libmpdemux/demux_lavf.c

   1 /*
   2  * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 // #include <stdio.h>
  22 #include <stdlib.h>
  23 // #include <unistd.h>
  24 #include <limits.h>
  25 #include <stdbool.h>
  26
  27 #include "config.h"
  28 #include "options.h"
  29 #include "mp_msg.h"
  30 #include "help_mp.h"
  31 #include "av_opts.h"
  32
  33 #include "stream/stream.h"
  34 #include "demuxer.h"
  35 #include "stheader.h"
  36 #include "m_option.h"
  37 #include "libvo/sub.h"
  38
  39 #include "libavformat/avformat.h"
  40 #include "libavformat/avio.h"
  41 #include "libavutil/avutil.h"
  42 #include "libavcodec/opt.h"
  43
  44 #include "mp_taglists.h"
  45
  46 #define PROBE_BUF_SIZE (32*1024)
  47
  48 static unsigned int opt_probesize = 0;
  49 static unsigned int opt_analyzeduration = 0;
  50 static char *opt_format;
  51 static char *opt_cryptokey;
  52 extern int ts_prog;
  53 static char *opt_avopt = NULL;
  54
  55 const m_option_t lavfdopts_conf[] = {
  56         {"probesize", &(opt_probesize), CONF_TYPE_INT, CONF_RANGE, 32, INT_MAX, NULL},
  57         {"format",    &(opt_format),    CONF_TYPE_STRING,       0,  0,       0, NULL},
  58         {"analyzeduration",    &(opt_analyzeduration),    CONF_TYPE_INT,       CONF_RANGE,  0,       INT_MAX, NULL},
  59         {"cryptokey", &(opt_cryptokey), CONF_TYPE_STRING,       0,  0,       0, NULL},
  60         {"o",                  &opt_avopt,                CONF_TYPE_STRING,    0,           0,             0, NULL},
  61         {NULL, NULL, 0, 0, 0, 0, NULL}
  62 };
  63
  64 #define BIO_BUFFER_SIZE 32768
  65
  66 typedef struct lavf_priv_t{
  67     AVInputFormat *avif;
  68     AVFormatContext *avfc;
  69     ByteIOContext *pb;
  70     uint8_t buffer[BIO_BUFFER_SIZE];
  71     int audio_streams;
  72     int video_streams;
  73     int sub_streams;
  74     int64_t last_pts;
  75     int astreams[MAX_A_STREAMS];
  76     int vstreams[MAX_V_STREAMS];
  77     int sstreams[MAX_S_STREAMS];
  78     int cur_program;
  79 }lavf_priv_t;
  80
  81 void print_wave_header(WAVEFORMATEX *h, int verbose_level);
  82 void print_video_header(BITMAPINFOHEADER *h, int verbose_level);
  83
  84 static int mp_read(void *opaque, uint8_t *buf, int size) {
  85     stream_t *stream = opaque;
  86     int ret;
  87
  88     if(stream_eof(stream)) //needed?
  89         return -1;
  90     ret=stream_read(stream, buf, size);
  91
  92     mp_msg(MSGT_HEADER,MSGL_DBG2,"%d=mp_read(%p, %p, %d), eof:%d\n", ret, stream, buf, size, stream->eof);
  93     return ret;
  94 }
  95
  96 static int64_t mp_seek(void *opaque, int64_t pos, int whence) {
  97     stream_t *stream = opaque;
  98     int64_t current_pos;
  99     mp_msg(MSGT_HEADER,MSGL_DBG2,"mp_seek(%p, %d, %d)\n", stream, (int)pos, whence);
 100     if(whence == SEEK_CUR)
 101         pos +=stream_tell(stream);
 102     else if(whence == SEEK_END && stream->end_pos > 0)
 103         pos += stream->end_pos;
 104     else if(whence == SEEK_SET)
 105         pos += stream->start_pos;
 106     else if(whence == AVSEEK_SIZE && stream->end_pos > 0)
 107         return stream->end_pos - stream->start_pos;
 108     else
 109         return -1;
 110
 111     if(pos<0)
 112         return -1;
 113     if(pos<stream->end_pos && stream->eof)
 114         stream_reset(stream);
 115     current_pos = stream_tell(stream);
 116     if(stream_seek(stream, pos)==0) {
 117         stream_reset(stream);
 118         stream_seek(stream, current_pos);
 119         return -1;
 120     }
 121
 122     return pos - stream->start_pos;
 123 }
 124
 125 static void list_formats(void) {
 126     AVInputFormat *fmt;
 127     mp_msg(MSGT_DEMUX, MSGL_INFO, "Available lavf input formats:\n");
 128     for (fmt = first_iformat; fmt; fmt = fmt->next)
 129         mp_msg(MSGT_DEMUX, MSGL_INFO, "%15s : %s\n", fmt->name, fmt->long_name);
 130 }
 131
 132 static int lavf_check_file(demuxer_t *demuxer){
 133     AVProbeData avpd;
 134     uint8_t buf[PROBE_BUF_SIZE];
 135     lavf_priv_t *priv;
 136
 137     if(!demuxer->priv)
 138         demuxer->priv=calloc(sizeof(lavf_priv_t),1);
 139     priv= demuxer->priv;
 140
 141     av_register_all();
 142
 143     if(stream_read(demuxer->stream, buf, PROBE_BUF_SIZE)!=PROBE_BUF_SIZE)
 144         return 0;
 145     avpd.filename= demuxer->stream->url;
 146     avpd.buf= buf;
 147     avpd.buf_size= PROBE_BUF_SIZE;
 148
 149     if (opt_format) {
 150         if (strcmp(opt_format, "help") == 0) {
 151            list_formats();
 152            return 0;
 153         }
 154         priv->avif= av_find_input_format(opt_format);
 155         if (!priv->avif) {
 156             mp_msg(MSGT_DEMUX,MSGL_FATAL,"Unknown lavf format %s\n", opt_format);
 157             return 0;
 158         }
 159         mp_msg(MSGT_DEMUX,MSGL_INFO,"Forced lavf %s demuxer\n", priv->avif->long_name);
 160         return DEMUXER_TYPE_LAVF;
 161     }
 162     priv->avif= av_probe_input_format(&avpd, 1);
 163     if(!priv->avif){
 164         mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: no clue about this gibberish!\n");
 165         return 0;
 166     }else
 167         mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: %s\n", priv->avif->long_name);
 168
 169     return DEMUXER_TYPE_LAVF;
 170 }
 171
 172 static const char *preferred_list[] = {
 173     "dxa",
 174     "wv",
 175     "nuv",
 176     "nut",
 177     "gxf",
 178     "mxf",
 179     "flv",
 180     "swf",
 181     "mov,mp4,m4a,3gp,3g2,mj2",
 182     "mpc",
 183     "mpc8",
 184     NULL
 185 };
 186
 187 static int lavf_check_preferred_file(demuxer_t *demuxer){
 188     if (lavf_check_file(demuxer)) {
 189         char **p = preferred_list;
 190         lavf_priv_t *priv = demuxer->priv;
 191         while (*p) {
 192             if (strcmp(*p, priv->avif->name) == 0)
 193                 return DEMUXER_TYPE_LAVF_PREFERRED;
 194             p++;
 195         }
 196     }
 197     return 0;
 198 }
 199
 200 static uint8_t char2int(char c) {
 201     if (c >= '0' && c <= '9') return c - '0';
 202     if (c >= 'a' && c <= 'f') return c - 'a' + 10;
 203     if (c >= 'A' && c <= 'F') return c - 'A' + 10;
 204     return 0;
 205 }
 206
 207 static void parse_cryptokey(AVFormatContext *avfc, const char *str) {
 208     int len = strlen(str) / 2;
 209     uint8_t *key = av_mallocz(len);
 210     int i;
 211     avfc->keylen = len;
 212     avfc->key = key;
 213     for (i = 0; i < len; i++, str += 2)
 214         *key++ = (char2int(str[0]) << 4) | char2int(str[1]);
 215 }
 216
 217 static void handle_stream(demuxer_t *demuxer, AVFormatContext *avfc, int i) {
 218     lavf_priv_t *priv= demuxer->priv;
 219     AVStream *st= avfc->streams[i];
 220     AVCodecContext *codec= st->codec;
 221     int g;
 222
 223     switch(codec->codec_type){
 224         case CODEC_TYPE_AUDIO:{
 225             int override_tag;
 226             WAVEFORMATEX *wf= calloc(sizeof(WAVEFORMATEX) + codec->extradata_size, 1);
 227             sh_audio_t* sh_audio;
 228             if(priv->audio_streams >= MAX_A_STREAMS)
 229                 break;
 230             sh_audio=new_sh_audio(demuxer, i);
 231             mp_tmsg(MSGT_DEMUX, MSGL_INFO, "[%s] Audio stream found, -aid %d\n", "lavf", i);
 232             if(!sh_audio)
 233                 break;
 234             priv->astreams[priv->audio_streams] = i;
 235             priv->audio_streams++;
 236             // For some formats (like PCM) always trust CODEC_ID_* more than codec_tag
 237             override_tag= av_codec_get_tag(mp_wav_override_taglists, codec->codec_id);
 238             if (override_tag)
 239                 codec->codec_tag= override_tag;
 240             // mp4a tag is used for all mp4 files no matter what they actually contain
 241             if(codec->codec_tag == MKTAG('m', 'p', '4', 'a'))
 242                 codec->codec_tag= 0;
 243             if(codec->codec_id == CODEC_ID_ADPCM_IMA_AMV)
 244                 codec->codec_tag= MKTAG('A','M','V','A');
 245             if(!codec->codec_tag)
 246                 codec->codec_tag= av_codec_get_tag(mp_wav_taglists, codec->codec_id);
 247             wf->wFormatTag= codec->codec_tag;
 248             wf->nChannels= codec->channels;
 249             wf->nSamplesPerSec= codec->sample_rate;
 250             wf->nAvgBytesPerSec= codec->bit_rate/8;
 251             wf->nBlockAlign= codec->block_align ? codec->block_align : 1;
 252             wf->wBitsPerSample= codec->bits_per_coded_sample;
 253             wf->cbSize= codec->extradata_size;
 254             if(codec->extradata_size)
 255                 memcpy(wf + 1, codec->extradata, codec->extradata_size);
 256             sh_audio->wf= wf;
 257             sh_audio->audio.dwSampleSize= codec->block_align;
 258             if(codec->frame_size && codec->sample_rate){
 259                 sh_audio->audio.dwScale=codec->frame_size;
 260                 sh_audio->audio.dwRate= codec->sample_rate;
 261             }else{
 262                 sh_audio->audio.dwScale= codec->block_align ? codec->block_align*8 : 8;
 263                 sh_audio->audio.dwRate = codec->bit_rate;
 264             }
 265             g= av_gcd(sh_audio->audio.dwScale, sh_audio->audio.dwRate);
 266             sh_audio->audio.dwScale /= g;
 267             sh_audio->audio.dwRate  /= g;
 268 //          printf("sca:%d rat:%d fs:%d sr:%d ba:%d\n", sh_audio->audio.dwScale, sh_audio->audio.dwRate, codec->frame_size, codec->sample_rate, codec->block_align);
 269             sh_audio->ds= demuxer->audio;
 270             sh_audio->format= codec->codec_tag;
 271             sh_audio->channels= codec->channels;
 272             sh_audio->samplerate= codec->sample_rate;
 273             sh_audio->i_bps= codec->bit_rate/8;
 274             switch (codec->codec_id) {
 275                 case CODEC_ID_PCM_S8:
 276                 case CODEC_ID_PCM_U8:
 277                     sh_audio->samplesize = 1;
 278                     break;
 279                 case CODEC_ID_PCM_S16LE:
 280                 case CODEC_ID_PCM_S16BE:
 281                 case CODEC_ID_PCM_U16LE:
 282                 case CODEC_ID_PCM_U16BE:
 283                     sh_audio->samplesize = 2;
 284                     break;
 285                 case CODEC_ID_PCM_ALAW:
 286                     sh_audio->format = 0x6;
 287                     break;
 288                 case CODEC_ID_PCM_MULAW:
 289                     sh_audio->format = 0x7;
 290                     break;
 291             }
 292             if (st->language)
 293               sh_audio->lang = strdup(st->language);
 294             if (st->disposition & AV_DISPOSITION_DEFAULT)
 295               sh_audio->default_track = 1;
 296             if(mp_msg_test(MSGT_HEADER,MSGL_V) ) print_wave_header(sh_audio->wf, MSGL_V);
 297             // select the first audio stream
 298             if (!demuxer->audio->sh) {
 299                 demuxer->audio->id = i;
 300                 demuxer->audio->sh= demuxer->a_streams[i];
 301             } else
 302                 st->discard= AVDISCARD_ALL;
 303             break;
 304         }
 305         case CODEC_TYPE_VIDEO:{
 306             sh_video_t* sh_video;
 307             BITMAPINFOHEADER *bih;
 308             if(priv->video_streams >= MAX_V_STREAMS)
 309                 break;
 310             sh_video=new_sh_video(demuxer, i);
 311             mp_tmsg(MSGT_DEMUX, MSGL_INFO, "[%s] Video stream found, -vid %d\n", "lavf", i);
 312             if(!sh_video) break;
 313             priv->vstreams[priv->video_streams] = i;
 314             priv->video_streams++;
 315             bih=calloc(sizeof(BITMAPINFOHEADER) + codec->extradata_size,1);
 316
 317             if(codec->codec_id == CODEC_ID_RAWVIDEO) {
 318                 switch (codec->pix_fmt) {
 319                     case PIX_FMT_RGB24:
 320                         codec->codec_tag= MKTAG(24, 'B', 'G', 'R');
 321                 }
 322             }
 323             if(!codec->codec_tag)
 324                 codec->codec_tag= av_codec_get_tag(mp_bmp_taglists, codec->codec_id);
 325             bih->biSize= sizeof(BITMAPINFOHEADER) + codec->extradata_size;
 326             bih->biWidth= codec->width;
 327             bih->biHeight= codec->height;
 328             bih->biBitCount= codec->bits_per_coded_sample;
 329             bih->biSizeImage = bih->biWidth * bih->biHeight * bih->biBitCount/8;
 330             bih->biCompression= codec->codec_tag;
 331             sh_video->bih= bih;
 332             sh_video->disp_w= codec->width;
 333             sh_video->disp_h= codec->height;
 334             if (st->time_base.den) { /* if container has time_base, use that */
 335                 sh_video->video.dwRate= st->time_base.den;
 336                 sh_video->video.dwScale= st->time_base.num;
 337             } else {
 338                 sh_video->video.dwRate= codec->time_base.den;
 339                 sh_video->video.dwScale= codec->time_base.num;
 340             }
 341             sh_video->fps=av_q2d(st->r_frame_rate);
 342             sh_video->frametime=1/av_q2d(st->r_frame_rate);
 343             sh_video->format=bih->biCompression;
 344             if(st->sample_aspect_ratio.num)
 345                 sh_video->aspect = codec->width  * st->sample_aspect_ratio.num
 346                          / (float)(codec->height * st->sample_aspect_ratio.den);
 347             else
 348                 sh_video->aspect=codec->width  * codec->sample_aspect_ratio.num
 349                        / (float)(codec->height * codec->sample_aspect_ratio.den);
 350             sh_video->i_bps=codec->bit_rate/8;
 351             mp_msg(MSGT_DEMUX,MSGL_DBG2,"aspect= %d*%d/(%d*%d)\n",
 352                 codec->width, codec->sample_aspect_ratio.num,
 353                 codec->height, codec->sample_aspect_ratio.den);
 354
 355             sh_video->ds= demuxer->video;
 356             if(codec->extradata_size)
 357                 memcpy(sh_video->bih + 1, codec->extradata, codec->extradata_size);
 358             if( mp_msg_test(MSGT_HEADER,MSGL_V) ) print_video_header(sh_video->bih, MSGL_V);
 359             /*
 360                 short biPlanes;
 361                 int  biXPelsPerMeter;
 362                 int  biYPelsPerMeter;
 363                 int biClrUsed;
 364                 int biClrImportant;
 365             */
 366             if(demuxer->video->id != i && demuxer->video->id != -1)
 367                 st->discard= AVDISCARD_ALL;
 368             else{
 369                 demuxer->video->id = i;
 370                 demuxer->video->sh= demuxer->v_streams[i];
 371             }
 372             break;
 373         }
 374         case CODEC_TYPE_SUBTITLE:{
 375             sh_sub_t* sh_sub;
 376             char type;
 377             if(priv->sub_streams >= MAX_S_STREAMS)
 378                 break;
 379             /* only support text subtitles for now */
 380             if(codec->codec_id == CODEC_ID_TEXT)
 381                 type = 't';
 382             else if(codec->codec_id == CODEC_ID_MOV_TEXT)
 383                 type = 'm';
 384             else if(codec->codec_id == CODEC_ID_SSA)
 385                 type = 'a';
 386             else if(codec->codec_id == CODEC_ID_DVD_SUBTITLE)
 387                 type = 'v';
 388             else
 389                 break;
 390             sh_sub = new_sh_sub_sid(demuxer, i, priv->sub_streams);
 391             mp_tmsg(MSGT_DEMUX, MSGL_INFO, "[%s] Subtitle stream found, -sid %d\n", "lavf", priv->sub_streams);
 392             if(!sh_sub) break;
 393             priv->sstreams[priv->sub_streams] = i;
 394             sh_sub->type = type;
 395             if (codec->extradata_size) {
 396                 sh_sub->extradata = malloc(codec->extradata_size);
 397                 memcpy(sh_sub->extradata, codec->extradata, codec->extradata_size);
 398                 sh_sub->extradata_len = codec->extradata_size;
 399             }
 400             if (st->language)
 401               sh_sub->lang = strdup(st->language);
 402             if (st->disposition & AV_DISPOSITION_DEFAULT)
 403               sh_sub->default_track = 1;
 404             priv->sub_streams++;
 405             break;
 406         }
 407         case CODEC_TYPE_ATTACHMENT:{
 408             if (st->codec->codec_id == CODEC_ID_TTF)
 409                 demuxer_add_attachment(demuxer, st->filename,
 410                                        "application/x-truetype-font",
 411                                        codec->extradata, codec->extradata_size);
 412             break;
 413         }
 414         default:
 415             st->discard= AVDISCARD_ALL;
 416     }
 417 }
 418
 419 static demuxer_t* demux_open_lavf(demuxer_t *demuxer){
 420     struct MPOpts *opts = demuxer->opts;
 421     AVFormatContext *avfc;
 422     AVFormatParameters ap;
 423     const AVOption *opt;
 424     lavf_priv_t *priv= demuxer->priv;
 425     int i;
 426     char mp_filename[256]="mp:";
 427
 428     memset(&ap, 0, sizeof(AVFormatParameters));
 429
 430     stream_seek(demuxer->stream, 0);
 431
 432     avfc = av_alloc_format_context();
 433
 434     if (opt_cryptokey)
 435         parse_cryptokey(avfc, opt_cryptokey);
 436     if (opts->user_correct_pts != 0)
 437         avfc->flags |= AVFMT_FLAG_GENPTS;
 438     if (index_mode == 0)
 439         avfc->flags |= AVFMT_FLAG_IGNIDX;
 440
 441     ap.prealloced_context = 1;
 442     if(opt_probesize) {
 443         opt = av_set_int(avfc, "probesize", opt_probesize);
 444         if(!opt) mp_msg(MSGT_HEADER,MSGL_ERR, "demux_lavf, couldn't set option probesize to %u\n", opt_probesize);
 445     }
 446     if(opt_analyzeduration) {
 447         opt = av_set_int(avfc, "analyzeduration", opt_analyzeduration * AV_TIME_BASE);
 448         if(!opt) mp_msg(MSGT_HEADER,MSGL_ERR, "demux_lavf, couldn't set option analyzeduration to %u\n", opt_analyzeduration);
 449     }
 450
 451     if(opt_avopt){
 452         if(parse_avopts(avfc, opt_avopt) < 0){
 453             mp_msg(MSGT_HEADER,MSGL_ERR, "Your options /%s/ look like gibberish to me pal\n", opt_avopt);
 454             return NULL;
 455         }
 456     }
 457
 458     if(demuxer->stream->url)
 459         strncpy(mp_filename + 3, demuxer->stream->url, sizeof(mp_filename)-3);
 460     else
 461         strncpy(mp_filename + 3, "foobar.dummy", sizeof(mp_filename)-3);
 462
 463     priv->pb = av_alloc_put_byte(priv->buffer, BIO_BUFFER_SIZE, 0,
 464                                  demuxer->stream, mp_read, NULL, mp_seek);
 465     priv->pb->is_streamed = !demuxer->stream->end_pos || (demuxer->stream->flags & STREAM_SEEK) != STREAM_SEEK;
 466
 467     if(av_open_input_stream(&avfc, priv->pb, mp_filename, priv->avif, &ap)<0){
 468         mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_open_input_stream() failed\n");
 469         return NULL;
 470     }
 471
 472     priv->avfc= avfc;
 473
 474     if(av_find_stream_info(avfc) < 0){
 475         mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_find_stream_info() failed\n");
 476         return NULL;
 477     }
 478
 479     if(avfc->title    [0]) demux_info_add(demuxer, "name"     , avfc->title    );
 480     if(avfc->author   [0]) demux_info_add(demuxer, "author"   , avfc->author   );
 481     if(avfc->copyright[0]) demux_info_add(demuxer, "copyright", avfc->copyright);
 482     if(avfc->comment  [0]) demux_info_add(demuxer, "comments" , avfc->comment  );
 483     if(avfc->album    [0]) demux_info_add(demuxer, "album"    , avfc->album    );
 484 //    if(avfc->year        ) demux_info_add(demuxer, "year"     , avfc->year     );
 485 //    if(avfc->track       ) demux_info_add(demuxer, "track"    , avfc->track    );
 486     if(avfc->genre    [0]) demux_info_add(demuxer, "genre"    , avfc->genre    );
 487
 488     for(i=0; i < avfc->nb_chapters; i++) {
 489         AVChapter *c = avfc->chapters[i];
 490         uint64_t start = av_rescale_q(c->start, c->time_base, (AVRational){1,1000});
 491         uint64_t end   = av_rescale_q(c->end, c->time_base, (AVRational){1,1000});
 492         demuxer_add_chapter(demuxer, c->title, start, end);
 493     }
 494
 495     if(avfc->nb_programs) {
 496         int p, start=0, found=0;
 497
 498         if(ts_prog) {
 499             for(p=0; p<avfc->nb_programs; p++) {
 500                 if(avfc->programs[p]->id == ts_prog) {
 501                     start = p;
 502                     found = 1;
 503                     break;
 504                 }
 505             }
 506             if(!found) {
 507                 mp_msg(MSGT_HEADER,MSGL_ERR,"DEMUX_LAVF: program %d doesn't seem to be present\n", ts_prog);
 508                 return NULL;
 509             }
 510         }
 511         p = start;
 512         do {
 513             AVProgram *program = avfc->programs[p];
 514             mp_msg(MSGT_HEADER,MSGL_INFO,"LAVF: Program %d %s\n", program->id, (program->name ? program->name : ""));
 515             for(i=0; i<program->nb_stream_indexes; i++)
 516                 handle_stream(demuxer, avfc, program->stream_index[i]);
 517             if(!priv->cur_program && (demuxer->video->sh || demuxer->audio->sh))
 518                 priv->cur_program = program->id;
 519             p = (p + 1) % avfc->nb_programs;
 520         } while(p!=start);
 521     } else
 522         for(i=0; i<avfc->nb_streams; i++)
 523             handle_stream(demuxer, avfc, i);
 524
 525     mp_msg(MSGT_HEADER,MSGL_V,"LAVF: %d audio and %d video streams found\n",priv->audio_streams,priv->video_streams);
 526     mp_msg(MSGT_HEADER,MSGL_V,"LAVF: build %d\n", LIBAVFORMAT_BUILD);
 527     if(!priv->audio_streams) demuxer->audio->id=-2;  // nosound
 528 //    else if(best_audio > 0 && demuxer->audio->id == -1) demuxer->audio->id=best_audio;
 529     if(!priv->video_streams){
 530         if(!priv->audio_streams){
 531             mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF: no audio or video headers found - broken file?\n");
 532             return NULL;
 533         }
 534         demuxer->video->id=-2; // audio-only
 535     } //else if (best_video > 0 && demuxer->video->id == -1) demuxer->video->id = best_video;
 536
 537     demuxer->accurate_seek = true;
 538
 539     return demuxer;
 540 }
 541
 542 static int demux_lavf_fill_buffer(demuxer_t *demux, demux_stream_t *dsds){
 543     lavf_priv_t *priv= demux->priv;
 544     AVPacket pkt;
 545     demux_packet_t *dp;
 546     demux_stream_t *ds;
 547     int id;
 548     mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_lavf_fill_buffer()\n");
 549
 550     demux->filepos=stream_tell(demux->stream);
 551
 552     if(av_read_frame(priv->avfc, &pkt) < 0)
 553         return 0;
 554
 555     id= pkt.stream_index;
 556
 557     if(id==demux->audio->id){
 558         // audio
 559         ds=demux->audio;
 560         if(!ds->sh){
 561             ds->sh=demux->a_streams[id];
 562             mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF audio ID = %d\n",ds->id);
 563         }
 564     } else if(id==demux->video->id){
 565         // video
 566         ds=demux->video;
 567         if(!ds->sh){
 568             ds->sh=demux->v_streams[id];
 569             mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF video ID = %d\n",ds->id);
 570         }
 571     } else if(id==demux->sub->id){
 572         // subtitle
 573         ds=demux->sub;
 574         sub_utf8=1;
 575     } else {
 576         av_free_packet(&pkt);
 577         return 1;
 578     }
 579
 580     if(0/*pkt.destruct == av_destruct_packet*/){
 581         //ok kids, dont try this at home :)
 582         dp=malloc(sizeof(demux_packet_t));
 583         dp->len=pkt.size;
 584         dp->next=NULL;
 585         dp->refcount=1;
 586         dp->master=NULL;
 587         dp->buffer=pkt.data;
 588         pkt.destruct= NULL;
 589     }else{
 590         dp=new_demux_packet(pkt.size);
 591         memcpy(dp->buffer, pkt.data, pkt.size);
 592         av_free_packet(&pkt);
 593     }
 594
 595     if(pkt.pts != AV_NOPTS_VALUE){
 596         dp->pts=pkt.pts * av_q2d(priv->avfc->streams[id]->time_base);
 597         priv->last_pts= dp->pts * AV_TIME_BASE;
 598         if(pkt.convergence_duration)
 599             dp->endpts = dp->pts + pkt.convergence_duration * av_q2d(priv->avfc->streams[id]->time_base);
 600     }
 601     dp->pos=demux->filepos;
 602     dp->flags= !!(pkt.flags&PKT_FLAG_KEY);
 603     // append packet to DS stream:
 604     ds_add_packet(ds,dp);
 605     return 1;
 606 }
 607
 608 static void demux_seek_lavf(demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags){
 609     lavf_priv_t *priv = demuxer->priv;
 610     int avsflags = 0;
 611     mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_seek_lavf(%p, %f, %f, %d)\n", demuxer, rel_seek_secs, audio_delay, flags);
 612
 613     if (flags & SEEK_ABSOLUTE) {
 614       priv->last_pts = 0;
 615     } else {
 616       if (rel_seek_secs < 0) avsflags = AVSEEK_FLAG_BACKWARD;
 617     }
 618     if (flags & SEEK_FORWARD)
 619         avsflags = 0;
 620     else if (flags & SEEK_BACKWARD)
 621         avsflags = AVSEEK_FLAG_BACKWARD;
 622     if (flags & SEEK_FACTOR) {
 623       if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 624         return;
 625       priv->last_pts += rel_seek_secs * priv->avfc->duration;
 626     } else {
 627       priv->last_pts += rel_seek_secs * AV_TIME_BASE;
 628     }
 629     av_seek_frame(priv->avfc, -1, priv->last_pts, avsflags);
 630 }
 631
 632 static int demux_lavf_control(demuxer_t *demuxer, int cmd, void *arg)
 633 {
 634     lavf_priv_t *priv = demuxer->priv;
 635
 636     switch (cmd) {
 637         case DEMUXER_CTRL_CORRECT_PTS:
 638             return DEMUXER_CTRL_OK;
 639         case DEMUXER_CTRL_GET_TIME_LENGTH:
 640             if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 641                 return DEMUXER_CTRL_DONTKNOW;
 642
 643             *((double *)arg) = (double)priv->avfc->duration / AV_TIME_BASE;
 644             return DEMUXER_CTRL_OK;
 645
 646         case DEMUXER_CTRL_GET_PERCENT_POS:
 647             if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 648                 return DEMUXER_CTRL_DONTKNOW;
 649
 650             *((int *)arg) = (int)((priv->last_pts - priv->avfc->start_time)*100 / priv->avfc->duration);
 651             return DEMUXER_CTRL_OK;
 652         case DEMUXER_CTRL_SWITCH_AUDIO:
 653         case DEMUXER_CTRL_SWITCH_VIDEO:
 654         {
 655             int id = *((int*)arg);
 656             int newid = -2;
 657             int i, curridx = -1;
 658             int nstreams, *pstreams;
 659             demux_stream_t *ds;
 660
 661             if(cmd == DEMUXER_CTRL_SWITCH_VIDEO)
 662             {
 663                 ds = demuxer->video;
 664                 nstreams = priv->video_streams;
 665                 pstreams = priv->vstreams;
 666             }
 667             else
 668             {
 669                 ds = demuxer->audio;
 670                 nstreams = priv->audio_streams;
 671                 pstreams = priv->astreams;
 672             }
 673             for(i = 0; i < nstreams; i++)
 674             {
 675                 if(pstreams[i] == ds->id) //current stream id
 676                 {
 677                     curridx = i;
 678                     break;
 679                 }
 680             }
 681
 682             if(id == -2) { // no sound
 683                 i = -1;
 684             } else if(id == -1) { // next track
 685                 i = (curridx + 2) % (nstreams + 1) - 1;
 686                 if (i >= 0)
 687                     newid = pstreams[i];
 688             }
 689             else // select track by id
 690             {
 691                 for(i = 0; i < nstreams; i++)
 692                 {
 693                     if(pstreams[i] == id)
 694                     {
 695                         newid = id;
 696                         break;
 697                     }
 698                 }
 699             }
 700             if(i == curridx)
 701                 return DEMUXER_CTRL_NOTIMPL;
 702             else
 703             {
 704                 ds_free_packs(ds);
 705                 if(ds->id >= 0)
 706                     priv->avfc->streams[ds->id]->discard = AVDISCARD_ALL;
 707                 *((int*)arg) = ds->id = newid;
 708                 if(newid >= 0)
 709                     priv->avfc->streams[newid]->discard = AVDISCARD_NONE;
 710                 return DEMUXER_CTRL_OK;
 711             }
 712         }
 713         case DEMUXER_CTRL_IDENTIFY_PROGRAM:
 714         {
 715             demux_program_t *prog = arg;
 716             AVProgram *program;
 717             int p, i;
 718
 719             if(priv->avfc->nb_programs < 2)
 720                 return DEMUXER_CTRL_NOTIMPL;
 721
 722             if(prog->progid == -1)
 723             {
 724                 p = 0;
 725                 while(p<priv->avfc->nb_programs && priv->avfc->programs[p]->id != priv->cur_program)
 726                     p++;
 727                 p = (p + 1) % priv->avfc->nb_programs;
 728             }
 729             else
 730             {
 731                 for(i=0; i<priv->avfc->nb_programs; i++)
 732                     if(priv->avfc->programs[i]->id == prog->progid)
 733                         break;
 734                 if(i==priv->avfc->nb_programs)
 735                     return DEMUXER_CTRL_NOTIMPL;
 736                 p = i;
 737             }
 738             prog->vid = prog->aid = prog->sid = -2;     //no audio and no video by default
 739 redo:
 740             program = priv->avfc->programs[p];
 741             for(i=0; i<program->nb_stream_indexes; i++)
 742             {
 743                 switch(priv->avfc->streams[program->stream_index[i]]->codec->codec_type)
 744                 {
 745                     case CODEC_TYPE_VIDEO:
 746                         if(prog->vid == -2)
 747                             prog->vid = program->stream_index[i];
 748                         break;
 749                     case CODEC_TYPE_AUDIO:
 750                         if(prog->aid == -2)
 751                             prog->aid = program->stream_index[i];
 752                         break;
 753                     case CODEC_TYPE_SUBTITLE:
 754                         if(prog->sid == -2 && priv->avfc->streams[program->stream_index[i]]->codec->codec_id == CODEC_ID_TEXT)
 755                             prog->sid = program->stream_index[i];
 756                         break;
 757                 }
 758             }
 759             if(prog->progid == -1 && prog->vid == -2 && prog->aid == -2)
 760             {
 761                 p = (p + 1) % priv->avfc->nb_programs;
 762                 goto redo;
 763             }
 764             priv->cur_program = prog->progid = program->id;
 765             return DEMUXER_CTRL_OK;
 766         }
 767         default:
 768             return DEMUXER_CTRL_NOTIMPL;
 769     }
 770 }
 771
 772 static void demux_close_lavf(demuxer_t *demuxer)
 773 {
 774     lavf_priv_t* priv = demuxer->priv;
 775     if (priv){
 776         if(priv->avfc)
 777        {
 778          av_freep(&priv->avfc->key);
 779          av_close_input_stream(priv->avfc);
 780         }
 781         av_freep(&priv->pb);
 782         free(priv); demuxer->priv= NULL;
 783     }
 784 }
 785
 786
 787 const demuxer_desc_t demuxer_desc_lavf = {
 788   "libavformat demuxer",
 789   "lavf",
 790   "libavformat",
 791   "Michael Niedermayer",
 792   "supports many formats, requires libavformat",
 793   DEMUXER_TYPE_LAVF,
 794   0, // Check after other demuxer
 795   lavf_check_file,
 796   demux_lavf_fill_buffer,
 797   demux_open_lavf,
 798   demux_close_lavf,
 799   demux_seek_lavf,
 800   demux_lavf_control
 801 };
 802
 803 const demuxer_desc_t demuxer_desc_lavf_preferred = {
 804   "libavformat preferred demuxer",
 805   "lavfpref",
 806   "libavformat",
 807   "Michael Niedermayer",
 808   "supports many formats, requires libavformat",
 809   DEMUXER_TYPE_LAVF_PREFERRED,
 810   1,
 811   lavf_check_preferred_file,
 812   demux_lavf_fill_buffer,
 813   demux_open_lavf,
 814   demux_close_lavf,
 815   demux_seek_lavf,
 816   demux_lavf_control
 817 };