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                 ret = 0;
1960                 break;
1961             }
1962
1963             is->frame_last_filter_delay = av_gettime() / 1000000.0 - is->frame_last_returned_time;
1964             if (fabs(is->frame_last_filter_delay) > AV_NOSYNC_THRESHOLD / 10.0)
1965                 is->frame_last_filter_delay = 0;
1966
1967             pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(filt_out->inputs[0]->time_base);
1968             ret = queue_picture(is, frame, pts, av_frame_get_pkt_pos(frame), serial);
1969             av_frame_unref(frame);
1970         }
1971 #else
1972         pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(is->video_st->time_base);
1973         ret = queue_picture(is, frame, pts, pkt.pos, serial);
1974         av_frame_unref(frame);
1975 #endif
1976
1977         if (ret < 0)
1978             goto the_end;
1979     }
1980  the_end:
1981     avcodec_flush_buffers(is->video_st->codec);
1982 #if CONFIG_AVFILTER
1983     avfilter_graph_free(&graph);
1984 #endif
1985     av_free_packet(&pkt);
1986     av_frame_free(&frame);
1987     return 0;
1988 }
1989
1990 static int subtitle_thread(void *arg)
1991 {
1992     VideoState *is = arg;
1993     SubPicture *sp;
1994     AVPacket pkt1, *pkt = &pkt1;
1995     int got_subtitle;
1996     int serial;
1997     double pts;
1998     int i, j;
1999     int r, g, b, y, u, v, a;
2000
2001     for (;;) {
2002         while (is->paused && !is->subtitleq.abort_request) {
2003             SDL_Delay(10);
2004         }
2005         if (packet_queue_get(&is->subtitleq, pkt, 1, &serial) < 0)
2006             break;
2007
2008         if (pkt->data == flush_pkt.data) {
2009             avcodec_flush_buffers(is->subtitle_st->codec);
2010             continue;
2011         }
2012         SDL_LockMutex(is->subpq_mutex);
2013         while (is->subpq_size >= SUBPICTURE_QUEUE_SIZE &&
2014                !is->subtitleq.abort_request) {
2015             SDL_CondWait(is->subpq_cond, is->subpq_mutex);
2016         }
2017         SDL_UnlockMutex(is->subpq_mutex);
2018
2019         if (is->subtitleq.abort_request)
2020             return 0;
2021
2022         sp = &is->subpq[is->subpq_windex];
2023
2024        /* NOTE: ipts is the PTS of the _first_ picture beginning in
2025            this packet, if any */
2026         pts = 0;
2027         if (pkt->pts != AV_NOPTS_VALUE)
2028             pts = av_q2d(is->subtitle_st->time_base) * pkt->pts;
2029
2030         avcodec_decode_subtitle2(is->subtitle_st->codec, &sp->sub,
2031                                  &got_subtitle, pkt);
2032         if (got_subtitle && sp->sub.format == 0) {
2033             if (sp->sub.pts != AV_NOPTS_VALUE)
2034                 pts = sp->sub.pts / (double)AV_TIME_BASE;
2035             sp->pts = pts;
2036             sp->serial = serial;
2037
2038             for (i = 0; i < sp->sub.num_rects; i++)
2039             {
2040                 for (j = 0; j < sp->sub.rects[i]->nb_colors; j++)
2041                 {
2042                     RGBA_IN(r, g, b, a, (uint32_t*)sp->sub.rects[i]->pict.data[1] + j);
2043                     y = RGB_TO_Y_CCIR(r, g, b);
2044                     u = RGB_TO_U_CCIR(r, g, b, 0);
2045                     v = RGB_TO_V_CCIR(r, g, b, 0);
2046                     YUVA_OUT((uint32_t*)sp->sub.rects[i]->pict.data[1] + j, y, u, v, a);
2047                 }
2048             }
2049
2050             /* now we can update the picture count */
2051             if (++is->subpq_windex == SUBPICTURE_QUEUE_SIZE)
2052                 is->subpq_windex = 0;
2053             SDL_LockMutex(is->subpq_mutex);
2054             is->subpq_size++;
2055             SDL_UnlockMutex(is->subpq_mutex);
2056         } else if (got_subtitle) {
2057             avsubtitle_free(&sp->sub);
2058         }
2059         av_free_packet(pkt);
2060     }
2061     return 0;
2062 }
2063
2064 /* copy samples for viewing in editor window */
2065 static void update_sample_display(VideoState *is, short *samples, int samples_size)
2066 {
2067     int size, len;
2068
2069     size = samples_size / sizeof(short);
2070     while (size > 0) {
2071         len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
2072         if (len > size)
2073             len = size;
2074         memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
2075         samples += len;
2076         is->sample_array_index += len;
2077         if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
2078             is->sample_array_index = 0;
2079         size -= len;
2080     }
2081 }
2082
2083 /* return the wanted number of samples to get better sync if sync_type is video
2084  * or external master clock */
2085 static int synchronize_audio(VideoState *is, int nb_samples)
2086 {
2087     int wanted_nb_samples = nb_samples;
2088
2089     /* if not master, then we try to remove or add samples to correct the clock */
2090     if (get_master_sync_type(is) != AV_SYNC_AUDIO_MASTER) {
2091         double diff, avg_diff;
2092         int min_nb_samples, max_nb_samples;
2093
2094         diff = get_clock(&is->audclk) - get_master_clock(is);
2095
2096         if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD) {
2097             is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
2098             if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
2099                 /* not enough measures to have a correct estimate */
2100                 is->audio_diff_avg_count++;
2101             } else {
2102                 /* estimate the A-V difference */
2103                 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
2104
2105                 if (fabs(avg_diff) >= is->audio_diff_threshold) {
2106                     wanted_nb_samples = nb_samples + (int)(diff * is->audio_src.freq);
2107                     min_nb_samples = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2108                     max_nb_samples = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2109                     wanted_nb_samples = FFMIN(FFMAX(wanted_nb_samples, min_nb_samples), max_nb_samples);
2110                 }
2111                 av_dlog(NULL, "diff=%f adiff=%f sample_diff=%d apts=%0.3f %f\n",
2112                         diff, avg_diff, wanted_nb_samples - nb_samples,
2113                         is->audio_clock, is->audio_diff_threshold);
2114             }
2115         } else {
2116             /* too big difference : may be initial PTS errors, so
2117                reset A-V filter */
2118             is->audio_diff_avg_count = 0;
2119             is->audio_diff_cum       = 0;
2120         }
2121     }
2122
2123     return wanted_nb_samples;
2124 }
2125
2126 /**
2127  * Decode one audio frame and return its uncompressed size.
2128  *
2129  * The processed audio frame is decoded, converted if required, and
2130  * stored in is->audio_buf, with size in bytes given by the return
2131  * value.
2132  */
2133 static int audio_decode_frame(VideoState *is)
2134 {
2135     AVPacket *pkt_temp = &is->audio_pkt_temp;
2136     AVPacket *pkt = &is->audio_pkt;
2137     AVCodecContext *dec = is->audio_st->codec;
2138     int len1, data_size, resampled_data_size;
2139     int64_t dec_channel_layout;
2140     int got_frame;
2141     av_unused double audio_clock0;
2142     int wanted_nb_samples;
2143     AVRational tb;
2144     int ret;
2145     int reconfigure;
2146
2147     for (;;) {
2148         /* NOTE: the audio packet can contain several frames */
2149         while (pkt_temp->stream_index != -1 || is->audio_buf_frames_pending) {
2150             if (!is->frame) {
2151                 if (!(is->frame = avcodec_alloc_frame()))
2152                     return AVERROR(ENOMEM);
2153             } else {
2154                 av_frame_unref(is->frame);
2155                 avcodec_get_frame_defaults(is->frame);
2156             }
2157
2158             if (is->audioq.serial != is->audio_pkt_temp_serial)
2159                 break;
2160
2161             if (is->paused)
2162                 return -1;
2163
2164             if (!is->audio_buf_frames_pending) {
2165                 len1 = avcodec_decode_audio4(dec, is->frame, &got_frame, pkt_temp);
2166                 if (len1 < 0) {
2167                     /* if error, we skip the frame */
2168                     pkt_temp->size = 0;
2169                     break;
2170                 }
2171
2172                 pkt_temp->dts =
2173                 pkt_temp->pts = AV_NOPTS_VALUE;
2174                 pkt_temp->data += len1;
2175                 pkt_temp->size -= len1;
2176                 if (pkt_temp->data && pkt_temp->size <= 0 || !pkt_temp->data && !got_frame)
2177                     pkt_temp->stream_index = -1;
2178                 if (!pkt_temp->data && !got_frame)
2179                     is->audio_finished = is->audio_pkt_temp_serial;
2180
2181                 if (!got_frame)
2182                     continue;
2183
2184                 tb = (AVRational){1, is->frame->sample_rate};
2185                 if (is->frame->pts != AV_NOPTS_VALUE)
2186                     is->frame->pts = av_rescale_q(is->frame->pts, dec->time_base, tb);
2187                 else if (is->frame->pkt_pts != AV_NOPTS_VALUE)
2188                     is->frame->pts = av_rescale_q(is->frame->pkt_pts, is->audio_st->time_base, tb);
2189                 else if (is->audio_frame_next_pts != AV_NOPTS_VALUE)
2190 #if CONFIG_AVFILTER
2191                     is->frame->pts = av_rescale_q(is->audio_frame_next_pts, (AVRational){1, is->audio_filter_src.freq}, tb);
2192 #else
2193                     is->frame->pts = av_rescale_q(is->audio_frame_next_pts, (AVRational){1, is->audio_src.freq}, tb);
2194 #endif
2195
2196                 if (is->frame->pts != AV_NOPTS_VALUE)
2197                     is->audio_frame_next_pts = is->frame->pts + is->frame->nb_samples;
2198
2199 #if CONFIG_AVFILTER
2200                 dec_channel_layout = get_valid_channel_layout(is->frame->channel_layout, av_frame_get_channels(is->frame));
2201
2202                 reconfigure =
2203                     cmp_audio_fmts(is->audio_filter_src.fmt, is->audio_filter_src.channels,
2204                                    is->frame->format, av_frame_get_channels(is->frame))    ||
2205                     is->audio_filter_src.channel_layout != dec_channel_layout ||
2206                     is->audio_filter_src.freq           != is->frame->sample_rate ||
2207                     is->audio_pkt_temp_serial           != is->audio_last_serial;
2208
2209                 if (reconfigure) {
2210                     char buf1[1024], buf2[1024];
2211                     av_get_channel_layout_string(buf1, sizeof(buf1), -1, is->audio_filter_src.channel_layout);
2212                     av_get_channel_layout_string(buf2, sizeof(buf2), -1, dec_channel_layout);
2213                     av_log(NULL, AV_LOG_DEBUG,
2214                            "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",
2215                            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,
2216                            is->frame->sample_rate, av_frame_get_channels(is->frame), av_get_sample_fmt_name(is->frame->format), buf2, is->audio_pkt_temp_serial);
2217
2218                     is->audio_filter_src.fmt            = is->frame->format;
2219                     is->audio_filter_src.channels       = av_frame_get_channels(is->frame);
2220                     is->audio_filter_src.channel_layout = dec_channel_layout;
2221                     is->audio_filter_src.freq           = is->frame->sample_rate;
2222                     is->audio_last_serial               = is->audio_pkt_temp_serial;
2223
2224                     if ((ret = configure_audio_filters(is, afilters, 1)) < 0)
2225                         return ret;
2226                 }
2227
2228                 if ((ret = av_buffersrc_add_frame(is->in_audio_filter, is->frame)) < 0)
2229                     return ret;
2230                 av_frame_unref(is->frame);
2231 #endif
2232             }
2233 #if CONFIG_AVFILTER
2234             if ((ret = av_buffersink_get_frame_flags(is->out_audio_filter, is->frame, 0)) < 0) {
2235                 if (ret == AVERROR(EAGAIN)) {
2236                     is->audio_buf_frames_pending = 0;
2237                     continue;
2238                 }
2239                 return ret;
2240             }
2241             is->audio_buf_frames_pending = 1;
2242             tb = is->out_audio_filter->inputs[0]->time_base;
2243 #endif
2244
2245             data_size = av_samples_get_buffer_size(NULL, av_frame_get_channels(is->frame),
2246                                                    is->frame->nb_samples,
2247                                                    is->frame->format, 1);
2248
2249             dec_channel_layout =
2250                 (is->frame->channel_layout && av_frame_get_channels(is->frame) == av_get_channel_layout_nb_channels(is->frame->channel_layout)) ?
2251                 is->frame->channel_layout : av_get_default_channel_layout(av_frame_get_channels(is->frame));
2252             wanted_nb_samples = synchronize_audio(is, is->frame->nb_samples);
2253
2254             if (is->frame->format        != is->audio_src.fmt            ||
2255                 dec_channel_layout       != is->audio_src.channel_layout ||
2256                 is->frame->sample_rate   != is->audio_src.freq           ||
2257                 (wanted_nb_samples       != is->frame->nb_samples && !is->swr_ctx)) {
2258                 swr_free(&is->swr_ctx);
2259                 is->swr_ctx = swr_alloc_set_opts(NULL,
2260                                                  is->audio_tgt.channel_layout, is->audio_tgt.fmt, is->audio_tgt.freq,
2261                                                  dec_channel_layout,           is->frame->format, is->frame->sample_rate,
2262                                                  0, NULL);
2263                 if (!is->swr_ctx || swr_init(is->swr_ctx) < 0) {
2264                     av_log(NULL, AV_LOG_ERROR,
2265                            "Cannot create sample rate converter for conversion of %d Hz %s %d channels to %d Hz %s %d channels!\n",
2266                             is->frame->sample_rate, av_get_sample_fmt_name(is->frame->format), av_frame_get_channels(is->frame),
2267                             is->audio_tgt.freq, av_get_sample_fmt_name(is->audio_tgt.fmt), is->audio_tgt.channels);
2268                     break;
2269                 }
2270                 is->audio_src.channel_layout = dec_channel_layout;
2271                 is->audio_src.channels       = av_frame_get_channels(is->frame);
2272                 is->audio_src.freq = is->frame->sample_rate;
2273                 is->audio_src.fmt = is->frame->format;
2274             }
2275
2276             if (is->swr_ctx) {
2277                 const uint8_t **in = (const uint8_t **)is->frame->extended_data;
2278                 uint8_t **out = &is->audio_buf1;
2279                 int out_count = (int64_t)wanted_nb_samples * is->audio_tgt.freq / is->frame->sample_rate + 256;
2280                 int out_size  = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, out_count, is->audio_tgt.fmt, 0);
2281                 int len2;
2282                 if (out_size < 0) {
2283                     av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size() failed\n");
2284                     break;
2285                 }
2286                 if (wanted_nb_samples != is->frame->nb_samples) {
2287                     if (swr_set_compensation(is->swr_ctx, (wanted_nb_samples - is->frame->nb_samples) * is->audio_tgt.freq / is->frame->sample_rate,
2288                                                 wanted_nb_samples * is->audio_tgt.freq / is->frame->sample_rate) < 0) {
2289                         av_log(NULL, AV_LOG_ERROR, "swr_set_compensation() failed\n");
2290                         break;
2291                     }
2292                 }
2293                 av_fast_malloc(&is->audio_buf1, &is->audio_buf1_size, out_size);
2294                 if (!is->audio_buf1)
2295                     return AVERROR(ENOMEM);
2296                 len2 = swr_convert(is->swr_ctx, out, out_count, in, is->frame->nb_samples);
2297                 if (len2 < 0) {
2298                     av_log(NULL, AV_LOG_ERROR, "swr_convert() failed\n");
2299                     break;
2300                 }
2301                 if (len2 == out_count) {
2302                     av_log(NULL, AV_LOG_WARNING, "audio buffer is probably too small\n");
2303                     swr_init(is->swr_ctx);
2304                 }
2305                 is->audio_buf = is->audio_buf1;
2306                 resampled_data_size = len2 * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2307             } else {
2308                 is->audio_buf = is->frame->data[0];
2309                 resampled_data_size = data_size;
2310             }
2311
2312             audio_clock0 = is->audio_clock;
2313             /* update the audio clock with the pts */
2314             if (is->frame->pts != AV_NOPTS_VALUE)
2315                 is->audio_clock = is->frame->pts * av_q2d(tb) + (double) is->frame->nb_samples / is->frame->sample_rate;
2316             else
2317                 is->audio_clock = NAN;
2318             is->audio_clock_serial = is->audio_pkt_temp_serial;
2319 #ifdef DEBUG
2320             {
2321                 static double last_clock;
2322                 printf("audio: delay=%0.3f clock=%0.3f clock0=%0.3f\n",
2323                        is->audio_clock - last_clock,
2324                        is->audio_clock, audio_clock0);
2325                 last_clock = is->audio_clock;
2326             }
2327 #endif
2328             return resampled_data_size;
2329         }
2330
2331         /* free the current packet */
2332         if (pkt->data)
2333             av_free_packet(pkt);
2334         memset(pkt_temp, 0, sizeof(*pkt_temp));
2335         pkt_temp->stream_index = -1;
2336
2337         if (is->audioq.abort_request) {
2338             return -1;
2339         }
2340
2341         if (is->audioq.nb_packets == 0)
2342             SDL_CondSignal(is->continue_read_thread);
2343
2344         /* read next packet */
2345         if ((packet_queue_get(&is->audioq, pkt, 1, &is->audio_pkt_temp_serial)) < 0)
2346             return -1;
2347
2348         if (pkt->data == flush_pkt.data) {
2349             avcodec_flush_buffers(dec);
2350             is->audio_buf_frames_pending = 0;
2351             is->audio_frame_next_pts = AV_NOPTS_VALUE;
2352             if ((is->ic->iformat->flags & (AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK)) && !is->ic->iformat->read_seek)
2353                 is->audio_frame_next_pts = is->audio_st->start_time;
2354         }
2355
2356         *pkt_temp = *pkt;
2357     }
2358 }
2359
2360 /* prepare a new audio buffer */
2361 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
2362 {
2363     VideoState *is = opaque;
2364     int audio_size, len1;
2365     int bytes_per_sec;
2366     int frame_size = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, 1, is->audio_tgt.fmt, 1);
2367
2368     audio_callback_time = av_gettime();
2369
2370     while (len > 0) {
2371         if (is->audio_buf_index >= is->audio_buf_size) {
2372            audio_size = audio_decode_frame(is);
2373            if (audio_size < 0) {
2374                 /* if error, just output silence */
2375                is->audio_buf      = is->silence_buf;
2376                is->audio_buf_size = sizeof(is->silence_buf) / frame_size * frame_size;
2377            } else {
2378                if (is->show_mode != SHOW_MODE_VIDEO)
2379                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2380                is->audio_buf_size = audio_size;
2381            }
2382            is->audio_buf_index = 0;
2383         }
2384         len1 = is->audio_buf_size - is->audio_buf_index;
2385         if (len1 > len)
2386             len1 = len;
2387         memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2388         len -= len1;
2389         stream += len1;
2390         is->audio_buf_index += len1;
2391     }
2392     bytes_per_sec = is->audio_tgt.freq * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2393     is->audio_write_buf_size = is->audio_buf_size - is->audio_buf_index;
2394     /* Let's assume the audio driver that is used by SDL has two periods. */
2395     if (!isnan(is->audio_clock)) {
2396         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);
2397         sync_clock_to_slave(&is->extclk, &is->audclk);
2398     }
2399 }
2400
2401 static int audio_open(void *opaque, int64_t wanted_channel_layout, int wanted_nb_channels, int wanted_sample_rate, struct AudioParams *audio_hw_params)
2402 {
2403     SDL_AudioSpec wanted_spec, spec;
2404     const char *env;
2405     const int next_nb_channels[] = {0, 0, 1, 6, 2, 6, 4, 6};
2406
2407     env = SDL_getenv("SDL_AUDIO_CHANNELS");
2408     if (env) {
2409         wanted_nb_channels = atoi(env);
2410         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2411     }
2412     if (!wanted_channel_layout || wanted_nb_channels != av_get_channel_layout_nb_channels(wanted_channel_layout)) {
2413         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2414         wanted_channel_layout &= ~AV_CH_LAYOUT_STEREO_DOWNMIX;
2415     }
2416     wanted_spec.channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
2417     wanted_spec.freq = wanted_sample_rate;
2418     if (wanted_spec.freq <= 0 || wanted_spec.channels <= 0) {
2419         av_log(NULL, AV_LOG_ERROR, "Invalid sample rate or channel count!\n");
2420         return -1;
2421     }
2422     wanted_spec.format = AUDIO_S16SYS;
2423     wanted_spec.silence = 0;
2424     wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
2425     wanted_spec.callback = sdl_audio_callback;
2426     wanted_spec.userdata = opaque;
2427     while (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
2428         av_log(NULL, AV_LOG_WARNING, "SDL_OpenAudio (%d channels): %s\n", wanted_spec.channels, SDL_GetError());
2429         wanted_spec.channels = next_nb_channels[FFMIN(7, wanted_spec.channels)];
2430         if (!wanted_spec.channels) {
2431             av_log(NULL, AV_LOG_ERROR,
2432                    "No more channel combinations to try, audio open failed\n");
2433             return -1;
2434         }
2435         wanted_channel_layout = av_get_default_channel_layout(wanted_spec.channels);
2436     }
2437     if (spec.format != AUDIO_S16SYS) {
2438         av_log(NULL, AV_LOG_ERROR,
2439                "SDL advised audio format %d is not supported!\n", spec.format);
2440         return -1;
2441     }
2442     if (spec.channels != wanted_spec.channels) {
2443         wanted_channel_layout = av_get_default_channel_layout(spec.channels);
2444         if (!wanted_channel_layout) {
2445             av_log(NULL, AV_LOG_ERROR,
2446                    "SDL advised channel count %d is not supported!\n", spec.channels);
2447             return -1;
2448         }
2449     }
2450
2451     audio_hw_params->fmt = AV_SAMPLE_FMT_S16;
2452     audio_hw_params->freq = spec.freq;
2453     audio_hw_params->channel_layout = wanted_channel_layout;
2454     audio_hw_params->channels =  spec.channels;
2455     return spec.size;
2456 }
2457
2458 /* open a given stream. Return 0 if OK */
2459 static int stream_component_open(VideoState *is, int stream_index)
2460 {
2461     AVFormatContext *ic = is->ic;
2462     AVCodecContext *avctx;
2463     AVCodec *codec;
2464     const char *forced_codec_name = NULL;
2465     AVDictionary *opts;
2466     AVDictionaryEntry *t = NULL;
2467     int sample_rate, nb_channels;
2468     int64_t channel_layout;
2469     int ret;
2470
2471     if (stream_index < 0 || stream_index >= ic->nb_streams)
2472         return -1;
2473     avctx = ic->streams[stream_index]->codec;
2474
2475     codec = avcodec_find_decoder(avctx->codec_id);
2476
2477     switch(avctx->codec_type){
2478         case AVMEDIA_TYPE_AUDIO   : is->last_audio_stream    = stream_index; forced_codec_name =    audio_codec_name; break;
2479         case AVMEDIA_TYPE_SUBTITLE: is->last_subtitle_stream = stream_index; forced_codec_name = subtitle_codec_name; break;
2480         case AVMEDIA_TYPE_VIDEO   : is->last_video_stream    = stream_index; forced_codec_name =    video_codec_name; break;
2481     }
2482     if (forced_codec_name)
2483         codec = avcodec_find_decoder_by_name(forced_codec_name);
2484     if (!codec) {
2485         if (forced_codec_name) av_log(NULL, AV_LOG_WARNING,
2486                                       "No codec could be found with name '%s'\n", forced_codec_name);
2487         else                   av_log(NULL, AV_LOG_WARNING,
2488                                       "No codec could be found with id %d\n", avctx->codec_id);
2489         return -1;
2490     }
2491
2492     avctx->codec_id = codec->id;
2493     avctx->workaround_bugs   = workaround_bugs;
2494     avctx->lowres            = lowres;
2495     if(avctx->lowres > codec->max_lowres){
2496         av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
2497                 codec->max_lowres);
2498         avctx->lowres= codec->max_lowres;
2499     }
2500     avctx->error_concealment = error_concealment;
2501
2502     if(avctx->lowres) avctx->flags |= CODEC_FLAG_EMU_EDGE;
2503     if (fast)   avctx->flags2 |= CODEC_FLAG2_FAST;
2504     if(codec->capabilities & CODEC_CAP_DR1)
2505         avctx->flags |= CODEC_FLAG_EMU_EDGE;
2506
2507     opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], codec);
2508     if (!av_dict_get(opts, "threads", NULL, 0))
2509         av_dict_set(&opts, "threads", "auto", 0);
2510     if (avctx->lowres)
2511         av_dict_set(&opts, "lowres", av_asprintf("%d", avctx->lowres), AV_DICT_DONT_STRDUP_VAL);
2512     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
2513         av_dict_set(&opts, "refcounted_frames", "1", 0);
2514     if (avcodec_open2(avctx, codec, &opts) < 0)
2515         return -1;
2516     if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2517         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2518         return AVERROR_OPTION_NOT_FOUND;
2519     }
2520
2521     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
2522     switch (avctx->codec_type) {
2523     case AVMEDIA_TYPE_AUDIO:
2524 #if CONFIG_AVFILTER
2525         {
2526             AVFilterLink *link;
2527
2528             is->audio_filter_src.freq           = avctx->sample_rate;
2529             is->audio_filter_src.channels       = avctx->channels;
2530             is->audio_filter_src.channel_layout = get_valid_channel_layout(avctx->channel_layout, avctx->channels);
2531             is->audio_filter_src.fmt            = avctx->sample_fmt;
2532             if ((ret = configure_audio_filters(is, afilters, 0)) < 0)
2533                 return ret;
2534             link = is->out_audio_filter->inputs[0];
2535             sample_rate    = link->sample_rate;
2536             nb_channels    = link->channels;
2537             channel_layout = link->channel_layout;
2538         }
2539 #else
2540         sample_rate    = avctx->sample_rate;
2541         nb_channels    = avctx->channels;
2542         channel_layout = avctx->channel_layout;
2543 #endif
2544
2545         /* prepare audio output */
2546         if ((ret = audio_open(is, channel_layout, nb_channels, sample_rate, &is->audio_tgt)) < 0)
2547             return ret;
2548         is->audio_hw_buf_size = ret;
2549         is->audio_src = is->audio_tgt;
2550         is->audio_buf_size  = 0;
2551         is->audio_buf_index = 0;
2552
2553         /* init averaging filter */
2554         is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2555         is->audio_diff_avg_count = 0;
2556         /* since we do not have a precise anough audio fifo fullness,
2557            we correct audio sync only if larger than this threshold */
2558         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);
2559
2560         memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
2561         memset(&is->audio_pkt_temp, 0, sizeof(is->audio_pkt_temp));
2562         is->audio_pkt_temp.stream_index = -1;
2563
2564         is->audio_stream = stream_index;
2565         is->audio_st = ic->streams[stream_index];
2566
2567         packet_queue_start(&is->audioq);
2568         SDL_PauseAudio(0);
2569         break;
2570     case AVMEDIA_TYPE_VIDEO:
2571         is->video_stream = stream_index;
2572         is->video_st = ic->streams[stream_index];
2573
2574         packet_queue_start(&is->videoq);
2575         is->video_tid = SDL_CreateThread(video_thread, is);
2576         is->queue_attachments_req = 1;
2577         break;
2578     case AVMEDIA_TYPE_SUBTITLE:
2579         is->subtitle_stream = stream_index;
2580         is->subtitle_st = ic->streams[stream_index];
2581         packet_queue_start(&is->subtitleq);
2582
2583         is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
2584         break;
2585     default:
2586         break;
2587     }
2588     return 0;
2589 }
2590
2591 static void stream_component_close(VideoState *is, int stream_index)
2592 {
2593     AVFormatContext *ic = is->ic;
2594     AVCodecContext *avctx;
2595
2596     if (stream_index < 0 || stream_index >= ic->nb_streams)
2597         return;
2598     avctx = ic->streams[stream_index]->codec;
2599
2600     switch (avctx->codec_type) {
2601     case AVMEDIA_TYPE_AUDIO:
2602         packet_queue_abort(&is->audioq);
2603
2604         SDL_CloseAudio();
2605
2606         packet_queue_flush(&is->audioq);
2607         av_free_packet(&is->audio_pkt);
2608         swr_free(&is->swr_ctx);
2609         av_freep(&is->audio_buf1);
2610         is->audio_buf1_size = 0;
2611         is->audio_buf = NULL;
2612         av_frame_free(&is->frame);
2613
2614         if (is->rdft) {
2615             av_rdft_end(is->rdft);
2616             av_freep(&is->rdft_data);
2617             is->rdft = NULL;
2618             is->rdft_bits = 0;
2619         }
2620 #if CONFIG_AVFILTER
2621         avfilter_graph_free(&is->agraph);
2622 #endif
2623         break;
2624     case AVMEDIA_TYPE_VIDEO:
2625         packet_queue_abort(&is->videoq);
2626
2627         /* note: we also signal this mutex to make sure we deblock the
2628            video thread in all cases */
2629         SDL_LockMutex(is->pictq_mutex);
2630         SDL_CondSignal(is->pictq_cond);
2631         SDL_UnlockMutex(is->pictq_mutex);
2632
2633         SDL_WaitThread(is->video_tid, NULL);
2634
2635         packet_queue_flush(&is->videoq);
2636         break;
2637     case AVMEDIA_TYPE_SUBTITLE:
2638         packet_queue_abort(&is->subtitleq);
2639
2640         /* note: we also signal this mutex to make sure we deblock the
2641            video thread in all cases */
2642         SDL_LockMutex(is->subpq_mutex);
2643         SDL_CondSignal(is->subpq_cond);
2644         SDL_UnlockMutex(is->subpq_mutex);
2645
2646         SDL_WaitThread(is->subtitle_tid, NULL);
2647
2648         packet_queue_flush(&is->subtitleq);
2649         break;
2650     default:
2651         break;
2652     }
2653
2654     ic->streams[stream_index]->discard = AVDISCARD_ALL;
2655     avcodec_close(avctx);
2656     switch (avctx->codec_type) {
2657     case AVMEDIA_TYPE_AUDIO:
2658         is->audio_st = NULL;
2659         is->audio_stream = -1;
2660         break;
2661     case AVMEDIA_TYPE_VIDEO:
2662         is->video_st = NULL;
2663         is->video_stream = -1;
2664         break;
2665     case AVMEDIA_TYPE_SUBTITLE:
2666         is->subtitle_st = NULL;
2667         is->subtitle_stream = -1;
2668         break;
2669     default:
2670         break;
2671     }
2672 }
2673
2674 static int decode_interrupt_cb(void *ctx)
2675 {
2676     VideoState *is = ctx;
2677     return is->abort_request;
2678 }
2679
2680 static int is_realtime(AVFormatContext *s)
2681 {
2682     if(   !strcmp(s->iformat->name, "rtp")
2683        || !strcmp(s->iformat->name, "rtsp")
2684        || !strcmp(s->iformat->name, "sdp")
2685     )
2686         return 1;
2687
2688     if(s->pb && (   !strncmp(s->filename, "rtp:", 4)
2689                  || !strncmp(s->filename, "udp:", 4)
2690                 )
2691     )
2692         return 1;
2693     return 0;
2694 }
2695
2696 /* this thread gets the stream from the disk or the network */
2697 static int read_thread(void *arg)
2698 {
2699     VideoState *is = arg;
2700     AVFormatContext *ic = NULL;
2701     int err, i, ret;
2702     int st_index[AVMEDIA_TYPE_NB];
2703     AVPacket pkt1, *pkt = &pkt1;
2704     int eof = 0;
2705     int64_t stream_start_time;
2706     int pkt_in_play_range = 0;
2707     AVDictionaryEntry *t;
2708     AVDictionary **opts;
2709     int orig_nb_streams;
2710     SDL_mutex *wait_mutex = SDL_CreateMutex();
2711
2712     memset(st_index, -1, sizeof(st_index));
2713     is->last_video_stream = is->video_stream = -1;
2714     is->last_audio_stream = is->audio_stream = -1;
2715     is->last_subtitle_stream = is->subtitle_stream = -1;
2716
2717     ic = avformat_alloc_context();
2718     ic->interrupt_callback.callback = decode_interrupt_cb;
2719     ic->interrupt_callback.opaque = is;
2720     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2721     if (err < 0) {
2722         print_error(is->filename, err);
2723         ret = -1;
2724         goto fail;
2725     }
2726     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2727         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2728         ret = AVERROR_OPTION_NOT_FOUND;
2729         goto fail;
2730     }
2731     is->ic = ic;
2732
2733     if (genpts)
2734         ic->flags |= AVFMT_FLAG_GENPTS;
2735
2736     opts = setup_find_stream_info_opts(ic, codec_opts);
2737     orig_nb_streams = ic->nb_streams;
2738
2739     err = avformat_find_stream_info(ic, opts);
2740     if (err < 0) {
2741         av_log(NULL, AV_LOG_WARNING,
2742                "%s: could not find codec parameters\n", is->filename);
2743         ret = -1;
2744         goto fail;
2745     }
2746     for (i = 0; i < orig_nb_streams; i++)
2747         av_dict_free(&opts[i]);
2748     av_freep(&opts);
2749
2750     if (ic->pb)
2751         ic->pb->eof_reached = 0; // FIXME hack, ffplay maybe should not use url_feof() to test for the end
2752
2753     if (seek_by_bytes < 0)
2754         seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT) && strcmp("ogg", ic->iformat->name);
2755
2756     is->max_frame_duration = (ic->iformat->flags & AVFMT_TS_DISCONT) ? 10.0 : 3600.0;
2757
2758     if (!window_title && (t = av_dict_get(ic->metadata, "title", NULL, 0)))
2759         window_title = av_asprintf("%s - %s", t->value, input_filename);
2760
2761     /* if seeking requested, we execute it */
2762     if (start_time != AV_NOPTS_VALUE) {
2763         int64_t timestamp;
2764
2765         timestamp = start_time;
2766         /* add the stream start time */
2767         if (ic->start_time != AV_NOPTS_VALUE)
2768             timestamp += ic->start_time;
2769         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
2770         if (ret < 0) {
2771             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
2772                     is->filename, (double)timestamp / AV_TIME_BASE);
2773         }
2774     }
2775
2776     is->realtime = is_realtime(ic);
2777
2778     for (i = 0; i < ic->nb_streams; i++)
2779         ic->streams[i]->discard = AVDISCARD_ALL;
2780     if (!video_disable)
2781         st_index[AVMEDIA_TYPE_VIDEO] =
2782             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
2783                                 wanted_stream[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
2784     if (!audio_disable)
2785         st_index[AVMEDIA_TYPE_AUDIO] =
2786             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
2787                                 wanted_stream[AVMEDIA_TYPE_AUDIO],
2788                                 st_index[AVMEDIA_TYPE_VIDEO],
2789                                 NULL, 0);
2790     if (!video_disable && !subtitle_disable)
2791         st_index[AVMEDIA_TYPE_SUBTITLE] =
2792             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
2793                                 wanted_stream[AVMEDIA_TYPE_SUBTITLE],
2794                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
2795                                  st_index[AVMEDIA_TYPE_AUDIO] :
2796                                  st_index[AVMEDIA_TYPE_VIDEO]),
2797                                 NULL, 0);
2798     if (show_status) {
2799         av_dump_format(ic, 0, is->filename, 0);
2800     }
2801
2802     is->show_mode = show_mode;
2803
2804     /* open the streams */
2805     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
2806         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2807     }
2808
2809     ret = -1;
2810     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2811         ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2812     }
2813     if (is->show_mode == SHOW_MODE_NONE)
2814         is->show_mode = ret >= 0 ? SHOW_MODE_VIDEO : SHOW_MODE_RDFT;
2815
2816     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
2817         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2818     }
2819
2820     if (is->video_stream < 0 && is->audio_stream < 0) {
2821         av_log(NULL, AV_LOG_FATAL, "Failed to open file '%s' or configure filtergraph\n",
2822                is->filename);
2823         ret = -1;
2824         goto fail;
2825     }
2826
2827     if (infinite_buffer < 0 && is->realtime)
2828         infinite_buffer = 1;
2829
2830     for (;;) {
2831         if (is->abort_request)
2832             break;
2833         if (is->paused != is->last_paused) {
2834             is->last_paused = is->paused;
2835             if (is->paused)
2836                 is->read_pause_return = av_read_pause(ic);
2837             else
2838                 av_read_play(ic);
2839         }
2840 #if CONFIG_RTSP_DEMUXER || CONFIG_MMSH_PROTOCOL
2841         if (is->paused &&
2842                 (!strcmp(ic->iformat->name, "rtsp") ||
2843                  (ic->pb && !strncmp(input_filename, "mmsh:", 5)))) {
2844             /* wait 10 ms to avoid trying to get another packet */
2845             /* XXX: horrible */
2846             SDL_Delay(10);
2847             continue;
2848         }
2849 #endif
2850         if (is->seek_req) {
2851             int64_t seek_target = is->seek_pos;
2852             int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2853             int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2854 // FIXME the +-2 is due to rounding being not done in the correct direction in generation
2855 //      of the seek_pos/seek_rel variables
2856
2857             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2858             if (ret < 0) {
2859                 av_log(NULL, AV_LOG_ERROR,
2860                        "%s: error while seeking\n", is->ic->filename);
2861             } else {
2862                 if (is->audio_stream >= 0) {
2863                     packet_queue_flush(&is->audioq);
2864                     packet_queue_put(&is->audioq, &flush_pkt);
2865                 }
2866                 if (is->subtitle_stream >= 0) {
2867                     packet_queue_flush(&is->subtitleq);
2868                     packet_queue_put(&is->subtitleq, &flush_pkt);
2869                 }
2870                 if (is->video_stream >= 0) {
2871                     packet_queue_flush(&is->videoq);
2872                     packet_queue_put(&is->videoq, &flush_pkt);
2873                 }
2874                 if (is->seek_flags & AVSEEK_FLAG_BYTE) {
2875                    set_clock(&is->extclk, NAN, 0);
2876                 } else {
2877                    set_clock(&is->extclk, seek_target / (double)AV_TIME_BASE, 0);
2878                 }
2879             }
2880             is->seek_req = 0;
2881             is->queue_attachments_req = 1;
2882             eof = 0;
2883             if (is->paused)
2884                 step_to_next_frame(is);
2885         }
2886         if (is->queue_attachments_req) {
2887             if (is->video_st && is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC) {
2888                 AVPacket copy;
2889                 if ((ret = av_copy_packet(&copy, &is->video_st->attached_pic)) < 0)
2890                     goto fail;
2891                 packet_queue_put(&is->videoq, &copy);
2892             }
2893             is->queue_attachments_req = 0;
2894         }
2895
2896         /* if the queue are full, no need to read more */
2897         if (infinite_buffer<1 &&
2898               (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2899             || (   (is->audioq   .nb_packets > MIN_FRAMES || is->audio_stream < 0 || is->audioq.abort_request)
2900                 && (is->videoq   .nb_packets > MIN_FRAMES || is->video_stream < 0 || is->videoq.abort_request
2901                     || (is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC))
2902                 && (is->subtitleq.nb_packets > MIN_FRAMES || is->subtitle_stream < 0 || is->subtitleq.abort_request)))) {
2903             /* wait 10 ms */
2904             SDL_LockMutex(wait_mutex);
2905             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2906             SDL_UnlockMutex(wait_mutex);
2907             continue;
2908         }
2909         if (!is->paused &&
2910             (!is->audio_st || is->audio_finished == is->audioq.serial) &&
2911             (!is->video_st || (is->video_finished == is->videoq.serial && is->pictq_size == 0))) {
2912             if (loop != 1 && (!loop || --loop)) {
2913                 stream_seek(is, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
2914             } else if (autoexit) {
2915                 ret = AVERROR_EOF;
2916                 goto fail;
2917             }
2918         }
2919         if (eof) {
2920             if (is->video_stream >= 0) {
2921                 av_init_packet(pkt);
2922                 pkt->data = NULL;
2923                 pkt->size = 0;
2924                 pkt->stream_index = is->video_stream;
2925                 packet_queue_put(&is->videoq, pkt);
2926             }
2927             if (is->audio_stream >= 0) {
2928                 av_init_packet(pkt);
2929                 pkt->data = NULL;
2930                 pkt->size = 0;
2931                 pkt->stream_index = is->audio_stream;
2932                 packet_queue_put(&is->audioq, pkt);
2933             }
2934             SDL_Delay(10);
2935             eof=0;
2936             continue;
2937         }
2938         ret = av_read_frame(ic, pkt);
2939         if (ret < 0) {
2940             if (ret == AVERROR_EOF || url_feof(ic->pb))
2941                 eof = 1;
2942             if (ic->pb && ic->pb->error)
2943                 break;
2944             SDL_LockMutex(wait_mutex);
2945             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2946             SDL_UnlockMutex(wait_mutex);
2947             continue;
2948         }
2949         /* check if packet is in play range specified by user, then queue, otherwise discard */
2950         stream_start_time = ic->streams[pkt->stream_index]->start_time;
2951         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
2952                 (pkt->pts - (stream_start_time != AV_NOPTS_VALUE ? stream_start_time : 0)) *
2953                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
2954                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
2955                 <= ((double)duration / 1000000);
2956         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
2957             packet_queue_put(&is->audioq, pkt);
2958         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range
2959                    && !(is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
2960             packet_queue_put(&is->videoq, pkt);
2961         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
2962             packet_queue_put(&is->subtitleq, pkt);
2963         } else {
2964             av_free_packet(pkt);
2965         }
2966     }
2967     /* wait until the end */
2968     while (!is->abort_request) {
2969         SDL_Delay(100);
2970     }
2971
2972     ret = 0;
2973  fail:
2974     /* close each stream */
2975     if (is->audio_stream >= 0)
2976         stream_component_close(is, is->audio_stream);
2977     if (is->video_stream >= 0)
2978         stream_component_close(is, is->video_stream);
2979     if (is->subtitle_stream >= 0)
2980         stream_component_close(is, is->subtitle_stream);
2981     if (is->ic) {
2982         avformat_close_input(&is->ic);
2983     }
2984
2985     if (ret != 0) {
2986         SDL_Event event;
2987
2988         event.type = FF_QUIT_EVENT;
2989         event.user.data1 = is;
2990         SDL_PushEvent(&event);
2991     }
2992     SDL_DestroyMutex(wait_mutex);
2993     return 0;
2994 }
2995
2996 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
2997 {
2998     VideoState *is;
2999
3000     is = av_mallocz(sizeof(VideoState));
3001     if (!is)
3002         return NULL;
3003     av_strlcpy(is->filename, filename, sizeof(is->filename));
3004     is->iformat = iformat;
3005     is->ytop    = 0;
3006     is->xleft   = 0;
3007
3008     /* start video display */
3009     is->pictq_mutex = SDL_CreateMutex();
3010     is->pictq_cond  = SDL_CreateCond();
3011
3012     is->subpq_mutex = SDL_CreateMutex();
3013     is->subpq_cond  = SDL_CreateCond();
3014
3015     packet_queue_init(&is->videoq);
3016     packet_queue_init(&is->audioq);
3017     packet_queue_init(&is->subtitleq);
3018
3019     is->continue_read_thread = SDL_CreateCond();
3020
3021     init_clock(&is->vidclk, &is->videoq.serial);
3022     init_clock(&is->audclk, &is->audioq.serial);
3023     init_clock(&is->extclk, &is->extclk.serial);
3024     is->audio_clock_serial = -1;
3025     is->audio_last_serial = -1;
3026     is->av_sync_type = av_sync_type;
3027     is->read_tid     = SDL_CreateThread(read_thread, is);
3028     if (!is->read_tid) {
3029         av_free(is);
3030         return NULL;
3031     }
3032     return is;
3033 }
3034
3035 static void stream_cycle_channel(VideoState *is, int codec_type)
3036 {
3037     AVFormatContext *ic = is->ic;
3038     int start_index, stream_index;
3039     int old_index;
3040     AVStream *st;
3041
3042     if (codec_type == AVMEDIA_TYPE_VIDEO) {
3043         start_index = is->last_video_stream;
3044         old_index = is->video_stream;
3045     } else if (codec_type == AVMEDIA_TYPE_AUDIO) {
3046         start_index = is->last_audio_stream;
3047         old_index = is->audio_stream;
3048     } else {
3049         start_index = is->last_subtitle_stream;
3050         old_index = is->subtitle_stream;
3051     }
3052     stream_index = start_index;
3053     for (;;) {
3054         if (++stream_index >= is->ic->nb_streams)
3055         {
3056             if (codec_type == AVMEDIA_TYPE_SUBTITLE)
3057             {
3058                 stream_index = -1;
3059                 is->last_subtitle_stream = -1;
3060                 goto the_end;
3061             }
3062             if (start_index == -1)
3063                 return;
3064             stream_index = 0;
3065         }
3066         if (stream_index == start_index)
3067             return;
3068         st = ic->streams[stream_index];
3069         if (st->codec->codec_type == codec_type) {
3070             /* check that parameters are OK */
3071             switch (codec_type) {
3072             case AVMEDIA_TYPE_AUDIO:
3073                 if (st->codec->sample_rate != 0 &&
3074                     st->codec->channels != 0)
3075                     goto the_end;
3076                 break;
3077             case AVMEDIA_TYPE_VIDEO:
3078             case AVMEDIA_TYPE_SUBTITLE:
3079                 goto the_end;
3080             default:
3081                 break;
3082             }
3083         }
3084     }
3085  the_end:
3086     stream_component_close(is, old_index);
3087     stream_component_open(is, stream_index);
3088 }
3089
3090
3091 static void toggle_full_screen(VideoState *is)
3092 {
3093 #if defined(__APPLE__) && SDL_VERSION_ATLEAST(1, 2, 14)
3094     /* OS X needs to reallocate the SDL overlays */
3095     int i;
3096     for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++)
3097         is->pictq[i].reallocate = 1;
3098 #endif
3099     is_full_screen = !is_full_screen;
3100     video_open(is, 1, NULL);
3101 }
3102
3103 static void toggle_audio_display(VideoState *is)
3104 {
3105     int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
3106     int next = is->show_mode;
3107     do {
3108         next = (next + 1) % SHOW_MODE_NB;
3109     } while (next != is->show_mode && (next == SHOW_MODE_VIDEO && !is->video_st || next != SHOW_MODE_VIDEO && !is->audio_st));
3110     if (is->show_mode != next) {
3111         fill_rectangle(screen,
3112                     is->xleft, is->ytop, is->width, is->height,
3113                     bgcolor, 1);
3114         is->force_refresh = 1;
3115         is->show_mode = next;
3116     }
3117 }
3118
3119 static void refresh_loop_wait_event(VideoState *is, SDL_Event *event) {
3120     double remaining_time = 0.0;
3121     SDL_PumpEvents();
3122     while (!SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS)) {
3123         if (!cursor_hidden && av_gettime() - cursor_last_shown > CURSOR_HIDE_DELAY) {
3124             SDL_ShowCursor(0);
3125             cursor_hidden = 1;
3126         }
3127         if (remaining_time > 0.0)
3128             av_usleep((int64_t)(remaining_time * 1000000.0));
3129         remaining_time = REFRESH_RATE;
3130         if (is->show_mode != SHOW_MODE_NONE && (!is->paused || is->force_refresh))
3131             video_refresh(is, &remaining_time);
3132         SDL_PumpEvents();
3133     }
3134 }
3135
3136 /* handle an event sent by the GUI */
3137 static void event_loop(VideoState *cur_stream)
3138 {
3139     SDL_Event event;
3140     double incr, pos, frac;
3141
3142     for (;;) {
3143         double x;
3144         refresh_loop_wait_event(cur_stream, &event);
3145         switch (event.type) {
3146         case SDL_KEYDOWN:
3147             if (exit_on_keydown) {
3148                 do_exit(cur_stream);
3149                 break;
3150             }
3151             switch (event.key.keysym.sym) {
3152             case SDLK_ESCAPE:
3153             case SDLK_q:
3154                 do_exit(cur_stream);
3155                 break;
3156             case SDLK_f:
3157                 toggle_full_screen(cur_stream);
3158                 cur_stream->force_refresh = 1;
3159                 break;
3160             case SDLK_p:
3161             case SDLK_SPACE:
3162                 toggle_pause(cur_stream);
3163                 break;
3164             case SDLK_s: // S: Step to next frame
3165                 step_to_next_frame(cur_stream);
3166                 break;
3167             case SDLK_a:
3168                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3169                 break;
3170             case SDLK_v:
3171                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3172                 break;
3173             case SDLK_t:
3174                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3175                 break;
3176             case SDLK_w:
3177                 toggle_audio_display(cur_stream);
3178                 break;
3179             case SDLK_PAGEUP:
3180                 incr = 600.0;
3181                 goto do_seek;
3182             case SDLK_PAGEDOWN:
3183                 incr = -600.0;
3184                 goto do_seek;
3185             case SDLK_LEFT:
3186                 incr = -10.0;
3187                 goto do_seek;
3188             case SDLK_RIGHT:
3189                 incr = 10.0;
3190                 goto do_seek;
3191             case SDLK_UP:
3192                 incr = 60.0;
3193                 goto do_seek;
3194             case SDLK_DOWN:
3195                 incr = -60.0;
3196             do_seek:
3197                     if (seek_by_bytes) {
3198                         if (cur_stream->video_stream >= 0 && cur_stream->video_current_pos >= 0) {
3199                             pos = cur_stream->video_current_pos;
3200                         } else if (cur_stream->audio_stream >= 0 && cur_stream->audio_pkt.pos >= 0) {
3201                             pos = cur_stream->audio_pkt.pos;
3202                         } else
3203                             pos = avio_tell(cur_stream->ic->pb);
3204                         if (cur_stream->ic->bit_rate)
3205                             incr *= cur_stream->ic->bit_rate / 8.0;
3206                         else
3207                             incr *= 180000.0;
3208                         pos += incr;
3209                         stream_seek(cur_stream, pos, incr, 1);
3210                     } else {
3211                         pos = get_master_clock(cur_stream);
3212                         if (isnan(pos))
3213                             pos = (double)cur_stream->seek_pos / AV_TIME_BASE;
3214                         pos += incr;
3215                         if (cur_stream->ic->start_time != AV_NOPTS_VALUE && pos < cur_stream->ic->start_time / (double)AV_TIME_BASE)
3216                             pos = cur_stream->ic->start_time / (double)AV_TIME_BASE;
3217                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
3218                     }
3219                 break;
3220             default:
3221                 break;
3222             }
3223             break;
3224         case SDL_VIDEOEXPOSE:
3225             cur_stream->force_refresh = 1;
3226             break;
3227         case SDL_MOUSEBUTTONDOWN:
3228             if (exit_on_mousedown) {
3229                 do_exit(cur_stream);
3230                 break;
3231             }
3232         case SDL_MOUSEMOTION:
3233             if (cursor_hidden) {
3234                 SDL_ShowCursor(1);
3235                 cursor_hidden = 0;
3236             }
3237             cursor_last_shown = av_gettime();
3238             if (event.type == SDL_MOUSEBUTTONDOWN) {
3239                 x = event.button.x;
3240             } else {
3241                 if (event.motion.state != SDL_PRESSED)
3242                     break;
3243                 x = event.motion.x;
3244             }
3245                 if (seek_by_bytes || cur_stream->ic->duration <= 0) {
3246                     uint64_t size =  avio_size(cur_stream->ic->pb);
3247                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
3248                 } else {
3249                     int64_t ts;
3250                     int ns, hh, mm, ss;
3251                     int tns, thh, tmm, tss;
3252                     tns  = cur_stream->ic->duration / 1000000LL;
3253                     thh  = tns / 3600;
3254                     tmm  = (tns % 3600) / 60;
3255                     tss  = (tns % 60);
3256                     frac = x / cur_stream->width;
3257                     ns   = frac * tns;
3258                     hh   = ns / 3600;
3259                     mm   = (ns % 3600) / 60;
3260                     ss   = (ns % 60);
3261                     av_log(NULL, AV_LOG_INFO,
3262                            "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
3263                             hh, mm, ss, thh, tmm, tss);
3264                     ts = frac * cur_stream->ic->duration;
3265                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
3266                         ts += cur_stream->ic->start_time;
3267                     stream_seek(cur_stream, ts, 0, 0);
3268                 }
3269             break;
3270         case SDL_VIDEORESIZE:
3271                 screen = SDL_SetVideoMode(FFMIN(16383, event.resize.w), event.resize.h, 0,
3272                                           SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
3273                 if (!screen) {
3274                     av_log(NULL, AV_LOG_FATAL, "Failed to set video mode\n");
3275                     do_exit(cur_stream);
3276                 }
3277                 screen_width  = cur_stream->width  = screen->w;
3278                 screen_height = cur_stream->height = screen->h;
3279                 cur_stream->force_refresh = 1;
3280             break;
3281         case SDL_QUIT:
3282         case FF_QUIT_EVENT:
3283             do_exit(cur_stream);
3284             break;
3285         case FF_ALLOC_EVENT:
3286             alloc_picture(event.user.data1);
3287             break;
3288         default:
3289             break;
3290         }
3291     }
3292 }
3293
3294 static int opt_frame_size(void *optctx, const char *opt, const char *arg)
3295 {
3296     av_log(NULL, AV_LOG_WARNING, "Option -s is deprecated, use -video_size.\n");
3297     return opt_default(NULL, "video_size", arg);
3298 }
3299
3300 static int opt_width(void *optctx, const char *opt, const char *arg)
3301 {
3302     screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3303     return 0;
3304 }
3305
3306 static int opt_height(void *optctx, const char *opt, const char *arg)
3307 {
3308     screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3309     return 0;
3310 }
3311
3312 static int opt_format(void *optctx, const char *opt, const char *arg)
3313 {
3314     file_iformat = av_find_input_format(arg);
3315     if (!file_iformat) {
3316         av_log(NULL, AV_LOG_FATAL, "Unknown input format: %s\n", arg);
3317         return AVERROR(EINVAL);
3318     }
3319     return 0;
3320 }
3321
3322 static int opt_frame_pix_fmt(void *optctx, const char *opt, const char *arg)
3323 {
3324     av_log(NULL, AV_LOG_WARNING, "Option -pix_fmt is deprecated, use -pixel_format.\n");
3325     return opt_default(NULL, "pixel_format", arg);
3326 }
3327
3328 static int opt_sync(void *optctx, const char *opt, const char *arg)
3329 {
3330     if (!strcmp(arg, "audio"))
3331         av_sync_type = AV_SYNC_AUDIO_MASTER;
3332     else if (!strcmp(arg, "video"))
3333         av_sync_type = AV_SYNC_VIDEO_MASTER;
3334     else if (!strcmp(arg, "ext"))
3335         av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
3336     else {
3337         av_log(NULL, AV_LOG_ERROR, "Unknown value for %s: %s\n", opt, arg);
3338         exit(1);
3339     }
3340     return 0;
3341 }
3342
3343 static int opt_seek(void *optctx, const char *opt, const char *arg)
3344 {
3345     start_time = parse_time_or_die(opt, arg, 1);
3346     return 0;
3347 }
3348
3349 static int opt_duration(void *optctx, const char *opt, const char *arg)
3350 {
3351     duration = parse_time_or_die(opt, arg, 1);
3352     return 0;
3353 }
3354
3355 static int opt_show_mode(void *optctx, const char *opt, const char *arg)
3356 {
3357     show_mode = !strcmp(arg, "video") ? SHOW_MODE_VIDEO :
3358                 !strcmp(arg, "waves") ? SHOW_MODE_WAVES :
3359                 !strcmp(arg, "rdft" ) ? SHOW_MODE_RDFT  :
3360                 parse_number_or_die(opt, arg, OPT_INT, 0, SHOW_MODE_NB-1);
3361     return 0;
3362 }
3363
3364 static void opt_input_file(void *optctx, const char *filename)
3365 {
3366     if (input_filename) {
3367         av_log(NULL, AV_LOG_FATAL,
3368                "Argument '%s' provided as input filename, but '%s' was already specified.\n",
3369                 filename, input_filename);
3370         exit(1);
3371     }
3372     if (!strcmp(filename, "-"))
3373         filename = "pipe:";
3374     input_filename = filename;
3375 }
3376
3377 static int opt_codec(void *optctx, const char *opt, const char *arg)
3378 {
3379    const char *spec = strchr(opt, ':');
3380    if (!spec) {
3381        av_log(NULL, AV_LOG_ERROR,
3382               "No media specifier was specified in '%s' in option '%s'\n",
3383                arg, opt);
3384        return AVERROR(EINVAL);
3385    }
3386    spec++;
3387    switch (spec[0]) {
3388    case 'a' :    audio_codec_name = arg; break;
3389    case 's' : subtitle_codec_name = arg; break;
3390    case 'v' :    video_codec_name = arg; break;
3391    default:
3392        av_log(NULL, AV_LOG_ERROR,
3393               "Invalid media specifier '%s' in option '%s'\n", spec, opt);
3394        return AVERROR(EINVAL);
3395    }
3396    return 0;
3397 }
3398
3399 static int dummy;
3400
3401 static const OptionDef options[] = {
3402 #include "cmdutils_common_opts.h"
3403     { "x", HAS_ARG, { .func_arg = opt_width }, "force displayed width", "width" },
3404     { "y", HAS_ARG, { .func_arg = opt_height }, "force displayed height", "height" },
3405     { "s", HAS_ARG | OPT_VIDEO, { .func_arg = opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
3406     { "fs", OPT_BOOL, { &is_full_screen }, "force full screen" },
3407     { "an", OPT_BOOL, { &audio_disable }, "disable audio" },
3408     { "vn", OPT_BOOL, { &video_disable }, "disable video" },
3409     { "sn", OPT_BOOL, { &subtitle_disable }, "disable subtitling" },
3410     { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_number" },
3411     { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_number" },
3412     { "sst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_number" },
3413     { "ss", HAS_ARG, { .func_arg = opt_seek }, "seek to a given position in seconds", "pos" },
3414     { "t", HAS_ARG, { .func_arg = opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
3415     { "bytes", OPT_INT | HAS_ARG, { &seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
3416     { "nodisp", OPT_BOOL, { &display_disable }, "disable graphical display" },
3417     { "f", HAS_ARG, { .func_arg = opt_format }, "force format", "fmt" },
3418     { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_frame_pix_fmt }, "set pixel format", "format" },
3419     { "stats", OPT_BOOL | OPT_EXPERT, { &show_status }, "show status", "" },
3420     { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, { &workaround_bugs }, "workaround bugs", "" },
3421     { "fast", OPT_BOOL | OPT_EXPERT, { &fast }, "non spec compliant optimizations", "" },
3422     { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
3423     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
3424     { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, { &lowres }, "", "" },
3425     { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, { &error_concealment }, "set error concealment options",  "bit_mask" },
3426     { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
3427     { "autoexit", OPT_BOOL | OPT_EXPERT, { &autoexit }, "exit at the end", "" },
3428     { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { &exit_on_keydown }, "exit on key down", "" },
3429     { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { &exit_on_mousedown }, "exit on mouse down", "" },
3430     { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { &loop }, "set number of times the playback shall be looped", "loop count" },
3431     { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
3432     { "infbuf", OPT_BOOL | OPT_EXPERT, { &infinite_buffer }, "don't limit the input buffer size (useful with realtime streams)", "" },
3433     { "window_title", OPT_STRING | HAS_ARG, { &window_title }, "set window title", "window title" },
3434 #if CONFIG_AVFILTER
3435     { "vf", OPT_STRING | HAS_ARG, { &vfilters }, "set video filters", "filter_graph" },
3436     { "af", OPT_STRING | HAS_ARG, { &afilters }, "set audio filters", "filter_graph" },
3437 #endif
3438     { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { &rdftspeed }, "rdft speed", "msecs" },
3439     { "showmode", HAS_ARG, { .func_arg = opt_show_mode}, "select show mode (0 = video, 1 = waves, 2 = RDFT)", "mode" },
3440     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { .func_arg = opt_default }, "generic catch all option", "" },
3441     { "i", OPT_BOOL, { &dummy}, "read specified file", "input_file"},
3442     { "codec", HAS_ARG, { .func_arg = opt_codec}, "force decoder", "decoder_name" },
3443     { "acodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &audio_codec_name }, "force audio decoder",    "decoder_name" },
3444     { "scodec", HAS_ARG | OPT_STRING | OPT_EXPERT, { &subtitle_codec_name }, "force subtitle decoder", "decoder_name" },
3445     { "vcodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &video_codec_name }, "force video decoder",    "decoder_name" },
3446     { NULL, },
3447 };
3448
3449 static void show_usage(void)
3450 {
3451     av_log(NULL, AV_LOG_INFO, "Simple media player\n");
3452     av_log(NULL, AV_LOG_INFO, "usage: %s [options] input_file\n", program_name);
3453     av_log(NULL, AV_LOG_INFO, "\n");
3454 }
3455
3456 void show_help_default(const char *opt, const char *arg)
3457 {
3458     av_log_set_callback(log_callback_help);
3459     show_usage();
3460     show_help_options(options, "Main options:", 0, OPT_EXPERT, 0);
3461     show_help_options(options, "Advanced options:", OPT_EXPERT, 0, 0);
3462     printf("\n");
3463     show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3464     show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3465 #if !CONFIG_AVFILTER
3466     show_help_children(sws_get_class(), AV_OPT_FLAG_ENCODING_PARAM);
3467 #else
3468     show_help_children(avfilter_get_class(), AV_OPT_FLAG_FILTERING_PARAM);
3469 #endif
3470     printf("\nWhile playing:\n"
3471            "q, ESC              quit\n"
3472            "f                   toggle full screen\n"
3473            "p, SPC              pause\n"
3474            "a                   cycle audio channel\n"
3475            "v                   cycle video channel\n"
3476            "t                   cycle subtitle channel\n"
3477            "w                   show audio waves\n"
3478            "s                   activate frame-step mode\n"
3479            "left/right          seek backward/forward 10 seconds\n"
3480            "down/up             seek backward/forward 1 minute\n"
3481            "page down/page up   seek backward/forward 10 minutes\n"
3482            "mouse click         seek to percentage in file corresponding to fraction of width\n"
3483            );
3484 }
3485
3486 static int lockmgr(void **mtx, enum AVLockOp op)
3487 {
3488    switch(op) {
3489       case AV_LOCK_CREATE:
3490           *mtx = SDL_CreateMutex();
3491           if(!*mtx)
3492               return 1;
3493           return 0;
3494       case AV_LOCK_OBTAIN:
3495           return !!SDL_LockMutex(*mtx);
3496       case AV_LOCK_RELEASE:
3497           return !!SDL_UnlockMutex(*mtx);
3498       case AV_LOCK_DESTROY:
3499           SDL_DestroyMutex(*mtx);
3500           return 0;
3501    }
3502    return 1;
3503 }
3504
3505 /* Called from the main */
3506 int main(int argc, char **argv)
3507 {
3508     int flags;
3509     VideoState *is;
3510     char dummy_videodriver[] = "SDL_VIDEODRIVER=dummy";
3511
3512     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3513     parse_loglevel(argc, argv, options);
3514
3515     /* register all codecs, demux and protocols */
3516     avcodec_register_all();
3517 #if CONFIG_AVDEVICE
3518     avdevice_register_all();
3519 #endif
3520 #if CONFIG_AVFILTER
3521     avfilter_register_all();
3522 #endif
3523     av_register_all();
3524     avformat_network_init();
3525
3526     init_opts();
3527
3528     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
3529     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
3530
3531     show_banner(argc, argv, options);
3532
3533     parse_options(NULL, argc, argv, options, opt_input_file);
3534
3535     if (!input_filename) {
3536         show_usage();
3537         av_log(NULL, AV_LOG_FATAL, "An input file must be specified\n");
3538         av_log(NULL, AV_LOG_FATAL,
3539                "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3540         exit(1);
3541     }
3542
3543     if (display_disable) {
3544         video_disable = 1;
3545     }
3546     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
3547     if (audio_disable)
3548         flags &= ~SDL_INIT_AUDIO;
3549     if (display_disable)
3550         SDL_putenv(dummy_videodriver); /* For the event queue, we always need a video driver. */
3551 #if !defined(__MINGW32__) && !defined(__APPLE__)
3552     flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */
3553 #endif
3554     if (SDL_Init (flags)) {
3555         av_log(NULL, AV_LOG_FATAL, "Could not initialize SDL - %s\n", SDL_GetError());
3556         av_log(NULL, AV_LOG_FATAL, "(Did you set the DISPLAY variable?)\n");
3557         exit(1);
3558     }
3559
3560     if (!display_disable) {
3561         const SDL_VideoInfo *vi = SDL_GetVideoInfo();
3562         fs_screen_width = vi->current_w;
3563         fs_screen_height = vi->current_h;
3564     }
3565
3566     SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
3567     SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
3568     SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
3569
3570     if (av_lockmgr_register(lockmgr)) {
3571         av_log(NULL, AV_LOG_FATAL, "Could not initialize lock manager!\n");
3572         do_exit(NULL);
3573     }
3574
3575     av_init_packet(&flush_pkt);
3576     flush_pkt.data = (uint8_t *)&flush_pkt;
3577
3578     is = stream_open(input_filename, file_iformat);
3579     if (!is) {
3580         av_log(NULL, AV_LOG_FATAL, "Failed to initialize VideoState!\n");
3581         do_exit(NULL);
3582     }
3583
3584     event_loop(is);
3585
3586     /* never returns */
3587
3588     return 0;
3589 }