/***************************************************************************** * mp4.c : MP4 file input module for vlc ***************************************************************************** * Copyright (C) 2001 VideoLAN * $Id: mp4.c,v 1.49 2004/01/06 01:41:10 jlj Exp $ * Authors: Laurent Aimar * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ #include /* malloc(), free() */ #include #include #include #include "libmp4.h" #include "mp4.h" #include "drms.h" /***************************************************************************** * Module descriptor *****************************************************************************/ static int Open ( vlc_object_t * ); static void Close( vlc_object_t * ); vlc_module_begin(); set_description( _("MP4 demuxer") ); set_capability( "demux", 242 ); set_callbacks( Open, Close ); vlc_module_end(); /***************************************************************************** * Local prototypes *****************************************************************************/ static int Demux ( input_thread_t * ); static int DemuxRef( input_thread_t *p_input ) { return 0; } static int Seek ( input_thread_t *, mtime_t ); static int Control ( input_thread_t *, int, va_list ); /***************************************************************************** * Declaration of local function *****************************************************************************/ static void MP4_TrackCreate ( input_thread_t *, track_data_mp4_t *, MP4_Box_t *); static void MP4_TrackDestroy( input_thread_t *, track_data_mp4_t * ); static int MP4_TrackSelect ( input_thread_t *, track_data_mp4_t *, mtime_t ); static void MP4_TrackUnselect(input_thread_t *, track_data_mp4_t * ); static int MP4_TrackSeek ( input_thread_t *, track_data_mp4_t *, mtime_t ); static uint64_t MP4_GetTrackPos ( track_data_mp4_t * ); static int MP4_TrackSampleSize( track_data_mp4_t * ); static int MP4_TrackNextSample( input_thread_t *, track_data_mp4_t * ); #define FREE( p ) \ if( p ) { free( p ); (p) = NULL;} /***************************************************************************** * Open: check file and initializes MP4 structures *****************************************************************************/ static int Open( vlc_object_t * p_this ) { input_thread_t *p_input = (input_thread_t *)p_this; demux_sys_t *p_sys; uint8_t *p_peek; MP4_Box_t *p_ftyp; MP4_Box_t *p_rmra; MP4_Box_t *p_mvhd; MP4_Box_t *p_trak; unsigned int i; vlc_bool_t b_seekable; /* a little test to see if it could be a mp4 */ if( stream_Peek( p_input->s, &p_peek, 8 ) < 8 ) { msg_Warn( p_input, "MP4 plugin discarded (cannot peek)" ); return VLC_EGENERIC; } switch( VLC_FOURCC( p_peek[4], p_peek[5], p_peek[6], p_peek[7] ) ) { case FOURCC_ftyp: case FOURCC_moov: case FOURCC_foov: case FOURCC_moof: case FOURCC_mdat: case FOURCC_udta: case FOURCC_free: case FOURCC_skip: case FOURCC_wide: break; default: msg_Warn( p_input, "MP4 plugin discarded (not a valid file)" ); return VLC_EGENERIC; } /* I need to seek */ stream_Control( p_input->s, STREAM_CAN_SEEK, &b_seekable ); if( !b_seekable ) { msg_Warn( p_input, "MP4 plugin discarded (unseekable)" ); return VLC_EGENERIC; } /*Set exported functions */ p_input->pf_demux = Demux; p_input->pf_demux_control = Control; /* create our structure that will contains all data */ p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) ); memset( p_sys, 0, sizeof( demux_sys_t ) ); /* Now load all boxes ( except raw data ) */ if( ( p_sys->p_root = MP4_BoxGetRoot( p_input ) ) == NULL ) { msg_Warn( p_input, "MP4 plugin discarded (not a valid file)" ); goto error; } MP4_BoxDumpStructure( p_input, p_sys->p_root ); if( ( p_ftyp = MP4_BoxGet( p_sys->p_root, "/ftyp" ) ) ) { switch( p_ftyp->data.p_ftyp->i_major_brand ) { case( FOURCC_isom ): msg_Dbg( p_input, "ISO Media file (isom) version %d.", p_ftyp->data.p_ftyp->i_minor_version ); break; default: msg_Dbg( p_input, "unrecognized major file specification (%4.4s).", (char*)&p_ftyp->data.p_ftyp->i_major_brand ); break; } } else { msg_Dbg( p_input, "file type box missing (assuming ISO Media file)" ); } /* the file need to have one moov box */ if( MP4_BoxCount( p_sys->p_root, "/moov" ) <= 0 ) { MP4_Box_t *p_foov = MP4_BoxGet( p_sys->p_root, "/foov" ); if( !p_foov ) { msg_Err( p_input, "MP4 plugin discarded (no moov box)" ); goto error; } /* we have a free box as a moov, rename it */ p_foov->i_type = FOURCC_moov; } if( ( p_rmra = MP4_BoxGet( p_sys->p_root, "/moov/rmra" ) ) ) { playlist_t *p_playlist; int i_count = MP4_BoxCount( p_rmra, "rmda" ); int i; msg_Dbg( p_input, "detected playlist mov file (%d ref)", i_count ); p_playlist = (playlist_t *)vlc_object_find( p_input, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE ); if( p_playlist ) { //p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE; for( i = 0; i < i_count; i++ ) { MP4_Box_t *p_rdrf = MP4_BoxGet( p_rmra, "rmda[%d]/rdrf", i ); char *psz_ref; uint32_t i_ref_type; if( !p_rdrf || !( psz_ref = p_rdrf->data.p_rdrf->psz_ref ) ) { continue; } i_ref_type = p_rdrf->data.p_rdrf->i_ref_type; msg_Dbg( p_input, "new ref=`%s' type=%4.4s", psz_ref, (char*)&i_ref_type ); if( i_ref_type == VLC_FOURCC( 'u', 'r', 'l', ' ' ) ) { if( strstr( psz_ref, "qt5gateQT" ) ) { msg_Dbg( p_input, "ignoring pseudo ref =`%s'", psz_ref ); continue; } if( !strncmp( psz_ref, "http://", 7 ) || !strncmp( psz_ref, "rtsp://", 7 ) ) { msg_Dbg( p_input, "adding ref = `%s'", psz_ref ); playlist_Add( p_playlist, psz_ref, psz_ref, PLAYLIST_APPEND, PLAYLIST_END ); } else { /* msg dbg relative ? */ char *psz_absolute = alloca( strlen( p_input->psz_source ) + strlen( psz_ref ) + 1); char *end = strrchr( p_input->psz_source, '/' ); if( end ) { int i_len = end + 1 - p_input->psz_source; strncpy( psz_absolute, p_input->psz_source, i_len); psz_absolute[i_len] = '\0'; } else { strcpy( psz_absolute, "" ); } strcat( psz_absolute, psz_ref ); msg_Dbg( p_input, "adding ref = `%s'", psz_absolute ); playlist_Add( p_playlist, psz_absolute, psz_absolute, PLAYLIST_APPEND, PLAYLIST_END ); } } else { msg_Err( p_input, "unknown ref type=%4.4s FIXME (send a bug report)", (char*)&p_rdrf->data.p_rdrf->i_ref_type ); } } vlc_object_release( p_playlist ); } else { msg_Err( p_input, "can't find playlist" ); } } if( !(p_mvhd = MP4_BoxGet( p_sys->p_root, "/moov/mvhd" ) ) ) { if( !p_rmra ) { msg_Err( p_input, "cannot find /moov/mvhd" ); goto error; } else { msg_Warn( p_input, "cannot find /moov/mvhd (pure ref file)" ); p_input->pf_demux = DemuxRef; return VLC_SUCCESS; } } else { p_sys->i_timescale = p_mvhd->data.p_mvhd->i_timescale; p_sys->i_duration = p_mvhd->data.p_mvhd->i_duration; } if( !( p_sys->i_tracks = MP4_BoxCount( p_sys->p_root, "/moov/trak" ) ) ) { msg_Err( p_input, "cannot find any /moov/trak" ); goto error; } msg_Dbg( p_input, "find %d track%c", p_sys->i_tracks, p_sys->i_tracks ? 's':' ' ); /* create one program */ vlc_mutex_lock( &p_input->stream.stream_lock ); if( input_InitStream( p_input, 0 ) == -1) { vlc_mutex_unlock( &p_input->stream.stream_lock ); msg_Err( p_input, "cannot init stream" ); goto error; } if( p_sys->i_duration/p_sys->i_timescale > 0 ) { p_input->stream.i_mux_rate = p_input->stream.p_selected_area->i_size / 50 / ( p_sys->i_duration / p_sys->i_timescale ); } else { p_input->stream.i_mux_rate = 0; } vlc_mutex_unlock( &p_input->stream.stream_lock ); /* allocate memory */ p_sys->track = calloc( p_sys->i_tracks, sizeof( track_data_mp4_t ) ); memset( p_sys->track, 0, p_sys->i_tracks * sizeof( track_data_mp4_t ) ); /* now process each track and extract all usefull informations */ for( i = 0; i < p_sys->i_tracks; i++ ) { p_trak = MP4_BoxGet( p_sys->p_root, "/moov/trak[%d]", i ); MP4_TrackCreate( p_input, &p_sys->track[i], p_trak ); if( p_sys->track[i].b_ok ) { char *psz_cat; switch( p_sys->track[i].fmt.i_cat ) { case( VIDEO_ES ): psz_cat = "video"; break; case( AUDIO_ES ): psz_cat = "audio"; break; default: psz_cat = "unknown"; break; } msg_Dbg( p_input, "adding track[Id 0x%x] %s (%s) language %s", p_sys->track[i].i_track_ID, psz_cat, p_sys->track[i].b_enable ? "enable":"disable", p_sys->track[i].fmt.psz_language ? p_sys->track[i].fmt.psz_language : "undef" ); } else { msg_Dbg( p_input, "ignoring track[Id 0x%x]", p_sys->track[i].i_track_ID ); } } return VLC_SUCCESS; error: if( p_sys->p_root ) { MP4_BoxFree( p_input, p_sys->p_root ); } free( p_sys ); return VLC_EGENERIC; } /***************************************************************************** * Demux: read packet and send them to decoders ***************************************************************************** * TODO check for newly selected track (ie audio upt to now ) *****************************************************************************/ static int Demux( input_thread_t *p_input ) { demux_sys_t *p_sys = p_input->p_demux_data; unsigned int i_track; unsigned int i_track_selected; vlc_bool_t b_play_audio; /* check for newly selected/unselected track */ for( i_track = 0, i_track_selected = 0; i_track < p_sys->i_tracks; i_track++ ) { #define track p_sys->track[i_track] if( track.b_selected && track.i_sample >= track.i_sample_count ) { msg_Warn( p_input, "track[0x%x] will be disabled", track.i_track_ID ); MP4_TrackUnselect( p_input, &track ); } else if( track.b_ok ) { vlc_bool_t b; es_out_Control( p_input->p_es_out, ES_OUT_GET_ES_STATE, track.p_es, &b ); if( track.b_selected && !b ) { MP4_TrackUnselect( p_input, &track ); } else if( !track.b_selected && b) { MP4_TrackSelect( p_input, &track, MP4_GetMoviePTS( p_sys ) ); } if( track.b_selected ) { i_track_selected++; } } #undef track } if( i_track_selected <= 0 ) { msg_Warn( p_input, "no track selected, exiting..." ); return( 0 ); } /* first wait for the good time to read a packet */ input_ClockManageRef( p_input, p_input->stream.p_selected_program, p_sys->i_pcr ); /* update pcr XXX in mpeg scale so in 90000 unit/s */ p_sys->i_pcr = MP4_GetMoviePTS( p_sys ) * 9 / 100; /* we will read 100ms for each stream so ...*/ p_sys->i_time += __MAX( p_sys->i_timescale / 10 , 1 ); /* Check if we need to send the audio data to decoder */ b_play_audio = !p_input->stream.control.b_mute; for( i_track = 0; i_track < p_sys->i_tracks; i_track++ ) { #define track p_sys->track[i_track] if( !track.b_ok || !track.b_selected || MP4_GetTrackPTS( &track ) >= MP4_GetMoviePTS( p_sys ) ) { continue; } while( MP4_GetTrackPTS( &track ) < MP4_GetMoviePTS( p_sys ) ) { if( !b_play_audio && track.fmt.i_cat == AUDIO_ES ) { if( MP4_TrackNextSample( p_input, &track ) ) { break; } } else { block_t *p_block; /* go,go go ! */ if( stream_Seek( p_input->s, MP4_GetTrackPos( &track ) ) ) { msg_Warn( p_input, "track[0x%x] will be disabled (eof?)", track.i_track_ID ); MP4_TrackUnselect( p_input, &track ); break; } /* now read pes */ if( ( p_block = stream_Block( p_input->s, MP4_TrackSampleSize( &track ) ) ) == NULL ) { msg_Warn( p_input, "track[0x%x] will be disabled (eof?)", track.i_track_ID ); MP4_TrackUnselect( p_input, &track ); break; } if( track.p_drms != NULL ) { drms_decrypt( track.p_drms, (uint32_t *)p_block->p_buffer, p_block->i_buffer ); } if( track.fmt.i_cat == VIDEO_ES ) { /* FIXME sometime we can calculate PTS */ p_block->i_pts = 0; p_block->i_dts = input_ClockGetTS( p_input, p_input->stream.p_selected_program, MP4_GetTrackPTS( &track ) * 9/100 ); } else { p_block->i_pts = p_block->i_dts = input_ClockGetTS( p_input, p_input->stream.p_selected_program, MP4_GetTrackPTS( &track ) * 9/100 ); } es_out_Send( p_input->p_es_out, track.p_es, p_block ); if( MP4_TrackNextSample( p_input, &track ) ) { break; } } } #undef track } return( 1 ); } /***************************************************************************** * Seek: Got to i_date ******************************************************************************/ static int Seek ( input_thread_t *p_input, mtime_t i_date ) { demux_sys_t *p_sys = p_input->p_demux_data; unsigned int i_track; /* First update update global time */ p_sys->i_time = i_date * p_sys->i_timescale / 1000000; p_sys->i_pcr = i_date* 9 / 100; /* Now for each stream try to go to this time */ for( i_track = 0; i_track < p_sys->i_tracks; i_track++ ) { #define track p_sys->track[i_track] if( track.b_ok && track.b_selected ) { MP4_TrackSeek( p_input, &track, i_date ); } #undef track } return( 1 ); } /***************************************************************************** * Control: *****************************************************************************/ static int Control ( input_thread_t *p_input, int i_query, va_list args ) { demux_sys_t *p_sys = p_input->p_demux_data; double f, *pf; int64_t i64, *pi64; switch( i_query ) { case DEMUX_GET_POSITION: pf = (double*)va_arg( args, double * ); if( p_sys->i_duration > 0 ) { *pf = (double)p_sys->i_time / (double)p_sys->i_duration; } else { *pf = 0.0; } return VLC_SUCCESS; case DEMUX_SET_POSITION: f = (double)va_arg( args, double ); i64 = (int64_t)( f * (double)1000000 * (double)p_sys->i_duration / (double)p_sys->i_timescale ); return Seek( p_input, i64 ); case DEMUX_GET_TIME: pi64 = (int64_t*)va_arg( args, int64_t * ); *pi64 = (mtime_t)1000000 * (mtime_t)p_sys->i_time / (mtime_t)p_sys->i_timescale; return VLC_SUCCESS; case DEMUX_SET_TIME: i64 = (int64_t)va_arg( args, int64_t ); return Seek( p_input, i64 ); case DEMUX_GET_LENGTH: pi64 = (int64_t*)va_arg( args, int64_t * ); *pi64 = (mtime_t)1000000 * (mtime_t)p_sys->i_duration / (mtime_t)p_sys->i_timescale; return VLC_SUCCESS; case DEMUX_GET_FPS: msg_Warn( p_input, "DEMUX_GET_FPS unimplemented !!" ); return VLC_EGENERIC; default: msg_Err( p_input, "control query unimplemented !!!" ); return demux_vaControlDefault( p_input, i_query, args ); } } /***************************************************************************** * Close: frees unused data *****************************************************************************/ static void Close ( vlc_object_t * p_this ) { unsigned int i_track; input_thread_t * p_input = (input_thread_t *)p_this; demux_sys_t *p_sys = p_input->p_demux_data; msg_Dbg( p_input, "freeing all memory" ); MP4_BoxFree( p_input, p_sys->p_root ); for( i_track = 0; i_track < p_sys->i_tracks; i_track++ ) { MP4_TrackDestroy( p_input, &p_sys->track[i_track] ); } FREE( p_sys->track ); free( p_sys ); } /**************************************************************************** * Local functions, specific to vlc ****************************************************************************/ /* now create basic chunk data, the rest will be filled by MP4_CreateSamplesIndex */ static int TrackCreateChunksIndex( input_thread_t *p_input, track_data_mp4_t *p_demux_track ) { MP4_Box_t *p_co64; /* give offset for each chunk, same for stco and co64 */ MP4_Box_t *p_stsc; unsigned int i_chunk; unsigned int i_index, i_last; if( ( !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "stco" ) )&& !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "co64" ) ) )|| ( !(p_stsc = MP4_BoxGet( p_demux_track->p_stbl, "stsc" ) ) )) { return( VLC_EGENERIC ); } p_demux_track->i_chunk_count = p_co64->data.p_co64->i_entry_count; if( !p_demux_track->i_chunk_count ) { msg_Warn( p_input, "no chunk defined" ); return( VLC_EGENERIC ); } p_demux_track->chunk = calloc( p_demux_track->i_chunk_count, sizeof( chunk_data_mp4_t ) ); /* first we read chunk offset */ for( i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ ) { p_demux_track->chunk[i_chunk].i_offset = p_co64->data.p_co64->i_chunk_offset[i_chunk]; } /* now we read index for SampleEntry( soun vide mp4a mp4v ...) to be used for the sample XXX begin to 1 We construct it begining at the end */ i_last = p_demux_track->i_chunk_count; /* last chunk proceded */ i_index = p_stsc->data.p_stsc->i_entry_count; if( !i_index ) { msg_Warn( p_input, "cannot read chunk table or table empty" ); return( VLC_EGENERIC ); } while( i_index ) { i_index--; for( i_chunk = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1; i_chunk < i_last; i_chunk++ ) { p_demux_track->chunk[i_chunk].i_sample_description_index = p_stsc->data.p_stsc->i_sample_description_index[i_index]; p_demux_track->chunk[i_chunk].i_sample_count = p_stsc->data.p_stsc->i_samples_per_chunk[i_index]; } i_last = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1; } p_demux_track->chunk[0].i_sample_first = 0; for( i_chunk = 1; i_chunk < p_demux_track->i_chunk_count; i_chunk++ ) { p_demux_track->chunk[i_chunk].i_sample_first = p_demux_track->chunk[i_chunk-1].i_sample_first + p_demux_track->chunk[i_chunk-1].i_sample_count; } msg_Dbg( p_input, "track[Id 0x%x] read %d chunk", p_demux_track->i_track_ID, p_demux_track->i_chunk_count ); return( VLC_SUCCESS ); } static int TrackCreateSamplesIndex( input_thread_t *p_input, track_data_mp4_t *p_demux_track ) { MP4_Box_t *p_stts; /* makes mapping between sample and decoding time, ctts make same mapping but for composition time, not yet used and probably not usefull */ MP4_Box_t *p_stsz; /* gives sample size of each samples, there is also stz2 that uses a compressed form FIXME make them in libmp4 as a unique type */ /* TODO use also stss and stsh table for seeking */ /* FIXME use edit table */ int64_t i_sample; int64_t i_chunk; int64_t i_index; int64_t i_index_sample_used; int64_t i_last_dts; p_stts = MP4_BoxGet( p_demux_track->p_stbl, "stts" ); p_stsz = MP4_BoxGet( p_demux_track->p_stbl, "stsz" ); /* FIXME and stz2 */ if( ( !p_stts )||( !p_stsz ) ) { msg_Warn( p_input, "cannot read sample table" ); return( VLC_EGENERIC ); } p_demux_track->i_sample_count = p_stsz->data.p_stsz->i_sample_count; /* for sample size, there are 2 case */ if( p_stsz->data.p_stsz->i_sample_size ) { /* 1: all sample have the same size, so no need to construct a table */ p_demux_track->i_sample_size = p_stsz->data.p_stsz->i_sample_size; p_demux_track->p_sample_size = NULL; } else { /* 2: each sample can have a different size */ p_demux_track->i_sample_size = 0; p_demux_track->p_sample_size = calloc( p_demux_track->i_sample_count, sizeof( uint32_t ) ); for( i_sample = 0; i_sample < p_demux_track->i_sample_count; i_sample++ ) { p_demux_track->p_sample_size[i_sample] = p_stsz->data.p_stsz->i_entry_size[i_sample]; } } /* we have extract all information from stsz, now use stts */ /* if we don't want to waste too much memory, we can't expand the box !, so each chunk will contain an "extract" of this table for fast research */ i_last_dts = 0; i_index = 0; i_index_sample_used =0; /* create and init last data for each chunk */ for(i_chunk = 0 ; i_chunk < p_demux_track->i_chunk_count; i_chunk++ ) { int64_t i_entry, i_sample_count, i; /* save last dts */ p_demux_track->chunk[i_chunk].i_first_dts = i_last_dts; /* count how many entries needed for this chunk for p_sample_delta_dts and p_sample_count_dts */ i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count; i_entry = 0; while( i_sample_count > 0 ) { i_sample_count -= p_stts->data.p_stts->i_sample_count[i_index+i_entry]; if( i_entry == 0 ) { i_sample_count += i_index_sample_used; /* don't count already used sample int this entry */ } i_entry++; } /* allocate them */ p_demux_track->chunk[i_chunk].p_sample_count_dts = calloc( i_entry, sizeof( uint32_t ) ); p_demux_track->chunk[i_chunk].p_sample_delta_dts = calloc( i_entry, sizeof( uint32_t ) ); /* now copy */ i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count; for( i = 0; i < i_entry; i++ ) { int64_t i_used; int64_t i_rest; i_rest = p_stts->data.p_stts->i_sample_count[i_index] - i_index_sample_used; i_used = __MIN( i_rest, i_sample_count ); i_index_sample_used += i_used; i_sample_count -= i_used; p_demux_track->chunk[i_chunk].p_sample_count_dts[i] = i_used; p_demux_track->chunk[i_chunk].p_sample_delta_dts[i] = p_stts->data.p_stts->i_sample_delta[i_index]; i_last_dts += i_used * p_demux_track->chunk[i_chunk].p_sample_delta_dts[i]; if( i_index_sample_used >= p_stts->data.p_stts->i_sample_count[i_index] ) { i_index++; i_index_sample_used = 0; } } } msg_Dbg( p_input, "track[Id 0x%x] read %d samples length:"I64Fd"s", p_demux_track->i_track_ID, p_demux_track->i_sample_count, i_last_dts / p_demux_track->i_timescale ); return( VLC_SUCCESS ); } /* * TrackCreateES: * Create ES and PES to init decoder if needed, for a track starting at i_chunk */ static int TrackCreateES ( input_thread_t *p_input, track_data_mp4_t *p_track, unsigned int i_chunk, es_out_id_t **pp_es ) { MP4_Box_t *p_sample; MP4_Box_t *p_esds; *pp_es = NULL; if( !p_track->chunk[i_chunk].i_sample_description_index ) { msg_Warn( p_input, "invalid SampleEntry index (track[Id 0x%x])", p_track->i_track_ID ); return VLC_EGENERIC; } p_sample = MP4_BoxGet( p_track->p_stsd, "[%d]", p_track->chunk[i_chunk].i_sample_description_index - 1 ); if( !p_sample || !p_sample->data.p_data ) { msg_Warn( p_input, "cannot find SampleEntry (track[Id 0x%x])", p_track->i_track_ID ); return( VLC_EGENERIC ); } p_track->p_sample = p_sample; if( p_track->i_sample_size == 1 ) { MP4_Box_data_sample_soun_t *p_soun; p_soun = p_sample->data.p_sample_soun; if( p_soun->i_qt_version == 0 ) { switch( p_sample->i_type ) { case VLC_FOURCC( 'i', 'm', 'a', '4' ): p_soun->i_qt_version = 1; p_soun->i_sample_per_packet = 64; p_soun->i_bytes_per_packet = 34; p_soun->i_bytes_per_frame = 34 * p_soun->i_channelcount; p_soun->i_bytes_per_sample = 2; break; case VLC_FOURCC( 'M', 'A', 'C', '3' ): p_soun->i_qt_version = 1; p_soun->i_sample_per_packet = 6; p_soun->i_bytes_per_packet = 2; p_soun->i_bytes_per_frame = 2 * p_soun->i_channelcount; p_soun->i_bytes_per_sample = 2; break; case VLC_FOURCC( 'M', 'A', 'C', '6' ): p_soun->i_qt_version = 1; p_soun->i_sample_per_packet = 12; p_soun->i_bytes_per_packet = 2; p_soun->i_bytes_per_frame = 2 * p_soun->i_channelcount; p_soun->i_bytes_per_sample = 2; break; default: break; } } else if( p_soun->i_qt_version == 1 && p_soun->i_sample_per_packet <= 0 ) { p_soun->i_qt_version = 0; } } /* It's a little ugly but .. there are special cases */ switch( p_sample->i_type ) { case( VLC_FOURCC( '.', 'm', 'p', '3' ) ): case( VLC_FOURCC( 'm', 's', 0x00, 0x55 ) ): p_track->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'a' ); break; case( VLC_FOURCC( 'r', 'a', 'w', ' ' ) ): p_track->fmt.i_codec = VLC_FOURCC( 'a', 'r', 'a', 'w' ); break; case( VLC_FOURCC( 's', '2', '6', '3' ) ): p_track->fmt.i_codec = VLC_FOURCC( 'h', '2', '6', '3' ); break; default: p_track->fmt.i_codec = p_sample->i_type; break; } /* now see if esds is present and if so create a data packet with decoder_specific_info */ #define p_decconfig p_esds->data.p_esds->es_descriptor.p_decConfigDescr if( ( ( p_esds = MP4_BoxGet( p_sample, "esds" ) ) || ( p_esds = MP4_BoxGet( p_sample, "wave/esds" ) ) )&& ( p_esds->data.p_esds )&& ( p_decconfig ) ) { /* First update information based on i_objectTypeIndication */ switch( p_decconfig->i_objectTypeIndication ) { case( 0x20 ): /* MPEG4 VIDEO */ p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','v' ); break; case( 0x40): p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','a' ); break; case( 0x60): case( 0x61): case( 0x62): case( 0x63): case( 0x64): case( 0x65): /* MPEG2 video */ p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' ); break; /* Theses are MPEG2-AAC */ case( 0x66): /* main profile */ case( 0x67): /* Low complexity profile */ case( 0x68): /* Scaleable Sampling rate profile */ p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','a' ); break; /* true MPEG 2 audio */ case( 0x69): p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','a' ); break; case( 0x6a): /* MPEG1 video */ p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' ); break; case( 0x6b): /* MPEG1 audio */ p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','a' ); break; case( 0x6c ): /* jpeg */ p_track->fmt.i_codec = VLC_FOURCC( 'j','p','e','g' ); break; default: /* Unknown entry, but don't touch i_fourcc */ msg_Warn( p_input, "unknown objectTypeIndication(0x%x) (Track[ID 0x%x])", p_decconfig->i_objectTypeIndication, p_track->i_track_ID ); break; } p_track->fmt.i_extra = p_decconfig->i_decoder_specific_info_len; if( p_track->fmt.i_extra > 0 ) { p_track->fmt.p_extra = malloc( p_track->fmt.i_extra ); memcpy( p_track->fmt.p_extra, p_decconfig->p_decoder_specific_info, p_track->fmt.i_extra ); } } else { switch( p_sample->i_type ) { /* qt decoder, send the complete chunk */ case VLC_FOURCC( 'S', 'V', 'Q', '3' ): case VLC_FOURCC( 'S', 'V', 'Q', '1' ): case VLC_FOURCC( 'V', 'P', '3', '1' ): case VLC_FOURCC( '3', 'I', 'V', '1' ): case VLC_FOURCC( 'Z', 'y', 'G', 'o' ): p_track->fmt.i_extra = p_sample->data.p_sample_vide->i_qt_image_description; if( p_track->fmt.i_extra > 0 ) { p_track->fmt.p_extra = malloc( p_track->fmt.i_extra ); memcpy( p_track->fmt.p_extra, p_sample->data.p_sample_vide->p_qt_image_description, p_track->fmt.i_extra); } break; case VLC_FOURCC( 'Q', 'D', 'M', 'C' ): case VLC_FOURCC( 'Q', 'D', 'M', '2' ): case VLC_FOURCC( 'Q', 'c', 'l', 'p' ): case VLC_FOURCC( 's', 'a', 'm', 'r' ): p_track->fmt.i_extra = p_sample->data.p_sample_soun->i_qt_description; if( p_track->fmt.i_extra > 0 ) { p_track->fmt.p_extra = malloc( p_track->fmt.i_extra ); memcpy( p_track->fmt.p_extra, p_sample->data.p_sample_soun->p_qt_description, p_track->fmt.i_extra); } break; default: break; } } #undef p_decconfig /* some last initialisation */ switch( p_track->fmt.i_cat ) { case( VIDEO_ES ): p_track->fmt.video.i_width = p_sample->data.p_sample_vide->i_width; p_track->fmt.video.i_height = p_sample->data.p_sample_vide->i_height; /* fall on display size */ if( p_track->fmt.video.i_width <= 0 ) p_track->fmt.video.i_width = p_track->i_width; if( p_track->fmt.video.i_height <= 0 ) p_track->fmt.video.i_height = p_track->i_height; /* Find out apect ratio from display size */ if( p_track->i_width > 0 && p_track->i_height > 0 ) p_track->fmt.video.i_aspect = VOUT_ASPECT_FACTOR * p_track->i_width / p_track->i_height; break; case( AUDIO_ES ): p_track->fmt.audio.i_channels = p_sample->data.p_sample_soun->i_channelcount; p_track->fmt.audio.i_rate = p_sample->data.p_sample_soun->i_sampleratehi; p_track->fmt.i_bitrate = p_sample->data.p_sample_soun->i_channelcount * p_sample->data.p_sample_soun->i_sampleratehi * p_sample->data.p_sample_soun->i_samplesize; p_track->fmt.audio.i_bitspersample = p_sample->data.p_sample_soun->i_samplesize; break; default: break; } *pp_es = es_out_Add( p_input->p_es_out, &p_track->fmt ); return VLC_SUCCESS; } /* given a time it return sample/chunk */ static int TrackTimeToSampleChunk( input_thread_t *p_input, track_data_mp4_t *p_track, uint64_t i_start, uint32_t *pi_chunk, uint32_t *pi_sample ) { MP4_Box_t *p_stss; uint64_t i_dts; unsigned int i_sample; unsigned int i_chunk; int i_index; /* convert absolute time to in timescale unit */ i_start = i_start * (mtime_t)p_track->i_timescale / (mtime_t)1000000; /* FIXME see if it's needed to check p_track->i_chunk_count */ if( !p_track->b_ok || p_track->i_chunk_count == 0 ) { return( VLC_EGENERIC ); } /* we start from sample 0/chunk 0, hope it won't take too much time */ /* *** find good chunk *** */ for( i_chunk = 0; ; i_chunk++ ) { if( i_chunk + 1 >= p_track->i_chunk_count ) { /* at the end and can't check if i_start in this chunk, it will be check while searching i_sample */ i_chunk = p_track->i_chunk_count - 1; break; } if( i_start >= p_track->chunk[i_chunk].i_first_dts && i_start < p_track->chunk[i_chunk + 1].i_first_dts ) { break; } } /* *** find sample in the chunk *** */ i_sample = p_track->chunk[i_chunk].i_sample_first; i_dts = p_track->chunk[i_chunk].i_first_dts; for( i_index = 0; i_sample < p_track->chunk[i_chunk].i_sample_count; ) { if( i_dts + p_track->chunk[i_chunk].p_sample_count_dts[i_index] * p_track->chunk[i_chunk].p_sample_delta_dts[i_index] < i_start ) { i_dts += p_track->chunk[i_chunk].p_sample_count_dts[i_index] * p_track->chunk[i_chunk].p_sample_delta_dts[i_index]; i_sample += p_track->chunk[i_chunk].p_sample_count_dts[i_index]; i_index++; } else { if( p_track->chunk[i_chunk].p_sample_delta_dts[i_index] <= 0 ) { break; } i_sample += ( i_start - i_dts ) / p_track->chunk[i_chunk].p_sample_delta_dts[i_index]; break; } } if( i_sample >= p_track->i_sample_count ) { msg_Warn( p_input, "track[Id 0x%x] will be disabled (seeking too far) chunk=%d sample=%d", p_track->i_track_ID, i_chunk, i_sample ); return( VLC_EGENERIC ); } /* *** Try to find nearest sync points *** */ if( ( p_stss = MP4_BoxGet( p_track->p_stbl, "stss" ) ) ) { unsigned int i_index; msg_Dbg( p_input, "track[Id 0x%x] using Sync Sample Box (stss)", p_track->i_track_ID ); for( i_index = 0; i_index < p_stss->data.p_stss->i_entry_count; i_index++ ) { if( p_stss->data.p_stss->i_sample_number[i_index] >= i_sample ) { if( i_index > 0 ) { msg_Dbg( p_input, "stts gives %d --> %d (sample number)", i_sample, p_stss->data.p_stss->i_sample_number[i_index-1] ); i_sample = p_stss->data.p_stss->i_sample_number[i_index-1]; /* new i_sample is less than old so i_chunk can only decreased */ while( i_chunk > 0 && i_sample < p_track->chunk[i_chunk].i_sample_first ) { i_chunk--; } } else { msg_Dbg( p_input, "stts gives %d --> %d (sample number)", i_sample, p_stss->data.p_stss->i_sample_number[i_index] ); i_sample = p_stss->data.p_stss->i_sample_number[i_index]; /* new i_sample is more than old so i_chunk can only increased */ while( i_chunk < p_track->i_chunk_count - 1 && i_sample >= p_track->chunk[i_chunk].i_sample_first + p_track->chunk[i_chunk].i_sample_count ) { i_chunk++; } } break; } } } else { msg_Dbg( p_input, "track[Id 0x%x] does not provide Sync Sample Box (stss)", p_track->i_track_ID ); } if( pi_chunk ) *pi_chunk = i_chunk; if( pi_sample ) *pi_sample = i_sample; return( VLC_SUCCESS ); } static int TrackGotoChunkSample( input_thread_t *p_input, track_data_mp4_t *p_track, unsigned int i_chunk, unsigned int i_sample ) { vlc_bool_t b_reselect = VLC_FALSE; /* now see if actual es is ok */ if( p_track->i_chunk < 0 || p_track->i_chunk >= p_track->i_chunk_count || p_track->chunk[p_track->i_chunk].i_sample_description_index != p_track->chunk[i_chunk].i_sample_description_index ) { msg_Warn( p_input, "Recreate ES" ); es_out_Control( p_input->p_es_out, ES_OUT_GET_ES_STATE, p_track->p_es, &b_reselect ); es_out_Del( p_input->p_es_out, p_track->p_es ); p_track->p_es = NULL; if( TrackCreateES( p_input, p_track, i_chunk, &p_track->p_es ) ) { msg_Err( p_input, "cannot create es for track[Id 0x%x]", p_track->i_track_ID ); p_track->b_ok = VLC_FALSE; p_track->b_selected = VLC_FALSE; return VLC_EGENERIC; } } /* select again the new decoder */ if( b_reselect ) { es_out_Control( p_input->p_es_out, ES_OUT_SET_ES, p_track->p_es ); } p_track->i_chunk = i_chunk; p_track->i_sample = i_sample; return p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC; } /**************************************************************************** * MP4_TrackCreate: **************************************************************************** * Parse track information and create all needed data to run a track * If it succeed b_ok is set to 1 else to 0 ****************************************************************************/ static void MP4_TrackCreate( input_thread_t *p_input, track_data_mp4_t *p_track, MP4_Box_t * p_box_trak ) { MP4_Box_t *p_tkhd = MP4_BoxGet( p_box_trak, "tkhd" ); MP4_Box_t *p_tref = MP4_BoxGet( p_box_trak, "tref" ); MP4_Box_t *p_elst; MP4_Box_t *p_mdhd; MP4_Box_t *p_hdlr; MP4_Box_t *p_vmhd; MP4_Box_t *p_smhd; MP4_Box_t *p_drms; unsigned int i; char language[4]; /* hint track unsuported */ /* set default value (-> track unusable) */ p_track->b_ok = VLC_FALSE; p_track->b_enable = VLC_FALSE; p_track->b_selected = VLC_FALSE; es_format_Init( &p_track->fmt, UNKNOWN_ES, 0 ); if( !p_tkhd ) { return; } /* do we launch this track by default ? */ p_track->b_enable = ( ( p_tkhd->data.p_tkhd->i_flags&MP4_TRACK_ENABLED ) != 0 ); p_track->i_track_ID = p_tkhd->data.p_tkhd->i_track_ID; p_track->i_width = p_tkhd->data.p_tkhd->i_width / 65536; p_track->i_height = p_tkhd->data.p_tkhd->i_height / 65536; if( ( p_elst = MP4_BoxGet( p_box_trak, "edts/elst" ) ) ) { /* msg_Warn( p_input, "unhandled box: edts --> FIXME" ); */ } if( p_tref ) { /* msg_Warn( p_input, "unhandled box: tref --> FIXME" ); */ } p_mdhd = MP4_BoxGet( p_box_trak, "mdia/mdhd" ); p_hdlr = MP4_BoxGet( p_box_trak, "mdia/hdlr" ); if( ( !p_mdhd )||( !p_hdlr ) ) { return; } p_track->i_timescale = p_mdhd->data.p_mdhd->i_timescale; for( i = 0; i < 3; i++ ) { language[i] = p_mdhd->data.p_mdhd->i_language[i]; } language[3] = '\0'; switch( p_hdlr->data.p_hdlr->i_handler_type ) { case( FOURCC_soun ): if( !( p_smhd = MP4_BoxGet( p_box_trak, "mdia/minf/smhd" ) ) ) { return; } p_track->fmt.i_cat = AUDIO_ES; break; case( FOURCC_vide ): if( !( p_vmhd = MP4_BoxGet( p_box_trak, "mdia/minf/vmhd" ) ) ) { return; } p_track->fmt.i_cat = VIDEO_ES; break; default: return; } /* TODO add support for: p_dinf = MP4_BoxGet( p_minf, "dinf" ); */ if( !( p_track->p_stbl = MP4_BoxGet( p_box_trak,"mdia/minf/stbl" ) ) || !( p_track->p_stsd = MP4_BoxGet( p_box_trak,"mdia/minf/stbl/stsd") ) ) { return; } p_drms = MP4_BoxGet( p_track->p_stsd, "drms" ); p_track->p_drms = p_drms != NULL ? p_drms->data.p_sample_soun->p_drms : NULL; msg_Dbg( p_input, "drms%sinitialized", p_track->p_drms == NULL ? " not " : " " ); /* Set language */ if( strcmp( language, "```" ) && strcmp( language, "und" ) ) { p_track->fmt.psz_language = strdup( language ); } /* fxi i_timescale for AUDIO_ES with i_qt_version == 0 */ if( p_track->fmt.i_cat == AUDIO_ES ) //&& p_track->i_sample_size == 1 ) { MP4_Box_t *p_sample; p_sample = MP4_BoxGet( p_track->p_stsd, "[0]" ); if( p_sample && p_sample->data.p_sample_soun) { MP4_Box_data_sample_soun_t *p_soun = p_sample->data.p_sample_soun; if( p_soun->i_qt_version == 0 && p_track->i_timescale != p_soun->i_sampleratehi ) { msg_Warn( p_input, "i_timescale ("I64Fu") != i_sampleratehi (%u) with " "qt_version == 0\n" "Making both equal. (report any problem)", p_track->i_timescale, p_soun->i_sampleratehi ); if( p_soun->i_sampleratehi ) p_track->i_timescale = p_soun->i_sampleratehi; else p_soun->i_sampleratehi = p_track->i_timescale; } } } /* Create chunk index table and sample index table */ if( TrackCreateChunksIndex( p_input,p_track ) || TrackCreateSamplesIndex( p_input, p_track ) ) { return; /* cannot create chunks index */ } p_track->i_chunk = 0; p_track->i_sample = 0; /* now create es */ if( TrackCreateES( p_input, p_track, p_track->i_chunk, &p_track->p_es ) ) { msg_Err( p_input, "cannot create es for track[Id 0x%x]", p_track->i_track_ID ); return; } #if 0 { int i; for( i = 0; i < p_track->i_chunk_count; i++ ) { fprintf( stderr, "%-5d sample_count=%d pts=%lld\n", i, p_track->chunk[i].i_sample_count, p_track->chunk[i].i_first_dts ); } } #endif p_track->b_ok = VLC_TRUE; } /**************************************************************************** * MP4_TrackDestroy: **************************************************************************** * Destroy a track created by MP4_TrackCreate. ****************************************************************************/ static void MP4_TrackDestroy( input_thread_t *p_input, track_data_mp4_t *p_track ) { unsigned int i_chunk; p_track->b_ok = VLC_FALSE; p_track->b_enable = VLC_FALSE; p_track->b_selected = VLC_FALSE; es_format_Init( &p_track->fmt, UNKNOWN_ES, 0 ); for( i_chunk = 0; i_chunk < p_track->i_chunk_count; i_chunk++ ) { if( p_track->chunk ) { FREE(p_track->chunk[i_chunk].p_sample_count_dts); FREE(p_track->chunk[i_chunk].p_sample_delta_dts ); } } FREE( p_track->chunk ); if( !p_track->i_sample_size ) { FREE( p_track->p_sample_size ); } } static int MP4_TrackSelect ( input_thread_t *p_input, track_data_mp4_t *p_track, mtime_t i_start ) { uint32_t i_chunk; uint32_t i_sample; if( !p_track->b_ok ) { return( VLC_EGENERIC ); } if( p_track->b_selected ) { msg_Warn( p_input, "track[Id 0x%x] already selected", p_track->i_track_ID ); return( VLC_SUCCESS ); } if( TrackTimeToSampleChunk( p_input, p_track, i_start, &i_chunk, &i_sample ) ) { msg_Warn( p_input, "cannot select track[Id 0x%x]", p_track->i_track_ID ); return( VLC_EGENERIC ); } p_track->b_selected = VLC_TRUE; if( TrackGotoChunkSample( p_input, p_track, i_chunk, i_sample ) ) { p_track->b_selected = VLC_FALSE; } return p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC; } static void MP4_TrackUnselect(input_thread_t *p_input, track_data_mp4_t *p_track ) { if( !p_track->b_ok ) { return; } if( !p_track->b_selected ) { msg_Warn( p_input, "track[Id 0x%x] already unselected", p_track->i_track_ID ); return; } if( p_track->p_es ) { es_out_Control( p_input->p_es_out, ES_OUT_SET_ES_STATE, p_track->p_es, VLC_FALSE ); } p_track->b_selected = VLC_FALSE; } static int MP4_TrackSeek ( input_thread_t *p_input, track_data_mp4_t *p_track, mtime_t i_start ) { uint32_t i_chunk; uint32_t i_sample; if( !p_track->b_ok ) { return( VLC_EGENERIC ); } if( TrackTimeToSampleChunk( p_input, p_track, i_start, &i_chunk, &i_sample ) ) { msg_Warn( p_input, "cannot select track[Id 0x%x]", p_track->i_track_ID ); return( VLC_EGENERIC ); } p_track->b_selected = VLC_TRUE; TrackGotoChunkSample( p_input, p_track, i_chunk, i_sample ); return( p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC ); } /* * 3 types: for audio * */ #define QT_V0_MAX_SAMPLES 1500 static int MP4_TrackSampleSize( track_data_mp4_t *p_track ) { int i_size; MP4_Box_data_sample_soun_t *p_soun; if( p_track->i_sample_size == 0 ) { /* most simple case */ return( p_track->p_sample_size[p_track->i_sample] ); } if( p_track->fmt.i_cat != AUDIO_ES ) { return( p_track->i_sample_size ); } if( p_track->i_sample_size != 1 ) { //msg_Warn( p_input, "SampleSize != 1" ); return( p_track->i_sample_size ); } p_soun = p_track->p_sample->data.p_sample_soun; if( p_soun->i_qt_version == 1 ) { i_size = p_track->chunk[p_track->i_chunk].i_sample_count / p_soun->i_sample_per_packet * p_soun->i_bytes_per_frame; } else { /* FIXME */ int i_samples = p_track->chunk[p_track->i_chunk].i_sample_count - ( p_track->i_sample - p_track->chunk[p_track->i_chunk].i_sample_first ); if( i_samples > QT_V0_MAX_SAMPLES ) { i_samples = QT_V0_MAX_SAMPLES; } i_size = i_samples * p_soun->i_channelcount * p_soun->i_samplesize / 8; } //fprintf( stderr, "size=%d\n", i_size ); return( i_size ); } static uint64_t MP4_GetTrackPos( track_data_mp4_t *p_track ) { unsigned int i_sample; uint64_t i_pos; i_pos = p_track->chunk[p_track->i_chunk].i_offset; if( p_track->i_sample_size ) { MP4_Box_data_sample_soun_t *p_soun = p_track->p_sample->data.p_sample_soun; if( p_soun->i_qt_version == 0 ) { i_pos += ( p_track->i_sample - p_track->chunk[p_track->i_chunk].i_sample_first ) * p_soun->i_channelcount * p_soun->i_samplesize / 8; } else { /* we read chunk by chunk */ i_pos += 0; } } else { for( i_sample = p_track->chunk[p_track->i_chunk].i_sample_first; i_sample < p_track->i_sample; i_sample++ ) { i_pos += p_track->p_sample_size[i_sample]; } } return( i_pos ); } static int MP4_TrackNextSample( input_thread_t *p_input, track_data_mp4_t *p_track ) { if( p_track->fmt.i_cat == AUDIO_ES && p_track->i_sample_size != 0 ) { MP4_Box_data_sample_soun_t *p_soun; p_soun = p_track->p_sample->data.p_sample_soun; if( p_soun->i_qt_version == 1 ) { /* chunk by chunk */ p_track->i_sample = p_track->chunk[p_track->i_chunk].i_sample_first + p_track->chunk[p_track->i_chunk].i_sample_count; } else { /* FIXME */ p_track->i_sample += QT_V0_MAX_SAMPLES; if( p_track->i_sample > p_track->chunk[p_track->i_chunk].i_sample_first + p_track->chunk[p_track->i_chunk].i_sample_count ) { p_track->i_sample = p_track->chunk[p_track->i_chunk].i_sample_first + p_track->chunk[p_track->i_chunk].i_sample_count; } } } else { p_track->i_sample++; } if( p_track->i_sample >= p_track->i_sample_count ) { /* we have reach end of the track so free decoder stuff */ msg_Warn( p_input, "track[0x%x] will be disabled", p_track->i_track_ID ); MP4_TrackUnselect( p_input, p_track ); return( VLC_EGENERIC ); } /* Have we changed chunk ? */ if( p_track->i_sample >= p_track->chunk[p_track->i_chunk].i_sample_first + p_track->chunk[p_track->i_chunk].i_sample_count ) { if( TrackGotoChunkSample( p_input, p_track, p_track->i_chunk + 1, p_track->i_sample ) ) { msg_Warn( p_input, "track[0x%x] will be disabled (cannot restart decoder)", p_track->i_track_ID ); MP4_TrackUnselect( p_input, p_track ); return( VLC_EGENERIC ); } } return( VLC_SUCCESS ); }