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