git.sesse.net Git - vlc/blob - modules/demux/avformat/demux.c

   1 /*****************************************************************************
   2  * demux.c: demuxer using ffmpeg (libavformat).
   3  *****************************************************************************
   4  * Copyright (C) 2004-2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_demux.h>
  35 #include <vlc_stream.h>
  36 #include <vlc_meta.h>
  37 #include <vlc_input.h>
  38 #include <vlc_charset.h>
  39 #include <vlc_avcodec.h>
  40
  41 /* ffmpeg header */
  42 #if defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
  43 #   include <libavformat/avformat.h>
  44 #elif defined(HAVE_FFMPEG_AVFORMAT_H)
  45 #   include <ffmpeg/avformat.h>
  46 #endif
  47
  48 #include "../../codec/avcodec/avcodec.h"
  49 #include "avformat.h"
  50 #include "../xiph.h"
  51 #include "../vobsub.h"
  52
  53 //#define AVFORMAT_DEBUG 1
  54
  55 /* Version checking */
  56 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
  57
  58 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(50<<8)+0) )
  59 #   define HAVE_FFMPEG_CODEC_ATTACHMENT 1
  60 #endif
  61
  62 /*****************************************************************************
  63  * demux_sys_t: demux descriptor
  64  *****************************************************************************/
  65 struct demux_sys_t
  66 {
  67     ByteIOContext   io;
  68     int             io_buffer_size;
  69     uint8_t        *io_buffer;
  70
  71     AVInputFormat  *fmt;
  72     AVFormatContext *ic;
  73     URLContext     url;
  74     URLProtocol    prot;
  75
  76     int             i_tk;
  77     es_out_id_t     **tk;
  78
  79     int64_t     i_pcr;
  80     int64_t     i_pcr_inc;
  81     int         i_pcr_tk;
  82
  83     unsigned    i_ssa_order;
  84
  85     int                i_attachments;
  86     input_attachment_t **attachments;
  87
  88     /* Only one title with seekpoints possible atm. */
  89     input_title_t *p_title;
  90 };
  91
  92 /*****************************************************************************
  93  * Local prototypes
  94  *****************************************************************************/
  95 static int Demux  ( demux_t *p_demux );
  96 static int Control( demux_t *p_demux, int i_query, va_list args );
  97
  98 static int IORead( void *opaque, uint8_t *buf, int buf_size );
  99 static int64_t IOSeek( void *opaque, int64_t offset, int whence );
 100
 101 static block_t *BuildSsaFrame( const AVPacket *p_pkt, unsigned i_order );
 102 static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time );
 103
 104 /*****************************************************************************
 105  * Open
 106  *****************************************************************************/
 107 int OpenDemux( vlc_object_t *p_this )
 108 {
 109     demux_t       *p_demux = (demux_t*)p_this;
 110     demux_sys_t   *p_sys;
 111     AVProbeData   pd;
 112     AVInputFormat *fmt;
 113     unsigned int  i;
 114     int64_t       i_start_time = -1;
 115     bool          b_can_seek;
 116     char         *psz_url;
 117
 118     if( p_demux->psz_file )
 119         psz_url = strdup( p_demux->psz_file );
 120     else
 121     {
 122         if( asprintf( &psz_url, "%s://%s", p_demux->psz_access, p_demux->psz_location ) == -1)
 123             return VLC_ENOMEM;
 124     }
 125     msg_Dbg( p_demux, "trying url: %s", psz_url );
 126     /* Init Probe data */
 127     pd.filename = psz_url;
 128     if( ( pd.buf_size = stream_Peek( p_demux->s, &pd.buf, 2048 + 213 ) ) <= 0 )
 129     {
 130         free( psz_url );
 131         msg_Warn( p_demux, "cannot peek" );
 132         return VLC_EGENERIC;
 133     }
 134
 135     vlc_avcodec_lock();
 136     av_register_all(); /* Can be called several times */
 137     vlc_avcodec_unlock();
 138
 139     /* Guess format */
 140     if( !( fmt = av_probe_input_format( &pd, 1 ) ) )
 141     {
 142         msg_Dbg( p_demux, "couldn't guess format" );
 143         free( psz_url );
 144         return VLC_EGENERIC;
 145     }
 146
 147     /* Don't try to handle MPEG unless forced */
 148     if( !p_demux->b_force &&
 149         ( !strcmp( fmt->name, "mpeg" ) ||
 150           !strcmp( fmt->name, "vcd" ) ||
 151           !strcmp( fmt->name, "vob" ) ||
 152           !strcmp( fmt->name, "mpegts" ) ||
 153           /* libavformat's redirector won't work */
 154           !strcmp( fmt->name, "redir" ) ||
 155           !strcmp( fmt->name, "sdp" ) ) )
 156     {
 157         free( psz_url );
 158         return VLC_EGENERIC;
 159     }
 160
 161     /* Don't trigger false alarms on bin files */
 162     if( !p_demux->b_force && !strcmp( fmt->name, "psxstr" ) )
 163     {
 164         int i_len;
 165
 166         if( !p_demux->psz_file )
 167         {
 168             free( psz_url );
 169             return VLC_EGENERIC;
 170         }
 171
 172         i_len = strlen( p_demux->psz_file );
 173         if( i_len < 4 )
 174         {
 175             free( psz_url );
 176             return VLC_EGENERIC;
 177         }
 178
 179         if( strcasecmp( &p_demux->psz_file[i_len - 4], ".str" ) &&
 180             strcasecmp( &p_demux->psz_file[i_len - 4], ".xai" ) &&
 181             strcasecmp( &p_demux->psz_file[i_len - 3], ".xa" ) )
 182         {
 183             free( psz_url );
 184             return VLC_EGENERIC;
 185         }
 186     }
 187
 188     msg_Dbg( p_demux, "detected format: %s", fmt->name );
 189
 190     /* Fill p_demux fields */
 191     p_demux->pf_demux = Demux;
 192     p_demux->pf_control = Control;
 193     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 194     p_sys->ic = 0;
 195     p_sys->fmt = fmt;
 196     p_sys->i_tk = 0;
 197     p_sys->tk = NULL;
 198     p_sys->i_pcr_tk = -1;
 199     p_sys->i_pcr = -1;
 200     p_sys->i_ssa_order = 0;
 201     TAB_INIT( p_sys->i_attachments, p_sys->attachments);
 202     p_sys->p_title = NULL;
 203
 204     /* Create I/O wrapper */
 205     p_sys->io_buffer_size = 32768;  /* FIXME */
 206     p_sys->io_buffer = malloc( p_sys->io_buffer_size );
 207     p_sys->url.priv_data = p_demux;
 208     p_sys->url.prot = &p_sys->prot;
 209     p_sys->url.prot->name = "VLC I/O wrapper";
 210     p_sys->url.prot->url_open = 0;
 211     p_sys->url.prot->url_read =
 212                     (int (*) (URLContext *, unsigned char *, int))IORead;
 213     p_sys->url.prot->url_write = 0;
 214     p_sys->url.prot->url_seek =
 215                     (int64_t (*) (URLContext *, int64_t, int))IOSeek;
 216     p_sys->url.prot->url_close = 0;
 217     p_sys->url.prot->next = 0;
 218     init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
 219                    0, &p_sys->url, IORead, NULL, IOSeek );
 220
 221     stream_Control( p_demux->s, STREAM_CAN_SEEK, &b_can_seek );
 222     if( !b_can_seek )
 223     {
 224        /* Tell avformat that input is stream, so it doesn't get stuck
 225        when trying av_find_stream_info() trying to seek all the wrong places
 226        init_put_byte defaults io.is_streamed=0, so thats why we set them after it
 227        */
 228        p_sys->url.is_streamed = 1;
 229        p_sys->io.is_streamed = 1;
 230     }
 231
 232
 233     /* Open it */
 234     if( av_open_input_stream( &p_sys->ic, &p_sys->io, psz_url,
 235                               p_sys->fmt, NULL ) )
 236     {
 237         msg_Err( p_demux, "av_open_input_stream failed" );
 238         free( psz_url );
 239         CloseDemux( p_this );
 240         return VLC_EGENERIC;
 241     }
 242     free( psz_url );
 243     psz_url = NULL;
 244
 245     vlc_avcodec_lock(); /* avformat calls avcodec behind our back!!! */
 246     if( av_find_stream_info( p_sys->ic ) < 0 )
 247     {
 248         msg_Warn( p_demux, "av_find_stream_info failed" );
 249     }
 250     vlc_avcodec_unlock();
 251
 252     for( i = 0; i < p_sys->ic->nb_streams; i++ )
 253     {
 254         AVStream *s = p_sys->ic->streams[i];
 255         AVCodecContext *cc = s->codec;
 256
 257         es_out_id_t  *es;
 258         es_format_t  fmt;
 259         vlc_fourcc_t fcc;
 260         const char *psz_type = "unknown";
 261
 262         if( !GetVlcFourcc( cc->codec_id, NULL, &fcc, NULL ) )
 263             fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
 264
 265         switch( cc->codec_type )
 266         {
 267         case CODEC_TYPE_AUDIO:
 268             es_format_Init( &fmt, AUDIO_ES, fcc );
 269             fmt.i_bitrate = cc->bit_rate;
 270             fmt.audio.i_channels = cc->channels;
 271             fmt.audio.i_rate = cc->sample_rate;
 272             fmt.audio.i_bitspersample = cc->bits_per_coded_sample;
 273             fmt.audio.i_blockalign = cc->block_align;
 274             psz_type = "audio";
 275             break;
 276
 277         case CODEC_TYPE_VIDEO:
 278             es_format_Init( &fmt, VIDEO_ES, fcc );
 279
 280             /* Special case for raw video data */
 281             if( cc->codec_id == CODEC_ID_RAWVIDEO )
 282             {
 283                 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
 284                 if( GetVlcChroma( &fmt.video, cc->pix_fmt ) != VLC_SUCCESS)
 285                 {
 286                     msg_Err( p_demux, "was unable to find a FourCC match for raw video" );
 287                 }
 288                 else
 289                     fmt.i_codec = fmt.video.i_chroma;
 290             }
 291             /* We need this for the h264 packetizer */
 292             else if( cc->codec_id == CODEC_ID_H264 && ( !strcmp( p_sys->fmt->name, "flv" ) ||
 293                 !strcmp( p_sys->fmt->name, "matroska" ) || !strcmp( p_sys->fmt->name, "mp4" ) ) )
 294                 fmt.i_original_fourcc = VLC_FOURCC( 'a', 'v', 'c', '1' );
 295
 296             fmt.video.i_width = cc->width;
 297             fmt.video.i_height = cc->height;
 298             if( cc->palctrl )
 299             {
 300                 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
 301                 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
 302             }
 303             psz_type = "video";
 304             fmt.video.i_frame_rate = cc->time_base.den;
 305             fmt.video.i_frame_rate_base = cc->time_base.num;
 306             break;
 307
 308         case CODEC_TYPE_SUBTITLE:
 309             es_format_Init( &fmt, SPU_ES, fcc );
 310             if( strncmp( p_sys->ic->iformat->name, "matroska", 8 ) == 0 &&
 311                 cc->codec_id == CODEC_ID_DVD_SUBTITLE &&
 312                 cc->extradata != NULL &&
 313                 cc->extradata_size > 0 )
 314             {
 315                 char *psz_start;
 316                 char *psz_buf = malloc( cc->extradata_size + 1);
 317                 if( psz_buf != NULL )
 318                 {
 319                     memcpy( psz_buf, cc->extradata , cc->extradata_size );
 320                     psz_buf[cc->extradata_size] = '\0';
 321
 322                     psz_start = strstr( psz_buf, "size:" );
 323                     if( psz_start &&
 324                         vobsub_size_parse( psz_start,
 325                                            &fmt.subs.spu.i_original_frame_width,
 326                                            &fmt.subs.spu.i_original_frame_height ) == VLC_SUCCESS )
 327                     {
 328                         msg_Dbg( p_demux, "original frame size: %dx%d",
 329                                  fmt.subs.spu.i_original_frame_width,
 330                                  fmt.subs.spu.i_original_frame_height );
 331                     }
 332                     else
 333                     {
 334                         msg_Warn( p_demux, "reading original frame size failed" );
 335                     }
 336
 337                     psz_start = strstr( psz_buf, "palette:" );
 338                     if( psz_start &&
 339                         vobsub_palette_parse( psz_start, &fmt.subs.spu.palette[1] ) == VLC_SUCCESS )
 340                     {
 341                         fmt.subs.spu.palette[0] =  0xBeef;
 342                         msg_Dbg( p_demux, "vobsub palette read" );
 343                     }
 344                     else
 345                     {
 346                         msg_Warn( p_demux, "reading original palette failed" );
 347                     }
 348                     free( psz_buf );
 349                 }
 350             }
 351
 352             psz_type = "subtitle";
 353             break;
 354
 355         default:
 356             es_format_Init( &fmt, UNKNOWN_ES, 0 );
 357 #ifdef HAVE_FFMPEG_CODEC_ATTACHMENT
 358             if( cc->codec_type == CODEC_TYPE_ATTACHMENT )
 359             {
 360                 input_attachment_t *p_attachment;
 361                 psz_type = "attachment";
 362                 if( cc->codec_id == CODEC_ID_TTF )
 363                 {
 364                     p_attachment = vlc_input_attachment_New( s->filename, "application/x-truetype-font", NULL,
 365                                              cc->extradata, (int)cc->extradata_size );
 366                     TAB_APPEND( p_sys->i_attachments, p_sys->attachments, p_attachment );
 367                 }
 368                 else msg_Warn( p_demux, "unsupported attachment type in ffmpeg demux" );
 369             }
 370             break;
 371 #endif
 372
 373             if( cc->codec_type == CODEC_TYPE_DATA )
 374                 psz_type = "data";
 375
 376             msg_Warn( p_demux, "unsupported track type in ffmpeg demux" );
 377             break;
 378         }
 379         fmt.psz_language = strdup( s->language );
 380         if( s->disposition & AV_DISPOSITION_DEFAULT )
 381             fmt.i_priority = 1000;
 382
 383 #ifdef HAVE_FFMPEG_CODEC_ATTACHMENT
 384         if( cc->codec_type != CODEC_TYPE_ATTACHMENT )
 385 #endif
 386         {
 387             const bool    b_ogg = !strcmp( p_sys->fmt->name, "ogg" );
 388             const uint8_t *p_extra = cc->extradata;
 389             unsigned      i_extra  = cc->extradata_size;
 390
 391             if( cc->codec_id == CODEC_ID_THEORA && b_ogg )
 392             {
 393                 unsigned pi_size[3];
 394                 void     *pp_data[3];
 395                 unsigned i_count;
 396                 for( i_count = 0; i_count < 3; i_count++ )
 397                 {
 398                     if( i_extra < 2 )
 399                         break;
 400                     pi_size[i_count] = GetWBE( p_extra );
 401                     pp_data[i_count] = (uint8_t*)&p_extra[2];
 402                     if( i_extra < pi_size[i_count] + 2 )
 403                         break;
 404
 405                     p_extra += 2 + pi_size[i_count];
 406                     i_extra -= 2 + pi_size[i_count];
 407                 }
 408                 if( i_count > 0 && xiph_PackHeaders( &fmt.i_extra, &fmt.p_extra,
 409                                                      pi_size, pp_data, i_count ) )
 410                 {
 411                     fmt.i_extra = 0;
 412                     fmt.p_extra = NULL;
 413                 }
 414             }
 415             else if( cc->codec_id == CODEC_ID_SPEEX && b_ogg )
 416             {
 417                 uint8_t p_dummy_comment[] = {
 418                     0, 0, 0, 0,
 419                     0, 0, 0, 0,
 420                 };
 421                 unsigned pi_size[2];
 422                 void     *pp_data[2];
 423
 424                 pi_size[0] = i_extra;
 425                 pp_data[0] = (uint8_t*)p_extra;
 426
 427                 pi_size[1] = sizeof(p_dummy_comment);
 428                 pp_data[1] = p_dummy_comment;
 429
 430                 if( pi_size[0] > 0 && xiph_PackHeaders( &fmt.i_extra, &fmt.p_extra,
 431                                                         pi_size, pp_data, 2 ) )
 432                 {
 433                     fmt.i_extra = 0;
 434                     fmt.p_extra = NULL;
 435                 }
 436             }
 437             else if( cc->extradata_size > 0 )
 438             {
 439                 fmt.p_extra = malloc( i_extra );
 440                 if( fmt.p_extra )
 441                 {
 442                     fmt.i_extra = i_extra;
 443                     memcpy( fmt.p_extra, p_extra, i_extra );
 444                 }
 445             }
 446         }
 447         es = es_out_Add( p_demux->out, &fmt );
 448         if( s->disposition & AV_DISPOSITION_DEFAULT )
 449             es_out_Control( p_demux->out, ES_OUT_SET_ES_DEFAULT, es );
 450         es_format_Clean( &fmt );
 451
 452         msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
 453                  psz_type, (char*)&fcc );
 454         TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
 455     }
 456     if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 457         i_start_time = p_sys->ic->start_time * 1000000 / AV_TIME_BASE;
 458
 459     msg_Dbg( p_demux, "AVFormat supported stream" );
 460     msg_Dbg( p_demux, "    - format = %s (%s)",
 461              p_sys->fmt->name, p_sys->fmt->long_name );
 462     msg_Dbg( p_demux, "    - start time = %"PRId64, i_start_time );
 463     msg_Dbg( p_demux, "    - duration = %"PRId64,
 464              ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
 465              p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
 466
 467     if( p_sys->ic->nb_chapters > 0 )
 468         p_sys->p_title = vlc_input_title_New();
 469     for( i = 0; i < p_sys->ic->nb_chapters; i++ )
 470     {
 471         seekpoint_t *s = vlc_seekpoint_New();
 472
 473         if( p_sys->ic->chapters[i]->title )
 474         {
 475             s->psz_name = strdup( p_sys->ic->chapters[i]->title );
 476             EnsureUTF8( s->psz_name );
 477             msg_Dbg( p_demux, "    - chapter %d: %s", i, s->psz_name );
 478         }
 479         s->i_time_offset = p_sys->ic->chapters[i]->start * 1000000 *
 480             p_sys->ic->chapters[i]->time_base.num /
 481             p_sys->ic->chapters[i]->time_base.den -
 482             (i_start_time != -1 ? i_start_time : 0 );
 483         TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s );
 484     }
 485
 486     return VLC_SUCCESS;
 487 }
 488
 489 /*****************************************************************************
 490  * Close
 491  *****************************************************************************/
 492 void CloseDemux( vlc_object_t *p_this )
 493 {
 494     demux_t     *p_demux = (demux_t*)p_this;
 495     demux_sys_t *p_sys = p_demux->p_sys;
 496
 497     FREENULL( p_sys->tk );
 498
 499     if( p_sys->ic ) av_close_input_stream( p_sys->ic );
 500
 501     for( int i = 0; i < p_sys->i_attachments; i++ )
 502         free( p_sys->attachments[i] );
 503     TAB_CLEAN( p_sys->i_attachments, p_sys->attachments);
 504
 505     if( p_sys->p_title )
 506         vlc_input_title_Delete( p_sys->p_title );
 507
 508     free( p_sys->io_buffer );
 509     free( p_sys );
 510 }
 511
 512 /*****************************************************************************
 513  * Demux:
 514  *****************************************************************************/
 515 static int Demux( demux_t *p_demux )
 516 {
 517     demux_sys_t *p_sys = p_demux->p_sys;
 518     AVPacket    pkt;
 519     block_t     *p_frame;
 520     int64_t     i_start_time;
 521
 522     /* Read a frame */
 523     if( av_read_frame( p_sys->ic, &pkt ) )
 524     {
 525         return 0;
 526     }
 527     if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
 528     {
 529         av_free_packet( &pkt );
 530         return 1;
 531     }
 532     const AVStream *p_stream = p_sys->ic->streams[pkt.stream_index];
 533     if( p_stream->time_base.den <= 0 )
 534     {
 535         msg_Warn( p_demux, "Invalid time base for the stream %d", pkt.stream_index );
 536         av_free_packet( &pkt );
 537         return 1;
 538     }
 539     if( p_stream->codec->codec_id == CODEC_ID_SSA )
 540     {
 541         p_frame = BuildSsaFrame( &pkt, p_sys->i_ssa_order++ );
 542         if( !p_frame )
 543         {
 544             av_free_packet( &pkt );
 545             return 1;
 546         }
 547     }
 548     else
 549     {
 550         if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
 551         {
 552             av_free_packet( &pkt );
 553             return 0;
 554         }
 555         memcpy( p_frame->p_buffer, pkt.data, pkt.size );
 556     }
 557
 558     if( pkt.flags & PKT_FLAG_KEY )
 559         p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
 560
 561     i_start_time = ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
 562         ( p_sys->ic->start_time * 1000000 / AV_TIME_BASE )  : 0;
 563
 564     p_frame->i_dts = ( pkt.dts == (int64_t)AV_NOPTS_VALUE ) ?
 565         VLC_TS_INVALID : (pkt.dts) * 1000000 *
 566         p_stream->time_base.num /
 567         p_stream->time_base.den - i_start_time + VLC_TS_0;
 568     p_frame->i_pts = ( pkt.pts == (int64_t)AV_NOPTS_VALUE ) ?
 569         VLC_TS_INVALID : (pkt.pts) * 1000000 *
 570         p_stream->time_base.num /
 571         p_stream->time_base.den - i_start_time + VLC_TS_0;
 572     if( pkt.duration > 0 && p_frame->i_length <= 0 )
 573         p_frame->i_length = pkt.duration * 1000000 *
 574             p_stream->time_base.num /
 575             p_stream->time_base.den;
 576
 577     if( pkt.dts != AV_NOPTS_VALUE && pkt.dts == pkt.pts &&
 578         p_stream->codec->codec_type == CODEC_TYPE_VIDEO )
 579     {
 580         /* Add here notoriously bugged file formats/samples regarding PTS */
 581         if( !strcmp( p_sys->fmt->name, "flv" ) )
 582             p_frame->i_pts = VLC_TS_INVALID;
 583     }
 584 #ifdef AVFORMAT_DEBUG
 585     msg_Dbg( p_demux, "tk[%d] dts=%"PRId64" pts=%"PRId64,
 586              pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
 587 #endif
 588
 589     if( p_frame->i_dts > VLC_TS_INVALID  &&
 590         ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
 591     {
 592         p_sys->i_pcr_tk = pkt.stream_index;
 593         p_sys->i_pcr = p_frame->i_dts;
 594
 595         es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
 596     }
 597
 598     es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
 599
 600     UpdateSeekPoint( p_demux, p_sys->i_pcr);
 601     av_free_packet( &pkt );
 602     return 1;
 603 }
 604
 605 static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time )
 606 {
 607     demux_sys_t *p_sys = p_demux->p_sys;
 608     int i;
 609
 610     if( !p_sys->p_title )
 611         return;
 612
 613     for( i = 0; i < p_sys->p_title->i_seekpoint; i++ )
 614     {
 615         if( i_time < p_sys->p_title->seekpoint[i]->i_time_offset )
 616             break;
 617     }
 618     i--;
 619
 620     if( i != p_demux->info.i_seekpoint && i >= 0 )
 621     {
 622         p_demux->info.i_seekpoint = i;
 623         p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 624     }
 625 }
 626
 627 static block_t *BuildSsaFrame( const AVPacket *p_pkt, unsigned i_order )
 628 {
 629     if( p_pkt->size <= 0 )
 630         return NULL;
 631
 632     char buffer[256];
 633     const size_t i_buffer_size = __MIN( sizeof(buffer) - 1, p_pkt->size );
 634     memcpy( buffer, p_pkt->data, i_buffer_size );
 635     buffer[i_buffer_size] = '\0';
 636
 637     /* */
 638     int i_layer;
 639     int h0, m0, s0, c0;
 640     int h1, m1, s1, c1;
 641     int i_position = 0;
 642     if( sscanf( buffer, "Dialogue: %d,%d:%d:%d.%d,%d:%d:%d.%d,%n", &i_layer,
 643                 &h0, &m0, &s0, &c0, &h1, &m1, &s1, &c1, &i_position ) < 9 )
 644         return NULL;
 645     if( i_position <= 0 || i_position >= i_buffer_size )
 646         return NULL;
 647
 648     char *p;
 649     if( asprintf( &p, "%u,%d,%.*s", i_order, i_layer, p_pkt->size - i_position, p_pkt->data + i_position ) < 0 )
 650         return NULL;
 651
 652     block_t *p_frame = block_heap_Alloc( p, p, strlen(p) + 1 );
 653     if( p_frame )
 654         p_frame->i_length = CLOCK_FREQ * ((h1 - h1) * 3600 +
 655                                           (m1-m0) * 60 +
 656                                           (s1-s0) * 1) +
 657                             CLOCK_FREQ * (c1-c0) / 100;
 658     return p_frame;
 659 }
 660
 661 /*****************************************************************************
 662  * Control:
 663  *****************************************************************************/
 664 static int Control( demux_t *p_demux, int i_query, va_list args )
 665 {
 666     demux_sys_t *p_sys = p_demux->p_sys;
 667     double f, *pf;
 668     int64_t i64, *pi64;
 669
 670     switch( i_query )
 671     {
 672         case DEMUX_GET_POSITION:
 673             pf = (double*) va_arg( args, double* ); *pf = 0.0;
 674             i64 = stream_Size( p_demux->s );
 675             if( i64 > 0 )
 676             {
 677                 double current = stream_Tell( p_demux->s );
 678                 *pf = current / (double)i64;
 679             }
 680
 681             if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
 682             {
 683                 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
 684             }
 685
 686             return VLC_SUCCESS;
 687
 688         case DEMUX_SET_POSITION:
 689             f = (double) va_arg( args, double );
 690             if( p_sys->i_pcr > 0 )
 691             {
 692                 i64 = p_sys->ic->duration * f;
 693                 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 694                     i64 += p_sys->ic->start_time;
 695
 696                 msg_Warn( p_demux, "DEMUX_SET_POSITION: %"PRId64, i64 );
 697
 698                 /* If we have a duration, we prefer to seek by time
 699                    but if we don't, or if the seek fails, try BYTE seeking */
 700                 if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
 701                     (av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
 702                 {
 703                     int64_t i_size = stream_Size( p_demux->s );
 704                     i64 = (i_size * f);
 705
 706                     msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: %"PRId64, i64 );
 707                     if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
 708                         return VLC_EGENERIC;
 709                 }
 710                 else
 711                 {
 712                     UpdateSeekPoint( p_demux, i64 );
 713                 }
 714                 p_sys->i_pcr = -1; /* Invalidate time display */
 715             }
 716             return VLC_SUCCESS;
 717
 718         case DEMUX_GET_LENGTH:
 719             pi64 = (int64_t*)va_arg( args, int64_t * );
 720             if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
 721                 *pi64 = p_sys->ic->duration * 1000000 / AV_TIME_BASE;
 722             else
 723                 *pi64 = 0;
 724             return VLC_SUCCESS;
 725
 726         case DEMUX_GET_TIME:
 727             pi64 = (int64_t*)va_arg( args, int64_t * );
 728             *pi64 = p_sys->i_pcr;
 729             return VLC_SUCCESS;
 730
 731         case DEMUX_SET_TIME:
 732             i64 = (int64_t)va_arg( args, int64_t );
 733             i64 = i64 *AV_TIME_BASE / 1000000;
 734             if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 735                 i64 += p_sys->ic->start_time;
 736
 737             msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
 738
 739             if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
 740             {
 741                 return VLC_EGENERIC;
 742             }
 743             p_sys->i_pcr = -1; /* Invalidate time display */
 744             UpdateSeekPoint( p_demux, i64 );
 745             return VLC_SUCCESS;
 746
 747         case DEMUX_HAS_UNSUPPORTED_META:
 748         {
 749             bool *pb_bool = (bool*)va_arg( args, bool* );
 750             *pb_bool = true;
 751             return VLC_SUCCESS;
 752         }
 753
 754
 755         case DEMUX_GET_META:
 756         {
 757             vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
 758
 759             if( p_sys->ic->title[0] )
 760                 vlc_meta_SetTitle( p_meta, p_sys->ic->title );
 761             if( p_sys->ic->author[0] )
 762                 vlc_meta_SetArtist( p_meta, p_sys->ic->author );
 763             if( p_sys->ic->copyright[0] )
 764                 vlc_meta_SetCopyright( p_meta, p_sys->ic->copyright );
 765             if( p_sys->ic->comment[0] )
 766                 vlc_meta_SetDescription( p_meta, p_sys->ic->comment );
 767             if( p_sys->ic->genre[0] )
 768                 vlc_meta_SetGenre( p_meta, p_sys->ic->genre );
 769             return VLC_SUCCESS;
 770         }
 771
 772         case DEMUX_GET_ATTACHMENTS:
 773         {
 774             input_attachment_t ***ppp_attach =
 775                 (input_attachment_t***)va_arg( args, input_attachment_t*** );
 776             int *pi_int = (int*)va_arg( args, int * );
 777             int i;
 778
 779             if( p_sys->i_attachments <= 0 )
 780                 return VLC_EGENERIC;
 781
 782             *pi_int = p_sys->i_attachments;;
 783             *ppp_attach = malloc( sizeof(input_attachment_t**) * p_sys->i_attachments );
 784             for( i = 0; i < p_sys->i_attachments; i++ )
 785                 (*ppp_attach)[i] = vlc_input_attachment_Duplicate( p_sys->attachments[i] );
 786             return VLC_SUCCESS;
 787         }
 788
 789         case DEMUX_GET_TITLE_INFO:
 790         {
 791             input_title_t ***ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
 792             int *pi_int    = (int*)va_arg( args, int* );
 793             int *pi_title_offset = (int*)va_arg( args, int* );
 794             int *pi_seekpoint_offset = (int*)va_arg( args, int* );
 795
 796             if( !p_sys->p_title )
 797                 return VLC_EGENERIC;
 798
 799             *pi_int = 1;
 800             *ppp_title = malloc( sizeof( input_title_t**) );
 801             (*ppp_title)[0] = vlc_input_title_Duplicate( p_sys->p_title );
 802             *pi_title_offset = 0;
 803             *pi_seekpoint_offset = 0;
 804             return VLC_SUCCESS;
 805         }
 806         case DEMUX_SET_TITLE:
 807         {
 808             const int i_title = (int)va_arg( args, int );
 809             if( !p_sys->p_title || i_title != 0 )
 810                 return VLC_EGENERIC;
 811             return VLC_SUCCESS;
 812         }
 813         case DEMUX_SET_SEEKPOINT:
 814         {
 815             const int i_seekpoint = (int)va_arg( args, int );
 816             if( !p_sys->p_title )
 817                 return VLC_EGENERIC;
 818
 819             i64 = p_sys->p_title->seekpoint[i_seekpoint]->i_time_offset *AV_TIME_BASE / 1000000;
 820             if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 821                 i64 += p_sys->ic->start_time;
 822
 823             msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
 824
 825             if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
 826             {
 827                 return VLC_EGENERIC;
 828             }
 829             p_sys->i_pcr = -1; /* Invalidate time display */
 830             UpdateSeekPoint( p_demux, i64 );
 831             return VLC_SUCCESS;
 832         }
 833
 834
 835         default:
 836             return VLC_EGENERIC;
 837     }
 838 }
 839
 840 /*****************************************************************************
 841  * I/O wrappers for libavformat
 842  *****************************************************************************/
 843 static int IORead( void *opaque, uint8_t *buf, int buf_size )
 844 {
 845     URLContext *p_url = opaque;
 846     demux_t *p_demux = p_url->priv_data;
 847     if( buf_size < 0 ) return -1;
 848     int i_ret = stream_Read( p_demux->s, buf, buf_size );
 849     return i_ret ? i_ret : -1;
 850 }
 851
 852 static int64_t IOSeek( void *opaque, int64_t offset, int whence )
 853 {
 854     URLContext *p_url = opaque;
 855     demux_t *p_demux = p_url->priv_data;
 856     int64_t i_absolute;
 857     int64_t i_size = stream_Size( p_demux->s );
 858
 859 #ifdef AVFORMAT_DEBUG
 860     msg_Warn( p_demux, "IOSeek offset: %"PRId64", whence: %i", offset, whence );
 861 #endif
 862
 863     switch( whence )
 864     {
 865 #ifdef AVSEEK_SIZE
 866         case AVSEEK_SIZE:
 867             return i_size;
 868 #endif
 869         case SEEK_SET:
 870             i_absolute = (int64_t)offset;
 871             break;
 872         case SEEK_CUR:
 873             i_absolute = stream_Tell( p_demux->s ) + (int64_t)offset;
 874             break;
 875         case SEEK_END:
 876             i_absolute = i_size + (int64_t)offset;
 877             break;
 878         default:
 879             return -1;
 880
 881     }
 882
 883     if( i_absolute < 0 )
 884     {
 885         msg_Dbg( p_demux, "Trying to seek before the beginning" );
 886         return -1;
 887     }
 888
 889     if( i_size > 0 && i_absolute >= i_size )
 890     {
 891         msg_Dbg( p_demux, "Trying to seek too far : EOF?" );
 892         return -1;
 893     }
 894
 895     if( stream_Seek( p_demux->s, i_absolute ) )
 896     {
 897         msg_Warn( p_demux, "we were not allowed to seek, or EOF " );
 898         return -1;
 899     }
 900
 901     return stream_Tell( p_demux->s );
 902 }
 903
 904 #endif /* HAVE_LIBAVFORMAT_AVFORMAT_H */