git.sesse.net Git - ffmpeg/blob - 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() 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) 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 autoexit;
 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() - 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() / 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();
 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() / 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() / 1000000.0;
1028         }
1029         is->video_current_pts_drift = is->video_current_pts - av_gettime() / 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() / 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();
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 == NULL) {
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() / 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     for (;;) {
1591 #if CONFIG_AVFILTER
1592         AVRational tb;
1593 #endif
1594         while (is->paused && !is->videoq.abort_request)
1595             SDL_Delay(10);
1596
1597         av_free_packet(&pkt);
1598
1599         ret = get_video_frame(is, frame, &pts_int, &pkt);
1600         if (ret < 0)
1601             goto the_end;
1602
1603         if (!ret)
1604             continue;
1605
1606 #if CONFIG_AVFILTER
1607         if (   last_w != is->video_st->codec->width
1608             || last_h != is->video_st->codec->height) {
1609             av_dlog(NULL, "Changing size %dx%d -> %dx%d\n", last_w, last_h,
1610                     is->video_st->codec->width, is->video_st->codec->height);
1611             avfilter_graph_free(&graph);
1612             graph = avfilter_graph_alloc();
1613             if ((ret = configure_video_filters(graph, is, vfilters)) < 0)
1614                 goto the_end;
1615             filt_in  = is->in_video_filter;
1616             filt_out = is->out_video_filter;
1617             last_w = is->video_st->codec->width;
1618             last_h = is->video_st->codec->height;
1619         }
1620
1621         frame->pts = pts_int;
1622         ret = av_buffersrc_add_frame(filt_in, frame);
1623         if (ret < 0)
1624             goto the_end;
1625
1626         while (ret >= 0) {
1627             ret = av_buffersink_get_frame(filt_out, frame);
1628             if (ret < 0) {
1629                 ret = 0;
1630                 break;
1631             }
1632
1633             pts_int = frame->pts;
1634             tb      = filt_out->inputs[0]->time_base;
1635             if (av_cmp_q(tb, is->video_st->time_base)) {
1636                 av_unused int64_t pts1 = pts_int;
1637                 pts_int = av_rescale_q(pts_int, tb, is->video_st->time_base);
1638                 av_dlog(NULL, "video_thread(): "
1639                         "tb:%d/%d pts:%"PRId64" -> tb:%d/%d pts:%"PRId64"\n",
1640                         tb.num, tb.den, pts1,
1641                         is->video_st->time_base.num, is->video_st->time_base.den, pts_int);
1642             }
1643             pts = pts_int * av_q2d(is->video_st->time_base);
1644             ret = output_picture2(is, frame, pts, 0);
1645         }
1646 #else
1647         pts = pts_int * av_q2d(is->video_st->time_base);
1648         ret = output_picture2(is, frame, pts,  pkt.pos);
1649 #endif
1650
1651         if (ret < 0)
1652             goto the_end;
1653
1654
1655         if (step)
1656             if (cur_stream)
1657                 stream_pause(cur_stream);
1658     }
1659  the_end:
1660 #if CONFIG_AVFILTER
1661     av_freep(&vfilters);
1662     avfilter_graph_free(&graph);
1663 #endif
1664     av_free_packet(&pkt);
1665     av_frame_free(&frame);
1666     return 0;
1667 }
1668
1669 static int subtitle_thread(void *arg)
1670 {
1671     VideoState *is = arg;
1672     SubPicture *sp;
1673     AVPacket pkt1, *pkt = &pkt1;
1674     int got_subtitle;
1675     double pts;
1676     int i, j;
1677     int r, g, b, y, u, v, a;
1678
1679     for (;;) {
1680         while (is->paused && !is->subtitleq.abort_request) {
1681             SDL_Delay(10);
1682         }
1683         if (packet_queue_get(&is->subtitleq, pkt, 1) < 0)
1684             break;
1685
1686         if (pkt->data == flush_pkt.data) {
1687             avcodec_flush_buffers(is->subtitle_st->codec);
1688             continue;
1689         }
1690         SDL_LockMutex(is->subpq_mutex);
1691         while (is->subpq_size >= SUBPICTURE_QUEUE_SIZE &&
1692                !is->subtitleq.abort_request) {
1693             SDL_CondWait(is->subpq_cond, is->subpq_mutex);
1694         }
1695         SDL_UnlockMutex(is->subpq_mutex);
1696
1697         if (is->subtitleq.abort_request)
1698             return 0;
1699
1700         sp = &is->subpq[is->subpq_windex];
1701
1702        /* NOTE: ipts is the PTS of the _first_ picture beginning in
1703            this packet, if any */
1704         pts = 0;
1705         if (pkt->pts != AV_NOPTS_VALUE)
1706             pts = av_q2d(is->subtitle_st->time_base) * pkt->pts;
1707
1708         avcodec_decode_subtitle2(is->subtitle_st->codec, &sp->sub,
1709                                  &got_subtitle, pkt);
1710
1711         if (got_subtitle && sp->sub.format == 0) {
1712             sp->pts = pts;
1713
1714             for (i = 0; i < sp->sub.num_rects; i++)
1715             {
1716                 for (j = 0; j < sp->sub.rects[i]->nb_colors; j++)
1717                 {
1718                     RGBA_IN(r, g, b, a, (uint32_t*)sp->sub.rects[i]->pict.data[1] + j);
1719                     y = RGB_TO_Y_CCIR(r, g, b);
1720                     u = RGB_TO_U_CCIR(r, g, b, 0);
1721                     v = RGB_TO_V_CCIR(r, g, b, 0);
1722                     YUVA_OUT((uint32_t*)sp->sub.rects[i]->pict.data[1] + j, y, u, v, a);
1723                 }
1724             }
1725
1726             /* now we can update the picture count */
1727             if (++is->subpq_windex == SUBPICTURE_QUEUE_SIZE)
1728                 is->subpq_windex = 0;
1729             SDL_LockMutex(is->subpq_mutex);
1730             is->subpq_size++;
1731             SDL_UnlockMutex(is->subpq_mutex);
1732         }
1733         av_free_packet(pkt);
1734     }
1735     return 0;
1736 }
1737
1738 /* copy samples for viewing in editor window */
1739 static void update_sample_display(VideoState *is, short *samples, int samples_size)
1740 {
1741     int size, len;
1742
1743     size = samples_size / sizeof(short);
1744     while (size > 0) {
1745         len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
1746         if (len > size)
1747             len = size;
1748         memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
1749         samples += len;
1750         is->sample_array_index += len;
1751         if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
1752             is->sample_array_index = 0;
1753         size -= len;
1754     }
1755 }
1756
1757 /* return the new audio buffer size (samples can be added or deleted
1758    to get better sync if video or external master clock) */
1759 static int synchronize_audio(VideoState *is, short *samples,
1760                              int samples_size1, double pts)
1761 {
1762     int n, samples_size;
1763     double ref_clock;
1764
1765     n = is->sdl_channels * av_get_bytes_per_sample(is->sdl_sample_fmt);
1766     samples_size = samples_size1;
1767
1768     /* if not master, then we try to remove or add samples to correct the clock */
1769     if (((is->av_sync_type == AV_SYNC_VIDEO_MASTER && is->video_st) ||
1770          is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)) {
1771         double diff, avg_diff;
1772         int wanted_size, min_size, max_size, nb_samples;
1773
1774         ref_clock = get_master_clock(is);
1775         diff = get_audio_clock(is) - ref_clock;
1776
1777         if (diff < AV_NOSYNC_THRESHOLD) {
1778             is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
1779             if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
1780                 /* not enough measures to have a correct estimate */
1781                 is->audio_diff_avg_count++;
1782             } else {
1783                 /* estimate the A-V difference */
1784                 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
1785
1786                 if (fabs(avg_diff) >= is->audio_diff_threshold) {
1787                     wanted_size = samples_size + ((int)(diff * is->sdl_sample_rate) * n);
1788                     nb_samples = samples_size / n;
1789
1790                     min_size = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
1791                     max_size = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
1792                     if (wanted_size < min_size)
1793                         wanted_size = min_size;
1794                     else if (wanted_size > max_size)
1795                         wanted_size = max_size;
1796
1797                     /* add or remove samples to correction the synchro */
1798                     if (wanted_size < samples_size) {
1799                         /* remove samples */
1800                         samples_size = wanted_size;
1801                     } else if (wanted_size > samples_size) {
1802                         uint8_t *samples_end, *q;
1803                         int nb;
1804
1805                         /* add samples */
1806                         nb = (samples_size - wanted_size);
1807                         samples_end = (uint8_t *)samples + samples_size - n;
1808                         q = samples_end + n;
1809                         while (nb > 0) {
1810                             memcpy(q, samples_end, n);
1811                             q += n;
1812                             nb -= n;
1813                         }
1814                         samples_size = wanted_size;
1815                     }
1816                 }
1817                 av_dlog(NULL, "diff=%f adiff=%f sample_diff=%d apts=%0.3f vpts=%0.3f %f\n",
1818                         diff, avg_diff, samples_size - samples_size1,
1819                         is->audio_clock, is->video_clock, is->audio_diff_threshold);
1820             }
1821         } else {
1822             /* too big difference : may be initial PTS errors, so
1823                reset A-V filter */
1824             is->audio_diff_avg_count = 0;
1825             is->audio_diff_cum       = 0;
1826         }
1827     }
1828
1829     return samples_size;
1830 }
1831
1832 /* decode one audio frame and returns its uncompressed size */
1833 static int audio_decode_frame(VideoState *is, double *pts_ptr)
1834 {
1835     AVPacket *pkt_temp = &is->audio_pkt_temp;
1836     AVPacket *pkt = &is->audio_pkt;
1837     AVCodecContext *dec = is->audio_st->codec;
1838     int n, len1, data_size, got_frame;
1839     double pts;
1840     int new_packet = 0;
1841     int flush_complete = 0;
1842
1843     for (;;) {
1844         /* NOTE: the audio packet can contain several frames */
1845         while (pkt_temp->size > 0 || (!pkt_temp->data && new_packet)) {
1846             int resample_changed, audio_resample;
1847
1848             if (!is->frame) {
1849                 if (!(is->frame = av_frame_alloc()))
1850                     return AVERROR(ENOMEM);
1851             }
1852
1853             if (flush_complete)
1854                 break;
1855             new_packet = 0;
1856             len1 = avcodec_decode_audio4(dec, is->frame, &got_frame, pkt_temp);
1857             if (len1 < 0) {
1858                 /* if error, we skip the frame */
1859                 pkt_temp->size = 0;
1860                 break;
1861             }
1862
1863             pkt_temp->data += len1;
1864             pkt_temp->size -= len1;
1865
1866             if (!got_frame) {
1867                 /* stop sending empty packets if the decoder is finished */
1868                 if (!pkt_temp->data && dec->codec->capabilities & CODEC_CAP_DELAY)
1869                     flush_complete = 1;
1870                 continue;
1871             }
1872             data_size = av_samples_get_buffer_size(NULL, dec->channels,
1873                                                    is->frame->nb_samples,
1874                                                    is->frame->format, 1);
1875
1876             audio_resample = is->frame->format         != is->sdl_sample_fmt     ||
1877                              is->frame->channel_layout != is->sdl_channel_layout ||
1878                              is->frame->sample_rate    != is->sdl_sample_rate;
1879
1880             resample_changed = is->frame->format         != is->resample_sample_fmt     ||
1881                                is->frame->channel_layout != is->resample_channel_layout ||
1882                                is->frame->sample_rate    != is->resample_sample_rate;
1883
1884             if ((!is->avr && audio_resample) || resample_changed) {
1885                 int ret;
1886                 if (is->avr)
1887                     avresample_close(is->avr);
1888                 else if (audio_resample) {
1889                     is->avr = avresample_alloc_context();
1890                     if (!is->avr) {
1891                         fprintf(stderr, "error allocating AVAudioResampleContext\n");
1892                         break;
1893                     }
1894                 }
1895                 if (audio_resample) {
1896                     av_opt_set_int(is->avr, "in_channel_layout",  is->frame->channel_layout, 0);
1897                     av_opt_set_int(is->avr, "in_sample_fmt",      is->frame->format,         0);
1898                     av_opt_set_int(is->avr, "in_sample_rate",     is->frame->sample_rate,    0);
1899                     av_opt_set_int(is->avr, "out_channel_layout", is->sdl_channel_layout,    0);
1900                     av_opt_set_int(is->avr, "out_sample_fmt",     is->sdl_sample_fmt,        0);
1901                     av_opt_set_int(is->avr, "out_sample_rate",    is->sdl_sample_rate,       0);
1902
1903                     if ((ret = avresample_open(is->avr)) < 0) {
1904                         fprintf(stderr, "error initializing libavresample\n");
1905                         break;
1906                     }
1907                 }
1908                 is->resample_sample_fmt     = is->frame->format;
1909                 is->resample_channel_layout = is->frame->channel_layout;
1910                 is->resample_sample_rate    = is->frame->sample_rate;
1911             }
1912
1913             if (audio_resample) {
1914                 void *tmp_out;
1915                 int out_samples, out_size, out_linesize;
1916                 int osize      = av_get_bytes_per_sample(is->sdl_sample_fmt);
1917                 int nb_samples = is->frame->nb_samples;
1918
1919                 out_size = av_samples_get_buffer_size(&out_linesize,
1920                                                       is->sdl_channels,
1921                                                       nb_samples,
1922                                                       is->sdl_sample_fmt, 0);
1923                 tmp_out = av_realloc(is->audio_buf1, out_size);
1924                 if (!tmp_out)
1925                     return AVERROR(ENOMEM);
1926                 is->audio_buf1 = tmp_out;
1927
1928                 out_samples = avresample_convert(is->avr,
1929                                                  &is->audio_buf1,
1930                                                  out_linesize, nb_samples,
1931                                                  is->frame->data,
1932                                                  is->frame->linesize[0],
1933                                                  is->frame->nb_samples);
1934                 if (out_samples < 0) {
1935                     fprintf(stderr, "avresample_convert() failed\n");
1936                     break;
1937                 }
1938                 is->audio_buf = is->audio_buf1;
1939                 data_size = out_samples * osize * is->sdl_channels;
1940             } else {
1941                 is->audio_buf = is->frame->data[0];
1942             }
1943
1944             /* if no pts, then compute it */
1945             pts = is->audio_clock;
1946             *pts_ptr = pts;
1947             n = is->sdl_channels * av_get_bytes_per_sample(is->sdl_sample_fmt);
1948             is->audio_clock += (double)data_size /
1949                 (double)(n * is->sdl_sample_rate);
1950 #ifdef DEBUG
1951             {
1952                 static double last_clock;
1953                 printf("audio: delay=%0.3f clock=%0.3f pts=%0.3f\n",
1954                        is->audio_clock - last_clock,
1955                        is->audio_clock, pts);
1956                 last_clock = is->audio_clock;
1957             }
1958 #endif
1959             return data_size;
1960         }
1961
1962         /* free the current packet */
1963         if (pkt->data)
1964             av_free_packet(pkt);
1965         memset(pkt_temp, 0, sizeof(*pkt_temp));
1966
1967         if (is->paused || is->audioq.abort_request) {
1968             return -1;
1969         }
1970
1971         /* read next packet */
1972         if ((new_packet = packet_queue_get(&is->audioq, pkt, 1)) < 0)
1973             return -1;
1974
1975         if (pkt->data == flush_pkt.data) {
1976             avcodec_flush_buffers(dec);
1977             flush_complete = 0;
1978         }
1979
1980         *pkt_temp = *pkt;
1981
1982         /* if update the audio clock with the pts */
1983         if (pkt->pts != AV_NOPTS_VALUE) {
1984             is->audio_clock = av_q2d(is->audio_st->time_base)*pkt->pts;
1985         }
1986     }
1987 }
1988
1989 /* prepare a new audio buffer */
1990 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
1991 {
1992     VideoState *is = opaque;
1993     int audio_size, len1;
1994     double pts;
1995
1996     audio_callback_time = av_gettime();
1997
1998     while (len > 0) {
1999         if (is->audio_buf_index >= is->audio_buf_size) {
2000            audio_size = audio_decode_frame(is, &pts);
2001            if (audio_size < 0) {
2002                 /* if error, just output silence */
2003                is->audio_buf      = is->silence_buf;
2004                is->audio_buf_size = sizeof(is->silence_buf);
2005            } else {
2006                if (is->show_audio)
2007                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2008                audio_size = synchronize_audio(is, (int16_t *)is->audio_buf, audio_size,
2009                                               pts);
2010                is->audio_buf_size = audio_size;
2011            }
2012            is->audio_buf_index = 0;
2013         }
2014         len1 = is->audio_buf_size - is->audio_buf_index;
2015         if (len1 > len)
2016             len1 = len;
2017         memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2018         len -= len1;
2019         stream += len1;
2020         is->audio_buf_index += len1;
2021     }
2022 }
2023
2024 /* open a given stream. Return 0 if OK */
2025 static int stream_component_open(VideoState *is, int stream_index)
2026 {
2027     AVFormatContext *ic = is->ic;
2028     AVCodecContext *avctx;
2029     AVCodec *codec;
2030     SDL_AudioSpec wanted_spec, spec;
2031     AVDictionary *opts;
2032     AVDictionaryEntry *t = NULL;
2033
2034     if (stream_index < 0 || stream_index >= ic->nb_streams)
2035         return -1;
2036     avctx = ic->streams[stream_index]->codec;
2037
2038     opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], NULL);
2039
2040     codec = avcodec_find_decoder(avctx->codec_id);
2041     avctx->workaround_bugs   = workaround_bugs;
2042     avctx->idct_algo         = idct;
2043     avctx->skip_frame        = skip_frame;
2044     avctx->skip_idct         = skip_idct;
2045     avctx->skip_loop_filter  = skip_loop_filter;
2046     avctx->error_concealment = error_concealment;
2047
2048     if (fast)   avctx->flags2 |= CODEC_FLAG2_FAST;
2049
2050     if (!av_dict_get(opts, "threads", NULL, 0))
2051         av_dict_set(&opts, "threads", "auto", 0);
2052     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO)
2053         av_dict_set(&opts, "refcounted_frames", "1", 0);
2054     if (!codec ||
2055         avcodec_open2(avctx, codec, &opts) < 0)
2056         return -1;
2057     if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2058         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2059         return AVERROR_OPTION_NOT_FOUND;
2060     }
2061
2062     /* prepare audio output */
2063     if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
2064         is->sdl_sample_rate = avctx->sample_rate;
2065
2066         if (!avctx->channel_layout)
2067             avctx->channel_layout = av_get_default_channel_layout(avctx->channels);
2068         if (!avctx->channel_layout) {
2069             fprintf(stderr, "unable to guess channel layout\n");
2070             return -1;
2071         }
2072         if (avctx->channels == 1)
2073             is->sdl_channel_layout = AV_CH_LAYOUT_MONO;
2074         else
2075             is->sdl_channel_layout = AV_CH_LAYOUT_STEREO;
2076         is->sdl_channels = av_get_channel_layout_nb_channels(is->sdl_channel_layout);
2077
2078         wanted_spec.format = AUDIO_S16SYS;
2079         wanted_spec.freq = is->sdl_sample_rate;
2080         wanted_spec.channels = is->sdl_channels;
2081         wanted_spec.silence = 0;
2082         wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
2083         wanted_spec.callback = sdl_audio_callback;
2084         wanted_spec.userdata = is;
2085         if (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
2086             fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError());
2087             return -1;
2088         }
2089         is->audio_hw_buf_size = spec.size;
2090         is->sdl_sample_fmt          = AV_SAMPLE_FMT_S16;
2091         is->resample_sample_fmt     = is->sdl_sample_fmt;
2092         is->resample_channel_layout = avctx->channel_layout;
2093         is->resample_sample_rate    = avctx->sample_rate;
2094     }
2095
2096     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
2097     switch (avctx->codec_type) {
2098     case AVMEDIA_TYPE_AUDIO:
2099         is->audio_stream = stream_index;
2100         is->audio_st = ic->streams[stream_index];
2101         is->audio_buf_size  = 0;
2102         is->audio_buf_index = 0;
2103
2104         /* init averaging filter */
2105         is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2106         is->audio_diff_avg_count = 0;
2107         /* since we do not have a precise anough audio fifo fullness,
2108            we correct audio sync only if larger than this threshold */
2109         is->audio_diff_threshold = 2.0 * SDL_AUDIO_BUFFER_SIZE / avctx->sample_rate;
2110
2111         memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
2112         packet_queue_init(&is->audioq);
2113         SDL_PauseAudio(0);
2114         break;
2115     case AVMEDIA_TYPE_VIDEO:
2116         is->video_stream = stream_index;
2117         is->video_st = ic->streams[stream_index];
2118
2119         packet_queue_init(&is->videoq);
2120         is->video_tid = SDL_CreateThread(video_thread, is);
2121         break;
2122     case AVMEDIA_TYPE_SUBTITLE:
2123         is->subtitle_stream = stream_index;
2124         is->subtitle_st = ic->streams[stream_index];
2125         packet_queue_init(&is->subtitleq);
2126
2127         is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
2128         break;
2129     default:
2130         break;
2131     }
2132     return 0;
2133 }
2134
2135 static void stream_component_close(VideoState *is, int stream_index)
2136 {
2137     AVFormatContext *ic = is->ic;
2138     AVCodecContext *avctx;
2139
2140     if (stream_index < 0 || stream_index >= ic->nb_streams)
2141         return;
2142     avctx = ic->streams[stream_index]->codec;
2143
2144     switch (avctx->codec_type) {
2145     case AVMEDIA_TYPE_AUDIO:
2146         packet_queue_abort(&is->audioq);
2147
2148         SDL_CloseAudio();
2149
2150         packet_queue_end(&is->audioq);
2151         av_free_packet(&is->audio_pkt);
2152         if (is->avr)
2153             avresample_free(&is->avr);
2154         av_freep(&is->audio_buf1);
2155         is->audio_buf = NULL;
2156         av_frame_free(&is->frame);
2157
2158         if (is->rdft) {
2159             av_rdft_end(is->rdft);
2160             av_freep(&is->rdft_data);
2161             is->rdft = NULL;
2162             is->rdft_bits = 0;
2163         }
2164         break;
2165     case AVMEDIA_TYPE_VIDEO:
2166         packet_queue_abort(&is->videoq);
2167
2168         /* note: we also signal this mutex to make sure we deblock the
2169            video thread in all cases */
2170         SDL_LockMutex(is->pictq_mutex);
2171         SDL_CondSignal(is->pictq_cond);
2172         SDL_UnlockMutex(is->pictq_mutex);
2173
2174         SDL_WaitThread(is->video_tid, NULL);
2175
2176         packet_queue_end(&is->videoq);
2177         break;
2178     case AVMEDIA_TYPE_SUBTITLE:
2179         packet_queue_abort(&is->subtitleq);
2180
2181         /* note: we also signal this mutex to make sure we deblock the
2182            video thread in all cases */
2183         SDL_LockMutex(is->subpq_mutex);
2184         is->subtitle_stream_changed = 1;
2185
2186         SDL_CondSignal(is->subpq_cond);
2187         SDL_UnlockMutex(is->subpq_mutex);
2188
2189         SDL_WaitThread(is->subtitle_tid, NULL);
2190
2191         packet_queue_end(&is->subtitleq);
2192         break;
2193     default:
2194         break;
2195     }
2196
2197     ic->streams[stream_index]->discard = AVDISCARD_ALL;
2198     avcodec_close(avctx);
2199     switch (avctx->codec_type) {
2200     case AVMEDIA_TYPE_AUDIO:
2201         is->audio_st = NULL;
2202         is->audio_stream = -1;
2203         break;
2204     case AVMEDIA_TYPE_VIDEO:
2205         is->video_st = NULL;
2206         is->video_stream = -1;
2207         break;
2208     case AVMEDIA_TYPE_SUBTITLE:
2209         is->subtitle_st = NULL;
2210         is->subtitle_stream = -1;
2211         break;
2212     default:
2213         break;
2214     }
2215 }
2216
2217 /* since we have only one decoding thread, we can use a global
2218    variable instead of a thread local variable */
2219 static VideoState *global_video_state;
2220
2221 static int decode_interrupt_cb(void *ctx)
2222 {
2223     return global_video_state && global_video_state->abort_request;
2224 }
2225
2226 /* this thread gets the stream from the disk or the network */
2227 static int decode_thread(void *arg)
2228 {
2229     VideoState *is = arg;
2230     AVFormatContext *ic = NULL;
2231     int err, i, ret;
2232     int st_index[AVMEDIA_TYPE_NB];
2233     AVPacket pkt1, *pkt = &pkt1;
2234     int eof = 0;
2235     int pkt_in_play_range = 0;
2236     AVDictionaryEntry *t;
2237     AVDictionary **opts;
2238     int orig_nb_streams;
2239
2240     memset(st_index, -1, sizeof(st_index));
2241     is->video_stream = -1;
2242     is->audio_stream = -1;
2243     is->subtitle_stream = -1;
2244
2245     global_video_state = is;
2246
2247     ic = avformat_alloc_context();
2248     ic->interrupt_callback.callback = decode_interrupt_cb;
2249     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2250     if (err < 0) {
2251         print_error(is->filename, err);
2252         ret = -1;
2253         goto fail;
2254     }
2255     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2256         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2257         ret = AVERROR_OPTION_NOT_FOUND;
2258         goto fail;
2259     }
2260     is->ic = ic;
2261
2262     if (genpts)
2263         ic->flags |= AVFMT_FLAG_GENPTS;
2264
2265     opts = setup_find_stream_info_opts(ic, codec_opts);
2266     orig_nb_streams = ic->nb_streams;
2267
2268     err = avformat_find_stream_info(ic, opts);
2269     if (err < 0) {
2270         fprintf(stderr, "%s: could not find codec parameters\n", is->filename);
2271         ret = -1;
2272         goto fail;
2273     }
2274     for (i = 0; i < orig_nb_streams; i++)
2275         av_dict_free(&opts[i]);
2276     av_freep(&opts);
2277
2278     if (ic->pb)
2279         ic->pb->eof_reached = 0; // FIXME hack, avplay maybe should not use url_feof() to test for the end
2280
2281     if (seek_by_bytes < 0)
2282         seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT);
2283
2284     /* if seeking requested, we execute it */
2285     if (start_time != AV_NOPTS_VALUE) {
2286         int64_t timestamp;
2287
2288         timestamp = start_time;
2289         /* add the stream start time */
2290         if (ic->start_time != AV_NOPTS_VALUE)
2291             timestamp += ic->start_time;
2292         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
2293         if (ret < 0) {
2294             fprintf(stderr, "%s: could not seek to position %0.3f\n",
2295                     is->filename, (double)timestamp / AV_TIME_BASE);
2296         }
2297     }
2298
2299     for (i = 0; i < ic->nb_streams; i++)
2300         ic->streams[i]->discard = AVDISCARD_ALL;
2301     if (!video_disable)
2302         st_index[AVMEDIA_TYPE_VIDEO] =
2303             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
2304                                 wanted_stream[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
2305     if (!audio_disable)
2306         st_index[AVMEDIA_TYPE_AUDIO] =
2307             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
2308                                 wanted_stream[AVMEDIA_TYPE_AUDIO],
2309                                 st_index[AVMEDIA_TYPE_VIDEO],
2310                                 NULL, 0);
2311     if (!video_disable)
2312         st_index[AVMEDIA_TYPE_SUBTITLE] =
2313             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
2314                                 wanted_stream[AVMEDIA_TYPE_SUBTITLE],
2315                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
2316                                  st_index[AVMEDIA_TYPE_AUDIO] :
2317                                  st_index[AVMEDIA_TYPE_VIDEO]),
2318                                 NULL, 0);
2319     if (show_status) {
2320         av_dump_format(ic, 0, is->filename, 0);
2321     }
2322
2323     /* open the streams */
2324     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
2325         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2326     }
2327
2328     ret = -1;
2329     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2330         ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2331     }
2332     is->refresh_tid = SDL_CreateThread(refresh_thread, is);
2333     if (ret < 0) {
2334         if (!display_disable)
2335             is->show_audio = 2;
2336     }
2337
2338     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
2339         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2340     }
2341
2342     if (is->video_stream < 0 && is->audio_stream < 0) {
2343         fprintf(stderr, "%s: could not open codecs\n", is->filename);
2344         ret = -1;
2345         goto fail;
2346     }
2347
2348     for (;;) {
2349         if (is->abort_request)
2350             break;
2351         if (is->paused != is->last_paused) {
2352             is->last_paused = is->paused;
2353             if (is->paused)
2354                 is->read_pause_return = av_read_pause(ic);
2355             else
2356                 av_read_play(ic);
2357         }
2358 #if CONFIG_RTSP_DEMUXER
2359         if (is->paused && !strcmp(ic->iformat->name, "rtsp")) {
2360             /* wait 10 ms to avoid trying to get another packet */
2361             /* XXX: horrible */
2362             SDL_Delay(10);
2363             continue;
2364         }
2365 #endif
2366         if (is->seek_req) {
2367             int64_t seek_target = is->seek_pos;
2368             int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2369             int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2370 // FIXME the +-2 is due to rounding being not done in the correct direction in generation
2371 //      of the seek_pos/seek_rel variables
2372
2373             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2374             if (ret < 0) {
2375                 fprintf(stderr, "%s: error while seeking\n", is->ic->filename);
2376             } else {
2377                 if (is->audio_stream >= 0) {
2378                     packet_queue_flush(&is->audioq);
2379                     packet_queue_put(&is->audioq, &flush_pkt);
2380                 }
2381                 if (is->subtitle_stream >= 0) {
2382                     packet_queue_flush(&is->subtitleq);
2383                     packet_queue_put(&is->subtitleq, &flush_pkt);
2384                 }
2385                 if (is->video_stream >= 0) {
2386                     packet_queue_flush(&is->videoq);
2387                     packet_queue_put(&is->videoq, &flush_pkt);
2388                 }
2389             }
2390             is->seek_req = 0;
2391             eof = 0;
2392         }
2393
2394         /* if the queue are full, no need to read more */
2395         if (!infinite_buffer &&
2396               (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2397             || (   (is->audioq   .size  > MIN_AUDIOQ_SIZE || is->audio_stream < 0)
2398                 && (is->videoq   .nb_packets > MIN_FRAMES || is->video_stream < 0)
2399                 && (is->subtitleq.nb_packets > MIN_FRAMES || is->subtitle_stream < 0)))) {
2400             /* wait 10 ms */
2401             SDL_Delay(10);
2402             continue;
2403         }
2404         if (eof) {
2405             if (is->video_stream >= 0) {
2406                 av_init_packet(pkt);
2407                 pkt->data = NULL;
2408                 pkt->size = 0;
2409                 pkt->stream_index = is->video_stream;
2410                 packet_queue_put(&is->videoq, pkt);
2411             }
2412             if (is->audio_stream >= 0 &&
2413                 is->audio_st->codec->codec->capabilities & CODEC_CAP_DELAY) {
2414                 av_init_packet(pkt);
2415                 pkt->data = NULL;
2416                 pkt->size = 0;
2417                 pkt->stream_index = is->audio_stream;
2418                 packet_queue_put(&is->audioq, pkt);
2419             }
2420             SDL_Delay(10);
2421             if (is->audioq.size + is->videoq.size + is->subtitleq.size == 0) {
2422                 if (loop != 1 && (!loop || --loop)) {
2423                     stream_seek(cur_stream, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
2424                 } else if (autoexit) {
2425                     ret = AVERROR_EOF;
2426                     goto fail;
2427                 }
2428             }
2429             continue;
2430         }
2431         ret = av_read_frame(ic, pkt);
2432         if (ret < 0) {
2433             if (ret == AVERROR_EOF || (ic->pb && ic->pb->eof_reached))
2434                 eof = 1;
2435             if (ic->pb && ic->pb->error)
2436                 break;
2437             SDL_Delay(100); /* wait for user event */
2438             continue;
2439         }
2440         /* check if packet is in play range specified by user, then queue, otherwise discard */
2441         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
2442                 (pkt->pts - ic->streams[pkt->stream_index]->start_time) *
2443                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
2444                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
2445                 <= ((double)duration / 1000000);
2446         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
2447             packet_queue_put(&is->audioq, pkt);
2448         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range) {
2449             packet_queue_put(&is->videoq, pkt);
2450         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
2451             packet_queue_put(&is->subtitleq, pkt);
2452         } else {
2453             av_free_packet(pkt);
2454         }
2455     }
2456     /* wait until the end */
2457     while (!is->abort_request) {
2458         SDL_Delay(100);
2459     }
2460
2461     ret = 0;
2462  fail:
2463     /* disable interrupting */
2464     global_video_state = NULL;
2465
2466     /* close each stream */
2467     if (is->audio_stream >= 0)
2468         stream_component_close(is, is->audio_stream);
2469     if (is->video_stream >= 0)
2470         stream_component_close(is, is->video_stream);
2471     if (is->subtitle_stream >= 0)
2472         stream_component_close(is, is->subtitle_stream);
2473     if (is->ic) {
2474         avformat_close_input(&is->ic);
2475     }
2476
2477     if (ret != 0) {
2478         SDL_Event event;
2479
2480         event.type = FF_QUIT_EVENT;
2481         event.user.data1 = is;
2482         SDL_PushEvent(&event);
2483     }
2484     return 0;
2485 }
2486
2487 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
2488 {
2489     VideoState *is;
2490
2491     is = av_mallocz(sizeof(VideoState));
2492     if (!is)
2493         return NULL;
2494     av_strlcpy(is->filename, filename, sizeof(is->filename));
2495     is->iformat = iformat;
2496     is->ytop    = 0;
2497     is->xleft   = 0;
2498
2499     /* start video display */
2500     is->pictq_mutex = SDL_CreateMutex();
2501     is->pictq_cond  = SDL_CreateCond();
2502
2503     is->subpq_mutex = SDL_CreateMutex();
2504     is->subpq_cond  = SDL_CreateCond();
2505
2506     is->av_sync_type = av_sync_type;
2507     is->parse_tid    = SDL_CreateThread(decode_thread, is);
2508     if (!is->parse_tid) {
2509         av_free(is);
2510         return NULL;
2511     }
2512     return is;
2513 }
2514
2515 static void stream_cycle_channel(VideoState *is, int codec_type)
2516 {
2517     AVFormatContext *ic = is->ic;
2518     int start_index, stream_index;
2519     AVStream *st;
2520
2521     if (codec_type == AVMEDIA_TYPE_VIDEO)
2522         start_index = is->video_stream;
2523     else if (codec_type == AVMEDIA_TYPE_AUDIO)
2524         start_index = is->audio_stream;
2525     else
2526         start_index = is->subtitle_stream;
2527     if (start_index < (codec_type == AVMEDIA_TYPE_SUBTITLE ? -1 : 0))
2528         return;
2529     stream_index = start_index;
2530     for (;;) {
2531         if (++stream_index >= is->ic->nb_streams)
2532         {
2533             if (codec_type == AVMEDIA_TYPE_SUBTITLE)
2534             {
2535                 stream_index = -1;
2536                 goto the_end;
2537             } else
2538                 stream_index = 0;
2539         }
2540         if (stream_index == start_index)
2541             return;
2542         st = ic->streams[stream_index];
2543         if (st->codec->codec_type == codec_type) {
2544             /* check that parameters are OK */
2545             switch (codec_type) {
2546             case AVMEDIA_TYPE_AUDIO:
2547                 if (st->codec->sample_rate != 0 &&
2548                     st->codec->channels != 0)
2549                     goto the_end;
2550                 break;
2551             case AVMEDIA_TYPE_VIDEO:
2552             case AVMEDIA_TYPE_SUBTITLE:
2553                 goto the_end;
2554             default:
2555                 break;
2556             }
2557         }
2558     }
2559  the_end:
2560     stream_component_close(is, start_index);
2561     stream_component_open(is, stream_index);
2562 }
2563
2564
2565 static void toggle_full_screen(void)
2566 {
2567 #if defined(__APPLE__) && SDL_VERSION_ATLEAST(1, 2, 14)
2568     /* OS X needs to empty the picture_queue */
2569     int i;
2570     for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++)
2571         cur_stream->pictq[i].reallocate = 1;
2572 #endif
2573     is_full_screen = !is_full_screen;
2574     video_open(cur_stream);
2575 }
2576
2577 static void toggle_pause(void)
2578 {
2579     if (cur_stream)
2580         stream_pause(cur_stream);
2581     step = 0;
2582 }
2583
2584 static void step_to_next_frame(void)
2585 {
2586     if (cur_stream) {
2587         /* if the stream is paused unpause it, then step */
2588         if (cur_stream->paused)
2589             stream_pause(cur_stream);
2590     }
2591     step = 1;
2592 }
2593
2594 static void toggle_audio_display(void)
2595 {
2596     if (cur_stream) {
2597         int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
2598         cur_stream->show_audio = (cur_stream->show_audio + 1) % 3;
2599         fill_rectangle(screen,
2600                        cur_stream->xleft, cur_stream->ytop, cur_stream->width, cur_stream->height,
2601                        bgcolor);
2602         SDL_UpdateRect(screen, cur_stream->xleft, cur_stream->ytop, cur_stream->width, cur_stream->height);
2603     }
2604 }
2605
2606 static void seek_chapter(VideoState *is, int incr)
2607 {
2608     int64_t pos = get_master_clock(is) * AV_TIME_BASE;
2609     int i;
2610
2611     if (!is->ic->nb_chapters)
2612         return;
2613
2614     /* find the current chapter */
2615     for (i = 0; i < is->ic->nb_chapters; i++) {
2616         AVChapter *ch = is->ic->chapters[i];
2617         if (av_compare_ts(pos, AV_TIME_BASE_Q, ch->start, ch->time_base) < 0) {
2618             i--;
2619             break;
2620         }
2621     }
2622
2623     i += incr;
2624     i = FFMAX(i, 0);
2625     if (i >= is->ic->nb_chapters)
2626         return;
2627
2628     av_log(NULL, AV_LOG_VERBOSE, "Seeking to chapter %d.\n", i);
2629     stream_seek(is, av_rescale_q(is->ic->chapters[i]->start, is->ic->chapters[i]->time_base,
2630                                  AV_TIME_BASE_Q), 0, 0);
2631 }
2632
2633 /* handle an event sent by the GUI */
2634 static void event_loop(void)
2635 {
2636     SDL_Event event;
2637     double incr, pos, frac;
2638
2639     for (;;) {
2640         double x;
2641         SDL_WaitEvent(&event);
2642         switch (event.type) {
2643         case SDL_KEYDOWN:
2644             if (exit_on_keydown) {
2645                 do_exit();
2646                 break;
2647             }
2648             switch (event.key.keysym.sym) {
2649             case SDLK_ESCAPE:
2650             case SDLK_q:
2651                 do_exit();
2652                 break;
2653             case SDLK_f:
2654                 toggle_full_screen();
2655                 break;
2656             case SDLK_p:
2657             case SDLK_SPACE:
2658                 toggle_pause();
2659                 break;
2660             case SDLK_s: // S: Step to next frame
2661                 step_to_next_frame();
2662                 break;
2663             case SDLK_a:
2664                 if (cur_stream)
2665                     stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
2666                 break;
2667             case SDLK_v:
2668                 if (cur_stream)
2669                     stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
2670                 break;
2671             case SDLK_t:
2672                 if (cur_stream)
2673                     stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
2674                 break;
2675             case SDLK_w:
2676                 toggle_audio_display();
2677                 break;
2678             case SDLK_PAGEUP:
2679                 seek_chapter(cur_stream, 1);
2680                 break;
2681             case SDLK_PAGEDOWN:
2682                 seek_chapter(cur_stream, -1);
2683                 break;
2684             case SDLK_LEFT:
2685                 incr = -10.0;
2686                 goto do_seek;
2687             case SDLK_RIGHT:
2688                 incr = 10.0;
2689                 goto do_seek;
2690             case SDLK_UP:
2691                 incr = 60.0;
2692                 goto do_seek;
2693             case SDLK_DOWN:
2694                 incr = -60.0;
2695             do_seek:
2696                 if (cur_stream) {
2697                     if (seek_by_bytes) {
2698                         if (cur_stream->video_stream >= 0 && cur_stream->video_current_pos >= 0) {
2699                             pos = cur_stream->video_current_pos;
2700                         } else if (cur_stream->audio_stream >= 0 && cur_stream->audio_pkt.pos >= 0) {
2701                             pos = cur_stream->audio_pkt.pos;
2702                         } else
2703                             pos = avio_tell(cur_stream->ic->pb);
2704                         if (cur_stream->ic->bit_rate)
2705                             incr *= cur_stream->ic->bit_rate / 8.0;
2706                         else
2707                             incr *= 180000.0;
2708                         pos += incr;
2709                         stream_seek(cur_stream, pos, incr, 1);
2710                     } else {
2711                         pos = get_master_clock(cur_stream);
2712                         pos += incr;
2713                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
2714                     }
2715                 }
2716                 break;
2717             default:
2718                 break;
2719             }
2720             break;
2721         case SDL_MOUSEBUTTONDOWN:
2722             if (exit_on_mousedown) {
2723                 do_exit();
2724                 break;
2725             }
2726         case SDL_MOUSEMOTION:
2727             if (event.type == SDL_MOUSEBUTTONDOWN) {
2728                 x = event.button.x;
2729             } else {
2730                 if (event.motion.state != SDL_PRESSED)
2731                     break;
2732                 x = event.motion.x;
2733             }
2734             if (cur_stream) {
2735                 if (seek_by_bytes || cur_stream->ic->duration <= 0) {
2736                     uint64_t size =  avio_size(cur_stream->ic->pb);
2737                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
2738                 } else {
2739                     int64_t ts;
2740                     int ns, hh, mm, ss;
2741                     int tns, thh, tmm, tss;
2742                     tns  = cur_stream->ic->duration / 1000000LL;
2743                     thh  = tns / 3600;
2744                     tmm  = (tns % 3600) / 60;
2745                     tss  = (tns % 60);
2746                     frac = x / cur_stream->width;
2747                     ns   = frac * tns;
2748                     hh   = ns / 3600;
2749                     mm   = (ns % 3600) / 60;
2750                     ss   = (ns % 60);
2751                     fprintf(stderr, "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
2752                             hh, mm, ss, thh, tmm, tss);
2753                     ts = frac * cur_stream->ic->duration;
2754                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
2755                         ts += cur_stream->ic->start_time;
2756                     stream_seek(cur_stream, ts, 0, 0);
2757                 }
2758             }
2759             break;
2760         case SDL_VIDEORESIZE:
2761             if (cur_stream) {
2762                 screen = SDL_SetVideoMode(event.resize.w, event.resize.h, 0,
2763                                           SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
2764                 screen_width  = cur_stream->width  = event.resize.w;
2765                 screen_height = cur_stream->height = event.resize.h;
2766             }
2767             break;
2768         case SDL_QUIT:
2769         case FF_QUIT_EVENT:
2770             do_exit();
2771             break;
2772         case FF_ALLOC_EVENT:
2773             video_open(event.user.data1);
2774             alloc_picture(event.user.data1);
2775             break;
2776         case FF_REFRESH_EVENT:
2777             video_refresh_timer(event.user.data1);
2778             cur_stream->refresh = 0;
2779             break;
2780         default:
2781             break;
2782         }
2783     }
2784 }
2785
2786 static int opt_frame_size(void *optctx, const char *opt, const char *arg)
2787 {
2788     av_log(NULL, AV_LOG_ERROR,
2789            "Option '%s' has been removed, use private format options instead\n", opt);
2790     return AVERROR(EINVAL);
2791 }
2792
2793 static int opt_width(void *optctx, const char *opt, const char *arg)
2794 {
2795     screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
2796     return 0;
2797 }
2798
2799 static int opt_height(void *optctx, const char *opt, const char *arg)
2800 {
2801     screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
2802     return 0;
2803 }
2804
2805 static int opt_format(void *optctx, const char *opt, const char *arg)
2806 {
2807     file_iformat = av_find_input_format(arg);
2808     if (!file_iformat) {
2809         fprintf(stderr, "Unknown input format: %s\n", arg);
2810         return AVERROR(EINVAL);
2811     }
2812     return 0;
2813 }
2814
2815 static int opt_frame_pix_fmt(void *optctx, const char *opt, const char *arg)
2816 {
2817     av_log(NULL, AV_LOG_ERROR,
2818            "Option '%s' has been removed, use private format options instead\n", opt);
2819     return AVERROR(EINVAL);
2820 }
2821
2822 static int opt_sync(void *optctx, const char *opt, const char *arg)
2823 {
2824     if (!strcmp(arg, "audio"))
2825         av_sync_type = AV_SYNC_AUDIO_MASTER;
2826     else if (!strcmp(arg, "video"))
2827         av_sync_type = AV_SYNC_VIDEO_MASTER;
2828     else if (!strcmp(arg, "ext"))
2829         av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
2830     else {
2831         fprintf(stderr, "Unknown value for %s: %s\n", opt, arg);
2832         exit(1);
2833     }
2834     return 0;
2835 }
2836
2837 static int opt_seek(void *optctx, const char *opt, const char *arg)
2838 {
2839     start_time = parse_time_or_die(opt, arg, 1);
2840     return 0;
2841 }
2842
2843 static int opt_duration(void *optctx, const char *opt, const char *arg)
2844 {
2845     duration = parse_time_or_die(opt, arg, 1);
2846     return 0;
2847 }
2848
2849 static const OptionDef options[] = {
2850 #include "cmdutils_common_opts.h"
2851     { "x", HAS_ARG, { .func_arg = opt_width }, "force displayed width", "width" },
2852     { "y", HAS_ARG, { .func_arg = opt_height }, "force displayed height", "height" },
2853     { "s", HAS_ARG | OPT_VIDEO, { .func_arg = opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
2854     { "fs", OPT_BOOL, { &is_full_screen }, "force full screen" },
2855     { "an", OPT_BOOL, { &audio_disable }, "disable audio" },
2856     { "vn", OPT_BOOL, { &video_disable }, "disable video" },
2857     { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_number" },
2858     { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_number" },
2859     { "sst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_number" },
2860     { "ss", HAS_ARG, { .func_arg = opt_seek }, "seek to a given position in seconds", "pos" },
2861     { "t", HAS_ARG, { .func_arg = opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
2862     { "bytes", OPT_INT | HAS_ARG, { &seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
2863     { "nodisp", OPT_BOOL, { &display_disable }, "disable graphical display" },
2864     { "f", HAS_ARG, { .func_arg = opt_format }, "force format", "fmt" },
2865     { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_frame_pix_fmt }, "set pixel format", "format" },
2866     { "stats", OPT_BOOL | OPT_EXPERT, { &show_status }, "show status", "" },
2867     { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, { &workaround_bugs }, "workaround bugs", "" },
2868     { "fast", OPT_BOOL | OPT_EXPERT, { &fast }, "non spec compliant optimizations", "" },
2869     { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
2870     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
2871     { "skiploop", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_loop_filter }, "", "" },
2872     { "skipframe", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_frame }, "", "" },
2873     { "skipidct", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_idct }, "", "" },
2874     { "idct", OPT_INT | HAS_ARG | OPT_EXPERT, { &idct }, "set idct algo",  "algo" },
2875     { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, { &error_concealment }, "set error concealment options",  "bit_mask" },
2876     { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
2877     { "autoexit", OPT_BOOL | OPT_EXPERT, { &autoexit }, "exit at the end", "" },
2878     { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { &exit_on_keydown }, "exit on key down", "" },
2879     { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { &exit_on_mousedown }, "exit on mouse down", "" },
2880     { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { &loop }, "set number of times the playback shall be looped", "loop count" },
2881     { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
2882     { "infbuf", OPT_BOOL | OPT_EXPERT, { &infinite_buffer }, "don't limit the input buffer size (useful with realtime streams)", "" },
2883     { "window_title", OPT_STRING | HAS_ARG, { &window_title }, "set window title", "window title" },
2884 #if CONFIG_AVFILTER
2885     { "vf", OPT_STRING | HAS_ARG, { &vfilters }, "video filters", "filter list" },
2886 #endif
2887     { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { &rdftspeed }, "rdft speed", "msecs" },
2888     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { opt_default }, "generic catch all option", "" },
2889     { "i", 0, { NULL }, "avconv compatibility dummy option", ""},
2890     { NULL, },
2891 };
2892
2893 static void show_usage(void)
2894 {
2895     printf("Simple media player\n");
2896     printf("usage: %s [options] input_file\n", program_name);
2897     printf("\n");
2898 }
2899
2900 void show_help_default(const char *opt, const char *arg)
2901 {
2902     av_log_set_callback(log_callback_help);
2903     show_usage();
2904     show_help_options(options, "Main options:", 0, OPT_EXPERT, 0);
2905     show_help_options(options, "Advanced options:", OPT_EXPERT, 0, 0);
2906     printf("\n");
2907     show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
2908     show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
2909 #if !CONFIG_AVFILTER
2910     show_help_children(sws_get_class(), AV_OPT_FLAG_ENCODING_PARAM);
2911 #endif
2912     printf("\nWhile playing:\n"
2913            "q, ESC              quit\n"
2914            "f                   toggle full screen\n"
2915            "p, SPC              pause\n"
2916            "a                   cycle audio channel\n"
2917            "v                   cycle video channel\n"
2918            "t                   cycle subtitle channel\n"
2919            "w                   show audio waves\n"
2920            "s                   activate frame-step mode\n"
2921            "left/right          seek backward/forward 10 seconds\n"
2922            "down/up             seek backward/forward 1 minute\n"
2923            "mouse click         seek to percentage in file corresponding to fraction of width\n"
2924            );
2925 }
2926
2927 static void opt_input_file(void *optctx, const char *filename)
2928 {
2929     if (input_filename) {
2930         fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
2931                 filename, input_filename);
2932         exit(1);
2933     }
2934     if (!strcmp(filename, "-"))
2935         filename = "pipe:";
2936     input_filename = filename;
2937 }
2938
2939 /* Called from the main */
2940 int main(int argc, char **argv)
2941 {
2942     int flags;
2943
2944     av_log_set_flags(AV_LOG_SKIP_REPEATED);
2945     parse_loglevel(argc, argv, options);
2946
2947     /* register all codecs, demux and protocols */
2948     avcodec_register_all();
2949 #if CONFIG_AVDEVICE
2950     avdevice_register_all();
2951 #endif
2952 #if CONFIG_AVFILTER
2953     avfilter_register_all();
2954 #endif
2955     av_register_all();
2956     avformat_network_init();
2957
2958     init_opts();
2959
2960     show_banner();
2961
2962     parse_options(NULL, argc, argv, options, opt_input_file);
2963
2964     if (!input_filename) {
2965         show_usage();
2966         fprintf(stderr, "An input file must be specified\n");
2967         fprintf(stderr, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
2968         exit(1);
2969     }
2970
2971     if (display_disable) {
2972         video_disable = 1;
2973     }
2974     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
2975 #if !defined(__MINGW32__) && !defined(__APPLE__)
2976     flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */
2977 #endif
2978     if (SDL_Init (flags)) {
2979         fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError());
2980         exit(1);
2981     }
2982
2983     if (!display_disable) {
2984         const SDL_VideoInfo *vi = SDL_GetVideoInfo();
2985         fs_screen_width = vi->current_w;
2986         fs_screen_height = vi->current_h;
2987     }
2988
2989     SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
2990     SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
2991     SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
2992
2993     av_init_packet(&flush_pkt);
2994     flush_pkt.data = (uint8_t *)&flush_pkt;
2995
2996     cur_stream = stream_open(input_filename, file_iformat);
2997
2998     event_loop();
2999
3000     /* never returns */
3001
3002     return 0;
3003 }