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 <stdint.h>
  27
  28 #include "libavutil/avstring.h"
  29 #include "libavutil/colorspace.h"
  30 #include "libavutil/mathematics.h"
  31 #include "libavutil/pixdesc.h"
  32 #include "libavutil/imgutils.h"
  33 #include "libavutil/dict.h"
  34 #include "libavutil/parseutils.h"
  35 #include "libavutil/samplefmt.h"
  36 #include "libavutil/time.h"
  37 #include "libavformat/avformat.h"
  38 #include "libavdevice/avdevice.h"
  39 #include "libswscale/swscale.h"
  40 #include "libavresample/avresample.h"
  41 #include "libavutil/opt.h"
  42 #include "libavcodec/avfft.h"
  43
  44 #if CONFIG_AVFILTER
  45 # include "libavfilter/avfilter.h"
  46 # include "libavfilter/buffersink.h"
  47 # include "libavfilter/buffersrc.h"
  48 #endif
  49
  50 #include "cmdutils.h"
  51
  52 #include <SDL.h>
  53 #include <SDL_thread.h>
  54
  55 #ifdef __MINGW32__
  56 #undef main /* We don't want SDL to override our main() */
  57 #endif
  58
  59 #include <assert.h>
  60
  61 const char program_name[] = "avplay";
  62 const int program_birth_year = 2003;
  63
  64 #define MAX_QUEUE_SIZE (15 * 1024 * 1024)
  65 #define MIN_AUDIOQ_SIZE (20 * 16 * 1024)
  66 #define MIN_FRAMES 5
  67
  68 /* SDL audio buffer size, in samples. Should be small to have precise
  69    A/V sync as SDL does not have hardware buffer fullness info. */
  70 #define SDL_AUDIO_BUFFER_SIZE 1024
  71
  72 /* no AV sync correction is done if below the AV sync threshold */
  73 #define AV_SYNC_THRESHOLD 0.01
  74 /* no AV correction is done if too big error */
  75 #define AV_NOSYNC_THRESHOLD 10.0
  76
  77 #define FRAME_SKIP_FACTOR 0.05
  78
  79 /* maximum audio speed change to get correct sync */
  80 #define SAMPLE_CORRECTION_PERCENT_MAX 10
  81
  82 /* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
  83 #define AUDIO_DIFF_AVG_NB   20
  84
  85 /* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
  86 #define SAMPLE_ARRAY_SIZE (2 * 65536)
  87
  88 static int64_t sws_flags = SWS_BICUBIC;
  89
  90 typedef struct PacketQueue {
  91     AVPacketList *first_pkt, *last_pkt;
  92     int nb_packets;
  93     int size;
  94     int abort_request;
  95     SDL_mutex *mutex;
  96     SDL_cond *cond;
  97 } PacketQueue;
  98
  99 #define VIDEO_PICTURE_QUEUE_SIZE 2
 100 #define SUBPICTURE_QUEUE_SIZE 4
 101
 102 typedef struct VideoPicture {
 103     double pts;             // presentation timestamp for this picture
 104     double target_clock;    // av_gettime_relative() time at which this should be displayed ideally
 105     int64_t pos;            // byte position in file
 106     SDL_Overlay *bmp;
 107     int width, height; /* source height & width */
 108     int allocated;
 109     int reallocate;
 110     enum AVPixelFormat pix_fmt;
 111
 112     AVRational sar;
 113 } VideoPicture;
 114
 115 typedef struct SubPicture {
 116     double pts; /* presentation time stamp for this picture */
 117     AVSubtitle sub;
 118 } SubPicture;
 119
 120 enum {
 121     AV_SYNC_AUDIO_MASTER, /* default choice */
 122     AV_SYNC_VIDEO_MASTER,
 123     AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */
 124 };
 125
 126 typedef struct VideoState {
 127     SDL_Thread *parse_tid;
 128     SDL_Thread *video_tid;
 129     SDL_Thread *refresh_tid;
 130     AVInputFormat *iformat;
 131     int no_background;
 132     int abort_request;
 133     int paused;
 134     int last_paused;
 135     int seek_req;
 136     int seek_flags;
 137     int64_t seek_pos;
 138     int64_t seek_rel;
 139     int read_pause_return;
 140     AVFormatContext *ic;
 141
 142     int audio_stream;
 143
 144     int av_sync_type;
 145     double external_clock; /* external clock base */
 146     int64_t external_clock_time;
 147
 148     double audio_clock;
 149     double audio_diff_cum; /* used for AV difference average computation */
 150     double audio_diff_avg_coef;
 151     double audio_diff_threshold;
 152     int audio_diff_avg_count;
 153     AVStream *audio_st;
 154     PacketQueue audioq;
 155     int audio_hw_buf_size;
 156     uint8_t silence_buf[SDL_AUDIO_BUFFER_SIZE];
 157     uint8_t *audio_buf;
 158     uint8_t *audio_buf1;
 159     unsigned int audio_buf_size; /* in bytes */
 160     int audio_buf_index; /* in bytes */
 161     AVPacket audio_pkt_temp;
 162     AVPacket audio_pkt;
 163     enum AVSampleFormat sdl_sample_fmt;
 164     uint64_t sdl_channel_layout;
 165     int sdl_channels;
 166     int sdl_sample_rate;
 167     enum AVSampleFormat resample_sample_fmt;
 168     uint64_t resample_channel_layout;
 169     int resample_sample_rate;
 170     AVAudioResampleContext *avr;
 171     AVFrame *frame;
 172
 173     int show_audio; /* if true, display audio samples */
 174     int16_t sample_array[SAMPLE_ARRAY_SIZE];
 175     int sample_array_index;
 176     int last_i_start;
 177     RDFTContext *rdft;
 178     int rdft_bits;
 179     FFTSample *rdft_data;
 180     int xpos;
 181
 182     SDL_Thread *subtitle_tid;
 183     int subtitle_stream;
 184     int subtitle_stream_changed;
 185     AVStream *subtitle_st;
 186     PacketQueue subtitleq;
 187     SubPicture subpq[SUBPICTURE_QUEUE_SIZE];
 188     int subpq_size, subpq_rindex, subpq_windex;
 189     SDL_mutex *subpq_mutex;
 190     SDL_cond *subpq_cond;
 191
 192     double frame_timer;
 193     double frame_last_pts;
 194     double frame_last_delay;
 195     double video_clock;             // pts of last decoded frame / predicted pts of next decoded frame
 196     int video_stream;
 197     AVStream *video_st;
 198     PacketQueue videoq;
 199     double video_current_pts;       // current displayed pts (different from video_clock if frame fifos are used)
 200     double video_current_pts_drift; // video_current_pts - time (av_gettime_relative) at which we updated video_current_pts - used to have running video pts
 201     int64_t video_current_pos;      // current displayed file pos
 202     VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
 203     int pictq_size, pictq_rindex, pictq_windex;
 204     SDL_mutex *pictq_mutex;
 205     SDL_cond *pictq_cond;
 206 #if !CONFIG_AVFILTER
 207     struct SwsContext *img_convert_ctx;
 208 #endif
 209
 210     //    QETimer *video_timer;
 211     char filename[1024];
 212     int width, height, xleft, ytop;
 213
 214     PtsCorrectionContext pts_ctx;
 215
 216 #if CONFIG_AVFILTER
 217     AVFilterContext *in_video_filter;   // the first filter in the video chain
 218     AVFilterContext *out_video_filter;  // the last filter in the video chain
 219 #endif
 220
 221     float skip_frames;
 222     float skip_frames_index;
 223     int refresh;
 224 } VideoState;
 225
 226 /* options specified by the user */
 227 static AVInputFormat *file_iformat;
 228 static const char *input_filename;
 229 static const char *window_title;
 230 static int fs_screen_width;
 231 static int fs_screen_height;
 232 static int screen_width  = 0;
 233 static int screen_height = 0;
 234 static int audio_disable;
 235 static int video_disable;
 236 static int wanted_stream[AVMEDIA_TYPE_NB] = {
 237     [AVMEDIA_TYPE_AUDIO]    = -1,
 238     [AVMEDIA_TYPE_VIDEO]    = -1,
 239     [AVMEDIA_TYPE_SUBTITLE] = -1,
 240 };
 241 static int seek_by_bytes = -1;
 242 static int display_disable;
 243 static int show_status = 1;
 244 static int av_sync_type = AV_SYNC_AUDIO_MASTER;
 245 static int64_t start_time = AV_NOPTS_VALUE;
 246 static int64_t duration = AV_NOPTS_VALUE;
 247 static int step = 0;
 248 static int workaround_bugs = 1;
 249 static int fast = 0;
 250 static int genpts = 0;
 251 static int idct = FF_IDCT_AUTO;
 252 static enum AVDiscard skip_frame       = AVDISCARD_DEFAULT;
 253 static enum AVDiscard skip_idct        = AVDISCARD_DEFAULT;
 254 static enum AVDiscard skip_loop_filter = AVDISCARD_DEFAULT;
 255 static int error_concealment = 3;
 256 static int decoder_reorder_pts = -1;
 257 static int noautoexit;
 258 static int exit_on_keydown;
 259 static int exit_on_mousedown;
 260 static int loop = 1;
 261 static int framedrop = 1;
 262 static int infinite_buffer = 0;
 263
 264 static int rdftspeed = 20;
 265 #if CONFIG_AVFILTER
 266 static char *vfilters = NULL;
 267 #endif
 268
 269 /* current context */
 270 static int is_full_screen;
 271 static VideoState *cur_stream;
 272 static int64_t audio_callback_time;
 273
 274 static AVPacket flush_pkt;
 275
 276 #define FF_ALLOC_EVENT   (SDL_USEREVENT)
 277 #define FF_REFRESH_EVENT (SDL_USEREVENT + 1)
 278 #define FF_QUIT_EVENT    (SDL_USEREVENT + 2)
 279
 280 static SDL_Surface *screen;
 281
 282 static int packet_queue_put(PacketQueue *q, AVPacket *pkt);
 283
 284 /* packet queue handling */
 285 static void packet_queue_init(PacketQueue *q)
 286 {
 287     memset(q, 0, sizeof(PacketQueue));
 288     q->mutex = SDL_CreateMutex();
 289     q->cond = SDL_CreateCond();
 290     packet_queue_put(q, &flush_pkt);
 291 }
 292
 293 static void packet_queue_flush(PacketQueue *q)
 294 {
 295     AVPacketList *pkt, *pkt1;
 296
 297     SDL_LockMutex(q->mutex);
 298     for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
 299         pkt1 = pkt->next;
 300         av_free_packet(&pkt->pkt);
 301         av_freep(&pkt);
 302     }
 303     q->last_pkt = NULL;
 304     q->first_pkt = NULL;
 305     q->nb_packets = 0;
 306     q->size = 0;
 307     SDL_UnlockMutex(q->mutex);
 308 }
 309
 310 static void packet_queue_end(PacketQueue *q)
 311 {
 312     packet_queue_flush(q);
 313     SDL_DestroyMutex(q->mutex);
 314     SDL_DestroyCond(q->cond);
 315 }
 316
 317 static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
 318 {
 319     AVPacketList *pkt1;
 320
 321     /* duplicate the packet */
 322     if (pkt != &flush_pkt && av_dup_packet(pkt) < 0)
 323         return -1;
 324
 325     pkt1 = av_malloc(sizeof(AVPacketList));
 326     if (!pkt1)
 327         return -1;
 328     pkt1->pkt = *pkt;
 329     pkt1->next = NULL;
 330
 331
 332     SDL_LockMutex(q->mutex);
 333
 334     if (!q->last_pkt)
 335
 336         q->first_pkt = pkt1;
 337     else
 338         q->last_pkt->next = pkt1;
 339     q->last_pkt = pkt1;
 340     q->nb_packets++;
 341     q->size += pkt1->pkt.size + sizeof(*pkt1);
 342     /* XXX: should duplicate packet data in DV case */
 343     SDL_CondSignal(q->cond);
 344
 345     SDL_UnlockMutex(q->mutex);
 346     return 0;
 347 }
 348
 349 static void packet_queue_abort(PacketQueue *q)
 350 {
 351     SDL_LockMutex(q->mutex);
 352
 353     q->abort_request = 1;
 354
 355     SDL_CondSignal(q->cond);
 356
 357     SDL_UnlockMutex(q->mutex);
 358 }
 359
 360 /* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
 361 static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block)
 362 {
 363     AVPacketList *pkt1;
 364     int ret;
 365
 366     SDL_LockMutex(q->mutex);
 367
 368     for (;;) {
 369         if (q->abort_request) {
 370             ret = -1;
 371             break;
 372         }
 373
 374         pkt1 = q->first_pkt;
 375         if (pkt1) {
 376             q->first_pkt = pkt1->next;
 377             if (!q->first_pkt)
 378                 q->last_pkt = NULL;
 379             q->nb_packets--;
 380             q->size -= pkt1->pkt.size + sizeof(*pkt1);
 381             *pkt = pkt1->pkt;
 382             av_free(pkt1);
 383             ret = 1;
 384             break;
 385         } else if (!block) {
 386             ret = 0;
 387             break;
 388         } else {
 389             SDL_CondWait(q->cond, q->mutex);
 390         }
 391     }
 392     SDL_UnlockMutex(q->mutex);
 393     return ret;
 394 }
 395
 396 static inline void fill_rectangle(SDL_Surface *screen,
 397                                   int x, int y, int w, int h, int color)
 398 {
 399     SDL_Rect rect;
 400     rect.x = x;
 401     rect.y = y;
 402     rect.w = w;
 403     rect.h = h;
 404     SDL_FillRect(screen, &rect, color);
 405 }
 406
 407 #define ALPHA_BLEND(a, oldp, newp, s)\
 408 ((((oldp << s) * (255 - (a))) + (newp * (a))) / (255 << s))
 409
 410 #define RGBA_IN(r, g, b, a, s)\
 411 {\
 412     unsigned int v = ((const uint32_t *)(s))[0];\
 413     a = (v >> 24) & 0xff;\
 414     r = (v >> 16) & 0xff;\
 415     g = (v >> 8) & 0xff;\
 416     b = v & 0xff;\
 417 }
 418
 419 #define YUVA_IN(y, u, v, a, s, pal)\
 420 {\
 421     unsigned int val = ((const uint32_t *)(pal))[*(const uint8_t*)(s)];\
 422     a = (val >> 24) & 0xff;\
 423     y = (val >> 16) & 0xff;\
 424     u = (val >> 8) & 0xff;\
 425     v = val & 0xff;\
 426 }
 427
 428 #define YUVA_OUT(d, y, u, v, a)\
 429 {\
 430     ((uint32_t *)(d))[0] = (a << 24) | (y << 16) | (u << 8) | v;\
 431 }
 432
 433
 434 #define BPP 1
 435
 436 static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw, int imgh)
 437 {
 438     int wrap, wrap3, width2, skip2;
 439     int y, u, v, a, u1, v1, a1, w, h;
 440     uint8_t *lum, *cb, *cr;
 441     const uint8_t *p;
 442     const uint32_t *pal;
 443     int dstx, dsty, dstw, dsth;
 444
 445     dstw = av_clip(rect->w, 0, imgw);
 446     dsth = av_clip(rect->h, 0, imgh);
 447     dstx = av_clip(rect->x, 0, imgw - dstw);
 448     dsty = av_clip(rect->y, 0, imgh - dsth);
 449     lum = dst->data[0] + dsty * dst->linesize[0];
 450     cb  = dst->data[1] + (dsty >> 1) * dst->linesize[1];
 451     cr  = dst->data[2] + (dsty >> 1) * dst->linesize[2];
 452
 453     width2 = ((dstw + 1) >> 1) + (dstx & ~dstw & 1);
 454     skip2 = dstx >> 1;
 455     wrap = dst->linesize[0];
 456     wrap3 = rect->pict.linesize[0];
 457     p = rect->pict.data[0];
 458     pal = (const uint32_t *)rect->pict.data[1];  /* Now in YCrCb! */
 459
 460     if (dsty & 1) {
 461         lum += dstx;
 462         cb += skip2;
 463         cr += skip2;
 464
 465         if (dstx & 1) {
 466             YUVA_IN(y, u, v, a, p, pal);
 467             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 468             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
 469             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
 470             cb++;
 471             cr++;
 472             lum++;
 473             p += BPP;
 474         }
 475         for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
 476             YUVA_IN(y, u, v, a, p, pal);
 477             u1 = u;
 478             v1 = v;
 479             a1 = a;
 480             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 481
 482             YUVA_IN(y, u, v, a, p + BPP, pal);
 483             u1 += u;
 484             v1 += v;
 485             a1 += a;
 486             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
 487             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
 488             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
 489             cb++;
 490             cr++;
 491             p += 2 * BPP;
 492             lum += 2;
 493         }
 494         if (w) {
 495             YUVA_IN(y, u, v, a, p, pal);
 496             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 497             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
 498             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
 499             p++;
 500             lum++;
 501         }
 502         p += wrap3 - dstw * BPP;
 503         lum += wrap - dstw - dstx;
 504         cb += dst->linesize[1] - width2 - skip2;
 505         cr += dst->linesize[2] - width2 - skip2;
 506     }
 507     for (h = dsth - (dsty & 1); h >= 2; h -= 2) {
 508         lum += dstx;
 509         cb += skip2;
 510         cr += skip2;
 511
 512         if (dstx & 1) {
 513             YUVA_IN(y, u, v, a, p, pal);
 514             u1 = u;
 515             v1 = v;
 516             a1 = a;
 517             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 518             p += wrap3;
 519             lum += wrap;
 520             YUVA_IN(y, u, v, a, p, pal);
 521             u1 += u;
 522             v1 += v;
 523             a1 += a;
 524             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 525             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
 526             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
 527             cb++;
 528             cr++;
 529             p += -wrap3 + BPP;
 530             lum += -wrap + 1;
 531         }
 532         for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
 533             YUVA_IN(y, u, v, a, p, pal);
 534             u1 = u;
 535             v1 = v;
 536             a1 = a;
 537             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 538
 539             YUVA_IN(y, u, v, a, p + BPP, pal);
 540             u1 += u;
 541             v1 += v;
 542             a1 += a;
 543             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
 544             p += wrap3;
 545             lum += wrap;
 546
 547             YUVA_IN(y, u, v, a, p, pal);
 548             u1 += u;
 549             v1 += v;
 550             a1 += a;
 551             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 552
 553             YUVA_IN(y, u, v, a, p + BPP, pal);
 554             u1 += u;
 555             v1 += v;
 556             a1 += a;
 557             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
 558
 559             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 2);
 560             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 2);
 561
 562             cb++;
 563             cr++;
 564             p += -wrap3 + 2 * BPP;
 565             lum += -wrap + 2;
 566         }
 567         if (w) {
 568             YUVA_IN(y, u, v, a, p, pal);
 569             u1 = u;
 570             v1 = v;
 571             a1 = a;
 572             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 573             p += wrap3;
 574             lum += wrap;
 575             YUVA_IN(y, u, v, a, p, pal);
 576             u1 += u;
 577             v1 += v;
 578             a1 += a;
 579             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 580             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
 581             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
 582             cb++;
 583             cr++;
 584             p += -wrap3 + BPP;
 585             lum += -wrap + 1;
 586         }
 587         p += wrap3 + (wrap3 - dstw * BPP);
 588         lum += wrap + (wrap - dstw - dstx);
 589         cb += dst->linesize[1] - width2 - skip2;
 590         cr += dst->linesize[2] - width2 - skip2;
 591     }
 592     /* handle odd height */
 593     if (h) {
 594         lum += dstx;
 595         cb += skip2;
 596         cr += skip2;
 597
 598         if (dstx & 1) {
 599             YUVA_IN(y, u, v, a, p, pal);
 600             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 601             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
 602             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
 603             cb++;
 604             cr++;
 605             lum++;
 606             p += BPP;
 607         }
 608         for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
 609             YUVA_IN(y, u, v, a, p, pal);
 610             u1 = u;
 611             v1 = v;
 612             a1 = a;
 613             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 614
 615             YUVA_IN(y, u, v, a, p + BPP, pal);
 616             u1 += u;
 617             v1 += v;
 618             a1 += a;
 619             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
 620             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u, 1);
 621             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v, 1);
 622             cb++;
 623             cr++;
 624             p += 2 * BPP;
 625             lum += 2;
 626         }
 627         if (w) {
 628             YUVA_IN(y, u, v, a, p, pal);
 629             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 630             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
 631             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
 632         }
 633     }
 634 }
 635
 636 static void free_subpicture(SubPicture *sp)
 637 {
 638     avsubtitle_free(&sp->sub);
 639 }
 640
 641 static void video_image_display(VideoState *is)
 642 {
 643     VideoPicture *vp;
 644     SubPicture *sp;
 645     AVPicture pict;
 646     float aspect_ratio;
 647     int width, height, x, y;
 648     SDL_Rect rect;
 649     int i;
 650
 651     vp = &is->pictq[is->pictq_rindex];
 652     if (vp->bmp) {
 653 #if CONFIG_AVFILTER
 654          if (!vp->sar.num)
 655              aspect_ratio = 0;
 656          else
 657              aspect_ratio = av_q2d(vp->sar);
 658 #else
 659
 660         /* XXX: use variable in the frame */
 661         if (is->video_st->sample_aspect_ratio.num)
 662             aspect_ratio = av_q2d(is->video_st->sample_aspect_ratio);
 663         else if (is->video_st->codec->sample_aspect_ratio.num)
 664             aspect_ratio = av_q2d(is->video_st->codec->sample_aspect_ratio);
 665         else
 666             aspect_ratio = 0;
 667 #endif
 668         if (aspect_ratio <= 0.0)
 669             aspect_ratio = 1.0;
 670         aspect_ratio *= (float)vp->width / (float)vp->height;
 671
 672         if (is->subtitle_st)
 673         {
 674             if (is->subpq_size > 0)
 675             {
 676                 sp = &is->subpq[is->subpq_rindex];
 677
 678                 if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000))
 679                 {
 680                     SDL_LockYUVOverlay (vp->bmp);
 681
 682                     pict.data[0] = vp->bmp->pixels[0];
 683                     pict.data[1] = vp->bmp->pixels[2];
 684                     pict.data[2] = vp->bmp->pixels[1];
 685
 686                     pict.linesize[0] = vp->bmp->pitches[0];
 687                     pict.linesize[1] = vp->bmp->pitches[2];
 688                     pict.linesize[2] = vp->bmp->pitches[1];
 689
 690                     for (i = 0; i < sp->sub.num_rects; i++)
 691                         blend_subrect(&pict, sp->sub.rects[i],
 692                                       vp->bmp->w, vp->bmp->h);
 693
 694                     SDL_UnlockYUVOverlay (vp->bmp);
 695                 }
 696             }
 697         }
 698
 699
 700         /* XXX: we suppose the screen has a 1.0 pixel ratio */
 701         height = is->height;
 702         width = ((int)rint(height * aspect_ratio)) & ~1;
 703         if (width > is->width) {
 704             width = is->width;
 705             height = ((int)rint(width / aspect_ratio)) & ~1;
 706         }
 707         x = (is->width - width) / 2;
 708         y = (is->height - height) / 2;
 709         is->no_background = 0;
 710         rect.x = is->xleft + x;
 711         rect.y = is->ytop  + y;
 712         rect.w = width;
 713         rect.h = height;
 714         SDL_DisplayYUVOverlay(vp->bmp, &rect);
 715     }
 716 }
 717
 718 /* get the current audio output buffer size, in samples. With SDL, we
 719    cannot have a precise information */
 720 static int audio_write_get_buf_size(VideoState *is)
 721 {
 722     return is->audio_buf_size - is->audio_buf_index;
 723 }
 724
 725 static inline int compute_mod(int a, int b)
 726 {
 727     a = a % b;
 728     if (a >= 0)
 729         return a;
 730     else
 731         return a + b;
 732 }
 733
 734 static void video_audio_display(VideoState *s)
 735 {
 736     int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
 737     int ch, channels, h, h2, bgcolor, fgcolor;
 738     int16_t time_diff;
 739     int rdft_bits, nb_freq;
 740
 741     for (rdft_bits = 1; (1 << rdft_bits) < 2 * s->height; rdft_bits++)
 742         ;
 743     nb_freq = 1 << (rdft_bits - 1);
 744
 745     /* compute display index : center on currently output samples */
 746     channels = s->sdl_channels;
 747     nb_display_channels = channels;
 748     if (!s->paused) {
 749         int data_used = s->show_audio == 1 ? s->width : (2 * nb_freq);
 750         n = 2 * channels;
 751         delay = audio_write_get_buf_size(s);
 752         delay /= n;
 753
 754         /* to be more precise, we take into account the time spent since
 755            the last buffer computation */
 756         if (audio_callback_time) {
 757             time_diff = av_gettime_relative() - audio_callback_time;
 758             delay -= (time_diff * s->sdl_sample_rate) / 1000000;
 759         }
 760
 761         delay += 2 * data_used;
 762         if (delay < data_used)
 763             delay = data_used;
 764
 765         i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
 766         if (s->show_audio == 1) {
 767             h = INT_MIN;
 768             for (i = 0; i < 1000; i += channels) {
 769                 int idx = (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
 770                 int a = s->sample_array[idx];
 771                 int b = s->sample_array[(idx + 4 * channels) % SAMPLE_ARRAY_SIZE];
 772                 int c = s->sample_array[(idx + 5 * channels) % SAMPLE_ARRAY_SIZE];
 773                 int d = s->sample_array[(idx + 9 * channels) % SAMPLE_ARRAY_SIZE];
 774                 int score = a - d;
 775                 if (h < score && (b ^ c) < 0) {
 776                     h = score;
 777                     i_start = idx;
 778                 }
 779             }
 780         }
 781
 782         s->last_i_start = i_start;
 783     } else {
 784         i_start = s->last_i_start;
 785     }
 786
 787     bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
 788     if (s->show_audio == 1) {
 789         fill_rectangle(screen,
 790                        s->xleft, s->ytop, s->width, s->height,
 791                        bgcolor);
 792
 793         fgcolor = SDL_MapRGB(screen->format, 0xff, 0xff, 0xff);
 794
 795         /* total height for one channel */
 796         h = s->height / nb_display_channels;
 797         /* graph height / 2 */
 798         h2 = (h * 9) / 20;
 799         for (ch = 0; ch < nb_display_channels; ch++) {
 800             i = i_start + ch;
 801             y1 = s->ytop + ch * h + (h / 2); /* position of center line */
 802             for (x = 0; x < s->width; x++) {
 803                 y = (s->sample_array[i] * h2) >> 15;
 804                 if (y < 0) {
 805                     y = -y;
 806                     ys = y1 - y;
 807                 } else {
 808                     ys = y1;
 809                 }
 810                 fill_rectangle(screen,
 811                                s->xleft + x, ys, 1, y,
 812                                fgcolor);
 813                 i += channels;
 814                 if (i >= SAMPLE_ARRAY_SIZE)
 815                     i -= SAMPLE_ARRAY_SIZE;
 816             }
 817         }
 818
 819         fgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0xff);
 820
 821         for (ch = 1; ch < nb_display_channels; ch++) {
 822             y = s->ytop + ch * h;
 823             fill_rectangle(screen,
 824                            s->xleft, y, s->width, 1,
 825                            fgcolor);
 826         }
 827         SDL_UpdateRect(screen, s->xleft, s->ytop, s->width, s->height);
 828     } else {
 829         nb_display_channels= FFMIN(nb_display_channels, 2);
 830         if (rdft_bits != s->rdft_bits) {
 831             av_rdft_end(s->rdft);
 832             av_free(s->rdft_data);
 833             s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
 834             s->rdft_bits = rdft_bits;
 835             s->rdft_data = av_malloc(4 * nb_freq * sizeof(*s->rdft_data));
 836         }
 837         {
 838             FFTSample *data[2];
 839             for (ch = 0; ch < nb_display_channels; ch++) {
 840                 data[ch] = s->rdft_data + 2 * nb_freq * ch;
 841                 i = i_start + ch;
 842                 for (x = 0; x < 2 * nb_freq; x++) {
 843                     double w = (x-nb_freq) * (1.0 / nb_freq);
 844                     data[ch][x] = s->sample_array[i] * (1.0 - w * w);
 845                     i += channels;
 846                     if (i >= SAMPLE_ARRAY_SIZE)
 847                         i -= SAMPLE_ARRAY_SIZE;
 848                 }
 849                 av_rdft_calc(s->rdft, data[ch]);
 850             }
 851             /* Least efficient way to do this, we should of course
 852              * directly access it but it is more than fast enough. */
 853             for (y = 0; y < s->height; y++) {
 854                 double w = 1 / sqrt(nb_freq);
 855                 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]));
 856                 int b = (nb_display_channels == 2 ) ? sqrt(w * sqrt(data[1][2 * y + 0] * data[1][2 * y + 0]
 857                        + data[1][2 * y + 1] * data[1][2 * y + 1])) : a;
 858                 a = FFMIN(a, 255);
 859                 b = FFMIN(b, 255);
 860                 fgcolor = SDL_MapRGB(screen->format, a, b, (a + b) / 2);
 861
 862                 fill_rectangle(screen,
 863                             s->xpos, s->height-y, 1, 1,
 864                             fgcolor);
 865             }
 866         }
 867         SDL_UpdateRect(screen, s->xpos, s->ytop, 1, s->height);
 868         s->xpos++;
 869         if (s->xpos >= s->width)
 870             s->xpos= s->xleft;
 871     }
 872 }
 873
 874 static int video_open(VideoState *is)
 875 {
 876     int flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
 877     int w,h;
 878
 879     if (is_full_screen) flags |= SDL_FULLSCREEN;
 880     else                flags |= SDL_RESIZABLE;
 881
 882     if (is_full_screen && fs_screen_width) {
 883         w = fs_screen_width;
 884         h = fs_screen_height;
 885     } else if (!is_full_screen && screen_width) {
 886         w = screen_width;
 887         h = screen_height;
 888 #if CONFIG_AVFILTER
 889     } else if (is->out_video_filter && is->out_video_filter->inputs[0]) {
 890         w = is->out_video_filter->inputs[0]->w;
 891         h = is->out_video_filter->inputs[0]->h;
 892 #else
 893     } else if (is->video_st && is->video_st->codec->width) {
 894         w = is->video_st->codec->width;
 895         h = is->video_st->codec->height;
 896 #endif
 897     } else {
 898         w = 640;
 899         h = 480;
 900     }
 901     if (screen && is->width == screen->w && screen->w == w
 902        && is->height== screen->h && screen->h == h)
 903         return 0;
 904
 905 #if defined(__APPLE__) && !SDL_VERSION_ATLEAST(1, 2, 14)
 906     /* setting bits_per_pixel = 0 or 32 causes blank video on OS X and older SDL */
 907     screen = SDL_SetVideoMode(w, h, 24, flags);
 908 #else
 909     screen = SDL_SetVideoMode(w, h, 0, flags);
 910 #endif
 911     if (!screen) {
 912         fprintf(stderr, "SDL: could not set video mode - exiting\n");
 913         return -1;
 914     }
 915     if (!window_title)
 916         window_title = input_filename;
 917     SDL_WM_SetCaption(window_title, window_title);
 918
 919     is->width  = screen->w;
 920     is->height = screen->h;
 921
 922     return 0;
 923 }
 924
 925 /* display the current picture, if any */
 926 static void video_display(VideoState *is)
 927 {
 928     if (!screen)
 929         video_open(cur_stream);
 930     if (is->audio_st && is->show_audio)
 931         video_audio_display(is);
 932     else if (is->video_st)
 933         video_image_display(is);
 934 }
 935
 936 static int refresh_thread(void *opaque)
 937 {
 938     VideoState *is= opaque;
 939     while (!is->abort_request) {
 940         SDL_Event event;
 941         event.type = FF_REFRESH_EVENT;
 942         event.user.data1 = opaque;
 943         if (!is->refresh) {
 944             is->refresh = 1;
 945             SDL_PushEvent(&event);
 946         }
 947         av_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
 948     }
 949     return 0;
 950 }
 951
 952 /* get the current audio clock value */
 953 static double get_audio_clock(VideoState *is)
 954 {
 955     double pts;
 956     int hw_buf_size, bytes_per_sec;
 957     pts = is->audio_clock;
 958     hw_buf_size = audio_write_get_buf_size(is);
 959     bytes_per_sec = 0;
 960     if (is->audio_st) {
 961         bytes_per_sec = is->sdl_sample_rate * is->sdl_channels *
 962                         av_get_bytes_per_sample(is->sdl_sample_fmt);
 963     }
 964     if (bytes_per_sec)
 965         pts -= (double)hw_buf_size / bytes_per_sec;
 966     return pts;
 967 }
 968
 969 /* get the current video clock value */
 970 static double get_video_clock(VideoState *is)
 971 {
 972     if (is->paused) {
 973         return is->video_current_pts;
 974     } else {
 975         return is->video_current_pts_drift + av_gettime_relative() / 1000000.0;
 976     }
 977 }
 978
 979 /* get the current external clock value */
 980 static double get_external_clock(VideoState *is)
 981 {
 982     int64_t ti;
 983     ti = av_gettime_relative();
 984     return is->external_clock + ((ti - is->external_clock_time) * 1e-6);
 985 }
 986
 987 /* get the current master clock value */
 988 static double get_master_clock(VideoState *is)
 989 {
 990     double val;
 991
 992     if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
 993         if (is->video_st)
 994             val = get_video_clock(is);
 995         else
 996             val = get_audio_clock(is);
 997     } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
 998         if (is->audio_st)
 999             val = get_audio_clock(is);
1000         else
1001             val = get_video_clock(is);
1002     } else {
1003         val = get_external_clock(is);
1004     }
1005     return val;
1006 }
1007
1008 /* seek in the stream */
1009 static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_bytes)
1010 {
1011     if (!is->seek_req) {
1012         is->seek_pos = pos;
1013         is->seek_rel = rel;
1014         is->seek_flags &= ~AVSEEK_FLAG_BYTE;
1015         if (seek_by_bytes)
1016             is->seek_flags |= AVSEEK_FLAG_BYTE;
1017         is->seek_req = 1;
1018     }
1019 }
1020
1021 /* pause or resume the video */
1022 static void stream_pause(VideoState *is)
1023 {
1024     if (is->paused) {
1025         is->frame_timer += av_gettime_relative() / 1000000.0 + is->video_current_pts_drift - is->video_current_pts;
1026         if (is->read_pause_return != AVERROR(ENOSYS)) {
1027             is->video_current_pts = is->video_current_pts_drift + av_gettime_relative() / 1000000.0;
1028         }
1029         is->video_current_pts_drift = is->video_current_pts - av_gettime_relative() / 1000000.0;
1030     }
1031     is->paused = !is->paused;
1032 }
1033
1034 static double compute_target_time(double frame_current_pts, VideoState *is)
1035 {
1036     double delay, sync_threshold, diff;
1037
1038     /* compute nominal delay */
1039     delay = frame_current_pts - is->frame_last_pts;
1040     if (delay <= 0 || delay >= 10.0) {
1041         /* if incorrect delay, use previous one */
1042         delay = is->frame_last_delay;
1043     } else {
1044         is->frame_last_delay = delay;
1045     }
1046     is->frame_last_pts = frame_current_pts;
1047
1048     /* update delay to follow master synchronisation source */
1049     if (((is->av_sync_type == AV_SYNC_AUDIO_MASTER && is->audio_st) ||
1050          is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)) {
1051         /* if video is slave, we try to correct big delays by
1052            duplicating or deleting a frame */
1053         diff = get_video_clock(is) - get_master_clock(is);
1054
1055         /* skip or repeat frame. We take into account the
1056            delay to compute the threshold. I still don't know
1057            if it is the best guess */
1058         sync_threshold = FFMAX(AV_SYNC_THRESHOLD, delay);
1059         if (fabs(diff) < AV_NOSYNC_THRESHOLD) {
1060             if (diff <= -sync_threshold)
1061                 delay = 0;
1062             else if (diff >= sync_threshold)
1063                 delay = 2 * delay;
1064         }
1065     }
1066     is->frame_timer += delay;
1067
1068     av_dlog(NULL, "video: delay=%0.3f pts=%0.3f A-V=%f\n",
1069             delay, frame_current_pts, -diff);
1070
1071     return is->frame_timer;
1072 }
1073
1074 /* called to display each frame */
1075 static void video_refresh_timer(void *opaque)
1076 {
1077     VideoState *is = opaque;
1078     VideoPicture *vp;
1079
1080     SubPicture *sp, *sp2;
1081
1082     if (is->video_st) {
1083 retry:
1084         if (is->pictq_size == 0) {
1085             // nothing to do, no picture to display in the que
1086         } else {
1087             double time = av_gettime_relative() / 1000000.0;
1088             double next_target;
1089             /* dequeue the picture */
1090             vp = &is->pictq[is->pictq_rindex];
1091
1092             if (time < vp->target_clock)
1093                 return;
1094             /* update current video pts */
1095             is->video_current_pts = vp->pts;
1096             is->video_current_pts_drift = is->video_current_pts - time;
1097             is->video_current_pos = vp->pos;
1098             if (is->pictq_size > 1) {
1099                 VideoPicture *nextvp = &is->pictq[(is->pictq_rindex + 1) % VIDEO_PICTURE_QUEUE_SIZE];
1100                 assert(nextvp->target_clock >= vp->target_clock);
1101                 next_target= nextvp->target_clock;
1102             } else {
1103                 next_target = vp->target_clock + is->video_clock - vp->pts; // FIXME pass durations cleanly
1104             }
1105             if (framedrop && time > next_target) {
1106                 is->skip_frames *= 1.0 + FRAME_SKIP_FACTOR;
1107                 if (is->pictq_size > 1 || time > next_target + 0.5) {
1108                     /* update queue size and signal for next picture */
1109                     if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
1110                         is->pictq_rindex = 0;
1111
1112                     SDL_LockMutex(is->pictq_mutex);
1113                     is->pictq_size--;
1114                     SDL_CondSignal(is->pictq_cond);
1115                     SDL_UnlockMutex(is->pictq_mutex);
1116                     goto retry;
1117                 }
1118             }
1119
1120             if (is->subtitle_st) {
1121                 if (is->subtitle_stream_changed) {
1122                     SDL_LockMutex(is->subpq_mutex);
1123
1124                     while (is->subpq_size) {
1125                         free_subpicture(&is->subpq[is->subpq_rindex]);
1126
1127                         /* update queue size and signal for next picture */
1128                         if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
1129                             is->subpq_rindex = 0;
1130
1131                         is->subpq_size--;
1132                     }
1133                     is->subtitle_stream_changed = 0;
1134
1135                     SDL_CondSignal(is->subpq_cond);
1136                     SDL_UnlockMutex(is->subpq_mutex);
1137                 } else {
1138                     if (is->subpq_size > 0) {
1139                         sp = &is->subpq[is->subpq_rindex];
1140
1141                         if (is->subpq_size > 1)
1142                             sp2 = &is->subpq[(is->subpq_rindex + 1) % SUBPICTURE_QUEUE_SIZE];
1143                         else
1144                             sp2 = NULL;
1145
1146                         if ((is->video_current_pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
1147                                 || (sp2 && is->video_current_pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
1148                         {
1149                             free_subpicture(sp);
1150
1151                             /* update queue size and signal for next picture */
1152                             if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
1153                                 is->subpq_rindex = 0;
1154
1155                             SDL_LockMutex(is->subpq_mutex);
1156                             is->subpq_size--;
1157                             SDL_CondSignal(is->subpq_cond);
1158                             SDL_UnlockMutex(is->subpq_mutex);
1159                         }
1160                     }
1161                 }
1162             }
1163
1164             /* display picture */
1165             if (!display_disable)
1166                 video_display(is);
1167
1168             /* update queue size and signal for next picture */
1169             if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
1170                 is->pictq_rindex = 0;
1171
1172             SDL_LockMutex(is->pictq_mutex);
1173             is->pictq_size--;
1174             SDL_CondSignal(is->pictq_cond);
1175             SDL_UnlockMutex(is->pictq_mutex);
1176         }
1177     } else if (is->audio_st) {
1178         /* draw the next audio frame */
1179
1180         /* if only audio stream, then display the audio bars (better
1181            than nothing, just to test the implementation */
1182
1183         /* display picture */
1184         if (!display_disable)
1185             video_display(is);
1186     }
1187     if (show_status) {
1188         static int64_t last_time;
1189         int64_t cur_time;
1190         int aqsize, vqsize, sqsize;
1191         double av_diff;
1192
1193         cur_time = av_gettime_relative();
1194         if (!last_time || (cur_time - last_time) >= 30000) {
1195             aqsize = 0;
1196             vqsize = 0;
1197             sqsize = 0;
1198             if (is->audio_st)
1199                 aqsize = is->audioq.size;
1200             if (is->video_st)
1201                 vqsize = is->videoq.size;
1202             if (is->subtitle_st)
1203                 sqsize = is->subtitleq.size;
1204             av_diff = 0;
1205             if (is->audio_st && is->video_st)
1206                 av_diff = get_audio_clock(is) - get_video_clock(is);
1207             printf("%7.2f A-V:%7.3f s:%3.1f aq=%5dKB vq=%5dKB sq=%5dB f=%"PRId64"/%"PRId64"   \r",
1208                    get_master_clock(is), av_diff, FFMAX(is->skip_frames - 1, 0), aqsize / 1024,
1209                    vqsize / 1024, sqsize, is->pts_ctx.num_faulty_dts, is->pts_ctx.num_faulty_pts);
1210             fflush(stdout);
1211             last_time = cur_time;
1212         }
1213     }
1214 }
1215
1216 static void stream_close(VideoState *is)
1217 {
1218     VideoPicture *vp;
1219     int i;
1220     /* XXX: use a special url_shutdown call to abort parse cleanly */
1221     is->abort_request = 1;
1222     SDL_WaitThread(is->parse_tid, NULL);
1223     SDL_WaitThread(is->refresh_tid, NULL);
1224
1225     /* free all pictures */
1226     for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++) {
1227         vp = &is->pictq[i];
1228         if (vp->bmp) {
1229             SDL_FreeYUVOverlay(vp->bmp);
1230             vp->bmp = NULL;
1231         }
1232     }
1233     SDL_DestroyMutex(is->pictq_mutex);
1234     SDL_DestroyCond(is->pictq_cond);
1235     SDL_DestroyMutex(is->subpq_mutex);
1236     SDL_DestroyCond(is->subpq_cond);
1237 #if !CONFIG_AVFILTER
1238     if (is->img_convert_ctx)
1239         sws_freeContext(is->img_convert_ctx);
1240 #endif
1241     av_free(is);
1242 }
1243
1244 static void do_exit(void)
1245 {
1246     if (cur_stream) {
1247         stream_close(cur_stream);
1248         cur_stream = NULL;
1249     }
1250     uninit_opts();
1251     avformat_network_deinit();
1252     if (show_status)
1253         printf("\n");
1254     SDL_Quit();
1255     av_log(NULL, AV_LOG_QUIET, "");
1256     exit(0);
1257 }
1258
1259 /* allocate a picture (needs to do that in main thread to avoid
1260    potential locking problems */
1261 static void alloc_picture(void *opaque)
1262 {
1263     VideoState *is = opaque;
1264     VideoPicture *vp;
1265
1266     vp = &is->pictq[is->pictq_windex];
1267
1268     if (vp->bmp)
1269         SDL_FreeYUVOverlay(vp->bmp);
1270
1271 #if CONFIG_AVFILTER
1272     vp->width   = is->out_video_filter->inputs[0]->w;
1273     vp->height  = is->out_video_filter->inputs[0]->h;
1274     vp->pix_fmt = is->out_video_filter->inputs[0]->format;
1275 #else
1276     vp->width   = is->video_st->codec->width;
1277     vp->height  = is->video_st->codec->height;
1278     vp->pix_fmt = is->video_st->codec->pix_fmt;
1279 #endif
1280
1281     vp->bmp = SDL_CreateYUVOverlay(vp->width, vp->height,
1282                                    SDL_YV12_OVERLAY,
1283                                    screen);
1284     if (!vp->bmp || vp->bmp->pitches[0] < vp->width) {
1285         /* SDL allocates a buffer smaller than requested if the video
1286          * overlay hardware is unable to support the requested size. */
1287         fprintf(stderr, "Error: the video system does not support an image\n"
1288                         "size of %dx%d pixels. Try using -vf \"scale=w:h\"\n"
1289                         "to reduce the image size.\n", vp->width, vp->height );
1290         do_exit();
1291     }
1292
1293     SDL_LockMutex(is->pictq_mutex);
1294     vp->allocated = 1;
1295     SDL_CondSignal(is->pictq_cond);
1296     SDL_UnlockMutex(is->pictq_mutex);
1297 }
1298
1299 /* The 'pts' parameter is the dts of the packet / pts of the frame and
1300  * guessed if not known. */
1301 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts, int64_t pos)
1302 {
1303     VideoPicture *vp;
1304 #if CONFIG_AVFILTER
1305     AVPicture pict_src;
1306 #else
1307     int dst_pix_fmt = AV_PIX_FMT_YUV420P;
1308 #endif
1309     /* wait until we have space to put a new picture */
1310     SDL_LockMutex(is->pictq_mutex);
1311
1312     if (is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE && !is->refresh)
1313         is->skip_frames = FFMAX(1.0 - FRAME_SKIP_FACTOR, is->skip_frames * (1.0 - FRAME_SKIP_FACTOR));
1314
1315     while (is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE &&
1316            !is->videoq.abort_request) {
1317         SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1318     }
1319     SDL_UnlockMutex(is->pictq_mutex);
1320
1321     if (is->videoq.abort_request)
1322         return -1;
1323
1324     vp = &is->pictq[is->pictq_windex];
1325
1326     vp->sar = src_frame->sample_aspect_ratio;
1327
1328     /* alloc or resize hardware picture buffer */
1329     if (!vp->bmp || vp->reallocate ||
1330 #if CONFIG_AVFILTER
1331         vp->width  != is->out_video_filter->inputs[0]->w ||
1332         vp->height != is->out_video_filter->inputs[0]->h) {
1333 #else
1334         vp->width != is->video_st->codec->width ||
1335         vp->height != is->video_st->codec->height) {
1336 #endif
1337         SDL_Event event;
1338
1339         vp->allocated  = 0;
1340         vp->reallocate = 0;
1341
1342         /* the allocation must be done in the main thread to avoid
1343            locking problems */
1344         event.type = FF_ALLOC_EVENT;
1345         event.user.data1 = is;
1346         SDL_PushEvent(&event);
1347
1348         /* wait until the picture is allocated */
1349         SDL_LockMutex(is->pictq_mutex);
1350         while (!vp->allocated && !is->videoq.abort_request) {
1351             SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1352         }
1353         SDL_UnlockMutex(is->pictq_mutex);
1354
1355         if (is->videoq.abort_request)
1356             return -1;
1357     }
1358
1359     /* if the frame is not skipped, then display it */
1360     if (vp->bmp) {
1361         AVPicture pict = { { 0 } };
1362
1363         /* get a pointer on the bitmap */
1364         SDL_LockYUVOverlay (vp->bmp);
1365
1366         pict.data[0] = vp->bmp->pixels[0];
1367         pict.data[1] = vp->bmp->pixels[2];
1368         pict.data[2] = vp->bmp->pixels[1];
1369
1370         pict.linesize[0] = vp->bmp->pitches[0];
1371         pict.linesize[1] = vp->bmp->pitches[2];
1372         pict.linesize[2] = vp->bmp->pitches[1];
1373
1374 #if CONFIG_AVFILTER
1375         pict_src.data[0] = src_frame->data[0];
1376         pict_src.data[1] = src_frame->data[1];
1377         pict_src.data[2] = src_frame->data[2];
1378
1379         pict_src.linesize[0] = src_frame->linesize[0];
1380         pict_src.linesize[1] = src_frame->linesize[1];
1381         pict_src.linesize[2] = src_frame->linesize[2];
1382
1383         // FIXME use direct rendering
1384         av_picture_copy(&pict, &pict_src,
1385                         vp->pix_fmt, vp->width, vp->height);
1386 #else
1387         av_opt_get_int(sws_opts, "sws_flags", 0, &sws_flags);
1388         is->img_convert_ctx = sws_getCachedContext(is->img_convert_ctx,
1389             vp->width, vp->height, vp->pix_fmt, vp->width, vp->height,
1390             dst_pix_fmt, sws_flags, NULL, NULL, NULL);
1391         if (!is->img_convert_ctx) {
1392             fprintf(stderr, "Cannot initialize the conversion context\n");
1393             exit(1);
1394         }
1395         sws_scale(is->img_convert_ctx, src_frame->data, src_frame->linesize,
1396                   0, vp->height, pict.data, pict.linesize);
1397 #endif
1398         /* update the bitmap content */
1399         SDL_UnlockYUVOverlay(vp->bmp);
1400
1401         vp->pts = pts;
1402         vp->pos = pos;
1403
1404         /* now we can update the picture count */
1405         if (++is->pictq_windex == VIDEO_PICTURE_QUEUE_SIZE)
1406             is->pictq_windex = 0;
1407         SDL_LockMutex(is->pictq_mutex);
1408         vp->target_clock = compute_target_time(vp->pts, is);
1409
1410         is->pictq_size++;
1411         SDL_UnlockMutex(is->pictq_mutex);
1412     }
1413     return 0;
1414 }
1415
1416 /* Compute the exact PTS for the picture if it is omitted in the stream.
1417  * The 'pts1' parameter is the dts of the packet / pts of the frame. */
1418 static int output_picture2(VideoState *is, AVFrame *src_frame, double pts1, int64_t pos)
1419 {
1420     double frame_delay, pts;
1421     int ret;
1422
1423     pts = pts1;
1424
1425     if (pts != 0) {
1426         /* update video clock with pts, if present */
1427         is->video_clock = pts;
1428     } else {
1429         pts = is->video_clock;
1430     }
1431     /* update video clock for next frame */
1432     frame_delay = av_q2d(is->video_st->codec->time_base);
1433     /* for MPEG2, the frame can be repeated, so we update the
1434        clock accordingly */
1435     frame_delay += src_frame->repeat_pict * (frame_delay * 0.5);
1436     is->video_clock += frame_delay;
1437
1438     ret = queue_picture(is, src_frame, pts, pos);
1439     av_frame_unref(src_frame);
1440     return ret;
1441 }
1442
1443 static int get_video_frame(VideoState *is, AVFrame *frame, int64_t *pts, AVPacket *pkt)
1444 {
1445     int got_picture, i;
1446
1447     if (packet_queue_get(&is->videoq, pkt, 1) < 0)
1448         return -1;
1449
1450     if (pkt->data == flush_pkt.data) {
1451         avcodec_flush_buffers(is->video_st->codec);
1452
1453         SDL_LockMutex(is->pictq_mutex);
1454         // Make sure there are no long delay timers (ideally we should just flush the que but thats harder)
1455         for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++) {
1456             is->pictq[i].target_clock= 0;
1457         }
1458         while (is->pictq_size && !is->videoq.abort_request) {
1459             SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1460         }
1461         is->video_current_pos = -1;
1462         SDL_UnlockMutex(is->pictq_mutex);
1463
1464         init_pts_correction(&is->pts_ctx);
1465         is->frame_last_pts = AV_NOPTS_VALUE;
1466         is->frame_last_delay = 0;
1467         is->frame_timer = (double)av_gettime_relative() / 1000000.0;
1468         is->skip_frames = 1;
1469         is->skip_frames_index = 0;
1470         return 0;
1471     }
1472
1473     avcodec_decode_video2(is->video_st->codec, frame, &got_picture, pkt);
1474
1475     if (got_picture) {
1476         if (decoder_reorder_pts == -1) {
1477             *pts = guess_correct_pts(&is->pts_ctx, frame->pkt_pts, frame->pkt_dts);
1478         } else if (decoder_reorder_pts) {
1479             *pts = frame->pkt_pts;
1480         } else {
1481             *pts = frame->pkt_dts;
1482         }
1483
1484         if (*pts == AV_NOPTS_VALUE) {
1485             *pts = 0;
1486         }
1487         if (is->video_st->sample_aspect_ratio.num) {
1488             frame->sample_aspect_ratio = is->video_st->sample_aspect_ratio;
1489         }
1490
1491         is->skip_frames_index += 1;
1492         if (is->skip_frames_index >= is->skip_frames) {
1493             is->skip_frames_index -= FFMAX(is->skip_frames, 1.0);
1494             return 1;
1495         }
1496         av_frame_unref(frame);
1497     }
1498     return 0;
1499 }
1500
1501 #if CONFIG_AVFILTER
1502 static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const char *vfilters)
1503 {
1504     char sws_flags_str[128];
1505     char buffersrc_args[256];
1506     int ret;
1507     AVFilterContext *filt_src = NULL, *filt_out = NULL, *filt_format;
1508     AVCodecContext *codec = is->video_st->codec;
1509
1510     snprintf(sws_flags_str, sizeof(sws_flags_str), "flags=%"PRId64, sws_flags);
1511     graph->scale_sws_opts = av_strdup(sws_flags_str);
1512
1513     snprintf(buffersrc_args, sizeof(buffersrc_args), "%d:%d:%d:%d:%d:%d:%d",
1514              codec->width, codec->height, codec->pix_fmt,
1515              is->video_st->time_base.num, is->video_st->time_base.den,
1516              codec->sample_aspect_ratio.num, codec->sample_aspect_ratio.den);
1517
1518
1519     if ((ret = avfilter_graph_create_filter(&filt_src,
1520                                             avfilter_get_by_name("buffer"),
1521                                             "src", buffersrc_args, NULL,
1522                                             graph)) < 0)
1523         return ret;
1524     if ((ret = avfilter_graph_create_filter(&filt_out,
1525                                             avfilter_get_by_name("buffersink"),
1526                                             "out", NULL, NULL, graph)) < 0)
1527         return ret;
1528
1529     if ((ret = avfilter_graph_create_filter(&filt_format,
1530                                             avfilter_get_by_name("format"),
1531                                             "format", "yuv420p", NULL, graph)) < 0)
1532         return ret;
1533     if ((ret = avfilter_link(filt_format, 0, filt_out, 0)) < 0)
1534         return ret;
1535
1536
1537     if (vfilters) {
1538         AVFilterInOut *outputs = avfilter_inout_alloc();
1539         AVFilterInOut *inputs  = avfilter_inout_alloc();
1540
1541         outputs->name    = av_strdup("in");
1542         outputs->filter_ctx = filt_src;
1543         outputs->pad_idx = 0;
1544         outputs->next    = NULL;
1545
1546         inputs->name    = av_strdup("out");
1547         inputs->filter_ctx = filt_format;
1548         inputs->pad_idx = 0;
1549         inputs->next    = NULL;
1550
1551         if ((ret = avfilter_graph_parse(graph, vfilters, inputs, outputs, NULL)) < 0)
1552             return ret;
1553     } else {
1554         if ((ret = avfilter_link(filt_src, 0, filt_format, 0)) < 0)
1555             return ret;
1556     }
1557
1558     if ((ret = avfilter_graph_config(graph, NULL)) < 0)
1559         return ret;
1560
1561     is->in_video_filter  = filt_src;
1562     is->out_video_filter = filt_out;
1563
1564     return ret;
1565 }
1566
1567 #endif  /* CONFIG_AVFILTER */
1568
1569 static int video_thread(void *arg)
1570 {
1571     AVPacket pkt = { 0 };
1572     VideoState *is = arg;
1573     AVFrame *frame = av_frame_alloc();
1574     int64_t pts_int;
1575     double pts;
1576     int ret;
1577
1578 #if CONFIG_AVFILTER
1579     AVFilterGraph *graph = avfilter_graph_alloc();
1580     AVFilterContext *filt_out = NULL, *filt_in = NULL;
1581     int last_w = is->video_st->codec->width;
1582     int last_h = is->video_st->codec->height;
1583
1584     if ((ret = configure_video_filters(graph, is, vfilters)) < 0)
1585         goto the_end;
1586     filt_in  = is->in_video_filter;
1587     filt_out = is->out_video_filter;
1588 #endif
1589
1590     if (!frame)
1591         return AVERROR(ENOMEM);
1592
1593     for (;;) {
1594 #if CONFIG_AVFILTER
1595         AVRational tb;
1596 #endif
1597         while (is->paused && !is->videoq.abort_request)
1598             SDL_Delay(10);
1599
1600         av_free_packet(&pkt);
1601
1602         ret = get_video_frame(is, frame, &pts_int, &pkt);
1603         if (ret < 0)
1604             goto the_end;
1605
1606         if (!ret)
1607             continue;
1608
1609 #if CONFIG_AVFILTER
1610         if (   last_w != is->video_st->codec->width
1611             || last_h != is->video_st->codec->height) {
1612             av_dlog(NULL, "Changing size %dx%d -> %dx%d\n", last_w, last_h,
1613                     is->video_st->codec->width, is->video_st->codec->height);
1614             avfilter_graph_free(&graph);
1615             graph = avfilter_graph_alloc();
1616             if ((ret = configure_video_filters(graph, is, vfilters)) < 0)
1617                 goto the_end;
1618             filt_in  = is->in_video_filter;
1619             filt_out = is->out_video_filter;
1620             last_w = is->video_st->codec->width;
1621             last_h = is->video_st->codec->height;
1622         }
1623
1624         frame->pts = pts_int;
1625         ret = av_buffersrc_add_frame(filt_in, frame);
1626         if (ret < 0)
1627             goto the_end;
1628
1629         while (ret >= 0) {
1630             ret = av_buffersink_get_frame(filt_out, frame);
1631             if (ret < 0) {
1632                 ret = 0;
1633                 break;
1634             }
1635
1636             pts_int = frame->pts;
1637             tb      = filt_out->inputs[0]->time_base;
1638             if (av_cmp_q(tb, is->video_st->time_base)) {
1639                 av_unused int64_t pts1 = pts_int;
1640                 pts_int = av_rescale_q(pts_int, tb, is->video_st->time_base);
1641                 av_dlog(NULL, "video_thread(): "
1642                         "tb:%d/%d pts:%"PRId64" -> tb:%d/%d pts:%"PRId64"\n",
1643                         tb.num, tb.den, pts1,
1644                         is->video_st->time_base.num, is->video_st->time_base.den, pts_int);
1645             }
1646             pts = pts_int * av_q2d(is->video_st->time_base);
1647             ret = output_picture2(is, frame, pts, 0);
1648         }
1649 #else
1650         pts = pts_int * av_q2d(is->video_st->time_base);
1651         ret = output_picture2(is, frame, pts,  pkt.pos);
1652 #endif
1653
1654         if (ret < 0)
1655             goto the_end;
1656
1657
1658         if (step)
1659             if (cur_stream)
1660                 stream_pause(cur_stream);
1661     }
1662  the_end:
1663 #if CONFIG_AVFILTER
1664     av_freep(&vfilters);
1665     avfilter_graph_free(&graph);
1666 #endif
1667     av_free_packet(&pkt);
1668     av_frame_free(&frame);
1669     return 0;
1670 }
1671
1672 static int subtitle_thread(void *arg)
1673 {
1674     VideoState *is = arg;
1675     SubPicture *sp;
1676     AVPacket pkt1, *pkt = &pkt1;
1677     int got_subtitle;
1678     double pts;
1679     int i, j;
1680     int r, g, b, y, u, v, a;
1681
1682     for (;;) {
1683         while (is->paused && !is->subtitleq.abort_request) {
1684             SDL_Delay(10);
1685         }
1686         if (packet_queue_get(&is->subtitleq, pkt, 1) < 0)
1687             break;
1688
1689         if (pkt->data == flush_pkt.data) {
1690             avcodec_flush_buffers(is->subtitle_st->codec);
1691             continue;
1692         }
1693         SDL_LockMutex(is->subpq_mutex);
1694         while (is->subpq_size >= SUBPICTURE_QUEUE_SIZE &&
1695                !is->subtitleq.abort_request) {
1696             SDL_CondWait(is->subpq_cond, is->subpq_mutex);
1697         }
1698         SDL_UnlockMutex(is->subpq_mutex);
1699
1700         if (is->subtitleq.abort_request)
1701             return 0;
1702
1703         sp = &is->subpq[is->subpq_windex];
1704
1705        /* NOTE: ipts is the PTS of the _first_ picture beginning in
1706            this packet, if any */
1707         pts = 0;
1708         if (pkt->pts != AV_NOPTS_VALUE)
1709             pts = av_q2d(is->subtitle_st->time_base) * pkt->pts;
1710
1711         avcodec_decode_subtitle2(is->subtitle_st->codec, &sp->sub,
1712                                  &got_subtitle, pkt);
1713
1714         if (got_subtitle && sp->sub.format == 0) {
1715             sp->pts = pts;
1716
1717             for (i = 0; i < sp->sub.num_rects; i++)
1718             {
1719                 for (j = 0; j < sp->sub.rects[i]->nb_colors; j++)
1720                 {
1721                     RGBA_IN(r, g, b, a, (uint32_t*)sp->sub.rects[i]->pict.data[1] + j);
1722                     y = RGB_TO_Y_CCIR(r, g, b);
1723                     u = RGB_TO_U_CCIR(r, g, b, 0);
1724                     v = RGB_TO_V_CCIR(r, g, b, 0);
1725                     YUVA_OUT((uint32_t*)sp->sub.rects[i]->pict.data[1] + j, y, u, v, a);
1726                 }
1727             }
1728
1729             /* now we can update the picture count */
1730             if (++is->subpq_windex == SUBPICTURE_QUEUE_SIZE)
1731                 is->subpq_windex = 0;
1732             SDL_LockMutex(is->subpq_mutex);
1733             is->subpq_size++;
1734             SDL_UnlockMutex(is->subpq_mutex);
1735         }
1736         av_free_packet(pkt);
1737     }
1738     return 0;
1739 }
1740
1741 /* copy samples for viewing in editor window */
1742 static void update_sample_display(VideoState *is, short *samples, int samples_size)
1743 {
1744     int size, len;
1745
1746     size = samples_size / sizeof(short);
1747     while (size > 0) {
1748         len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
1749         if (len > size)
1750             len = size;
1751         memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
1752         samples += len;
1753         is->sample_array_index += len;
1754         if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
1755             is->sample_array_index = 0;
1756         size -= len;
1757     }
1758 }
1759
1760 /* return the new audio buffer size (samples can be added or deleted
1761    to get better sync if video or external master clock) */
1762 static int synchronize_audio(VideoState *is, short *samples,
1763                              int samples_size1, double pts)
1764 {
1765     int n, samples_size;
1766     double ref_clock;
1767
1768     n = is->sdl_channels * av_get_bytes_per_sample(is->sdl_sample_fmt);
1769     samples_size = samples_size1;
1770
1771     /* if not master, then we try to remove or add samples to correct the clock */
1772     if (((is->av_sync_type == AV_SYNC_VIDEO_MASTER && is->video_st) ||
1773          is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)) {
1774         double diff, avg_diff;
1775         int wanted_size, min_size, max_size, nb_samples;
1776
1777         ref_clock = get_master_clock(is);
1778         diff = get_audio_clock(is) - ref_clock;
1779
1780         if (diff < AV_NOSYNC_THRESHOLD) {
1781             is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
1782             if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
1783                 /* not enough measures to have a correct estimate */
1784                 is->audio_diff_avg_count++;
1785             } else {
1786                 /* estimate the A-V difference */
1787                 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
1788
1789                 if (fabs(avg_diff) >= is->audio_diff_threshold) {
1790                     wanted_size = samples_size + ((int)(diff * is->sdl_sample_rate) * n);
1791                     nb_samples = samples_size / n;
1792
1793                     min_size = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
1794                     max_size = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
1795                     if (wanted_size < min_size)
1796                         wanted_size = min_size;
1797                     else if (wanted_size > max_size)
1798                         wanted_size = max_size;
1799
1800                     /* add or remove samples to correction the synchro */
1801                     if (wanted_size < samples_size) {
1802                         /* remove samples */
1803                         samples_size = wanted_size;
1804                     } else if (wanted_size > samples_size) {
1805                         uint8_t *samples_end, *q;
1806                         int nb;
1807
1808                         /* add samples */
1809                         nb = (samples_size - wanted_size);
1810                         samples_end = (uint8_t *)samples + samples_size - n;
1811                         q = samples_end + n;
1812                         while (nb > 0) {
1813                             memcpy(q, samples_end, n);
1814                             q += n;
1815                             nb -= n;
1816                         }
1817                         samples_size = wanted_size;
1818                     }
1819                 }
1820                 av_dlog(NULL, "diff=%f adiff=%f sample_diff=%d apts=%0.3f vpts=%0.3f %f\n",
1821                         diff, avg_diff, samples_size - samples_size1,
1822                         is->audio_clock, is->video_clock, is->audio_diff_threshold);
1823             }
1824         } else {
1825             /* too big difference : may be initial PTS errors, so
1826                reset A-V filter */
1827             is->audio_diff_avg_count = 0;
1828             is->audio_diff_cum       = 0;
1829         }
1830     }
1831
1832     return samples_size;
1833 }
1834
1835 /* decode one audio frame and returns its uncompressed size */
1836 static int audio_decode_frame(VideoState *is, double *pts_ptr)
1837 {
1838     AVPacket *pkt_temp = &is->audio_pkt_temp;
1839     AVPacket *pkt = &is->audio_pkt;
1840     AVCodecContext *dec = is->audio_st->codec;
1841     int n, len1, data_size, got_frame;
1842     double pts;
1843     int new_packet = 0;
1844     int flush_complete = 0;
1845
1846     for (;;) {
1847         /* NOTE: the audio packet can contain several frames */
1848         while (pkt_temp->size > 0 || (!pkt_temp->data && new_packet)) {
1849             int resample_changed, audio_resample;
1850
1851             if (!is->frame) {
1852                 if (!(is->frame = av_frame_alloc()))
1853                     return AVERROR(ENOMEM);
1854             }
1855
1856             if (flush_complete)
1857                 break;
1858             new_packet = 0;
1859             len1 = avcodec_decode_audio4(dec, is->frame, &got_frame, pkt_temp);
1860             if (len1 < 0) {
1861                 /* if error, we skip the frame */
1862                 pkt_temp->size = 0;
1863                 break;
1864             }
1865
1866             pkt_temp->data += len1;
1867             pkt_temp->size -= len1;
1868
1869             if (!got_frame) {
1870                 /* stop sending empty packets if the decoder is finished */
1871                 if (!pkt_temp->data && dec->codec->capabilities & CODEC_CAP_DELAY)
1872                     flush_complete = 1;
1873                 continue;
1874             }
1875             data_size = av_samples_get_buffer_size(NULL, dec->channels,
1876                                                    is->frame->nb_samples,
1877                                                    is->frame->format, 1);
1878
1879             audio_resample = is->frame->format         != is->sdl_sample_fmt     ||
1880                              is->frame->channel_layout != is->sdl_channel_layout ||
1881                              is->frame->sample_rate    != is->sdl_sample_rate;
1882
1883             resample_changed = is->frame->format         != is->resample_sample_fmt     ||
1884                                is->frame->channel_layout != is->resample_channel_layout ||
1885                                is->frame->sample_rate    != is->resample_sample_rate;
1886
1887             if ((!is->avr && audio_resample) || resample_changed) {
1888                 int ret;
1889                 if (is->avr)
1890                     avresample_close(is->avr);
1891                 else if (audio_resample) {
1892                     is->avr = avresample_alloc_context();
1893                     if (!is->avr) {
1894                         fprintf(stderr, "error allocating AVAudioResampleContext\n");
1895                         break;
1896                     }
1897                 }
1898                 if (audio_resample) {
1899                     av_opt_set_int(is->avr, "in_channel_layout",  is->frame->channel_layout, 0);
1900                     av_opt_set_int(is->avr, "in_sample_fmt",      is->frame->format,         0);
1901                     av_opt_set_int(is->avr, "in_sample_rate",     is->frame->sample_rate,    0);
1902                     av_opt_set_int(is->avr, "out_channel_layout", is->sdl_channel_layout,    0);
1903                     av_opt_set_int(is->avr, "out_sample_fmt",     is->sdl_sample_fmt,        0);
1904                     av_opt_set_int(is->avr, "out_sample_rate",    is->sdl_sample_rate,       0);
1905
1906                     if ((ret = avresample_open(is->avr)) < 0) {
1907                         fprintf(stderr, "error initializing libavresample\n");
1908                         break;
1909                     }
1910                 }
1911                 is->resample_sample_fmt     = is->frame->format;
1912                 is->resample_channel_layout = is->frame->channel_layout;
1913                 is->resample_sample_rate    = is->frame->sample_rate;
1914             }
1915
1916             if (audio_resample) {
1917                 void *tmp_out;
1918                 int out_samples, out_size, out_linesize;
1919                 int osize      = av_get_bytes_per_sample(is->sdl_sample_fmt);
1920                 int nb_samples = is->frame->nb_samples;
1921
1922                 out_size = av_samples_get_buffer_size(&out_linesize,
1923                                                       is->sdl_channels,
1924                                                       nb_samples,
1925                                                       is->sdl_sample_fmt, 0);
1926                 tmp_out = av_realloc(is->audio_buf1, out_size);
1927                 if (!tmp_out)
1928                     return AVERROR(ENOMEM);
1929                 is->audio_buf1 = tmp_out;
1930
1931                 out_samples = avresample_convert(is->avr,
1932                                                  &is->audio_buf1,
1933                                                  out_linesize, nb_samples,
1934                                                  is->frame->data,
1935                                                  is->frame->linesize[0],
1936                                                  is->frame->nb_samples);
1937                 if (out_samples < 0) {
1938                     fprintf(stderr, "avresample_convert() failed\n");
1939                     break;
1940                 }
1941                 is->audio_buf = is->audio_buf1;
1942                 data_size = out_samples * osize * is->sdl_channels;
1943             } else {
1944                 is->audio_buf = is->frame->data[0];
1945             }
1946
1947             /* if no pts, then compute it */
1948             pts = is->audio_clock;
1949             *pts_ptr = pts;
1950             n = is->sdl_channels * av_get_bytes_per_sample(is->sdl_sample_fmt);
1951             is->audio_clock += (double)data_size /
1952                 (double)(n * is->sdl_sample_rate);
1953 #ifdef DEBUG
1954             {
1955                 static double last_clock;
1956                 printf("audio: delay=%0.3f clock=%0.3f pts=%0.3f\n",
1957                        is->audio_clock - last_clock,
1958                        is->audio_clock, pts);
1959                 last_clock = is->audio_clock;
1960             }
1961 #endif
1962             return data_size;
1963         }
1964
1965         /* free the current packet */
1966         if (pkt->data)
1967             av_free_packet(pkt);
1968         memset(pkt_temp, 0, sizeof(*pkt_temp));
1969
1970         if (is->paused || is->audioq.abort_request) {
1971             return -1;
1972         }
1973
1974         /* read next packet */
1975         if ((new_packet = packet_queue_get(&is->audioq, pkt, 1)) < 0)
1976             return -1;
1977
1978         if (pkt->data == flush_pkt.data) {
1979             avcodec_flush_buffers(dec);
1980             flush_complete = 0;
1981         }
1982
1983         *pkt_temp = *pkt;
1984
1985         /* if update the audio clock with the pts */
1986         if (pkt->pts != AV_NOPTS_VALUE) {
1987             is->audio_clock = av_q2d(is->audio_st->time_base)*pkt->pts;
1988         }
1989     }
1990 }
1991
1992 /* prepare a new audio buffer */
1993 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
1994 {
1995     VideoState *is = opaque;
1996     int audio_size, len1;
1997     double pts;
1998
1999     audio_callback_time = av_gettime_relative();
2000
2001     while (len > 0) {
2002         if (is->audio_buf_index >= is->audio_buf_size) {
2003            audio_size = audio_decode_frame(is, &pts);
2004            if (audio_size < 0) {
2005                 /* if error, just output silence */
2006                is->audio_buf      = is->silence_buf;
2007                is->audio_buf_size = sizeof(is->silence_buf);
2008            } else {
2009                if (is->show_audio)
2010                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2011                audio_size = synchronize_audio(is, (int16_t *)is->audio_buf, audio_size,
2012                                               pts);
2013                is->audio_buf_size = audio_size;
2014            }
2015            is->audio_buf_index = 0;
2016         }
2017         len1 = is->audio_buf_size - is->audio_buf_index;
2018         if (len1 > len)
2019             len1 = len;
2020         memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2021         len -= len1;
2022         stream += len1;
2023         is->audio_buf_index += len1;
2024     }
2025 }
2026
2027 /* open a given stream. Return 0 if OK */
2028 static int stream_component_open(VideoState *is, int stream_index)
2029 {
2030     AVFormatContext *ic = is->ic;
2031     AVCodecContext *avctx;
2032     AVCodec *codec;
2033     SDL_AudioSpec wanted_spec, spec;
2034     AVDictionary *opts;
2035     AVDictionaryEntry *t = NULL;
2036     int ret = 0;
2037
2038     if (stream_index < 0 || stream_index >= ic->nb_streams)
2039         return -1;
2040     avctx = ic->streams[stream_index]->codec;
2041
2042     opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], NULL);
2043
2044     codec = avcodec_find_decoder(avctx->codec_id);
2045     avctx->workaround_bugs   = workaround_bugs;
2046     avctx->idct_algo         = idct;
2047     avctx->skip_frame        = skip_frame;
2048     avctx->skip_idct         = skip_idct;
2049     avctx->skip_loop_filter  = skip_loop_filter;
2050     avctx->error_concealment = error_concealment;
2051
2052     if (fast)   avctx->flags2 |= CODEC_FLAG2_FAST;
2053
2054     if (!av_dict_get(opts, "threads", NULL, 0))
2055         av_dict_set(&opts, "threads", "auto", 0);
2056     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO)
2057         av_dict_set(&opts, "refcounted_frames", "1", 0);
2058     if (!codec ||
2059         (ret = avcodec_open2(avctx, codec, &opts)) < 0) {
2060         goto fail;
2061     }
2062     if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2063         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2064         ret =  AVERROR_OPTION_NOT_FOUND;
2065         goto fail;
2066     }
2067
2068     /* prepare audio output */
2069     if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
2070         is->sdl_sample_rate = avctx->sample_rate;
2071
2072         if (!avctx->channel_layout)
2073             avctx->channel_layout = av_get_default_channel_layout(avctx->channels);
2074         if (!avctx->channel_layout) {
2075             fprintf(stderr, "unable to guess channel layout\n");
2076             ret = AVERROR_INVALIDDATA;
2077             goto fail;
2078         }
2079         if (avctx->channels == 1)
2080             is->sdl_channel_layout = AV_CH_LAYOUT_MONO;
2081         else
2082             is->sdl_channel_layout = AV_CH_LAYOUT_STEREO;
2083         is->sdl_channels = av_get_channel_layout_nb_channels(is->sdl_channel_layout);
2084
2085         wanted_spec.format = AUDIO_S16SYS;
2086         wanted_spec.freq = is->sdl_sample_rate;
2087         wanted_spec.channels = is->sdl_channels;
2088         wanted_spec.silence = 0;
2089         wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
2090         wanted_spec.callback = sdl_audio_callback;
2091         wanted_spec.userdata = is;
2092         if (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
2093             fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError());
2094             ret = AVERROR_UNKNOWN;
2095             goto fail;
2096         }
2097         is->audio_hw_buf_size = spec.size;
2098         is->sdl_sample_fmt          = AV_SAMPLE_FMT_S16;
2099         is->resample_sample_fmt     = is->sdl_sample_fmt;
2100         is->resample_channel_layout = avctx->channel_layout;
2101         is->resample_sample_rate    = avctx->sample_rate;
2102     }
2103
2104     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
2105     switch (avctx->codec_type) {
2106     case AVMEDIA_TYPE_AUDIO:
2107         is->audio_stream = stream_index;
2108         is->audio_st = ic->streams[stream_index];
2109         is->audio_buf_size  = 0;
2110         is->audio_buf_index = 0;
2111
2112         /* init averaging filter */
2113         is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2114         is->audio_diff_avg_count = 0;
2115         /* since we do not have a precise anough audio fifo fullness,
2116            we correct audio sync only if larger than this threshold */
2117         is->audio_diff_threshold = 2.0 * SDL_AUDIO_BUFFER_SIZE / avctx->sample_rate;
2118
2119         memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
2120         packet_queue_init(&is->audioq);
2121         SDL_PauseAudio(0);
2122         break;
2123     case AVMEDIA_TYPE_VIDEO:
2124         is->video_stream = stream_index;
2125         is->video_st = ic->streams[stream_index];
2126
2127         packet_queue_init(&is->videoq);
2128         is->video_tid = SDL_CreateThread(video_thread, is);
2129         break;
2130     case AVMEDIA_TYPE_SUBTITLE:
2131         is->subtitle_stream = stream_index;
2132         is->subtitle_st = ic->streams[stream_index];
2133         packet_queue_init(&is->subtitleq);
2134
2135         is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
2136         break;
2137     default:
2138         break;
2139     }
2140
2141 fail:
2142     av_dict_free(&opts);
2143
2144     return ret;
2145 }
2146
2147 static void stream_component_close(VideoState *is, int stream_index)
2148 {
2149     AVFormatContext *ic = is->ic;
2150     AVCodecContext *avctx;
2151
2152     if (stream_index < 0 || stream_index >= ic->nb_streams)
2153         return;
2154     avctx = ic->streams[stream_index]->codec;
2155
2156     switch (avctx->codec_type) {
2157     case AVMEDIA_TYPE_AUDIO:
2158         packet_queue_abort(&is->audioq);
2159
2160         SDL_CloseAudio();
2161
2162         packet_queue_end(&is->audioq);
2163         av_free_packet(&is->audio_pkt);
2164         if (is->avr)
2165             avresample_free(&is->avr);
2166         av_freep(&is->audio_buf1);
2167         is->audio_buf = NULL;
2168         av_frame_free(&is->frame);
2169
2170         if (is->rdft) {
2171             av_rdft_end(is->rdft);
2172             av_freep(&is->rdft_data);
2173             is->rdft = NULL;
2174             is->rdft_bits = 0;
2175         }
2176         break;
2177     case AVMEDIA_TYPE_VIDEO:
2178         packet_queue_abort(&is->videoq);
2179
2180         /* note: we also signal this mutex to make sure we deblock the
2181            video thread in all cases */
2182         SDL_LockMutex(is->pictq_mutex);
2183         SDL_CondSignal(is->pictq_cond);
2184         SDL_UnlockMutex(is->pictq_mutex);
2185
2186         SDL_WaitThread(is->video_tid, NULL);
2187
2188         packet_queue_end(&is->videoq);
2189         break;
2190     case AVMEDIA_TYPE_SUBTITLE:
2191         packet_queue_abort(&is->subtitleq);
2192
2193         /* note: we also signal this mutex to make sure we deblock the
2194            video thread in all cases */
2195         SDL_LockMutex(is->subpq_mutex);
2196         is->subtitle_stream_changed = 1;
2197
2198         SDL_CondSignal(is->subpq_cond);
2199         SDL_UnlockMutex(is->subpq_mutex);
2200
2201         SDL_WaitThread(is->subtitle_tid, NULL);
2202
2203         packet_queue_end(&is->subtitleq);
2204         break;
2205     default:
2206         break;
2207     }
2208
2209     ic->streams[stream_index]->discard = AVDISCARD_ALL;
2210     avcodec_close(avctx);
2211     switch (avctx->codec_type) {
2212     case AVMEDIA_TYPE_AUDIO:
2213         is->audio_st = NULL;
2214         is->audio_stream = -1;
2215         break;
2216     case AVMEDIA_TYPE_VIDEO:
2217         is->video_st = NULL;
2218         is->video_stream = -1;
2219         break;
2220     case AVMEDIA_TYPE_SUBTITLE:
2221         is->subtitle_st = NULL;
2222         is->subtitle_stream = -1;
2223         break;
2224     default:
2225         break;
2226     }
2227 }
2228
2229 /* since we have only one decoding thread, we can use a global
2230    variable instead of a thread local variable */
2231 static VideoState *global_video_state;
2232
2233 static int decode_interrupt_cb(void *ctx)
2234 {
2235     return global_video_state && global_video_state->abort_request;
2236 }
2237
2238 /* this thread gets the stream from the disk or the network */
2239 static int decode_thread(void *arg)
2240 {
2241     VideoState *is = arg;
2242     AVFormatContext *ic = NULL;
2243     int err, i, ret;
2244     int st_index[AVMEDIA_TYPE_NB];
2245     AVPacket pkt1, *pkt = &pkt1;
2246     int eof = 0;
2247     int pkt_in_play_range = 0;
2248     AVDictionaryEntry *t;
2249     AVDictionary **opts;
2250     int orig_nb_streams;
2251
2252     memset(st_index, -1, sizeof(st_index));
2253     is->video_stream = -1;
2254     is->audio_stream = -1;
2255     is->subtitle_stream = -1;
2256
2257     global_video_state = is;
2258
2259     ic = avformat_alloc_context();
2260     if (!ic) {
2261         av_log(NULL, AV_LOG_FATAL, "Could not allocate context.\n");
2262         ret = AVERROR(ENOMEM);
2263         goto fail;
2264     }
2265     ic->interrupt_callback.callback = decode_interrupt_cb;
2266     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2267     if (err < 0) {
2268         print_error(is->filename, err);
2269         ret = -1;
2270         goto fail;
2271     }
2272     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2273         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2274         ret = AVERROR_OPTION_NOT_FOUND;
2275         goto fail;
2276     }
2277     is->ic = ic;
2278
2279     if (genpts)
2280         ic->flags |= AVFMT_FLAG_GENPTS;
2281
2282     opts = setup_find_stream_info_opts(ic, codec_opts);
2283     orig_nb_streams = ic->nb_streams;
2284
2285     err = avformat_find_stream_info(ic, opts);
2286
2287     for (i = 0; i < orig_nb_streams; i++)
2288         av_dict_free(&opts[i]);
2289     av_freep(&opts);
2290
2291     if (err < 0) {
2292         fprintf(stderr, "%s: could not find codec parameters\n", is->filename);
2293         ret = -1;
2294         goto fail;
2295     }
2296
2297     if (ic->pb)
2298         ic->pb->eof_reached = 0; // FIXME hack, avplay maybe should not use url_feof() to test for the end
2299
2300     if (seek_by_bytes < 0)
2301         seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT);
2302
2303     /* if seeking requested, we execute it */
2304     if (start_time != AV_NOPTS_VALUE) {
2305         int64_t timestamp;
2306
2307         timestamp = start_time;
2308         /* add the stream start time */
2309         if (ic->start_time != AV_NOPTS_VALUE)
2310             timestamp += ic->start_time;
2311         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
2312         if (ret < 0) {
2313             fprintf(stderr, "%s: could not seek to position %0.3f\n",
2314                     is->filename, (double)timestamp / AV_TIME_BASE);
2315         }
2316     }
2317
2318     for (i = 0; i < ic->nb_streams; i++)
2319         ic->streams[i]->discard = AVDISCARD_ALL;
2320     if (!video_disable)
2321         st_index[AVMEDIA_TYPE_VIDEO] =
2322             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
2323                                 wanted_stream[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
2324     if (!audio_disable)
2325         st_index[AVMEDIA_TYPE_AUDIO] =
2326             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
2327                                 wanted_stream[AVMEDIA_TYPE_AUDIO],
2328                                 st_index[AVMEDIA_TYPE_VIDEO],
2329                                 NULL, 0);
2330     if (!video_disable)
2331         st_index[AVMEDIA_TYPE_SUBTITLE] =
2332             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
2333                                 wanted_stream[AVMEDIA_TYPE_SUBTITLE],
2334                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
2335                                  st_index[AVMEDIA_TYPE_AUDIO] :
2336                                  st_index[AVMEDIA_TYPE_VIDEO]),
2337                                 NULL, 0);
2338     if (show_status) {
2339         av_dump_format(ic, 0, is->filename, 0);
2340     }
2341
2342     /* open the streams */
2343     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
2344         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2345     }
2346
2347     ret = -1;
2348     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2349         ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2350     }
2351     is->refresh_tid = SDL_CreateThread(refresh_thread, is);
2352     if (ret < 0) {
2353         if (!display_disable)
2354             is->show_audio = 2;
2355     }
2356
2357     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
2358         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2359     }
2360
2361     if (is->video_stream < 0 && is->audio_stream < 0) {
2362         fprintf(stderr, "%s: could not open codecs\n", is->filename);
2363         ret = -1;
2364         goto fail;
2365     }
2366
2367     for (;;) {
2368         if (is->abort_request)
2369             break;
2370         if (is->paused != is->last_paused) {
2371             is->last_paused = is->paused;
2372             if (is->paused)
2373                 is->read_pause_return = av_read_pause(ic);
2374             else
2375                 av_read_play(ic);
2376         }
2377 #if CONFIG_RTSP_DEMUXER
2378         if (is->paused && !strcmp(ic->iformat->name, "rtsp")) {
2379             /* wait 10 ms to avoid trying to get another packet */
2380             /* XXX: horrible */
2381             SDL_Delay(10);
2382             continue;
2383         }
2384 #endif
2385         if (is->seek_req) {
2386             int64_t seek_target = is->seek_pos;
2387             int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2388             int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2389 // FIXME the +-2 is due to rounding being not done in the correct direction in generation
2390 //      of the seek_pos/seek_rel variables
2391
2392             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2393             if (ret < 0) {
2394                 fprintf(stderr, "%s: error while seeking\n", is->ic->filename);
2395             } else {
2396                 if (is->audio_stream >= 0) {
2397                     packet_queue_flush(&is->audioq);
2398                     packet_queue_put(&is->audioq, &flush_pkt);
2399                 }
2400                 if (is->subtitle_stream >= 0) {
2401                     packet_queue_flush(&is->subtitleq);
2402                     packet_queue_put(&is->subtitleq, &flush_pkt);
2403                 }
2404                 if (is->video_stream >= 0) {
2405                     packet_queue_flush(&is->videoq);
2406                     packet_queue_put(&is->videoq, &flush_pkt);
2407                 }
2408             }
2409             is->seek_req = 0;
2410             eof = 0;
2411         }
2412
2413         /* if the queue are full, no need to read more */
2414         if (!infinite_buffer &&
2415               (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2416             || (   (is->audioq   .size  > MIN_AUDIOQ_SIZE || is->audio_stream < 0)
2417                 && (is->videoq   .nb_packets > MIN_FRAMES || is->video_stream < 0)
2418                 && (is->subtitleq.nb_packets > MIN_FRAMES || is->subtitle_stream < 0)))) {
2419             /* wait 10 ms */
2420             SDL_Delay(10);
2421             continue;
2422         }
2423         if (eof) {
2424             if (is->video_stream >= 0) {
2425                 av_init_packet(pkt);
2426                 pkt->data = NULL;
2427                 pkt->size = 0;
2428                 pkt->stream_index = is->video_stream;
2429                 packet_queue_put(&is->videoq, pkt);
2430             }
2431             if (is->audio_stream >= 0 &&
2432                 is->audio_st->codec->codec->capabilities & CODEC_CAP_DELAY) {
2433                 av_init_packet(pkt);
2434                 pkt->data = NULL;
2435                 pkt->size = 0;
2436                 pkt->stream_index = is->audio_stream;
2437                 packet_queue_put(&is->audioq, pkt);
2438             }
2439             SDL_Delay(10);
2440             if (is->audioq.size + is->videoq.size + is->subtitleq.size == 0) {
2441                 if (loop != 1 && (!loop || --loop)) {
2442                     stream_seek(cur_stream, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
2443                 } else if (!noautoexit) {
2444                     ret = AVERROR_EOF;
2445                     goto fail;
2446                 }
2447             }
2448             continue;
2449         }
2450         ret = av_read_frame(ic, pkt);
2451         if (ret < 0) {
2452             if (ret == AVERROR_EOF || (ic->pb && ic->pb->eof_reached))
2453                 eof = 1;
2454             if (ic->pb && ic->pb->error)
2455                 break;
2456             SDL_Delay(100); /* wait for user event */
2457             continue;
2458         }
2459         /* check if packet is in play range specified by user, then queue, otherwise discard */
2460         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
2461                 (pkt->pts - ic->streams[pkt->stream_index]->start_time) *
2462                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
2463                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
2464                 <= ((double)duration / 1000000);
2465         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
2466             packet_queue_put(&is->audioq, pkt);
2467         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range) {
2468             packet_queue_put(&is->videoq, pkt);
2469         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
2470             packet_queue_put(&is->subtitleq, pkt);
2471         } else {
2472             av_free_packet(pkt);
2473         }
2474     }
2475     /* wait until the end */
2476     while (!is->abort_request) {
2477         SDL_Delay(100);
2478     }
2479
2480     ret = 0;
2481  fail:
2482     /* disable interrupting */
2483     global_video_state = NULL;
2484
2485     /* close each stream */
2486     if (is->audio_stream >= 0)
2487         stream_component_close(is, is->audio_stream);
2488     if (is->video_stream >= 0)
2489         stream_component_close(is, is->video_stream);
2490     if (is->subtitle_stream >= 0)
2491         stream_component_close(is, is->subtitle_stream);
2492     if (is->ic) {
2493         avformat_close_input(&is->ic);
2494     }
2495
2496     if (ret != 0) {
2497         SDL_Event event;
2498
2499         event.type = FF_QUIT_EVENT;
2500         event.user.data1 = is;
2501         SDL_PushEvent(&event);
2502     }
2503     return 0;
2504 }
2505
2506 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
2507 {
2508     VideoState *is;
2509
2510     is = av_mallocz(sizeof(VideoState));
2511     if (!is)
2512         return NULL;
2513     av_strlcpy(is->filename, filename, sizeof(is->filename));
2514     is->iformat = iformat;
2515     is->ytop    = 0;
2516     is->xleft   = 0;
2517
2518     /* start video display */
2519     is->pictq_mutex = SDL_CreateMutex();
2520     is->pictq_cond  = SDL_CreateCond();
2521
2522     is->subpq_mutex = SDL_CreateMutex();
2523     is->subpq_cond  = SDL_CreateCond();
2524
2525     is->av_sync_type = av_sync_type;
2526     is->parse_tid    = SDL_CreateThread(decode_thread, is);
2527     if (!is->parse_tid) {
2528         av_free(is);
2529         return NULL;
2530     }
2531     return is;
2532 }
2533
2534 static void stream_cycle_channel(VideoState *is, int codec_type)
2535 {
2536     AVFormatContext *ic = is->ic;
2537     int start_index, stream_index;
2538     AVStream *st;
2539
2540     if (codec_type == AVMEDIA_TYPE_VIDEO)
2541         start_index = is->video_stream;
2542     else if (codec_type == AVMEDIA_TYPE_AUDIO)
2543         start_index = is->audio_stream;
2544     else
2545         start_index = is->subtitle_stream;
2546     if (start_index < (codec_type == AVMEDIA_TYPE_SUBTITLE ? -1 : 0))
2547         return;
2548     stream_index = start_index;
2549     for (;;) {
2550         if (++stream_index >= is->ic->nb_streams)
2551         {
2552             if (codec_type == AVMEDIA_TYPE_SUBTITLE)
2553             {
2554                 stream_index = -1;
2555                 goto the_end;
2556             } else
2557                 stream_index = 0;
2558         }
2559         if (stream_index == start_index)
2560             return;
2561         st = ic->streams[stream_index];
2562         if (st->codec->codec_type == codec_type) {
2563             /* check that parameters are OK */
2564             switch (codec_type) {
2565             case AVMEDIA_TYPE_AUDIO:
2566                 if (st->codec->sample_rate != 0 &&
2567                     st->codec->channels != 0)
2568                     goto the_end;
2569                 break;
2570             case AVMEDIA_TYPE_VIDEO:
2571             case AVMEDIA_TYPE_SUBTITLE:
2572                 goto the_end;
2573             default:
2574                 break;
2575             }
2576         }
2577     }
2578  the_end:
2579     stream_component_close(is, start_index);
2580     stream_component_open(is, stream_index);
2581 }
2582
2583
2584 static void toggle_full_screen(void)
2585 {
2586 #if defined(__APPLE__) && SDL_VERSION_ATLEAST(1, 2, 14)
2587     /* OS X needs to empty the picture_queue */
2588     int i;
2589     for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++)
2590         cur_stream->pictq[i].reallocate = 1;
2591 #endif
2592     is_full_screen = !is_full_screen;
2593     video_open(cur_stream);
2594 }
2595
2596 static void toggle_pause(void)
2597 {
2598     if (cur_stream)
2599         stream_pause(cur_stream);
2600     step = 0;
2601 }
2602
2603 static void step_to_next_frame(void)
2604 {
2605     if (cur_stream) {
2606         /* if the stream is paused unpause it, then step */
2607         if (cur_stream->paused)
2608             stream_pause(cur_stream);
2609     }
2610     step = 1;
2611 }
2612
2613 static void toggle_audio_display(void)
2614 {
2615     if (cur_stream) {
2616         int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
2617         cur_stream->show_audio = (cur_stream->show_audio + 1) % 3;
2618         fill_rectangle(screen,
2619                        cur_stream->xleft, cur_stream->ytop, cur_stream->width, cur_stream->height,
2620                        bgcolor);
2621         SDL_UpdateRect(screen, cur_stream->xleft, cur_stream->ytop, cur_stream->width, cur_stream->height);
2622     }
2623 }
2624
2625 static void seek_chapter(VideoState *is, int incr)
2626 {
2627     int64_t pos = get_master_clock(is) * AV_TIME_BASE;
2628     int i;
2629
2630     if (!is->ic->nb_chapters)
2631         return;
2632
2633     /* find the current chapter */
2634     for (i = 0; i < is->ic->nb_chapters; i++) {
2635         AVChapter *ch = is->ic->chapters[i];
2636         if (av_compare_ts(pos, AV_TIME_BASE_Q, ch->start, ch->time_base) < 0) {
2637             i--;
2638             break;
2639         }
2640     }
2641
2642     i += incr;
2643     i = FFMAX(i, 0);
2644     if (i >= is->ic->nb_chapters)
2645         return;
2646
2647     av_log(NULL, AV_LOG_VERBOSE, "Seeking to chapter %d.\n", i);
2648     stream_seek(is, av_rescale_q(is->ic->chapters[i]->start, is->ic->chapters[i]->time_base,
2649                                  AV_TIME_BASE_Q), 0, 0);
2650 }
2651
2652 /* handle an event sent by the GUI */
2653 static void event_loop(void)
2654 {
2655     SDL_Event event;
2656     double incr, pos, frac;
2657
2658     for (;;) {
2659         double x;
2660         SDL_WaitEvent(&event);
2661         switch (event.type) {
2662         case SDL_KEYDOWN:
2663             if (exit_on_keydown) {
2664                 do_exit();
2665                 break;
2666             }
2667             switch (event.key.keysym.sym) {
2668             case SDLK_ESCAPE:
2669             case SDLK_q:
2670                 do_exit();
2671                 break;
2672             case SDLK_f:
2673                 toggle_full_screen();
2674                 break;
2675             case SDLK_p:
2676             case SDLK_SPACE:
2677                 toggle_pause();
2678                 break;
2679             case SDLK_s: // S: Step to next frame
2680                 step_to_next_frame();
2681                 break;
2682             case SDLK_a:
2683                 if (cur_stream)
2684                     stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
2685                 break;
2686             case SDLK_v:
2687                 if (cur_stream)
2688                     stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
2689                 break;
2690             case SDLK_t:
2691                 if (cur_stream)
2692                     stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
2693                 break;
2694             case SDLK_w:
2695                 toggle_audio_display();
2696                 break;
2697             case SDLK_PAGEUP:
2698                 seek_chapter(cur_stream, 1);
2699                 break;
2700             case SDLK_PAGEDOWN:
2701                 seek_chapter(cur_stream, -1);
2702                 break;
2703             case SDLK_LEFT:
2704                 incr = -10.0;
2705                 goto do_seek;
2706             case SDLK_RIGHT:
2707                 incr = 10.0;
2708                 goto do_seek;
2709             case SDLK_UP:
2710                 incr = 60.0;
2711                 goto do_seek;
2712             case SDLK_DOWN:
2713                 incr = -60.0;
2714             do_seek:
2715                 if (cur_stream) {
2716                     if (seek_by_bytes) {
2717                         if (cur_stream->video_stream >= 0 && cur_stream->video_current_pos >= 0) {
2718                             pos = cur_stream->video_current_pos;
2719                         } else if (cur_stream->audio_stream >= 0 && cur_stream->audio_pkt.pos >= 0) {
2720                             pos = cur_stream->audio_pkt.pos;
2721                         } else
2722                             pos = avio_tell(cur_stream->ic->pb);
2723                         if (cur_stream->ic->bit_rate)
2724                             incr *= cur_stream->ic->bit_rate / 8.0;
2725                         else
2726                             incr *= 180000.0;
2727                         pos += incr;
2728                         stream_seek(cur_stream, pos, incr, 1);
2729                     } else {
2730                         pos = get_master_clock(cur_stream);
2731                         pos += incr;
2732                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
2733                     }
2734                 }
2735                 break;
2736             default:
2737                 break;
2738             }
2739             break;
2740         case SDL_MOUSEBUTTONDOWN:
2741             if (exit_on_mousedown) {
2742                 do_exit();
2743                 break;
2744             }
2745         case SDL_MOUSEMOTION:
2746             if (event.type == SDL_MOUSEBUTTONDOWN) {
2747                 x = event.button.x;
2748             } else {
2749                 if (event.motion.state != SDL_PRESSED)
2750                     break;
2751                 x = event.motion.x;
2752             }
2753             if (cur_stream) {
2754                 if (seek_by_bytes || cur_stream->ic->duration <= 0) {
2755                     uint64_t size =  avio_size(cur_stream->ic->pb);
2756                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
2757                 } else {
2758                     int64_t ts;
2759                     int ns, hh, mm, ss;
2760                     int tns, thh, tmm, tss;
2761                     tns  = cur_stream->ic->duration / 1000000LL;
2762                     thh  = tns / 3600;
2763                     tmm  = (tns % 3600) / 60;
2764                     tss  = (tns % 60);
2765                     frac = x / cur_stream->width;
2766                     ns   = frac * tns;
2767                     hh   = ns / 3600;
2768                     mm   = (ns % 3600) / 60;
2769                     ss   = (ns % 60);
2770                     fprintf(stderr, "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
2771                             hh, mm, ss, thh, tmm, tss);
2772                     ts = frac * cur_stream->ic->duration;
2773                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
2774                         ts += cur_stream->ic->start_time;
2775                     stream_seek(cur_stream, ts, 0, 0);
2776                 }
2777             }
2778             break;
2779         case SDL_VIDEORESIZE:
2780             if (cur_stream) {
2781                 screen = SDL_SetVideoMode(event.resize.w, event.resize.h, 0,
2782                                           SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
2783                 screen_width  = cur_stream->width  = event.resize.w;
2784                 screen_height = cur_stream->height = event.resize.h;
2785             }
2786             break;
2787         case SDL_QUIT:
2788         case FF_QUIT_EVENT:
2789             do_exit();
2790             break;
2791         case FF_ALLOC_EVENT:
2792             video_open(event.user.data1);
2793             alloc_picture(event.user.data1);
2794             break;
2795         case FF_REFRESH_EVENT:
2796             video_refresh_timer(event.user.data1);
2797             cur_stream->refresh = 0;
2798             break;
2799         default:
2800             break;
2801         }
2802     }
2803 }
2804
2805 static int opt_frame_size(void *optctx, const char *opt, const char *arg)
2806 {
2807     av_log(NULL, AV_LOG_ERROR,
2808            "Option '%s' has been removed, use private format options instead\n", opt);
2809     return AVERROR(EINVAL);
2810 }
2811
2812 static int opt_width(void *optctx, const char *opt, const char *arg)
2813 {
2814     screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
2815     return 0;
2816 }
2817
2818 static int opt_height(void *optctx, const char *opt, const char *arg)
2819 {
2820     screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
2821     return 0;
2822 }
2823
2824 static int opt_format(void *optctx, const char *opt, const char *arg)
2825 {
2826     file_iformat = av_find_input_format(arg);
2827     if (!file_iformat) {
2828         fprintf(stderr, "Unknown input format: %s\n", arg);
2829         return AVERROR(EINVAL);
2830     }
2831     return 0;
2832 }
2833
2834 static int opt_frame_pix_fmt(void *optctx, const char *opt, const char *arg)
2835 {
2836     av_log(NULL, AV_LOG_ERROR,
2837            "Option '%s' has been removed, use private format options instead\n", opt);
2838     return AVERROR(EINVAL);
2839 }
2840
2841 static int opt_sync(void *optctx, const char *opt, const char *arg)
2842 {
2843     if (!strcmp(arg, "audio"))
2844         av_sync_type = AV_SYNC_AUDIO_MASTER;
2845     else if (!strcmp(arg, "video"))
2846         av_sync_type = AV_SYNC_VIDEO_MASTER;
2847     else if (!strcmp(arg, "ext"))
2848         av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
2849     else {
2850         fprintf(stderr, "Unknown value for %s: %s\n", opt, arg);
2851         exit(1);
2852     }
2853     return 0;
2854 }
2855
2856 static int opt_seek(void *optctx, const char *opt, const char *arg)
2857 {
2858     start_time = parse_time_or_die(opt, arg, 1);
2859     return 0;
2860 }
2861
2862 static int opt_duration(void *optctx, const char *opt, const char *arg)
2863 {
2864     duration = parse_time_or_die(opt, arg, 1);
2865     return 0;
2866 }
2867
2868 static const OptionDef options[] = {
2869 #include "cmdutils_common_opts.h"
2870     { "x", HAS_ARG, { .func_arg = opt_width }, "force displayed width", "width" },
2871     { "y", HAS_ARG, { .func_arg = opt_height }, "force displayed height", "height" },
2872     { "s", HAS_ARG | OPT_VIDEO, { .func_arg = opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
2873     { "fs", OPT_BOOL, { &is_full_screen }, "force full screen" },
2874     { "an", OPT_BOOL, { &audio_disable }, "disable audio" },
2875     { "vn", OPT_BOOL, { &video_disable }, "disable video" },
2876     { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_number" },
2877     { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_number" },
2878     { "sst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_number" },
2879     { "ss", HAS_ARG, { .func_arg = opt_seek }, "seek to a given position in seconds", "pos" },
2880     { "t", HAS_ARG, { .func_arg = opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
2881     { "bytes", OPT_INT | HAS_ARG, { &seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
2882     { "nodisp", OPT_BOOL, { &display_disable }, "disable graphical display" },
2883     { "f", HAS_ARG, { .func_arg = opt_format }, "force format", "fmt" },
2884     { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_frame_pix_fmt }, "set pixel format", "format" },
2885     { "stats", OPT_BOOL | OPT_EXPERT, { &show_status }, "show status", "" },
2886     { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, { &workaround_bugs }, "workaround bugs", "" },
2887     { "fast", OPT_BOOL | OPT_EXPERT, { &fast }, "non spec compliant optimizations", "" },
2888     { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
2889     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
2890     { "skiploop", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_loop_filter }, "", "" },
2891     { "skipframe", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_frame }, "", "" },
2892     { "skipidct", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_idct }, "", "" },
2893     { "idct", OPT_INT | HAS_ARG | OPT_EXPERT, { &idct }, "set idct algo",  "algo" },
2894     { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, { &error_concealment }, "set error concealment options",  "bit_mask" },
2895     { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
2896     { "noautoexit", OPT_BOOL | OPT_EXPERT, { &noautoexit }, "Do not exit at the end of playback", "" },
2897     { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { &exit_on_keydown }, "exit on key down", "" },
2898     { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { &exit_on_mousedown }, "exit on mouse down", "" },
2899     { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { &loop }, "set number of times the playback shall be looped", "loop count" },
2900     { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
2901     { "infbuf", OPT_BOOL | OPT_EXPERT, { &infinite_buffer }, "don't limit the input buffer size (useful with realtime streams)", "" },
2902     { "window_title", OPT_STRING | HAS_ARG, { &window_title }, "set window title", "window title" },
2903 #if CONFIG_AVFILTER
2904     { "vf", OPT_STRING | HAS_ARG, { &vfilters }, "video filters", "filter list" },
2905 #endif
2906     { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { &rdftspeed }, "rdft speed", "msecs" },
2907     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { opt_default }, "generic catch all option", "" },
2908     { "i", 0, { NULL }, "avconv compatibility dummy option", ""},
2909     { NULL, },
2910 };
2911
2912 static void show_usage(void)
2913 {
2914     printf("Simple media player\n");
2915     printf("usage: %s [options] input_file\n", program_name);
2916     printf("\n");
2917 }
2918
2919 void show_help_default(const char *opt, const char *arg)
2920 {
2921     av_log_set_callback(log_callback_help);
2922     show_usage();
2923     show_help_options(options, "Main options:", 0, OPT_EXPERT, 0);
2924     show_help_options(options, "Advanced options:", OPT_EXPERT, 0, 0);
2925     printf("\n");
2926     show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
2927     show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
2928 #if !CONFIG_AVFILTER
2929     show_help_children(sws_get_class(), AV_OPT_FLAG_ENCODING_PARAM);
2930 #endif
2931     printf("\nWhile playing:\n"
2932            "q, ESC              quit\n"
2933            "f                   toggle full screen\n"
2934            "p, SPC              pause\n"
2935            "a                   cycle audio channel\n"
2936            "v                   cycle video channel\n"
2937            "t                   cycle subtitle channel\n"
2938            "w                   show audio waves\n"
2939            "s                   activate frame-step mode\n"
2940            "left/right          seek backward/forward 10 seconds\n"
2941            "down/up             seek backward/forward 1 minute\n"
2942            "mouse click         seek to percentage in file corresponding to fraction of width\n"
2943            );
2944 }
2945
2946 static void opt_input_file(void *optctx, const char *filename)
2947 {
2948     if (input_filename) {
2949         fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
2950                 filename, input_filename);
2951         exit(1);
2952     }
2953     if (!strcmp(filename, "-"))
2954         filename = "pipe:";
2955     input_filename = filename;
2956 }
2957
2958 /* Called from the main */
2959 int main(int argc, char **argv)
2960 {
2961     int flags;
2962
2963     av_log_set_flags(AV_LOG_SKIP_REPEATED);
2964     parse_loglevel(argc, argv, options);
2965
2966     /* register all codecs, demux and protocols */
2967     avcodec_register_all();
2968 #if CONFIG_AVDEVICE
2969     avdevice_register_all();
2970 #endif
2971 #if CONFIG_AVFILTER
2972     avfilter_register_all();
2973 #endif
2974     av_register_all();
2975     avformat_network_init();
2976
2977     init_opts();
2978
2979     show_banner();
2980
2981     parse_options(NULL, argc, argv, options, opt_input_file);
2982
2983     if (!input_filename) {
2984         show_usage();
2985         fprintf(stderr, "An input file must be specified\n");
2986         fprintf(stderr, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
2987         exit(1);
2988     }
2989
2990     if (display_disable) {
2991         video_disable = 1;
2992     }
2993     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
2994 #if !defined(__MINGW32__) && !defined(__APPLE__)
2995     flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */
2996 #endif
2997     if (SDL_Init (flags)) {
2998         fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError());
2999         exit(1);
3000     }
3001
3002     if (!display_disable) {
3003         const SDL_VideoInfo *vi = SDL_GetVideoInfo();
3004         fs_screen_width = vi->current_w;
3005         fs_screen_height = vi->current_h;
3006     }
3007
3008     SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
3009     SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
3010     SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
3011
3012     av_init_packet(&flush_pkt);
3013     flush_pkt.data = (uint8_t *)&flush_pkt;
3014
3015     cur_stream = stream_open(input_filename, file_iformat);
3016
3017     event_loop();
3018
3019     /* never returns */
3020
3021     return 0;
3022 }