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 "aviprint.h"
  33 #include "demuxer.h"
  34 #include "stheader.h"
  35 #include "m_option.h"
  36 #include "libvo/sub.h"
  37
  38 #include "libavformat/avformat.h"
  39 #include "libavformat/avio.h"
  40 #include "libavutil/avutil.h"
  41 #include "libavutil/avstring.h"
  42 #include "libavcodec/opt.h"
  43
  44 #include "mp_taglists.h"
  45
  46 #define INITIAL_PROBE_SIZE STREAM_BUFFER_SIZE
  47 #define SMALL_MAX_PROBE_SIZE (32 * 1024)
  48 #define PROBE_BUF_SIZE (2*1024*1024)
  49
  50 extern char *audio_lang;
  51 extern char *dvdsub_lang;
  52 extern int dvdsub_id;
  53 static unsigned int opt_probesize = 0;
  54 static unsigned int opt_analyzeduration = 0;
  55 static char *opt_format;
  56 static char *opt_cryptokey;
  57 static char *opt_avopt = NULL;
  58
  59 const m_option_t lavfdopts_conf[] = {
  60         {"probesize", &(opt_probesize), CONF_TYPE_INT, CONF_RANGE, 32, INT_MAX, NULL},
  61         {"format",    &(opt_format),    CONF_TYPE_STRING,       0,  0,       0, NULL},
  62         {"analyzeduration",    &(opt_analyzeduration),    CONF_TYPE_INT,       CONF_RANGE,  0,       INT_MAX, NULL},
  63         {"cryptokey", &(opt_cryptokey), CONF_TYPE_STRING,       0,  0,       0, NULL},
  64         {"o",                  &opt_avopt,                CONF_TYPE_STRING,    0,           0,             0, NULL},
  65         {NULL, NULL, 0, 0, 0, 0, NULL}
  66 };
  67
  68 #define BIO_BUFFER_SIZE 32768
  69
  70 typedef struct lavf_priv {
  71     AVInputFormat *avif;
  72     AVFormatContext *avfc;
  73     ByteIOContext *pb;
  74     uint8_t buffer[BIO_BUFFER_SIZE];
  75     int audio_streams;
  76     int video_streams;
  77     int sub_streams;
  78     int64_t last_pts;
  79     int astreams[MAX_A_STREAMS];
  80     int vstreams[MAX_V_STREAMS];
  81     int sstreams[MAX_S_STREAMS];
  82     int cur_program;
  83 }lavf_priv_t;
  84
  85 static int mp_read(void *opaque, uint8_t *buf, int size) {
  86     demuxer_t *demuxer = opaque;
  87     stream_t *stream = demuxer->stream;
  88     int ret;
  89
  90     if(stream_eof(stream)) //needed?
  91         return -1;
  92     ret=stream_read(stream, buf, size);
  93
  94     mp_msg(MSGT_HEADER,MSGL_DBG2,"%d=mp_read(%p, %p, %d), eof:%d\n", ret, stream, buf, size, stream->eof);
  95     return ret;
  96 }
  97
  98 static int64_t mp_seek(void *opaque, int64_t pos, int whence) {
  99     demuxer_t *demuxer = opaque;
 100     stream_t *stream = demuxer->stream;
 101     int64_t current_pos;
 102     mp_msg(MSGT_HEADER,MSGL_DBG2,"mp_seek(%p, %"PRId64", %d)\n", stream, pos, whence);
 103     if(whence == SEEK_CUR)
 104         pos +=stream_tell(stream);
 105     else if(whence == SEEK_END && stream->end_pos > 0)
 106         pos += stream->end_pos;
 107     else if(whence == SEEK_SET)
 108         pos += stream->start_pos;
 109     else if(whence == AVSEEK_SIZE && stream->end_pos > 0)
 110         return stream->end_pos - stream->start_pos;
 111     else
 112         return -1;
 113
 114     if(pos<0)
 115         return -1;
 116     if(pos<stream->end_pos && stream->eof)
 117         stream_reset(stream);
 118     current_pos = stream_tell(stream);
 119     if(stream_seek(stream, pos)==0) {
 120         stream_reset(stream);
 121         stream_seek(stream, current_pos);
 122         return -1;
 123     }
 124
 125     return pos - stream->start_pos;
 126 }
 127
 128 static int64_t mp_read_seek(void *opaque, int stream_idx, int64_t ts, int flags) {
 129     demuxer_t *demuxer = opaque;
 130     stream_t *stream = demuxer->stream;
 131     lavf_priv_t *priv = demuxer->priv;
 132     AVStream *st = priv->avfc->streams[stream_idx];
 133     int ret;
 134     double pts;
 135
 136     pts = (double)ts * st->time_base.num / st->time_base.den;
 137     ret = stream_control(stream, STREAM_CTRL_SEEK_TO_TIME, &pts);
 138     if (ret < 0)
 139         ret = AVERROR(ENOSYS);
 140     return ret;
 141 }
 142
 143 static void list_formats(void) {
 144     AVInputFormat *fmt;
 145     mp_msg(MSGT_DEMUX, MSGL_INFO, "Available lavf input formats:\n");
 146     for (fmt = first_iformat; fmt; fmt = fmt->next)
 147         mp_msg(MSGT_DEMUX, MSGL_INFO, "%15s : %s\n", fmt->name, fmt->long_name);
 148 }
 149
 150 static int lavf_check_file(demuxer_t *demuxer){
 151     AVProbeData avpd;
 152     lavf_priv_t *priv;
 153     int probe_data_size = 0;
 154     int read_size = INITIAL_PROBE_SIZE;
 155     int score;
 156
 157     if(!demuxer->priv)
 158         demuxer->priv=calloc(sizeof(lavf_priv_t),1);
 159     priv= demuxer->priv;
 160
 161     av_register_all();
 162
 163     if (opt_format) {
 164         if (strcmp(opt_format, "help") == 0) {
 165            list_formats();
 166            return 0;
 167         }
 168         priv->avif= av_find_input_format(opt_format);
 169         if (!priv->avif) {
 170             mp_msg(MSGT_DEMUX,MSGL_FATAL,"Unknown lavf format %s\n", opt_format);
 171             return 0;
 172         }
 173         mp_msg(MSGT_DEMUX,MSGL_INFO,"Forced lavf %s demuxer\n", priv->avif->long_name);
 174         return DEMUXER_TYPE_LAVF;
 175     }
 176
 177     avpd.buf = av_mallocz(FFMAX(BIO_BUFFER_SIZE, PROBE_BUF_SIZE) +
 178                           FF_INPUT_BUFFER_PADDING_SIZE);
 179     do {
 180         read_size = stream_read(demuxer->stream, avpd.buf + probe_data_size, read_size);
 181         if(read_size < 0) {
 182             av_free(avpd.buf);
 183             return 0;
 184         }
 185         probe_data_size += read_size;
 186         avpd.filename= demuxer->stream->url;
 187         if (!strncmp(avpd.filename, "ffmpeg://", 9))
 188             avpd.filename += 9;
 189         avpd.buf_size= probe_data_size;
 190
 191         score = 0;
 192         priv->avif= av_probe_input_format2(&avpd, probe_data_size > 0, &score);
 193         read_size = FFMIN(2*read_size, PROBE_BUF_SIZE - probe_data_size);
 194     } while ((demuxer->desc->type != DEMUXER_TYPE_LAVF_PREFERRED ||
 195               probe_data_size < SMALL_MAX_PROBE_SIZE) &&
 196              score <= AVPROBE_SCORE_MAX / 4 &&
 197              read_size > 0 && probe_data_size < PROBE_BUF_SIZE);
 198     av_free(avpd.buf);
 199
 200     if(!priv->avif){
 201         mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: no clue about this gibberish!\n");
 202         return 0;
 203     }else
 204         mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: %s\n", priv->avif->long_name);
 205
 206     return DEMUXER_TYPE_LAVF;
 207 }
 208
 209 static const char * const preferred_list[] = {
 210     "dxa",
 211     "flv",
 212     "gxf",
 213     "nut",
 214     "nuv",
 215     "matroska",
 216     "mov,mp4,m4a,3gp,3g2,mj2",
 217     "mpc",
 218     "mpc8",
 219     "mxf",
 220     "ogg",
 221     "swf",
 222     "vqf",
 223     "w64",
 224     "wv",
 225     NULL
 226 };
 227
 228 static int lavf_check_preferred_file(demuxer_t *demuxer){
 229     if (lavf_check_file(demuxer)) {
 230         const char * const *p = preferred_list;
 231         lavf_priv_t *priv = demuxer->priv;
 232         while (*p) {
 233             if (strcmp(*p, priv->avif->name) == 0)
 234                 return DEMUXER_TYPE_LAVF_PREFERRED;
 235             p++;
 236         }
 237     }
 238     return 0;
 239 }
 240
 241 static uint8_t char2int(char c) {
 242     if (c >= '0' && c <= '9') return c - '0';
 243     if (c >= 'a' && c <= 'f') return c - 'a' + 10;
 244     if (c >= 'A' && c <= 'F') return c - 'A' + 10;
 245     return 0;
 246 }
 247
 248 static void parse_cryptokey(AVFormatContext *avfc, const char *str) {
 249     int len = strlen(str) / 2;
 250     uint8_t *key = av_mallocz(len);
 251     int i;
 252     avfc->keylen = len;
 253     avfc->key = key;
 254     for (i = 0; i < len; i++, str += 2)
 255         *key++ = (char2int(str[0]) << 4) | char2int(str[1]);
 256 }
 257
 258 static void handle_stream(demuxer_t *demuxer, AVFormatContext *avfc, int i) {
 259     lavf_priv_t *priv= demuxer->priv;
 260     AVStream *st= avfc->streams[i];
 261     AVCodecContext *codec= st->codec;
 262     char *stream_type = NULL;
 263     int stream_id;
 264     AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL, 0);
 265     AVMetadataTag *title= av_metadata_get(st->metadata, "title",    NULL, 0);
 266     int g, override_tag = av_codec_get_tag(mp_codecid_override_taglists,
 267                                            codec->codec_id);
 268     // For some formats (like PCM) always trust CODEC_ID_* more than codec_tag
 269     if (override_tag)
 270         codec->codec_tag = override_tag;
 271
 272     switch(codec->codec_type){
 273         case CODEC_TYPE_AUDIO:{
 274             WAVEFORMATEX *wf;
 275             sh_audio_t* sh_audio;
 276             sh_audio = new_sh_audio_aid(demuxer, i, priv->audio_streams);
 277             if(!sh_audio)
 278                 break;
 279             stream_type = "audio";
 280             priv->astreams[priv->audio_streams] = i;
 281             wf= calloc(sizeof(WAVEFORMATEX) + codec->extradata_size, 1);
 282             // mp4a tag is used for all mp4 files no matter what they actually contain
 283             if(codec->codec_tag == MKTAG('m', 'p', '4', 'a'))
 284                 codec->codec_tag= 0;
 285             if(!codec->codec_tag)
 286                 codec->codec_tag= av_codec_get_tag(mp_wav_taglists, codec->codec_id);
 287             wf->wFormatTag= codec->codec_tag;
 288             wf->nChannels= codec->channels;
 289             wf->nSamplesPerSec= codec->sample_rate;
 290             wf->nAvgBytesPerSec= codec->bit_rate/8;
 291             wf->nBlockAlign= codec->block_align ? codec->block_align : 1;
 292             wf->wBitsPerSample= codec->bits_per_coded_sample;
 293             wf->cbSize= codec->extradata_size;
 294             if(codec->extradata_size)
 295                 memcpy(wf + 1, codec->extradata, codec->extradata_size);
 296             sh_audio->wf= wf;
 297             sh_audio->audio.dwSampleSize= codec->block_align;
 298             if(codec->frame_size && codec->sample_rate){
 299                 sh_audio->audio.dwScale=codec->frame_size;
 300                 sh_audio->audio.dwRate= codec->sample_rate;
 301             }else{
 302                 sh_audio->audio.dwScale= codec->block_align ? codec->block_align*8 : 8;
 303                 sh_audio->audio.dwRate = codec->bit_rate;
 304             }
 305             g= av_gcd(sh_audio->audio.dwScale, sh_audio->audio.dwRate);
 306             sh_audio->audio.dwScale /= g;
 307             sh_audio->audio.dwRate  /= g;
 308 //          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);
 309             sh_audio->ds= demuxer->audio;
 310             sh_audio->format= codec->codec_tag;
 311             sh_audio->channels= codec->channels;
 312             sh_audio->samplerate= codec->sample_rate;
 313             sh_audio->i_bps= codec->bit_rate/8;
 314             switch (codec->codec_id) {
 315                 case CODEC_ID_PCM_S8:
 316                 case CODEC_ID_PCM_U8:
 317                     sh_audio->samplesize = 1;
 318                     break;
 319                 case CODEC_ID_PCM_S16LE:
 320                 case CODEC_ID_PCM_S16BE:
 321                 case CODEC_ID_PCM_U16LE:
 322                 case CODEC_ID_PCM_U16BE:
 323                     sh_audio->samplesize = 2;
 324                     break;
 325                 case CODEC_ID_PCM_ALAW:
 326                     sh_audio->format = 0x6;
 327                     break;
 328                 case CODEC_ID_PCM_MULAW:
 329                     sh_audio->format = 0x7;
 330                     break;
 331             }
 332             if (title && title->value)
 333                 mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AID_%d_NAME=%s\n", priv->audio_streams, title->value);
 334             if (lang && lang->value) {
 335               sh_audio->lang = strdup(lang->value);
 336               mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AID_%d_LANG=%s\n", priv->audio_streams, sh_audio->lang);
 337             }
 338             if (st->disposition & AV_DISPOSITION_DEFAULT)
 339               sh_audio->default_track = 1;
 340             if(mp_msg_test(MSGT_HEADER,MSGL_V) ) print_wave_header(sh_audio->wf, MSGL_V);
 341             // select the first audio stream
 342             if (!demuxer->audio->sh) {
 343                 demuxer->audio->id = i;
 344                 demuxer->audio->sh= demuxer->a_streams[i];
 345             } else
 346                 st->discard= AVDISCARD_ALL;
 347             stream_id = priv->audio_streams++;
 348             break;
 349         }
 350         case CODEC_TYPE_VIDEO:{
 351             sh_video_t* sh_video;
 352             BITMAPINFOHEADER *bih;
 353             sh_video=new_sh_video_vid(demuxer, i, priv->video_streams);
 354             if(!sh_video) break;
 355             stream_type = "video";
 356             priv->vstreams[priv->video_streams] = i;
 357             bih=calloc(sizeof(BITMAPINFOHEADER) + codec->extradata_size,1);
 358
 359             if(codec->codec_id == CODEC_ID_RAWVIDEO) {
 360                 switch (codec->pix_fmt) {
 361                     case PIX_FMT_RGB24:
 362                         codec->codec_tag= MKTAG(24, 'B', 'G', 'R');
 363                 }
 364             }
 365             if(!codec->codec_tag)
 366                 codec->codec_tag= av_codec_get_tag(mp_bmp_taglists, codec->codec_id);
 367             bih->biSize= sizeof(BITMAPINFOHEADER) + codec->extradata_size;
 368             bih->biWidth= codec->width;
 369             bih->biHeight= codec->height;
 370             bih->biBitCount= codec->bits_per_coded_sample;
 371             bih->biSizeImage = bih->biWidth * bih->biHeight * bih->biBitCount/8;
 372             bih->biCompression= codec->codec_tag;
 373             sh_video->bih= bih;
 374             sh_video->disp_w= codec->width;
 375             sh_video->disp_h= codec->height;
 376             if (st->time_base.den) { /* if container has time_base, use that */
 377                 sh_video->video.dwRate= st->time_base.den;
 378                 sh_video->video.dwScale= st->time_base.num;
 379             } else {
 380                 sh_video->video.dwRate= codec->time_base.den;
 381                 sh_video->video.dwScale= codec->time_base.num;
 382             }
 383             sh_video->fps=av_q2d(st->r_frame_rate);
 384             sh_video->frametime=1/av_q2d(st->r_frame_rate);
 385             sh_video->format=bih->biCompression;
 386             if(st->sample_aspect_ratio.num)
 387                 sh_video->aspect = codec->width  * st->sample_aspect_ratio.num
 388                          / (float)(codec->height * st->sample_aspect_ratio.den);
 389             else
 390                 sh_video->aspect=codec->width  * codec->sample_aspect_ratio.num
 391                        / (float)(codec->height * codec->sample_aspect_ratio.den);
 392             sh_video->i_bps=codec->bit_rate/8;
 393             if (title && title->value)
 394                 mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VID_%d_NAME=%s\n", priv->video_streams, title->value);
 395             mp_msg(MSGT_DEMUX,MSGL_DBG2,"aspect= %d*%d/(%d*%d)\n",
 396                 codec->width, codec->sample_aspect_ratio.num,
 397                 codec->height, codec->sample_aspect_ratio.den);
 398
 399             sh_video->ds= demuxer->video;
 400             if(codec->extradata_size)
 401                 memcpy(sh_video->bih + 1, codec->extradata, codec->extradata_size);
 402             if( mp_msg_test(MSGT_HEADER,MSGL_V) ) print_video_header(sh_video->bih, MSGL_V);
 403             /*
 404                 short biPlanes;
 405                 int  biXPelsPerMeter;
 406                 int  biYPelsPerMeter;
 407                 int biClrUsed;
 408                 int biClrImportant;
 409             */
 410             if(demuxer->video->id != i && demuxer->video->id != -1)
 411                 st->discard= AVDISCARD_ALL;
 412             else{
 413                 demuxer->video->id = i;
 414                 demuxer->video->sh= demuxer->v_streams[i];
 415             }
 416             stream_id = priv->video_streams++;
 417             break;
 418         }
 419         case CODEC_TYPE_SUBTITLE:{
 420             sh_sub_t* sh_sub;
 421             char type;
 422             /* only support text subtitles for now */
 423             if(codec->codec_id == CODEC_ID_TEXT)
 424                 type = 't';
 425             else if(codec->codec_id == CODEC_ID_MOV_TEXT)
 426                 type = 'm';
 427             else if(codec->codec_id == CODEC_ID_SSA)
 428                 type = 'a';
 429             else if(codec->codec_id == CODEC_ID_DVD_SUBTITLE)
 430                 type = 'v';
 431             else if(codec->codec_id == CODEC_ID_DVB_TELETEXT)
 432                 type = 'd';
 433             else
 434                 break;
 435             sh_sub = new_sh_sub_sid(demuxer, i, priv->sub_streams);
 436             if(!sh_sub) break;
 437             stream_type = "subtitle";
 438             priv->sstreams[priv->sub_streams] = i;
 439             sh_sub->type = type;
 440             if (codec->extradata_size) {
 441                 sh_sub->extradata = malloc(codec->extradata_size);
 442                 memcpy(sh_sub->extradata, codec->extradata, codec->extradata_size);
 443                 sh_sub->extradata_len = codec->extradata_size;
 444             }
 445             if (title && title->value)
 446                 mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SID_%d_NAME=%s\n", priv->sub_streams, title->value);
 447             if (lang && lang->value) {
 448               sh_sub->lang = strdup(lang->value);
 449               mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SID_%d_LANG=%s\n", priv->sub_streams, sh_sub->lang);
 450             }
 451             if (st->disposition & AV_DISPOSITION_DEFAULT)
 452               sh_sub->default_track = 1;
 453             stream_id = priv->sub_streams++;
 454             break;
 455         }
 456         case CODEC_TYPE_ATTACHMENT:{
 457             if (st->codec->codec_id == CODEC_ID_TTF)
 458                 demuxer_add_attachment(demuxer, st->filename,
 459                                        "application/x-truetype-font",
 460                                        codec->extradata, codec->extradata_size);
 461             break;
 462         }
 463         default:
 464             st->discard= AVDISCARD_ALL;
 465     }
 466     if (stream_type) {
 467         AVCodec *avc = avcodec_find_decoder(codec->codec_id);
 468         mp_msg(MSGT_DEMUX, MSGL_INFO, "[lavf] stream %d: %s (%s), -%cid %d", i, stream_type, avc ? avc->name : "unknown", *stream_type, stream_id);
 469         if (lang && lang->value && *stream_type != 'v')
 470             mp_msg(MSGT_DEMUX, MSGL_INFO, ", -%clang %s", *stream_type, lang->value);
 471         if (title && title->value)
 472             mp_msg(MSGT_DEMUX, MSGL_INFO, ", %s", title->value);
 473         mp_msg(MSGT_DEMUX, MSGL_INFO, "\n");
 474     }
 475 }
 476
 477 static demuxer_t* demux_open_lavf(demuxer_t *demuxer){
 478     AVFormatContext *avfc;
 479     AVFormatParameters ap;
 480     const AVOption *opt;
 481     AVMetadataTag *t = NULL;
 482     lavf_priv_t *priv= demuxer->priv;
 483     int i;
 484     char mp_filename[256]="mp:";
 485
 486     memset(&ap, 0, sizeof(AVFormatParameters));
 487
 488     stream_seek(demuxer->stream, 0);
 489
 490     avfc = avformat_alloc_context();
 491
 492     if (opt_cryptokey)
 493         parse_cryptokey(avfc, opt_cryptokey);
 494     if (user_correct_pts != 0)
 495         avfc->flags |= AVFMT_FLAG_GENPTS;
 496     if (index_mode == 0)
 497         avfc->flags |= AVFMT_FLAG_IGNIDX;
 498
 499     ap.prealloced_context = 1;
 500     if(opt_probesize) {
 501         opt = av_set_int(avfc, "probesize", opt_probesize);
 502         if(!opt) mp_msg(MSGT_HEADER,MSGL_ERR, "demux_lavf, couldn't set option probesize to %u\n", opt_probesize);
 503     }
 504     if(opt_analyzeduration) {
 505         opt = av_set_int(avfc, "analyzeduration", opt_analyzeduration * AV_TIME_BASE);
 506         if(!opt) mp_msg(MSGT_HEADER,MSGL_ERR, "demux_lavf, couldn't set option analyzeduration to %u\n", opt_analyzeduration);
 507     }
 508
 509     if(opt_avopt){
 510         if(parse_avopts(avfc, opt_avopt) < 0){
 511             mp_msg(MSGT_HEADER,MSGL_ERR, "Your options /%s/ look like gibberish to me pal\n", opt_avopt);
 512             return NULL;
 513         }
 514     }
 515
 516     if(demuxer->stream->url) {
 517         if (!strncmp(demuxer->stream->url, "ffmpeg://rtsp:", 14))
 518             av_strlcpy(mp_filename, demuxer->stream->url + 9, sizeof(mp_filename));
 519         else
 520             av_strlcat(mp_filename, demuxer->stream->url, sizeof(mp_filename));
 521     } else
 522         av_strlcat(mp_filename, "foobar.dummy", sizeof(mp_filename));
 523
 524     priv->pb = av_alloc_put_byte(priv->buffer, BIO_BUFFER_SIZE, 0,
 525                                  demuxer, mp_read, NULL, mp_seek);
 526     priv->pb->read_seek = mp_read_seek;
 527     priv->pb->is_streamed = !demuxer->stream->end_pos || (demuxer->stream->flags & MP_STREAM_SEEK) != MP_STREAM_SEEK;
 528
 529     if(av_open_input_stream(&avfc, priv->pb, mp_filename, priv->avif, &ap)<0){
 530         mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_open_input_stream() failed\n");
 531         return NULL;
 532     }
 533
 534     priv->avfc= avfc;
 535
 536     if(av_find_stream_info(avfc) < 0){
 537         mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_find_stream_info() failed\n");
 538         return NULL;
 539     }
 540
 541     /* Add metadata. */
 542     av_metadata_conv(avfc, NULL, avfc->iformat->metadata_conv);
 543     while((t = av_metadata_get(avfc->metadata, "", t, AV_METADATA_IGNORE_SUFFIX)))
 544         demux_info_add(demuxer, t->key, t->value);
 545
 546     for(i=0; i < avfc->nb_chapters; i++) {
 547         AVChapter *c = avfc->chapters[i];
 548         uint64_t start = av_rescale_q(c->start, c->time_base, (AVRational){1,1000});
 549         uint64_t end   = av_rescale_q(c->end, c->time_base, (AVRational){1,1000});
 550         t = av_metadata_get(c->metadata, "title", NULL, 0);
 551         demuxer_add_chapter(demuxer, t ? t->value : NULL, start, end);
 552     }
 553
 554     for(i=0; i<avfc->nb_streams; i++)
 555         handle_stream(demuxer, avfc, i);
 556     if(avfc->nb_programs) {
 557         int p;
 558         for (p = 0; p < avfc->nb_programs; p++) {
 559             AVProgram *program = avfc->programs[p];
 560             t = av_metadata_get(program->metadata, "title", NULL, 0);
 561             mp_msg(MSGT_HEADER,MSGL_INFO,"LAVF: Program %d %s\n", program->id, t ? t->value : "");
 562         }
 563     }
 564
 565     mp_msg(MSGT_HEADER,MSGL_V,"LAVF: %d audio and %d video streams found\n",priv->audio_streams,priv->video_streams);
 566     mp_msg(MSGT_HEADER,MSGL_V,"LAVF: build %d\n", LIBAVFORMAT_BUILD);
 567     if(!priv->audio_streams) demuxer->audio->id=-2;  // nosound
 568 //    else if(best_audio > 0 && demuxer->audio->id == -1) demuxer->audio->id=best_audio;
 569     if(!priv->video_streams){
 570         if(!priv->audio_streams){
 571             mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF: no audio or video headers found - broken file?\n");
 572             return NULL;
 573         }
 574         demuxer->video->id=-2; // audio-only
 575     } //else if (best_video > 0 && demuxer->video->id == -1) demuxer->video->id = best_video;
 576
 577     return demuxer;
 578 }
 579
 580 static int demux_lavf_fill_buffer(demuxer_t *demux, demux_stream_t *dsds){
 581     lavf_priv_t *priv= demux->priv;
 582     AVPacket pkt;
 583     demux_packet_t *dp;
 584     demux_stream_t *ds;
 585     int id;
 586     mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_lavf_fill_buffer()\n");
 587
 588     demux->filepos=stream_tell(demux->stream);
 589
 590     if(av_read_frame(priv->avfc, &pkt) < 0)
 591         return 0;
 592
 593     id= pkt.stream_index;
 594
 595     if(id==demux->audio->id){
 596         // audio
 597         ds=demux->audio;
 598         if(!ds->sh){
 599             ds->sh=demux->a_streams[id];
 600             mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF audio ID = %d\n",ds->id);
 601         }
 602     } else if(id==demux->video->id){
 603         // video
 604         ds=demux->video;
 605         if(!ds->sh){
 606             ds->sh=demux->v_streams[id];
 607             mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF video ID = %d\n",ds->id);
 608         }
 609     } else if(id==demux->sub->id){
 610         // subtitle
 611         ds=demux->sub;
 612         sub_utf8=1;
 613     } else {
 614         av_free_packet(&pkt);
 615         return 1;
 616     }
 617
 618     if(0/*pkt.destruct == av_destruct_packet*/){
 619         //ok kids, dont try this at home :)
 620         dp=malloc(sizeof(demux_packet_t));
 621         dp->len=pkt.size;
 622         dp->next=NULL;
 623         dp->refcount=1;
 624         dp->master=NULL;
 625         dp->buffer=pkt.data;
 626         pkt.destruct= NULL;
 627     }else{
 628         dp=new_demux_packet(pkt.size);
 629         memcpy(dp->buffer, pkt.data, pkt.size);
 630         av_free_packet(&pkt);
 631     }
 632
 633     if(pkt.pts != AV_NOPTS_VALUE){
 634         dp->pts=pkt.pts * av_q2d(priv->avfc->streams[id]->time_base);
 635         priv->last_pts= dp->pts * AV_TIME_BASE;
 636         if(pkt.convergence_duration)
 637             dp->endpts = dp->pts + pkt.convergence_duration * av_q2d(priv->avfc->streams[id]->time_base);
 638     }
 639     dp->pos=demux->filepos;
 640     dp->flags= !!(pkt.flags&PKT_FLAG_KEY);
 641     // append packet to DS stream:
 642     ds_add_packet(ds,dp);
 643     return 1;
 644 }
 645
 646 static void demux_seek_lavf(demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags){
 647     lavf_priv_t *priv = demuxer->priv;
 648     int avsflags = 0;
 649     mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_seek_lavf(%p, %f, %f, %d)\n", demuxer, rel_seek_secs, audio_delay, flags);
 650
 651     if (flags & SEEK_ABSOLUTE) {
 652       priv->last_pts = priv->avfc->start_time;
 653     } else {
 654       if (rel_seek_secs < 0) avsflags = AVSEEK_FLAG_BACKWARD;
 655     }
 656     if (flags & SEEK_FACTOR) {
 657       if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 658         return;
 659       priv->last_pts += rel_seek_secs * priv->avfc->duration;
 660     } else {
 661       priv->last_pts += rel_seek_secs * AV_TIME_BASE;
 662     }
 663     if (av_seek_frame(priv->avfc, -1, priv->last_pts, avsflags) < 0) {
 664         avsflags ^= AVSEEK_FLAG_BACKWARD;
 665         av_seek_frame(priv->avfc, -1, priv->last_pts, avsflags);
 666     }
 667 }
 668
 669 static int demux_lavf_control(demuxer_t *demuxer, int cmd, void *arg)
 670 {
 671     lavf_priv_t *priv = demuxer->priv;
 672
 673     switch (cmd) {
 674         case DEMUXER_CTRL_CORRECT_PTS:
 675             return DEMUXER_CTRL_OK;
 676         case DEMUXER_CTRL_GET_TIME_LENGTH:
 677             if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 678                 return DEMUXER_CTRL_DONTKNOW;
 679
 680             *((double *)arg) = (double)priv->avfc->duration / AV_TIME_BASE;
 681             return DEMUXER_CTRL_OK;
 682
 683         case DEMUXER_CTRL_GET_PERCENT_POS:
 684             if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 685                 return DEMUXER_CTRL_DONTKNOW;
 686
 687             *((int *)arg) = (int)((priv->last_pts - priv->avfc->start_time)*100 / priv->avfc->duration);
 688             return DEMUXER_CTRL_OK;
 689         case DEMUXER_CTRL_SWITCH_AUDIO:
 690         case DEMUXER_CTRL_SWITCH_VIDEO:
 691         {
 692             int id = *((int*)arg);
 693             int newid = -2;
 694             int i, curridx = -1;
 695             int nstreams, *pstreams;
 696             demux_stream_t *ds;
 697
 698             if(cmd == DEMUXER_CTRL_SWITCH_VIDEO)
 699             {
 700                 ds = demuxer->video;
 701                 nstreams = priv->video_streams;
 702                 pstreams = priv->vstreams;
 703             }
 704             else
 705             {
 706                 ds = demuxer->audio;
 707                 nstreams = priv->audio_streams;
 708                 pstreams = priv->astreams;
 709             }
 710             for(i = 0; i < nstreams; i++)
 711             {
 712                 if(pstreams[i] == ds->id) //current stream id
 713                 {
 714                     curridx = i;
 715                     break;
 716                 }
 717             }
 718
 719             if(id == -2) { // no sound
 720                 i = -1;
 721             } else if(id == -1) { // next track
 722                 i = (curridx + 2) % (nstreams + 1) - 1;
 723                 if (i >= 0)
 724                     newid = pstreams[i];
 725             }
 726             else // select track by id
 727             {
 728                 if (id >= 0 && id < nstreams) {
 729                     i = id;
 730                     newid = pstreams[i];
 731                 }
 732             }
 733             if(i == curridx)
 734                 return DEMUXER_CTRL_NOTIMPL;
 735             else
 736             {
 737                 ds_free_packs(ds);
 738                 if(ds->id >= 0)
 739                     priv->avfc->streams[ds->id]->discard = AVDISCARD_ALL;
 740                 *((int*)arg) = ds->id = newid;
 741                 if(newid >= 0)
 742                     priv->avfc->streams[newid]->discard = AVDISCARD_NONE;
 743                 return DEMUXER_CTRL_OK;
 744             }
 745         }
 746         case DEMUXER_CTRL_IDENTIFY_PROGRAM:
 747         {
 748             demux_program_t *prog = arg;
 749             AVProgram *program;
 750             int p, i;
 751             int start;
 752
 753             prog->vid = prog->aid = prog->sid = -2;     //no audio and no video by default
 754             if(priv->avfc->nb_programs < 1)
 755                 return DEMUXER_CTRL_DONTKNOW;
 756
 757             if(prog->progid == -1)
 758             {
 759                 p = 0;
 760                 while(p<priv->avfc->nb_programs && priv->avfc->programs[p]->id != priv->cur_program)
 761                     p++;
 762                 p = (p + 1) % priv->avfc->nb_programs;
 763             }
 764             else
 765             {
 766                 for(i=0; i<priv->avfc->nb_programs; i++)
 767                     if(priv->avfc->programs[i]->id == prog->progid)
 768                         break;
 769                 if(i==priv->avfc->nb_programs)
 770                     return DEMUXER_CTRL_DONTKNOW;
 771                 p = i;
 772             }
 773             start = p;
 774 redo:
 775             program = priv->avfc->programs[p];
 776             for(i=0; i<program->nb_stream_indexes; i++)
 777             {
 778                 switch(priv->avfc->streams[program->stream_index[i]]->codec->codec_type)
 779                 {
 780                     case CODEC_TYPE_VIDEO:
 781                         if(prog->vid == -2)
 782                             prog->vid = program->stream_index[i];
 783                         break;
 784                     case CODEC_TYPE_AUDIO:
 785                         if(prog->aid == -2)
 786                             prog->aid = program->stream_index[i];
 787                         break;
 788                     case CODEC_TYPE_SUBTITLE:
 789                         if(prog->sid == -2 && priv->avfc->streams[program->stream_index[i]]->codec->codec_id == CODEC_ID_TEXT)
 790                             prog->sid = program->stream_index[i];
 791                         break;
 792                 }
 793             }
 794             if(prog->progid == -1 && prog->vid == -2 && prog->aid == -2)
 795             {
 796                 p = (p + 1) % priv->avfc->nb_programs;
 797                 if (p == start)
 798                     return DEMUXER_CTRL_DONTKNOW;
 799                 goto redo;
 800             }
 801             priv->cur_program = prog->progid = program->id;
 802             return DEMUXER_CTRL_OK;
 803         }
 804         default:
 805             return DEMUXER_CTRL_NOTIMPL;
 806     }
 807 }
 808
 809 static void demux_close_lavf(demuxer_t *demuxer)
 810 {
 811     lavf_priv_t* priv = demuxer->priv;
 812     if (priv){
 813         if(priv->avfc)
 814        {
 815          av_freep(&priv->avfc->key);
 816          av_close_input_stream(priv->avfc);
 817         }
 818         av_freep(&priv->pb);
 819         free(priv); demuxer->priv= NULL;
 820     }
 821 }
 822
 823
 824 const demuxer_desc_t demuxer_desc_lavf = {
 825   "libavformat demuxer",
 826   "lavf",
 827   "libavformat",
 828   "Michael Niedermayer",
 829   "supports many formats, requires libavformat",
 830   DEMUXER_TYPE_LAVF,
 831   0, // Check after other demuxer
 832   lavf_check_file,
 833   demux_lavf_fill_buffer,
 834   demux_open_lavf,
 835   demux_close_lavf,
 836   demux_seek_lavf,
 837   demux_lavf_control
 838 };
 839
 840 const demuxer_desc_t demuxer_desc_lavf_preferred = {
 841   "libavformat preferred demuxer",
 842   "lavfpref",
 843   "libavformat",
 844   "Michael Niedermayer",
 845   "supports many formats, requires libavformat",
 846   DEMUXER_TYPE_LAVF_PREFERRED,
 847   1,
 848   lavf_check_preferred_file,
 849   demux_lavf_fill_buffer,
 850   demux_open_lavf,
 851   demux_close_lavf,
 852   demux_seek_lavf,
 853   demux_lavf_control
 854 };