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
  26 #include "config.h"
  27 #include "mp_msg.h"
  28 #include "help_mp.h"
  29 #include "av_opts.h"
  30
  31 #include "stream/stream.h"
  32 #include "demuxer.h"
  33 #include "stheader.h"
  34 #include "m_option.h"
  35 #include "libvo/sub.h"
  36
  37 #include "libavformat/avformat.h"
  38 #include "libavformat/avio.h"
  39 #include "libavutil/avutil.h"
  40 #include "libavcodec/opt.h"
  41
  42 #include "mp_taglists.h"
  43
  44 #define PROBE_BUF_SIZE (32*1024)
  45
  46 extern char *audio_lang;
  47 extern char *dvdsub_lang;
  48 extern int dvdsub_id;
  49 static unsigned int opt_probesize = 0;
  50 static unsigned int opt_analyzeduration = 0;
  51 static char *opt_format;
  52 static char *opt_cryptokey;
  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     int probe_data_size;
 137
 138     if(!demuxer->priv)
 139         demuxer->priv=calloc(sizeof(lavf_priv_t),1);
 140     priv= demuxer->priv;
 141
 142     av_register_all();
 143
 144     if (opt_format) {
 145         if (strcmp(opt_format, "help") == 0) {
 146            list_formats();
 147            return 0;
 148         }
 149         priv->avif= av_find_input_format(opt_format);
 150         if (!priv->avif) {
 151             mp_msg(MSGT_DEMUX,MSGL_FATAL,"Unknown lavf format %s\n", opt_format);
 152             return 0;
 153         }
 154         mp_msg(MSGT_DEMUX,MSGL_INFO,"Forced lavf %s demuxer\n", priv->avif->long_name);
 155         return DEMUXER_TYPE_LAVF;
 156     }
 157
 158     probe_data_size = stream_read(demuxer->stream, buf, PROBE_BUF_SIZE);
 159     if(probe_data_size <= 0)
 160         return 0;
 161     avpd.filename= demuxer->stream->url;
 162     avpd.buf= buf;
 163     avpd.buf_size= probe_data_size;
 164
 165     priv->avif= av_probe_input_format(&avpd, 1);
 166     if(!priv->avif){
 167         mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: no clue about this gibberish!\n");
 168         return 0;
 169     }else
 170         mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: %s\n", priv->avif->long_name);
 171
 172     return DEMUXER_TYPE_LAVF;
 173 }
 174
 175 static const char * const preferred_list[] = {
 176     "dxa",
 177     "flv",
 178     "gxf",
 179     "nut",
 180     "nuv",
 181     "mov,mp4,m4a,3gp,3g2,mj2",
 182     "mpc",
 183     "mpc8",
 184     "mxf",
 185     "swf",
 186     "vqf",
 187     "w64",
 188     "wv",
 189     NULL
 190 };
 191
 192 static int lavf_check_preferred_file(demuxer_t *demuxer){
 193     if (lavf_check_file(demuxer)) {
 194         const char * const *p = preferred_list;
 195         lavf_priv_t *priv = demuxer->priv;
 196         while (*p) {
 197             if (strcmp(*p, priv->avif->name) == 0)
 198                 return DEMUXER_TYPE_LAVF_PREFERRED;
 199             p++;
 200         }
 201     }
 202     return 0;
 203 }
 204
 205 static uint8_t char2int(char c) {
 206     if (c >= '0' && c <= '9') return c - '0';
 207     if (c >= 'a' && c <= 'f') return c - 'a' + 10;
 208     if (c >= 'A' && c <= 'F') return c - 'A' + 10;
 209     return 0;
 210 }
 211
 212 static void parse_cryptokey(AVFormatContext *avfc, const char *str) {
 213     int len = strlen(str) / 2;
 214     uint8_t *key = av_mallocz(len);
 215     int i;
 216     avfc->keylen = len;
 217     avfc->key = key;
 218     for (i = 0; i < len; i++, str += 2)
 219         *key++ = (char2int(str[0]) << 4) | char2int(str[1]);
 220 }
 221
 222 static void handle_stream(demuxer_t *demuxer, AVFormatContext *avfc, int i) {
 223     lavf_priv_t *priv= demuxer->priv;
 224     AVStream *st= avfc->streams[i];
 225     AVCodecContext *codec= st->codec;
 226     AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL, 0);
 227     int g, override_tag = av_codec_get_tag(mp_codecid_override_taglists,
 228                                            codec->codec_id);
 229     // For some formats (like PCM) always trust CODEC_ID_* more than codec_tag
 230     if (override_tag)
 231         codec->codec_tag = override_tag;
 232
 233     switch(codec->codec_type){
 234         case CODEC_TYPE_AUDIO:{
 235             WAVEFORMATEX *wf;
 236             sh_audio_t* sh_audio;
 237             sh_audio=new_sh_audio(demuxer, i);
 238             mp_msg(MSGT_DEMUX, MSGL_INFO, MSGTR_AudioID, "lavf", i);
 239             if(!sh_audio)
 240                 break;
 241             priv->astreams[priv->audio_streams] = i;
 242             priv->audio_streams++;
 243             wf= calloc(sizeof(WAVEFORMATEX) + codec->extradata_size, 1);
 244             // mp4a tag is used for all mp4 files no matter what they actually contain
 245             if(codec->codec_tag == MKTAG('m', 'p', '4', 'a'))
 246                 codec->codec_tag= 0;
 247             if(!codec->codec_tag)
 248                 codec->codec_tag= av_codec_get_tag(mp_wav_taglists, codec->codec_id);
 249             wf->wFormatTag= codec->codec_tag;
 250             wf->nChannels= codec->channels;
 251             wf->nSamplesPerSec= codec->sample_rate;
 252             wf->nAvgBytesPerSec= codec->bit_rate/8;
 253             wf->nBlockAlign= codec->block_align ? codec->block_align : 1;
 254             wf->wBitsPerSample= codec->bits_per_coded_sample;
 255             wf->cbSize= codec->extradata_size;
 256             if(codec->extradata_size)
 257                 memcpy(wf + 1, codec->extradata, codec->extradata_size);
 258             sh_audio->wf= wf;
 259             sh_audio->audio.dwSampleSize= codec->block_align;
 260             if(codec->frame_size && codec->sample_rate){
 261                 sh_audio->audio.dwScale=codec->frame_size;
 262                 sh_audio->audio.dwRate= codec->sample_rate;
 263             }else{
 264                 sh_audio->audio.dwScale= codec->block_align ? codec->block_align*8 : 8;
 265                 sh_audio->audio.dwRate = codec->bit_rate;
 266             }
 267             g= av_gcd(sh_audio->audio.dwScale, sh_audio->audio.dwRate);
 268             sh_audio->audio.dwScale /= g;
 269             sh_audio->audio.dwRate  /= g;
 270 //          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);
 271             sh_audio->ds= demuxer->audio;
 272             sh_audio->format= codec->codec_tag;
 273             sh_audio->channels= codec->channels;
 274             sh_audio->samplerate= codec->sample_rate;
 275             sh_audio->i_bps= codec->bit_rate/8;
 276             switch (codec->codec_id) {
 277                 case CODEC_ID_PCM_S8:
 278                 case CODEC_ID_PCM_U8:
 279                     sh_audio->samplesize = 1;
 280                     break;
 281                 case CODEC_ID_PCM_S16LE:
 282                 case CODEC_ID_PCM_S16BE:
 283                 case CODEC_ID_PCM_U16LE:
 284                 case CODEC_ID_PCM_U16BE:
 285                     sh_audio->samplesize = 2;
 286                     break;
 287                 case CODEC_ID_PCM_ALAW:
 288                     sh_audio->format = 0x6;
 289                     break;
 290                 case CODEC_ID_PCM_MULAW:
 291                     sh_audio->format = 0x7;
 292                     break;
 293             }
 294             if (lang && lang->value) {
 295               sh_audio->lang = strdup(lang->value);
 296               mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AID_%d_LANG=%s\n", i, sh_audio->lang);
 297             }
 298             if (st->disposition & AV_DISPOSITION_DEFAULT)
 299               sh_audio->default_track = 1;
 300             if(mp_msg_test(MSGT_HEADER,MSGL_V) ) print_wave_header(sh_audio->wf, MSGL_V);
 301             // select the first audio stream
 302             if (!demuxer->audio->sh) {
 303                 demuxer->audio->id = i;
 304                 demuxer->audio->sh= demuxer->a_streams[i];
 305             } else
 306                 st->discard= AVDISCARD_ALL;
 307             break;
 308         }
 309         case CODEC_TYPE_VIDEO:{
 310             sh_video_t* sh_video;
 311             BITMAPINFOHEADER *bih;
 312             sh_video=new_sh_video(demuxer, i);
 313             mp_msg(MSGT_DEMUX, MSGL_INFO, MSGTR_VideoID, "lavf", i);
 314             if(!sh_video) break;
 315             priv->vstreams[priv->video_streams] = i;
 316             priv->video_streams++;
 317             bih=calloc(sizeof(BITMAPINFOHEADER) + codec->extradata_size,1);
 318
 319             if(codec->codec_id == CODEC_ID_RAWVIDEO) {
 320                 switch (codec->pix_fmt) {
 321                     case PIX_FMT_RGB24:
 322                         codec->codec_tag= MKTAG(24, 'B', 'G', 'R');
 323                 }
 324             }
 325             if(!codec->codec_tag)
 326                 codec->codec_tag= av_codec_get_tag(mp_bmp_taglists, codec->codec_id);
 327             bih->biSize= sizeof(BITMAPINFOHEADER) + codec->extradata_size;
 328             bih->biWidth= codec->width;
 329             bih->biHeight= codec->height;
 330             bih->biBitCount= codec->bits_per_coded_sample;
 331             bih->biSizeImage = bih->biWidth * bih->biHeight * bih->biBitCount/8;
 332             bih->biCompression= codec->codec_tag;
 333             sh_video->bih= bih;
 334             sh_video->disp_w= codec->width;
 335             sh_video->disp_h= codec->height;
 336             if (st->time_base.den) { /* if container has time_base, use that */
 337                 sh_video->video.dwRate= st->time_base.den;
 338                 sh_video->video.dwScale= st->time_base.num;
 339             } else {
 340                 sh_video->video.dwRate= codec->time_base.den;
 341                 sh_video->video.dwScale= codec->time_base.num;
 342             }
 343             sh_video->fps=av_q2d(st->r_frame_rate);
 344             sh_video->frametime=1/av_q2d(st->r_frame_rate);
 345             sh_video->format=bih->biCompression;
 346             if(st->sample_aspect_ratio.num)
 347                 sh_video->aspect = codec->width  * st->sample_aspect_ratio.num
 348                          / (float)(codec->height * st->sample_aspect_ratio.den);
 349             else
 350                 sh_video->aspect=codec->width  * codec->sample_aspect_ratio.num
 351                        / (float)(codec->height * codec->sample_aspect_ratio.den);
 352             sh_video->i_bps=codec->bit_rate/8;
 353             mp_msg(MSGT_DEMUX,MSGL_DBG2,"aspect= %d*%d/(%d*%d)\n",
 354                 codec->width, codec->sample_aspect_ratio.num,
 355                 codec->height, codec->sample_aspect_ratio.den);
 356
 357             sh_video->ds= demuxer->video;
 358             if(codec->extradata_size)
 359                 memcpy(sh_video->bih + 1, codec->extradata, codec->extradata_size);
 360             if( mp_msg_test(MSGT_HEADER,MSGL_V) ) print_video_header(sh_video->bih, MSGL_V);
 361             /*
 362                 short biPlanes;
 363                 int  biXPelsPerMeter;
 364                 int  biYPelsPerMeter;
 365                 int biClrUsed;
 366                 int biClrImportant;
 367             */
 368             if(demuxer->video->id != i && demuxer->video->id != -1)
 369                 st->discard= AVDISCARD_ALL;
 370             else{
 371                 demuxer->video->id = i;
 372                 demuxer->video->sh= demuxer->v_streams[i];
 373             }
 374             break;
 375         }
 376         case CODEC_TYPE_SUBTITLE:{
 377             sh_sub_t* sh_sub;
 378             char type;
 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 if(codec->codec_id == CODEC_ID_DVB_TELETEXT)
 389                 type = 'd';
 390             else
 391                 break;
 392             sh_sub = new_sh_sub_sid(demuxer, i, priv->sub_streams);
 393             mp_msg(MSGT_DEMUX, MSGL_INFO, MSGTR_SubtitleID, "lavf", priv->sub_streams);
 394             if(!sh_sub) break;
 395             priv->sstreams[priv->sub_streams] = i;
 396             sh_sub->type = type;
 397             if (codec->extradata_size) {
 398                 sh_sub->extradata = malloc(codec->extradata_size);
 399                 memcpy(sh_sub->extradata, codec->extradata, codec->extradata_size);
 400                 sh_sub->extradata_len = codec->extradata_size;
 401             }
 402             if (lang && lang->value) {
 403               sh_sub->lang = strdup(lang->value);
 404               mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SID_%d_LANG=%s\n", priv->sub_streams, sh_sub->lang);
 405             }
 406             if (st->disposition & AV_DISPOSITION_DEFAULT)
 407               sh_sub->default_track = 1;
 408             priv->sub_streams++;
 409             break;
 410         }
 411         case CODEC_TYPE_ATTACHMENT:{
 412             if (st->codec->codec_id == CODEC_ID_TTF)
 413                 demuxer_add_attachment(demuxer, st->filename,
 414                                        "application/x-truetype-font",
 415                                        codec->extradata, codec->extradata_size);
 416             break;
 417         }
 418         default:
 419             st->discard= AVDISCARD_ALL;
 420     }
 421 }
 422
 423 static demuxer_t* demux_open_lavf(demuxer_t *demuxer){
 424     AVFormatContext *avfc;
 425     AVFormatParameters ap;
 426     const AVOption *opt;
 427     AVMetadataTag *t = NULL;
 428     lavf_priv_t *priv= demuxer->priv;
 429     int i;
 430     char mp_filename[256]="mp:";
 431
 432     memset(&ap, 0, sizeof(AVFormatParameters));
 433
 434     stream_seek(demuxer->stream, 0);
 435
 436     avfc = av_alloc_format_context();
 437
 438     if (opt_cryptokey)
 439         parse_cryptokey(avfc, opt_cryptokey);
 440     if (user_correct_pts != 0)
 441         avfc->flags |= AVFMT_FLAG_GENPTS;
 442     if (index_mode == 0)
 443         avfc->flags |= AVFMT_FLAG_IGNIDX;
 444
 445     ap.prealloced_context = 1;
 446     if(opt_probesize) {
 447         opt = av_set_int(avfc, "probesize", opt_probesize);
 448         if(!opt) mp_msg(MSGT_HEADER,MSGL_ERR, "demux_lavf, couldn't set option probesize to %u\n", opt_probesize);
 449     }
 450     if(opt_analyzeduration) {
 451         opt = av_set_int(avfc, "analyzeduration", opt_analyzeduration * AV_TIME_BASE);
 452         if(!opt) mp_msg(MSGT_HEADER,MSGL_ERR, "demux_lavf, couldn't set option analyzeduration to %u\n", opt_analyzeduration);
 453     }
 454
 455     if(opt_avopt){
 456         if(parse_avopts(avfc, opt_avopt) < 0){
 457             mp_msg(MSGT_HEADER,MSGL_ERR, "Your options /%s/ look like gibberish to me pal\n", opt_avopt);
 458             return NULL;
 459         }
 460     }
 461
 462     if(demuxer->stream->url)
 463         strncpy(mp_filename + 3, demuxer->stream->url, sizeof(mp_filename)-3);
 464     else
 465         strncpy(mp_filename + 3, "foobar.dummy", sizeof(mp_filename)-3);
 466
 467     priv->pb = av_alloc_put_byte(priv->buffer, BIO_BUFFER_SIZE, 0,
 468                                  demuxer->stream, mp_read, NULL, mp_seek);
 469     priv->pb->is_streamed = !demuxer->stream->end_pos || (demuxer->stream->flags & STREAM_SEEK) != STREAM_SEEK;
 470
 471     if(av_open_input_stream(&avfc, priv->pb, mp_filename, priv->avif, &ap)<0){
 472         mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_open_input_stream() failed\n");
 473         return NULL;
 474     }
 475
 476     priv->avfc= avfc;
 477
 478     if(av_find_stream_info(avfc) < 0){
 479         mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_find_stream_info() failed\n");
 480         return NULL;
 481     }
 482
 483     /* Add metadata. */
 484     av_metadata_conv(avfc, NULL, avfc->iformat->metadata_conv);
 485     while((t = av_metadata_get(avfc->metadata, "", t, AV_METADATA_IGNORE_SUFFIX)))
 486         demux_info_add(demuxer, t->key, t->value);
 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         t = av_metadata_get(c->metadata, "title", NULL, 0);
 493         demuxer_add_chapter(demuxer, t ? t->value : NULL, start, end);
 494     }
 495
 496     for(i=0; i<avfc->nb_streams; i++)
 497         handle_stream(demuxer, avfc, i);
 498     if(avfc->nb_programs) {
 499         int p;
 500         for (p = 0; p < avfc->nb_programs; p++) {
 501             AVProgram *program = avfc->programs[p];
 502             t = av_metadata_get(program->metadata, "title", NULL, 0);
 503             mp_msg(MSGT_HEADER,MSGL_INFO,"LAVF: Program %d %s\n", program->id, t ? t->value : "");
 504         }
 505     }
 506
 507     mp_msg(MSGT_HEADER,MSGL_V,"LAVF: %d audio and %d video streams found\n",priv->audio_streams,priv->video_streams);
 508     mp_msg(MSGT_HEADER,MSGL_V,"LAVF: build %d\n", LIBAVFORMAT_BUILD);
 509     if(!priv->audio_streams) demuxer->audio->id=-2;  // nosound
 510 //    else if(best_audio > 0 && demuxer->audio->id == -1) demuxer->audio->id=best_audio;
 511     if(!priv->video_streams){
 512         if(!priv->audio_streams){
 513             mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF: no audio or video headers found - broken file?\n");
 514             return NULL;
 515         }
 516         demuxer->video->id=-2; // audio-only
 517     } //else if (best_video > 0 && demuxer->video->id == -1) demuxer->video->id = best_video;
 518
 519     return demuxer;
 520 }
 521
 522 static int demux_lavf_fill_buffer(demuxer_t *demux, demux_stream_t *dsds){
 523     lavf_priv_t *priv= demux->priv;
 524     AVPacket pkt;
 525     demux_packet_t *dp;
 526     demux_stream_t *ds;
 527     int id;
 528     mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_lavf_fill_buffer()\n");
 529
 530     demux->filepos=stream_tell(demux->stream);
 531
 532     if(av_read_frame(priv->avfc, &pkt) < 0)
 533         return 0;
 534
 535     id= pkt.stream_index;
 536
 537     if(id==demux->audio->id){
 538         // audio
 539         ds=demux->audio;
 540         if(!ds->sh){
 541             ds->sh=demux->a_streams[id];
 542             mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF audio ID = %d\n",ds->id);
 543         }
 544     } else if(id==demux->video->id){
 545         // video
 546         ds=demux->video;
 547         if(!ds->sh){
 548             ds->sh=demux->v_streams[id];
 549             mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF video ID = %d\n",ds->id);
 550         }
 551     } else if(id==demux->sub->id){
 552         // subtitle
 553         ds=demux->sub;
 554         sub_utf8=1;
 555     } else {
 556         av_free_packet(&pkt);
 557         return 1;
 558     }
 559
 560     if(0/*pkt.destruct == av_destruct_packet*/){
 561         //ok kids, dont try this at home :)
 562         dp=malloc(sizeof(demux_packet_t));
 563         dp->len=pkt.size;
 564         dp->next=NULL;
 565         dp->refcount=1;
 566         dp->master=NULL;
 567         dp->buffer=pkt.data;
 568         pkt.destruct= NULL;
 569     }else{
 570         dp=new_demux_packet(pkt.size);
 571         memcpy(dp->buffer, pkt.data, pkt.size);
 572         av_free_packet(&pkt);
 573     }
 574
 575     if(pkt.pts != AV_NOPTS_VALUE){
 576         dp->pts=pkt.pts * av_q2d(priv->avfc->streams[id]->time_base);
 577         priv->last_pts= dp->pts * AV_TIME_BASE;
 578         if(pkt.convergence_duration)
 579             dp->endpts = dp->pts + pkt.convergence_duration * av_q2d(priv->avfc->streams[id]->time_base);
 580     }
 581     dp->pos=demux->filepos;
 582     dp->flags= !!(pkt.flags&PKT_FLAG_KEY);
 583     // append packet to DS stream:
 584     ds_add_packet(ds,dp);
 585     return 1;
 586 }
 587
 588 static void demux_seek_lavf(demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags){
 589     lavf_priv_t *priv = demuxer->priv;
 590     int avsflags = 0;
 591     mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_seek_lavf(%p, %f, %f, %d)\n", demuxer, rel_seek_secs, audio_delay, flags);
 592
 593     if (flags & SEEK_ABSOLUTE) {
 594       priv->last_pts = priv->avfc->start_time;
 595     } else {
 596       if (rel_seek_secs < 0) avsflags = AVSEEK_FLAG_BACKWARD;
 597     }
 598     if (flags & SEEK_FACTOR) {
 599       if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 600         return;
 601       priv->last_pts += rel_seek_secs * priv->avfc->duration;
 602     } else {
 603       priv->last_pts += rel_seek_secs * AV_TIME_BASE;
 604     }
 605     if (av_seek_frame(priv->avfc, -1, priv->last_pts, avsflags) < 0) {
 606         avsflags ^= AVSEEK_FLAG_BACKWARD;
 607         av_seek_frame(priv->avfc, -1, priv->last_pts, avsflags);
 608     }
 609 }
 610
 611 static int demux_lavf_control(demuxer_t *demuxer, int cmd, void *arg)
 612 {
 613     lavf_priv_t *priv = demuxer->priv;
 614
 615     switch (cmd) {
 616         case DEMUXER_CTRL_CORRECT_PTS:
 617             return DEMUXER_CTRL_OK;
 618         case DEMUXER_CTRL_GET_TIME_LENGTH:
 619             if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 620                 return DEMUXER_CTRL_DONTKNOW;
 621
 622             *((double *)arg) = (double)priv->avfc->duration / AV_TIME_BASE;
 623             return DEMUXER_CTRL_OK;
 624
 625         case DEMUXER_CTRL_GET_PERCENT_POS:
 626             if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 627                 return DEMUXER_CTRL_DONTKNOW;
 628
 629             *((int *)arg) = (int)((priv->last_pts - priv->avfc->start_time)*100 / priv->avfc->duration);
 630             return DEMUXER_CTRL_OK;
 631         case DEMUXER_CTRL_SWITCH_AUDIO:
 632         case DEMUXER_CTRL_SWITCH_VIDEO:
 633         {
 634             int id = *((int*)arg);
 635             int newid = -2;
 636             int i, curridx = -1;
 637             int nstreams, *pstreams;
 638             demux_stream_t *ds;
 639
 640             if(cmd == DEMUXER_CTRL_SWITCH_VIDEO)
 641             {
 642                 ds = demuxer->video;
 643                 nstreams = priv->video_streams;
 644                 pstreams = priv->vstreams;
 645             }
 646             else
 647             {
 648                 ds = demuxer->audio;
 649                 nstreams = priv->audio_streams;
 650                 pstreams = priv->astreams;
 651             }
 652             for(i = 0; i < nstreams; i++)
 653             {
 654                 if(pstreams[i] == ds->id) //current stream id
 655                 {
 656                     curridx = i;
 657                     break;
 658                 }
 659             }
 660
 661             if(id == -2) { // no sound
 662                 i = -1;
 663             } else if(id == -1) { // next track
 664                 i = (curridx + 2) % (nstreams + 1) - 1;
 665                 if (i >= 0)
 666                     newid = pstreams[i];
 667             }
 668             else // select track by id
 669             {
 670                 for(i = 0; i < nstreams; i++)
 671                 {
 672                     if(pstreams[i] == id)
 673                     {
 674                         newid = id;
 675                         break;
 676                     }
 677                 }
 678             }
 679             if(i == curridx)
 680                 return DEMUXER_CTRL_NOTIMPL;
 681             else
 682             {
 683                 ds_free_packs(ds);
 684                 if(ds->id >= 0)
 685                     priv->avfc->streams[ds->id]->discard = AVDISCARD_ALL;
 686                 *((int*)arg) = ds->id = newid;
 687                 if(newid >= 0)
 688                     priv->avfc->streams[newid]->discard = AVDISCARD_NONE;
 689                 return DEMUXER_CTRL_OK;
 690             }
 691         }
 692         case DEMUXER_CTRL_IDENTIFY_PROGRAM:
 693         {
 694             demux_program_t *prog = arg;
 695             AVProgram *program;
 696             int p, i;
 697             int start;
 698
 699             prog->vid = prog->aid = prog->sid = -2;     //no audio and no video by default
 700             if(priv->avfc->nb_programs < 1)
 701                 return DEMUXER_CTRL_DONTKNOW;
 702
 703             if(prog->progid == -1)
 704             {
 705                 p = 0;
 706                 while(p<priv->avfc->nb_programs && priv->avfc->programs[p]->id != priv->cur_program)
 707                     p++;
 708                 p = (p + 1) % priv->avfc->nb_programs;
 709             }
 710             else
 711             {
 712                 for(i=0; i<priv->avfc->nb_programs; i++)
 713                     if(priv->avfc->programs[i]->id == prog->progid)
 714                         break;
 715                 if(i==priv->avfc->nb_programs)
 716                     return DEMUXER_CTRL_DONTKNOW;
 717                 p = i;
 718             }
 719             start = p;
 720 redo:
 721             program = priv->avfc->programs[p];
 722             for(i=0; i<program->nb_stream_indexes; i++)
 723             {
 724                 switch(priv->avfc->streams[program->stream_index[i]]->codec->codec_type)
 725                 {
 726                     case CODEC_TYPE_VIDEO:
 727                         if(prog->vid == -2)
 728                             prog->vid = program->stream_index[i];
 729                         break;
 730                     case CODEC_TYPE_AUDIO:
 731                         if(prog->aid == -2)
 732                             prog->aid = program->stream_index[i];
 733                         break;
 734                     case CODEC_TYPE_SUBTITLE:
 735                         if(prog->sid == -2 && priv->avfc->streams[program->stream_index[i]]->codec->codec_id == CODEC_ID_TEXT)
 736                             prog->sid = program->stream_index[i];
 737                         break;
 738                 }
 739             }
 740             if(prog->progid == -1 && prog->vid == -2 && prog->aid == -2)
 741             {
 742                 p = (p + 1) % priv->avfc->nb_programs;
 743                 if (p == start)
 744                     return DEMUXER_CTRL_DONTKNOW;
 745                 goto redo;
 746             }
 747             priv->cur_program = prog->progid = program->id;
 748             return DEMUXER_CTRL_OK;
 749         }
 750         default:
 751             return DEMUXER_CTRL_NOTIMPL;
 752     }
 753 }
 754
 755 static void demux_close_lavf(demuxer_t *demuxer)
 756 {
 757     lavf_priv_t* priv = demuxer->priv;
 758     if (priv){
 759         if(priv->avfc)
 760        {
 761          av_freep(&priv->avfc->key);
 762          av_close_input_stream(priv->avfc);
 763         }
 764         av_freep(&priv->pb);
 765         free(priv); demuxer->priv= NULL;
 766     }
 767 }
 768
 769
 770 const demuxer_desc_t demuxer_desc_lavf = {
 771   "libavformat demuxer",
 772   "lavf",
 773   "libavformat",
 774   "Michael Niedermayer",
 775   "supports many formats, requires libavformat",
 776   DEMUXER_TYPE_LAVF,
 777   0, // Check after other demuxer
 778   lavf_check_file,
 779   demux_lavf_fill_buffer,
 780   demux_open_lavf,
 781   demux_close_lavf,
 782   demux_seek_lavf,
 783   demux_lavf_control
 784 };
 785
 786 const demuxer_desc_t demuxer_desc_lavf_preferred = {
 787   "libavformat preferred demuxer",
 788   "lavfpref",
 789   "libavformat",
 790   "Michael Niedermayer",
 791   "supports many formats, requires libavformat",
 792   DEMUXER_TYPE_LAVF_PREFERRED,
 793   1,
 794   lavf_check_preferred_file,
 795   demux_lavf_fill_buffer,
 796   demux_open_lavf,
 797   demux_close_lavf,
 798   demux_seek_lavf,
 799   demux_lavf_control
 800 };