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[FFMAX(BIO_BUFFER_SIZE, PROBE_BUF_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     lavf_priv_t *priv;
 135     int probe_data_size;
 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 (opt_format) {
 144         if (strcmp(opt_format, "help") == 0) {
 145            list_formats();
 146            return 0;
 147         }
 148         priv->avif= av_find_input_format(opt_format);
 149         if (!priv->avif) {
 150             mp_msg(MSGT_DEMUX,MSGL_FATAL,"Unknown lavf format %s\n", opt_format);
 151             return 0;
 152         }
 153         mp_msg(MSGT_DEMUX,MSGL_INFO,"Forced lavf %s demuxer\n", priv->avif->long_name);
 154         return DEMUXER_TYPE_LAVF;
 155     }
 156
 157     probe_data_size = stream_read(demuxer->stream, priv->buffer, PROBE_BUF_SIZE);
 158     if(probe_data_size <= 0)
 159         return 0;
 160     avpd.filename= demuxer->stream->url;
 161     avpd.buf= priv->buffer;
 162     avpd.buf_size= probe_data_size;
 163
 164     priv->avif= av_probe_input_format(&avpd, 1);
 165     if(!priv->avif){
 166         mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: no clue about this gibberish!\n");
 167         return 0;
 168     }else
 169         mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: %s\n", priv->avif->long_name);
 170
 171     return DEMUXER_TYPE_LAVF;
 172 }
 173
 174 static const char * const preferred_list[] = {
 175     "dxa",
 176     "flv",
 177     "gxf",
 178     "nut",
 179     "nuv",
 180     "mov,mp4,m4a,3gp,3g2,mj2",
 181     "mpc",
 182     "mpc8",
 183     "mxf",
 184     "swf",
 185     "vqf",
 186     "w64",
 187     "wv",
 188     NULL
 189 };
 190
 191 static int lavf_check_preferred_file(demuxer_t *demuxer){
 192     if (lavf_check_file(demuxer)) {
 193         const char * const *p = preferred_list;
 194         lavf_priv_t *priv = demuxer->priv;
 195         while (*p) {
 196             if (strcmp(*p, priv->avif->name) == 0)
 197                 return DEMUXER_TYPE_LAVF_PREFERRED;
 198             p++;
 199         }
 200     }
 201     return 0;
 202 }
 203
 204 static uint8_t char2int(char c) {
 205     if (c >= '0' && c <= '9') return c - '0';
 206     if (c >= 'a' && c <= 'f') return c - 'a' + 10;
 207     if (c >= 'A' && c <= 'F') return c - 'A' + 10;
 208     return 0;
 209 }
 210
 211 static void parse_cryptokey(AVFormatContext *avfc, const char *str) {
 212     int len = strlen(str) / 2;
 213     uint8_t *key = av_mallocz(len);
 214     int i;
 215     avfc->keylen = len;
 216     avfc->key = key;
 217     for (i = 0; i < len; i++, str += 2)
 218         *key++ = (char2int(str[0]) << 4) | char2int(str[1]);
 219 }
 220
 221 static void handle_stream(demuxer_t *demuxer, AVFormatContext *avfc, int i) {
 222     lavf_priv_t *priv= demuxer->priv;
 223     AVStream *st= avfc->streams[i];
 224     AVCodecContext *codec= st->codec;
 225     AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL, 0);
 226     int g, override_tag = av_codec_get_tag(mp_codecid_override_taglists,
 227                                            codec->codec_id);
 228     // For some formats (like PCM) always trust CODEC_ID_* more than codec_tag
 229     if (override_tag)
 230         codec->codec_tag = override_tag;
 231
 232     switch(codec->codec_type){
 233         case CODEC_TYPE_AUDIO:{
 234             WAVEFORMATEX *wf;
 235             sh_audio_t* sh_audio;
 236             sh_audio=new_sh_audio(demuxer, i);
 237             mp_msg(MSGT_DEMUX, MSGL_INFO, MSGTR_AudioID, "lavf", i);
 238             if(!sh_audio)
 239                 break;
 240             priv->astreams[priv->audio_streams] = i;
 241             priv->audio_streams++;
 242             wf= calloc(sizeof(WAVEFORMATEX) + codec->extradata_size, 1);
 243             // mp4a tag is used for all mp4 files no matter what they actually contain
 244             if(codec->codec_tag == MKTAG('m', 'p', '4', 'a'))
 245                 codec->codec_tag= 0;
 246             if(!codec->codec_tag)
 247                 codec->codec_tag= av_codec_get_tag(mp_wav_taglists, codec->codec_id);
 248             wf->wFormatTag= codec->codec_tag;
 249             wf->nChannels= codec->channels;
 250             wf->nSamplesPerSec= codec->sample_rate;
 251             wf->nAvgBytesPerSec= codec->bit_rate/8;
 252             wf->nBlockAlign= codec->block_align ? codec->block_align : 1;
 253             wf->wBitsPerSample= codec->bits_per_coded_sample;
 254             wf->cbSize= codec->extradata_size;
 255             if(codec->extradata_size)
 256                 memcpy(wf + 1, codec->extradata, codec->extradata_size);
 257             sh_audio->wf= wf;
 258             sh_audio->audio.dwSampleSize= codec->block_align;
 259             if(codec->frame_size && codec->sample_rate){
 260                 sh_audio->audio.dwScale=codec->frame_size;
 261                 sh_audio->audio.dwRate= codec->sample_rate;
 262             }else{
 263                 sh_audio->audio.dwScale= codec->block_align ? codec->block_align*8 : 8;
 264                 sh_audio->audio.dwRate = codec->bit_rate;
 265             }
 266             g= av_gcd(sh_audio->audio.dwScale, sh_audio->audio.dwRate);
 267             sh_audio->audio.dwScale /= g;
 268             sh_audio->audio.dwRate  /= g;
 269 //          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);
 270             sh_audio->ds= demuxer->audio;
 271             sh_audio->format= codec->codec_tag;
 272             sh_audio->channels= codec->channels;
 273             sh_audio->samplerate= codec->sample_rate;
 274             sh_audio->i_bps= codec->bit_rate/8;
 275             switch (codec->codec_id) {
 276                 case CODEC_ID_PCM_S8:
 277                 case CODEC_ID_PCM_U8:
 278                     sh_audio->samplesize = 1;
 279                     break;
 280                 case CODEC_ID_PCM_S16LE:
 281                 case CODEC_ID_PCM_S16BE:
 282                 case CODEC_ID_PCM_U16LE:
 283                 case CODEC_ID_PCM_U16BE:
 284                     sh_audio->samplesize = 2;
 285                     break;
 286                 case CODEC_ID_PCM_ALAW:
 287                     sh_audio->format = 0x6;
 288                     break;
 289                 case CODEC_ID_PCM_MULAW:
 290                     sh_audio->format = 0x7;
 291                     break;
 292             }
 293             if (lang && lang->value) {
 294               sh_audio->lang = strdup(lang->value);
 295               mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AID_%d_LANG=%s\n", i, sh_audio->lang);
 296             }
 297             if (st->disposition & AV_DISPOSITION_DEFAULT)
 298               sh_audio->default_track = 1;
 299             if(mp_msg_test(MSGT_HEADER,MSGL_V) ) print_wave_header(sh_audio->wf, MSGL_V);
 300             // select the first audio stream
 301             if (!demuxer->audio->sh) {
 302                 demuxer->audio->id = i;
 303                 demuxer->audio->sh= demuxer->a_streams[i];
 304             } else
 305                 st->discard= AVDISCARD_ALL;
 306             break;
 307         }
 308         case CODEC_TYPE_VIDEO:{
 309             sh_video_t* sh_video;
 310             BITMAPINFOHEADER *bih;
 311             sh_video=new_sh_video(demuxer, i);
 312             mp_msg(MSGT_DEMUX, MSGL_INFO, MSGTR_VideoID, "lavf", i);
 313             if(!sh_video) break;
 314             priv->vstreams[priv->video_streams] = i;
 315             priv->video_streams++;
 316             bih=calloc(sizeof(BITMAPINFOHEADER) + codec->extradata_size,1);
 317
 318             if(codec->codec_id == CODEC_ID_RAWVIDEO) {
 319                 switch (codec->pix_fmt) {
 320                     case PIX_FMT_RGB24:
 321                         codec->codec_tag= MKTAG(24, 'B', 'G', 'R');
 322                 }
 323             }
 324             if(!codec->codec_tag)
 325                 codec->codec_tag= av_codec_get_tag(mp_bmp_taglists, codec->codec_id);
 326             bih->biSize= sizeof(BITMAPINFOHEADER) + codec->extradata_size;
 327             bih->biWidth= codec->width;
 328             bih->biHeight= codec->height;
 329             bih->biBitCount= codec->bits_per_coded_sample;
 330             bih->biSizeImage = bih->biWidth * bih->biHeight * bih->biBitCount/8;
 331             bih->biCompression= codec->codec_tag;
 332             sh_video->bih= bih;
 333             sh_video->disp_w= codec->width;
 334             sh_video->disp_h= codec->height;
 335             if (st->time_base.den) { /* if container has time_base, use that */
 336                 sh_video->video.dwRate= st->time_base.den;
 337                 sh_video->video.dwScale= st->time_base.num;
 338             } else {
 339                 sh_video->video.dwRate= codec->time_base.den;
 340                 sh_video->video.dwScale= codec->time_base.num;
 341             }
 342             sh_video->fps=av_q2d(st->r_frame_rate);
 343             sh_video->frametime=1/av_q2d(st->r_frame_rate);
 344             sh_video->format=bih->biCompression;
 345             if(st->sample_aspect_ratio.num)
 346                 sh_video->aspect = codec->width  * st->sample_aspect_ratio.num
 347                          / (float)(codec->height * st->sample_aspect_ratio.den);
 348             else
 349                 sh_video->aspect=codec->width  * codec->sample_aspect_ratio.num
 350                        / (float)(codec->height * codec->sample_aspect_ratio.den);
 351             sh_video->i_bps=codec->bit_rate/8;
 352             mp_msg(MSGT_DEMUX,MSGL_DBG2,"aspect= %d*%d/(%d*%d)\n",
 353                 codec->width, codec->sample_aspect_ratio.num,
 354                 codec->height, codec->sample_aspect_ratio.den);
 355
 356             sh_video->ds= demuxer->video;
 357             if(codec->extradata_size)
 358                 memcpy(sh_video->bih + 1, codec->extradata, codec->extradata_size);
 359             if( mp_msg_test(MSGT_HEADER,MSGL_V) ) print_video_header(sh_video->bih, MSGL_V);
 360             /*
 361                 short biPlanes;
 362                 int  biXPelsPerMeter;
 363                 int  biYPelsPerMeter;
 364                 int biClrUsed;
 365                 int biClrImportant;
 366             */
 367             if(demuxer->video->id != i && demuxer->video->id != -1)
 368                 st->discard= AVDISCARD_ALL;
 369             else{
 370                 demuxer->video->id = i;
 371                 demuxer->video->sh= demuxer->v_streams[i];
 372             }
 373             break;
 374         }
 375         case CODEC_TYPE_SUBTITLE:{
 376             sh_sub_t* sh_sub;
 377             char type;
 378             /* only support text subtitles for now */
 379             if(codec->codec_id == CODEC_ID_TEXT)
 380                 type = 't';
 381             else if(codec->codec_id == CODEC_ID_MOV_TEXT)
 382                 type = 'm';
 383             else if(codec->codec_id == CODEC_ID_SSA)
 384                 type = 'a';
 385             else if(codec->codec_id == CODEC_ID_DVD_SUBTITLE)
 386                 type = 'v';
 387             else if(codec->codec_id == CODEC_ID_DVB_TELETEXT)
 388                 type = 'd';
 389             else
 390                 break;
 391             sh_sub = new_sh_sub_sid(demuxer, i, priv->sub_streams);
 392             mp_msg(MSGT_DEMUX, MSGL_INFO, MSGTR_SubtitleID, "lavf", priv->sub_streams);
 393             if(!sh_sub) break;
 394             priv->sstreams[priv->sub_streams] = i;
 395             sh_sub->type = type;
 396             if (codec->extradata_size) {
 397                 sh_sub->extradata = malloc(codec->extradata_size);
 398                 memcpy(sh_sub->extradata, codec->extradata, codec->extradata_size);
 399                 sh_sub->extradata_len = codec->extradata_size;
 400             }
 401             if (lang && lang->value) {
 402               sh_sub->lang = strdup(lang->value);
 403               mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SID_%d_LANG=%s\n", priv->sub_streams, sh_sub->lang);
 404             }
 405             if (st->disposition & AV_DISPOSITION_DEFAULT)
 406               sh_sub->default_track = 1;
 407             priv->sub_streams++;
 408             break;
 409         }
 410         case CODEC_TYPE_ATTACHMENT:{
 411             if (st->codec->codec_id == CODEC_ID_TTF)
 412                 demuxer_add_attachment(demuxer, st->filename,
 413                                        "application/x-truetype-font",
 414                                        codec->extradata, codec->extradata_size);
 415             break;
 416         }
 417         default:
 418             st->discard= AVDISCARD_ALL;
 419     }
 420 }
 421
 422 static demuxer_t* demux_open_lavf(demuxer_t *demuxer){
 423     AVFormatContext *avfc;
 424     AVFormatParameters ap;
 425     const AVOption *opt;
 426     AVMetadataTag *t = NULL;
 427     lavf_priv_t *priv= demuxer->priv;
 428     int i;
 429     char mp_filename[256]="mp:";
 430
 431     memset(&ap, 0, sizeof(AVFormatParameters));
 432
 433     stream_seek(demuxer->stream, 0);
 434
 435     avfc = avformat_alloc_context();
 436
 437     if (opt_cryptokey)
 438         parse_cryptokey(avfc, opt_cryptokey);
 439     if (user_correct_pts != 0)
 440         avfc->flags |= AVFMT_FLAG_GENPTS;
 441     if (index_mode == 0)
 442         avfc->flags |= AVFMT_FLAG_IGNIDX;
 443
 444     ap.prealloced_context = 1;
 445     if(opt_probesize) {
 446         opt = av_set_int(avfc, "probesize", opt_probesize);
 447         if(!opt) mp_msg(MSGT_HEADER,MSGL_ERR, "demux_lavf, couldn't set option probesize to %u\n", opt_probesize);
 448     }
 449     if(opt_analyzeduration) {
 450         opt = av_set_int(avfc, "analyzeduration", opt_analyzeduration * AV_TIME_BASE);
 451         if(!opt) mp_msg(MSGT_HEADER,MSGL_ERR, "demux_lavf, couldn't set option analyzeduration to %u\n", opt_analyzeduration);
 452     }
 453
 454     if(opt_avopt){
 455         if(parse_avopts(avfc, opt_avopt) < 0){
 456             mp_msg(MSGT_HEADER,MSGL_ERR, "Your options /%s/ look like gibberish to me pal\n", opt_avopt);
 457             return NULL;
 458         }
 459     }
 460
 461     if(demuxer->stream->url)
 462         strncpy(mp_filename + 3, demuxer->stream->url, sizeof(mp_filename)-3);
 463     else
 464         strncpy(mp_filename + 3, "foobar.dummy", sizeof(mp_filename)-3);
 465
 466     priv->pb = av_alloc_put_byte(priv->buffer, BIO_BUFFER_SIZE, 0,
 467                                  demuxer->stream, mp_read, NULL, mp_seek);
 468     priv->pb->is_streamed = !demuxer->stream->end_pos || (demuxer->stream->flags & MP_STREAM_SEEK) != MP_STREAM_SEEK;
 469
 470     if(av_open_input_stream(&avfc, priv->pb, mp_filename, priv->avif, &ap)<0){
 471         mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_open_input_stream() failed\n");
 472         return NULL;
 473     }
 474
 475     priv->avfc= avfc;
 476
 477     if(av_find_stream_info(avfc) < 0){
 478         mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_find_stream_info() failed\n");
 479         return NULL;
 480     }
 481
 482     /* Add metadata. */
 483     av_metadata_conv(avfc, NULL, avfc->iformat->metadata_conv);
 484     while((t = av_metadata_get(avfc->metadata, "", t, AV_METADATA_IGNORE_SUFFIX)))
 485         demux_info_add(demuxer, t->key, t->value);
 486
 487     for(i=0; i < avfc->nb_chapters; i++) {
 488         AVChapter *c = avfc->chapters[i];
 489         uint64_t start = av_rescale_q(c->start, c->time_base, (AVRational){1,1000});
 490         uint64_t end   = av_rescale_q(c->end, c->time_base, (AVRational){1,1000});
 491         t = av_metadata_get(c->metadata, "title", NULL, 0);
 492         demuxer_add_chapter(demuxer, t ? t->value : NULL, start, end);
 493     }
 494
 495     for(i=0; i<avfc->nb_streams; i++)
 496         handle_stream(demuxer, avfc, i);
 497     if(avfc->nb_programs) {
 498         int p;
 499         for (p = 0; p < avfc->nb_programs; p++) {
 500             AVProgram *program = avfc->programs[p];
 501             t = av_metadata_get(program->metadata, "title", NULL, 0);
 502             mp_msg(MSGT_HEADER,MSGL_INFO,"LAVF: Program %d %s\n", program->id, t ? t->value : "");
 503         }
 504     }
 505
 506     mp_msg(MSGT_HEADER,MSGL_V,"LAVF: %d audio and %d video streams found\n",priv->audio_streams,priv->video_streams);
 507     mp_msg(MSGT_HEADER,MSGL_V,"LAVF: build %d\n", LIBAVFORMAT_BUILD);
 508     if(!priv->audio_streams) demuxer->audio->id=-2;  // nosound
 509 //    else if(best_audio > 0 && demuxer->audio->id == -1) demuxer->audio->id=best_audio;
 510     if(!priv->video_streams){
 511         if(!priv->audio_streams){
 512             mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF: no audio or video headers found - broken file?\n");
 513             return NULL;
 514         }
 515         demuxer->video->id=-2; // audio-only
 516     } //else if (best_video > 0 && demuxer->video->id == -1) demuxer->video->id = best_video;
 517
 518     return demuxer;
 519 }
 520
 521 static int demux_lavf_fill_buffer(demuxer_t *demux, demux_stream_t *dsds){
 522     lavf_priv_t *priv= demux->priv;
 523     AVPacket pkt;
 524     demux_packet_t *dp;
 525     demux_stream_t *ds;
 526     int id;
 527     mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_lavf_fill_buffer()\n");
 528
 529     demux->filepos=stream_tell(demux->stream);
 530
 531     if(av_read_frame(priv->avfc, &pkt) < 0)
 532         return 0;
 533
 534     id= pkt.stream_index;
 535
 536     if(id==demux->audio->id){
 537         // audio
 538         ds=demux->audio;
 539         if(!ds->sh){
 540             ds->sh=demux->a_streams[id];
 541             mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF audio ID = %d\n",ds->id);
 542         }
 543     } else if(id==demux->video->id){
 544         // video
 545         ds=demux->video;
 546         if(!ds->sh){
 547             ds->sh=demux->v_streams[id];
 548             mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF video ID = %d\n",ds->id);
 549         }
 550     } else if(id==demux->sub->id){
 551         // subtitle
 552         ds=demux->sub;
 553         sub_utf8=1;
 554     } else {
 555         av_free_packet(&pkt);
 556         return 1;
 557     }
 558
 559     if(0/*pkt.destruct == av_destruct_packet*/){
 560         //ok kids, dont try this at home :)
 561         dp=malloc(sizeof(demux_packet_t));
 562         dp->len=pkt.size;
 563         dp->next=NULL;
 564         dp->refcount=1;
 565         dp->master=NULL;
 566         dp->buffer=pkt.data;
 567         pkt.destruct= NULL;
 568     }else{
 569         dp=new_demux_packet(pkt.size);
 570         memcpy(dp->buffer, pkt.data, pkt.size);
 571         av_free_packet(&pkt);
 572     }
 573
 574     if(pkt.pts != AV_NOPTS_VALUE){
 575         dp->pts=pkt.pts * av_q2d(priv->avfc->streams[id]->time_base);
 576         priv->last_pts= dp->pts * AV_TIME_BASE;
 577         if(pkt.convergence_duration)
 578             dp->endpts = dp->pts + pkt.convergence_duration * av_q2d(priv->avfc->streams[id]->time_base);
 579     }
 580     dp->pos=demux->filepos;
 581     dp->flags= !!(pkt.flags&PKT_FLAG_KEY);
 582     // append packet to DS stream:
 583     ds_add_packet(ds,dp);
 584     return 1;
 585 }
 586
 587 static void demux_seek_lavf(demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags){
 588     lavf_priv_t *priv = demuxer->priv;
 589     int avsflags = 0;
 590     mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_seek_lavf(%p, %f, %f, %d)\n", demuxer, rel_seek_secs, audio_delay, flags);
 591
 592     if (flags & SEEK_ABSOLUTE) {
 593       priv->last_pts = priv->avfc->start_time;
 594     } else {
 595       if (rel_seek_secs < 0) avsflags = AVSEEK_FLAG_BACKWARD;
 596     }
 597     if (flags & SEEK_FACTOR) {
 598       if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 599         return;
 600       priv->last_pts += rel_seek_secs * priv->avfc->duration;
 601     } else {
 602       priv->last_pts += rel_seek_secs * AV_TIME_BASE;
 603     }
 604     if (av_seek_frame(priv->avfc, -1, priv->last_pts, avsflags) < 0) {
 605         avsflags ^= AVSEEK_FLAG_BACKWARD;
 606         av_seek_frame(priv->avfc, -1, priv->last_pts, avsflags);
 607     }
 608 }
 609
 610 static int demux_lavf_control(demuxer_t *demuxer, int cmd, void *arg)
 611 {
 612     lavf_priv_t *priv = demuxer->priv;
 613
 614     switch (cmd) {
 615         case DEMUXER_CTRL_CORRECT_PTS:
 616             return DEMUXER_CTRL_OK;
 617         case DEMUXER_CTRL_GET_TIME_LENGTH:
 618             if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 619                 return DEMUXER_CTRL_DONTKNOW;
 620
 621             *((double *)arg) = (double)priv->avfc->duration / AV_TIME_BASE;
 622             return DEMUXER_CTRL_OK;
 623
 624         case DEMUXER_CTRL_GET_PERCENT_POS:
 625             if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 626                 return DEMUXER_CTRL_DONTKNOW;
 627
 628             *((int *)arg) = (int)((priv->last_pts - priv->avfc->start_time)*100 / priv->avfc->duration);
 629             return DEMUXER_CTRL_OK;
 630         case DEMUXER_CTRL_SWITCH_AUDIO:
 631         case DEMUXER_CTRL_SWITCH_VIDEO:
 632         {
 633             int id = *((int*)arg);
 634             int newid = -2;
 635             int i, curridx = -1;
 636             int nstreams, *pstreams;
 637             demux_stream_t *ds;
 638
 639             if(cmd == DEMUXER_CTRL_SWITCH_VIDEO)
 640             {
 641                 ds = demuxer->video;
 642                 nstreams = priv->video_streams;
 643                 pstreams = priv->vstreams;
 644             }
 645             else
 646             {
 647                 ds = demuxer->audio;
 648                 nstreams = priv->audio_streams;
 649                 pstreams = priv->astreams;
 650             }
 651             for(i = 0; i < nstreams; i++)
 652             {
 653                 if(pstreams[i] == ds->id) //current stream id
 654                 {
 655                     curridx = i;
 656                     break;
 657                 }
 658             }
 659
 660             if(id == -2) { // no sound
 661                 i = -1;
 662             } else if(id == -1) { // next track
 663                 i = (curridx + 2) % (nstreams + 1) - 1;
 664                 if (i >= 0)
 665                     newid = pstreams[i];
 666             }
 667             else // select track by id
 668             {
 669                 for(i = 0; i < nstreams; i++)
 670                 {
 671                     if(pstreams[i] == id)
 672                     {
 673                         newid = id;
 674                         break;
 675                     }
 676                 }
 677             }
 678             if(i == curridx)
 679                 return DEMUXER_CTRL_NOTIMPL;
 680             else
 681             {
 682                 ds_free_packs(ds);
 683                 if(ds->id >= 0)
 684                     priv->avfc->streams[ds->id]->discard = AVDISCARD_ALL;
 685                 *((int*)arg) = ds->id = newid;
 686                 if(newid >= 0)
 687                     priv->avfc->streams[newid]->discard = AVDISCARD_NONE;
 688                 return DEMUXER_CTRL_OK;
 689             }
 690         }
 691         case DEMUXER_CTRL_IDENTIFY_PROGRAM:
 692         {
 693             demux_program_t *prog = arg;
 694             AVProgram *program;
 695             int p, i;
 696             int start;
 697
 698             prog->vid = prog->aid = prog->sid = -2;     //no audio and no video by default
 699             if(priv->avfc->nb_programs < 1)
 700                 return DEMUXER_CTRL_DONTKNOW;
 701
 702             if(prog->progid == -1)
 703             {
 704                 p = 0;
 705                 while(p<priv->avfc->nb_programs && priv->avfc->programs[p]->id != priv->cur_program)
 706                     p++;
 707                 p = (p + 1) % priv->avfc->nb_programs;
 708             }
 709             else
 710             {
 711                 for(i=0; i<priv->avfc->nb_programs; i++)
 712                     if(priv->avfc->programs[i]->id == prog->progid)
 713                         break;
 714                 if(i==priv->avfc->nb_programs)
 715                     return DEMUXER_CTRL_DONTKNOW;
 716                 p = i;
 717             }
 718             start = p;
 719 redo:
 720             program = priv->avfc->programs[p];
 721             for(i=0; i<program->nb_stream_indexes; i++)
 722             {
 723                 switch(priv->avfc->streams[program->stream_index[i]]->codec->codec_type)
 724                 {
 725                     case CODEC_TYPE_VIDEO:
 726                         if(prog->vid == -2)
 727                             prog->vid = program->stream_index[i];
 728                         break;
 729                     case CODEC_TYPE_AUDIO:
 730                         if(prog->aid == -2)
 731                             prog->aid = program->stream_index[i];
 732                         break;
 733                     case CODEC_TYPE_SUBTITLE:
 734                         if(prog->sid == -2 && priv->avfc->streams[program->stream_index[i]]->codec->codec_id == CODEC_ID_TEXT)
 735                             prog->sid = program->stream_index[i];
 736                         break;
 737                 }
 738             }
 739             if(prog->progid == -1 && prog->vid == -2 && prog->aid == -2)
 740             {
 741                 p = (p + 1) % priv->avfc->nb_programs;
 742                 if (p == start)
 743                     return DEMUXER_CTRL_DONTKNOW;
 744                 goto redo;
 745             }
 746             priv->cur_program = prog->progid = program->id;
 747             return DEMUXER_CTRL_OK;
 748         }
 749         default:
 750             return DEMUXER_CTRL_NOTIMPL;
 751     }
 752 }
 753
 754 static void demux_close_lavf(demuxer_t *demuxer)
 755 {
 756     lavf_priv_t* priv = demuxer->priv;
 757     if (priv){
 758         if(priv->avfc)
 759        {
 760          av_freep(&priv->avfc->key);
 761          av_close_input_stream(priv->avfc);
 762         }
 763         av_freep(&priv->pb);
 764         free(priv); demuxer->priv= NULL;
 765     }
 766 }
 767
 768
 769 const demuxer_desc_t demuxer_desc_lavf = {
 770   "libavformat demuxer",
 771   "lavf",
 772   "libavformat",
 773   "Michael Niedermayer",
 774   "supports many formats, requires libavformat",
 775   DEMUXER_TYPE_LAVF,
 776   0, // Check after other demuxer
 777   lavf_check_file,
 778   demux_lavf_fill_buffer,
 779   demux_open_lavf,
 780   demux_close_lavf,
 781   demux_seek_lavf,
 782   demux_lavf_control
 783 };
 784
 785 const demuxer_desc_t demuxer_desc_lavf_preferred = {
 786   "libavformat preferred demuxer",
 787   "lavfpref",
 788   "libavformat",
 789   "Michael Niedermayer",
 790   "supports many formats, requires libavformat",
 791   DEMUXER_TYPE_LAVF_PREFERRED,
 792   1,
 793   lavf_check_preferred_file,
 794   demux_lavf_fill_buffer,
 795   demux_open_lavf,
 796   demux_close_lavf,
 797   demux_seek_lavf,
 798   demux_lavf_control
 799 };