libmpdemux/demux_lavf.c

   1 /*
   2  * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 // #include <stdio.h>
  22 #include <stdlib.h>
  23 // #include <unistd.h>
  24 #include <limits.h>
  25 #include <stdbool.h>
  26 #include <string.h>
  27
  28 #include "config.h"
  29 #include "options.h"
  30 #include "mp_msg.h"
  31 #include "av_opts.h"
  32 #include "bstr.h"
  33
  34 #include "stream/stream.h"
  35 #include "aviprint.h"
  36 #include "demuxer.h"
  37 #include "stheader.h"
  38 #include "m_option.h"
  39 #include "libvo/sub.h"
  40
  41 #include "libavformat/avformat.h"
  42 #include "libavformat/avio.h"
  43 #include "libavutil/avutil.h"
  44 #include "libavutil/avstring.h"
  45 #include "libavcodec/opt.h"
  46
  47 #include "mp_taglists.h"
  48
  49 #define INITIAL_PROBE_SIZE STREAM_BUFFER_SIZE
  50 #define SMALL_MAX_PROBE_SIZE (32 * 1024)
  51 #define PROBE_BUF_SIZE (2*1024*1024)
  52
  53 const m_option_t lavfdopts_conf[] = {
  54     OPT_INTRANGE("probesize", lavfdopts.probesize, 0, 32, INT_MAX),
  55     OPT_STRING("format", lavfdopts.format, 0),
  56     OPT_INTRANGE("analyzeduration", lavfdopts.analyzeduration, 0, 0, INT_MAX),
  57     OPT_STRING("cryptokey", lavfdopts.cryptokey, 0),
  58     OPT_STRING("o", lavfdopts.avopt, 0),
  59     {NULL, NULL, 0, 0, 0, 0, NULL}
  60 };
  61
  62 #define BIO_BUFFER_SIZE 32768
  63
  64 typedef struct lavf_priv {
  65     AVInputFormat *avif;
  66     AVFormatContext *avfc;
  67     ByteIOContext *pb;
  68     uint8_t buffer[BIO_BUFFER_SIZE];
  69     int audio_streams;
  70     int video_streams;
  71     int sub_streams;
  72     int64_t last_pts;
  73     int astreams[MAX_A_STREAMS];
  74     int vstreams[MAX_V_STREAMS];
  75     int sstreams[MAX_S_STREAMS];
  76     int cur_program;
  77     int nb_streams_last;
  78     bool internet_radio_hack;
  79     bool use_dts;
  80 }lavf_priv_t;
  81
  82 static int mp_read(void *opaque, uint8_t *buf, int size) {
  83     struct demuxer *demuxer = opaque;
  84     struct stream *stream = demuxer->stream;
  85     int ret;
  86
  87     ret=stream_read(stream, buf, size);
  88
  89     mp_msg(MSGT_HEADER,MSGL_DBG2,"%d=mp_read(%p, %p, %d), pos: %"PRId64", eof:%d\n",
  90            ret, stream, buf, size, stream_tell(stream), stream->eof);
  91     return ret;
  92 }
  93
  94 static int64_t mp_seek(void *opaque, int64_t pos, int whence) {
  95     struct demuxer *demuxer = opaque;
  96     struct stream *stream = demuxer->stream;
  97     int64_t current_pos;
  98     mp_msg(MSGT_HEADER,MSGL_DBG2,"mp_seek(%p, %"PRId64", %d)\n", stream, pos, whence);
  99     if(whence == SEEK_CUR)
 100         pos +=stream_tell(stream);
 101     else if(whence == SEEK_END && stream->end_pos > 0)
 102         pos += stream->end_pos;
 103     else if(whence == SEEK_SET)
 104         pos += stream->start_pos;
 105     else if(whence == AVSEEK_SIZE && stream->end_pos > 0)
 106         return stream->end_pos - stream->start_pos;
 107     else
 108         return -1;
 109
 110     if(pos<0)
 111         return -1;
 112     current_pos = stream_tell(stream);
 113     if(stream_seek(stream, pos)==0) {
 114         stream_reset(stream);
 115         stream_seek(stream, current_pos);
 116         return -1;
 117     }
 118
 119     return pos - stream->start_pos;
 120 }
 121
 122 static int64_t mp_read_seek(void *opaque, int stream_idx, int64_t ts, int flags)
 123 {
 124     struct demuxer *demuxer = opaque;
 125     struct stream *stream = demuxer->stream;
 126     struct lavf_priv *priv = demuxer->priv;
 127
 128     AVStream *st = priv->avfc->streams[stream_idx];
 129     double pts = (double)ts * st->time_base.num / st->time_base.den;
 130     int ret = stream_control(stream, STREAM_CTRL_SEEK_TO_TIME, &pts);
 131     if (ret < 0)
 132         ret = AVERROR(ENOSYS);
 133     return ret;
 134 }
 135
 136 static void list_formats(void) {
 137     mp_msg(MSGT_DEMUX, MSGL_INFO, "Available lavf input formats:\n");
 138     AVInputFormat *fmt = NULL;
 139     while (fmt = av_iformat_next(fmt))
 140         mp_msg(MSGT_DEMUX, MSGL_INFO, "%15s : %s\n", fmt->name, fmt->long_name);
 141 }
 142
 143 static int lavf_check_file(demuxer_t *demuxer){
 144     struct MPOpts *opts = demuxer->opts;
 145     struct lavfdopts *lavfdopts = &opts->lavfdopts;
 146     AVProbeData avpd;
 147     lavf_priv_t *priv;
 148     int probe_data_size = 0;
 149     int read_size = INITIAL_PROBE_SIZE;
 150     int score;
 151
 152     if(!demuxer->priv)
 153         demuxer->priv=calloc(sizeof(lavf_priv_t),1);
 154     priv= demuxer->priv;
 155
 156     av_register_all();
 157
 158     char *format = lavfdopts->format;
 159     if (!format)
 160         format = demuxer->stream->lavf_type;
 161     if (format) {
 162         if (strcmp(format, "help") == 0) {
 163            list_formats();
 164            return 0;
 165         }
 166         priv->avif = av_find_input_format(format);
 167         if (!priv->avif) {
 168             mp_msg(MSGT_DEMUX, MSGL_FATAL, "Unknown lavf format %s\n", format);
 169             return 0;
 170         }
 171         mp_msg(MSGT_DEMUX,MSGL_INFO,"Forced lavf %s demuxer\n", priv->avif->long_name);
 172         return DEMUXER_TYPE_LAVF;
 173     }
 174
 175     avpd.buf = av_mallocz(FFMAX(BIO_BUFFER_SIZE, PROBE_BUF_SIZE) +
 176                           FF_INPUT_BUFFER_PADDING_SIZE);
 177     do {
 178         read_size = stream_read(demuxer->stream, avpd.buf + probe_data_size, read_size);
 179         if(read_size < 0) {
 180             av_free(avpd.buf);
 181             return 0;
 182         }
 183         probe_data_size += read_size;
 184         avpd.filename= demuxer->stream->url;
 185         if (!avpd.filename) {
 186             mp_msg(MSGT_DEMUX, MSGL_WARN, "Stream url is not set!\n");
 187             avpd.filename = "";
 188         }
 189         if (!strncmp(avpd.filename, "ffmpeg://", 9))
 190             avpd.filename += 9;
 191         avpd.buf_size= probe_data_size;
 192
 193         score = 0;
 194         priv->avif= av_probe_input_format2(&avpd, probe_data_size > 0, &score);
 195         read_size = FFMIN(2*read_size, PROBE_BUF_SIZE - probe_data_size);
 196     } while ((demuxer->desc->type != DEMUXER_TYPE_LAVF_PREFERRED ||
 197               probe_data_size < SMALL_MAX_PROBE_SIZE) &&
 198              score <= AVPROBE_SCORE_MAX / 4 &&
 199              read_size > 0 && probe_data_size < PROBE_BUF_SIZE);
 200     av_free(avpd.buf);
 201
 202     if(!priv->avif){
 203         mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: no clue about this gibberish!\n");
 204         return 0;
 205     }else
 206         mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: %s\n", priv->avif->long_name);
 207
 208     return DEMUXER_TYPE_LAVF;
 209 }
 210
 211 static bool matches_avinputformat_name(struct lavf_priv *priv,
 212                                        const char *name)
 213 {
 214     const char *avifname = priv->avif->name;
 215     while (1) {
 216         const char *next = strchr(avifname, ',');
 217         if (!next)
 218             return !strcmp(avifname, name);
 219         int len = next - avifname;
 220         if (len == strlen(name) && !memcmp(avifname, name, len))
 221             return true;
 222         avifname = next + 1;
 223     }
 224 }
 225
 226 static const char * const preferred_list[] = {
 227     "dxa",
 228     "flv",
 229     "gxf",
 230     "nut",
 231     "nuv",
 232     "mov", "mp4",   // "mov,mp4,m4a,3gp,3g2,mj2" is one AVInputFormat
 233     "mpc",
 234     "mpc8",
 235     "mxf",
 236     "ogg",
 237     "swf",
 238     "vqf",
 239     "w64",
 240     "wv",
 241     NULL
 242 };
 243
 244 static int lavf_check_preferred_file(demuxer_t *demuxer){
 245     if (lavf_check_file(demuxer)) {
 246         const char * const *p;
 247         lavf_priv_t *priv = demuxer->priv;
 248         for (p = preferred_list; *p; p++)
 249             if (matches_avinputformat_name(priv, *p))
 250                 return DEMUXER_TYPE_LAVF_PREFERRED;
 251     }
 252     return 0;
 253 }
 254
 255 static uint8_t char2int(char c) {
 256     if (c >= '0' && c <= '9') return c - '0';
 257     if (c >= 'a' && c <= 'f') return c - 'a' + 10;
 258     if (c >= 'A' && c <= 'F') return c - 'A' + 10;
 259     return 0;
 260 }
 261
 262 static void parse_cryptokey(AVFormatContext *avfc, const char *str) {
 263     int len = strlen(str) / 2;
 264     uint8_t *key = av_mallocz(len);
 265     int i;
 266     avfc->keylen = len;
 267     avfc->key = key;
 268     for (i = 0; i < len; i++, str += 2)
 269         *key++ = (char2int(str[0]) << 4) | char2int(str[1]);
 270 }
 271
 272 static void handle_stream(demuxer_t *demuxer, AVFormatContext *avfc, int i) {
 273     lavf_priv_t *priv= demuxer->priv;
 274     AVStream *st= avfc->streams[i];
 275     AVCodecContext *codec= st->codec;
 276     char *stream_type = NULL;
 277     int stream_id;
 278     AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL, 0);
 279     AVMetadataTag *title= av_metadata_get(st->metadata, "title",    NULL, 0);
 280     int g, override_tag = mp_av_codec_get_tag(mp_codecid_override_taglists,
 281                                               codec->codec_id);
 282     // For some formats (like PCM) always trust CODEC_ID_* more than codec_tag
 283     if (override_tag)
 284         codec->codec_tag = override_tag;
 285
 286     switch(codec->codec_type){
 287         case CODEC_TYPE_AUDIO:{
 288             WAVEFORMATEX *wf;
 289             sh_audio_t* sh_audio;
 290             sh_audio = new_sh_audio_aid(demuxer, i, priv->audio_streams);
 291             if(!sh_audio)
 292                 break;
 293             stream_type = "audio";
 294             priv->astreams[priv->audio_streams] = i;
 295             wf= calloc(sizeof(*wf) + codec->extradata_size, 1);
 296             // mp4a tag is used for all mp4 files no matter what they actually contain
 297             if(codec->codec_tag == MKTAG('m', 'p', '4', 'a'))
 298                 codec->codec_tag= 0;
 299             if(!codec->codec_tag)
 300                 codec->codec_tag= mp_av_codec_get_tag(mp_wav_taglists, codec->codec_id);
 301             wf->wFormatTag= codec->codec_tag;
 302             wf->nChannels= codec->channels;
 303             wf->nSamplesPerSec= codec->sample_rate;
 304             wf->nAvgBytesPerSec= codec->bit_rate/8;
 305             wf->nBlockAlign= codec->block_align ? codec->block_align : 1;
 306             wf->wBitsPerSample= codec->bits_per_coded_sample;
 307             wf->cbSize= codec->extradata_size;
 308             if(codec->extradata_size)
 309                 memcpy(wf + 1, codec->extradata, codec->extradata_size);
 310             sh_audio->wf= wf;
 311             sh_audio->audio.dwSampleSize= codec->block_align;
 312             if(codec->frame_size && codec->sample_rate){
 313                 sh_audio->audio.dwScale=codec->frame_size;
 314                 sh_audio->audio.dwRate= codec->sample_rate;
 315             }else{
 316                 sh_audio->audio.dwScale= codec->block_align ? codec->block_align*8 : 8;
 317                 sh_audio->audio.dwRate = codec->bit_rate;
 318             }
 319             g= av_gcd(sh_audio->audio.dwScale, sh_audio->audio.dwRate);
 320             sh_audio->audio.dwScale /= g;
 321             sh_audio->audio.dwRate  /= g;
 322 //          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);
 323             sh_audio->ds= demuxer->audio;
 324             sh_audio->format= codec->codec_tag;
 325             sh_audio->channels= codec->channels;
 326             sh_audio->samplerate= codec->sample_rate;
 327             sh_audio->i_bps= codec->bit_rate/8;
 328             switch (codec->codec_id) {
 329                 case CODEC_ID_PCM_S8:
 330                 case CODEC_ID_PCM_U8:
 331                     sh_audio->samplesize = 1;
 332                     break;
 333                 case CODEC_ID_PCM_S16LE:
 334                 case CODEC_ID_PCM_S16BE:
 335                 case CODEC_ID_PCM_U16LE:
 336                 case CODEC_ID_PCM_U16BE:
 337                     sh_audio->samplesize = 2;
 338                     break;
 339                 case CODEC_ID_PCM_ALAW:
 340                     sh_audio->format = 0x6;
 341                     break;
 342                 case CODEC_ID_PCM_MULAW:
 343                     sh_audio->format = 0x7;
 344                     break;
 345             }
 346             if (title && title->value)
 347                 mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AID_%d_NAME=%s\n", priv->audio_streams, title->value);
 348             if (lang && lang->value) {
 349               sh_audio->lang = strdup(lang->value);
 350               mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AID_%d_LANG=%s\n", priv->audio_streams, sh_audio->lang);
 351             }
 352             if (st->disposition & AV_DISPOSITION_DEFAULT)
 353               sh_audio->default_track = 1;
 354             if(mp_msg_test(MSGT_HEADER,MSGL_V) ) print_wave_header(sh_audio->wf, MSGL_V);
 355             // select the first audio stream
 356             if (!demuxer->audio->sh) {
 357                 demuxer->audio->id = i;
 358                 demuxer->audio->sh= demuxer->a_streams[i];
 359             } else
 360                 st->discard= AVDISCARD_ALL;
 361             stream_id = priv->audio_streams++;
 362             break;
 363         }
 364         case CODEC_TYPE_VIDEO:{
 365             sh_video_t* sh_video;
 366             BITMAPINFOHEADER *bih;
 367             sh_video=new_sh_video_vid(demuxer, i, priv->video_streams);
 368             if(!sh_video) break;
 369             stream_type = "video";
 370             priv->vstreams[priv->video_streams] = i;
 371             bih=calloc(sizeof(*bih) + codec->extradata_size,1);
 372
 373             if(codec->codec_id == CODEC_ID_RAWVIDEO) {
 374                 switch (codec->pix_fmt) {
 375                     case PIX_FMT_RGB24:
 376                         codec->codec_tag= MKTAG(24, 'B', 'G', 'R');
 377                 }
 378             }
 379             if(!codec->codec_tag)
 380                 codec->codec_tag= mp_av_codec_get_tag(mp_bmp_taglists, codec->codec_id);
 381             bih->biSize= sizeof(*bih) + codec->extradata_size;
 382             bih->biWidth= codec->width;
 383             bih->biHeight= codec->height;
 384             bih->biBitCount= codec->bits_per_coded_sample;
 385             bih->biSizeImage = bih->biWidth * bih->biHeight * bih->biBitCount/8;
 386             bih->biCompression= codec->codec_tag;
 387             sh_video->bih= bih;
 388             sh_video->disp_w= codec->width;
 389             sh_video->disp_h= codec->height;
 390             if (st->time_base.den) { /* if container has time_base, use that */
 391                 sh_video->video.dwRate= st->time_base.den;
 392                 sh_video->video.dwScale= st->time_base.num;
 393             } else {
 394                 sh_video->video.dwRate= codec->time_base.den;
 395                 sh_video->video.dwScale= codec->time_base.num;
 396             }
 397             sh_video->fps=av_q2d(st->r_frame_rate);
 398             sh_video->frametime=1/av_q2d(st->r_frame_rate);
 399             sh_video->format=bih->biCompression;
 400             if(st->sample_aspect_ratio.num)
 401                 sh_video->aspect = codec->width  * st->sample_aspect_ratio.num
 402                          / (float)(codec->height * st->sample_aspect_ratio.den);
 403             else
 404                 sh_video->aspect=codec->width  * codec->sample_aspect_ratio.num
 405                        / (float)(codec->height * codec->sample_aspect_ratio.den);
 406             sh_video->i_bps=codec->bit_rate/8;
 407             if (title && title->value)
 408                 mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VID_%d_NAME=%s\n", priv->video_streams, title->value);
 409             mp_msg(MSGT_DEMUX,MSGL_DBG2,"aspect= %d*%d/(%d*%d)\n",
 410                 codec->width, codec->sample_aspect_ratio.num,
 411                 codec->height, codec->sample_aspect_ratio.den);
 412
 413             sh_video->ds= demuxer->video;
 414             if(codec->extradata_size)
 415                 memcpy(sh_video->bih + 1, codec->extradata, codec->extradata_size);
 416             if( mp_msg_test(MSGT_HEADER,MSGL_V) ) print_video_header(sh_video->bih, MSGL_V);
 417             /*
 418                 short biPlanes;
 419                 int  biXPelsPerMeter;
 420                 int  biYPelsPerMeter;
 421                 int biClrUsed;
 422                 int biClrImportant;
 423             */
 424             if(demuxer->video->id != i && demuxer->video->id != -1)
 425                 st->discard= AVDISCARD_ALL;
 426             else{
 427                 demuxer->video->id = i;
 428                 demuxer->video->sh= demuxer->v_streams[i];
 429             }
 430             stream_id = priv->video_streams++;
 431             break;
 432         }
 433         case CODEC_TYPE_SUBTITLE:{
 434             sh_sub_t* sh_sub;
 435             char type;
 436             /* only support text subtitles for now */
 437             if(codec->codec_id == CODEC_ID_TEXT)
 438                 type = 't';
 439             else if(codec->codec_id == CODEC_ID_MOV_TEXT)
 440                 type = 'm';
 441             else if(codec->codec_id == CODEC_ID_SSA)
 442                 type = 'a';
 443             else if(codec->codec_id == CODEC_ID_DVD_SUBTITLE)
 444                 type = 'v';
 445             else if(codec->codec_id == CODEC_ID_XSUB)
 446                 type = 'x';
 447             else if(codec->codec_id == CODEC_ID_DVB_SUBTITLE)
 448                 type = 'b';
 449             else if(codec->codec_id == CODEC_ID_DVB_TELETEXT)
 450                 type = 'd';
 451             else if(codec->codec_id == CODEC_ID_HDMV_PGS_SUBTITLE)
 452                 type = 'p';
 453             else
 454                 break;
 455             sh_sub = new_sh_sub_sid(demuxer, i, priv->sub_streams);
 456             if(!sh_sub) break;
 457             stream_type = "subtitle";
 458             priv->sstreams[priv->sub_streams] = i;
 459             sh_sub->type = type;
 460             if (codec->extradata_size) {
 461                 sh_sub->extradata = malloc(codec->extradata_size);
 462                 memcpy(sh_sub->extradata, codec->extradata, codec->extradata_size);
 463                 sh_sub->extradata_len = codec->extradata_size;
 464             }
 465             if (title && title->value)
 466                 mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SID_%d_NAME=%s\n", priv->sub_streams, title->value);
 467             if (lang && lang->value) {
 468               sh_sub->lang = strdup(lang->value);
 469               mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SID_%d_LANG=%s\n", priv->sub_streams, sh_sub->lang);
 470             }
 471             if (st->disposition & AV_DISPOSITION_DEFAULT)
 472               sh_sub->default_track = 1;
 473             stream_id = priv->sub_streams++;
 474             break;
 475         }
 476         case CODEC_TYPE_ATTACHMENT:{
 477             if (st->codec->codec_id == CODEC_ID_TTF)
 478                 demuxer_add_attachment(demuxer, BSTR(st->filename),
 479                                        BSTR("application/x-truetype-font"),
 480                                        (struct bstr){codec->extradata,
 481                                                      codec->extradata_size});
 482             break;
 483         }
 484         default:
 485             st->discard= AVDISCARD_ALL;
 486     }
 487     if (stream_type) {
 488         AVCodec *avc = avcodec_find_decoder(codec->codec_id);
 489         const char *codec_name = avc ? avc->name : "unknown";
 490         if (!avc && *stream_type == 's' && demuxer->s_streams[stream_id])
 491             codec_name = sh_sub_type2str(((sh_sub_t *)demuxer->s_streams[stream_id])->type);
 492         mp_msg(MSGT_DEMUX, MSGL_INFO, "[lavf] stream %d: %s (%s), -%cid %d", i, stream_type, codec_name, *stream_type, stream_id);
 493         if (lang && lang->value && *stream_type != 'v')
 494             mp_msg(MSGT_DEMUX, MSGL_INFO, ", -%clang %s", *stream_type, lang->value);
 495         if (title && title->value)
 496             mp_msg(MSGT_DEMUX, MSGL_INFO, ", %s", title->value);
 497         mp_msg(MSGT_DEMUX, MSGL_INFO, "\n");
 498     }
 499 }
 500
 501 static demuxer_t* demux_open_lavf(demuxer_t *demuxer){
 502     struct MPOpts *opts = demuxer->opts;
 503     struct lavfdopts *lavfdopts = &opts->lavfdopts;
 504     AVFormatContext *avfc;
 505     AVFormatParameters ap;
 506     const AVOption *opt;
 507     AVMetadataTag *t = NULL;
 508     lavf_priv_t *priv= demuxer->priv;
 509     int i;
 510     char mp_filename[256]="mp:";
 511
 512     memset(&ap, 0, sizeof(AVFormatParameters));
 513
 514     stream_seek(demuxer->stream, 0);
 515
 516     avfc = avformat_alloc_context();
 517
 518     if (lavfdopts->cryptokey)
 519         parse_cryptokey(avfc, lavfdopts->cryptokey);
 520     if (matches_avinputformat_name(priv, "avi")) {
 521         /* for avi libavformat returns the avi timestamps in .dts,
 522          * some made-up stuff that's not really pts in .pts */
 523         priv->use_dts = true;
 524     } else {
 525         if (opts->user_correct_pts != 0)
 526             avfc->flags |= AVFMT_FLAG_GENPTS;
 527     }
 528     if (index_mode == 0)
 529         avfc->flags |= AVFMT_FLAG_IGNIDX;
 530
 531     ap.prealloced_context = 1;
 532     if (lavfdopts->probesize) {
 533         opt = av_set_int(avfc, "probesize", lavfdopts->probesize);
 534         if(!opt) mp_msg(MSGT_HEADER,MSGL_ERR, "demux_lavf, couldn't set option probesize to %u\n", lavfdopts->probesize);
 535     }
 536     if (lavfdopts->analyzeduration) {
 537         opt = av_set_int(avfc, "analyzeduration",
 538                          lavfdopts->analyzeduration * AV_TIME_BASE);
 539         if (!opt)
 540             mp_msg(MSGT_HEADER, MSGL_ERR, "demux_lavf, couldn't set option "
 541                    "analyzeduration to %u\n", lavfdopts->analyzeduration);
 542     }
 543
 544     if (lavfdopts->avopt){
 545         if(parse_avopts(avfc, lavfdopts->avopt) < 0){
 546             mp_msg(MSGT_HEADER,MSGL_ERR, "Your options /%s/ look like gibberish to me pal\n", lavfdopts->avopt);
 547             return NULL;
 548         }
 549     }
 550
 551     if(demuxer->stream->url) {
 552         if (!strncmp(demuxer->stream->url, "ffmpeg://rtsp:", 14))
 553             av_strlcpy(mp_filename, demuxer->stream->url + 9, sizeof(mp_filename));
 554         else
 555             av_strlcat(mp_filename, demuxer->stream->url, sizeof(mp_filename));
 556     } else
 557         av_strlcat(mp_filename, "foobar.dummy", sizeof(mp_filename));
 558
 559     priv->pb = av_alloc_put_byte(priv->buffer, BIO_BUFFER_SIZE, 0,
 560                                  demuxer, mp_read, NULL, mp_seek);
 561     priv->pb->read_seek = mp_read_seek;
 562     priv->pb->is_streamed = !demuxer->stream->end_pos || (demuxer->stream->flags & MP_STREAM_SEEK) != MP_STREAM_SEEK;
 563
 564     if(av_open_input_stream(&avfc, priv->pb, mp_filename, priv->avif, &ap)<0){
 565         mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_open_input_stream() failed\n");
 566         return NULL;
 567     }
 568
 569     priv->avfc= avfc;
 570
 571     if(av_find_stream_info(avfc) < 0){
 572         mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_find_stream_info() failed\n");
 573         return NULL;
 574     }
 575
 576     /* Add metadata. */
 577     av_metadata_conv(avfc, NULL, avfc->iformat->metadata_conv);
 578     while((t = av_metadata_get(avfc->metadata, "", t, AV_METADATA_IGNORE_SUFFIX)))
 579         demux_info_add(demuxer, t->key, t->value);
 580
 581     for(i=0; i < avfc->nb_chapters; i++) {
 582         AVChapter *c = avfc->chapters[i];
 583         uint64_t start = av_rescale_q(c->start, c->time_base, (AVRational){1,1000});
 584         uint64_t end   = av_rescale_q(c->end, c->time_base, (AVRational){1,1000});
 585         t = av_metadata_get(c->metadata, "title", NULL, 0);
 586         demuxer_add_chapter(demuxer, t ? BSTR(t->value) : BSTR(NULL), start, end);
 587     }
 588
 589     for(i=0; i<avfc->nb_streams; i++)
 590         handle_stream(demuxer, avfc, i);
 591     priv->nb_streams_last = avfc->nb_streams;
 592
 593     if(avfc->nb_programs) {
 594         int p;
 595         for (p = 0; p < avfc->nb_programs; p++) {
 596             AVProgram *program = avfc->programs[p];
 597             t = av_metadata_get(program->metadata, "title", NULL, 0);
 598             mp_msg(MSGT_HEADER,MSGL_INFO,"LAVF: Program %d %s\n", program->id, t ? t->value : "");
 599             mp_msg(MSGT_IDENTIFY, MSGL_V, "PROGRAM_ID=%d\n", program->id);
 600         }
 601     }
 602
 603     mp_msg(MSGT_HEADER,MSGL_V,"LAVF: %d audio and %d video streams found\n",priv->audio_streams,priv->video_streams);
 604     mp_msg(MSGT_HEADER,MSGL_V,"LAVF: build %d\n", LIBAVFORMAT_BUILD);
 605     if(!priv->audio_streams) demuxer->audio->id=-2;  // nosound
 606 //    else if(best_audio > 0 && demuxer->audio->id == -1) demuxer->audio->id=best_audio;
 607     if(!priv->video_streams){
 608         if(!priv->audio_streams){
 609             mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF: no audio or video headers found - broken file?\n");
 610             return NULL;
 611         }
 612         demuxer->video->id=-2; // audio-only
 613     } //else if (best_video > 0 && demuxer->video->id == -1) demuxer->video->id = best_video;
 614
 615     demuxer->accurate_seek = true;
 616
 617     return demuxer;
 618 }
 619
 620 static void check_internet_radio_hack(struct demuxer *demuxer)
 621 {
 622     struct lavf_priv *priv = demuxer->priv;
 623     struct AVFormatContext *avfc = priv->avfc;
 624
 625     if (!matches_avinputformat_name(priv, "ogg"))
 626         return;
 627     if (priv->nb_streams_last == avfc->nb_streams)
 628         return;
 629     if (avfc->nb_streams - priv->nb_streams_last == 1
 630         && priv->video_streams == 0 && priv->sub_streams == 0
 631         && demuxer->a_streams[priv->audio_streams-1]->format == 0x566f // vorbis
 632         && (priv->audio_streams == 2 || priv->internet_radio_hack)
 633         && demuxer->a_streams[0]->format == 0x566f) {
 634         // extradata match could be checked but would require parsing
 635         // headers, as the comment section will vary
 636         if (!priv->internet_radio_hack) {
 637             mp_msg(MSGT_DEMUX, MSGL_V,
 638                    "[lavf] enabling internet ogg radio hack\n");
 639 #if LIBAVFORMAT_VERSION_MAJOR < 53
 640             mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[lavf] This looks like an "
 641                     "internet radio ogg stream with track changes.\n"
 642                     "Playback will likely fail after %d track changes "
 643                     "due to libavformat limitations.\n"
 644                     "You may be able to work around that limitation by "
 645                     "using -demuxer ogg.\n", MAX_STREAMS);
 646 #endif
 647         }
 648 #if LIBAVFORMAT_VERSION_MAJOR < 53
 649         if (avfc->nb_streams == MAX_STREAMS) {
 650             mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[lavf] This is the %dth "
 651                     "track.\nPlayback will likely fail at the next change.\n"
 652                     "You may be able to work around this limitation by "
 653                     "using -demuxer ogg.\n", MAX_STREAMS);
 654         }
 655 #endif
 656         priv->internet_radio_hack = true;
 657         // use new per-track metadata as global metadata
 658         AVMetadataTag *t = NULL;
 659         AVStream *stream = avfc->streams[avfc->nb_streams - 1];
 660         while ((t = av_metadata_get(stream->metadata, "", t,
 661                                    AV_METADATA_IGNORE_SUFFIX)))
 662             demux_info_add(demuxer, t->key, t->value);
 663     } else {
 664         if (priv->internet_radio_hack)
 665             mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[lavf] Internet radio ogg hack "
 666                     "was enabled, but stream characteristics changed.\n"
 667                     "This may or may not work.\n");
 668         priv->internet_radio_hack = false;
 669     }
 670 }
 671
 672 static int demux_lavf_fill_buffer(demuxer_t *demux, demux_stream_t *dsds){
 673     lavf_priv_t *priv= demux->priv;
 674     AVPacket pkt;
 675     demux_packet_t *dp;
 676     demux_stream_t *ds;
 677     int id;
 678     mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_lavf_fill_buffer()\n");
 679
 680     demux->filepos=stream_tell(demux->stream);
 681
 682     if(av_read_frame(priv->avfc, &pkt) < 0)
 683         return 0;
 684
 685     // handle any new streams that might have been added
 686     for (id = priv->nb_streams_last; id < priv->avfc->nb_streams; id++)
 687         handle_stream(demux, priv->avfc, id);
 688     check_internet_radio_hack(demux);
 689
 690     priv->nb_streams_last = priv->avfc->nb_streams;
 691
 692     id= pkt.stream_index;
 693
 694     if (id == demux->audio->id || priv->internet_radio_hack) {
 695         // audio
 696         ds=demux->audio;
 697         if(!ds->sh){
 698             ds->sh=demux->a_streams[id];
 699             mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF audio ID = %d\n",ds->id);
 700         }
 701     } else if(id==demux->video->id){
 702         // video
 703         ds=demux->video;
 704         if(!ds->sh){
 705             ds->sh=demux->v_streams[id];
 706             mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF video ID = %d\n",ds->id);
 707         }
 708     } else if(id==demux->sub->id){
 709         // subtitle
 710         ds=demux->sub;
 711         sub_utf8=1;
 712     } else {
 713         av_free_packet(&pkt);
 714         return 1;
 715     }
 716
 717     if(0/*pkt.destruct == av_destruct_packet*/){
 718         //ok kids, dont try this at home :)
 719         dp=malloc(sizeof(demux_packet_t));
 720         dp->len=pkt.size;
 721         dp->next=NULL;
 722         dp->refcount=1;
 723         dp->master=NULL;
 724         dp->buffer=pkt.data;
 725         pkt.destruct= NULL;
 726     }else{
 727         dp=new_demux_packet(pkt.size);
 728         memcpy(dp->buffer, pkt.data, pkt.size);
 729         av_free_packet(&pkt);
 730     }
 731
 732     int64_t ts = priv->use_dts ? pkt.dts : pkt.pts;
 733     if(ts != AV_NOPTS_VALUE){
 734         dp->pts = ts * av_q2d(priv->avfc->streams[id]->time_base);
 735         priv->last_pts= dp->pts * AV_TIME_BASE;
 736         // always set endpts for subtitles, even if PKT_FLAG_KEY is not set,
 737         // otherwise they will stay on screen to long if e.g. ASS is demuxed from mkv
 738         if((ds == demux->sub || (pkt.flags & PKT_FLAG_KEY)) &&
 739            pkt.convergence_duration > 0)
 740             dp->endpts = dp->pts + pkt.convergence_duration * av_q2d(priv->avfc->streams[id]->time_base);
 741     }
 742     dp->pos=demux->filepos;
 743     dp->flags= !!(pkt.flags&PKT_FLAG_KEY);
 744     // append packet to DS stream:
 745     ds_add_packet(ds,dp);
 746     return 1;
 747 }
 748
 749 static void demux_seek_lavf(demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags){
 750     lavf_priv_t *priv = demuxer->priv;
 751     int avsflags = 0;
 752     mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_seek_lavf(%p, %f, %f, %d)\n", demuxer, rel_seek_secs, audio_delay, flags);
 753
 754     if (flags & SEEK_ABSOLUTE) {
 755       priv->last_pts = 0;
 756     } else {
 757       if (rel_seek_secs < 0) avsflags = AVSEEK_FLAG_BACKWARD;
 758     }
 759     if (flags & SEEK_FORWARD)
 760         avsflags = 0;
 761     else if (flags & SEEK_BACKWARD)
 762         avsflags = AVSEEK_FLAG_BACKWARD;
 763     if (flags & SEEK_FACTOR) {
 764       if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 765         return;
 766       priv->last_pts += rel_seek_secs * priv->avfc->duration;
 767     } else {
 768       priv->last_pts += rel_seek_secs * AV_TIME_BASE;
 769     }
 770     if (av_seek_frame(priv->avfc, -1, priv->last_pts, avsflags) < 0) {
 771         avsflags ^= AVSEEK_FLAG_BACKWARD;
 772         av_seek_frame(priv->avfc, -1, priv->last_pts, avsflags);
 773     }
 774 }
 775
 776 static int demux_lavf_control(demuxer_t *demuxer, int cmd, void *arg)
 777 {
 778     lavf_priv_t *priv = demuxer->priv;
 779
 780     switch (cmd) {
 781         case DEMUXER_CTRL_CORRECT_PTS:
 782             return DEMUXER_CTRL_OK;
 783         case DEMUXER_CTRL_GET_TIME_LENGTH:
 784             if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 785                 return DEMUXER_CTRL_DONTKNOW;
 786
 787             *((double *)arg) = (double)priv->avfc->duration / AV_TIME_BASE;
 788             return DEMUXER_CTRL_OK;
 789
 790         case DEMUXER_CTRL_GET_PERCENT_POS:
 791             if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
 792                 return DEMUXER_CTRL_DONTKNOW;
 793
 794             *((int *)arg) = (int)((priv->last_pts - priv->avfc->start_time)*100 / priv->avfc->duration);
 795             return DEMUXER_CTRL_OK;
 796         case DEMUXER_CTRL_SWITCH_AUDIO:
 797         case DEMUXER_CTRL_SWITCH_VIDEO:
 798         {
 799             int id = *((int*)arg);
 800             int newid = -2;
 801             int i, curridx = -1;
 802             int nstreams, *pstreams;
 803             demux_stream_t *ds;
 804
 805             if(cmd == DEMUXER_CTRL_SWITCH_VIDEO)
 806             {
 807                 ds = demuxer->video;
 808                 nstreams = priv->video_streams;
 809                 pstreams = priv->vstreams;
 810             }
 811             else
 812             {
 813                 ds = demuxer->audio;
 814                 nstreams = priv->audio_streams;
 815                 pstreams = priv->astreams;
 816             }
 817             for(i = 0; i < nstreams; i++)
 818             {
 819                 if(pstreams[i] == ds->id) //current stream id
 820                 {
 821                     curridx = i;
 822                     break;
 823                 }
 824             }
 825
 826             if(id == -2) { // no sound
 827                 i = -1;
 828             } else if(id == -1) { // next track
 829                 i = (curridx + 2) % (nstreams + 1) - 1;
 830                 if (i >= 0)
 831                     newid = pstreams[i];
 832             }
 833             else // select track by id
 834             {
 835                 if (id >= 0 && id < nstreams) {
 836                     i = id;
 837                     newid = pstreams[i];
 838                 }
 839             }
 840             if (i == curridx) {
 841                 *(int *) arg = curridx;
 842                 return DEMUXER_CTRL_OK;
 843             } else {
 844                 ds_free_packs(ds);
 845                 if(ds->id >= 0)
 846                     priv->avfc->streams[ds->id]->discard = AVDISCARD_ALL;
 847                 ds->id = newid;
 848                 *(int *) arg = i < 0 ? -2 : i;
 849                 if(newid >= 0)
 850                     priv->avfc->streams[newid]->discard = AVDISCARD_NONE;
 851                 return DEMUXER_CTRL_OK;
 852             }
 853         }
 854         case DEMUXER_CTRL_IDENTIFY_PROGRAM:
 855         {
 856             demux_program_t *prog = arg;
 857             AVProgram *program;
 858             int p, i;
 859             int start;
 860
 861             prog->vid = prog->aid = prog->sid = -2;     //no audio and no video by default
 862             if(priv->avfc->nb_programs < 1)
 863                 return DEMUXER_CTRL_DONTKNOW;
 864
 865             if(prog->progid == -1)
 866             {
 867                 p = 0;
 868                 while(p<priv->avfc->nb_programs && priv->avfc->programs[p]->id != priv->cur_program)
 869                     p++;
 870                 p = (p + 1) % priv->avfc->nb_programs;
 871             }
 872             else
 873             {
 874                 for(i=0; i<priv->avfc->nb_programs; i++)
 875                     if(priv->avfc->programs[i]->id == prog->progid)
 876                         break;
 877                 if(i==priv->avfc->nb_programs)
 878                     return DEMUXER_CTRL_DONTKNOW;
 879                 p = i;
 880             }
 881             start = p;
 882 redo:
 883             program = priv->avfc->programs[p];
 884             for(i=0; i<program->nb_stream_indexes; i++)
 885             {
 886                 switch(priv->avfc->streams[program->stream_index[i]]->codec->codec_type)
 887                 {
 888                     case CODEC_TYPE_VIDEO:
 889                         if(prog->vid == -2)
 890                             prog->vid = program->stream_index[i];
 891                         break;
 892                     case CODEC_TYPE_AUDIO:
 893                         if(prog->aid == -2)
 894                             prog->aid = program->stream_index[i];
 895                         break;
 896                     case CODEC_TYPE_SUBTITLE:
 897                         if(prog->sid == -2 && priv->avfc->streams[program->stream_index[i]]->codec->codec_id == CODEC_ID_TEXT)
 898                             prog->sid = program->stream_index[i];
 899                         break;
 900                 }
 901             }
 902             if(prog->progid == -1 && prog->vid == -2 && prog->aid == -2)
 903             {
 904                 p = (p + 1) % priv->avfc->nb_programs;
 905                 if (p == start)
 906                     return DEMUXER_CTRL_DONTKNOW;
 907                 goto redo;
 908             }
 909             priv->cur_program = prog->progid = program->id;
 910             return DEMUXER_CTRL_OK;
 911         }
 912         default:
 913             return DEMUXER_CTRL_NOTIMPL;
 914     }
 915 }
 916
 917 static void demux_close_lavf(demuxer_t *demuxer)
 918 {
 919     lavf_priv_t* priv = demuxer->priv;
 920     if (priv){
 921         if(priv->avfc)
 922        {
 923          av_freep(&priv->avfc->key);
 924          av_close_input_stream(priv->avfc);
 925         }
 926         av_freep(&priv->pb);
 927         free(priv); demuxer->priv= NULL;
 928     }
 929 }
 930
 931
 932 const demuxer_desc_t demuxer_desc_lavf = {
 933   "libavformat demuxer",
 934   "lavf",
 935   "libavformat",
 936   "Michael Niedermayer",
 937   "supports many formats, requires libavformat",
 938   DEMUXER_TYPE_LAVF,
 939   0, // Check after other demuxer
 940   lavf_check_file,
 941   demux_lavf_fill_buffer,
 942   demux_open_lavf,
 943   demux_close_lavf,
 944   demux_seek_lavf,
 945   demux_lavf_control
 946 };
 947
 948 const demuxer_desc_t demuxer_desc_lavf_preferred = {
 949   "libavformat preferred demuxer",
 950   "lavfpref",
 951   "libavformat",
 952   "Michael Niedermayer",
 953   "supports many formats, requires libavformat",
 954   DEMUXER_TYPE_LAVF_PREFERRED,
 955   1,
 956   lavf_check_preferred_file,
 957   demux_lavf_fill_buffer,
 958   demux_open_lavf,
 959   demux_close_lavf,
 960   demux_seek_lavf,
 961   demux_lavf_control
 962 };