avplay.c

   1 /*
   2  * avplay : Simple Media Player based on the Libav libraries
   3  * Copyright (c) 2003 Fabrice Bellard
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * Libav is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with Libav; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "config.h"
  23 #include <inttypes.h>
  24 #include <math.h>
  25 #include <limits.h>
  26 #include "libavutil/avstring.h"
  27 #include "libavutil/colorspace.h"
  28 #include "libavutil/mathematics.h"
  29 #include "libavutil/pixdesc.h"
  30 #include "libavutil/imgutils.h"
  31 #include "libavutil/dict.h"
  32 #include "libavutil/parseutils.h"
  33 #include "libavutil/samplefmt.h"
  34 #include "libavformat/avformat.h"
  35 #include "libavdevice/avdevice.h"
  36 #include "libswscale/swscale.h"
  37 #include "libavcodec/audioconvert.h"
  38 #include "libavutil/opt.h"
  39 #include "libavcodec/avfft.h"
  40
  41 #if CONFIG_AVFILTER
  42 # include "libavfilter/avfilter.h"
  43 # include "libavfilter/avfiltergraph.h"
  44 #endif
  45
  46 #include "cmdutils.h"
  47
  48 #include <SDL.h>
  49 #include <SDL_thread.h>
  50
  51 #ifdef __MINGW32__
  52 #undef main /* We don't want SDL to override our main() */
  53 #endif
  54
  55 #include <unistd.h>
  56 #include <assert.h>
  57
  58 const char program_name[] = "avplay";
  59 const int program_birth_year = 2003;
  60
  61 #define MAX_QUEUE_SIZE (15 * 1024 * 1024)
  62 #define MIN_AUDIOQ_SIZE (20 * 16 * 1024)
  63 #define MIN_FRAMES 5
  64
  65 /* SDL audio buffer size, in samples. Should be small to have precise
  66    A/V sync as SDL does not have hardware buffer fullness info. */
  67 #define SDL_AUDIO_BUFFER_SIZE 1024
  68
  69 /* no AV sync correction is done if below the AV sync threshold */
  70 #define AV_SYNC_THRESHOLD 0.01
  71 /* no AV correction is done if too big error */
  72 #define AV_NOSYNC_THRESHOLD 10.0
  73
  74 #define FRAME_SKIP_FACTOR 0.05
  75
  76 /* maximum audio speed change to get correct sync */
  77 #define SAMPLE_CORRECTION_PERCENT_MAX 10
  78
  79 /* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
  80 #define AUDIO_DIFF_AVG_NB   20
  81
  82 /* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
  83 #define SAMPLE_ARRAY_SIZE (2*65536)
  84
  85 static int sws_flags = SWS_BICUBIC;
  86
  87 typedef struct PacketQueue {
  88     AVPacketList *first_pkt, *last_pkt;
  89     int nb_packets;
  90     int size;
  91     int abort_request;
  92     SDL_mutex *mutex;
  93     SDL_cond *cond;
  94 } PacketQueue;
  95
  96 #define VIDEO_PICTURE_QUEUE_SIZE 2
  97 #define SUBPICTURE_QUEUE_SIZE 4
  98
  99 typedef struct VideoPicture {
 100     double pts;                                  ///<presentation time stamp for this picture
 101     double target_clock;                         ///<av_gettime() time at which this should be displayed ideally
 102     int64_t pos;                                 ///<byte position in file
 103     SDL_Overlay *bmp;
 104     int width, height; /* source height & width */
 105     int allocated;
 106     enum PixelFormat pix_fmt;
 107
 108 #if CONFIG_AVFILTER
 109     AVFilterBufferRef *picref;
 110 #endif
 111 } VideoPicture;
 112
 113 typedef struct SubPicture {
 114     double pts; /* presentation time stamp for this picture */
 115     AVSubtitle sub;
 116 } SubPicture;
 117
 118 enum {
 119     AV_SYNC_AUDIO_MASTER, /* default choice */
 120     AV_SYNC_VIDEO_MASTER,
 121     AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */
 122 };
 123
 124 typedef struct VideoState {
 125     SDL_Thread *parse_tid;
 126     SDL_Thread *video_tid;
 127     SDL_Thread *refresh_tid;
 128     AVInputFormat *iformat;
 129     int no_background;
 130     int abort_request;
 131     int paused;
 132     int last_paused;
 133     int seek_req;
 134     int seek_flags;
 135     int64_t seek_pos;
 136     int64_t seek_rel;
 137     int read_pause_return;
 138     AVFormatContext *ic;
 139     int dtg_active_format;
 140
 141     int audio_stream;
 142
 143     int av_sync_type;
 144     double external_clock; /* external clock base */
 145     int64_t external_clock_time;
 146
 147     double audio_clock;
 148     double audio_diff_cum; /* used for AV difference average computation */
 149     double audio_diff_avg_coef;
 150     double audio_diff_threshold;
 151     int audio_diff_avg_count;
 152     AVStream *audio_st;
 153     PacketQueue audioq;
 154     int audio_hw_buf_size;
 155     /* samples output by the codec. we reserve more space for avsync
 156        compensation */
 157     DECLARE_ALIGNED(16,uint8_t,audio_buf1)[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2];
 158     DECLARE_ALIGNED(16,uint8_t,audio_buf2)[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2];
 159     uint8_t *audio_buf;
 160     unsigned int audio_buf_size; /* in bytes */
 161     int audio_buf_index; /* in bytes */
 162     AVPacket audio_pkt_temp;
 163     AVPacket audio_pkt;
 164     enum AVSampleFormat audio_src_fmt;
 165     AVAudioConvert *reformat_ctx;
 166
 167     int show_audio; /* if true, display audio samples */
 168     int16_t sample_array[SAMPLE_ARRAY_SIZE];
 169     int sample_array_index;
 170     int last_i_start;
 171     RDFTContext *rdft;
 172     int rdft_bits;
 173     FFTSample *rdft_data;
 174     int xpos;
 175
 176     SDL_Thread *subtitle_tid;
 177     int subtitle_stream;
 178     int subtitle_stream_changed;
 179     AVStream *subtitle_st;
 180     PacketQueue subtitleq;
 181     SubPicture subpq[SUBPICTURE_QUEUE_SIZE];
 182     int subpq_size, subpq_rindex, subpq_windex;
 183     SDL_mutex *subpq_mutex;
 184     SDL_cond *subpq_cond;
 185
 186     double frame_timer;
 187     double frame_last_pts;
 188     double frame_last_delay;
 189     double video_clock;                          ///<pts of last decoded frame / predicted pts of next decoded frame
 190     int video_stream;
 191     AVStream *video_st;
 192     PacketQueue videoq;
 193     double video_current_pts;                    ///<current displayed pts (different from video_clock if frame fifos are used)
 194     double video_current_pts_drift;              ///<video_current_pts - time (av_gettime) at which we updated video_current_pts - used to have running video pts
 195     int64_t video_current_pos;                   ///<current displayed file pos
 196     VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
 197     int pictq_size, pictq_rindex, pictq_windex;
 198     SDL_mutex *pictq_mutex;
 199     SDL_cond *pictq_cond;
 200 #if !CONFIG_AVFILTER
 201     struct SwsContext *img_convert_ctx;
 202 #endif
 203
 204     //    QETimer *video_timer;
 205     char filename[1024];
 206     int width, height, xleft, ytop;
 207
 208     PtsCorrectionContext pts_ctx;
 209
 210 #if CONFIG_AVFILTER
 211     AVFilterContext *out_video_filter;          ///<the last filter in the video chain
 212 #endif
 213
 214     float skip_frames;
 215     float skip_frames_index;
 216     int refresh;
 217 } VideoState;
 218
 219 static void show_help(void);
 220
 221 /* options specified by the user */
 222 static AVInputFormat *file_iformat;
 223 static const char *input_filename;
 224 static const char *window_title;
 225 static int fs_screen_width;
 226 static int fs_screen_height;
 227 static int screen_width = 0;
 228 static int screen_height = 0;
 229 static int audio_disable;
 230 static int video_disable;
 231 static int wanted_stream[AVMEDIA_TYPE_NB]={
 232     [AVMEDIA_TYPE_AUDIO]=-1,
 233     [AVMEDIA_TYPE_VIDEO]=-1,
 234     [AVMEDIA_TYPE_SUBTITLE]=-1,
 235 };
 236 static int seek_by_bytes=-1;
 237 static int display_disable;
 238 static int show_status = 1;
 239 static int av_sync_type = AV_SYNC_AUDIO_MASTER;
 240 static int64_t start_time = AV_NOPTS_VALUE;
 241 static int64_t duration = AV_NOPTS_VALUE;
 242 static int debug = 0;
 243 static int debug_mv = 0;
 244 static int step = 0;
 245 static int thread_count = 1;
 246 static int workaround_bugs = 1;
 247 static int fast = 0;
 248 static int genpts = 0;
 249 static int lowres = 0;
 250 static int idct = FF_IDCT_AUTO;
 251 static enum AVDiscard skip_frame= AVDISCARD_DEFAULT;
 252 static enum AVDiscard skip_idct= AVDISCARD_DEFAULT;
 253 static enum AVDiscard skip_loop_filter= AVDISCARD_DEFAULT;
 254 static int error_recognition = FF_ER_CAREFUL;
 255 static int error_concealment = 3;
 256 static int decoder_reorder_pts= -1;
 257 static int autoexit;
 258 static int exit_on_keydown;
 259 static int exit_on_mousedown;
 260 static int loop=1;
 261 static int framedrop=1;
 262
 263 static int rdftspeed=20;
 264 #if CONFIG_AVFILTER
 265 static char *vfilters = NULL;
 266 #endif
 267
 268 /* current context */
 269 static int is_full_screen;
 270 static VideoState *cur_stream;
 271 static int64_t audio_callback_time;
 272
 273 static AVPacket flush_pkt;
 274
 275 #define FF_ALLOC_EVENT   (SDL_USEREVENT)
 276 #define FF_REFRESH_EVENT (SDL_USEREVENT + 1)
 277 #define FF_QUIT_EVENT    (SDL_USEREVENT + 2)
 278
 279 static SDL_Surface *screen;
 280
 281 static int packet_queue_put(PacketQueue *q, AVPacket *pkt);
 282
 283 /* packet queue handling */
 284 static void packet_queue_init(PacketQueue *q)
 285 {
 286     memset(q, 0, sizeof(PacketQueue));
 287     q->mutex = SDL_CreateMutex();
 288     q->cond = SDL_CreateCond();
 289     packet_queue_put(q, &flush_pkt);
 290 }
 291
 292 static void packet_queue_flush(PacketQueue *q)
 293 {
 294     AVPacketList *pkt, *pkt1;
 295
 296     SDL_LockMutex(q->mutex);
 297     for(pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
 298         pkt1 = pkt->next;
 299         av_free_packet(&pkt->pkt);
 300         av_freep(&pkt);
 301     }
 302     q->last_pkt = NULL;
 303     q->first_pkt = NULL;
 304     q->nb_packets = 0;
 305     q->size = 0;
 306     SDL_UnlockMutex(q->mutex);
 307 }
 308
 309 static void packet_queue_end(PacketQueue *q)
 310 {
 311     packet_queue_flush(q);
 312     SDL_DestroyMutex(q->mutex);
 313     SDL_DestroyCond(q->cond);
 314 }
 315
 316 static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
 317 {
 318     AVPacketList *pkt1;
 319
 320     /* duplicate the packet */
 321     if (pkt!=&flush_pkt && av_dup_packet(pkt) < 0)
 322         return -1;
 323
 324     pkt1 = av_malloc(sizeof(AVPacketList));
 325     if (!pkt1)
 326         return -1;
 327     pkt1->pkt = *pkt;
 328     pkt1->next = NULL;
 329
 330
 331     SDL_LockMutex(q->mutex);
 332
 333     if (!q->last_pkt)
 334
 335         q->first_pkt = pkt1;
 336     else
 337         q->last_pkt->next = pkt1;
 338     q->last_pkt = pkt1;
 339     q->nb_packets++;
 340     q->size += pkt1->pkt.size + sizeof(*pkt1);
 341     /* XXX: should duplicate packet data in DV case */
 342     SDL_CondSignal(q->cond);
 343
 344     SDL_UnlockMutex(q->mutex);
 345     return 0;
 346 }
 347
 348 static void packet_queue_abort(PacketQueue *q)
 349 {
 350     SDL_LockMutex(q->mutex);
 351
 352     q->abort_request = 1;
 353
 354     SDL_CondSignal(q->cond);
 355
 356     SDL_UnlockMutex(q->mutex);
 357 }
 358
 359 /* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
 360 static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block)
 361 {
 362     AVPacketList *pkt1;
 363     int ret;
 364
 365     SDL_LockMutex(q->mutex);
 366
 367     for(;;) {
 368         if (q->abort_request) {
 369             ret = -1;
 370             break;
 371         }
 372
 373         pkt1 = q->first_pkt;
 374         if (pkt1) {
 375             q->first_pkt = pkt1->next;
 376             if (!q->first_pkt)
 377                 q->last_pkt = NULL;
 378             q->nb_packets--;
 379             q->size -= pkt1->pkt.size + sizeof(*pkt1);
 380             *pkt = pkt1->pkt;
 381             av_free(pkt1);
 382             ret = 1;
 383             break;
 384         } else if (!block) {
 385             ret = 0;
 386             break;
 387         } else {
 388             SDL_CondWait(q->cond, q->mutex);
 389         }
 390     }
 391     SDL_UnlockMutex(q->mutex);
 392     return ret;
 393 }
 394
 395 static inline void fill_rectangle(SDL_Surface *screen,
 396                                   int x, int y, int w, int h, int color)
 397 {
 398     SDL_Rect rect;
 399     rect.x = x;
 400     rect.y = y;
 401     rect.w = w;
 402     rect.h = h;
 403     SDL_FillRect(screen, &rect, color);
 404 }
 405
 406 #define ALPHA_BLEND(a, oldp, newp, s)\
 407 ((((oldp << s) * (255 - (a))) + (newp * (a))) / (255 << s))
 408
 409 #define RGBA_IN(r, g, b, a, s)\
 410 {\
 411     unsigned int v = ((const uint32_t *)(s))[0];\
 412     a = (v >> 24) & 0xff;\
 413     r = (v >> 16) & 0xff;\
 414     g = (v >> 8) & 0xff;\
 415     b = v & 0xff;\
 416 }
 417
 418 #define YUVA_IN(y, u, v, a, s, pal)\
 419 {\
 420     unsigned int val = ((const uint32_t *)(pal))[*(const uint8_t*)(s)];\
 421     a = (val >> 24) & 0xff;\
 422     y = (val >> 16) & 0xff;\
 423     u = (val >> 8) & 0xff;\
 424     v = val & 0xff;\
 425 }
 426
 427 #define YUVA_OUT(d, y, u, v, a)\
 428 {\
 429     ((uint32_t *)(d))[0] = (a << 24) | (y << 16) | (u << 8) | v;\
 430 }
 431
 432
 433 #define BPP 1
 434
 435 static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw, int imgh)
 436 {
 437     int wrap, wrap3, width2, skip2;
 438     int y, u, v, a, u1, v1, a1, w, h;
 439     uint8_t *lum, *cb, *cr;
 440     const uint8_t *p;
 441     const uint32_t *pal;
 442     int dstx, dsty, dstw, dsth;
 443
 444     dstw = av_clip(rect->w, 0, imgw);
 445     dsth = av_clip(rect->h, 0, imgh);
 446     dstx = av_clip(rect->x, 0, imgw - dstw);
 447     dsty = av_clip(rect->y, 0, imgh - dsth);
 448     lum = dst->data[0] + dsty * dst->linesize[0];
 449     cb = dst->data[1] + (dsty >> 1) * dst->linesize[1];
 450     cr = dst->data[2] + (dsty >> 1) * dst->linesize[2];
 451
 452     width2 = ((dstw + 1) >> 1) + (dstx & ~dstw & 1);
 453     skip2 = dstx >> 1;
 454     wrap = dst->linesize[0];
 455     wrap3 = rect->pict.linesize[0];
 456     p = rect->pict.data[0];
 457     pal = (const uint32_t *)rect->pict.data[1];  /* Now in YCrCb! */
 458
 459     if (dsty & 1) {
 460         lum += dstx;
 461         cb += skip2;
 462         cr += skip2;
 463
 464         if (dstx & 1) {
 465             YUVA_IN(y, u, v, a, p, pal);
 466             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 467             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
 468             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
 469             cb++;
 470             cr++;
 471             lum++;
 472             p += BPP;
 473         }
 474         for(w = dstw - (dstx & 1); w >= 2; w -= 2) {
 475             YUVA_IN(y, u, v, a, p, pal);
 476             u1 = u;
 477             v1 = v;
 478             a1 = a;
 479             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 480
 481             YUVA_IN(y, u, v, a, p + BPP, pal);
 482             u1 += u;
 483             v1 += v;
 484             a1 += a;
 485             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
 486             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
 487             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
 488             cb++;
 489             cr++;
 490             p += 2 * BPP;
 491             lum += 2;
 492         }
 493         if (w) {
 494             YUVA_IN(y, u, v, a, p, pal);
 495             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 496             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
 497             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
 498             p++;
 499             lum++;
 500         }
 501         p += wrap3 - dstw * BPP;
 502         lum += wrap - dstw - dstx;
 503         cb += dst->linesize[1] - width2 - skip2;
 504         cr += dst->linesize[2] - width2 - skip2;
 505     }
 506     for(h = dsth - (dsty & 1); h >= 2; h -= 2) {
 507         lum += dstx;
 508         cb += skip2;
 509         cr += skip2;
 510
 511         if (dstx & 1) {
 512             YUVA_IN(y, u, v, a, p, pal);
 513             u1 = u;
 514             v1 = v;
 515             a1 = a;
 516             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 517             p += wrap3;
 518             lum += wrap;
 519             YUVA_IN(y, u, v, a, p, pal);
 520             u1 += u;
 521             v1 += v;
 522             a1 += a;
 523             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 524             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
 525             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
 526             cb++;
 527             cr++;
 528             p += -wrap3 + BPP;
 529             lum += -wrap + 1;
 530         }
 531         for(w = dstw - (dstx & 1); w >= 2; w -= 2) {
 532             YUVA_IN(y, u, v, a, p, pal);
 533             u1 = u;
 534             v1 = v;
 535             a1 = a;
 536             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 537
 538             YUVA_IN(y, u, v, a, p + BPP, pal);
 539             u1 += u;
 540             v1 += v;
 541             a1 += a;
 542             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
 543             p += wrap3;
 544             lum += wrap;
 545
 546             YUVA_IN(y, u, v, a, p, pal);
 547             u1 += u;
 548             v1 += v;
 549             a1 += a;
 550             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 551
 552             YUVA_IN(y, u, v, a, p + BPP, pal);
 553             u1 += u;
 554             v1 += v;
 555             a1 += a;
 556             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
 557
 558             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 2);
 559             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 2);
 560
 561             cb++;
 562             cr++;
 563             p += -wrap3 + 2 * BPP;
 564             lum += -wrap + 2;
 565         }
 566         if (w) {
 567             YUVA_IN(y, u, v, a, p, pal);
 568             u1 = u;
 569             v1 = v;
 570             a1 = a;
 571             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 572             p += wrap3;
 573             lum += wrap;
 574             YUVA_IN(y, u, v, a, p, pal);
 575             u1 += u;
 576             v1 += v;
 577             a1 += a;
 578             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 579             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
 580             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
 581             cb++;
 582             cr++;
 583             p += -wrap3 + BPP;
 584             lum += -wrap + 1;
 585         }
 586         p += wrap3 + (wrap3 - dstw * BPP);
 587         lum += wrap + (wrap - dstw - dstx);
 588         cb += dst->linesize[1] - width2 - skip2;
 589         cr += dst->linesize[2] - width2 - skip2;
 590     }
 591     /* handle odd height */
 592     if (h) {
 593         lum += dstx;
 594         cb += skip2;
 595         cr += skip2;
 596
 597         if (dstx & 1) {
 598             YUVA_IN(y, u, v, a, p, pal);
 599             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 600             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
 601             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
 602             cb++;
 603             cr++;
 604             lum++;
 605             p += BPP;
 606         }
 607         for(w = dstw - (dstx & 1); w >= 2; w -= 2) {
 608             YUVA_IN(y, u, v, a, p, pal);
 609             u1 = u;
 610             v1 = v;
 611             a1 = a;
 612             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 613
 614             YUVA_IN(y, u, v, a, p + BPP, pal);
 615             u1 += u;
 616             v1 += v;
 617             a1 += a;
 618             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
 619             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u, 1);
 620             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v, 1);
 621             cb++;
 622             cr++;
 623             p += 2 * BPP;
 624             lum += 2;
 625         }
 626         if (w) {
 627             YUVA_IN(y, u, v, a, p, pal);
 628             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 629             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
 630             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
 631         }
 632     }
 633 }
 634
 635 static void free_subpicture(SubPicture *sp)
 636 {
 637     avsubtitle_free(&sp->sub);
 638 }
 639
 640 static void video_image_display(VideoState *is)
 641 {
 642     VideoPicture *vp;
 643     SubPicture *sp;
 644     AVPicture pict;
 645     float aspect_ratio;
 646     int width, height, x, y;
 647     SDL_Rect rect;
 648     int i;
 649
 650     vp = &is->pictq[is->pictq_rindex];
 651     if (vp->bmp) {
 652 #if CONFIG_AVFILTER
 653          if (vp->picref->video->pixel_aspect.num == 0)
 654              aspect_ratio = 0;
 655          else
 656              aspect_ratio = av_q2d(vp->picref->video->pixel_aspect);
 657 #else
 658
 659         /* XXX: use variable in the frame */
 660         if (is->video_st->sample_aspect_ratio.num)
 661             aspect_ratio = av_q2d(is->video_st->sample_aspect_ratio);
 662         else if (is->video_st->codec->sample_aspect_ratio.num)
 663             aspect_ratio = av_q2d(is->video_st->codec->sample_aspect_ratio);
 664         else
 665             aspect_ratio = 0;
 666 #endif
 667         if (aspect_ratio <= 0.0)
 668             aspect_ratio = 1.0;
 669         aspect_ratio *= (float)vp->width / (float)vp->height;
 670
 671         if (is->subtitle_st)
 672         {
 673             if (is->subpq_size > 0)
 674             {
 675                 sp = &is->subpq[is->subpq_rindex];
 676
 677                 if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000))
 678                 {
 679                     SDL_LockYUVOverlay (vp->bmp);
 680
 681                     pict.data[0] = vp->bmp->pixels[0];
 682                     pict.data[1] = vp->bmp->pixels[2];
 683                     pict.data[2] = vp->bmp->pixels[1];
 684
 685                     pict.linesize[0] = vp->bmp->pitches[0];
 686                     pict.linesize[1] = vp->bmp->pitches[2];
 687                     pict.linesize[2] = vp->bmp->pitches[1];
 688
 689                     for (i = 0; i < sp->sub.num_rects; i++)
 690                         blend_subrect(&pict, sp->sub.rects[i],
 691                                       vp->bmp->w, vp->bmp->h);
 692
 693                     SDL_UnlockYUVOverlay (vp->bmp);
 694                 }
 695             }
 696         }
 697
 698
 699         /* XXX: we suppose the screen has a 1.0 pixel ratio */
 700         height = is->height;
 701         width = ((int)rint(height * aspect_ratio)) & ~1;
 702         if (width > is->width) {
 703             width = is->width;
 704             height = ((int)rint(width / aspect_ratio)) & ~1;
 705         }
 706         x = (is->width - width) / 2;
 707         y = (is->height - height) / 2;
 708         is->no_background = 0;
 709         rect.x = is->xleft + x;
 710         rect.y = is->ytop  + y;
 711         rect.w = width;
 712         rect.h = height;
 713         SDL_DisplayYUVOverlay(vp->bmp, &rect);
 714     }
 715 }
 716
 717 /* get the current audio output buffer size, in samples. With SDL, we
 718    cannot have a precise information */
 719 static int audio_write_get_buf_size(VideoState *is)
 720 {
 721     return is->audio_buf_size - is->audio_buf_index;
 722 }
 723
 724 static inline int compute_mod(int a, int b)
 725 {
 726     a = a % b;
 727     if (a >= 0)
 728         return a;
 729     else
 730         return a + b;
 731 }
 732
 733 static void video_audio_display(VideoState *s)
 734 {
 735     int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
 736     int ch, channels, h, h2, bgcolor, fgcolor;
 737     int16_t time_diff;
 738     int rdft_bits, nb_freq;
 739
 740     for(rdft_bits=1; (1<<rdft_bits)<2*s->height; rdft_bits++)
 741         ;
 742     nb_freq= 1<<(rdft_bits-1);
 743
 744     /* compute display index : center on currently output samples */
 745     channels = s->audio_st->codec->channels;
 746     nb_display_channels = channels;
 747     if (!s->paused) {
 748         int data_used= s->show_audio==1 ? s->width : (2*nb_freq);
 749         n = 2 * channels;
 750         delay = audio_write_get_buf_size(s);
 751         delay /= n;
 752
 753         /* to be more precise, we take into account the time spent since
 754            the last buffer computation */
 755         if (audio_callback_time) {
 756             time_diff = av_gettime() - audio_callback_time;
 757             delay -= (time_diff * s->audio_st->codec->sample_rate) / 1000000;
 758         }
 759
 760         delay += 2*data_used;
 761         if (delay < data_used)
 762             delay = data_used;
 763
 764         i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
 765         if(s->show_audio==1){
 766             h= INT_MIN;
 767             for(i=0; i<1000; i+=channels){
 768                 int idx= (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
 769                 int a= s->sample_array[idx];
 770                 int b= s->sample_array[(idx + 4*channels)%SAMPLE_ARRAY_SIZE];
 771                 int c= s->sample_array[(idx + 5*channels)%SAMPLE_ARRAY_SIZE];
 772                 int d= s->sample_array[(idx + 9*channels)%SAMPLE_ARRAY_SIZE];
 773                 int score= a-d;
 774                 if(h<score && (b^c)<0){
 775                     h= score;
 776                     i_start= idx;
 777                 }
 778             }
 779         }
 780
 781         s->last_i_start = i_start;
 782     } else {
 783         i_start = s->last_i_start;
 784     }
 785
 786     bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
 787     if(s->show_audio==1){
 788         fill_rectangle(screen,
 789                        s->xleft, s->ytop, s->width, s->height,
 790                        bgcolor);
 791
 792         fgcolor = SDL_MapRGB(screen->format, 0xff, 0xff, 0xff);
 793
 794         /* total height for one channel */
 795         h = s->height / nb_display_channels;
 796         /* graph height / 2 */
 797         h2 = (h * 9) / 20;
 798         for(ch = 0;ch < nb_display_channels; ch++) {
 799             i = i_start + ch;
 800             y1 = s->ytop + ch * h + (h / 2); /* position of center line */
 801             for(x = 0; x < s->width; x++) {
 802                 y = (s->sample_array[i] * h2) >> 15;
 803                 if (y < 0) {
 804                     y = -y;
 805                     ys = y1 - y;
 806                 } else {
 807                     ys = y1;
 808                 }
 809                 fill_rectangle(screen,
 810                                s->xleft + x, ys, 1, y,
 811                                fgcolor);
 812                 i += channels;
 813                 if (i >= SAMPLE_ARRAY_SIZE)
 814                     i -= SAMPLE_ARRAY_SIZE;
 815             }
 816         }
 817
 818         fgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0xff);
 819
 820         for(ch = 1;ch < nb_display_channels; ch++) {
 821             y = s->ytop + ch * h;
 822             fill_rectangle(screen,
 823                            s->xleft, y, s->width, 1,
 824                            fgcolor);
 825         }
 826         SDL_UpdateRect(screen, s->xleft, s->ytop, s->width, s->height);
 827     }else{
 828         nb_display_channels= FFMIN(nb_display_channels, 2);
 829         if(rdft_bits != s->rdft_bits){
 830             av_rdft_end(s->rdft);
 831             av_free(s->rdft_data);
 832             s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
 833             s->rdft_bits= rdft_bits;
 834             s->rdft_data= av_malloc(4*nb_freq*sizeof(*s->rdft_data));
 835         }
 836         {
 837             FFTSample *data[2];
 838             for(ch = 0;ch < nb_display_channels; ch++) {
 839                 data[ch] = s->rdft_data + 2*nb_freq*ch;
 840                 i = i_start + ch;
 841                 for(x = 0; x < 2*nb_freq; x++) {
 842                     double w= (x-nb_freq)*(1.0/nb_freq);
 843                     data[ch][x]= s->sample_array[i]*(1.0-w*w);
 844                     i += channels;
 845                     if (i >= SAMPLE_ARRAY_SIZE)
 846                         i -= SAMPLE_ARRAY_SIZE;
 847                 }
 848                 av_rdft_calc(s->rdft, data[ch]);
 849             }
 850             //least efficient way to do this, we should of course directly access it but its more than fast enough
 851             for(y=0; y<s->height; y++){
 852                 double w= 1/sqrt(nb_freq);
 853                 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]));
 854                 int b= (nb_display_channels == 2 ) ? sqrt(w*sqrt(data[1][2*y+0]*data[1][2*y+0]
 855                        + data[1][2*y+1]*data[1][2*y+1])) : a;
 856                 a= FFMIN(a,255);
 857                 b= FFMIN(b,255);
 858                 fgcolor = SDL_MapRGB(screen->format, a, b, (a+b)/2);
 859
 860                 fill_rectangle(screen,
 861                             s->xpos, s->height-y, 1, 1,
 862                             fgcolor);
 863             }
 864         }
 865         SDL_UpdateRect(screen, s->xpos, s->ytop, 1, s->height);
 866         s->xpos++;
 867         if(s->xpos >= s->width)
 868             s->xpos= s->xleft;
 869     }
 870 }
 871
 872 static int video_open(VideoState *is){
 873     int flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
 874     int w,h;
 875
 876     if(is_full_screen) flags |= SDL_FULLSCREEN;
 877     else               flags |= SDL_RESIZABLE;
 878
 879     if (is_full_screen && fs_screen_width) {
 880         w = fs_screen_width;
 881         h = fs_screen_height;
 882     } else if(!is_full_screen && screen_width){
 883         w = screen_width;
 884         h = screen_height;
 885 #if CONFIG_AVFILTER
 886     }else if (is->out_video_filter && is->out_video_filter->inputs[0]){
 887         w = is->out_video_filter->inputs[0]->w;
 888         h = is->out_video_filter->inputs[0]->h;
 889 #else
 890     }else if (is->video_st && is->video_st->codec->width){
 891         w = is->video_st->codec->width;
 892         h = is->video_st->codec->height;
 893 #endif
 894     } else {
 895         w = 640;
 896         h = 480;
 897     }
 898     if(screen && is->width == screen->w && screen->w == w
 899        && is->height== screen->h && screen->h == h)
 900         return 0;
 901
 902 #ifndef __APPLE__
 903     screen = SDL_SetVideoMode(w, h, 0, flags);
 904 #else
 905     /* setting bits_per_pixel = 0 or 32 causes blank video on OS X */
 906     screen = SDL_SetVideoMode(w, h, 24, flags);
 907 #endif
 908     if (!screen) {
 909         fprintf(stderr, "SDL: could not set video mode - exiting\n");
 910         return -1;
 911     }
 912     if (!window_title)
 913         window_title = input_filename;
 914     SDL_WM_SetCaption(window_title, window_title);
 915
 916     is->width = screen->w;
 917     is->height = screen->h;
 918
 919     return 0;
 920 }
 921
 922 /* display the current picture, if any */
 923 static void video_display(VideoState *is)
 924 {
 925     if(!screen)
 926         video_open(cur_stream);
 927     if (is->audio_st && is->show_audio)
 928         video_audio_display(is);
 929     else if (is->video_st)
 930         video_image_display(is);
 931 }
 932
 933 static int refresh_thread(void *opaque)
 934 {
 935     VideoState *is= opaque;
 936     while(!is->abort_request){
 937         SDL_Event event;
 938         event.type = FF_REFRESH_EVENT;
 939         event.user.data1 = opaque;
 940         if(!is->refresh){
 941             is->refresh=1;
 942             SDL_PushEvent(&event);
 943         }
 944         usleep(is->audio_st && is->show_audio ? rdftspeed*1000 : 5000); //FIXME ideally we should wait the correct time but SDLs event passing is so slow it would be silly
 945     }
 946     return 0;
 947 }
 948
 949 /* get the current audio clock value */
 950 static double get_audio_clock(VideoState *is)
 951 {
 952     double pts;
 953     int hw_buf_size, bytes_per_sec;
 954     pts = is->audio_clock;
 955     hw_buf_size = audio_write_get_buf_size(is);
 956     bytes_per_sec = 0;
 957     if (is->audio_st) {
 958         bytes_per_sec = is->audio_st->codec->sample_rate *
 959             2 * is->audio_st->codec->channels;
 960     }
 961     if (bytes_per_sec)
 962         pts -= (double)hw_buf_size / bytes_per_sec;
 963     return pts;
 964 }
 965
 966 /* get the current video clock value */
 967 static double get_video_clock(VideoState *is)
 968 {
 969     if (is->paused) {
 970         return is->video_current_pts;
 971     } else {
 972         return is->video_current_pts_drift + av_gettime() / 1000000.0;
 973     }
 974 }
 975
 976 /* get the current external clock value */
 977 static double get_external_clock(VideoState *is)
 978 {
 979     int64_t ti;
 980     ti = av_gettime();
 981     return is->external_clock + ((ti - is->external_clock_time) * 1e-6);
 982 }
 983
 984 /* get the current master clock value */
 985 static double get_master_clock(VideoState *is)
 986 {
 987     double val;
 988
 989     if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
 990         if (is->video_st)
 991             val = get_video_clock(is);
 992         else
 993             val = get_audio_clock(is);
 994     } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
 995         if (is->audio_st)
 996             val = get_audio_clock(is);
 997         else
 998             val = get_video_clock(is);
 999     } else {
1000         val = get_external_clock(is);
1001     }
1002     return val;
1003 }
1004
1005 /* seek in the stream */
1006 static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_bytes)
1007 {
1008     if (!is->seek_req) {
1009         is->seek_pos = pos;
1010         is->seek_rel = rel;
1011         is->seek_flags &= ~AVSEEK_FLAG_BYTE;
1012         if (seek_by_bytes)
1013             is->seek_flags |= AVSEEK_FLAG_BYTE;
1014         is->seek_req = 1;
1015     }
1016 }
1017
1018 /* pause or resume the video */
1019 static void stream_pause(VideoState *is)
1020 {
1021     if (is->paused) {
1022         is->frame_timer += av_gettime() / 1000000.0 + is->video_current_pts_drift - is->video_current_pts;
1023         if(is->read_pause_return != AVERROR(ENOSYS)){
1024             is->video_current_pts = is->video_current_pts_drift + av_gettime() / 1000000.0;
1025         }
1026         is->video_current_pts_drift = is->video_current_pts - av_gettime() / 1000000.0;
1027     }
1028     is->paused = !is->paused;
1029 }
1030
1031 static double compute_target_time(double frame_current_pts, VideoState *is)
1032 {
1033     double delay, sync_threshold, diff;
1034
1035     /* compute nominal delay */
1036     delay = frame_current_pts - is->frame_last_pts;
1037     if (delay <= 0 || delay >= 10.0) {
1038         /* if incorrect delay, use previous one */
1039         delay = is->frame_last_delay;
1040     } else {
1041         is->frame_last_delay = delay;
1042     }
1043     is->frame_last_pts = frame_current_pts;
1044
1045     /* update delay to follow master synchronisation source */
1046     if (((is->av_sync_type == AV_SYNC_AUDIO_MASTER && is->audio_st) ||
1047          is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)) {
1048         /* if video is slave, we try to correct big delays by
1049            duplicating or deleting a frame */
1050         diff = get_video_clock(is) - get_master_clock(is);
1051
1052         /* skip or repeat frame. We take into account the
1053            delay to compute the threshold. I still don't know
1054            if it is the best guess */
1055         sync_threshold = FFMAX(AV_SYNC_THRESHOLD, delay);
1056         if (fabs(diff) < AV_NOSYNC_THRESHOLD) {
1057             if (diff <= -sync_threshold)
1058                 delay = 0;
1059             else if (diff >= sync_threshold)
1060                 delay = 2 * delay;
1061         }
1062     }
1063     is->frame_timer += delay;
1064
1065     av_dlog(NULL, "video: delay=%0.3f pts=%0.3f A-V=%f\n",
1066             delay, frame_current_pts, -diff);
1067
1068     return is->frame_timer;
1069 }
1070
1071 /* called to display each frame */
1072 static void video_refresh_timer(void *opaque)
1073 {
1074     VideoState *is = opaque;
1075     VideoPicture *vp;
1076
1077     SubPicture *sp, *sp2;
1078
1079     if (is->video_st) {
1080 retry:
1081         if (is->pictq_size == 0) {
1082             //nothing to do, no picture to display in the que
1083         } else {
1084             double time= av_gettime()/1000000.0;
1085             double next_target;
1086             /* dequeue the picture */
1087             vp = &is->pictq[is->pictq_rindex];
1088
1089             if(time < vp->target_clock)
1090                 return;
1091             /* update current video pts */
1092             is->video_current_pts = vp->pts;
1093             is->video_current_pts_drift = is->video_current_pts - time;
1094             is->video_current_pos = vp->pos;
1095             if(is->pictq_size > 1){
1096                 VideoPicture *nextvp= &is->pictq[(is->pictq_rindex+1)%VIDEO_PICTURE_QUEUE_SIZE];
1097                 assert(nextvp->target_clock >= vp->target_clock);
1098                 next_target= nextvp->target_clock;
1099             }else{
1100                 next_target= vp->target_clock + is->video_clock - vp->pts; //FIXME pass durations cleanly
1101             }
1102             if(framedrop && time > next_target){
1103                 is->skip_frames *= 1.0 + FRAME_SKIP_FACTOR;
1104                 if(is->pictq_size > 1 || time > next_target + 0.5){
1105                     /* update queue size and signal for next picture */
1106                     if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
1107                         is->pictq_rindex = 0;
1108
1109                     SDL_LockMutex(is->pictq_mutex);
1110                     is->pictq_size--;
1111                     SDL_CondSignal(is->pictq_cond);
1112                     SDL_UnlockMutex(is->pictq_mutex);
1113                     goto retry;
1114                 }
1115             }
1116
1117             if(is->subtitle_st) {
1118                 if (is->subtitle_stream_changed) {
1119                     SDL_LockMutex(is->subpq_mutex);
1120
1121                     while (is->subpq_size) {
1122                         free_subpicture(&is->subpq[is->subpq_rindex]);
1123
1124                         /* update queue size and signal for next picture */
1125                         if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
1126                             is->subpq_rindex = 0;
1127
1128                         is->subpq_size--;
1129                     }
1130                     is->subtitle_stream_changed = 0;
1131
1132                     SDL_CondSignal(is->subpq_cond);
1133                     SDL_UnlockMutex(is->subpq_mutex);
1134                 } else {
1135                     if (is->subpq_size > 0) {
1136                         sp = &is->subpq[is->subpq_rindex];
1137
1138                         if (is->subpq_size > 1)
1139                             sp2 = &is->subpq[(is->subpq_rindex + 1) % SUBPICTURE_QUEUE_SIZE];
1140                         else
1141                             sp2 = NULL;
1142
1143                         if ((is->video_current_pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
1144                                 || (sp2 && is->video_current_pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
1145                         {
1146                             free_subpicture(sp);
1147
1148                             /* update queue size and signal for next picture */
1149                             if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
1150                                 is->subpq_rindex = 0;
1151
1152                             SDL_LockMutex(is->subpq_mutex);
1153                             is->subpq_size--;
1154                             SDL_CondSignal(is->subpq_cond);
1155                             SDL_UnlockMutex(is->subpq_mutex);
1156                         }
1157                     }
1158                 }
1159             }
1160
1161             /* display picture */
1162             if (!display_disable)
1163                 video_display(is);
1164
1165             /* update queue size and signal for next picture */
1166             if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
1167                 is->pictq_rindex = 0;
1168
1169             SDL_LockMutex(is->pictq_mutex);
1170             is->pictq_size--;
1171             SDL_CondSignal(is->pictq_cond);
1172             SDL_UnlockMutex(is->pictq_mutex);
1173         }
1174     } else if (is->audio_st) {
1175         /* draw the next audio frame */
1176
1177         /* if only audio stream, then display the audio bars (better
1178            than nothing, just to test the implementation */
1179
1180         /* display picture */
1181         if (!display_disable)
1182             video_display(is);
1183     }
1184     if (show_status) {
1185         static int64_t last_time;
1186         int64_t cur_time;
1187         int aqsize, vqsize, sqsize;
1188         double av_diff;
1189
1190         cur_time = av_gettime();
1191         if (!last_time || (cur_time - last_time) >= 30000) {
1192             aqsize = 0;
1193             vqsize = 0;
1194             sqsize = 0;
1195             if (is->audio_st)
1196                 aqsize = is->audioq.size;
1197             if (is->video_st)
1198                 vqsize = is->videoq.size;
1199             if (is->subtitle_st)
1200                 sqsize = is->subtitleq.size;
1201             av_diff = 0;
1202             if (is->audio_st && is->video_st)
1203                 av_diff = get_audio_clock(is) - get_video_clock(is);
1204             printf("%7.2f A-V:%7.3f s:%3.1f aq=%5dKB vq=%5dKB sq=%5dB f=%"PRId64"/%"PRId64"   \r",
1205                    get_master_clock(is), av_diff, FFMAX(is->skip_frames-1, 0), aqsize / 1024, vqsize / 1024, sqsize, is->pts_ctx.num_faulty_dts, is->pts_ctx.num_faulty_pts);
1206             fflush(stdout);
1207             last_time = cur_time;
1208         }
1209     }
1210 }
1211
1212 static void stream_close(VideoState *is)
1213 {
1214     VideoPicture *vp;
1215     int i;
1216     /* XXX: use a special url_shutdown call to abort parse cleanly */
1217     is->abort_request = 1;
1218     SDL_WaitThread(is->parse_tid, NULL);
1219     SDL_WaitThread(is->refresh_tid, NULL);
1220
1221     /* free all pictures */
1222     for(i=0;i<VIDEO_PICTURE_QUEUE_SIZE; i++) {
1223         vp = &is->pictq[i];
1224 #if CONFIG_AVFILTER
1225         if (vp->picref) {
1226             avfilter_unref_buffer(vp->picref);
1227             vp->picref = NULL;
1228         }
1229 #endif
1230         if (vp->bmp) {
1231             SDL_FreeYUVOverlay(vp->bmp);
1232             vp->bmp = NULL;
1233         }
1234     }
1235     SDL_DestroyMutex(is->pictq_mutex);
1236     SDL_DestroyCond(is->pictq_cond);
1237     SDL_DestroyMutex(is->subpq_mutex);
1238     SDL_DestroyCond(is->subpq_cond);
1239 #if !CONFIG_AVFILTER
1240     if (is->img_convert_ctx)
1241         sws_freeContext(is->img_convert_ctx);
1242 #endif
1243     av_free(is);
1244 }
1245
1246 static void do_exit(void)
1247 {
1248     if (cur_stream) {
1249         stream_close(cur_stream);
1250         cur_stream = NULL;
1251     }
1252     uninit_opts();
1253 #if CONFIG_AVFILTER
1254     avfilter_uninit();
1255 #endif
1256     if (show_status)
1257         printf("\n");
1258     SDL_Quit();
1259     av_log(NULL, AV_LOG_QUIET, "");
1260     exit(0);
1261 }
1262
1263 /* allocate a picture (needs to do that in main thread to avoid
1264    potential locking problems */
1265 static void alloc_picture(void *opaque)
1266 {
1267     VideoState *is = opaque;
1268     VideoPicture *vp;
1269
1270     vp = &is->pictq[is->pictq_windex];
1271
1272     if (vp->bmp)
1273         SDL_FreeYUVOverlay(vp->bmp);
1274
1275 #if CONFIG_AVFILTER
1276     if (vp->picref)
1277         avfilter_unref_buffer(vp->picref);
1278     vp->picref = NULL;
1279
1280     vp->width   = is->out_video_filter->inputs[0]->w;
1281     vp->height  = is->out_video_filter->inputs[0]->h;
1282     vp->pix_fmt = is->out_video_filter->inputs[0]->format;
1283 #else
1284     vp->width   = is->video_st->codec->width;
1285     vp->height  = is->video_st->codec->height;
1286     vp->pix_fmt = is->video_st->codec->pix_fmt;
1287 #endif
1288
1289     vp->bmp = SDL_CreateYUVOverlay(vp->width, vp->height,
1290                                    SDL_YV12_OVERLAY,
1291                                    screen);
1292     if (!vp->bmp || vp->bmp->pitches[0] < vp->width) {
1293         /* SDL allocates a buffer smaller than requested if the video
1294          * overlay hardware is unable to support the requested size. */
1295         fprintf(stderr, "Error: the video system does not support an image\n"
1296                         "size of %dx%d pixels. Try using -lowres or -vf \"scale=w:h\"\n"
1297                         "to reduce the image size.\n", vp->width, vp->height );
1298         do_exit();
1299     }
1300
1301     SDL_LockMutex(is->pictq_mutex);
1302     vp->allocated = 1;
1303     SDL_CondSignal(is->pictq_cond);
1304     SDL_UnlockMutex(is->pictq_mutex);
1305 }
1306
1307 /**
1308  *
1309  * @param pts the dts of the pkt / pts of the frame and guessed if not known
1310  */
1311 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts, int64_t pos)
1312 {
1313     VideoPicture *vp;
1314 #if CONFIG_AVFILTER
1315     AVPicture pict_src;
1316 #else
1317     int dst_pix_fmt = PIX_FMT_YUV420P;
1318 #endif
1319     /* wait until we have space to put a new picture */
1320     SDL_LockMutex(is->pictq_mutex);
1321
1322     if(is->pictq_size>=VIDEO_PICTURE_QUEUE_SIZE && !is->refresh)
1323         is->skip_frames= FFMAX(1.0 - FRAME_SKIP_FACTOR, is->skip_frames * (1.0-FRAME_SKIP_FACTOR));
1324
1325     while (is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE &&
1326            !is->videoq.abort_request) {
1327         SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1328     }
1329     SDL_UnlockMutex(is->pictq_mutex);
1330
1331     if (is->videoq.abort_request)
1332         return -1;
1333
1334     vp = &is->pictq[is->pictq_windex];
1335
1336     /* alloc or resize hardware picture buffer */
1337     if (!vp->bmp ||
1338 #if CONFIG_AVFILTER
1339         vp->width  != is->out_video_filter->inputs[0]->w ||
1340         vp->height != is->out_video_filter->inputs[0]->h) {
1341 #else
1342         vp->width != is->video_st->codec->width ||
1343         vp->height != is->video_st->codec->height) {
1344 #endif
1345         SDL_Event event;
1346
1347         vp->allocated = 0;
1348
1349         /* the allocation must be done in the main thread to avoid
1350            locking problems */
1351         event.type = FF_ALLOC_EVENT;
1352         event.user.data1 = is;
1353         SDL_PushEvent(&event);
1354
1355         /* wait until the picture is allocated */
1356         SDL_LockMutex(is->pictq_mutex);
1357         while (!vp->allocated && !is->videoq.abort_request) {
1358             SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1359         }
1360         SDL_UnlockMutex(is->pictq_mutex);
1361
1362         if (is->videoq.abort_request)
1363             return -1;
1364     }
1365
1366     /* if the frame is not skipped, then display it */
1367     if (vp->bmp) {
1368         AVPicture pict;
1369 #if CONFIG_AVFILTER
1370         if(vp->picref)
1371             avfilter_unref_buffer(vp->picref);
1372         vp->picref = src_frame->opaque;
1373 #endif
1374
1375         /* get a pointer on the bitmap */
1376         SDL_LockYUVOverlay (vp->bmp);
1377
1378         memset(&pict,0,sizeof(AVPicture));
1379         pict.data[0] = vp->bmp->pixels[0];
1380         pict.data[1] = vp->bmp->pixels[2];
1381         pict.data[2] = vp->bmp->pixels[1];
1382
1383         pict.linesize[0] = vp->bmp->pitches[0];
1384         pict.linesize[1] = vp->bmp->pitches[2];
1385         pict.linesize[2] = vp->bmp->pitches[1];
1386
1387 #if CONFIG_AVFILTER
1388         pict_src.data[0] = src_frame->data[0];
1389         pict_src.data[1] = src_frame->data[1];
1390         pict_src.data[2] = src_frame->data[2];
1391
1392         pict_src.linesize[0] = src_frame->linesize[0];
1393         pict_src.linesize[1] = src_frame->linesize[1];
1394         pict_src.linesize[2] = src_frame->linesize[2];
1395
1396         //FIXME use direct rendering
1397         av_picture_copy(&pict, &pict_src,
1398                         vp->pix_fmt, vp->width, vp->height);
1399 #else
1400         sws_flags = av_get_int(sws_opts, "sws_flags", NULL);
1401         is->img_convert_ctx = sws_getCachedContext(is->img_convert_ctx,
1402             vp->width, vp->height, vp->pix_fmt, vp->width, vp->height,
1403             dst_pix_fmt, sws_flags, NULL, NULL, NULL);
1404         if (is->img_convert_ctx == NULL) {
1405             fprintf(stderr, "Cannot initialize the conversion context\n");
1406             exit(1);
1407         }
1408         sws_scale(is->img_convert_ctx, src_frame->data, src_frame->linesize,
1409                   0, vp->height, pict.data, pict.linesize);
1410 #endif
1411         /* update the bitmap content */
1412         SDL_UnlockYUVOverlay(vp->bmp);
1413
1414         vp->pts = pts;
1415         vp->pos = pos;
1416
1417         /* now we can update the picture count */
1418         if (++is->pictq_windex == VIDEO_PICTURE_QUEUE_SIZE)
1419             is->pictq_windex = 0;
1420         SDL_LockMutex(is->pictq_mutex);
1421         vp->target_clock= compute_target_time(vp->pts, is);
1422
1423         is->pictq_size++;
1424         SDL_UnlockMutex(is->pictq_mutex);
1425     }
1426     return 0;
1427 }
1428
1429 /**
1430  * compute the exact PTS for the picture if it is omitted in the stream
1431  * @param pts1 the dts of the pkt / pts of the frame
1432  */
1433 static int output_picture2(VideoState *is, AVFrame *src_frame, double pts1, int64_t pos)
1434 {
1435     double frame_delay, pts;
1436
1437     pts = pts1;
1438
1439     if (pts != 0) {
1440         /* update video clock with pts, if present */
1441         is->video_clock = pts;
1442     } else {
1443         pts = is->video_clock;
1444     }
1445     /* update video clock for next frame */
1446     frame_delay = av_q2d(is->video_st->codec->time_base);
1447     /* for MPEG2, the frame can be repeated, so we update the
1448        clock accordingly */
1449     frame_delay += src_frame->repeat_pict * (frame_delay * 0.5);
1450     is->video_clock += frame_delay;
1451
1452     return queue_picture(is, src_frame, pts, pos);
1453 }
1454
1455 static int get_video_frame(VideoState *is, AVFrame *frame, int64_t *pts, AVPacket *pkt)
1456 {
1457     int got_picture, i;
1458
1459     if (packet_queue_get(&is->videoq, pkt, 1) < 0)
1460         return -1;
1461
1462     if (pkt->data == flush_pkt.data) {
1463         avcodec_flush_buffers(is->video_st->codec);
1464
1465         SDL_LockMutex(is->pictq_mutex);
1466         //Make sure there are no long delay timers (ideally we should just flush the que but thats harder)
1467         for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++) {
1468             is->pictq[i].target_clock= 0;
1469         }
1470         while (is->pictq_size && !is->videoq.abort_request) {
1471             SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1472         }
1473         is->video_current_pos = -1;
1474         SDL_UnlockMutex(is->pictq_mutex);
1475
1476         init_pts_correction(&is->pts_ctx);
1477         is->frame_last_pts = AV_NOPTS_VALUE;
1478         is->frame_last_delay = 0;
1479         is->frame_timer = (double)av_gettime() / 1000000.0;
1480         is->skip_frames = 1;
1481         is->skip_frames_index = 0;
1482         return 0;
1483     }
1484
1485     avcodec_decode_video2(is->video_st->codec, frame, &got_picture, pkt);
1486
1487     if (got_picture) {
1488         if (decoder_reorder_pts == -1) {
1489             *pts = guess_correct_pts(&is->pts_ctx, frame->pkt_pts, frame->pkt_dts);
1490         } else if (decoder_reorder_pts) {
1491             *pts = frame->pkt_pts;
1492         } else {
1493             *pts = frame->pkt_dts;
1494         }
1495
1496         if (*pts == AV_NOPTS_VALUE) {
1497             *pts = 0;
1498         }
1499
1500         is->skip_frames_index += 1;
1501         if(is->skip_frames_index >= is->skip_frames){
1502             is->skip_frames_index -= FFMAX(is->skip_frames, 1.0);
1503             return 1;
1504         }
1505
1506     }
1507     return 0;
1508 }
1509
1510 #if CONFIG_AVFILTER
1511 typedef struct {
1512     VideoState *is;
1513     AVFrame *frame;
1514     int use_dr1;
1515 } FilterPriv;
1516
1517 static int input_get_buffer(AVCodecContext *codec, AVFrame *pic)
1518 {
1519     AVFilterContext *ctx = codec->opaque;
1520     AVFilterBufferRef  *ref;
1521     int perms = AV_PERM_WRITE;
1522     int i, w, h, stride[4];
1523     unsigned edge;
1524     int pixel_size;
1525
1526     if (codec->codec->capabilities & CODEC_CAP_NEG_LINESIZES)
1527         perms |= AV_PERM_NEG_LINESIZES;
1528
1529     if(pic->buffer_hints & FF_BUFFER_HINTS_VALID) {
1530         if(pic->buffer_hints & FF_BUFFER_HINTS_READABLE) perms |= AV_PERM_READ;
1531         if(pic->buffer_hints & FF_BUFFER_HINTS_PRESERVE) perms |= AV_PERM_PRESERVE;
1532         if(pic->buffer_hints & FF_BUFFER_HINTS_REUSABLE) perms |= AV_PERM_REUSE2;
1533     }
1534     if(pic->reference) perms |= AV_PERM_READ | AV_PERM_PRESERVE;
1535
1536     w = codec->width;
1537     h = codec->height;
1538     avcodec_align_dimensions2(codec, &w, &h, stride);
1539     edge = codec->flags & CODEC_FLAG_EMU_EDGE ? 0 : avcodec_get_edge_width();
1540     w += edge << 1;
1541     h += edge << 1;
1542
1543     if(!(ref = avfilter_get_video_buffer(ctx->outputs[0], perms, w, h)))
1544         return -1;
1545
1546     pixel_size = av_pix_fmt_descriptors[ref->format].comp[0].step_minus1+1;
1547     ref->video->w = codec->width;
1548     ref->video->h = codec->height;
1549     for(i = 0; i < 4; i ++) {
1550         unsigned hshift = (i == 1 || i == 2) ? av_pix_fmt_descriptors[ref->format].log2_chroma_w : 0;
1551         unsigned vshift = (i == 1 || i == 2) ? av_pix_fmt_descriptors[ref->format].log2_chroma_h : 0;
1552
1553         if (ref->data[i]) {
1554             ref->data[i]    += ((edge * pixel_size) >> hshift) + ((edge * ref->linesize[i]) >> vshift);
1555         }
1556         pic->data[i]     = ref->data[i];
1557         pic->linesize[i] = ref->linesize[i];
1558     }
1559     pic->opaque = ref;
1560     pic->age    = INT_MAX;
1561     pic->type   = FF_BUFFER_TYPE_USER;
1562     pic->reordered_opaque = codec->reordered_opaque;
1563     if(codec->pkt) pic->pkt_pts = codec->pkt->pts;
1564     else           pic->pkt_pts = AV_NOPTS_VALUE;
1565     return 0;
1566 }
1567
1568 static void input_release_buffer(AVCodecContext *codec, AVFrame *pic)
1569 {
1570     memset(pic->data, 0, sizeof(pic->data));
1571     avfilter_unref_buffer(pic->opaque);
1572 }
1573
1574 static int input_reget_buffer(AVCodecContext *codec, AVFrame *pic)
1575 {
1576     AVFilterBufferRef *ref = pic->opaque;
1577
1578     if (pic->data[0] == NULL) {
1579         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
1580         return codec->get_buffer(codec, pic);
1581     }
1582
1583     if ((codec->width != ref->video->w) || (codec->height != ref->video->h) ||
1584         (codec->pix_fmt != ref->format)) {
1585         av_log(codec, AV_LOG_ERROR, "Picture properties changed.\n");
1586         return -1;
1587     }
1588
1589     pic->reordered_opaque = codec->reordered_opaque;
1590     if(codec->pkt) pic->pkt_pts = codec->pkt->pts;
1591     else           pic->pkt_pts = AV_NOPTS_VALUE;
1592     return 0;
1593 }
1594
1595 static int input_init(AVFilterContext *ctx, const char *args, void *opaque)
1596 {
1597     FilterPriv *priv = ctx->priv;
1598     AVCodecContext *codec;
1599     if(!opaque) return -1;
1600
1601     priv->is = opaque;
1602     codec    = priv->is->video_st->codec;
1603     codec->opaque = ctx;
1604     if(codec->codec->capabilities & CODEC_CAP_DR1) {
1605         priv->use_dr1 = 1;
1606         codec->get_buffer     = input_get_buffer;
1607         codec->release_buffer = input_release_buffer;
1608         codec->reget_buffer   = input_reget_buffer;
1609         codec->thread_safe_callbacks = 1;
1610     }
1611
1612     priv->frame = avcodec_alloc_frame();
1613
1614     return 0;
1615 }
1616
1617 static void input_uninit(AVFilterContext *ctx)
1618 {
1619     FilterPriv *priv = ctx->priv;
1620     av_free(priv->frame);
1621 }
1622
1623 static int input_request_frame(AVFilterLink *link)
1624 {
1625     FilterPriv *priv = link->src->priv;
1626     AVFilterBufferRef *picref;
1627     int64_t pts = 0;
1628     AVPacket pkt;
1629     int ret;
1630
1631     while (!(ret = get_video_frame(priv->is, priv->frame, &pts, &pkt)))
1632         av_free_packet(&pkt);
1633     if (ret < 0)
1634         return -1;
1635
1636     if(priv->use_dr1) {
1637         picref = avfilter_ref_buffer(priv->frame->opaque, ~0);
1638     } else {
1639         picref = avfilter_get_video_buffer(link, AV_PERM_WRITE, link->w, link->h);
1640         av_image_copy(picref->data, picref->linesize,
1641                       priv->frame->data, priv->frame->linesize,
1642                       picref->format, link->w, link->h);
1643     }
1644     av_free_packet(&pkt);
1645
1646     picref->pts = pts;
1647     picref->pos = pkt.pos;
1648     picref->video->pixel_aspect = priv->is->video_st->codec->sample_aspect_ratio;
1649     avfilter_start_frame(link, picref);
1650     avfilter_draw_slice(link, 0, link->h, 1);
1651     avfilter_end_frame(link);
1652
1653     return 0;
1654 }
1655
1656 static int input_query_formats(AVFilterContext *ctx)
1657 {
1658     FilterPriv *priv = ctx->priv;
1659     enum PixelFormat pix_fmts[] = {
1660         priv->is->video_st->codec->pix_fmt, PIX_FMT_NONE
1661     };
1662
1663     avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
1664     return 0;
1665 }
1666
1667 static int input_config_props(AVFilterLink *link)
1668 {
1669     FilterPriv *priv  = link->src->priv;
1670     AVCodecContext *c = priv->is->video_st->codec;
1671
1672     link->w = c->width;
1673     link->h = c->height;
1674     link->time_base = priv->is->video_st->time_base;
1675
1676     return 0;
1677 }
1678
1679 static AVFilter input_filter =
1680 {
1681     .name      = "avplay_input",
1682
1683     .priv_size = sizeof(FilterPriv),
1684
1685     .init      = input_init,
1686     .uninit    = input_uninit,
1687
1688     .query_formats = input_query_formats,
1689
1690     .inputs    = (AVFilterPad[]) {{ .name = NULL }},
1691     .outputs   = (AVFilterPad[]) {{ .name = "default",
1692                                     .type = AVMEDIA_TYPE_VIDEO,
1693                                     .request_frame = input_request_frame,
1694                                     .config_props  = input_config_props, },
1695                                   { .name = NULL }},
1696 };
1697
1698 static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const char *vfilters)
1699 {
1700     char sws_flags_str[128];
1701     int ret;
1702     FFSinkContext ffsink_ctx = { .pix_fmt = PIX_FMT_YUV420P };
1703     AVFilterContext *filt_src = NULL, *filt_out = NULL;
1704     snprintf(sws_flags_str, sizeof(sws_flags_str), "flags=%d", sws_flags);
1705     graph->scale_sws_opts = av_strdup(sws_flags_str);
1706
1707     if ((ret = avfilter_graph_create_filter(&filt_src, &input_filter, "src",
1708                                             NULL, is, graph)) < 0)
1709         return ret;
1710     if ((ret = avfilter_graph_create_filter(&filt_out, &ffsink, "out",
1711                                             NULL, &ffsink_ctx, graph)) < 0)
1712         return ret;
1713
1714     if(vfilters) {
1715         AVFilterInOut *outputs = av_malloc(sizeof(AVFilterInOut));
1716         AVFilterInOut *inputs  = av_malloc(sizeof(AVFilterInOut));
1717
1718         outputs->name    = av_strdup("in");
1719         outputs->filter_ctx = filt_src;
1720         outputs->pad_idx = 0;
1721         outputs->next    = NULL;
1722
1723         inputs->name    = av_strdup("out");
1724         inputs->filter_ctx = filt_out;
1725         inputs->pad_idx = 0;
1726         inputs->next    = NULL;
1727
1728         if ((ret = avfilter_graph_parse(graph, vfilters, inputs, outputs, NULL)) < 0)
1729             return ret;
1730         av_freep(&vfilters);
1731     } else {
1732         if ((ret = avfilter_link(filt_src, 0, filt_out, 0)) < 0)
1733             return ret;
1734     }
1735
1736     if ((ret = avfilter_graph_config(graph, NULL)) < 0)
1737         return ret;
1738
1739     is->out_video_filter = filt_out;
1740
1741     return ret;
1742 }
1743
1744 #endif  /* CONFIG_AVFILTER */
1745
1746 static int video_thread(void *arg)
1747 {
1748     VideoState *is = arg;
1749     AVFrame *frame= avcodec_alloc_frame();
1750     int64_t pts_int;
1751     double pts;
1752     int ret;
1753
1754 #if CONFIG_AVFILTER
1755     AVFilterGraph *graph = avfilter_graph_alloc();
1756     AVFilterContext *filt_out = NULL;
1757     int64_t pos;
1758
1759     if ((ret = configure_video_filters(graph, is, vfilters)) < 0)
1760         goto the_end;
1761     filt_out = is->out_video_filter;
1762 #endif
1763
1764     for(;;) {
1765 #if !CONFIG_AVFILTER
1766         AVPacket pkt;
1767 #else
1768         AVFilterBufferRef *picref;
1769         AVRational tb;
1770 #endif
1771         while (is->paused && !is->videoq.abort_request)
1772             SDL_Delay(10);
1773 #if CONFIG_AVFILTER
1774         ret = get_filtered_video_frame(filt_out, frame, &picref, &tb);
1775         if (picref) {
1776             pts_int = picref->pts;
1777             pos     = picref->pos;
1778             frame->opaque = picref;
1779         }
1780
1781         if (av_cmp_q(tb, is->video_st->time_base)) {
1782             av_unused int64_t pts1 = pts_int;
1783             pts_int = av_rescale_q(pts_int, tb, is->video_st->time_base);
1784             av_dlog(NULL, "video_thread(): "
1785                     "tb:%d/%d pts:%"PRId64" -> tb:%d/%d pts:%"PRId64"\n",
1786                     tb.num, tb.den, pts1,
1787                     is->video_st->time_base.num, is->video_st->time_base.den, pts_int);
1788         }
1789 #else
1790         ret = get_video_frame(is, frame, &pts_int, &pkt);
1791 #endif
1792
1793         if (ret < 0) goto the_end;
1794
1795         if (!ret)
1796             continue;
1797
1798         pts = pts_int*av_q2d(is->video_st->time_base);
1799
1800 #if CONFIG_AVFILTER
1801         ret = output_picture2(is, frame, pts, pos);
1802 #else
1803         ret = output_picture2(is, frame, pts,  pkt.pos);
1804         av_free_packet(&pkt);
1805 #endif
1806         if (ret < 0)
1807             goto the_end;
1808
1809         if (step)
1810             if (cur_stream)
1811                 stream_pause(cur_stream);
1812     }
1813  the_end:
1814 #if CONFIG_AVFILTER
1815     avfilter_graph_free(&graph);
1816 #endif
1817     av_free(frame);
1818     return 0;
1819 }
1820
1821 static int subtitle_thread(void *arg)
1822 {
1823     VideoState *is = arg;
1824     SubPicture *sp;
1825     AVPacket pkt1, *pkt = &pkt1;
1826     int got_subtitle;
1827     double pts;
1828     int i, j;
1829     int r, g, b, y, u, v, a;
1830
1831     for(;;) {
1832         while (is->paused && !is->subtitleq.abort_request) {
1833             SDL_Delay(10);
1834         }
1835         if (packet_queue_get(&is->subtitleq, pkt, 1) < 0)
1836             break;
1837
1838         if(pkt->data == flush_pkt.data){
1839             avcodec_flush_buffers(is->subtitle_st->codec);
1840             continue;
1841         }
1842         SDL_LockMutex(is->subpq_mutex);
1843         while (is->subpq_size >= SUBPICTURE_QUEUE_SIZE &&
1844                !is->subtitleq.abort_request) {
1845             SDL_CondWait(is->subpq_cond, is->subpq_mutex);
1846         }
1847         SDL_UnlockMutex(is->subpq_mutex);
1848
1849         if (is->subtitleq.abort_request)
1850             return 0;
1851
1852         sp = &is->subpq[is->subpq_windex];
1853
1854        /* NOTE: ipts is the PTS of the _first_ picture beginning in
1855            this packet, if any */
1856         pts = 0;
1857         if (pkt->pts != AV_NOPTS_VALUE)
1858             pts = av_q2d(is->subtitle_st->time_base)*pkt->pts;
1859
1860         avcodec_decode_subtitle2(is->subtitle_st->codec, &sp->sub,
1861                                  &got_subtitle, pkt);
1862
1863         if (got_subtitle && sp->sub.format == 0) {
1864             sp->pts = pts;
1865
1866             for (i = 0; i < sp->sub.num_rects; i++)
1867             {
1868                 for (j = 0; j < sp->sub.rects[i]->nb_colors; j++)
1869                 {
1870                     RGBA_IN(r, g, b, a, (uint32_t*)sp->sub.rects[i]->pict.data[1] + j);
1871                     y = RGB_TO_Y_CCIR(r, g, b);
1872                     u = RGB_TO_U_CCIR(r, g, b, 0);
1873                     v = RGB_TO_V_CCIR(r, g, b, 0);
1874                     YUVA_OUT((uint32_t*)sp->sub.rects[i]->pict.data[1] + j, y, u, v, a);
1875                 }
1876             }
1877
1878             /* now we can update the picture count */
1879             if (++is->subpq_windex == SUBPICTURE_QUEUE_SIZE)
1880                 is->subpq_windex = 0;
1881             SDL_LockMutex(is->subpq_mutex);
1882             is->subpq_size++;
1883             SDL_UnlockMutex(is->subpq_mutex);
1884         }
1885         av_free_packet(pkt);
1886     }
1887     return 0;
1888 }
1889
1890 /* copy samples for viewing in editor window */
1891 static void update_sample_display(VideoState *is, short *samples, int samples_size)
1892 {
1893     int size, len;
1894
1895     size = samples_size / sizeof(short);
1896     while (size > 0) {
1897         len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
1898         if (len > size)
1899             len = size;
1900         memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
1901         samples += len;
1902         is->sample_array_index += len;
1903         if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
1904             is->sample_array_index = 0;
1905         size -= len;
1906     }
1907 }
1908
1909 /* return the new audio buffer size (samples can be added or deleted
1910    to get better sync if video or external master clock) */
1911 static int synchronize_audio(VideoState *is, short *samples,
1912                              int samples_size1, double pts)
1913 {
1914     int n, samples_size;
1915     double ref_clock;
1916
1917     n = 2 * is->audio_st->codec->channels;
1918     samples_size = samples_size1;
1919
1920     /* if not master, then we try to remove or add samples to correct the clock */
1921     if (((is->av_sync_type == AV_SYNC_VIDEO_MASTER && is->video_st) ||
1922          is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)) {
1923         double diff, avg_diff;
1924         int wanted_size, min_size, max_size, nb_samples;
1925
1926         ref_clock = get_master_clock(is);
1927         diff = get_audio_clock(is) - ref_clock;
1928
1929         if (diff < AV_NOSYNC_THRESHOLD) {
1930             is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
1931             if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
1932                 /* not enough measures to have a correct estimate */
1933                 is->audio_diff_avg_count++;
1934             } else {
1935                 /* estimate the A-V difference */
1936                 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
1937
1938                 if (fabs(avg_diff) >= is->audio_diff_threshold) {
1939                     wanted_size = samples_size + ((int)(diff * is->audio_st->codec->sample_rate) * n);
1940                     nb_samples = samples_size / n;
1941
1942                     min_size = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
1943                     max_size = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
1944                     if (wanted_size < min_size)
1945                         wanted_size = min_size;
1946                     else if (wanted_size > max_size)
1947                         wanted_size = max_size;
1948
1949                     /* add or remove samples to correction the synchro */
1950                     if (wanted_size < samples_size) {
1951                         /* remove samples */
1952                         samples_size = wanted_size;
1953                     } else if (wanted_size > samples_size) {
1954                         uint8_t *samples_end, *q;
1955                         int nb;
1956
1957                         /* add samples */
1958                         nb = (samples_size - wanted_size);
1959                         samples_end = (uint8_t *)samples + samples_size - n;
1960                         q = samples_end + n;
1961                         while (nb > 0) {
1962                             memcpy(q, samples_end, n);
1963                             q += n;
1964                             nb -= n;
1965                         }
1966                         samples_size = wanted_size;
1967                     }
1968                 }
1969                 av_dlog(NULL, "diff=%f adiff=%f sample_diff=%d apts=%0.3f vpts=%0.3f %f\n",
1970                         diff, avg_diff, samples_size - samples_size1,
1971                         is->audio_clock, is->video_clock, is->audio_diff_threshold);
1972             }
1973         } else {
1974             /* too big difference : may be initial PTS errors, so
1975                reset A-V filter */
1976             is->audio_diff_avg_count = 0;
1977             is->audio_diff_cum = 0;
1978         }
1979     }
1980
1981     return samples_size;
1982 }
1983
1984 /* decode one audio frame and returns its uncompressed size */
1985 static int audio_decode_frame(VideoState *is, double *pts_ptr)
1986 {
1987     AVPacket *pkt_temp = &is->audio_pkt_temp;
1988     AVPacket *pkt = &is->audio_pkt;
1989     AVCodecContext *dec= is->audio_st->codec;
1990     int n, len1, data_size;
1991     double pts;
1992
1993     for(;;) {
1994         /* NOTE: the audio packet can contain several frames */
1995         while (pkt_temp->size > 0) {
1996             data_size = sizeof(is->audio_buf1);
1997             len1 = avcodec_decode_audio3(dec,
1998                                         (int16_t *)is->audio_buf1, &data_size,
1999                                         pkt_temp);
2000             if (len1 < 0) {
2001                 /* if error, we skip the frame */
2002                 pkt_temp->size = 0;
2003                 break;
2004             }
2005
2006             pkt_temp->data += len1;
2007             pkt_temp->size -= len1;
2008             if (data_size <= 0)
2009                 continue;
2010
2011             if (dec->sample_fmt != is->audio_src_fmt) {
2012                 if (is->reformat_ctx)
2013                     av_audio_convert_free(is->reformat_ctx);
2014                 is->reformat_ctx= av_audio_convert_alloc(AV_SAMPLE_FMT_S16, 1,
2015                                                          dec->sample_fmt, 1, NULL, 0);
2016                 if (!is->reformat_ctx) {
2017                     fprintf(stderr, "Cannot convert %s sample format to %s sample format\n",
2018                         av_get_sample_fmt_name(dec->sample_fmt),
2019                         av_get_sample_fmt_name(AV_SAMPLE_FMT_S16));
2020                         break;
2021                 }
2022                 is->audio_src_fmt= dec->sample_fmt;
2023             }
2024
2025             if (is->reformat_ctx) {
2026                 const void *ibuf[6]= {is->audio_buf1};
2027                 void *obuf[6]= {is->audio_buf2};
2028                 int istride[6]= {av_get_bytes_per_sample(dec->sample_fmt)};
2029                 int ostride[6]= {2};
2030                 int len= data_size/istride[0];
2031                 if (av_audio_convert(is->reformat_ctx, obuf, ostride, ibuf, istride, len)<0) {
2032                     printf("av_audio_convert() failed\n");
2033                     break;
2034                 }
2035                 is->audio_buf= is->audio_buf2;
2036                 /* FIXME: existing code assume that data_size equals framesize*channels*2
2037                           remove this legacy cruft */
2038                 data_size= len*2;
2039             }else{
2040                 is->audio_buf= is->audio_buf1;
2041             }
2042
2043             /* if no pts, then compute it */
2044             pts = is->audio_clock;
2045             *pts_ptr = pts;
2046             n = 2 * dec->channels;
2047             is->audio_clock += (double)data_size /
2048                 (double)(n * dec->sample_rate);
2049 #ifdef DEBUG
2050             {
2051                 static double last_clock;
2052                 printf("audio: delay=%0.3f clock=%0.3f pts=%0.3f\n",
2053                        is->audio_clock - last_clock,
2054                        is->audio_clock, pts);
2055                 last_clock = is->audio_clock;
2056             }
2057 #endif
2058             return data_size;
2059         }
2060
2061         /* free the current packet */
2062         if (pkt->data)
2063             av_free_packet(pkt);
2064
2065         if (is->paused || is->audioq.abort_request) {
2066             return -1;
2067         }
2068
2069         /* read next packet */
2070         if (packet_queue_get(&is->audioq, pkt, 1) < 0)
2071             return -1;
2072         if(pkt->data == flush_pkt.data){
2073             avcodec_flush_buffers(dec);
2074             continue;
2075         }
2076
2077         pkt_temp->data = pkt->data;
2078         pkt_temp->size = pkt->size;
2079
2080         /* if update the audio clock with the pts */
2081         if (pkt->pts != AV_NOPTS_VALUE) {
2082             is->audio_clock = av_q2d(is->audio_st->time_base)*pkt->pts;
2083         }
2084     }
2085 }
2086
2087 /* prepare a new audio buffer */
2088 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
2089 {
2090     VideoState *is = opaque;
2091     int audio_size, len1;
2092     double pts;
2093
2094     audio_callback_time = av_gettime();
2095
2096     while (len > 0) {
2097         if (is->audio_buf_index >= is->audio_buf_size) {
2098            audio_size = audio_decode_frame(is, &pts);
2099            if (audio_size < 0) {
2100                 /* if error, just output silence */
2101                is->audio_buf = is->audio_buf1;
2102                is->audio_buf_size = 1024;
2103                memset(is->audio_buf, 0, is->audio_buf_size);
2104            } else {
2105                if (is->show_audio)
2106                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2107                audio_size = synchronize_audio(is, (int16_t *)is->audio_buf, audio_size,
2108                                               pts);
2109                is->audio_buf_size = audio_size;
2110            }
2111            is->audio_buf_index = 0;
2112         }
2113         len1 = is->audio_buf_size - is->audio_buf_index;
2114         if (len1 > len)
2115             len1 = len;
2116         memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2117         len -= len1;
2118         stream += len1;
2119         is->audio_buf_index += len1;
2120     }
2121 }
2122
2123 /* open a given stream. Return 0 if OK */
2124 static int stream_component_open(VideoState *is, int stream_index)
2125 {
2126     AVFormatContext *ic = is->ic;
2127     AVCodecContext *avctx;
2128     AVCodec *codec;
2129     SDL_AudioSpec wanted_spec, spec;
2130     AVDictionary *opts;
2131     AVDictionaryEntry *t = NULL;
2132
2133     if (stream_index < 0 || stream_index >= ic->nb_streams)
2134         return -1;
2135     avctx = ic->streams[stream_index]->codec;
2136
2137     opts = filter_codec_opts(codec_opts, avctx->codec_id, 0);
2138
2139     /* prepare audio output */
2140     if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
2141         if (avctx->channels > 0) {
2142             avctx->request_channels = FFMIN(2, avctx->channels);
2143         } else {
2144             avctx->request_channels = 2;
2145         }
2146     }
2147
2148     codec = avcodec_find_decoder(avctx->codec_id);
2149     avctx->debug_mv = debug_mv;
2150     avctx->debug = debug;
2151     avctx->workaround_bugs = workaround_bugs;
2152     avctx->lowres = lowres;
2153     if(lowres) avctx->flags |= CODEC_FLAG_EMU_EDGE;
2154     avctx->idct_algo= idct;
2155     if(fast) avctx->flags2 |= CODEC_FLAG2_FAST;
2156     avctx->skip_frame= skip_frame;
2157     avctx->skip_idct= skip_idct;
2158     avctx->skip_loop_filter= skip_loop_filter;
2159     avctx->error_recognition= error_recognition;
2160     avctx->error_concealment= error_concealment;
2161     avctx->thread_count= thread_count;
2162
2163     if (!codec ||
2164         avcodec_open2(avctx, codec, &opts) < 0)
2165         return -1;
2166     if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2167         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2168         return AVERROR_OPTION_NOT_FOUND;
2169     }
2170
2171     /* prepare audio output */
2172     if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
2173         wanted_spec.freq = avctx->sample_rate;
2174         wanted_spec.format = AUDIO_S16SYS;
2175         wanted_spec.channels = avctx->channels;
2176         wanted_spec.silence = 0;
2177         wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
2178         wanted_spec.callback = sdl_audio_callback;
2179         wanted_spec.userdata = is;
2180         if (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
2181             fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError());
2182             return -1;
2183         }
2184         is->audio_hw_buf_size = spec.size;
2185         is->audio_src_fmt= AV_SAMPLE_FMT_S16;
2186     }
2187
2188     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
2189     switch(avctx->codec_type) {
2190     case AVMEDIA_TYPE_AUDIO:
2191         is->audio_stream = stream_index;
2192         is->audio_st = ic->streams[stream_index];
2193         is->audio_buf_size = 0;
2194         is->audio_buf_index = 0;
2195
2196         /* init averaging filter */
2197         is->audio_diff_avg_coef = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2198         is->audio_diff_avg_count = 0;
2199         /* since we do not have a precise anough audio fifo fullness,
2200            we correct audio sync only if larger than this threshold */
2201         is->audio_diff_threshold = 2.0 * SDL_AUDIO_BUFFER_SIZE / avctx->sample_rate;
2202
2203         memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
2204         packet_queue_init(&is->audioq);
2205         SDL_PauseAudio(0);
2206         break;
2207     case AVMEDIA_TYPE_VIDEO:
2208         is->video_stream = stream_index;
2209         is->video_st = ic->streams[stream_index];
2210
2211         packet_queue_init(&is->videoq);
2212         is->video_tid = SDL_CreateThread(video_thread, is);
2213         break;
2214     case AVMEDIA_TYPE_SUBTITLE:
2215         is->subtitle_stream = stream_index;
2216         is->subtitle_st = ic->streams[stream_index];
2217         packet_queue_init(&is->subtitleq);
2218
2219         is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
2220         break;
2221     default:
2222         break;
2223     }
2224     return 0;
2225 }
2226
2227 static void stream_component_close(VideoState *is, int stream_index)
2228 {
2229     AVFormatContext *ic = is->ic;
2230     AVCodecContext *avctx;
2231
2232     if (stream_index < 0 || stream_index >= ic->nb_streams)
2233         return;
2234     avctx = ic->streams[stream_index]->codec;
2235
2236     switch(avctx->codec_type) {
2237     case AVMEDIA_TYPE_AUDIO:
2238         packet_queue_abort(&is->audioq);
2239
2240         SDL_CloseAudio();
2241
2242         packet_queue_end(&is->audioq);
2243         if (is->reformat_ctx)
2244             av_audio_convert_free(is->reformat_ctx);
2245         is->reformat_ctx = NULL;
2246         break;
2247     case AVMEDIA_TYPE_VIDEO:
2248         packet_queue_abort(&is->videoq);
2249
2250         /* note: we also signal this mutex to make sure we deblock the
2251            video thread in all cases */
2252         SDL_LockMutex(is->pictq_mutex);
2253         SDL_CondSignal(is->pictq_cond);
2254         SDL_UnlockMutex(is->pictq_mutex);
2255
2256         SDL_WaitThread(is->video_tid, NULL);
2257
2258         packet_queue_end(&is->videoq);
2259         break;
2260     case AVMEDIA_TYPE_SUBTITLE:
2261         packet_queue_abort(&is->subtitleq);
2262
2263         /* note: we also signal this mutex to make sure we deblock the
2264            video thread in all cases */
2265         SDL_LockMutex(is->subpq_mutex);
2266         is->subtitle_stream_changed = 1;
2267
2268         SDL_CondSignal(is->subpq_cond);
2269         SDL_UnlockMutex(is->subpq_mutex);
2270
2271         SDL_WaitThread(is->subtitle_tid, NULL);
2272
2273         packet_queue_end(&is->subtitleq);
2274         break;
2275     default:
2276         break;
2277     }
2278
2279     ic->streams[stream_index]->discard = AVDISCARD_ALL;
2280     avcodec_close(avctx);
2281     switch(avctx->codec_type) {
2282     case AVMEDIA_TYPE_AUDIO:
2283         is->audio_st = NULL;
2284         is->audio_stream = -1;
2285         break;
2286     case AVMEDIA_TYPE_VIDEO:
2287         is->video_st = NULL;
2288         is->video_stream = -1;
2289         break;
2290     case AVMEDIA_TYPE_SUBTITLE:
2291         is->subtitle_st = NULL;
2292         is->subtitle_stream = -1;
2293         break;
2294     default:
2295         break;
2296     }
2297 }
2298
2299 /* since we have only one decoding thread, we can use a global
2300    variable instead of a thread local variable */
2301 static VideoState *global_video_state;
2302
2303 static int decode_interrupt_cb(void)
2304 {
2305     return (global_video_state && global_video_state->abort_request);
2306 }
2307
2308 /* this thread gets the stream from the disk or the network */
2309 static int decode_thread(void *arg)
2310 {
2311     VideoState *is = arg;
2312     AVFormatContext *ic = NULL;
2313     int err, i, ret;
2314     int st_index[AVMEDIA_TYPE_NB];
2315     AVPacket pkt1, *pkt = &pkt1;
2316     int eof=0;
2317     int pkt_in_play_range = 0;
2318     AVDictionaryEntry *t;
2319     AVDictionary **opts;
2320     int orig_nb_streams;
2321
2322     memset(st_index, -1, sizeof(st_index));
2323     is->video_stream = -1;
2324     is->audio_stream = -1;
2325     is->subtitle_stream = -1;
2326
2327     global_video_state = is;
2328     avio_set_interrupt_cb(decode_interrupt_cb);
2329
2330     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2331     if (err < 0) {
2332         print_error(is->filename, err);
2333         ret = -1;
2334         goto fail;
2335     }
2336     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2337         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2338         ret = AVERROR_OPTION_NOT_FOUND;
2339         goto fail;
2340     }
2341     is->ic = ic;
2342
2343     if(genpts)
2344         ic->flags |= AVFMT_FLAG_GENPTS;
2345
2346     opts = setup_find_stream_info_opts(ic, codec_opts);
2347     orig_nb_streams = ic->nb_streams;
2348
2349     err = avformat_find_stream_info(ic, opts);
2350     if (err < 0) {
2351         fprintf(stderr, "%s: could not find codec parameters\n", is->filename);
2352         ret = -1;
2353         goto fail;
2354     }
2355     for (i = 0; i < orig_nb_streams; i++)
2356         av_dict_free(&opts[i]);
2357     av_freep(&opts);
2358
2359     if(ic->pb)
2360         ic->pb->eof_reached= 0; //FIXME hack, avplay maybe should not use url_feof() to test for the end
2361
2362     if(seek_by_bytes<0)
2363         seek_by_bytes= !!(ic->iformat->flags & AVFMT_TS_DISCONT);
2364
2365     /* if seeking requested, we execute it */
2366     if (start_time != AV_NOPTS_VALUE) {
2367         int64_t timestamp;
2368
2369         timestamp = start_time;
2370         /* add the stream start time */
2371         if (ic->start_time != AV_NOPTS_VALUE)
2372             timestamp += ic->start_time;
2373         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
2374         if (ret < 0) {
2375             fprintf(stderr, "%s: could not seek to position %0.3f\n",
2376                     is->filename, (double)timestamp / AV_TIME_BASE);
2377         }
2378     }
2379
2380     for (i = 0; i < ic->nb_streams; i++)
2381         ic->streams[i]->discard = AVDISCARD_ALL;
2382     if (!video_disable)
2383         st_index[AVMEDIA_TYPE_VIDEO] =
2384             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
2385                                 wanted_stream[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
2386     if (!audio_disable)
2387         st_index[AVMEDIA_TYPE_AUDIO] =
2388             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
2389                                 wanted_stream[AVMEDIA_TYPE_AUDIO],
2390                                 st_index[AVMEDIA_TYPE_VIDEO],
2391                                 NULL, 0);
2392     if (!video_disable)
2393         st_index[AVMEDIA_TYPE_SUBTITLE] =
2394             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
2395                                 wanted_stream[AVMEDIA_TYPE_SUBTITLE],
2396                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
2397                                  st_index[AVMEDIA_TYPE_AUDIO] :
2398                                  st_index[AVMEDIA_TYPE_VIDEO]),
2399                                 NULL, 0);
2400     if (show_status) {
2401         av_dump_format(ic, 0, is->filename, 0);
2402     }
2403
2404     /* open the streams */
2405     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
2406         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2407     }
2408
2409     ret=-1;
2410     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2411         ret= stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2412     }
2413     is->refresh_tid = SDL_CreateThread(refresh_thread, is);
2414     if(ret<0) {
2415         if (!display_disable)
2416             is->show_audio = 2;
2417     }
2418
2419     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
2420         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2421     }
2422
2423     if (is->video_stream < 0 && is->audio_stream < 0) {
2424         fprintf(stderr, "%s: could not open codecs\n", is->filename);
2425         ret = -1;
2426         goto fail;
2427     }
2428
2429     for(;;) {
2430         if (is->abort_request)
2431             break;
2432         if (is->paused != is->last_paused) {
2433             is->last_paused = is->paused;
2434             if (is->paused)
2435                 is->read_pause_return= av_read_pause(ic);
2436             else
2437                 av_read_play(ic);
2438         }
2439 #if CONFIG_RTSP_DEMUXER
2440         if (is->paused && !strcmp(ic->iformat->name, "rtsp")) {
2441             /* wait 10 ms to avoid trying to get another packet */
2442             /* XXX: horrible */
2443             SDL_Delay(10);
2444             continue;
2445         }
2446 #endif
2447         if (is->seek_req) {
2448             int64_t seek_target= is->seek_pos;
2449             int64_t seek_min= is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2450             int64_t seek_max= is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2451 //FIXME the +-2 is due to rounding being not done in the correct direction in generation
2452 //      of the seek_pos/seek_rel variables
2453
2454             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2455             if (ret < 0) {
2456                 fprintf(stderr, "%s: error while seeking\n", is->ic->filename);
2457             }else{
2458                 if (is->audio_stream >= 0) {
2459                     packet_queue_flush(&is->audioq);
2460                     packet_queue_put(&is->audioq, &flush_pkt);
2461                 }
2462                 if (is->subtitle_stream >= 0) {
2463                     packet_queue_flush(&is->subtitleq);
2464                     packet_queue_put(&is->subtitleq, &flush_pkt);
2465                 }
2466                 if (is->video_stream >= 0) {
2467                     packet_queue_flush(&is->videoq);
2468                     packet_queue_put(&is->videoq, &flush_pkt);
2469                 }
2470             }
2471             is->seek_req = 0;
2472             eof= 0;
2473         }
2474
2475         /* if the queue are full, no need to read more */
2476         if (   is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2477             || (   (is->audioq   .size  > MIN_AUDIOQ_SIZE || is->audio_stream<0)
2478                 && (is->videoq   .nb_packets > MIN_FRAMES || is->video_stream<0)
2479                 && (is->subtitleq.nb_packets > MIN_FRAMES || is->subtitle_stream<0))) {
2480             /* wait 10 ms */
2481             SDL_Delay(10);
2482             continue;
2483         }
2484         if(eof) {
2485             if(is->video_stream >= 0){
2486                 av_init_packet(pkt);
2487                 pkt->data=NULL;
2488                 pkt->size=0;
2489                 pkt->stream_index= is->video_stream;
2490                 packet_queue_put(&is->videoq, pkt);
2491             }
2492             SDL_Delay(10);
2493             if(is->audioq.size + is->videoq.size + is->subtitleq.size ==0){
2494                 if(loop!=1 && (!loop || --loop)){
2495                     stream_seek(cur_stream, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
2496                 }else if(autoexit){
2497                     ret=AVERROR_EOF;
2498                     goto fail;
2499                 }
2500             }
2501             continue;
2502         }
2503         ret = av_read_frame(ic, pkt);
2504         if (ret < 0) {
2505             if (ret == AVERROR_EOF || (ic->pb && ic->pb->eof_reached))
2506                 eof=1;
2507             if (ic->pb && ic->pb->error)
2508                 break;
2509             SDL_Delay(100); /* wait for user event */
2510             continue;
2511         }
2512         /* check if packet is in play range specified by user, then queue, otherwise discard */
2513         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
2514                 (pkt->pts - ic->streams[pkt->stream_index]->start_time) *
2515                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
2516                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0)/1000000
2517                 <= ((double)duration/1000000);
2518         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
2519             packet_queue_put(&is->audioq, pkt);
2520         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range) {
2521             packet_queue_put(&is->videoq, pkt);
2522         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
2523             packet_queue_put(&is->subtitleq, pkt);
2524         } else {
2525             av_free_packet(pkt);
2526         }
2527     }
2528     /* wait until the end */
2529     while (!is->abort_request) {
2530         SDL_Delay(100);
2531     }
2532
2533     ret = 0;
2534  fail:
2535     /* disable interrupting */
2536     global_video_state = NULL;
2537
2538     /* close each stream */
2539     if (is->audio_stream >= 0)
2540         stream_component_close(is, is->audio_stream);
2541     if (is->video_stream >= 0)
2542         stream_component_close(is, is->video_stream);
2543     if (is->subtitle_stream >= 0)
2544         stream_component_close(is, is->subtitle_stream);
2545     if (is->ic) {
2546         av_close_input_file(is->ic);
2547         is->ic = NULL; /* safety */
2548     }
2549     avio_set_interrupt_cb(NULL);
2550
2551     if (ret != 0) {
2552         SDL_Event event;
2553
2554         event.type = FF_QUIT_EVENT;
2555         event.user.data1 = is;
2556         SDL_PushEvent(&event);
2557     }
2558     return 0;
2559 }
2560
2561 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
2562 {
2563     VideoState *is;
2564
2565     is = av_mallocz(sizeof(VideoState));
2566     if (!is)
2567         return NULL;
2568     av_strlcpy(is->filename, filename, sizeof(is->filename));
2569     is->iformat = iformat;
2570     is->ytop = 0;
2571     is->xleft = 0;
2572
2573     /* start video display */
2574     is->pictq_mutex = SDL_CreateMutex();
2575     is->pictq_cond = SDL_CreateCond();
2576
2577     is->subpq_mutex = SDL_CreateMutex();
2578     is->subpq_cond = SDL_CreateCond();
2579
2580     is->av_sync_type = av_sync_type;
2581     is->parse_tid = SDL_CreateThread(decode_thread, is);
2582     if (!is->parse_tid) {
2583         av_free(is);
2584         return NULL;
2585     }
2586     return is;
2587 }
2588
2589 static void stream_cycle_channel(VideoState *is, int codec_type)
2590 {
2591     AVFormatContext *ic = is->ic;
2592     int start_index, stream_index;
2593     AVStream *st;
2594
2595     if (codec_type == AVMEDIA_TYPE_VIDEO)
2596         start_index = is->video_stream;
2597     else if (codec_type == AVMEDIA_TYPE_AUDIO)
2598         start_index = is->audio_stream;
2599     else
2600         start_index = is->subtitle_stream;
2601     if (start_index < (codec_type == AVMEDIA_TYPE_SUBTITLE ? -1 : 0))
2602         return;
2603     stream_index = start_index;
2604     for(;;) {
2605         if (++stream_index >= is->ic->nb_streams)
2606         {
2607             if (codec_type == AVMEDIA_TYPE_SUBTITLE)
2608             {
2609                 stream_index = -1;
2610                 goto the_end;
2611             } else
2612                 stream_index = 0;
2613         }
2614         if (stream_index == start_index)
2615             return;
2616         st = ic->streams[stream_index];
2617         if (st->codec->codec_type == codec_type) {
2618             /* check that parameters are OK */
2619             switch(codec_type) {
2620             case AVMEDIA_TYPE_AUDIO:
2621                 if (st->codec->sample_rate != 0 &&
2622                     st->codec->channels != 0)
2623                     goto the_end;
2624                 break;
2625             case AVMEDIA_TYPE_VIDEO:
2626             case AVMEDIA_TYPE_SUBTITLE:
2627                 goto the_end;
2628             default:
2629                 break;
2630             }
2631         }
2632     }
2633  the_end:
2634     stream_component_close(is, start_index);
2635     stream_component_open(is, stream_index);
2636 }
2637
2638
2639 static void toggle_full_screen(void)
2640 {
2641     is_full_screen = !is_full_screen;
2642     video_open(cur_stream);
2643 }
2644
2645 static void toggle_pause(void)
2646 {
2647     if (cur_stream)
2648         stream_pause(cur_stream);
2649     step = 0;
2650 }
2651
2652 static void step_to_next_frame(void)
2653 {
2654     if (cur_stream) {
2655         /* if the stream is paused unpause it, then step */
2656         if (cur_stream->paused)
2657             stream_pause(cur_stream);
2658     }
2659     step = 1;
2660 }
2661
2662 static void toggle_audio_display(void)
2663 {
2664     if (cur_stream) {
2665         int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
2666         cur_stream->show_audio = (cur_stream->show_audio + 1) % 3;
2667         fill_rectangle(screen,
2668                     cur_stream->xleft, cur_stream->ytop, cur_stream->width, cur_stream->height,
2669                     bgcolor);
2670         SDL_UpdateRect(screen, cur_stream->xleft, cur_stream->ytop, cur_stream->width, cur_stream->height);
2671     }
2672 }
2673
2674 /* handle an event sent by the GUI */
2675 static void event_loop(void)
2676 {
2677     SDL_Event event;
2678     double incr, pos, frac;
2679
2680     for(;;) {
2681         double x;
2682         SDL_WaitEvent(&event);
2683         switch(event.type) {
2684         case SDL_KEYDOWN:
2685             if (exit_on_keydown) {
2686                 do_exit();
2687                 break;
2688             }
2689             switch(event.key.keysym.sym) {
2690             case SDLK_ESCAPE:
2691             case SDLK_q:
2692                 do_exit();
2693                 break;
2694             case SDLK_f:
2695                 toggle_full_screen();
2696                 break;
2697             case SDLK_p:
2698             case SDLK_SPACE:
2699                 toggle_pause();
2700                 break;
2701             case SDLK_s: //S: Step to next frame
2702                 step_to_next_frame();
2703                 break;
2704             case SDLK_a:
2705                 if (cur_stream)
2706                     stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
2707                 break;
2708             case SDLK_v:
2709                 if (cur_stream)
2710                     stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
2711                 break;
2712             case SDLK_t:
2713                 if (cur_stream)
2714                     stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
2715                 break;
2716             case SDLK_w:
2717                 toggle_audio_display();
2718                 break;
2719             case SDLK_LEFT:
2720                 incr = -10.0;
2721                 goto do_seek;
2722             case SDLK_RIGHT:
2723                 incr = 10.0;
2724                 goto do_seek;
2725             case SDLK_UP:
2726                 incr = 60.0;
2727                 goto do_seek;
2728             case SDLK_DOWN:
2729                 incr = -60.0;
2730             do_seek:
2731                 if (cur_stream) {
2732                     if (seek_by_bytes) {
2733                         if (cur_stream->video_stream >= 0 && cur_stream->video_current_pos>=0){
2734                             pos= cur_stream->video_current_pos;
2735                         }else if(cur_stream->audio_stream >= 0 && cur_stream->audio_pkt.pos>=0){
2736                             pos= cur_stream->audio_pkt.pos;
2737                         }else
2738                             pos = avio_tell(cur_stream->ic->pb);
2739                         if (cur_stream->ic->bit_rate)
2740                             incr *= cur_stream->ic->bit_rate / 8.0;
2741                         else
2742                             incr *= 180000.0;
2743                         pos += incr;
2744                         stream_seek(cur_stream, pos, incr, 1);
2745                     } else {
2746                         pos = get_master_clock(cur_stream);
2747                         pos += incr;
2748                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
2749                     }
2750                 }
2751                 break;
2752             default:
2753                 break;
2754             }
2755             break;
2756         case SDL_MOUSEBUTTONDOWN:
2757             if (exit_on_mousedown) {
2758                 do_exit();
2759                 break;
2760             }
2761         case SDL_MOUSEMOTION:
2762             if(event.type ==SDL_MOUSEBUTTONDOWN){
2763                 x= event.button.x;
2764             }else{
2765                 if(event.motion.state != SDL_PRESSED)
2766                     break;
2767                 x= event.motion.x;
2768             }
2769             if (cur_stream) {
2770                 if(seek_by_bytes || cur_stream->ic->duration<=0){
2771                     uint64_t size=  avio_size(cur_stream->ic->pb);
2772                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
2773                 }else{
2774                     int64_t ts;
2775                     int ns, hh, mm, ss;
2776                     int tns, thh, tmm, tss;
2777                     tns = cur_stream->ic->duration/1000000LL;
2778                     thh = tns/3600;
2779                     tmm = (tns%3600)/60;
2780                     tss = (tns%60);
2781                     frac = x/cur_stream->width;
2782                     ns = frac*tns;
2783                     hh = ns/3600;
2784                     mm = (ns%3600)/60;
2785                     ss = (ns%60);
2786                     fprintf(stderr, "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
2787                             hh, mm, ss, thh, tmm, tss);
2788                     ts = frac*cur_stream->ic->duration;
2789                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
2790                         ts += cur_stream->ic->start_time;
2791                     stream_seek(cur_stream, ts, 0, 0);
2792                 }
2793             }
2794             break;
2795         case SDL_VIDEORESIZE:
2796             if (cur_stream) {
2797                 screen = SDL_SetVideoMode(event.resize.w, event.resize.h, 0,
2798                                           SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
2799                 screen_width = cur_stream->width = event.resize.w;
2800                 screen_height= cur_stream->height= event.resize.h;
2801             }
2802             break;
2803         case SDL_QUIT:
2804         case FF_QUIT_EVENT:
2805             do_exit();
2806             break;
2807         case FF_ALLOC_EVENT:
2808             video_open(event.user.data1);
2809             alloc_picture(event.user.data1);
2810             break;
2811         case FF_REFRESH_EVENT:
2812             video_refresh_timer(event.user.data1);
2813             cur_stream->refresh=0;
2814             break;
2815         default:
2816             break;
2817         }
2818     }
2819 }
2820
2821 static int opt_frame_size(const char *opt, const char *arg)
2822 {
2823     av_log(NULL, AV_LOG_ERROR,
2824            "Option '%s' has been removed, use private format options instead\n", opt);
2825     return AVERROR(EINVAL);
2826 }
2827
2828 static int opt_width(const char *opt, const char *arg)
2829 {
2830     screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
2831     return 0;
2832 }
2833
2834 static int opt_height(const char *opt, const char *arg)
2835 {
2836     screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
2837     return 0;
2838 }
2839
2840 static int opt_format(const char *opt, const char *arg)
2841 {
2842     file_iformat = av_find_input_format(arg);
2843     if (!file_iformat) {
2844         fprintf(stderr, "Unknown input format: %s\n", arg);
2845         return AVERROR(EINVAL);
2846     }
2847     return 0;
2848 }
2849
2850 static int opt_frame_pix_fmt(const char *opt, const char *arg)
2851 {
2852     av_log(NULL, AV_LOG_ERROR,
2853            "Option '%s' has been removed, use private format options instead\n", opt);
2854     return AVERROR(EINVAL);
2855 }
2856
2857 static int opt_sync(const char *opt, const char *arg)
2858 {
2859     if (!strcmp(arg, "audio"))
2860         av_sync_type = AV_SYNC_AUDIO_MASTER;
2861     else if (!strcmp(arg, "video"))
2862         av_sync_type = AV_SYNC_VIDEO_MASTER;
2863     else if (!strcmp(arg, "ext"))
2864         av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
2865     else {
2866         fprintf(stderr, "Unknown value for %s: %s\n", opt, arg);
2867         exit(1);
2868     }
2869     return 0;
2870 }
2871
2872 static int opt_seek(const char *opt, const char *arg)
2873 {
2874     start_time = parse_time_or_die(opt, arg, 1);
2875     return 0;
2876 }
2877
2878 static int opt_duration(const char *opt, const char *arg)
2879 {
2880     duration = parse_time_or_die(opt, arg, 1);
2881     return 0;
2882 }
2883
2884 static int opt_debug(const char *opt, const char *arg)
2885 {
2886     av_log_set_level(99);
2887     debug = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
2888     return 0;
2889 }
2890
2891 static int opt_vismv(const char *opt, const char *arg)
2892 {
2893     debug_mv = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
2894     return 0;
2895 }
2896
2897 static int opt_thread_count(const char *opt, const char *arg)
2898 {
2899     thread_count= parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
2900 #if !HAVE_THREADS
2901     fprintf(stderr, "Warning: not compiled with thread support, using thread emulation\n");
2902 #endif
2903     return 0;
2904 }
2905
2906 static const OptionDef options[] = {
2907 #include "cmdutils_common_opts.h"
2908     { "x", HAS_ARG, {(void*)opt_width}, "force displayed width", "width" },
2909     { "y", HAS_ARG, {(void*)opt_height}, "force displayed height", "height" },
2910     { "s", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_size}, "set frame size (WxH or abbreviation)", "size" },
2911     { "fs", OPT_BOOL, {(void*)&is_full_screen}, "force full screen" },
2912     { "an", OPT_BOOL, {(void*)&audio_disable}, "disable audio" },
2913     { "vn", OPT_BOOL, {(void*)&video_disable}, "disable video" },
2914     { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&wanted_stream[AVMEDIA_TYPE_AUDIO]}, "select desired audio stream", "stream_number" },
2915     { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&wanted_stream[AVMEDIA_TYPE_VIDEO]}, "select desired video stream", "stream_number" },
2916     { "sst", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&wanted_stream[AVMEDIA_TYPE_SUBTITLE]}, "select desired subtitle stream", "stream_number" },
2917     { "ss", HAS_ARG, {(void*)&opt_seek}, "seek to a given position in seconds", "pos" },
2918     { "t", HAS_ARG, {(void*)&opt_duration}, "play  \"duration\" seconds of audio/video", "duration" },
2919     { "bytes", OPT_INT | HAS_ARG, {(void*)&seek_by_bytes}, "seek by bytes 0=off 1=on -1=auto", "val" },
2920     { "nodisp", OPT_BOOL, {(void*)&display_disable}, "disable graphical display" },
2921     { "f", HAS_ARG, {(void*)opt_format}, "force format", "fmt" },
2922     { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_frame_pix_fmt}, "set pixel format", "format" },
2923     { "stats", OPT_BOOL | OPT_EXPERT, {(void*)&show_status}, "show status", "" },
2924     { "debug", HAS_ARG | OPT_EXPERT, {(void*)opt_debug}, "print specific debug info", "" },
2925     { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&workaround_bugs}, "workaround bugs", "" },
2926     { "vismv", HAS_ARG | OPT_EXPERT, {(void*)opt_vismv}, "visualize motion vectors", "" },
2927     { "fast", OPT_BOOL | OPT_EXPERT, {(void*)&fast}, "non spec compliant optimizations", "" },
2928     { "genpts", OPT_BOOL | OPT_EXPERT, {(void*)&genpts}, "generate pts", "" },
2929     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&decoder_reorder_pts}, "let decoder reorder pts 0=off 1=on -1=auto", ""},
2930     { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&lowres}, "", "" },
2931     { "skiploop", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&skip_loop_filter}, "", "" },
2932     { "skipframe", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&skip_frame}, "", "" },
2933     { "skipidct", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&skip_idct}, "", "" },
2934     { "idct", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&idct}, "set idct algo",  "algo" },
2935     { "er", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&error_recognition}, "set error detection threshold (0-4)",  "threshold" },
2936     { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&error_concealment}, "set error concealment options",  "bit_mask" },
2937     { "sync", HAS_ARG | OPT_EXPERT, {(void*)opt_sync}, "set audio-video sync. type (type=audio/video/ext)", "type" },
2938     { "threads", HAS_ARG | OPT_EXPERT, {(void*)opt_thread_count}, "thread count", "count" },
2939     { "autoexit", OPT_BOOL | OPT_EXPERT, {(void*)&autoexit}, "exit at the end", "" },
2940     { "exitonkeydown", OPT_BOOL | OPT_EXPERT, {(void*)&exit_on_keydown}, "exit on key down", "" },
2941     { "exitonmousedown", OPT_BOOL | OPT_EXPERT, {(void*)&exit_on_mousedown}, "exit on mouse down", "" },
2942     { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&loop}, "set number of times the playback shall be looped", "loop count" },
2943     { "framedrop", OPT_BOOL | OPT_EXPERT, {(void*)&framedrop}, "drop frames when cpu is too slow", "" },
2944     { "window_title", OPT_STRING | HAS_ARG, {(void*)&window_title}, "set window title", "window title" },
2945 #if CONFIG_AVFILTER
2946     { "vf", OPT_STRING | HAS_ARG, {(void*)&vfilters}, "video filters", "filter list" },
2947 #endif
2948     { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, {(void*)&rdftspeed}, "rdft speed", "msecs" },
2949     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {(void*)opt_default}, "generic catch all option", "" },
2950     { "i", 0, {NULL}, "ffmpeg compatibility dummy option", ""},
2951     { NULL, },
2952 };
2953
2954 static void show_usage(void)
2955 {
2956     printf("Simple media player\n");
2957     printf("usage: %s [options] input_file\n", program_name);
2958     printf("\n");
2959 }
2960
2961 static void show_help(void)
2962 {
2963     av_log_set_callback(log_callback_help);
2964     show_usage();
2965     show_help_options(options, "Main options:\n",
2966                       OPT_EXPERT, 0);
2967     show_help_options(options, "\nAdvanced options:\n",
2968                       OPT_EXPERT, OPT_EXPERT);
2969     printf("\n");
2970     av_opt_show2(avcodec_opts[0], NULL,
2971                  AV_OPT_FLAG_DECODING_PARAM, 0);
2972     printf("\n");
2973     av_opt_show2(avformat_opts, NULL,
2974                  AV_OPT_FLAG_DECODING_PARAM, 0);
2975 #if !CONFIG_AVFILTER
2976     printf("\n");
2977     av_opt_show2(sws_opts, NULL,
2978                  AV_OPT_FLAG_ENCODING_PARAM, 0);
2979 #endif
2980     printf("\nWhile playing:\n"
2981            "q, ESC              quit\n"
2982            "f                   toggle full screen\n"
2983            "p, SPC              pause\n"
2984            "a                   cycle audio channel\n"
2985            "v                   cycle video channel\n"
2986            "t                   cycle subtitle channel\n"
2987            "w                   show audio waves\n"
2988            "s                   activate frame-step mode\n"
2989            "left/right          seek backward/forward 10 seconds\n"
2990            "down/up             seek backward/forward 1 minute\n"
2991            "mouse click         seek to percentage in file corresponding to fraction of width\n"
2992            );
2993 }
2994
2995 static void opt_input_file(const char *filename)
2996 {
2997     if (input_filename) {
2998         fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
2999                 filename, input_filename);
3000         exit(1);
3001     }
3002     if (!strcmp(filename, "-"))
3003         filename = "pipe:";
3004     input_filename = filename;
3005 }
3006
3007 /* Called from the main */
3008 int main(int argc, char **argv)
3009 {
3010     int flags;
3011
3012     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3013
3014     /* register all codecs, demux and protocols */
3015     avcodec_register_all();
3016 #if CONFIG_AVDEVICE
3017     avdevice_register_all();
3018 #endif
3019 #if CONFIG_AVFILTER
3020     avfilter_register_all();
3021 #endif
3022     av_register_all();
3023
3024     init_opts();
3025
3026     show_banner();
3027
3028     parse_options(argc, argv, options, opt_input_file);
3029
3030     if (!input_filename) {
3031         show_usage();
3032         fprintf(stderr, "An input file must be specified\n");
3033         fprintf(stderr, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3034         exit(1);
3035     }
3036
3037     if (display_disable) {
3038         video_disable = 1;
3039     }
3040     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
3041 #if !defined(__MINGW32__) && !defined(__APPLE__)
3042     flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */
3043 #endif
3044     if (SDL_Init (flags)) {
3045         fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError());
3046         exit(1);
3047     }
3048
3049     if (!display_disable) {
3050 #if HAVE_SDL_VIDEO_SIZE
3051         const SDL_VideoInfo *vi = SDL_GetVideoInfo();
3052         fs_screen_width = vi->current_w;
3053         fs_screen_height = vi->current_h;
3054 #endif
3055     }
3056
3057     SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
3058     SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
3059     SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
3060
3061     av_init_packet(&flush_pkt);
3062     flush_pkt.data= "FLUSH";
3063
3064     cur_stream = stream_open(input_filename, file_iformat);
3065
3066     event_loop();
3067
3068     /* never returns */
3069
3070     return 0;
3071 }