695 #endif
3696     av_register_all();
3697     avformat_network_init();
3698
3699     init_opts();
3700
3701     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
3702     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
3703
3704     show_banner(argc, argv, options);
3705
3706     parse_options(NULL, argc, argv, options, opt_input_file);
3707
3708     if (!input_filename) {
3709         show_usage();
3710         av_log(NULL, AV_LOG_FATAL, "An input file must be specified\n");
3711         av_log(NULL, AV_LOG_FATAL,
3712                "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3713         exit(1);
3714     }
3715
3716     if (display_disable) {
3717         video_disable = 1;
3718     }
3719     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
3720     if (audio_disable)
3721         flags &= ~SDL_INIT_AUDIO;
3722     else {
3723         /* Try to work around an occasional ALSA buffer underflow issue when the
3724          * period size is NPOT due to ALSA resampling by forcing the buffer size. */
3725         if (!SDL_getenv("SDL_AUDIO_ALSA_SET_BUFFER_SIZE"))
3726             SDL_setenv("SDL_AUDIO_ALSA_SET_BUFFER_SIZE","1", 1);
3727     }
3728     if (display_disable)
3729         flags &= ~SDL_INIT_VIDEO;
3730     if (SDL_Init (flags)) {
3731         av_log(NULL, AV_LOG_FATAL, "Could not initialize SDL - %s\n", SDL_GetError());
3732         av_log(NULL, AV_LOG_FATAL, "(Did you set the DISPLAY variable?)\n");
3733         exit(1);
3734     }
3735
3736     SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
3737     SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
3738
3739     if (av_lockmgr_register(lockmgr)) {
3740         av_log(NULL, AV_LOG_FATAL, "Could not initialize lock manager!\n");
3741         do_exit(NULL);
3742     }
3743
3744     av_init_packet(&flush_pkt);
3745     flush_pkt.data = (uint8_t *)&flush_pkt;
3746
3747     is = stream_open(input_filename, file_iformat);
3748     if (!is) {
3749         av_log(NULL, AV_LOG_FATAL, "Failed to initialize VideoState!\n");
3750         do_exit(NULL);
3751     }
3752
3753     event_loop(is);
3754
3755     /* never returns */
3756
3757     return 0;
3758 }