git.sesse.net Git - ffmpeg/blob - 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 "libavutil/avstring.h"
  32 #include "libavutil/colorspace.h"
  33 #include "libavutil/mathematics.h"
  34 #include "libavutil/pixdesc.h"
  35 #include "libavutil/imgutils.h"
  36 #include "libavutil/dict.h"
  37 #include "libavutil/parseutils.h"
  38 #include "libavutil/samplefmt.h"
  39 #include "libavutil/avassert.h"
  40 #include "libavutil/time.h"
  41 #include "libavformat/avformat.h"
  42 #include "libavdevice/avdevice.h"
  43 #include "libswscale/swscale.h"
  44 #include "libavutil/opt.h"
  45 #include "libavcodec/avfft.h"
  46 #include "libswresample/swresample.h"
  47
  48 #if CONFIG_AVFILTER
  49 # include "libavfilter/avcodec.h"
  50 # include "libavfilter/avfilter.h"
  51 # include "libavfilter/buffersink.h"
  52 # include "libavfilter/buffersrc.h"
  53 #endif
  54
  55 #include <SDL.h>
  56 #include <SDL_thread.h>
  57
  58 #include "cmdutils.h"
  59
  60 #include <assert.h>
  61
  62 const char program_name[] = "ffplay";
  63 const int program_birth_year = 2003;
  64
  65 #define MAX_QUEUE_SIZE (15 * 1024 * 1024)
  66 #define MIN_FRAMES 5
  67
  68 /* SDL audio buffer size, in samples. Should be small to have precise
  69    A/V sync as SDL does not have hardware buffer fullness info. */
  70 #define SDL_AUDIO_BUFFER_SIZE 1024
  71
  72 /* no AV sync correction is done if below the minimum AV sync threshold */
  73 #define AV_SYNC_THRESHOLD_MIN 0.01
  74 /* AV sync correction is done if above the maximum AV sync threshold */
  75 #define AV_SYNC_THRESHOLD_MAX 0.1
  76 /* If a frame duration is longer than this, it will not be duplicated to compensate AV sync */
  77 #define AV_SYNC_FRAMEDUP_THRESHOLD 0.1
  78 /* no AV correction is done if too big error */
  79 #define AV_NOSYNC_THRESHOLD 10.0
  80
  81 /* maximum audio speed change to get correct sync */
  82 #define SAMPLE_CORRECTION_PERCENT_MAX 10
  83
  84 /* external clock speed adjustment constants for realtime sources based on buffer fullness */
  85 #define EXTERNAL_CLOCK_SPEED_MIN  0.900
  86 #define EXTERNAL_CLOCK_SPEED_MAX  1.010
  87 #define EXTERNAL_CLOCK_SPEED_STEP 0.001
  88
  89 /* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
  90 #define AUDIO_DIFF_AVG_NB   20
  91
  92 /* polls for possible required screen refresh at least this often, should be less than 1/fps */
  93 #define REFRESH_RATE 0.01
  94
  95 /* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
  96 /* TODO: We assume that a decoded and resampled frame fits into this buffer */
  97 #define SAMPLE_ARRAY_SIZE (8 * 65536)
  98
  99 #define CURSOR_HIDE_DELAY 1000000
 100
 101 static int64_t sws_flags = SWS_BICUBIC;
 102
 103 typedef struct MyAVPacketList {
 104     AVPacket pkt;
 105     struct MyAVPacketList *next;
 106     int serial;
 107 } MyAVPacketList;
 108
 109 typedef struct PacketQueue {
 110     MyAVPacketList *first_pkt, *last_pkt;
 111     int nb_packets;
 112     int size;
 113     int abort_request;
 114     int serial;
 115     SDL_mutex *mutex;
 116     SDL_cond *cond;
 117 } PacketQueue;
 118
 119 #define VIDEO_PICTURE_QUEUE_SIZE 3
 120 #define SUBPICTURE_QUEUE_SIZE 4
 121
 122 typedef struct VideoPicture {
 123     double pts;             // presentation timestamp for this picture
 124     int64_t pos;            // byte position in file
 125     SDL_Overlay *bmp;
 126     int width, height; /* source height & width */
 127     int allocated;
 128     int reallocate;
 129     int serial;
 130
 131     AVRational sar;
 132 } VideoPicture;
 133
 134 typedef struct SubPicture {
 135     double pts; /* presentation time stamp for this picture */
 136     AVSubtitle sub;
 137     int serial;
 138 } SubPicture;
 139
 140 typedef struct AudioParams {
 141     int freq;
 142     int channels;
 143     int64_t channel_layout;
 144     enum AVSampleFormat fmt;
 145 } AudioParams;
 146
 147 typedef struct Clock {
 148     double pts;           /* clock base */
 149     double pts_drift;     /* clock base minus time at which we updated the clock */
 150     double last_updated;
 151     double speed;
 152     int serial;           /* clock is based on a packet with this serial */
 153     int paused;
 154     int *queue_serial;    /* pointer to the current packet queue serial, used for obsolete clock detection */
 155 } Clock;
 156
 157 enum {
 158     AV_SYNC_AUDIO_MASTER, /* default choice */
 159     AV_SYNC_VIDEO_MASTER,
 160     AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */
 161 };
 162
 163 typedef struct VideoState {
 164     SDL_Thread *read_tid;
 165     SDL_Thread *video_tid;
 166     AVInputFormat *iformat;
 167     int no_background;
 168     int abort_request;
 169     int force_refresh;
 170     int paused;
 171     int last_paused;
 172     int queue_attachments_req;
 173     int seek_req;
 174     int seek_flags;
 175     int64_t seek_pos;
 176     int64_t seek_rel;
 177     int read_pause_return;
 178     AVFormatContext *ic;
 179     int realtime;
 180     int audio_finished;
 181     int video_finished;
 182
 183     Clock audclk;
 184     Clock vidclk;
 185     Clock extclk;
 186
 187     int audio_stream;
 188
 189     int av_sync_type;
 190
 191     double audio_clock;
 192     int audio_clock_serial;
 193     double audio_diff_cum; /* used for AV difference average computation */
 194     double audio_diff_avg_coef;
 195     double audio_diff_threshold;
 196     int audio_diff_avg_count;
 197     AVStream *audio_st;
 198     PacketQueue audioq;
 199     int audio_hw_buf_size;
 200     uint8_t silence_buf[SDL_AUDIO_BUFFER_SIZE];
 201     uint8_t *audio_buf;
 202     uint8_t *audio_buf1;
 203     unsigned int audio_buf_size; /* in bytes */
 204     unsigned int audio_buf1_size;
 205     int audio_buf_index; /* in bytes */
 206     int audio_write_buf_size;
 207     int audio_buf_frames_pending;
 208     AVPacket audio_pkt_temp;
 209     AVPacket audio_pkt;
 210     int audio_pkt_temp_serial;
 211     int audio_last_serial;
 212     struct AudioParams audio_src;
 213 #if CONFIG_AVFILTER
 214     struct AudioParams audio_filter_src;
 215 #endif
 216     struct AudioParams audio_tgt;
 217     struct SwrContext *swr_ctx;
 218     int frame_drops_early;
 219     int frame_drops_late;
 220     AVFrame *frame;
 221     int64_t audio_frame_next_pts;
 222
 223     enum ShowMode {
 224         SHOW_MODE_NONE = -1, SHOW_MODE_VIDEO = 0, SHOW_MODE_WAVES, SHOW_MODE_RDFT, SHOW_MODE_NB
 225     } show_mode;
 226     int16_t sample_array[SAMPLE_ARRAY_SIZE];
 227     int sample_array_index;
 228     int last_i_start;
 229     RDFTContext *rdft;
 230     int rdft_bits;
 231     FFTSample *rdft_data;
 232     int xpos;
 233     double last_vis_time;
 234
 235     SDL_Thread *subtitle_tid;
 236     int subtitle_stream;
 237     AVStream *subtitle_st;
 238     PacketQueue subtitleq;
 239     SubPicture subpq[SUBPICTURE_QUEUE_SIZE];
 240     int subpq_size, subpq_rindex, subpq_windex;
 241     SDL_mutex *subpq_mutex;
 242     SDL_cond *subpq_cond;
 243
 244     double frame_timer;
 245     double frame_last_pts;
 246     double frame_last_duration;
 247     double frame_last_dropped_pts;
 248     double frame_last_returned_time;
 249     double frame_last_filter_delay;
 250     int64_t frame_last_dropped_pos;
 251     int frame_last_dropped_serial;
 252     int video_stream;
 253     AVStream *video_st;
 254     PacketQueue videoq;
 255     int64_t video_current_pos;      // current displayed file pos
 256     double max_frame_duration;      // maximum duration of a frame - above this, we consider the jump a timestamp discontinuity
 257     VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
 258     int pictq_size, pictq_rindex, pictq_windex;
 259     SDL_mutex *pictq_mutex;
 260     SDL_cond *pictq_cond;
 261 #if !CONFIG_AVFILTER
 262     struct SwsContext *img_convert_ctx;
 263 #endif
 264     SDL_Rect last_display_rect;
 265
 266     char filename[1024];
 267     int width, height, xleft, ytop;
 268     int step;
 269
 270 #if CONFIG_AVFILTER
 271     AVFilterContext *in_video_filter;   // the first filter in the video chain
 272     AVFilterContext *out_video_filter;  // the last filter in the video chain
 273     AVFilterContext *in_audio_filter;   // the first filter in the audio chain
 274     AVFilterContext *out_audio_filter;  // the last filter in the audio chain
 275     AVFilterGraph *agraph;              // audio filter graph
 276 #endif
 277
 278     int last_video_stream, last_audio_stream, last_subtitle_stream;
 279
 280     SDL_cond *continue_read_thread;
 281 } VideoState;
 282
 283 /* options specified by the user */
 284 static AVInputFormat *file_iformat;
 285 static const char *input_filename;
 286 static const char *window_title;
 287 static int fs_screen_width;
 288 static int fs_screen_height;
 289 static int default_width  = 640;
 290 static int default_height = 480;
 291 static int screen_width  = 0;
 292 static int screen_height = 0;
 293 static int audio_disable;
 294 static int video_disable;
 295 static int subtitle_disable;
 296 static int wanted_stream[AVMEDIA_TYPE_NB] = {
 297     [AVMEDIA_TYPE_AUDIO]    = -1,
 298     [AVMEDIA_TYPE_VIDEO]    = -1,
 299     [AVMEDIA_TYPE_SUBTITLE] = -1,
 300 };
 301 static int seek_by_bytes = -1;
 302 static int display_disable;
 303 static int show_status = 1;
 304 static int av_sync_type = AV_SYNC_AUDIO_MASTER;
 305 static int64_t start_time = AV_NOPTS_VALUE;
 306 static int64_t duration = AV_NOPTS_VALUE;
 307 static int workaround_bugs = 1;
 308 static int fast = 0;
 309 static int genpts = 0;
 310 static int lowres = 0;
 311 static int error_concealment = 3;
 312 static int decoder_reorder_pts = -1;
 313 static int autoexit;
 314 static int exit_on_keydown;
 315 static int exit_on_mousedown;
 316 static int loop = 1;
 317 static int framedrop = -1;
 318 static int infinite_buffer = -1;
 319 static enum ShowMode show_mode = SHOW_MODE_NONE;
 320 static const char *audio_codec_name;
 321 static const char *subtitle_codec_name;
 322 static const char *video_codec_name;
 323 double rdftspeed = 0.02;
 324 static int64_t cursor_last_shown;
 325 static int cursor_hidden = 0;
 326 #if CONFIG_AVFILTER
 327 static char *vfilters = NULL;
 328 static char *afilters = NULL;
 329 #endif
 330
 331 /* current context */
 332 static int is_full_screen;
 333 static int64_t audio_callback_time;
 334
 335 static AVPacket flush_pkt;
 336
 337 #define FF_ALLOC_EVENT   (SDL_USEREVENT)
 338 #define FF_QUIT_EVENT    (SDL_USEREVENT + 2)
 339
 340 static SDL_Surface *screen;
 341
 342 static inline
 343 int cmp_audio_fmts(enum AVSampleFormat fmt1, int64_t channel_count1,
 344                    enum AVSampleFormat fmt2, int64_t channel_count2)
 345 {
 346     /* If channel count == 1, planar and non-planar formats are the same */
 347     if (channel_count1 == 1 && channel_count2 == 1)
 348         return av_get_packed_sample_fmt(fmt1) != av_get_packed_sample_fmt(fmt2);
 349     else
 350         return channel_count1 != channel_count2 || fmt1 != fmt2;
 351 }
 352
 353 static inline
 354 int64_t get_valid_channel_layout(int64_t channel_layout, int channels)
 355 {
 356     if (channel_layout && av_get_channel_layout_nb_channels(channel_layout) == channels)
 357         return channel_layout;
 358     else
 359         return 0;
 360 }
 361
 362 static int packet_queue_put(PacketQueue *q, AVPacket *pkt);
 363
 364 static int packet_queue_put_private(PacketQueue *q, AVPacket *pkt)
 365 {
 366     MyAVPacketList *pkt1;
 367
 368     if (q->abort_request)
 369        return -1;
 370
 371     pkt1 = av_malloc(sizeof(MyAVPacketList));
 372     if (!pkt1)
 373         return -1;
 374     pkt1->pkt = *pkt;
 375     pkt1->next = NULL;
 376     if (pkt == &flush_pkt)
 377         q->serial++;
 378     pkt1->serial = q->serial;
 379
 380     if (!q->last_pkt)
 381         q->first_pkt = pkt1;
 382     else
 383         q->last_pkt->next = pkt1;
 384     q->last_pkt = pkt1;
 385     q->nb_packets++;
 386     q->size += pkt1->pkt.size + sizeof(*pkt1);
 387     /* XXX: should duplicate packet data in DV case */
 388     SDL_CondSignal(q->cond);
 389     return 0;
 390 }
 391
 392 static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
 393 {
 394     int ret;
 395
 396     /* duplicate the packet */
 397     if (pkt != &flush_pkt && av_dup_packet(pkt) < 0)
 398         return -1;
 399
 400     SDL_LockMutex(q->mutex);
 401     ret = packet_queue_put_private(q, pkt);
 402     SDL_UnlockMutex(q->mutex);
 403
 404     if (pkt != &flush_pkt && ret < 0)
 405         av_free_packet(pkt);
 406
 407     return ret;
 408 }
 409
 410 /* packet queue handling */
 411 static void packet_queue_init(PacketQueue *q)
 412 {
 413     memset(q, 0, sizeof(PacketQueue));
 414     q->mutex = SDL_CreateMutex();
 415     q->cond = SDL_CreateCond();
 416     q->abort_request = 1;
 417 }
 418
 419 static void packet_queue_flush(PacketQueue *q)
 420 {
 421     MyAVPacketList *pkt, *pkt1;
 422
 423     SDL_LockMutex(q->mutex);
 424     for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
 425         pkt1 = pkt->next;
 426         av_free_packet(&pkt->pkt);
 427         av_freep(&pkt);
 428     }
 429     q->last_pkt = NULL;
 430     q->first_pkt = NULL;
 431     q->nb_packets = 0;
 432     q->size = 0;
 433     SDL_UnlockMutex(q->mutex);
 434 }
 435
 436 static void packet_queue_destroy(PacketQueue *q)
 437 {
 438     packet_queue_flush(q);
 439     SDL_DestroyMutex(q->mutex);
 440     SDL_DestroyCond(q->cond);
 441 }
 442
 443 static void packet_queue_abort(PacketQueue *q)
 444 {
 445     SDL_LockMutex(q->mutex);
 446
 447     q->abort_request = 1;
 448
 449     SDL_CondSignal(q->cond);
 450
 451     SDL_UnlockMutex(q->mutex);
 452 }
 453
 454 static void packet_queue_start(PacketQueue *q)
 455 {
 456     SDL_LockMutex(q->mutex);
 457     q->abort_request = 0;
 458     packet_queue_put_private(q, &flush_pkt);
 459     SDL_UnlockMutex(q->mutex);
 460 }
 461
 462 /* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
 463 static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block, int *serial)
 464 {
 465     MyAVPacketList *pkt1;
 466     int ret;
 467
 468     SDL_LockMutex(q->mutex);
 469
 470     for (;;) {
 471         if (q->abort_request) {
 472             ret = -1;
 473             break;
 474         }
 475
 476         pkt1 = q->first_pkt;
 477         if (pkt1) {
 478             q->first_pkt = pkt1->next;
 479             if (!q->first_pkt)
 480                 q->last_pkt = NULL;
 481             q->nb_packets--;
 482             q->size -= pkt1->pkt.size + sizeof(*pkt1);
 483             *pkt = pkt1->pkt;
 484             if (serial)
 485                 *serial = pkt1->serial;
 486             av_free(pkt1);
 487             ret = 1;
 488             break;
 489         } else if (!block) {
 490             ret = 0;
 491             break;
 492         } else {
 493             SDL_CondWait(q->cond, q->mutex);
 494         }
 495     }
 496     SDL_UnlockMutex(q->mutex);
 497     return ret;
 498 }
 499
 500 static inline void fill_rectangle(SDL_Surface *screen,
 501                                   int x, int y, int w, int h, int color, int update)
 502 {
 503     SDL_Rect rect;
 504     rect.x = x;
 505     rect.y = y;
 506     rect.w = w;
 507     rect.h = h;
 508     SDL_FillRect(screen, &rect, color);
 509     if (update && w > 0 && h > 0)
 510         SDL_UpdateRect(screen, x, y, w, h);
 511 }
 512
 513 /* draw only the border of a rectangle */
 514 static void fill_border(int xleft, int ytop, int width, int height, int x, int y, int w, int h, int color, int update)
 515 {
 516     int w1, w2, h1, h2;
 517
 518     /* fill the background */
 519     w1 = x;
 520     if (w1 < 0)
 521         w1 = 0;
 522     w2 = width - (x + w);
 523     if (w2 < 0)
 524         w2 = 0;
 525     h1 = y;
 526     if (h1 < 0)
 527         h1 = 0;
 528     h2 = height - (y + h);
 529     if (h2 < 0)
 530         h2 = 0;
 531     fill_rectangle(screen,
 532                    xleft, ytop,
 533                    w1, height,
 534                    color, update);
 535     fill_rectangle(screen,
 536                    xleft + width - w2, ytop,
 537                    w2, height,
 538                    color, update);
 539     fill_rectangle(screen,
 540                    xleft + w1, ytop,
 541                    width - w1 - w2, h1,
 542                    color, update);
 543     fill_rectangle(screen,
 544                    xleft + w1, ytop + height - h2,
 545                    width - w1 - w2, h2,
 546                    color, update);
 547 }
 548
 549 #define ALPHA_BLEND(a, oldp, newp, s)\
 550 ((((oldp << s) * (255 - (a))) + (newp * (a))) / (255 << s))
 551
 552 #define RGBA_IN(r, g, b, a, s)\
 553 {\
 554     unsigned int v = ((const uint32_t *)(s))[0];\
 555     a = (v >> 24) & 0xff;\
 556     r = (v >> 16) & 0xff;\
 557     g = (v >> 8) & 0xff;\
 558     b = v & 0xff;\
 559 }
 560
 561 #define YUVA_IN(y, u, v, a, s, pal)\
 562 {\
 563     unsigned int val = ((const uint32_t *)(pal))[*(const uint8_t*)(s)];\
 564     a = (val >> 24) & 0xff;\
 565     y = (val >> 16) & 0xff;\
 566     u = (val >> 8) & 0xff;\
 567     v = val & 0xff;\
 568 }
 569
 570 #define YUVA_OUT(d, y, u, v, a)\
 571 {\
 572     ((uint32_t *)(d))[0] = (a << 24) | (y << 16) | (u << 8) | v;\
 573 }
 574
 575
 576 #define BPP 1
 577
 578 static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw, int imgh)
 579 {
 580     int wrap, wrap3, width2, skip2;
 581     int y, u, v, a, u1, v1, a1, w, h;
 582     uint8_t *lum, *cb, *cr;
 583     const uint8_t *p;
 584     const uint32_t *pal;
 585     int dstx, dsty, dstw, dsth;
 586
 587     dstw = av_clip(rect->w, 0, imgw);
 588     dsth = av_clip(rect->h, 0, imgh);
 589     dstx = av_clip(rect->x, 0, imgw - dstw);
 590     dsty = av_clip(rect->y, 0, imgh - dsth);
 591     lum = dst->data[0] + dsty * dst->linesize[0];
 592     cb  = dst->data[1] + (dsty >> 1) * dst->linesize[1];
 593     cr  = dst->data[2] + (dsty >> 1) * dst->linesize[2];
 594
 595     width2 = ((dstw + 1) >> 1) + (dstx & ~dstw & 1);
 596     skip2 = dstx >> 1;
 597     wrap = dst->linesize[0];
 598     wrap3 = rect->pict.linesize[0];
 599     p = rect->pict.data[0];
 600     pal = (const uint32_t *)rect->pict.data[1];  /* Now in YCrCb! */
 601
 602     if (dsty & 1) {
 603         lum += dstx;
 604         cb += skip2;
 605         cr += skip2;
 606
 607         if (dstx & 1) {
 608             YUVA_IN(y, u, v, a, p, pal);
 609             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 610             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
 611             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
 612             cb++;
 613             cr++;
 614             lum++;
 615             p += BPP;
 616         }
 617         for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
 618             YUVA_IN(y, u, v, a, p, pal);
 619             u1 = u;
 620             v1 = v;
 621             a1 = a;
 622             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 623
 624             YUVA_IN(y, u, v, a, p + BPP, pal);
 625             u1 += u;
 626             v1 += v;
 627             a1 += a;
 628             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
 629             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
 630             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
 631             cb++;
 632             cr++;
 633             p += 2 * BPP;
 634             lum += 2;
 635         }
 636         if (w) {
 637             YUVA_IN(y, u, v, a, p, pal);
 638             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 639             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
 640             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
 641             p++;
 642             lum++;
 643         }
 644         p += wrap3 - dstw * BPP;
 645         lum += wrap - dstw - dstx;
 646         cb += dst->linesize[1] - width2 - skip2;
 647         cr += dst->linesize[2] - width2 - skip2;
 648     }
 649     for (h = dsth - (dsty & 1); h >= 2; h -= 2) {
 650         lum += dstx;
 651         cb += skip2;
 652         cr += skip2;
 653
 654         if (dstx & 1) {
 655             YUVA_IN(y, u, v, a, p, pal);
 656             u1 = u;
 657             v1 = v;
 658             a1 = a;
 659             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 660             p += wrap3;
 661             lum += wrap;
 662             YUVA_IN(y, u, v, a, p, pal);
 663             u1 += u;
 664             v1 += v;
 665             a1 += a;
 666             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 667             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
 668             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
 669             cb++;
 670             cr++;
 671             p += -wrap3 + BPP;
 672             lum += -wrap + 1;
 673         }
 674         for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
 675             YUVA_IN(y, u, v, a, p, pal);
 676             u1 = u;
 677             v1 = v;
 678             a1 = a;
 679             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 680
 681             YUVA_IN(y, u, v, a, p + BPP, pal);
 682             u1 += u;
 683             v1 += v;
 684             a1 += a;
 685             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
 686             p += wrap3;
 687             lum += wrap;
 688
 689             YUVA_IN(y, u, v, a, p, pal);
 690             u1 += u;
 691             v1 += v;
 692             a1 += a;
 693             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 694
 695             YUVA_IN(y, u, v, a, p + BPP, pal);
 696             u1 += u;
 697             v1 += v;
 698             a1 += a;
 699             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
 700
 701             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 2);
 702             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 2);
 703
 704             cb++;
 705             cr++;
 706             p += -wrap3 + 2 * BPP;
 707             lum += -wrap + 2;
 708         }
 709         if (w) {
 710             YUVA_IN(y, u, v, a, p, pal);
 711             u1 = u;
 712             v1 = v;
 713             a1 = a;
 714             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 715             p += wrap3;
 716             lum += wrap;
 717             YUVA_IN(y, u, v, a, p, pal);
 718             u1 += u;
 719             v1 += v;
 720             a1 += a;
 721             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 722             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
 723             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
 724             cb++;
 725             cr++;
 726             p += -wrap3 + BPP;
 727             lum += -wrap + 1;
 728         }
 729         p += wrap3 + (wrap3 - dstw * BPP);
 730         lum += wrap + (wrap - dstw - dstx);
 731         cb += dst->linesize[1] - width2 - skip2;
 732         cr += dst->linesize[2] - width2 - skip2;
 733     }
 734     /* handle odd height */
 735     if (h) {
 736         lum += dstx;
 737         cb += skip2;
 738         cr += skip2;
 739
 740         if (dstx & 1) {
 741             YUVA_IN(y, u, v, a, p, pal);
 742             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 743             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
 744             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
 745             cb++;
 746             cr++;
 747             lum++;
 748             p += BPP;
 749         }
 750         for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
 751             YUVA_IN(y, u, v, a, p, pal);
 752             u1 = u;
 753             v1 = v;
 754             a1 = a;
 755             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 756
 757             YUVA_IN(y, u, v, a, p + BPP, pal);
 758             u1 += u;
 759             v1 += v;
 760             a1 += a;
 761             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
 762             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u, 1);
 763             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v, 1);
 764             cb++;
 765             cr++;
 766             p += 2 * BPP;
 767             lum += 2;
 768         }
 769         if (w) {
 770             YUVA_IN(y, u, v, a, p, pal);
 771             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 772             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
 773             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
 774         }
 775     }
 776 }
 777
 778 static void free_subpicture(SubPicture *sp)
 779 {
 780     avsubtitle_free(&sp->sub);
 781 }
 782
 783 static void calculate_display_rect(SDL_Rect *rect, int scr_xleft, int scr_ytop, int scr_width, int scr_height, VideoPicture *vp)
 784 {
 785     float aspect_ratio;
 786     int width, height, x, y;
 787
 788     if (vp->sar.num == 0)
 789         aspect_ratio = 0;
 790     else
 791         aspect_ratio = av_q2d(vp->sar);
 792
 793     if (aspect_ratio <= 0.0)
 794         aspect_ratio = 1.0;
 795     aspect_ratio *= (float)vp->width / (float)vp->height;
 796
 797     /* XXX: we suppose the screen has a 1.0 pixel ratio */
 798     height = scr_height;
 799     width = ((int)rint(height * aspect_ratio)) & ~1;
 800     if (width > scr_width) {
 801         width = scr_width;
 802         height = ((int)rint(width / aspect_ratio)) & ~1;
 803     }
 804     x = (scr_width - width) / 2;
 805     y = (scr_height - height) / 2;
 806     rect->x = scr_xleft + x;
 807     rect->y = scr_ytop  + y;
 808     rect->w = FFMAX(width,  1);
 809     rect->h = FFMAX(height, 1);
 810 }
 811
 812 static void video_image_display(VideoState *is)
 813 {
 814     VideoPicture *vp;
 815     SubPicture *sp;
 816     AVPicture pict;
 817     SDL_Rect rect;
 818     int i;
 819
 820     vp = &is->pictq[is->pictq_rindex];
 821     if (vp->bmp) {
 822         if (is->subtitle_st) {
 823             if (is->subpq_size > 0) {
 824                 sp = &is->subpq[is->subpq_rindex];
 825
 826                 if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000)) {
 827                     SDL_LockYUVOverlay (vp->bmp);
 828
 829                     pict.data[0] = vp->bmp->pixels[0];
 830                     pict.data[1] = vp->bmp->pixels[2];
 831                     pict.data[2] = vp->bmp->pixels[1];
 832
 833                     pict.linesize[0] = vp->bmp->pitches[0];
 834                     pict.linesize[1] = vp->bmp->pitches[2];
 835                     pict.linesize[2] = vp->bmp->pitches[1];
 836
 837                     for (i = 0; i < sp->sub.num_rects; i++)
 838                         blend_subrect(&pict, sp->sub.rects[i],
 839                                       vp->bmp->w, vp->bmp->h);
 840
 841                     SDL_UnlockYUVOverlay (vp->bmp);
 842                 }
 843             }
 844         }
 845
 846         calculate_display_rect(&rect, is->xleft, is->ytop, is->width, is->height, vp);
 847
 848         SDL_DisplayYUVOverlay(vp->bmp, &rect);
 849
 850         if (rect.x != is->last_display_rect.x || rect.y != is->last_display_rect.y || rect.w != is->last_display_rect.w || rect.h != is->last_display_rect.h || is->force_refresh) {
 851             int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
 852             fill_border(is->xleft, is->ytop, is->width, is->height, rect.x, rect.y, rect.w, rect.h, bgcolor, 1);
 853             is->last_display_rect = rect;
 854         }
 855     }
 856 }
 857
 858 static inline int compute_mod(int a, int b)
 859 {
 860     return a < 0 ? a%b + b : a%b;
 861 }
 862
 863 static void video_audio_display(VideoState *s)
 864 {
 865     int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
 866     int ch, channels, h, h2, bgcolor, fgcolor;
 867     int64_t time_diff;
 868     int rdft_bits, nb_freq;
 869
 870     for (rdft_bits = 1; (1 << rdft_bits) < 2 * s->height; rdft_bits++)
 871         ;
 872     nb_freq = 1 << (rdft_bits - 1);
 873
 874     /* compute display index : center on currently output samples */
 875     channels = s->audio_tgt.channels;
 876     nb_display_channels = channels;
 877     if (!s->paused) {
 878         int data_used= s->show_mode == SHOW_MODE_WAVES ? s->width : (2*nb_freq);
 879         n = 2 * channels;
 880         delay = s->audio_write_buf_size;
 881         delay /= n;
 882
 883         /* to be more precise, we take into account the time spent since
 884            the last buffer computation */
 885         if (audio_callback_time) {
 886             time_diff = av_gettime() - audio_callback_time;
 887             delay -= (time_diff * s->audio_tgt.freq) / 1000000;
 888         }
 889
 890         delay += 2 * data_used;
 891         if (delay < data_used)
 892             delay = data_used;
 893
 894         i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
 895         if (s->show_mode == SHOW_MODE_WAVES) {
 896             h = INT_MIN;
 897             for (i = 0; i < 1000; i += channels) {
 898                 int idx = (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
 899                 int a = s->sample_array[idx];
 900                 int b = s->sample_array[(idx + 4 * channels) % SAMPLE_ARRAY_SIZE];
 901                 int c = s->sample_array[(idx + 5 * channels) % SAMPLE_ARRAY_SIZE];
 902                 int d = s->sample_array[(idx + 9 * channels) % SAMPLE_ARRAY_SIZE];
 903                 int score = a - d;
 904                 if (h < score && (b ^ c) < 0) {
 905                     h = score;
 906                     i_start = idx;
 907                 }
 908             }
 909         }
 910
 911         s->last_i_start = i_start;
 912     } else {
 913         i_start = s->last_i_start;
 914     }
 915
 916     bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
 917     if (s->show_mode == SHOW_MODE_WAVES) {
 918         fill_rectangle(screen,
 919                        s->xleft, s->ytop, s->width, s->height,
 920                        bgcolor, 0);
 921
 922         fgcolor = SDL_MapRGB(screen->format, 0xff, 0xff, 0xff);
 923
 924         /* total height for one channel */
 925         h = s->height / nb_display_channels;
 926         /* graph height / 2 */
 927         h2 = (h * 9) / 20;
 928         for (ch = 0; ch < nb_display_channels; ch++) {
 929             i = i_start + ch;
 930             y1 = s->ytop + ch * h + (h / 2); /* position of center line */
 931             for (x = 0; x < s->width; x++) {
 932                 y = (s->sample_array[i] * h2) >> 15;
 933                 if (y < 0) {
 934                     y = -y;
 935                     ys = y1 - y;
 936                 } else {
 937                     ys = y1;
 938                 }
 939                 fill_rectangle(screen,
 940                                s->xleft + x, ys, 1, y,
 941                                fgcolor, 0);
 942                 i += channels;
 943                 if (i >= SAMPLE_ARRAY_SIZE)
 944                     i -= SAMPLE_ARRAY_SIZE;
 945             }
 946         }
 947
 948         fgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0xff);
 949
 950         for (ch = 1; ch < nb_display_channels; ch++) {
 951             y = s->ytop + ch * h;
 952             fill_rectangle(screen,
 953                            s->xleft, y, s->width, 1,
 954                            fgcolor, 0);
 955         }
 956         SDL_UpdateRect(screen, s->xleft, s->ytop, s->width, s->height);
 957     } else {
 958         nb_display_channels= FFMIN(nb_display_channels, 2);
 959         if (rdft_bits != s->rdft_bits) {
 960             av_rdft_end(s->rdft);
 961             av_free(s->rdft_data);
 962             s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
 963             s->rdft_bits = rdft_bits;
 964             s->rdft_data = av_malloc(4 * nb_freq * sizeof(*s->rdft_data));
 965         }
 966         {
 967             FFTSample *data[2];
 968             for (ch = 0; ch < nb_display_channels; ch++) {
 969                 data[ch] = s->rdft_data + 2 * nb_freq * ch;
 970                 i = i_start + ch;
 971                 for (x = 0; x < 2 * nb_freq; x++) {
 972                     double w = (x-nb_freq) * (1.0 / nb_freq);
 973                     data[ch][x] = s->sample_array[i] * (1.0 - w * w);
 974                     i += channels;
 975                     if (i >= SAMPLE_ARRAY_SIZE)
 976                         i -= SAMPLE_ARRAY_SIZE;
 977                 }
 978                 av_rdft_calc(s->rdft, data[ch]);
 979             }
 980             /* Least efficient way to do this, we should of course
 981              * directly access it but it is more than fast enough. */
 982             for (y = 0; y < s->height; y++) {
 983                 double w = 1 / sqrt(nb_freq);
 984                 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]));
 985                 int b = (nb_display_channels == 2 ) ? sqrt(w * sqrt(data[1][2 * y + 0] * data[1][2 * y + 0]
 986                        + data[1][2 * y + 1] * data[1][2 * y + 1])) : a;
 987                 a = FFMIN(a, 255);
 988                 b = FFMIN(b, 255);
 989                 fgcolor = SDL_MapRGB(screen->format, a, b, (a + b) / 2);
 990
 991                 fill_rectangle(screen,
 992                             s->xpos, s->height-y, 1, 1,
 993                             fgcolor, 0);
 994             }
 995         }
 996         SDL_UpdateRect(screen, s->xpos, s->ytop, 1, s->height);
 997         if (!s->paused)
 998             s->xpos++;
 999         if (s->xpos >= s->width)
1000             s->xpos= s->xleft;
1001     }
1002 }
1003
1004 static void stream_close(VideoState *is)
1005 {
1006     VideoPicture *vp;
1007     int i;
1008     /* XXX: use a special url_shutdown call to abort parse cleanly */
1009     is->abort_request = 1;
1010     SDL_WaitThread(is->read_tid, NULL);
1011     packet_queue_destroy(&is->videoq);
1012     packet_queue_destroy(&is->audioq);
1013     packet_queue_destroy(&is->subtitleq);
1014
1015     /* free all pictures */
1016     for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++) {
1017         vp = &is->pictq[i];
1018         if (vp->bmp) {
1019             SDL_FreeYUVOverlay(vp->bmp);
1020             vp->bmp = NULL;
1021         }
1022     }
1023     for (i = 0; i < SUBPICTURE_QUEUE_SIZE; i++)
1024         free_subpicture(&is->subpq[i]);
1025     SDL_DestroyMutex(is->pictq_mutex);
1026     SDL_DestroyCond(is->pictq_cond);
1027     SDL_DestroyMutex(is->subpq_mutex);
1028     SDL_DestroyCond(is->subpq_cond);
1029     SDL_DestroyCond(is->continue_read_thread);
1030 #if !CONFIG_AVFILTER
1031     sws_freeContext(is->img_convert_ctx);
1032 #endif
1033     av_free(is);
1034 }
1035
1036 static void do_exit(VideoState *is)
1037 {
1038     if (is) {
1039         stream_close(is);
1040     }
1041     av_lockmgr_register(NULL);
1042     uninit_opts();
1043 #if CONFIG_AVFILTER
1044     av_freep(&vfilters);
1045 #endif
1046     avformat_network_deinit();
1047     if (show_status)
1048         printf("\n");
1049     SDL_Quit();
1050     av_log(NULL, AV_LOG_QUIET, "%s", "");
1051     exit(0);
1052 }
1053
1054 static void sigterm_handler(int sig)
1055 {
1056     exit(123);
1057 }
1058
1059 static int video_open(VideoState *is, int force_set_video_mode, VideoPicture *vp)
1060 {
1061     int flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
1062     int w,h;
1063     SDL_Rect rect;
1064
1065     if (is_full_screen) flags |= SDL_FULLSCREEN;
1066     else                flags |= SDL_RESIZABLE;
1067
1068     if (vp && vp->width) {
1069         calculate_display_rect(&rect, 0, 0, INT_MAX, vp->height, vp);
1070         default_width  = rect.w;
1071         default_height = rect.h;
1072     }
1073
1074     if (is_full_screen && fs_screen_width) {
1075         w = fs_screen_width;
1076         h = fs_screen_height;
1077     } else if (!is_full_screen && screen_width) {
1078         w = screen_width;
1079         h = screen_height;
1080     } else {
1081         w = default_width;
1082         h = default_height;
1083     }
1084     w = FFMIN(16383, w);
1085     if (screen && is->width == screen->w && screen->w == w
1086        && is->height== screen->h && screen->h == h && !force_set_video_mode)
1087         return 0;
1088     screen = SDL_SetVideoMode(w, h, 0, flags);
1089     if (!screen) {
1090         av_log(NULL, AV_LOG_FATAL, "SDL: could not set video mode - exiting\n");
1091         do_exit(is);
1092     }
1093     if (!window_title)
1094         window_title = input_filename;
1095     SDL_WM_SetCaption(window_title, window_title);
1096
1097     is->width  = screen->w;
1098     is->height = screen->h;
1099
1100     return 0;
1101 }
1102
1103 /* display the current picture, if any */
1104 static void video_display(VideoState *is)
1105 {
1106     if (!screen)
1107         video_open(is, 0, NULL);
1108     if (is->audio_st && is->show_mode != SHOW_MODE_VIDEO)
1109         video_audio_display(is);
1110     else if (is->video_st)
1111         video_image_display(is);
1112 }
1113
1114 static double get_clock(Clock *c)
1115 {
1116     if (*c->queue_serial != c->serial)
1117         return NAN;
1118     if (c->paused) {
1119         return c->pts;
1120     } else {
1121         double time = av_gettime() / 1000000.0;
1122         return c->pts_drift + time - (time - c->last_updated) * (1.0 - c->speed);
1123     }
1124 }
1125
1126 static void set_clock_at(Clock *c, double pts, int serial, double time)
1127 {
1128     c->pts = pts;
1129     c->last_updated = time;
1130     c->pts_drift = c->pts - time;
1131     c->serial = serial;
1132 }
1133
1134 static void set_clock(Clock *c, double pts, int serial)
1135 {
1136     double time = av_gettime() / 1000000.0;
1137     set_clock_at(c, pts, serial, time);
1138 }
1139
1140 static void set_clock_speed(Clock *c, double speed)
1141 {
1142     set_clock(c, get_clock(c), c->serial);
1143     c->speed = speed;
1144 }
1145
1146 static void init_clock(Clock *c, int *queue_serial)
1147 {
1148     c->speed = 1.0;
1149     c->paused = 0;
1150     c->queue_serial = queue_serial;
1151     set_clock(c, NAN, -1);
1152 }
1153
1154 static void sync_clock_to_slave(Clock *c, Clock *slave)
1155 {
1156     double clock = get_clock(c);
1157     double slave_clock = get_clock(slave);
1158     if (!isnan(slave_clock) && (isnan(clock) || fabs(clock - slave_clock) > AV_NOSYNC_THRESHOLD))
1159         set_clock(c, slave_clock, slave->serial);
1160 }
1161
1162 static int get_master_sync_type(VideoState *is) {
1163     if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
1164         if (is->video_st)
1165             return AV_SYNC_VIDEO_MASTER;
1166         else
1167             return AV_SYNC_AUDIO_MASTER;
1168     } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
1169         if (is->audio_st)
1170             return AV_SYNC_AUDIO_MASTER;
1171         else
1172             return AV_SYNC_EXTERNAL_CLOCK;
1173     } else {
1174         return AV_SYNC_EXTERNAL_CLOCK;
1175     }
1176 }
1177
1178 /* get the current master clock value */
1179 static double get_master_clock(VideoState *is)
1180 {
1181     double val;
1182
1183     switch (get_master_sync_type(is)) {
1184         case AV_SYNC_VIDEO_MASTER:
1185             val = get_clock(&is->vidclk);
1186             break;
1187         case AV_SYNC_AUDIO_MASTER:
1188             val = get_clock(&is->audclk);
1189             break;
1190         default:
1191             val = get_clock(&is->extclk);
1192             break;
1193     }
1194     return val;
1195 }
1196
1197 static void check_external_clock_speed(VideoState *is) {
1198    if (is->video_stream >= 0 && is->videoq.nb_packets <= MIN_FRAMES / 2 ||
1199        is->audio_stream >= 0 && is->audioq.nb_packets <= MIN_FRAMES / 2) {
1200        set_clock_speed(&is->extclk, FFMAX(EXTERNAL_CLOCK_SPEED_MIN, is->extclk.speed - EXTERNAL_CLOCK_SPEED_STEP));
1201    } else if ((is->video_stream < 0 || is->videoq.nb_packets > MIN_FRAMES * 2) &&
1202               (is->audio_stream < 0 || is->audioq.nb_packets > MIN_FRAMES * 2)) {
1203        set_clock_speed(&is->extclk, FFMIN(EXTERNAL_CLOCK_SPEED_MAX, is->extclk.speed + EXTERNAL_CLOCK_SPEED_STEP));
1204    } else {
1205        double speed = is->extclk.speed;
1206        if (speed != 1.0)
1207            set_clock_speed(&is->extclk, speed + EXTERNAL_CLOCK_SPEED_STEP * (1.0 - speed) / fabs(1.0 - speed));
1208    }
1209 }
1210
1211 /* seek in the stream */
1212 static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_bytes)
1213 {
1214     if (!is->seek_req) {
1215         is->seek_pos = pos;
1216         is->seek_rel = rel;
1217         is->seek_flags &= ~AVSEEK_FLAG_BYTE;
1218         if (seek_by_bytes)
1219             is->seek_flags |= AVSEEK_FLAG_BYTE;
1220         is->seek_req = 1;
1221         SDL_CondSignal(is->continue_read_thread);
1222     }
1223 }
1224
1225 /* pause or resume the video */
1226 static void stream_toggle_pause(VideoState *is)
1227 {
1228     if (is->paused) {
1229         is->frame_timer += av_gettime() / 1000000.0 + is->vidclk.pts_drift - is->vidclk.pts;
1230         if (is->read_pause_return != AVERROR(ENOSYS)) {
1231             is->vidclk.paused = 0;
1232         }
1233         set_clock(&is->vidclk, get_clock(&is->vidclk), is->vidclk.serial);
1234     }
1235     set_clock(&is->extclk, get_clock(&is->extclk), is->extclk.serial);
1236     is->paused = is->audclk.paused = is->vidclk.paused = is->extclk.paused = !is->paused;
1237 }
1238
1239 static void toggle_pause(VideoState *is)
1240 {
1241     stream_toggle_pause(is);
1242     is->step = 0;
1243 }
1244
1245 static void step_to_next_frame(VideoState *is)
1246 {
1247     /* if the stream is paused unpause it, then step */
1248     if (is->paused)
1249         stream_toggle_pause(is);
1250     is->step = 1;
1251 }
1252
1253 static double compute_target_delay(double delay, VideoState *is)
1254 {
1255     double sync_threshold, diff;
1256
1257     /* update delay to follow master synchronisation source */
1258     if (get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER) {
1259         /* if video is slave, we try to correct big delays by
1260            duplicating or deleting a frame */
1261         diff = get_clock(&is->vidclk) - get_master_clock(is);
1262
1263         /* skip or repeat frame. We take into account the
1264            delay to compute the threshold. I still don't know
1265            if it is the best guess */
1266         sync_threshold = FFMAX(AV_SYNC_THRESHOLD_MIN, FFMIN(AV_SYNC_THRESHOLD_MAX, delay));
1267         if (!isnan(diff) && fabs(diff) < is->max_frame_duration) {
1268             if (diff <= -sync_threshold)
1269                 delay = FFMAX(0, delay + diff);
1270             else if (diff >= sync_threshold && delay > AV_SYNC_FRAMEDUP_THRESHOLD)
1271                 delay = delay + diff;
1272             else if (diff >= sync_threshold)
1273                 delay = 2 * delay;
1274         }
1275     }
1276
1277     av_dlog(NULL, "video: delay=%0.3f A-V=%f\n",
1278             delay, -diff);
1279
1280     return delay;
1281 }
1282
1283 static void pictq_next_picture(VideoState *is) {
1284     /* update queue size and signal for next picture */
1285     if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
1286         is->pictq_rindex = 0;
1287
1288     SDL_LockMutex(is->pictq_mutex);
1289     is->pictq_size--;
1290     SDL_CondSignal(is->pictq_cond);
1291     SDL_UnlockMutex(is->pictq_mutex);
1292 }
1293
1294 static int pictq_prev_picture(VideoState *is) {
1295     VideoPicture *prevvp;
1296     int ret = 0;
1297     /* update queue size and signal for the previous picture */
1298     prevvp = &is->pictq[(is->pictq_rindex + VIDEO_PICTURE_QUEUE_SIZE - 1) % VIDEO_PICTURE_QUEUE_SIZE];
1299     if (prevvp->allocated && prevvp->serial == is->videoq.serial) {
1300         SDL_LockMutex(is->pictq_mutex);
1301         if (is->pictq_size < VIDEO_PICTURE_QUEUE_SIZE) {
1302             if (--is->pictq_rindex == -1)
1303                 is->pictq_rindex = VIDEO_PICTURE_QUEUE_SIZE - 1;
1304             is->pictq_size++;
1305             ret = 1;
1306         }
1307         SDL_CondSignal(is->pictq_cond);
1308         SDL_UnlockMutex(is->pictq_mutex);
1309     }
1310     return ret;
1311 }
1312
1313 static void update_video_pts(VideoState *is, double pts, int64_t pos, int serial) {
1314     /* update current video pts */
1315     set_clock(&is->vidclk, pts, serial);
1316     sync_clock_to_slave(&is->extclk, &is->vidclk);
1317     is->video_current_pos = pos;
1318     is->frame_last_pts = pts;
1319 }
1320
1321 /* called to display each frame */
1322 static void video_refresh(void *opaque, double *remaining_time)
1323 {
1324     VideoState *is = opaque;
1325     VideoPicture *vp;
1326     double time;
1327
1328     SubPicture *sp, *sp2;
1329
1330     if (!is->paused && get_master_sync_type(is) == AV_SYNC_EXTERNAL_CLOCK && is->realtime)
1331         check_external_clock_speed(is);
1332
1333     if (!display_disable && is->show_mode != SHOW_MODE_VIDEO && is->audio_st) {
1334         time = av_gettime() / 1000000.0;
1335         if (is->force_refresh || is->last_vis_time + rdftspeed < time) {
1336             video_display(is);
1337             is->last_vis_time = time;
1338         }
1339         *remaining_time = FFMIN(*remaining_time, is->last_vis_time + rdftspeed - time);
1340     }
1341
1342     if (is->video_st) {
1343         int redisplay = 0;
1344         if (is->force_refresh)
1345             redisplay = pictq_prev_picture(is);
1346 retry:
1347         if (is->pictq_size == 0) {
1348             SDL_LockMutex(is->pictq_mutex);
1349             if (is->frame_last_dropped_pts != AV_NOPTS_VALUE && is->frame_last_dropped_pts > is->frame_last_pts) {
1350                 update_video_pts(is, is->frame_last_dropped_pts, is->frame_last_dropped_pos, is->frame_last_dropped_serial);
1351                 is->frame_last_dropped_pts = AV_NOPTS_VALUE;
1352             }
1353             SDL_UnlockMutex(is->pictq_mutex);
1354             // nothing to do, no picture to display in the queue
1355         } else {
1356             double last_duration, duration, delay;
1357             /* dequeue the picture */
1358             vp = &is->pictq[is->pictq_rindex];
1359
1360             if (vp->serial != is->videoq.serial) {
1361                 pictq_next_picture(is);
1362                 redisplay = 0;
1363                 goto retry;
1364             }
1365
1366             if (is->paused)
1367                 goto display;
1368
1369             /* compute nominal last_duration */
1370             last_duration = vp->pts - is->frame_last_pts;
1371             if (!isnan(last_duration) && last_duration > 0 && last_duration < is->max_frame_duration) {
1372                 /* if duration of the last frame was sane, update last_duration in video state */
1373                 is->frame_last_duration = last_duration;
1374             }
1375             if (redisplay)
1376                 delay = 0.0;
1377             else
1378                 delay = compute_target_delay(is->frame_last_duration, is);
1379
1380             time= av_gettime()/1000000.0;
1381             if (time < is->frame_timer + delay && !redisplay) {
1382                 *remaining_time = FFMIN(is->frame_timer + delay - time, *remaining_time);
1383                 return;
1384             }
1385
1386             is->frame_timer += delay;
1387             if (delay > 0 && time - is->frame_timer > AV_SYNC_THRESHOLD_MAX)
1388                 is->frame_timer = time;
1389
1390             SDL_LockMutex(is->pictq_mutex);
1391             if (!redisplay && !isnan(vp->pts))
1392                 update_video_pts(is, vp->pts, vp->pos, vp->serial);
1393             SDL_UnlockMutex(is->pictq_mutex);
1394
1395             if (is->pictq_size > 1) {
1396                 VideoPicture *nextvp = &is->pictq[(is->pictq_rindex + 1) % VIDEO_PICTURE_QUEUE_SIZE];
1397                 duration = nextvp->pts - vp->pts;
1398                 if(!is->step && (redisplay || framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) && time > is->frame_timer + duration){
1399                     if (!redisplay)
1400                         is->frame_drops_late++;
1401                     pictq_next_picture(is);
1402                     redisplay = 0;
1403                     goto retry;
1404                 }
1405             }
1406
1407             if (is->subtitle_st) {
1408                     while (is->subpq_size > 0) {
1409                         sp = &is->subpq[is->subpq_rindex];
1410
1411                         if (is->subpq_size > 1)
1412                             sp2 = &is->subpq[(is->subpq_rindex + 1) % SUBPICTURE_QUEUE_SIZE];
1413                         else
1414                             sp2 = NULL;
1415
1416                         if (sp->serial != is->subtitleq.serial
1417                                 || (is->vidclk.pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
1418                                 || (sp2 && is->vidclk.pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
1419                         {
1420                             free_subpicture(sp);
1421
1422                             /* update queue size and signal for next picture */
1423                             if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
1424                                 is->subpq_rindex = 0;
1425
1426                             SDL_LockMutex(is->subpq_mutex);
1427                             is->subpq_size--;
1428                             SDL_CondSignal(is->subpq_cond);
1429                             SDL_UnlockMutex(is->subpq_mutex);
1430                         } else {
1431                             break;
1432                         }
1433                     }
1434             }
1435
1436 display:
1437             /* display picture */
1438             if (!display_disable && is->show_mode == SHOW_MODE_VIDEO)
1439                 video_display(is);
1440
1441             pictq_next_picture(is);
1442
1443             if (is->step && !is->paused)
1444                 stream_toggle_pause(is);
1445         }
1446     }
1447     is->force_refresh = 0;
1448     if (show_status) {
1449         static int64_t last_time;
1450         int64_t cur_time;
1451         int aqsize, vqsize, sqsize;
1452         double av_diff;
1453
1454         cur_time = av_gettime();
1455         if (!last_time || (cur_time - last_time) >= 30000) {
1456             aqsize = 0;
1457             vqsize = 0;
1458             sqsize = 0;
1459             if (is->audio_st)
1460                 aqsize = is->audioq.size;
1461             if (is->video_st)
1462                 vqsize = is->videoq.size;
1463             if (is->subtitle_st)
1464                 sqsize = is->subtitleq.size;
1465             av_diff = 0;
1466             if (is->audio_st && is->video_st)
1467                 av_diff = get_clock(&is->audclk) - get_clock(&is->vidclk);
1468             else if (is->video_st)
1469                 av_diff = get_master_clock(is) - get_clock(&is->vidclk);
1470             else if (is->audio_st)
1471                 av_diff = get_master_clock(is) - get_clock(&is->audclk);
1472             av_log(NULL, AV_LOG_INFO,
1473                    "%7.2f %s:%7.3f fd=%4d aq=%5dKB vq=%5dKB sq=%5dB f=%"PRId64"/%"PRId64"   \r",
1474                    get_master_clock(is),
1475                    (is->audio_st && is->video_st) ? "A-V" : (is->video_st ? "M-V" : (is->audio_st ? "M-A" : "   ")),
1476                    av_diff,
1477                    is->frame_drops_early + is->frame_drops_late,
1478                    aqsize / 1024,
1479                    vqsize / 1024,
1480                    sqsize,
1481                    is->video_st ? is->video_st->codec->pts_correction_num_faulty_dts : 0,
1482                    is->video_st ? is->video_st->codec->pts_correction_num_faulty_pts : 0);
1483             fflush(stdout);
1484             last_time = cur_time;
1485         }
1486     }
1487 }
1488
1489 /* allocate a picture (needs to do that in main thread to avoid
1490    potential locking problems */
1491 static void alloc_picture(VideoState *is)
1492 {
1493     VideoPicture *vp;
1494     int64_t bufferdiff;
1495
1496     vp = &is->pictq[is->pictq_windex];
1497
1498     if (vp->bmp)
1499         SDL_FreeYUVOverlay(vp->bmp);
1500
1501     video_open(is, 0, vp);
1502
1503     vp->bmp = SDL_CreateYUVOverlay(vp->width, vp->height,
1504                                    SDL_YV12_OVERLAY,
1505                                    screen);
1506     bufferdiff = vp->bmp ? FFMAX(vp->bmp->pixels[0], vp->bmp->pixels[1]) - FFMIN(vp->bmp->pixels[0], vp->bmp->pixels[1]) : 0;
1507     if (!vp->bmp || vp->bmp->pitches[0] < vp->width || bufferdiff < (int64_t)vp->height * vp->bmp->pitches[0]) {
1508         /* SDL allocates a buffer smaller than requested if the video
1509          * overlay hardware is unable to support the requested size. */
1510         av_log(NULL, AV_LOG_FATAL,
1511                "Error: the video system does not support an image\n"
1512                         "size of %dx%d pixels. Try using -lowres or -vf \"scale=w:h\"\n"
1513                         "to reduce the image size.\n", vp->width, vp->height );
1514         do_exit(is);
1515     }
1516
1517     SDL_LockMutex(is->pictq_mutex);
1518     vp->allocated = 1;
1519     SDL_CondSignal(is->pictq_cond);
1520     SDL_UnlockMutex(is->pictq_mutex);
1521 }
1522
1523 static void duplicate_right_border_pixels(SDL_Overlay *bmp) {
1524     int i, width, height;
1525     Uint8 *p, *maxp;
1526     for (i = 0; i < 3; i++) {
1527         width  = bmp->w;
1528         height = bmp->h;
1529         if (i > 0) {
1530             width  >>= 1;
1531             height >>= 1;
1532         }
1533         if (bmp->pitches[i] > width) {
1534             maxp = bmp->pixels[i] + bmp->pitches[i] * height - 1;
1535             for (p = bmp->pixels[i] + width - 1; p < maxp; p += bmp->pitches[i])
1536                 *(p+1) = *p;
1537         }
1538     }
1539 }
1540
1541 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts, int64_t pos, int serial)
1542 {
1543     VideoPicture *vp;
1544
1545 #if defined(DEBUG_SYNC) && 0
1546     printf("frame_type=%c pts=%0.3f\n",
1547            av_get_picture_type_char(src_frame->pict_type), pts);
1548 #endif
1549
1550     /* wait until we have space to put a new picture */
1551     SDL_LockMutex(is->pictq_mutex);
1552
1553     /* keep the last already displayed picture in the queue */
1554     while (is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE - 1 &&
1555            !is->videoq.abort_request) {
1556         SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1557     }
1558     SDL_UnlockMutex(is->pictq_mutex);
1559
1560     if (is->videoq.abort_request)
1561         return -1;
1562
1563     vp = &is->pictq[is->pictq_windex];
1564
1565     vp->sar = src_frame->sample_aspect_ratio;
1566
1567     /* alloc or resize hardware picture buffer */
1568     if (!vp->bmp || vp->reallocate || !vp->allocated ||
1569         vp->width  != src_frame->width ||
1570         vp->height != src_frame->height) {
1571         SDL_Event event;
1572
1573         vp->allocated  = 0;
1574         vp->reallocate = 0;
1575         vp->width = src_frame->width;
1576         vp->height = src_frame->height;
1577
1578         /* the allocation must be done in the main thread to avoid
1579            locking problems. */
1580         event.type = FF_ALLOC_EVENT;
1581         event.user.data1 = is;
1582         SDL_PushEvent(&event);
1583
1584         /* wait until the picture is allocated */
1585         SDL_LockMutex(is->pictq_mutex);
1586         while (!vp->allocated && !is->videoq.abort_request) {
1587             SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1588         }
1589         /* if the queue is aborted, we have to pop the pending ALLOC event or wait for the allocation to complete */
1590         if (is->videoq.abort_request && SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_EVENTMASK(FF_ALLOC_EVENT)) != 1) {
1591             while (!vp->allocated) {
1592                 SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1593             }
1594         }
1595         SDL_UnlockMutex(is->pictq_mutex);
1596
1597         if (is->videoq.abort_request)
1598             return -1;
1599     }
1600
1601     /* if the frame is not skipped, then display it */
1602     if (vp->bmp) {
1603         AVPicture pict = { { 0 } };
1604
1605         /* get a pointer on the bitmap */
1606         SDL_LockYUVOverlay (vp->bmp);
1607
1608         pict.data[0] = vp->bmp->pixels[0];
1609         pict.data[1] = vp->bmp->pixels[2];
1610         pict.data[2] = vp->bmp->pixels[1];
1611
1612         pict.linesize[0] = vp->bmp->pitches[0];
1613         pict.linesize[1] = vp->bmp->pitches[2];
1614         pict.linesize[2] = vp->bmp->pitches[1];
1615
1616 #if CONFIG_AVFILTER
1617         // FIXME use direct rendering
1618         av_picture_copy(&pict, (AVPicture *)src_frame,
1619                         src_frame->format, vp->width, vp->height);
1620 #else
1621         av_opt_get_int(sws_opts, "sws_flags", 0, &sws_flags);
1622         is->img_convert_ctx = sws_getCachedContext(is->img_convert_ctx,
1623             vp->width, vp->height, src_frame->format, vp->width, vp->height,
1624             AV_PIX_FMT_YUV420P, sws_flags, NULL, NULL, NULL);
1625         if (is->img_convert_ctx == NULL) {
1626             av_log(NULL, AV_LOG_FATAL, "Cannot initialize the conversion context\n");
1627             exit(1);
1628         }
1629         sws_scale(is->img_convert_ctx, src_frame->data, src_frame->linesize,
1630                   0, vp->height, pict.data, pict.linesize);
1631 #endif
1632         /* workaround SDL PITCH_WORKAROUND */
1633         duplicate_right_border_pixels(vp->bmp);
1634         /* update the bitmap content */
1635         SDL_UnlockYUVOverlay(vp->bmp);
1636
1637         vp->pts = pts;
1638         vp->pos = pos;
1639         vp->serial = serial;
1640
1641         /* now we can update the picture count */
1642         if (++is->pictq_windex == VIDEO_PICTURE_QUEUE_SIZE)
1643             is->pictq_windex = 0;
1644         SDL_LockMutex(is->pictq_mutex);
1645         is->pictq_size++;
1646         SDL_UnlockMutex(is->pictq_mutex);
1647     }
1648     return 0;
1649 }
1650
1651 static int get_video_frame(VideoState *is, AVFrame *frame, AVPacket *pkt, int *serial)
1652 {
1653     int got_picture;
1654
1655     if (packet_queue_get(&is->videoq, pkt, 1, serial) < 0)
1656         return -1;
1657
1658     if (pkt->data == flush_pkt.data) {
1659         avcodec_flush_buffers(is->video_st->codec);
1660
1661         SDL_LockMutex(is->pictq_mutex);
1662         // Make sure there are no long delay timers (ideally we should just flush the queue but that's harder)
1663         while (is->pictq_size && !is->videoq.abort_request) {
1664             SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1665         }
1666         is->video_current_pos = -1;
1667         is->frame_last_pts = AV_NOPTS_VALUE;
1668         is->frame_last_duration = 0;
1669         is->frame_timer = (double)av_gettime() / 1000000.0;
1670         is->frame_last_dropped_pts = AV_NOPTS_VALUE;
1671         SDL_UnlockMutex(is->pictq_mutex);
1672         return 0;
1673     }
1674
1675     if(avcodec_decode_video2(is->video_st->codec, frame, &got_picture, pkt) < 0)
1676         return 0;
1677
1678     if (!got_picture && !pkt->data)
1679         is->video_finished = *serial;
1680
1681     if (got_picture) {
1682         int ret = 1;
1683         double dpts = NAN;
1684
1685         if (decoder_reorder_pts == -1) {
1686             frame->pts = av_frame_get_best_effort_timestamp(frame);
1687         } else if (decoder_reorder_pts) {
1688             frame->pts = frame->pkt_pts;
1689         } else {
1690             frame->pts = frame->pkt_dts;
1691         }
1692
1693         if (frame->pts != AV_NOPTS_VALUE)
1694             dpts = av_q2d(is->video_st->time_base) * frame->pts;
1695
1696         frame->sample_aspect_ratio = av_guess_sample_aspect_ratio(is->ic, is->video_st, frame);
1697
1698         if (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) {
1699             SDL_LockMutex(is->pictq_mutex);
1700             if (is->frame_last_pts != AV_NOPTS_VALUE && frame->pts != AV_NOPTS_VALUE) {
1701                 double clockdiff = get_clock(&is->vidclk) - get_master_clock(is);
1702                 double ptsdiff = dpts - is->frame_last_pts;
1703                 if (!isnan(clockdiff) && fabs(clockdiff) < AV_NOSYNC_THRESHOLD &&
1704                     !isnan(ptsdiff) && ptsdiff > 0 && ptsdiff < AV_NOSYNC_THRESHOLD &&
1705                     clockdiff + ptsdiff - is->frame_last_filter_delay < 0 &&
1706                     is->videoq.nb_packets) {
1707                     is->frame_last_dropped_pos = pkt->pos;
1708                     is->frame_last_dropped_pts = dpts;
1709                     is->frame_last_dropped_serial = *serial;
1710                     is->frame_drops_early++;
1711                     av_frame_unref(frame);
1712                     ret = 0;
1713                 }
1714             }
1715             SDL_UnlockMutex(is->pictq_mutex);
1716         }
1717
1718         return ret;
1719     }
1720     return 0;
1721 }
1722
1723 #if CONFIG_AVFILTER
1724 static int configure_filtergraph(AVFilterGraph *graph, const char *filtergraph,
1725                                  AVFilterContext *source_ctx, AVFilterContext *sink_ctx)
1726 {
1727     int ret;
1728     AVFilterInOut *outputs = NULL, *inputs = NULL;
1729
1730     if (filtergraph) {
1731         outputs = avfilter_inout_alloc();
1732         inputs  = avfilter_inout_alloc();
1733         if (!outputs || !inputs) {
1734             ret = AVERROR(ENOMEM);
1735             goto fail;
1736         }
1737
1738         outputs->name       = av_strdup("in");
1739         outputs->filter_ctx = source_ctx;
1740         outputs->pad_idx    = 0;
1741         outputs->next       = NULL;
1742
1743         inputs->name        = av_strdup("out");
1744         inputs->filter_ctx  = sink_ctx;
1745         inputs->pad_idx     = 0;
1746         inputs->next        = NULL;
1747
1748         if ((ret = avfilter_graph_parse_ptr(graph, filtergraph, &inputs, &outputs, NULL)) < 0)
1749             goto fail;
1750     } else {
1751         if ((ret = avfilter_link(source_ctx, 0, sink_ctx, 0)) < 0)
1752             goto fail;
1753     }
1754
1755     ret = avfilter_graph_config(graph, NULL);
1756 fail:
1757     avfilter_inout_free(&outputs);
1758     avfilter_inout_free(&inputs);
1759     return ret;
1760 }
1761
1762 static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const char *vfilters, AVFrame *frame)
1763 {
1764     static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE };
1765     char sws_flags_str[128];
1766     char buffersrc_args[256];
1767     int ret;
1768     AVFilterContext *filt_src = NULL, *filt_out = NULL, *filt_crop;
1769     AVCodecContext *codec = is->video_st->codec;
1770     AVRational fr = av_guess_frame_rate(is->ic, is->video_st, NULL);
1771
1772     av_opt_get_int(sws_opts, "sws_flags", 0, &sws_flags);
1773     snprintf(sws_flags_str, sizeof(sws_flags_str), "flags=%"PRId64, sws_flags);
1774     graph->scale_sws_opts = av_strdup(sws_flags_str);
1775
1776     snprintf(buffersrc_args, sizeof(buffersrc_args),
1777              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
1778              frame->width, frame->height, frame->format,
1779              is->video_st->time_base.num, is->video_st->time_base.den,
1780              codec->sample_aspect_ratio.num, FFMAX(codec->sample_aspect_ratio.den, 1));
1781     if (fr.num && fr.den)
1782         av_strlcatf(buffersrc_args, sizeof(buffersrc_args), ":frame_rate=%d/%d", fr.num, fr.den);
1783
1784     if ((ret = avfilter_graph_create_filter(&filt_src,
1785                                             avfilter_get_by_name("buffer"),
1786                                             "ffplay_buffer", buffersrc_args, NULL,
1787                                             graph)) < 0)
1788         goto fail;
1789
1790     ret = avfilter_graph_create_filter(&filt_out,
1791                                        avfilter_get_by_name("buffersink"),
1792                                        "ffplay_buffersink", NULL, NULL, graph);
1793     if (ret < 0)
1794         goto fail;
1795
1796     if ((ret = av_opt_set_int_list(filt_out, "pix_fmts", pix_fmts,  AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1797         goto fail;
1798
1799     /* SDL YUV code is not handling odd width/height for some driver
1800      * combinations, therefore we crop the picture to an even width/height. */
1801     if ((ret = avfilter_graph_create_filter(&filt_crop,
1802                                             avfilter_get_by_name("crop"),
1803                                             "ffplay_crop", "floor(in_w/2)*2:floor(in_h/2)*2", NULL, graph)) < 0)
1804         goto fail;
1805     if ((ret = avfilter_link(filt_crop, 0, filt_out, 0)) < 0)
1806         goto fail;
1807
1808     if ((ret = configure_filtergraph(graph, vfilters, filt_src, filt_crop)) < 0)
1809         goto fail;
1810
1811     is->in_video_filter  = filt_src;
1812     is->out_video_filter = filt_out;
1813
1814 fail:
1815     return ret;
1816 }
1817
1818 static int configure_audio_filters(VideoState *is, const char *afilters, int force_output_format)
1819 {
1820     static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
1821     int sample_rates[2] = { 0, -1 };
1822     int64_t channel_layouts[2] = { 0, -1 };
1823     int channels[2] = { 0, -1 };
1824     AVFilterContext *filt_asrc = NULL, *filt_asink = NULL;
1825     char asrc_args[256];
1826     int ret;
1827
1828     avfilter_graph_free(&is->agraph);
1829     if (!(is->agraph = avfilter_graph_alloc()))
1830         return AVERROR(ENOMEM);
1831
1832     ret = snprintf(asrc_args, sizeof(asrc_args),
1833                    "sample_rate=%d:sample_fmt=%s:channels=%d:time_base=%d/%d",
1834                    is->audio_filter_src.freq, av_get_sample_fmt_name(is->audio_filter_src.fmt),
1835                    is->audio_filter_src.channels,
1836                    1, is->audio_filter_src.freq);
1837     if (is->audio_filter_src.channel_layout)
1838         snprintf(asrc_args + ret, sizeof(asrc_args) - ret,
1839                  ":channel_layout=0x%"PRIx64,  is->audio_filter_src.channel_layout);
1840
1841     ret = avfilter_graph_create_filter(&filt_asrc,
1842                                        avfilter_get_by_name("abuffer"), "ffplay_abuffer",
1843                                        asrc_args, NULL, is->agraph);
1844     if (ret < 0)
1845         goto end;
1846
1847
1848     ret = avfilter_graph_create_filter(&filt_asink,
1849                                        avfilter_get_by_name("abuffersink"), "ffplay_abuffersink",
1850                                        NULL, NULL, is->agraph);
1851     if (ret < 0)
1852         goto end;
1853
1854     if ((ret = av_opt_set_int_list(filt_asink, "sample_fmts", sample_fmts,  AV_SAMPLE_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1855         goto end;
1856     if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
1857         goto end;
1858
1859     if (force_output_format) {
1860         channel_layouts[0] = is->audio_tgt.channel_layout;
1861         channels       [0] = is->audio_tgt.channels;
1862         sample_rates   [0] = is->audio_tgt.freq;
1863         if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 0, AV_OPT_SEARCH_CHILDREN)) < 0)
1864             goto end;
1865         if ((ret = av_opt_set_int_list(filt_asink, "channel_layouts", channel_layouts,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1866             goto end;
1867         if ((ret = av_opt_set_int_list(filt_asink, "channel_counts" , channels       ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1868             goto end;
1869         if ((ret = av_opt_set_int_list(filt_asink, "sample_rates"   , sample_rates   ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1870             goto end;
1871     }
1872
1873
1874     if ((ret = configure_filtergraph(is->agraph, afilters, filt_asrc, filt_asink)) < 0)
1875         goto end;
1876
1877     is->in_audio_filter  = filt_asrc;
1878     is->out_audio_filter = filt_asink;
1879
1880 end:
1881     if (ret < 0)
1882         avfilter_graph_free(&is->agraph);
1883     return ret;
1884 }
1885 #endif  /* CONFIG_AVFILTER */
1886
1887 static int video_thread(void *arg)
1888 {
1889     AVPacket pkt = { 0 };
1890     VideoState *is = arg;
1891     AVFrame *frame = av_frame_alloc();
1892     double pts;
1893     int ret;
1894     int serial = 0;
1895
1896 #if CONFIG_AVFILTER
1897     AVFilterGraph *graph = avfilter_graph_alloc();
1898     AVFilterContext *filt_out = NULL, *filt_in = NULL;
1899     int last_w = 0;
1900     int last_h = 0;
1901     enum AVPixelFormat last_format = -2;
1902     int last_serial = -1;
1903 #endif
1904
1905     for (;;) {
1906         while (is->paused && !is->videoq.abort_request)
1907             SDL_Delay(10);
1908
1909         avcodec_get_frame_defaults(frame);
1910         av_free_packet(&pkt);
1911
1912         ret = get_video_frame(is, frame, &pkt, &serial);
1913         if (ret < 0)
1914             goto the_end;
1915         if (!ret)
1916             continue;
1917
1918 #if CONFIG_AVFILTER
1919         if (   last_w != frame->width
1920             || last_h != frame->height
1921             || last_format != frame->format
1922             || last_serial != serial) {
1923             av_log(NULL, AV_LOG_DEBUG,
1924                    "Video frame changed from size:%dx%d format:%s serial:%d to size:%dx%d format:%s serial:%d\n",
1925                    last_w, last_h,
1926                    (const char *)av_x_if_null(av_get_pix_fmt_name(last_format), "none"), last_serial,
1927                    frame->width, frame->height,
1928                    (const char *)av_x_if_null(av_get_pix_fmt_name(frame->format), "none"), serial);
1929             avfilter_graph_free(&graph);
1930             graph = avfilter_graph_alloc();
1931             if ((ret = configure_video_filters(graph, is, vfilters, frame)) < 0) {
1932                 SDL_Event event;
1933                 event.type = FF_QUIT_EVENT;
1934                 event.user.data1 = is;
1935                 SDL_PushEvent(&event);
1936                 av_free_packet(&pkt);
1937                 goto the_end;
1938             }
1939             filt_in  = is->in_video_filter;
1940             filt_out = is->out_video_filter;
1941             last_w = frame->width;
1942             last_h = frame->height;
1943             last_format = frame->format;
1944             last_serial = serial;
1945         }
1946
1947         ret = av_buffersrc_add_frame(filt_in, frame);
1948         if (ret < 0)
1949             goto the_end;
1950         av_frame_unref(frame);
1951         avcodec_get_frame_defaults(frame);
1952         av_free_packet(&pkt);
1953
1954         while (ret >= 0) {
1955             is->frame_last_returned_time = av_gettime() / 1000000.0;
1956
1957             ret = av_buffersink_get_frame_flags(filt_out, frame, 0);
1958             if (ret < 0) {
1959                 if (ret == AVERROR_EOF)
1960                     is->video_finished = serial;
1961                 ret = 0;
1962                 break;
1963             }
1964
1965             is->frame_last_filter_delay = av_gettime() / 1000000.0 - is->frame_last_returned_time;
1966             if (fabs(is->frame_last_filter_delay) > AV_NOSYNC_THRESHOLD / 10.0)
1967                 is->frame_last_filter_delay = 0;
1968
1969             pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(filt_out->inputs[0]->time_base);
1970             ret = queue_picture(is, frame, pts, av_frame_get_pkt_pos(frame), serial);
1971             av_frame_unref(frame);
1972         }
1973 #else
1974         pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(is->video_st->time_base);
1975         ret = queue_picture(is, frame, pts, pkt.pos, serial);
1976         av_frame_unref(frame);
1977 #endif
1978
1979         if (ret < 0)
1980             goto the_end;
1981     }
1982  the_end:
1983     avcodec_flush_buffers(is->video_st->codec);
1984 #if CONFIG_AVFILTER
1985     avfilter_graph_free(&graph);
1986 #endif
1987     av_free_packet(&pkt);
1988     av_frame_free(&frame);
1989     return 0;
1990 }
1991
1992 static int subtitle_thread(void *arg)
1993 {
1994     VideoState *is = arg;
1995     SubPicture *sp;
1996     AVPacket pkt1, *pkt = &pkt1;
1997     int got_subtitle;
1998     int serial;
1999     double pts;
2000     int i, j;
2001     int r, g, b, y, u, v, a;
2002
2003     for (;;) {
2004         while (is->paused && !is->subtitleq.abort_request) {
2005             SDL_Delay(10);
2006         }
2007         if (packet_queue_get(&is->subtitleq, pkt, 1, &serial) < 0)
2008             break;
2009
2010         if (pkt->data == flush_pkt.data) {
2011             avcodec_flush_buffers(is->subtitle_st->codec);
2012             continue;
2013         }
2014         SDL_LockMutex(is->subpq_mutex);
2015         while (is->subpq_size >= SUBPICTURE_QUEUE_SIZE &&
2016                !is->subtitleq.abort_request) {
2017             SDL_CondWait(is->subpq_cond, is->subpq_mutex);
2018         }
2019         SDL_UnlockMutex(is->subpq_mutex);
2020
2021         if (is->subtitleq.abort_request)
2022             return 0;
2023
2024         sp = &is->subpq[is->subpq_windex];
2025
2026        /* NOTE: ipts is the PTS of the _first_ picture beginning in
2027            this packet, if any */
2028         pts = 0;
2029         if (pkt->pts != AV_NOPTS_VALUE)
2030             pts = av_q2d(is->subtitle_st->time_base) * pkt->pts;
2031
2032         avcodec_decode_subtitle2(is->subtitle_st->codec, &sp->sub,
2033                                  &got_subtitle, pkt);
2034         if (got_subtitle && sp->sub.format == 0) {
2035             if (sp->sub.pts != AV_NOPTS_VALUE)
2036                 pts = sp->sub.pts / (double)AV_TIME_BASE;
2037             sp->pts = pts;
2038             sp->serial = serial;
2039
2040             for (i = 0; i < sp->sub.num_rects; i++)
2041             {
2042                 for (j = 0; j < sp->sub.rects[i]->nb_colors; j++)
2043                 {
2044                     RGBA_IN(r, g, b, a, (uint32_t*)sp->sub.rects[i]->pict.data[1] + j);
2045                     y = RGB_TO_Y_CCIR(r, g, b);
2046                     u = RGB_TO_U_CCIR(r, g, b, 0);
2047                     v = RGB_TO_V_CCIR(r, g, b, 0);
2048                     YUVA_OUT((uint32_t*)sp->sub.rects[i]->pict.data[1] + j, y, u, v, a);
2049                 }
2050             }
2051
2052             /* now we can update the picture count */
2053             if (++is->subpq_windex == SUBPICTURE_QUEUE_SIZE)
2054                 is->subpq_windex = 0;
2055             SDL_LockMutex(is->subpq_mutex);
2056             is->subpq_size++;
2057             SDL_UnlockMutex(is->subpq_mutex);
2058         } else if (got_subtitle) {
2059             avsubtitle_free(&sp->sub);
2060         }
2061         av_free_packet(pkt);
2062     }
2063     return 0;
2064 }
2065
2066 /* copy samples for viewing in editor window */
2067 static void update_sample_display(VideoState *is, short *samples, int samples_size)
2068 {
2069     int size, len;
2070
2071     size = samples_size / sizeof(short);
2072     while (size > 0) {
2073         len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
2074         if (len > size)
2075             len = size;
2076         memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
2077         samples += len;
2078         is->sample_array_index += len;
2079         if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
2080             is->sample_array_index = 0;
2081         size -= len;
2082     }
2083 }
2084
2085 /* return the wanted number of samples to get better sync if sync_type is video
2086  * or external master clock */
2087 static int synchronize_audio(VideoState *is, int nb_samples)
2088 {
2089     int wanted_nb_samples = nb_samples;
2090
2091     /* if not master, then we try to remove or add samples to correct the clock */
2092     if (get_master_sync_type(is) != AV_SYNC_AUDIO_MASTER) {
2093         double diff, avg_diff;
2094         int min_nb_samples, max_nb_samples;
2095
2096         diff = get_clock(&is->audclk) - get_master_clock(is);
2097
2098         if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD) {
2099             is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
2100             if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
2101                 /* not enough measures to have a correct estimate */
2102                 is->audio_diff_avg_count++;
2103             } else {
2104                 /* estimate the A-V difference */
2105                 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
2106
2107                 if (fabs(avg_diff) >= is->audio_diff_threshold) {
2108                     wanted_nb_samples = nb_samples + (int)(diff * is->audio_src.freq);
2109                     min_nb_samples = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2110                     max_nb_samples = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2111                     wanted_nb_samples = FFMIN(FFMAX(wanted_nb_samples, min_nb_samples), max_nb_samples);
2112                 }
2113                 av_dlog(NULL, "diff=%f adiff=%f sample_diff=%d apts=%0.3f %f\n",
2114                         diff, avg_diff, wanted_nb_samples - nb_samples,
2115                         is->audio_clock, is->audio_diff_threshold);
2116             }
2117         } else {
2118             /* too big difference : may be initial PTS errors, so
2119                reset A-V filter */
2120             is->audio_diff_avg_count = 0;
2121             is->audio_diff_cum       = 0;
2122         }
2123     }
2124
2125     return wanted_nb_samples;
2126 }
2127
2128 /**
2129  * Decode one audio frame and return its uncompressed size.
2130  *
2131  * The processed audio frame is decoded, converted if required, and
2132  * stored in is->audio_buf, with size in bytes given by the return
2133  * value.
2134  */
2135 static int audio_decode_frame(VideoState *is)
2136 {
2137     AVPacket *pkt_temp = &is->audio_pkt_temp;
2138     AVPacket *pkt = &is->audio_pkt;
2139     AVCodecContext *dec = is->audio_st->codec;
2140     int len1, data_size, resampled_data_size;
2141     int64_t dec_channel_layout;
2142     int got_frame;
2143     av_unused double audio_clock0;
2144     int wanted_nb_samples;
2145     AVRational tb;
2146     int ret;
2147     int reconfigure;
2148
2149     for (;;) {
2150         /* NOTE: the audio packet can contain several frames */
2151         while (pkt_temp->stream_index != -1 || is->audio_buf_frames_pending) {
2152             if (!is->frame) {
2153                 if (!(is->frame = avcodec_alloc_frame()))
2154                     return AVERROR(ENOMEM);
2155             } else {
2156                 av_frame_unref(is->frame);
2157                 avcodec_get_frame_defaults(is->frame);
2158             }
2159
2160             if (is->audioq.serial != is->audio_pkt_temp_serial)
2161                 break;
2162
2163             if (is->paused)
2164                 return -1;
2165
2166             if (!is->audio_buf_frames_pending) {
2167                 len1 = avcodec_decode_audio4(dec, is->frame, &got_frame, pkt_temp);
2168                 if (len1 < 0) {
2169                     /* if error, we skip the frame */
2170                     pkt_temp->size = 0;
2171                     break;
2172                 }
2173
2174                 pkt_temp->dts =
2175                 pkt_temp->pts = AV_NOPTS_VALUE;
2176                 pkt_temp->data += len1;
2177                 pkt_temp->size -= len1;
2178                 if (pkt_temp->data && pkt_temp->size <= 0 || !pkt_temp->data && !got_frame)
2179                     pkt_temp->stream_index = -1;
2180                 if (!pkt_temp->data && !got_frame)
2181                     is->audio_finished = is->audio_pkt_temp_serial;
2182
2183                 if (!got_frame)
2184                     continue;
2185
2186                 tb = (AVRational){1, is->frame->sample_rate};
2187                 if (is->frame->pts != AV_NOPTS_VALUE)
2188                     is->frame->pts = av_rescale_q(is->frame->pts, dec->time_base, tb);
2189                 else if (is->frame->pkt_pts != AV_NOPTS_VALUE)
2190                     is->frame->pts = av_rescale_q(is->frame->pkt_pts, is->audio_st->time_base, tb);
2191                 else if (is->audio_frame_next_pts != AV_NOPTS_VALUE)
2192 #if CONFIG_AVFILTER
2193                     is->frame->pts = av_rescale_q(is->audio_frame_next_pts, (AVRational){1, is->audio_filter_src.freq}, tb);
2194 #else
2195                     is->frame->pts = av_rescale_q(is->audio_frame_next_pts, (AVRational){1, is->audio_src.freq}, tb);
2196 #endif
2197
2198                 if (is->frame->pts != AV_NOPTS_VALUE)
2199                     is->audio_frame_next_pts = is->frame->pts + is->frame->nb_samples;
2200
2201 #if CONFIG_AVFILTER
2202                 dec_channel_layout = get_valid_channel_layout(is->frame->channel_layout, av_frame_get_channels(is->frame));
2203
2204                 reconfigure =
2205                     cmp_audio_fmts(is->audio_filter_src.fmt, is->audio_filter_src.channels,
2206                                    is->frame->format, av_frame_get_channels(is->frame))    ||
2207                     is->audio_filter_src.channel_layout != dec_channel_layout ||
2208                     is->audio_filter_src.freq           != is->frame->sample_rate ||
2209                     is->audio_pkt_temp_serial           != is->audio_last_serial;
2210
2211                 if (reconfigure) {
2212                     char buf1[1024], buf2[1024];
2213                     av_get_channel_layout_string(buf1, sizeof(buf1), -1, is->audio_filter_src.channel_layout);
2214                     av_get_channel_layout_string(buf2, sizeof(buf2), -1, dec_channel_layout);
2215                     av_log(NULL, AV_LOG_DEBUG,
2216                            "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",
2217                            is->audio_filter_src.freq, is->audio_filter_src.channels, av_get_sample_fmt_name(is->audio_filter_src.fmt), buf1, is->audio_last_serial,
2218                            is->frame->sample_rate, av_frame_get_channels(is->frame), av_get_sample_fmt_name(is->frame->format), buf2, is->audio_pkt_temp_serial);
2219
2220                     is->audio_filter_src.fmt            = is->frame->format;
2221                     is->audio_filter_src.channels       = av_frame_get_channels(is->frame);
2222                     is->audio_filter_src.channel_layout = dec_channel_layout;
2223                     is->audio_filter_src.freq           = is->frame->sample_rate;
2224                     is->audio_last_serial               = is->audio_pkt_temp_serial;
2225
2226                     if ((ret = configure_audio_filters(is, afilters, 1)) < 0)
2227                         return ret;
2228                 }
2229
2230                 if ((ret = av_buffersrc_add_frame(is->in_audio_filter, is->frame)) < 0)
2231                     return ret;
2232                 av_frame_unref(is->frame);
2233 #endif
2234             }
2235 #if CONFIG_AVFILTER
2236             if ((ret = av_buffersink_get_frame_flags(is->out_audio_filter, is->frame, 0)) < 0) {
2237                 if (ret == AVERROR(EAGAIN)) {
2238                     is->audio_buf_frames_pending = 0;
2239                     continue;
2240                 }
2241                 if (ret == AVERROR_EOF)
2242                     is->audio_finished = is->audio_pkt_temp_serial;
2243                 return ret;
2244             }
2245             is->audio_buf_frames_pending = 1;
2246             tb = is->out_audio_filter->inputs[0]->time_base;
2247 #endif
2248
2249             data_size = av_samples_get_buffer_size(NULL, av_frame_get_channels(is->frame),
2250                                                    is->frame->nb_samples,
2251                                                    is->frame->format, 1);
2252
2253             dec_channel_layout =
2254                 (is->frame->channel_layout && av_frame_get_channels(is->frame) == av_get_channel_layout_nb_channels(is->frame->channel_layout)) ?
2255                 is->frame->channel_layout : av_get_default_channel_layout(av_frame_get_channels(is->frame));
2256             wanted_nb_samples = synchronize_audio(is, is->frame->nb_samples);
2257
2258             if (is->frame->format        != is->audio_src.fmt            ||
2259                 dec_channel_layout       != is->audio_src.channel_layout ||
2260                 is->frame->sample_rate   != is->audio_src.freq           ||
2261                 (wanted_nb_samples       != is->frame->nb_samples && !is->swr_ctx)) {
2262                 swr_free(&is->swr_ctx);
2263                 is->swr_ctx = swr_alloc_set_opts(NULL,
2264                                                  is->audio_tgt.channel_layout, is->audio_tgt.fmt, is->audio_tgt.freq,
2265                                                  dec_channel_layout,           is->frame->format, is->frame->sample_rate,
2266                                                  0, NULL);
2267                 if (!is->swr_ctx || swr_init(is->swr_ctx) < 0) {
2268                     av_log(NULL, AV_LOG_ERROR,
2269                            "Cannot create sample rate converter for conversion of %d Hz %s %d channels to %d Hz %s %d channels!\n",
2270                             is->frame->sample_rate, av_get_sample_fmt_name(is->frame->format), av_frame_get_channels(is->frame),
2271                             is->audio_tgt.freq, av_get_sample_fmt_name(is->audio_tgt.fmt), is->audio_tgt.channels);
2272                     break;
2273                 }
2274                 is->audio_src.channel_layout = dec_channel_layout;
2275                 is->audio_src.channels       = av_frame_get_channels(is->frame);
2276                 is->audio_src.freq = is->frame->sample_rate;
2277                 is->audio_src.fmt = is->frame->format;
2278             }
2279
2280             if (is->swr_ctx) {
2281                 const uint8_t **in = (const uint8_t **)is->frame->extended_data;
2282                 uint8_t **out = &is->audio_buf1;
2283                 int out_count = (int64_t)wanted_nb_samples * is->audio_tgt.freq / is->frame->sample_rate + 256;
2284                 int out_size  = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, out_count, is->audio_tgt.fmt, 0);
2285                 int len2;
2286                 if (out_size < 0) {
2287                     av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size() failed\n");
2288                     break;
2289                 }
2290                 if (wanted_nb_samples != is->frame->nb_samples) {
2291                     if (swr_set_compensation(is->swr_ctx, (wanted_nb_samples - is->frame->nb_samples) * is->audio_tgt.freq / is->frame->sample_rate,
2292                                                 wanted_nb_samples * is->audio_tgt.freq / is->frame->sample_rate) < 0) {
2293                         av_log(NULL, AV_LOG_ERROR, "swr_set_compensation() failed\n");
2294                         break;
2295                     }
2296                 }
2297                 av_fast_malloc(&is->audio_buf1, &is->audio_buf1_size, out_size);
2298                 if (!is->audio_buf1)
2299                     return AVERROR(ENOMEM);
2300                 len2 = swr_convert(is->swr_ctx, out, out_count, in, is->frame->nb_samples);
2301                 if (len2 < 0) {
2302                     av_log(NULL, AV_LOG_ERROR, "swr_convert() failed\n");
2303                     break;
2304                 }
2305                 if (len2 == out_count) {
2306                     av_log(NULL, AV_LOG_WARNING, "audio buffer is probably too small\n");
2307                     swr_init(is->swr_ctx);
2308                 }
2309                 is->audio_buf = is->audio_buf1;
2310                 resampled_data_size = len2 * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2311             } else {
2312                 is->audio_buf = is->frame->data[0];
2313                 resampled_data_size = data_size;
2314             }
2315
2316             audio_clock0 = is->audio_clock;
2317             /* update the audio clock with the pts */
2318             if (is->frame->pts != AV_NOPTS_VALUE)
2319                 is->audio_clock = is->frame->pts * av_q2d(tb) + (double) is->frame->nb_samples / is->frame->sample_rate;
2320             else
2321                 is->audio_clock = NAN;
2322             is->audio_clock_serial = is->audio_pkt_temp_serial;
2323 #ifdef DEBUG
2324             {
2325                 static double last_clock;
2326                 printf("audio: delay=%0.3f clock=%0.3f clock0=%0.3f\n",
2327                        is->audio_clock - last_clock,
2328                        is->audio_clock, audio_clock0);
2329                 last_clock = is->audio_clock;
2330             }
2331 #endif
2332             return resampled_data_size;
2333         }
2334
2335         /* free the current packet */
2336         if (pkt->data)
2337             av_free_packet(pkt);
2338         memset(pkt_temp, 0, sizeof(*pkt_temp));
2339         pkt_temp->stream_index = -1;
2340
2341         if (is->audioq.abort_request) {
2342             return -1;
2343         }
2344
2345         if (is->audioq.nb_packets == 0)
2346             SDL_CondSignal(is->continue_read_thread);
2347
2348         /* read next packet */
2349         if ((packet_queue_get(&is->audioq, pkt, 1, &is->audio_pkt_temp_serial)) < 0)
2350             return -1;
2351
2352         if (pkt->data == flush_pkt.data) {
2353             avcodec_flush_buffers(dec);
2354             is->audio_buf_frames_pending = 0;
2355             is->audio_frame_next_pts = AV_NOPTS_VALUE;
2356             if ((is->ic->iformat->flags & (AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK)) && !is->ic->iformat->read_seek)
2357                 is->audio_frame_next_pts = is->audio_st->start_time;
2358         }
2359
2360         *pkt_temp = *pkt;
2361     }
2362 }
2363
2364 /* prepare a new audio buffer */
2365 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
2366 {
2367     VideoState *is = opaque;
2368     int audio_size, len1;
2369     int bytes_per_sec;
2370     int frame_size = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, 1, is->audio_tgt.fmt, 1);
2371
2372     audio_callback_time = av_gettime();
2373
2374     while (len > 0) {
2375         if (is->audio_buf_index >= is->audio_buf_size) {
2376            audio_size = audio_decode_frame(is);
2377            if (audio_size < 0) {
2378                 /* if error, just output silence */
2379                is->audio_buf      = is->silence_buf;
2380                is->audio_buf_size = sizeof(is->silence_buf) / frame_size * frame_size;
2381            } else {
2382                if (is->show_mode != SHOW_MODE_VIDEO)
2383                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2384                is->audio_buf_size = audio_size;
2385            }
2386            is->audio_buf_index = 0;
2387         }
2388         len1 = is->audio_buf_size - is->audio_buf_index;
2389         if (len1 > len)
2390             len1 = len;
2391         memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2392         len -= len1;
2393         stream += len1;
2394         is->audio_buf_index += len1;
2395     }
2396     bytes_per_sec = is->audio_tgt.freq * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2397     is->audio_write_buf_size = is->audio_buf_size - is->audio_buf_index;
2398     /* Let's assume the audio driver that is used by SDL has two periods. */
2399     if (!isnan(is->audio_clock)) {
2400         set_clock_at(&is->audclk, is->audio_clock - (double)(2 * is->audio_hw_buf_size + is->audio_write_buf_size) / bytes_per_sec, is->audio_clock_serial, audio_callback_time / 1000000.0);
2401         sync_clock_to_slave(&is->extclk, &is->audclk);
2402     }
2403 }
2404
2405 static int audio_open(void *opaque, int64_t wanted_channel_layout, int wanted_nb_channels, int wanted_sample_rate, struct AudioParams *audio_hw_params)
2406 {
2407     SDL_AudioSpec wanted_spec, spec;
2408     const char *env;
2409     static const int next_nb_channels[] = {0, 0, 1, 6, 2, 6, 4, 6};
2410
2411     env = SDL_getenv("SDL_AUDIO_CHANNELS");
2412     if (env) {
2413         wanted_nb_channels = atoi(env);
2414         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2415     }
2416     if (!wanted_channel_layout || wanted_nb_channels != av_get_channel_layout_nb_channels(wanted_channel_layout)) {
2417         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2418         wanted_channel_layout &= ~AV_CH_LAYOUT_STEREO_DOWNMIX;
2419     }
2420     wanted_spec.channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
2421     wanted_spec.freq = wanted_sample_rate;
2422     if (wanted_spec.freq <= 0 || wanted_spec.channels <= 0) {
2423         av_log(NULL, AV_LOG_ERROR, "Invalid sample rate or channel count!\n");
2424         return -1;
2425     }
2426     wanted_spec.format = AUDIO_S16SYS;
2427     wanted_spec.silence = 0;
2428     wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
2429     wanted_spec.callback = sdl_audio_callback;
2430     wanted_spec.userdata = opaque;
2431     while (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
2432         av_log(NULL, AV_LOG_WARNING, "SDL_OpenAudio (%d channels): %s\n", wanted_spec.channels, SDL_GetError());
2433         wanted_spec.channels = next_nb_channels[FFMIN(7, wanted_spec.channels)];
2434         if (!wanted_spec.channels) {
2435             av_log(NULL, AV_LOG_ERROR,
2436                    "No more channel combinations to try, audio open failed\n");
2437             return -1;
2438         }
2439         wanted_channel_layout = av_get_default_channel_layout(wanted_spec.channels);
2440     }
2441     if (spec.format != AUDIO_S16SYS) {
2442         av_log(NULL, AV_LOG_ERROR,
2443                "SDL advised audio format %d is not supported!\n", spec.format);
2444         return -1;
2445     }
2446     if (spec.channels != wanted_spec.channels) {
2447         wanted_channel_layout = av_get_default_channel_layout(spec.channels);
2448         if (!wanted_channel_layout) {
2449             av_log(NULL, AV_LOG_ERROR,
2450                    "SDL advised channel count %d is not supported!\n", spec.channels);
2451             return -1;
2452         }
2453     }
2454
2455     audio_hw_params->fmt = AV_SAMPLE_FMT_S16;
2456     audio_hw_params->freq = spec.freq;
2457     audio_hw_params->channel_layout = wanted_channel_layout;
2458     audio_hw_params->channels =  spec.channels;
2459     return spec.size;
2460 }
2461
2462 /* open a given stream. Return 0 if OK */
2463 static int stream_component_open(VideoState *is, int stream_index)
2464 {
2465     AVFormatContext *ic = is->ic;
2466     AVCodecContext *avctx;
2467     AVCodec *codec;
2468     const char *forced_codec_name = NULL;
2469     AVDictionary *opts;
2470     AVDictionaryEntry *t = NULL;
2471     int sample_rate, nb_channels;
2472     int64_t channel_layout;
2473     int ret;
2474
2475     if (stream_index < 0 || stream_index >= ic->nb_streams)
2476         return -1;
2477     avctx = ic->streams[stream_index]->codec;
2478
2479     codec = avcodec_find_decoder(avctx->codec_id);
2480
2481     switch(avctx->codec_type){
2482         case AVMEDIA_TYPE_AUDIO   : is->last_audio_stream    = stream_index; forced_codec_name =    audio_codec_name; break;
2483         case AVMEDIA_TYPE_SUBTITLE: is->last_subtitle_stream = stream_index; forced_codec_name = subtitle_codec_name; break;
2484         case AVMEDIA_TYPE_VIDEO   : is->last_video_stream    = stream_index; forced_codec_name =    video_codec_name; break;
2485     }
2486     if (forced_codec_name)
2487         codec = avcodec_find_decoder_by_name(forced_codec_name);
2488     if (!codec) {
2489         if (forced_codec_name) av_log(NULL, AV_LOG_WARNING,
2490                                       "No codec could be found with name '%s'\n", forced_codec_name);
2491         else                   av_log(NULL, AV_LOG_WARNING,
2492                                       "No codec could be found with id %d\n", avctx->codec_id);
2493         return -1;
2494     }
2495
2496     avctx->codec_id = codec->id;
2497     avctx->workaround_bugs   = workaround_bugs;
2498     avctx->lowres            = lowres;
2499     if(avctx->lowres > codec->max_lowres){
2500         av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
2501                 codec->max_lowres);
2502         avctx->lowres= codec->max_lowres;
2503     }
2504     avctx->error_concealment = error_concealment;
2505
2506     if(avctx->lowres) avctx->flags |= CODEC_FLAG_EMU_EDGE;
2507     if (fast)   avctx->flags2 |= CODEC_FLAG2_FAST;
2508     if(codec->capabilities & CODEC_CAP_DR1)
2509         avctx->flags |= CODEC_FLAG_EMU_EDGE;
2510
2511     opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], codec);
2512     if (!av_dict_get(opts, "threads", NULL, 0))
2513         av_dict_set(&opts, "threads", "auto", 0);
2514     if (avctx->lowres)
2515         av_dict_set(&opts, "lowres", av_asprintf("%d", avctx->lowres), AV_DICT_DONT_STRDUP_VAL);
2516     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
2517         av_dict_set(&opts, "refcounted_frames", "1", 0);
2518     if (avcodec_open2(avctx, codec, &opts) < 0)
2519         return -1;
2520     if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2521         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2522         return AVERROR_OPTION_NOT_FOUND;
2523     }
2524
2525     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
2526     switch (avctx->codec_type) {
2527     case AVMEDIA_TYPE_AUDIO:
2528 #if CONFIG_AVFILTER
2529         {
2530             AVFilterLink *link;
2531
2532             is->audio_filter_src.freq           = avctx->sample_rate;
2533             is->audio_filter_src.channels       = avctx->channels;
2534             is->audio_filter_src.channel_layout = get_valid_channel_layout(avctx->channel_layout, avctx->channels);
2535             is->audio_filter_src.fmt            = avctx->sample_fmt;
2536             if ((ret = configure_audio_filters(is, afilters, 0)) < 0)
2537                 return ret;
2538             link = is->out_audio_filter->inputs[0];
2539             sample_rate    = link->sample_rate;
2540             nb_channels    = link->channels;
2541             channel_layout = link->channel_layout;
2542         }
2543 #else
2544         sample_rate    = avctx->sample_rate;
2545         nb_channels    = avctx->channels;
2546         channel_layout = avctx->channel_layout;
2547 #endif
2548
2549         /* prepare audio output */
2550         if ((ret = audio_open(is, channel_layout, nb_channels, sample_rate, &is->audio_tgt)) < 0)
2551             return ret;
2552         is->audio_hw_buf_size = ret;
2553         is->audio_src = is->audio_tgt;
2554         is->audio_buf_size  = 0;
2555         is->audio_buf_index = 0;
2556
2557         /* init averaging filter */
2558         is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2559         is->audio_diff_avg_count = 0;
2560         /* since we do not have a precise anough audio fifo fullness,
2561            we correct audio sync only if larger than this threshold */
2562         is->audio_diff_threshold = 2.0 * is->audio_hw_buf_size / av_samples_get_buffer_size(NULL, is->audio_tgt.channels, is->audio_tgt.freq, is->audio_tgt.fmt, 1);
2563
2564         memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
2565         memset(&is->audio_pkt_temp, 0, sizeof(is->audio_pkt_temp));
2566         is->audio_pkt_temp.stream_index = -1;
2567
2568         is->audio_stream = stream_index;
2569         is->audio_st = ic->streams[stream_index];
2570
2571         packet_queue_start(&is->audioq);
2572         SDL_PauseAudio(0);
2573         break;
2574     case AVMEDIA_TYPE_VIDEO:
2575         is->video_stream = stream_index;
2576         is->video_st = ic->streams[stream_index];
2577
2578         packet_queue_start(&is->videoq);
2579         is->video_tid = SDL_CreateThread(video_thread, is);
2580         is->queue_attachments_req = 1;
2581         break;
2582     case AVMEDIA_TYPE_SUBTITLE:
2583         is->subtitle_stream = stream_index;
2584         is->subtitle_st = ic->streams[stream_index];
2585         packet_queue_start(&is->subtitleq);
2586
2587         is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
2588         break;
2589     default:
2590         break;
2591     }
2592     return 0;
2593 }
2594
2595 static void stream_component_close(VideoState *is, int stream_index)
2596 {
2597     AVFormatContext *ic = is->ic;
2598     AVCodecContext *avctx;
2599
2600     if (stream_index < 0 || stream_index >= ic->nb_streams)
2601         return;
2602     avctx = ic->streams[stream_index]->codec;
2603
2604     switch (avctx->codec_type) {
2605     case AVMEDIA_TYPE_AUDIO:
2606         packet_queue_abort(&is->audioq);
2607
2608         SDL_CloseAudio();
2609
2610         packet_queue_flush(&is->audioq);
2611         av_free_packet(&is->audio_pkt);
2612         swr_free(&is->swr_ctx);
2613         av_freep(&is->audio_buf1);
2614         is->audio_buf1_size = 0;
2615         is->audio_buf = NULL;
2616         av_frame_free(&is->frame);
2617
2618         if (is->rdft) {
2619             av_rdft_end(is->rdft);
2620             av_freep(&is->rdft_data);
2621             is->rdft = NULL;
2622             is->rdft_bits = 0;
2623         }
2624 #if CONFIG_AVFILTER
2625         avfilter_graph_free(&is->agraph);
2626 #endif
2627         break;
2628     case AVMEDIA_TYPE_VIDEO:
2629         packet_queue_abort(&is->videoq);
2630
2631         /* note: we also signal this mutex to make sure we deblock the
2632            video thread in all cases */
2633         SDL_LockMutex(is->pictq_mutex);
2634         SDL_CondSignal(is->pictq_cond);
2635         SDL_UnlockMutex(is->pictq_mutex);
2636
2637         SDL_WaitThread(is->video_tid, NULL);
2638
2639         packet_queue_flush(&is->videoq);
2640         break;
2641     case AVMEDIA_TYPE_SUBTITLE:
2642         packet_queue_abort(&is->subtitleq);
2643
2644         /* note: we also signal this mutex to make sure we deblock the
2645            video thread in all cases */
2646         SDL_LockMutex(is->subpq_mutex);
2647         SDL_CondSignal(is->subpq_cond);
2648         SDL_UnlockMutex(is->subpq_mutex);
2649
2650         SDL_WaitThread(is->subtitle_tid, NULL);
2651
2652         packet_queue_flush(&is->subtitleq);
2653         break;
2654     default:
2655         break;
2656     }
2657
2658     ic->streams[stream_index]->discard = AVDISCARD_ALL;
2659     avcodec_close(avctx);
2660     switch (avctx->codec_type) {
2661     case AVMEDIA_TYPE_AUDIO:
2662         is->audio_st = NULL;
2663         is->audio_stream = -1;
2664         break;
2665     case AVMEDIA_TYPE_VIDEO:
2666         is->video_st = NULL;
2667         is->video_stream = -1;
2668         break;
2669     case AVMEDIA_TYPE_SUBTITLE:
2670         is->subtitle_st = NULL;
2671         is->subtitle_stream = -1;
2672         break;
2673     default:
2674         break;
2675     }
2676 }
2677
2678 static int decode_interrupt_cb(void *ctx)
2679 {
2680     VideoState *is = ctx;
2681     return is->abort_request;
2682 }
2683
2684 static int is_realtime(AVFormatContext *s)
2685 {
2686     if(   !strcmp(s->iformat->name, "rtp")
2687        || !strcmp(s->iformat->name, "rtsp")
2688        || !strcmp(s->iformat->name, "sdp")
2689     )
2690         return 1;
2691
2692     if(s->pb && (   !strncmp(s->filename, "rtp:", 4)
2693                  || !strncmp(s->filename, "udp:", 4)
2694                 )
2695     )
2696         return 1;
2697     return 0;
2698 }
2699
2700 /* this thread gets the stream from the disk or the network */
2701 static int read_thread(void *arg)
2702 {
2703     VideoState *is = arg;
2704     AVFormatContext *ic = NULL;
2705     int err, i, ret;
2706     int st_index[AVMEDIA_TYPE_NB];
2707     AVPacket pkt1, *pkt = &pkt1;
2708     int eof = 0;
2709     int64_t stream_start_time;
2710     int pkt_in_play_range = 0;
2711     AVDictionaryEntry *t;
2712     AVDictionary **opts;
2713     int orig_nb_streams;
2714     SDL_mutex *wait_mutex = SDL_CreateMutex();
2715
2716     memset(st_index, -1, sizeof(st_index));
2717     is->last_video_stream = is->video_stream = -1;
2718     is->last_audio_stream = is->audio_stream = -1;
2719     is->last_subtitle_stream = is->subtitle_stream = -1;
2720
2721     ic = avformat_alloc_context();
2722     ic->interrupt_callback.callback = decode_interrupt_cb;
2723     ic->interrupt_callback.opaque = is;
2724     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2725     if (err < 0) {
2726         print_error(is->filename, err);
2727         ret = -1;
2728         goto fail;
2729     }
2730     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2731         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2732         ret = AVERROR_OPTION_NOT_FOUND;
2733         goto fail;
2734     }
2735     is->ic = ic;
2736
2737     if (genpts)
2738         ic->flags |= AVFMT_FLAG_GENPTS;
2739
2740     opts = setup_find_stream_info_opts(ic, codec_opts);
2741     orig_nb_streams = ic->nb_streams;
2742
2743     err = avformat_find_stream_info(ic, opts);
2744     if (err < 0) {
2745         av_log(NULL, AV_LOG_WARNING,
2746                "%s: could not find codec parameters\n", is->filename);
2747         ret = -1;
2748         goto fail;
2749     }
2750     for (i = 0; i < orig_nb_streams; i++)
2751         av_dict_free(&opts[i]);
2752     av_freep(&opts);
2753
2754     if (ic->pb)
2755         ic->pb->eof_reached = 0; // FIXME hack, ffplay maybe should not use url_feof() to test for the end
2756
2757     if (seek_by_bytes < 0)
2758         seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT) && strcmp("ogg", ic->iformat->name);
2759
2760     is->max_frame_duration = (ic->iformat->flags & AVFMT_TS_DISCONT) ? 10.0 : 3600.0;
2761
2762     if (!window_title && (t = av_dict_get(ic->metadata, "title", NULL, 0)))
2763         window_title = av_asprintf("%s - %s", t->value, input_filename);
2764
2765     /* if seeking requested, we execute it */
2766     if (start_time != AV_NOPTS_VALUE) {
2767         int64_t timestamp;
2768
2769         timestamp = start_time;
2770         /* add the stream start time */
2771         if (ic->start_time != AV_NOPTS_VALUE)
2772             timestamp += ic->start_time;
2773         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
2774         if (ret < 0) {
2775             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
2776                     is->filename, (double)timestamp / AV_TIME_BASE);
2777         }
2778     }
2779
2780     is->realtime = is_realtime(ic);
2781
2782     for (i = 0; i < ic->nb_streams; i++)
2783         ic->streams[i]->discard = AVDISCARD_ALL;
2784     if (!video_disable)
2785         st_index[AVMEDIA_TYPE_VIDEO] =
2786             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
2787                                 wanted_stream[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
2788     if (!audio_disable)
2789         st_index[AVMEDIA_TYPE_AUDIO] =
2790             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
2791                                 wanted_stream[AVMEDIA_TYPE_AUDIO],
2792                                 st_index[AVMEDIA_TYPE_VIDEO],
2793                                 NULL, 0);
2794     if (!video_disable && !subtitle_disable)
2795         st_index[AVMEDIA_TYPE_SUBTITLE] =
2796             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
2797                                 wanted_stream[AVMEDIA_TYPE_SUBTITLE],
2798                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
2799                                  st_index[AVMEDIA_TYPE_AUDIO] :
2800                                  st_index[AVMEDIA_TYPE_VIDEO]),
2801                                 NULL, 0);
2802     if (show_status) {
2803         av_dump_format(ic, 0, is->filename, 0);
2804     }
2805
2806     is->show_mode = show_mode;
2807
2808     /* open the streams */
2809     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
2810         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2811     }
2812
2813     ret = -1;
2814     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2815         ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2816     }
2817     if (is->show_mode == SHOW_MODE_NONE)
2818         is->show_mode = ret >= 0 ? SHOW_MODE_VIDEO : SHOW_MODE_RDFT;
2819
2820     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
2821         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2822     }
2823
2824     if (is->video_stream < 0 && is->audio_stream < 0) {
2825         av_log(NULL, AV_LOG_FATAL, "Failed to open file '%s' or configure filtergraph\n",
2826                is->filename);
2827         ret = -1;
2828         goto fail;
2829     }
2830
2831     if (infinite_buffer < 0 && is->realtime)
2832         infinite_buffer = 1;
2833
2834     for (;;) {
2835         if (is->abort_request)
2836             break;
2837         if (is->paused != is->last_paused) {
2838             is->last_paused = is->paused;
2839             if (is->paused)
2840                 is->read_pause_return = av_read_pause(ic);
2841             else
2842                 av_read_play(ic);
2843         }
2844 #if CONFIG_RTSP_DEMUXER || CONFIG_MMSH_PROTOCOL
2845         if (is->paused &&
2846                 (!strcmp(ic->iformat->name, "rtsp") ||
2847                  (ic->pb && !strncmp(input_filename, "mmsh:", 5)))) {
2848             /* wait 10 ms to avoid trying to get another packet */
2849             /* XXX: horrible */
2850             SDL_Delay(10);
2851             continue;
2852         }
2853 #endif
2854         if (is->seek_req) {
2855             int64_t seek_target = is->seek_pos;
2856             int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2857             int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2858 // FIXME the +-2 is due to rounding being not done in the correct direction in generation
2859 //      of the seek_pos/seek_rel variables
2860
2861             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2862             if (ret < 0) {
2863                 av_log(NULL, AV_LOG_ERROR,
2864                        "%s: error while seeking\n", is->ic->filename);
2865             } else {
2866                 if (is->audio_stream >= 0) {
2867                     packet_queue_flush(&is->audioq);
2868                     packet_queue_put(&is->audioq, &flush_pkt);
2869                 }
2870                 if (is->subtitle_stream >= 0) {
2871                     packet_queue_flush(&is->subtitleq);
2872                     packet_queue_put(&is->subtitleq, &flush_pkt);
2873                 }
2874                 if (is->video_stream >= 0) {
2875                     packet_queue_flush(&is->videoq);
2876                     packet_queue_put(&is->videoq, &flush_pkt);
2877                 }
2878                 if (is->seek_flags & AVSEEK_FLAG_BYTE) {
2879                    set_clock(&is->extclk, NAN, 0);
2880                 } else {
2881                    set_clock(&is->extclk, seek_target / (double)AV_TIME_BASE, 0);
2882                 }
2883             }
2884             is->seek_req = 0;
2885             is->queue_attachments_req = 1;
2886             eof = 0;
2887             if (is->paused)
2888                 step_to_next_frame(is);
2889         }
2890         if (is->queue_attachments_req) {
2891             if (is->video_st && is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC) {
2892                 AVPacket copy;
2893                 if ((ret = av_copy_packet(&copy, &is->video_st->attached_pic)) < 0)
2894                     goto fail;
2895                 packet_queue_put(&is->videoq, &copy);
2896             }
2897             is->queue_attachments_req = 0;
2898         }
2899
2900         /* if the queue are full, no need to read more */
2901         if (infinite_buffer<1 &&
2902               (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2903             || (   (is->audioq   .nb_packets > MIN_FRAMES || is->audio_stream < 0 || is->audioq.abort_request)
2904                 && (is->videoq   .nb_packets > MIN_FRAMES || is->video_stream < 0 || is->videoq.abort_request
2905                     || (is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC))
2906                 && (is->subtitleq.nb_packets > MIN_FRAMES || is->subtitle_stream < 0 || is->subtitleq.abort_request)))) {
2907             /* wait 10 ms */
2908             SDL_LockMutex(wait_mutex);
2909             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2910             SDL_UnlockMutex(wait_mutex);
2911             continue;
2912         }
2913         if (!is->paused &&
2914             (!is->audio_st || is->audio_finished == is->audioq.serial) &&
2915             (!is->video_st || (is->video_finished == is->videoq.serial && is->pictq_size == 0))) {
2916             if (loop != 1 && (!loop || --loop)) {
2917                 stream_seek(is, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
2918             } else if (autoexit) {
2919                 ret = AVERROR_EOF;
2920                 goto fail;
2921             }
2922         }
2923         if (eof) {
2924             if (is->video_stream >= 0) {
2925                 av_init_packet(pkt);
2926                 pkt->data = NULL;
2927                 pkt->size = 0;
2928                 pkt->stream_index = is->video_stream;
2929                 packet_queue_put(&is->videoq, pkt);
2930             }
2931             if (is->audio_stream >= 0) {
2932                 av_init_packet(pkt);
2933                 pkt->data = NULL;
2934                 pkt->size = 0;
2935                 pkt->stream_index = is->audio_stream;
2936                 packet_queue_put(&is->audioq, pkt);
2937             }
2938             SDL_Delay(10);
2939             eof=0;
2940             continue;
2941         }
2942         ret = av_read_frame(ic, pkt);
2943         if (ret < 0) {
2944             if (ret == AVERROR_EOF || url_feof(ic->pb))
2945                 eof = 1;
2946             if (ic->pb && ic->pb->error)
2947                 break;
2948             SDL_LockMutex(wait_mutex);
2949             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2950             SDL_UnlockMutex(wait_mutex);
2951             continue;
2952         }
2953         /* check if packet is in play range specified by user, then queue, otherwise discard */
2954         stream_start_time = ic->streams[pkt->stream_index]->start_time;
2955         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
2956                 (pkt->pts - (stream_start_time != AV_NOPTS_VALUE ? stream_start_time : 0)) *
2957                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
2958                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
2959                 <= ((double)duration / 1000000);
2960         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
2961             packet_queue_put(&is->audioq, pkt);
2962         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range
2963                    && !(is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
2964             packet_queue_put(&is->videoq, pkt);
2965         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
2966             packet_queue_put(&is->subtitleq, pkt);
2967         } else {
2968             av_free_packet(pkt);
2969         }
2970     }
2971     /* wait until the end */
2972     while (!is->abort_request) {
2973         SDL_Delay(100);
2974     }
2975
2976     ret = 0;
2977  fail:
2978     /* close each stream */
2979     if (is->audio_stream >= 0)
2980         stream_component_close(is, is->audio_stream);
2981     if (is->video_stream >= 0)
2982         stream_component_close(is, is->video_stream);
2983     if (is->subtitle_stream >= 0)
2984         stream_component_close(is, is->subtitle_stream);
2985     if (is->ic) {
2986         avformat_close_input(&is->ic);
2987     }
2988
2989     if (ret != 0) {
2990         SDL_Event event;
2991
2992         event.type = FF_QUIT_EVENT;
2993         event.user.data1 = is;
2994         SDL_PushEvent(&event);
2995     }
2996     SDL_DestroyMutex(wait_mutex);
2997     return 0;
2998 }
2999
3000 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
3001 {
3002     VideoState *is;
3003
3004     is = av_mallocz(sizeof(VideoState));
3005     if (!is)
3006         return NULL;
3007     av_strlcpy(is->filename, filename, sizeof(is->filename));
3008     is->iformat = iformat;
3009     is->ytop    = 0;
3010     is->xleft   = 0;
3011
3012     /* start video display */
3013     is->pictq_mutex = SDL_CreateMutex();
3014     is->pictq_cond  = SDL_CreateCond();
3015
3016     is->subpq_mutex = SDL_CreateMutex();
3017     is->subpq_cond  = SDL_CreateCond();
3018
3019     packet_queue_init(&is->videoq);
3020     packet_queue_init(&is->audioq);
3021     packet_queue_init(&is->subtitleq);
3022
3023     is->continue_read_thread = SDL_CreateCond();
3024
3025     init_clock(&is->vidclk, &is->videoq.serial);
3026     init_clock(&is->audclk, &is->audioq.serial);
3027     init_clock(&is->extclk, &is->extclk.serial);
3028     is->audio_clock_serial = -1;
3029     is->audio_last_serial = -1;
3030     is->av_sync_type = av_sync_type;
3031     is->read_tid     = SDL_CreateThread(read_thread, is);
3032     if (!is->read_tid) {
3033         av_free(is);
3034         return NULL;
3035     }
3036     return is;
3037 }
3038
3039 static void stream_cycle_channel(VideoState *is, int codec_type)
3040 {
3041     AVFormatContext *ic = is->ic;
3042     int start_index, stream_index;
3043     int old_index;
3044     AVStream *st;
3045
3046     if (codec_type == AVMEDIA_TYPE_VIDEO) {
3047         start_index = is->last_video_stream;
3048         old_index = is->video_stream;
3049     } else if (codec_type == AVMEDIA_TYPE_AUDIO) {
3050         start_index = is->last_audio_stream;
3051         old_index = is->audio_stream;
3052     } else {
3053         start_index = is->last_subtitle_stream;
3054         old_index = is->subtitle_stream;
3055     }
3056     stream_index = start_index;
3057     for (;;) {
3058         if (++stream_index >= is->ic->nb_streams)
3059         {
3060             if (codec_type == AVMEDIA_TYPE_SUBTITLE)
3061             {
3062                 stream_index = -1;
3063                 is->last_subtitle_stream = -1;
3064                 goto the_end;
3065             }
3066             if (start_index == -1)
3067                 return;
3068             stream_index = 0;
3069         }
3070         if (stream_index == start_index)
3071             return;
3072         st = ic->streams[stream_index];
3073         if (st->codec->codec_type == codec_type) {
3074             /* check that parameters are OK */
3075             switch (codec_type) {
3076             case AVMEDIA_TYPE_AUDIO:
3077                 if (st->codec->sample_rate != 0 &&
3078                     st->codec->channels != 0)
3079                     goto the_end;
3080                 break;
3081             case AVMEDIA_TYPE_VIDEO:
3082             case AVMEDIA_TYPE_SUBTITLE:
3083                 goto the_end;
3084             default:
3085                 break;
3086             }
3087         }
3088     }
3089  the_end:
3090     stream_component_close(is, old_index);
3091     stream_component_open(is, stream_index);
3092 }
3093
3094
3095 static void toggle_full_screen(VideoState *is)
3096 {
3097 #if defined(__APPLE__) && SDL_VERSION_ATLEAST(1, 2, 14)
3098     /* OS X needs to reallocate the SDL overlays */
3099     int i;
3100     for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++)
3101         is->pictq[i].reallocate = 1;
3102 #endif
3103     is_full_screen = !is_full_screen;
3104     video_open(is, 1, NULL);
3105 }
3106
3107 static void toggle_audio_display(VideoState *is)
3108 {
3109     int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
3110     int next = is->show_mode;
3111     do {
3112         next = (next + 1) % SHOW_MODE_NB;
3113     } while (next != is->show_mode && (next == SHOW_MODE_VIDEO && !is->video_st || next != SHOW_MODE_VIDEO && !is->audio_st));
3114     if (is->show_mode != next) {
3115         fill_rectangle(screen,
3116                     is->xleft, is->ytop, is->width, is->height,
3117                     bgcolor, 1);
3118         is->force_refresh = 1;
3119         is->show_mode = next;
3120     }
3121 }
3122
3123 static void refresh_loop_wait_event(VideoState *is, SDL_Event *event) {
3124     double remaining_time = 0.0;
3125     SDL_PumpEvents();
3126     while (!SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS)) {
3127         if (!cursor_hidden && av_gettime() - cursor_last_shown > CURSOR_HIDE_DELAY) {
3128             SDL_ShowCursor(0);
3129             cursor_hidden = 1;
3130         }
3131         if (remaining_time > 0.0)
3132             av_usleep((int64_t)(remaining_time * 1000000.0));
3133         remaining_time = REFRESH_RATE;
3134         if (is->show_mode != SHOW_MODE_NONE && (!is->paused || is->force_refresh))
3135             video_refresh(is, &remaining_time);
3136         SDL_PumpEvents();
3137     }
3138 }
3139
3140 /* handle an event sent by the GUI */
3141 static void event_loop(VideoState *cur_stream)
3142 {
3143     SDL_Event event;
3144     double incr, pos, frac;
3145
3146     for (;;) {
3147         double x;
3148         refresh_loop_wait_event(cur_stream, &event);
3149         switch (event.type) {
3150         case SDL_KEYDOWN:
3151             if (exit_on_keydown) {
3152                 do_exit(cur_stream);
3153                 break;
3154             }
3155             switch (event.key.keysym.sym) {
3156             case SDLK_ESCAPE:
3157             case SDLK_q:
3158                 do_exit(cur_stream);
3159                 break;
3160             case SDLK_f:
3161                 toggle_full_screen(cur_stream);
3162                 cur_stream->force_refresh = 1;
3163                 break;
3164             case SDLK_p:
3165             case SDLK_SPACE:
3166                 toggle_pause(cur_stream);
3167                 break;
3168             case SDLK_s: // S: Step to next frame
3169                 step_to_next_frame(cur_stream);
3170                 break;
3171             case SDLK_a:
3172                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3173                 break;
3174             case SDLK_v:
3175                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3176                 break;
3177             case SDLK_t:
3178                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3179                 break;
3180             case SDLK_w:
3181                 toggle_audio_display(cur_stream);
3182                 break;
3183             case SDLK_PAGEUP:
3184                 incr = 600.0;
3185                 goto do_seek;
3186             case SDLK_PAGEDOWN:
3187                 incr = -600.0;
3188                 goto do_seek;
3189             case SDLK_LEFT:
3190                 incr = -10.0;
3191                 goto do_seek;
3192             case SDLK_RIGHT:
3193                 incr = 10.0;
3194                 goto do_seek;
3195             case SDLK_UP:
3196                 incr = 60.0;
3197                 goto do_seek;
3198             case SDLK_DOWN:
3199                 incr = -60.0;
3200             do_seek:
3201                     if (seek_by_bytes) {
3202                         if (cur_stream->video_stream >= 0 && cur_stream->video_current_pos >= 0) {
3203                             pos = cur_stream->video_current_pos;
3204                         } else if (cur_stream->audio_stream >= 0 && cur_stream->audio_pkt.pos >= 0) {
3205                             pos = cur_stream->audio_pkt.pos;
3206                         } else
3207                             pos = avio_tell(cur_stream->ic->pb);
3208                         if (cur_stream->ic->bit_rate)
3209                             incr *= cur_stream->ic->bit_rate / 8.0;
3210                         else
3211                             incr *= 180000.0;
3212                         pos += incr;
3213                         stream_seek(cur_stream, pos, incr, 1);
3214                     } else {
3215                         pos = get_master_clock(cur_stream);
3216                         if (isnan(pos))
3217                             pos = (double)cur_stream->seek_pos / AV_TIME_BASE;
3218                         pos += incr;
3219                         if (cur_stream->ic->start_time != AV_NOPTS_VALUE && pos < cur_stream->ic->start_time / (double)AV_TIME_BASE)
3220                             pos = cur_stream->ic->start_time / (double)AV_TIME_BASE;
3221                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
3222                     }
3223                 break;
3224             default:
3225                 break;
3226             }
3227             break;
3228         case SDL_VIDEOEXPOSE:
3229             cur_stream->force_refresh = 1;
3230             break;
3231         case SDL_MOUSEBUTTONDOWN:
3232             if (exit_on_mousedown) {
3233                 do_exit(cur_stream);
3234                 break;
3235             }
3236         case SDL_MOUSEMOTION:
3237             if (cursor_hidden) {
3238                 SDL_ShowCursor(1);
3239                 cursor_hidden = 0;
3240             }
3241             cursor_last_shown = av_gettime();
3242             if (event.type == SDL_MOUSEBUTTONDOWN) {
3243                 x = event.button.x;
3244             } else {
3245                 if (event.motion.state != SDL_PRESSED)
3246                     break;
3247                 x = event.motion.x;
3248             }
3249                 if (seek_by_bytes || cur_stream->ic->duration <= 0) {
3250                     uint64_t size =  avio_size(cur_stream->ic->pb);
3251                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
3252                 } else {
3253                     int64_t ts;
3254                     int ns, hh, mm, ss;
3255                     int tns, thh, tmm, tss;
3256                     tns  = cur_stream->ic->duration / 1000000LL;
3257                     thh  = tns / 3600;
3258                     tmm  = (tns % 3600) / 60;
3259                     tss  = (tns % 60);
3260                     frac = x / cur_stream->width;
3261                     ns   = frac * tns;
3262                     hh   = ns / 3600;
3263                     mm   = (ns % 3600) / 60;
3264                     ss   = (ns % 60);
3265                     av_log(NULL, AV_LOG_INFO,
3266                            "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
3267                             hh, mm, ss, thh, tmm, tss);
3268                     ts = frac * cur_stream->ic->duration;
3269                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
3270                         ts += cur_stream->ic->start_time;
3271                     stream_seek(cur_stream, ts, 0, 0);
3272                 }
3273             break;
3274         case SDL_VIDEORESIZE:
3275                 screen = SDL_SetVideoMode(FFMIN(16383, event.resize.w), event.resize.h, 0,
3276                                           SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
3277                 if (!screen) {
3278                     av_log(NULL, AV_LOG_FATAL, "Failed to set video mode\n");
3279                     do_exit(cur_stream);
3280                 }
3281                 screen_width  = cur_stream->width  = screen->w;
3282                 screen_height = cur_stream->height = screen->h;
3283                 cur_stream->force_refresh = 1;
3284             break;
3285         case SDL_QUIT:
3286         case FF_QUIT_EVENT:
3287             do_exit(cur_stream);
3288             break;
3289         case FF_ALLOC_EVENT:
3290             alloc_picture(event.user.data1);
3291             break;
3292         default:
3293             break;
3294         }
3295     }
3296 }
3297
3298 static int opt_frame_size(void *optctx, const char *opt, const char *arg)
3299 {
3300     av_log(NULL, AV_LOG_WARNING, "Option -s is deprecated, use -video_size.\n");
3301     return opt_default(NULL, "video_size", arg);
3302 }
3303
3304 static int opt_width(void *optctx, const char *opt, const char *arg)
3305 {
3306     screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3307     return 0;
3308 }
3309
3310 static int opt_height(void *optctx, const char *opt, const char *arg)
3311 {
3312     screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3313     return 0;
3314 }
3315
3316 static int opt_format(void *optctx, const char *opt, const char *arg)
3317 {
3318     file_iformat = av_find_input_format(arg);
3319     if (!file_iformat) {
3320         av_log(NULL, AV_LOG_FATAL, "Unknown input format: %s\n", arg);
3321         return AVERROR(EINVAL);
3322     }
3323     return 0;
3324 }
3325
3326 static int opt_frame_pix_fmt(void *optctx, const char *opt, const char *arg)
3327 {
3328     av_log(NULL, AV_LOG_WARNING, "Option -pix_fmt is deprecated, use -pixel_format.\n");
3329     return opt_default(NULL, "pixel_format", arg);
3330 }
3331
3332 static int opt_sync(void *optctx, const char *opt, const char *arg)
3333 {
3334     if (!strcmp(arg, "audio"))
3335         av_sync_type = AV_SYNC_AUDIO_MASTER;
3336     else if (!strcmp(arg, "video"))
3337         av_sync_type = AV_SYNC_VIDEO_MASTER;
3338     else if (!strcmp(arg, "ext"))
3339         av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
3340     else {
3341         av_log(NULL, AV_LOG_ERROR, "Unknown value for %s: %s\n", opt, arg);
3342         exit(1);
3343     }
3344     return 0;
3345 }
3346
3347 static int opt_seek(void *optctx, const char *opt, const char *arg)
3348 {
3349     start_time = parse_time_or_die(opt, arg, 1);
3350     return 0;
3351 }
3352
3353 static int opt_duration(void *optctx, const char *opt, const char *arg)
3354 {
3355     duration = parse_time_or_die(opt, arg, 1);
3356     return 0;
3357 }
3358
3359 static int opt_show_mode(void *optctx, const char *opt, const char *arg)
3360 {
3361     show_mode = !strcmp(arg, "video") ? SHOW_MODE_VIDEO :
3362                 !strcmp(arg, "waves") ? SHOW_MODE_WAVES :
3363                 !strcmp(arg, "rdft" ) ? SHOW_MODE_RDFT  :
3364                 parse_number_or_die(opt, arg, OPT_INT, 0, SHOW_MODE_NB-1);
3365     return 0;
3366 }
3367
3368 static void opt_input_file(void *optctx, const char *filename)
3369 {
3370     if (input_filename) {
3371         av_log(NULL, AV_LOG_FATAL,
3372                "Argument '%s' provided as input filename, but '%s' was already specified.\n",
3373                 filename, input_filename);
3374         exit(1);
3375     }
3376     if (!strcmp(filename, "-"))
3377         filename = "pipe:";
3378     input_filename = filename;
3379 }
3380
3381 static int opt_codec(void *optctx, const char *opt, const char *arg)
3382 {
3383    const char *spec = strchr(opt, ':');
3384    if (!spec) {
3385        av_log(NULL, AV_LOG_ERROR,
3386               "No media specifier was specified in '%s' in option '%s'\n",
3387                arg, opt);
3388        return AVERROR(EINVAL);
3389    }
3390    spec++;
3391    switch (spec[0]) {
3392    case 'a' :    audio_codec_name = arg; break;
3393    case 's' : subtitle_codec_name = arg; break;
3394    case 'v' :    video_codec_name = arg; break;
3395    default:
3396        av_log(NULL, AV_LOG_ERROR,
3397               "Invalid media specifier '%s' in option '%s'\n", spec, opt);
3398        return AVERROR(EINVAL);
3399    }
3400    return 0;
3401 }
3402
3403 static int dummy;
3404
3405 static const OptionDef options[] = {
3406 #include "cmdutils_common_opts.h"
3407     { "x", HAS_ARG, { .func_arg = opt_width }, "force displayed width", "width" },
3408     { "y", HAS_ARG, { .func_arg = opt_height }, "force displayed height", "height" },
3409     { "s", HAS_ARG | OPT_VIDEO, { .func_arg = opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
3410     { "fs", OPT_BOOL, { &is_full_screen }, "force full screen" },
3411     { "an", OPT_BOOL, { &audio_disable }, "disable audio" },
3412     { "vn", OPT_BOOL, { &video_disable }, "disable video" },
3413     { "sn", OPT_BOOL, { &subtitle_disable }, "disable subtitling" },
3414     { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_number" },
3415     { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_number" },
3416     { "sst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_number" },
3417     { "ss", HAS_ARG, { .func_arg = opt_seek }, "seek to a given position in seconds", "pos" },
3418     { "t", HAS_ARG, { .func_arg = opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
3419     { "bytes", OPT_INT | HAS_ARG, { &seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
3420     { "nodisp", OPT_BOOL, { &display_disable }, "disable graphical display" },
3421     { "f", HAS_ARG, { .func_arg = opt_format }, "force format", "fmt" },
3422     { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_frame_pix_fmt }, "set pixel format", "format" },
3423     { "stats", OPT_BOOL | OPT_EXPERT, { &show_status }, "show status", "" },
3424     { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, { &workaround_bugs }, "workaround bugs", "" },
3425     { "fast", OPT_BOOL | OPT_EXPERT, { &fast }, "non spec compliant optimizations", "" },
3426     { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
3427     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
3428     { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, { &lowres }, "", "" },
3429     { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, { &error_concealment }, "set error concealment options",  "bit_mask" },
3430     { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
3431     { "autoexit", OPT_BOOL | OPT_EXPERT, { &autoexit }, "exit at the end", "" },
3432     { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { &exit_on_keydown }, "exit on key down", "" },
3433     { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { &exit_on_mousedown }, "exit on mouse down", "" },
3434     { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { &loop }, "set number of times the playback shall be looped", "loop count" },
3435     { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
3436     { "infbuf", OPT_BOOL | OPT_EXPERT, { &infinite_buffer }, "don't limit the input buffer size (useful with realtime streams)", "" },
3437     { "window_title", OPT_STRING | HAS_ARG, { &window_title }, "set window title", "window title" },
3438 #if CONFIG_AVFILTER
3439     { "vf", OPT_STRING | HAS_ARG, { &vfilters }, "set video filters", "filter_graph" },
3440     { "af", OPT_STRING | HAS_ARG, { &afilters }, "set audio filters", "filter_graph" },
3441 #endif
3442     { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { &rdftspeed }, "rdft speed", "msecs" },
3443     { "showmode", HAS_ARG, { .func_arg = opt_show_mode}, "select show mode (0 = video, 1 = waves, 2 = RDFT)", "mode" },
3444     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { .func_arg = opt_default }, "generic catch all option", "" },
3445     { "i", OPT_BOOL, { &dummy}, "read specified file", "input_file"},
3446     { "codec", HAS_ARG, { .func_arg = opt_codec}, "force decoder", "decoder_name" },
3447     { "acodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &audio_codec_name }, "force audio decoder",    "decoder_name" },
3448     { "scodec", HAS_ARG | OPT_STRING | OPT_EXPERT, { &subtitle_codec_name }, "force subtitle decoder", "decoder_name" },
3449     { "vcodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &video_codec_name }, "force video decoder",    "decoder_name" },
3450     { NULL, },
3451 };
3452
3453 static void show_usage(void)
3454 {
3455     av_log(NULL, AV_LOG_INFO, "Simple media player\n");
3456     av_log(NULL, AV_LOG_INFO, "usage: %s [options] input_file\n", program_name);
3457     av_log(NULL, AV_LOG_INFO, "\n");
3458 }
3459
3460 void show_help_default(const char *opt, const char *arg)
3461 {
3462     av_log_set_callback(log_callback_help);
3463     show_usage();
3464     show_help_options(options, "Main options:", 0, OPT_EXPERT, 0);
3465     show_help_options(options, "Advanced options:", OPT_EXPERT, 0, 0);
3466     printf("\n");
3467     show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3468     show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3469 #if !CONFIG_AVFILTER
3470     show_help_children(sws_get_class(), AV_OPT_FLAG_ENCODING_PARAM);
3471 #else
3472     show_help_children(avfilter_get_class(), AV_OPT_FLAG_FILTERING_PARAM);
3473 #endif
3474     printf("\nWhile playing:\n"
3475            "q, ESC              quit\n"
3476            "f                   toggle full screen\n"
3477            "p, SPC              pause\n"
3478            "a                   cycle audio channel\n"
3479            "v                   cycle video channel\n"
3480            "t                   cycle subtitle channel\n"
3481            "w                   show audio waves\n"
3482            "s                   activate frame-step mode\n"
3483            "left/right          seek backward/forward 10 seconds\n"
3484            "down/up             seek backward/forward 1 minute\n"
3485            "page down/page up   seek backward/forward 10 minutes\n"
3486            "mouse click         seek to percentage in file corresponding to fraction of width\n"
3487            );
3488 }
3489
3490 static int lockmgr(void **mtx, enum AVLockOp op)
3491 {
3492    switch(op) {
3493       case AV_LOCK_CREATE:
3494           *mtx = SDL_CreateMutex();
3495           if(!*mtx)
3496               return 1;
3497           return 0;
3498       case AV_LOCK_OBTAIN:
3499           return !!SDL_LockMutex(*mtx);
3500       case AV_LOCK_RELEASE:
3501           return !!SDL_UnlockMutex(*mtx);
3502       case AV_LOCK_DESTROY:
3503           SDL_DestroyMutex(*mtx);
3504           return 0;
3505    }
3506    return 1;
3507 }
3508
3509 /* Called from the main */
3510 int main(int argc, char **argv)
3511 {
3512     int flags;
3513     VideoState *is;
3514     char dummy_videodriver[] = "SDL_VIDEODRIVER=dummy";
3515
3516     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3517     parse_loglevel(argc, argv, options);
3518
3519     /* register all codecs, demux and protocols */
3520     avcodec_register_all();
3521 #if CONFIG_AVDEVICE
3522     avdevice_register_all();
3523 #endif
3524 #if CONFIG_AVFILTER
3525     avfilter_register_all();
3526 #endif
3527     av_register_all();
3528     avformat_network_init();
3529
3530     init_opts();
3531
3532     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
3533     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
3534
3535     show_banner(argc, argv, options);
3536
3537     parse_options(NULL, argc, argv, options, opt_input_file);
3538
3539     if (!input_filename) {
3540         show_usage();
3541         av_log(NULL, AV_LOG_FATAL, "An input file must be specified\n");
3542         av_log(NULL, AV_LOG_FATAL,
3543                "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3544         exit(1);
3545     }
3546
3547     if (display_disable) {
3548         video_disable = 1;
3549     }
3550     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
3551     if (audio_disable)
3552         flags &= ~SDL_INIT_AUDIO;
3553     if (display_disable)
3554         SDL_putenv(dummy_videodriver); /* For the event queue, we always need a video driver. */
3555 #if !defined(__MINGW32__) && !defined(__APPLE__)
3556     flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */
3557 #endif
3558     if (SDL_Init (flags)) {
3559         av_log(NULL, AV_LOG_FATAL, "Could not initialize SDL - %s\n", SDL_GetError());
3560         av_log(NULL, AV_LOG_FATAL, "(Did you set the DISPLAY variable?)\n");
3561         exit(1);
3562     }
3563
3564     if (!display_disable) {
3565         const SDL_VideoInfo *vi = SDL_GetVideoInfo();
3566         fs_screen_width = vi->current_w;
3567         fs_screen_height = vi->current_h;
3568     }
3569
3570     SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
3571     SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
3572     SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
3573
3574     if (av_lockmgr_register(lockmgr)) {
3575         av_log(NULL, AV_LOG_FATAL, "Could not initialize lock manager!\n");
3576         do_exit(NULL);
3577     }
3578
3579     av_init_packet(&flush_pkt);
3580     flush_pkt.data = (uint8_t *)&flush_pkt;
3581
3582     is = stream_open(input_filename, file_iformat);
3583     if (!is) {
3584         av_log(NULL, AV_LOG_FATAL, "Failed to initialize VideoState!\n");
3585         do_exit(NULL);
3586     }
3587
3588     event_loop(is);
3589
3590     /* never returns */
3591
3592     return 0;
3593 }