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

   1 /*****************************************************************************
   2  * demux.c: demuxer using 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 #include <libavformat/avformat.h>
  42
  43 #include "../../codec/avcodec/avcodec.h"
  44 #include "../../codec/avcodec/chroma.h"
  45 #include "avformat.h"
  46 #include "../xiph.h"
  47 #include "../vobsub.h"
  48
  49 //#define AVFORMAT_DEBUG 1
  50
  51 /* Version checking */
  52 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
  53
  54 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(50<<8)+0) )
  55 #   define HAVE_AVUTIL_CODEC_ATTACHMENT 1
  56 #endif
  57
  58 /*****************************************************************************
  59  * demux_sys_t: demux descriptor
  60  *****************************************************************************/
  61 struct demux_sys_t
  62 {
  63     ByteIOContext   io;
  64     int             io_buffer_size;
  65     uint8_t        *io_buffer;
  66
  67     AVInputFormat  *fmt;
  68     AVFormatContext *ic;
  69     URLContext     url;
  70     URLProtocol    prot;
  71
  72     int             i_tk;
  73     es_out_id_t     **tk;
  74
  75     int64_t     i_pcr;
  76     int         i_pcr_tk;
  77
  78     unsigned    i_ssa_order;
  79
  80     int                i_attachments;
  81     input_attachment_t **attachments;
  82
  83     /* Only one title with seekpoints possible atm. */
  84     input_title_t *p_title;
  85 };
  86
  87 /*****************************************************************************
  88  * Local prototypes
  89  *****************************************************************************/
  90 static int Demux  ( demux_t *p_demux );
  91 static int Control( demux_t *p_demux, int i_query, va_list args );
  92
  93 static int IORead( void *opaque, uint8_t *buf, int buf_size );
  94 static int64_t IOSeek( void *opaque, int64_t offset, int whence );
  95
  96 static block_t *BuildSsaFrame( const AVPacket *p_pkt, unsigned i_order );
  97 static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time );
  98
  99 /*****************************************************************************
 100  * Open
 101  *****************************************************************************/
 102 int OpenDemux( vlc_object_t *p_this )
 103 {
 104     demux_t       *p_demux = (demux_t*)p_this;
 105     demux_sys_t   *p_sys;
 106     AVProbeData   pd;
 107     AVInputFormat *fmt;
 108     unsigned int  i;
 109     int64_t       i_start_time = -1;
 110     bool          b_can_seek;
 111     char         *psz_url;
 112
 113     if( p_demux->psz_file )
 114         psz_url = strdup( p_demux->psz_file );
 115     else
 116     {
 117         if( asprintf( &psz_url, "%s://%s", p_demux->psz_access, p_demux->psz_location ) == -1)
 118             return VLC_ENOMEM;
 119     }
 120     msg_Dbg( p_demux, "trying url: %s", psz_url );
 121     /* Init Probe data */
 122     pd.filename = psz_url;
 123     if( ( pd.buf_size = stream_Peek( p_demux->s, &pd.buf, 2048 + 213 ) ) <= 0 )
 124     {
 125         free( psz_url );
 126         msg_Warn( p_demux, "cannot peek" );
 127         return VLC_EGENERIC;
 128     }
 129
 130     vlc_avcodec_lock();
 131     av_register_all(); /* Can be called several times */
 132     vlc_avcodec_unlock();
 133
 134     /* Guess format */
 135     if( !( fmt = av_probe_input_format( &pd, 1 ) ) )
 136     {
 137         msg_Dbg( p_demux, "couldn't guess format" );
 138         free( psz_url );
 139         return VLC_EGENERIC;
 140     }
 141
 142     /* Don't try to handle MPEG unless forced */
 143     if( !p_demux->b_force &&
 144         ( !strcmp( fmt->name, "mpeg" ) ||
 145           !strcmp( fmt->name, "vcd" ) ||
 146           !strcmp( fmt->name, "vob" ) ||
 147           !strcmp( fmt->name, "mpegts" ) ||
 148           /* libavformat's redirector won't work */
 149           !strcmp( fmt->name, "redir" ) ||
 150           !strcmp( fmt->name, "sdp" ) ) )
 151     {
 152         free( psz_url );
 153         return VLC_EGENERIC;
 154     }
 155
 156     /* Don't trigger false alarms on bin files */
 157     if( !p_demux->b_force && !strcmp( fmt->name, "psxstr" ) )
 158     {
 159         int i_len;
 160
 161         if( !p_demux->psz_file )
 162         {
 163             free( psz_url );
 164             return VLC_EGENERIC;
 165         }
 166
 167         i_len = strlen( p_demux->psz_file );
 168         if( i_len < 4 )
 169         {
 170             free( psz_url );
 171             return VLC_EGENERIC;
 172         }
 173
 174         if( strcasecmp( &p_demux->psz_file[i_len - 4], ".str" ) &&
 175             strcasecmp( &p_demux->psz_file[i_len - 4], ".xai" ) &&
 176             strcasecmp( &p_demux->psz_file[i_len - 3], ".xa" ) )
 177         {
 178             free( psz_url );
 179             return VLC_EGENERIC;
 180         }
 181     }
 182
 183     msg_Dbg( p_demux, "detected format: %s", fmt->name );
 184
 185     /* Fill p_demux fields */
 186     p_demux->pf_demux = Demux;
 187     p_demux->pf_control = Control;
 188     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 189     p_sys->ic = 0;
 190     p_sys->fmt = fmt;
 191     p_sys->i_tk = 0;
 192     p_sys->tk = NULL;
 193     p_sys->i_pcr_tk = -1;
 194     p_sys->i_pcr = -1;
 195     p_sys->i_ssa_order = 0;
 196     TAB_INIT( p_sys->i_attachments, p_sys->attachments);
 197     p_sys->p_title = NULL;
 198
 199     /* Create I/O wrapper */
 200     p_sys->io_buffer_size = 32768;  /* FIXME */
 201     p_sys->io_buffer = malloc( p_sys->io_buffer_size );
 202     p_sys->url.priv_data = p_demux;
 203     p_sys->url.prot = &p_sys->prot;
 204     p_sys->url.prot->name = "VLC I/O wrapper";
 205     p_sys->url.prot->url_open = 0;
 206     p_sys->url.prot->url_read =
 207                     (int (*) (URLContext *, unsigned char *, int))IORead;
 208     p_sys->url.prot->url_write = 0;
 209     p_sys->url.prot->url_seek =
 210                     (int64_t (*) (URLContext *, int64_t, int))IOSeek;
 211     p_sys->url.prot->url_close = 0;
 212     p_sys->url.prot->next = 0;
 213     init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
 214                    0, &p_sys->url, IORead, NULL, IOSeek );
 215
 216     stream_Control( p_demux->s, STREAM_CAN_SEEK, &b_can_seek );
 217     if( !b_can_seek )
 218     {
 219        /* Tell avformat that input is stream, so it doesn't get stuck
 220        when trying av_find_stream_info() trying to seek all the wrong places
 221        init_put_byte defaults io.is_streamed=0, so thats why we set them after it
 222        */
 223        p_sys->url.is_streamed = 1;
 224        p_sys->io.is_streamed = 1;
 225 #if defined(AVIO_SEEKABLE_NORMAL)
 226        p_sys->io.seekable = 0;
 227 #endif
 228     }
 229
 230
 231     /* Open it */
 232     if( av_open_input_stream( &p_sys->ic, &p_sys->io, psz_url,
 233                               p_sys->fmt, NULL ) )
 234     {
 235         msg_Err( p_demux, "av_open_input_stream failed" );
 236         p_sys->ic = NULL;
 237         free( psz_url );
 238         CloseDemux( p_this );
 239         return VLC_EGENERIC;
 240     }
 241     free( psz_url );
 242     psz_url = NULL;
 243
 244     vlc_avcodec_lock(); /* avformat calls avcodec behind our back!!! */
 245     if( av_find_stream_info( p_sys->ic ) < 0 )
 246     {
 247         msg_Warn( p_demux, "av_find_stream_info failed" );
 248     }
 249     vlc_avcodec_unlock();
 250
 251     for( i = 0; i < p_sys->ic->nb_streams; i++ )
 252     {
 253         AVStream *s = p_sys->ic->streams[i];
 254         AVCodecContext *cc = s->codec;
 255
 256         es_out_id_t  *es;
 257         es_format_t  fmt;
 258         vlc_fourcc_t fcc;
 259         const char *psz_type = "unknown";
 260
 261         if( !GetVlcFourcc( cc->codec_id, NULL, &fcc, NULL ) )
 262             fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
 263
 264         switch( cc->codec_type )
 265         {
 266         case AVMEDIA_TYPE_AUDIO:
 267             es_format_Init( &fmt, AUDIO_ES, fcc );
 268             fmt.i_bitrate = cc->bit_rate;
 269             fmt.audio.i_channels = cc->channels;
 270             fmt.audio.i_rate = cc->sample_rate;
 271             fmt.audio.i_bitspersample = cc->bits_per_coded_sample;
 272             fmt.audio.i_blockalign = cc->block_align;
 273             psz_type = "audio";
 274             break;
 275
 276         case AVMEDIA_TYPE_VIDEO:
 277             es_format_Init( &fmt, VIDEO_ES, fcc );
 278
 279             /* Special case for raw video data */
 280             if( cc->codec_id == CODEC_ID_RAWVIDEO )
 281             {
 282                 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
 283                 if( GetVlcChroma( &fmt.video, cc->pix_fmt ) != VLC_SUCCESS)
 284                 {
 285                     msg_Err( p_demux, "was unable to find a FourCC match for raw video" );
 286                 }
 287                 else
 288                     fmt.i_codec = fmt.video.i_chroma;
 289             }
 290             /* We need this for the h264 packetizer */
 291             else if( cc->codec_id == CODEC_ID_H264 && ( !strcmp( p_sys->fmt->name, "flv" ) ||
 292                 !strcmp( p_sys->fmt->name, "matroska" ) || !strcmp( p_sys->fmt->name, "mp4" ) ) )
 293                 fmt.i_original_fourcc = VLC_FOURCC( 'a', 'v', 'c', '1' );
 294
 295             fmt.video.i_width = cc->width;
 296             fmt.video.i_height = cc->height;
 297             if( cc->palctrl )
 298             {
 299                 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
 300                 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
 301             }
 302             psz_type = "video";
 303             fmt.video.i_frame_rate = cc->time_base.den;
 304             fmt.video.i_frame_rate_base = cc->time_base.num * __MAX( cc->ticks_per_frame, 1 );
 305             break;
 306
 307         case AVMEDIA_TYPE_SUBTITLE:
 308             es_format_Init( &fmt, SPU_ES, fcc );
 309             if( strncmp( p_sys->ic->iformat->name, "matroska", 8 ) == 0 &&
 310                 cc->codec_id == CODEC_ID_DVD_SUBTITLE &&
 311                 cc->extradata != NULL &&
 312                 cc->extradata_size > 0 )
 313             {
 314                 char *psz_start;
 315                 char *psz_buf = malloc( cc->extradata_size + 1);
 316                 if( psz_buf != NULL )
 317                 {
 318                     memcpy( psz_buf, cc->extradata , cc->extradata_size );
 319                     psz_buf[cc->extradata_size] = '\0';
 320
 321                     psz_start = strstr( psz_buf, "size:" );
 322                     if( psz_start &&
 323                         vobsub_size_parse( psz_start,
 324                                            &fmt.subs.spu.i_original_frame_width,
 325                                            &fmt.subs.spu.i_original_frame_height ) == VLC_SUCCESS )
 326                     {
 327                         msg_Dbg( p_demux, "original frame size: %dx%d",
 328                                  fmt.subs.spu.i_original_frame_width,
 329                                  fmt.subs.spu.i_original_frame_height );
 330                     }
 331                     else
 332                     {
 333                         msg_Warn( p_demux, "reading original frame size failed" );
 334                     }
 335
 336                     psz_start = strstr( psz_buf, "palette:" );
 337                     if( psz_start &&
 338                         vobsub_palette_parse( psz_start, &fmt.subs.spu.palette[1] ) == VLC_SUCCESS )
 339                     {
 340                         fmt.subs.spu.palette[0] =  0xBeef;
 341                         msg_Dbg( p_demux, "vobsub palette read" );
 342                     }
 343                     else
 344                     {
 345                         msg_Warn( p_demux, "reading original palette failed" );
 346                     }
 347                     free( psz_buf );
 348                 }
 349             }
 350
 351             psz_type = "subtitle";
 352             break;
 353
 354         default:
 355             es_format_Init( &fmt, UNKNOWN_ES, 0 );
 356 #ifdef HAVE_AVUTIL_CODEC_ATTACHMENT
 357             if( cc->codec_type == AVMEDIA_TYPE_ATTACHMENT )
 358             {
 359                 input_attachment_t *p_attachment;
 360
 361                 psz_type = "attachment";
 362                 if( cc->codec_id == CODEC_ID_TTF )
 363                 {
 364                     AVMetadataTag *filename = av_metadata_get( s->metadata, "filename", NULL, 0 );
 365                     if( filename && filename->value )
 366                     {
 367                         p_attachment = vlc_input_attachment_New(
 368                                 filename->value, "application/x-truetype-font",
 369                                 NULL, cc->extradata, (int)cc->extradata_size );
 370                         TAB_APPEND( p_sys->i_attachments, p_sys->attachments,
 371                                 p_attachment );
 372                     }
 373                 }
 374                 else msg_Warn( p_demux, "unsupported attachment type (%u) in avformat demux", cc->codec_id );
 375             }
 376             else
 377 #endif
 378             {
 379                 if( cc->codec_type == AVMEDIA_TYPE_DATA )
 380                     psz_type = "data";
 381
 382                 msg_Warn( p_demux, "unsupported track type (%u:%u) in avformat demux", cc->codec_type, cc->codec_id );
 383             }
 384             break;
 385         }
 386
 387         AVMetadataTag *language = av_metadata_get( s->metadata, "language", NULL, 0 );
 388         if ( language && language->value )
 389             fmt.psz_language = strdup( language->value );
 390
 391         if( s->disposition & AV_DISPOSITION_DEFAULT )
 392             fmt.i_priority = 1000;
 393
 394 #ifdef HAVE_AVUTIL_CODEC_ATTACHMENT
 395         if( cc->codec_type != AVMEDIA_TYPE_ATTACHMENT )
 396 #endif
 397         if( cc->codec_type != AVMEDIA_TYPE_DATA )
 398         {
 399             const bool    b_ogg = !strcmp( p_sys->fmt->name, "ogg" );
 400             const uint8_t *p_extra = cc->extradata;
 401             unsigned      i_extra  = cc->extradata_size;
 402
 403             if( cc->codec_id == CODEC_ID_THEORA && b_ogg )
 404             {
 405                 unsigned pi_size[3];
 406                 const void *pp_data[3];
 407                 unsigned i_count;
 408                 for( i_count = 0; i_count < 3; i_count++ )
 409                 {
 410                     if( i_extra < 2 )
 411                         break;
 412                     pi_size[i_count] = GetWBE( p_extra );
 413                     pp_data[i_count] = &p_extra[2];
 414                     if( i_extra < pi_size[i_count] + 2 )
 415                         break;
 416
 417                     p_extra += 2 + pi_size[i_count];
 418                     i_extra -= 2 + pi_size[i_count];
 419                 }
 420                 if( i_count > 0 && xiph_PackHeaders( &fmt.i_extra, &fmt.p_extra,
 421                                                      pi_size, pp_data, i_count ) )
 422                 {
 423                     fmt.i_extra = 0;
 424                     fmt.p_extra = NULL;
 425                 }
 426             }
 427             else if( cc->codec_id == CODEC_ID_SPEEX && b_ogg )
 428             {
 429                 const uint8_t p_dummy_comment[] = {
 430                     0, 0, 0, 0,
 431                     0, 0, 0, 0,
 432                 };
 433                 unsigned pi_size[2];
 434                 const void *pp_data[2];
 435
 436                 pi_size[0] = i_extra;
 437                 pp_data[0] = p_extra;
 438
 439                 pi_size[1] = sizeof(p_dummy_comment);
 440                 pp_data[1] = p_dummy_comment;
 441
 442                 if( pi_size[0] > 0 && xiph_PackHeaders( &fmt.i_extra, &fmt.p_extra,
 443                                                         pi_size, pp_data, 2 ) )
 444                 {
 445                     fmt.i_extra = 0;
 446                     fmt.p_extra = NULL;
 447                 }
 448             }
 449             else if( cc->extradata_size > 0 )
 450             {
 451                 fmt.p_extra = malloc( i_extra );
 452                 if( fmt.p_extra )
 453                 {
 454                     fmt.i_extra = i_extra;
 455                     memcpy( fmt.p_extra, p_extra, i_extra );
 456                 }
 457             }
 458             es = es_out_Add( p_demux->out, &fmt );
 459             if( s->disposition & AV_DISPOSITION_DEFAULT )
 460                 es_out_Control( p_demux->out, ES_OUT_SET_ES_DEFAULT, es );
 461             es_format_Clean( &fmt );
 462
 463             msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
 464                      psz_type, (char*)&fcc );
 465             TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
 466         }
 467     }
 468     if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 469         i_start_time = p_sys->ic->start_time * 1000000 / AV_TIME_BASE;
 470
 471     msg_Dbg( p_demux, "AVFormat supported stream" );
 472     msg_Dbg( p_demux, "    - format = %s (%s)",
 473              p_sys->fmt->name, p_sys->fmt->long_name );
 474     msg_Dbg( p_demux, "    - start time = %"PRId64, i_start_time );
 475     msg_Dbg( p_demux, "    - duration = %"PRId64,
 476              ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
 477              p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
 478
 479     if( p_sys->ic->nb_chapters > 0 )
 480         p_sys->p_title = vlc_input_title_New();
 481     for( i = 0; i < p_sys->ic->nb_chapters; i++ )
 482     {
 483         seekpoint_t *s = vlc_seekpoint_New();
 484
 485         AVMetadataTag *title = av_metadata_get( p_sys->ic->metadata, "title", NULL, 0);
 486         if( title && title->value )
 487         {
 488             s->psz_name = strdup( title->value );
 489             EnsureUTF8( s->psz_name );
 490             msg_Dbg( p_demux, "    - chapter %d: %s", i, s->psz_name );
 491         }
 492         s->i_time_offset = p_sys->ic->chapters[i]->start * 1000000 *
 493             p_sys->ic->chapters[i]->time_base.num /
 494             p_sys->ic->chapters[i]->time_base.den -
 495             (i_start_time != -1 ? i_start_time : 0 );
 496         TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s );
 497     }
 498
 499     return VLC_SUCCESS;
 500 }
 501
 502 /*****************************************************************************
 503  * Close
 504  *****************************************************************************/
 505 void CloseDemux( vlc_object_t *p_this )
 506 {
 507     demux_t     *p_demux = (demux_t*)p_this;
 508     demux_sys_t *p_sys = p_demux->p_sys;
 509
 510     FREENULL( p_sys->tk );
 511
 512     if( p_sys->ic ) av_close_input_stream( p_sys->ic );
 513
 514     for( int i = 0; i < p_sys->i_attachments; i++ )
 515         free( p_sys->attachments[i] );
 516     TAB_CLEAN( p_sys->i_attachments, p_sys->attachments);
 517
 518     if( p_sys->p_title )
 519         vlc_input_title_Delete( p_sys->p_title );
 520
 521     free( p_sys->io_buffer );
 522     free( p_sys );
 523 }
 524
 525 /*****************************************************************************
 526  * Demux:
 527  *****************************************************************************/
 528 static int Demux( demux_t *p_demux )
 529 {
 530     demux_sys_t *p_sys = p_demux->p_sys;
 531     AVPacket    pkt;
 532     block_t     *p_frame;
 533     int64_t     i_start_time;
 534
 535     /* Read a frame */
 536     if( av_read_frame( p_sys->ic, &pkt ) )
 537     {
 538         return 0;
 539     }
 540     if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
 541     {
 542         av_free_packet( &pkt );
 543         return 1;
 544     }
 545     const AVStream *p_stream = p_sys->ic->streams[pkt.stream_index];
 546     if( p_stream->time_base.den <= 0 )
 547     {
 548         msg_Warn( p_demux, "Invalid time base for the stream %d", pkt.stream_index );
 549         av_free_packet( &pkt );
 550         return 1;
 551     }
 552     if( p_stream->codec->codec_id == CODEC_ID_SSA )
 553     {
 554         p_frame = BuildSsaFrame( &pkt, p_sys->i_ssa_order++ );
 555         if( !p_frame )
 556         {
 557             av_free_packet( &pkt );
 558             return 1;
 559         }
 560     }
 561     else
 562     {
 563         if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
 564         {
 565             av_free_packet( &pkt );
 566             return 0;
 567         }
 568         memcpy( p_frame->p_buffer, pkt.data, pkt.size );
 569     }
 570
 571     if( pkt.flags & AV_PKT_FLAG_KEY )
 572         p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
 573
 574     i_start_time = ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
 575         ( p_sys->ic->start_time * 1000000 / AV_TIME_BASE )  : 0;
 576
 577     p_frame->i_dts = ( pkt.dts == (int64_t)AV_NOPTS_VALUE ) ?
 578         VLC_TS_INVALID : (pkt.dts) * 1000000 *
 579         p_stream->time_base.num /
 580         p_stream->time_base.den - i_start_time + VLC_TS_0;
 581     p_frame->i_pts = ( pkt.pts == (int64_t)AV_NOPTS_VALUE ) ?
 582         VLC_TS_INVALID : (pkt.pts) * 1000000 *
 583         p_stream->time_base.num /
 584         p_stream->time_base.den - i_start_time + VLC_TS_0;
 585     if( pkt.duration > 0 && p_frame->i_length <= 0 )
 586         p_frame->i_length = pkt.duration * 1000000 *
 587             p_stream->time_base.num /
 588             p_stream->time_base.den;
 589
 590     if( pkt.dts != AV_NOPTS_VALUE && pkt.dts == pkt.pts &&
 591         p_stream->codec->codec_type == AVMEDIA_TYPE_VIDEO )
 592     {
 593         /* Add here notoriously bugged file formats/samples regarding PTS */
 594         if( !strcmp( p_sys->fmt->name, "flv" ) )
 595             p_frame->i_pts = VLC_TS_INVALID;
 596     }
 597 #ifdef AVFORMAT_DEBUG
 598     msg_Dbg( p_demux, "tk[%d] dts=%"PRId64" pts=%"PRId64,
 599              pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
 600 #endif
 601
 602     if( p_frame->i_dts > VLC_TS_INVALID  &&
 603         ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
 604     {
 605         p_sys->i_pcr_tk = pkt.stream_index;
 606         p_sys->i_pcr = p_frame->i_dts;
 607
 608         es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
 609     }
 610
 611     es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
 612
 613     UpdateSeekPoint( p_demux, p_sys->i_pcr);
 614     av_free_packet( &pkt );
 615     return 1;
 616 }
 617
 618 static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time )
 619 {
 620     demux_sys_t *p_sys = p_demux->p_sys;
 621     int i;
 622
 623     if( !p_sys->p_title )
 624         return;
 625
 626     for( i = 0; i < p_sys->p_title->i_seekpoint; i++ )
 627     {
 628         if( i_time < p_sys->p_title->seekpoint[i]->i_time_offset )
 629             break;
 630     }
 631     i--;
 632
 633     if( i != p_demux->info.i_seekpoint && i >= 0 )
 634     {
 635         p_demux->info.i_seekpoint = i;
 636         p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 637     }
 638 }
 639
 640 static block_t *BuildSsaFrame( const AVPacket *p_pkt, unsigned i_order )
 641 {
 642     if( p_pkt->size <= 0 )
 643         return NULL;
 644
 645     char buffer[256];
 646     const size_t i_buffer_size = __MIN( (int)sizeof(buffer) - 1, p_pkt->size );
 647     memcpy( buffer, p_pkt->data, i_buffer_size );
 648     buffer[i_buffer_size] = '\0';
 649
 650     /* */
 651     int i_layer;
 652     int h0, m0, s0, c0;
 653     int h1, m1, s1, c1;
 654     int i_position = 0;
 655     if( sscanf( buffer, "Dialogue: %d,%d:%d:%d.%d,%d:%d:%d.%d,%n", &i_layer,
 656                 &h0, &m0, &s0, &c0, &h1, &m1, &s1, &c1, &i_position ) < 9 )
 657         return NULL;
 658     if( i_position <= 0 || (unsigned)i_position >= i_buffer_size )
 659         return NULL;
 660
 661     char *p;
 662     if( asprintf( &p, "%u,%d,%.*s", i_order, i_layer, p_pkt->size - i_position, p_pkt->data + i_position ) < 0 )
 663         return NULL;
 664
 665     block_t *p_frame = block_heap_Alloc( p, p, strlen(p) + 1 );
 666     if( p_frame )
 667         p_frame->i_length = CLOCK_FREQ * ((h1-h0) * 3600 +
 668                                           (m1-m0) * 60 +
 669                                           (s1-s0) * 1) +
 670                             CLOCK_FREQ * (c1-c0) / 100;
 671     return p_frame;
 672 }
 673
 674 /*****************************************************************************
 675  * Control:
 676  *****************************************************************************/
 677 static int Control( demux_t *p_demux, int i_query, va_list args )
 678 {
 679     demux_sys_t *p_sys = p_demux->p_sys;
 680     double f, *pf;
 681     int64_t i64, *pi64;
 682
 683     switch( i_query )
 684     {
 685         case DEMUX_GET_POSITION:
 686             pf = (double*) va_arg( args, double* ); *pf = 0.0;
 687             i64 = stream_Size( p_demux->s );
 688             if( i64 > 0 )
 689             {
 690                 double current = stream_Tell( p_demux->s );
 691                 *pf = current / (double)i64;
 692             }
 693
 694             if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
 695             {
 696                 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
 697             }
 698
 699             return VLC_SUCCESS;
 700
 701         case DEMUX_SET_POSITION:
 702             f = (double) va_arg( args, double );
 703             if( p_sys->i_pcr > 0 )
 704             {
 705                 i64 = p_sys->ic->duration * f;
 706                 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 707                     i64 += p_sys->ic->start_time;
 708
 709                 msg_Warn( p_demux, "DEMUX_SET_POSITION: %"PRId64, i64 );
 710
 711                 /* If we have a duration, we prefer to seek by time
 712                    but if we don't, or if the seek fails, try BYTE seeking */
 713                 if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
 714                     (av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
 715                 {
 716                     int64_t i_size = stream_Size( p_demux->s );
 717                     i64 = (i_size * f);
 718
 719                     msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: %"PRId64, i64 );
 720                     if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
 721                         return VLC_EGENERIC;
 722                 }
 723                 else
 724                 {
 725                     UpdateSeekPoint( p_demux, i64 );
 726                 }
 727                 p_sys->i_pcr = -1; /* Invalidate time display */
 728             }
 729             return VLC_SUCCESS;
 730
 731         case DEMUX_GET_LENGTH:
 732             pi64 = (int64_t*)va_arg( args, int64_t * );
 733             if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
 734                 *pi64 = p_sys->ic->duration * 1000000 / AV_TIME_BASE;
 735             else
 736                 *pi64 = 0;
 737             return VLC_SUCCESS;
 738
 739         case DEMUX_GET_TIME:
 740             pi64 = (int64_t*)va_arg( args, int64_t * );
 741             *pi64 = p_sys->i_pcr;
 742             return VLC_SUCCESS;
 743
 744         case DEMUX_SET_TIME:
 745             i64 = (int64_t)va_arg( args, int64_t );
 746             i64 = i64 *AV_TIME_BASE / 1000000;
 747             if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 748                 i64 += p_sys->ic->start_time;
 749
 750             msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
 751
 752             if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
 753             {
 754                 return VLC_EGENERIC;
 755             }
 756             p_sys->i_pcr = -1; /* Invalidate time display */
 757             UpdateSeekPoint( p_demux, i64 );
 758             return VLC_SUCCESS;
 759
 760         case DEMUX_HAS_UNSUPPORTED_META:
 761         {
 762             bool *pb_bool = (bool*)va_arg( args, bool* );
 763             *pb_bool = true;
 764             return VLC_SUCCESS;
 765         }
 766
 767
 768         case DEMUX_GET_META:
 769         {
 770             vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
 771
 772             AVMetadataTag *title = av_metadata_get( p_sys->ic->metadata, "language", NULL, 0 );
 773             AVMetadataTag *artist = av_metadata_get( p_sys->ic->metadata, "artist", NULL, 0 );
 774             AVMetadataTag *copyright = av_metadata_get( p_sys->ic->metadata, "copyright", NULL, 0 );
 775             AVMetadataTag *comment = av_metadata_get( p_sys->ic->metadata, "comment", NULL, 0 );
 776             AVMetadataTag *genre = av_metadata_get( p_sys->ic->metadata, "genre", NULL, 0 );
 777
 778             if( title && title->value )
 779                 vlc_meta_SetTitle( p_meta, title->value );
 780             if( artist && artist->value )
 781                 vlc_meta_SetArtist( p_meta, artist->value );
 782             if( copyright && copyright->value )
 783                 vlc_meta_SetCopyright( p_meta, copyright->value );
 784             if( comment && comment->value )
 785                 vlc_meta_SetDescription( p_meta, comment->value );
 786             if( genre && genre->value )
 787                 vlc_meta_SetGenre( p_meta, genre->value );
 788             return VLC_SUCCESS;
 789         }
 790
 791         case DEMUX_GET_ATTACHMENTS:
 792         {
 793             input_attachment_t ***ppp_attach =
 794                 (input_attachment_t***)va_arg( args, input_attachment_t*** );
 795             int *pi_int = (int*)va_arg( args, int * );
 796             int i;
 797
 798             if( p_sys->i_attachments <= 0 )
 799                 return VLC_EGENERIC;
 800
 801             *pi_int = p_sys->i_attachments;;
 802             *ppp_attach = malloc( sizeof(input_attachment_t**) * p_sys->i_attachments );
 803             for( i = 0; i < p_sys->i_attachments; i++ )
 804                 (*ppp_attach)[i] = vlc_input_attachment_Duplicate( p_sys->attachments[i] );
 805             return VLC_SUCCESS;
 806         }
 807
 808         case DEMUX_GET_TITLE_INFO:
 809         {
 810             input_title_t ***ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
 811             int *pi_int    = (int*)va_arg( args, int* );
 812             int *pi_title_offset = (int*)va_arg( args, int* );
 813             int *pi_seekpoint_offset = (int*)va_arg( args, int* );
 814
 815             if( !p_sys->p_title )
 816                 return VLC_EGENERIC;
 817
 818             *pi_int = 1;
 819             *ppp_title = malloc( sizeof( input_title_t**) );
 820             (*ppp_title)[0] = vlc_input_title_Duplicate( p_sys->p_title );
 821             *pi_title_offset = 0;
 822             *pi_seekpoint_offset = 0;
 823             return VLC_SUCCESS;
 824         }
 825         case DEMUX_SET_TITLE:
 826         {
 827             const int i_title = (int)va_arg( args, int );
 828             if( !p_sys->p_title || i_title != 0 )
 829                 return VLC_EGENERIC;
 830             return VLC_SUCCESS;
 831         }
 832         case DEMUX_SET_SEEKPOINT:
 833         {
 834             const int i_seekpoint = (int)va_arg( args, int );
 835             if( !p_sys->p_title )
 836                 return VLC_EGENERIC;
 837
 838             i64 = p_sys->p_title->seekpoint[i_seekpoint]->i_time_offset *AV_TIME_BASE / 1000000;
 839             if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 840                 i64 += p_sys->ic->start_time;
 841
 842             msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
 843
 844             if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
 845             {
 846                 return VLC_EGENERIC;
 847             }
 848             p_sys->i_pcr = -1; /* Invalidate time display */
 849             UpdateSeekPoint( p_demux, i64 );
 850             return VLC_SUCCESS;
 851         }
 852
 853
 854         default:
 855             return VLC_EGENERIC;
 856     }
 857 }
 858
 859 /*****************************************************************************
 860  * I/O wrappers for libavformat
 861  *****************************************************************************/
 862 static int IORead( void *opaque, uint8_t *buf, int buf_size )
 863 {
 864     URLContext *p_url = opaque;
 865     demux_t *p_demux = p_url->priv_data;
 866     if( buf_size < 0 ) return -1;
 867     int i_ret = stream_Read( p_demux->s, buf, buf_size );
 868     return i_ret ? i_ret : -1;
 869 }
 870
 871 static int64_t IOSeek( void *opaque, int64_t offset, int whence )
 872 {
 873     URLContext *p_url = opaque;
 874     demux_t *p_demux = p_url->priv_data;
 875     int64_t i_absolute;
 876     int64_t i_size = stream_Size( p_demux->s );
 877
 878 #ifdef AVFORMAT_DEBUG
 879     msg_Warn( p_demux, "IOSeek offset: %"PRId64", whence: %i", offset, whence );
 880 #endif
 881
 882     switch( whence )
 883     {
 884 #ifdef AVSEEK_SIZE
 885         case AVSEEK_SIZE:
 886             return i_size;
 887 #endif
 888         case SEEK_SET:
 889             i_absolute = (int64_t)offset;
 890             break;
 891         case SEEK_CUR:
 892             i_absolute = stream_Tell( p_demux->s ) + (int64_t)offset;
 893             break;
 894         case SEEK_END:
 895             i_absolute = i_size + (int64_t)offset;
 896             break;
 897         default:
 898             return -1;
 899
 900     }
 901
 902     if( i_absolute < 0 )
 903     {
 904         msg_Dbg( p_demux, "Trying to seek before the beginning" );
 905         return -1;
 906     }
 907
 908     if( i_size > 0 && i_absolute >= i_size )
 909     {
 910         msg_Dbg( p_demux, "Trying to seek too far : EOF?" );
 911         return -1;
 912     }
 913
 914     if( stream_Seek( p_demux->s, i_absolute ) )
 915     {
 916         msg_Warn( p_demux, "we were not allowed to seek, or EOF " );
 917         return -1;
 918     }
 919
 920     return stream_Tell( p_demux->s );
 921 }
 922
 923 #endif /* HAVE_LIBAVFORMAT_AVFORMAT_H */