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