mp4.c
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上传日期:2009-03-27
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文件大小:68k
- /*****************************************************************************
- * mp4.c : MP4 file input module for vlc
- *****************************************************************************
- * Copyright (C) 2001-2004 VideoLAN
- * $Id: mp4.c 9142 2004-11-04 22:32:40Z hartman $
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- *
- * 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 <stdlib.h> /* malloc(), free() */
- #include <vlc/vlc.h>
- #include <vlc/input.h>
- #include <vlc_playlist.h>
- #include "iso_lang.h"
- #include "vlc_meta.h"
- #include "libmp4.h"
- #include "drms.h"
- #ifdef UNDER_CE
- #define uint64_t int64_t
- #endif
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Open ( vlc_object_t * );
- static void Close( vlc_object_t * );
- vlc_module_begin();
- set_description( _("MP4 stream demuxer") );
- set_capability( "demux2", 242 );
- set_callbacks( Open, Close );
- vlc_module_end();
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static int Demux ( demux_t * );
- static int DemuxRef( demux_t *p_demux )
- {
- return 0;
- }
- static int Seek ( demux_t *, mtime_t );
- static int Control ( demux_t *, int, va_list );
- /* Contain all information about a chunk */
- typedef struct
- {
- uint64_t i_offset; /* absolute position of this chunk in the file */
- uint32_t i_sample_description_index; /* index for SampleEntry to use */
- uint32_t i_sample_count; /* how many samples in this chunk */
- uint32_t i_sample_first; /* index of the first sample in this chunk */
- /* now provide way to calculate pts, dts, and offset without to
- much memory and with fast acces */
- /* with this we can calculate dts/pts without waste memory */
- uint64_t i_first_dts;
- uint32_t *p_sample_count_dts;
- uint32_t *p_sample_delta_dts; /* dts delta */
- /* TODO if needed add pts
- but quickly *add* support for edts and seeking */
- } mp4_chunk_t;
- /* Contain all needed information for read all track with vlc */
- typedef struct
- {
- int i_track_ID; /* this should be unique */
- int b_ok; /* The track is usable */
- int b_enable; /* is the trak enable by default */
- vlc_bool_t b_selected; /* is the trak being played */
- es_format_t fmt;
- es_out_id_t *p_es;
- /* display size only ! */
- int i_width;
- int i_height;
- /* more internal data */
- uint64_t i_timescale; /* time scale for this track only */
- /* elst */
- int i_elst; /* current elst */
- int64_t i_elst_time; /* current elst start time (in movie time scale)*/
- MP4_Box_t *p_elst; /* elst (could be NULL) */
- /* give the next sample to read, i_chunk is to find quickly where
- the sample is located */
- uint32_t i_sample; /* next sample to read */
- uint32_t i_chunk; /* chunk where next sample is stored */
- /* total count of chunk and sample */
- uint32_t i_chunk_count;
- uint32_t i_sample_count;
- mp4_chunk_t *chunk; /* always defined for each chunk */
- /* sample size, p_sample_size defined only if i_sample_size == 0
- else i_sample_size is size for all sample */
- uint32_t i_sample_size;
- uint32_t *p_sample_size; /* XXX perhaps add file offset if take
- too much time to do sumations each time*/
- MP4_Box_t *p_stbl; /* will contain all timing information */
- MP4_Box_t *p_stsd; /* will contain all data to initialize decoder */
- MP4_Box_t *p_sample;/* point on actual sdsd */
- vlc_bool_t b_drms;
- void *p_drms;
- } mp4_track_t;
- struct demux_sys_t
- {
- MP4_Box_t *p_root; /* container for the whole file */
- mtime_t i_pcr;
- uint64_t i_time; /* time position of the presentation
- * in movie timescale */
- uint64_t i_timescale; /* movie time scale */
- uint64_t i_duration; /* movie duration */
- unsigned int i_tracks; /* number of tracks */
- mp4_track_t *track; /* array of track */
- };
- /*****************************************************************************
- * Declaration of local function
- *****************************************************************************/
- static void MP4_TrackCreate ( demux_t *, mp4_track_t *, MP4_Box_t *);
- static void MP4_TrackDestroy( demux_t *, mp4_track_t * );
- static int MP4_TrackSelect ( demux_t *, mp4_track_t *, mtime_t );
- static void MP4_TrackUnselect(demux_t *, mp4_track_t * );
- static int MP4_TrackSeek ( demux_t *, mp4_track_t *, mtime_t );
- static uint64_t MP4_TrackGetPos ( mp4_track_t * );
- static int MP4_TrackSampleSize( mp4_track_t * );
- static int MP4_TrackNextSample( demux_t *, mp4_track_t * );
- static void MP4_TrackSetELST( demux_t *, mp4_track_t *, int64_t );
- /* Return time in 祍 of a track */
- static inline int64_t MP4_TrackGetPTS( demux_t *p_demux, mp4_track_t *p_track )
- {
- unsigned int i_sample;
- unsigned int i_index;
- int64_t i_dts;
- i_sample = p_track->i_sample - p_track->chunk[p_track->i_chunk].i_sample_first;
- i_dts = p_track->chunk[p_track->i_chunk].i_first_dts;
- i_index = 0;
- while( i_sample > 0 )
- {
- if( i_sample > p_track->chunk[p_track->i_chunk].p_sample_count_dts[i_index] )
- {
- i_dts += p_track->chunk[p_track->i_chunk].p_sample_count_dts[i_index] *
- p_track->chunk[p_track->i_chunk].p_sample_delta_dts[i_index];
- i_sample -= p_track->chunk[p_track->i_chunk].p_sample_count_dts[i_index];
- i_index++;
- }
- else
- {
- i_dts += i_sample *
- p_track->chunk[p_track->i_chunk].p_sample_delta_dts[i_index];
- i_sample = 0;
- break;
- }
- }
- /* now handle elst */
- if( p_track->p_elst )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
- /* convert to offset */
- if( ( elst->i_media_rate_integer[p_track->i_elst] > 0 ||
- elst->i_media_rate_fraction[p_track->i_elst] > 0 ) &&
- elst->i_media_time[p_track->i_elst] > 0 )
- {
- i_dts -= elst->i_media_time[p_track->i_elst];
- }
- /* add i_elst_time */
- i_dts += p_track->i_elst_time * p_track->i_timescale / p_sys->i_timescale;
- if( i_dts < 0 ) i_dts = 0;
- }
- return (int64_t)1000000 * i_dts / p_track->i_timescale;
- }
- static inline int64_t MP4_GetMoviePTS(demux_sys_t *p_sys )
- {
- return (int64_t)1000000 * p_sys->i_time / p_sys->i_timescale;
- }
- #define FREE( p ) if( p ) { free( p ); (p) = NULL;}
- /*****************************************************************************
- * Open: check file and initializes MP4 structures
- *****************************************************************************/
- static int Open( vlc_object_t * p_this )
- {
- demux_t *p_demux = (demux_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_demux->s, &p_peek, 8 ) < 8 )
- {
- msg_Warn( p_demux, "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:
- case VLC_FOURCC( 'p', 'n', 'o', 't' ):
- break;
- default:
- msg_Warn( p_demux, "MP4 plugin discarded (not a valid file)" );
- return VLC_EGENERIC;
- }
- /* I need to seek */
- stream_Control( p_demux->s, STREAM_CAN_SEEK, &b_seekable );
- if( !b_seekable )
- {
- msg_Warn( p_demux, "MP4 plugin discarded (unseekable)" );
- return VLC_EGENERIC;
- }
- /*Set exported functions */
- p_demux->pf_demux = Demux;
- p_demux->pf_control = Control;
- /* create our structure that will contains all data */
- p_demux->p_sys = 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_demux->s ) ) == NULL )
- {
- msg_Warn( p_demux, "MP4 plugin discarded (not a valid file)" );
- goto error;
- }
- MP4_BoxDumpStructure( p_demux->s, 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_demux,
- "ISO Media file (isom) version %d.",
- p_ftyp->data.p_ftyp->i_minor_version );
- break;
- default:
- msg_Dbg( p_demux,
- "unrecognized major file specification (%4.4s).",
- (char*)&p_ftyp->data.p_ftyp->i_major_brand );
- break;
- }
- }
- else
- {
- msg_Dbg( p_demux, "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_demux, "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_demux, "detected playlist mov file (%d ref)", i_count );
- p_playlist =
- (playlist_t *)vlc_object_find( p_demux,
- 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;
- int i_position = p_playlist->i_index;
- 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_demux, "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_demux, "ignoring pseudo ref =`%s'", psz_ref );
- continue;
- }
- if( !strncmp( psz_ref, "http://", 7 ) ||
- !strncmp( psz_ref, "rtsp://", 7 ) )
- {
- msg_Dbg( p_demux, "adding ref = `%s'", psz_ref );
- playlist_Add( p_playlist, psz_ref, psz_ref,
- PLAYLIST_APPEND, i_position );
- }
- else
- {
- /* msg dbg relative ? */
- char *psz_absolute = alloca( strlen( p_demux->psz_access ) + 3 + strlen( p_demux->psz_path ) + strlen( psz_ref ) + 1);
- char *end = strrchr( p_demux->psz_path, '/' );
- if( end )
- {
- int i_len = end + 1 - p_demux->psz_path;
- strcpy( psz_absolute, p_demux->psz_access );
- strcat( psz_absolute, "://" );
- strncat( psz_absolute, p_demux->psz_path, i_len);
- }
- else
- {
- strcpy( psz_absolute, "" );
- }
- strcat( psz_absolute, psz_ref );
- msg_Dbg( p_demux, "adding ref = `%s'", psz_absolute );
- playlist_Add( p_playlist, psz_absolute, psz_absolute,
- PLAYLIST_APPEND, i_position );
- }
- }
- else
- {
- msg_Err( p_demux, "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_demux, "can't find playlist" );
- }
- }
- if( !(p_mvhd = MP4_BoxGet( p_sys->p_root, "/moov/mvhd" ) ) )
- {
- if( !p_rmra )
- {
- msg_Err( p_demux, "cannot find /moov/mvhd" );
- goto error;
- }
- else
- {
- msg_Warn( p_demux, "cannot find /moov/mvhd (pure ref file)" );
- p_demux->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_demux, "cannot find any /moov/trak" );
- goto error;
- }
- msg_Dbg( p_demux, "find %d track%c",
- p_sys->i_tracks,
- p_sys->i_tracks ? 's':' ' );
- /* allocate memory */
- p_sys->track = calloc( p_sys->i_tracks, sizeof( mp4_track_t ) );
- memset( p_sys->track, 0, p_sys->i_tracks * sizeof( mp4_track_t ) );
- /* now process each track and extract all usefull information */
- for( i = 0; i < p_sys->i_tracks; i++ )
- {
- p_trak = MP4_BoxGet( p_sys->p_root, "/moov/trak[%d]", i );
- MP4_TrackCreate( p_demux, &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;
- case( SPU_ES ):
- psz_cat = "subtitle";
- break;
- default:
- psz_cat = "unknown";
- break;
- }
- msg_Dbg( p_demux, "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_demux, "ignoring track[Id 0x%x]", p_sys->track[i].i_track_ID );
- }
- }
- return VLC_SUCCESS;
- error:
- if( p_sys->p_root )
- {
- MP4_BoxFree( p_demux->s, 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( demux_t *p_demux )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- unsigned int i_track;
- unsigned int i_track_selected;
- /* check for newly selected/unselected track */
- for( i_track = 0, i_track_selected = 0; i_track < p_sys->i_tracks;
- i_track++ )
- {
- mp4_track_t *tk = &p_sys->track[i_track];
- if( tk->b_selected && tk->i_sample >= tk->i_sample_count )
- {
- msg_Warn( p_demux, "track[0x%x] will be disabled", tk->i_track_ID );
- MP4_TrackUnselect( p_demux, tk);
- }
- else if( tk->b_ok )
- {
- vlc_bool_t b;
- es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
- if( tk->b_selected && !b )
- {
- MP4_TrackUnselect( p_demux, tk );
- }
- else if( !tk->b_selected && b)
- {
- MP4_TrackSelect( p_demux, tk, MP4_GetMoviePTS( p_sys ) );
- }
- if( tk->b_selected )
- {
- i_track_selected++;
- }
- }
- }
- if( i_track_selected <= 0 )
- {
- p_sys->i_time += __MAX( p_sys->i_timescale / 10 , 1 );
- if( p_sys->i_timescale > 0 )
- {
- int64_t i_length = (mtime_t)1000000 *
- (mtime_t)p_sys->i_duration /
- (mtime_t)p_sys->i_timescale;
- if( MP4_GetMoviePTS( p_sys ) >= i_length )
- return 0;
- return 1;
- }
- msg_Warn( p_demux, "no track selected, exiting..." );
- return 0;
- }
- /* first wait for the good time to read a packet */
- es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr + 1 );
- p_sys->i_pcr = MP4_GetMoviePTS( p_sys );
- /* we will read 100ms for each stream so ...*/
- p_sys->i_time += __MAX( p_sys->i_timescale / 10 , 1 );
- for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
- {
- mp4_track_t *tk = &p_sys->track[i_track];
- if( !tk->b_ok || !tk->b_selected )
- {
- continue;
- }
- while( MP4_TrackGetPTS( p_demux, tk ) < MP4_GetMoviePTS( p_sys ) )
- {
- #if 0
- msg_Dbg( p_demux, "tk=%lld mv=%lld",
- MP4_TrackGetPTS( p_demux, tk ),
- MP4_GetMoviePTS( p_sys ) );
- #endif
- if( MP4_TrackSampleSize( tk ) > 0 )
- {
- block_t *p_block;
- /* go,go go ! */
- if( stream_Seek( p_demux->s, MP4_TrackGetPos( tk ) ) )
- {
- msg_Warn( p_demux, "track[0x%x] will be disabled (eof?)", tk->i_track_ID );
- MP4_TrackUnselect( p_demux, tk );
- break;
- }
- /* now read pes */
- if( ( p_block = stream_Block( p_demux->s,
- MP4_TrackSampleSize( tk ) ) ) == NULL )
- {
- msg_Warn( p_demux, "track[0x%x] will be disabled (eof?)", tk->i_track_ID );
- MP4_TrackUnselect( p_demux, tk );
- break;
- }
- if( tk->b_drms && tk->p_drms )
- {
- drms_decrypt( tk->p_drms,
- (uint32_t*)p_block->p_buffer,
- p_block->i_buffer );
- }
- else if( tk->fmt.i_cat == SPU_ES )
- {
- if( tk->fmt.i_codec == VLC_FOURCC( 's', 'u', 'b', 't' ) && p_block->i_buffer >= 2 )
- {
- uint16_t i_size = GetWBE( p_block->p_buffer );
- if( i_size + 2 <= p_block->i_buffer )
- {
- char *p;
- /* remove the length field, and append a ' ' */
- memmove( &p_block->p_buffer[0], &p_block->p_buffer[2], i_size );
- p_block->p_buffer[i_size] = ' ';
- p_block->i_buffer = i_size + 1;
- /* convert r -> n */
- while( ( p = strchr( p_block->p_buffer, 'r' ) ) )
- {
- *p = 'n';
- }
- }
- else
- {
- /* Invalid */
- p_block->i_buffer = 0;
- }
- }
- }
- p_block->i_dts = MP4_TrackGetPTS( p_demux, tk ) + 1;
- p_block->i_pts = tk->fmt.i_cat == VIDEO_ES ? 0 : p_block->i_dts + 1;
- if( !tk->b_drms || ( tk->b_drms && tk->p_drms ) )
- {
- es_out_Send( p_demux->out, tk->p_es, p_block );
- }
- }
- /* Next sample */
- if( MP4_TrackNextSample( p_demux, tk ) )
- {
- break;
- }
- }
- }
- return 1;
- }
- /*****************************************************************************
- * Seek: Got to i_date
- ******************************************************************************/
- static int Seek( demux_t *p_demux, mtime_t i_date )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- 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;
- /* Now for each stream try to go to this time */
- for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
- {
- mp4_track_t *tk = &p_sys->track[i_track];
- MP4_TrackSeek( p_demux, tk, i_date );
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Control:
- *****************************************************************************/
- static int Control( demux_t *p_demux, int i_query, va_list args )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- 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 );
- if( p_sys->i_timescale > 0 )
- {
- i64 = (int64_t)( f * (double)1000000 *
- (double)p_sys->i_duration /
- (double)p_sys->i_timescale );
- return Seek( p_demux, i64 );
- }
- else return VLC_SUCCESS;
- case DEMUX_GET_TIME:
- pi64 = (int64_t*)va_arg( args, int64_t * );
- if( p_sys->i_timescale > 0 )
- {
- *pi64 = (mtime_t)1000000 *
- (mtime_t)p_sys->i_time /
- (mtime_t)p_sys->i_timescale;
- }
- else *pi64 = 0;
- return VLC_SUCCESS;
- case DEMUX_SET_TIME:
- i64 = (int64_t)va_arg( args, int64_t );
- return Seek( p_demux, i64 );
- case DEMUX_GET_LENGTH:
- pi64 = (int64_t*)va_arg( args, int64_t * );
- if( p_sys->i_timescale > 0 )
- {
- *pi64 = (mtime_t)1000000 *
- (mtime_t)p_sys->i_duration /
- (mtime_t)p_sys->i_timescale;
- }
- else *pi64 = 0;
- return VLC_SUCCESS;
- case DEMUX_GET_FPS:
- msg_Warn( p_demux, "DEMUX_GET_FPS unimplemented !!" );
- return VLC_EGENERIC;
- case DEMUX_GET_META:
- {
- vlc_meta_t **pp_meta = (vlc_meta_t**)va_arg( args, vlc_meta_t** );
- vlc_meta_t *meta;
- MP4_Box_t *p_udta = MP4_BoxGet( p_sys->p_root, "/moov/udta" );
- MP4_Box_t *p_0xa9xxx;
- if( p_udta == NULL )
- {
- return VLC_EGENERIC;
- }
- *pp_meta = meta = vlc_meta_New();
- for( p_0xa9xxx = p_udta->p_first; p_0xa9xxx != NULL;
- p_0xa9xxx = p_0xa9xxx->p_next )
- {
- switch( p_0xa9xxx->i_type )
- {
- case FOURCC_0xa9nam: /* Full name */
- vlc_meta_Add( meta, VLC_META_TITLE,
- p_0xa9xxx->data.p_0xa9xxx->psz_text );
- break;
- case FOURCC_0xa9aut:
- vlc_meta_Add( meta, VLC_META_AUTHOR,
- p_0xa9xxx->data.p_0xa9xxx->psz_text );
- break;
- case FOURCC_0xa9ART:
- vlc_meta_Add( meta, VLC_META_ARTIST,
- p_0xa9xxx->data.p_0xa9xxx->psz_text );
- break;
- case FOURCC_0xa9cpy:
- vlc_meta_Add( meta, VLC_META_COPYRIGHT,
- p_0xa9xxx->data.p_0xa9xxx->psz_text );
- break;
- case FOURCC_0xa9day: /* Creation Date */
- vlc_meta_Add( meta, VLC_META_DATE,
- p_0xa9xxx->data.p_0xa9xxx->psz_text );
- break;
- case FOURCC_0xa9des: /* Description */
- vlc_meta_Add( meta, VLC_META_DESCRIPTION,
- p_0xa9xxx->data.p_0xa9xxx->psz_text );
- break;
- case FOURCC_0xa9gen: /* Genre */
- vlc_meta_Add( meta, VLC_META_GENRE,
- p_0xa9xxx->data.p_0xa9xxx->psz_text );
- break;
- case FOURCC_0xa9swr:
- case FOURCC_0xa9inf: /* Information */
- case FOURCC_0xa9alb: /* Album */
- case FOURCC_0xa9dir: /* Director */
- case FOURCC_0xa9dis: /* Disclaimer */
- case FOURCC_0xa9enc: /* Encoded By */
- case FOURCC_0xa9trk: /* Track */
- case FOURCC_0xa9cmt: /* Commment */
- case FOURCC_0xa9url: /* URL */
- case FOURCC_0xa9req: /* Requirements */
- case FOURCC_0xa9fmt: /* Original Format */
- case FOURCC_0xa9dsa: /* Display Source As */
- case FOURCC_0xa9hst: /* Host Computer */
- case FOURCC_0xa9prd: /* Producer */
- case FOURCC_0xa9prf: /* Performers */
- case FOURCC_0xa9ope: /* Original Performer */
- case FOURCC_0xa9src: /* Providers Source Content */
- case FOURCC_0xa9wrt: /* Writer */
- case FOURCC_0xa9com: /* Composer */
- case FOURCC_WLOC: /* Window Location */
- /* TODO one day, but they aren't really meaningfull */
- break;
- default:
- break;
- }
- }
- return VLC_SUCCESS;
- }
- case DEMUX_GET_TITLE_INFO:
- case DEMUX_SET_NEXT_DEMUX_TIME:
- case DEMUX_SET_GROUP:
- return VLC_EGENERIC;
- default:
- msg_Warn( p_demux, "control query unimplemented !!!" );
- return VLC_EGENERIC;
- }
- }
- /*****************************************************************************
- * Close: frees unused data
- *****************************************************************************/
- static void Close ( vlc_object_t * p_this )
- {
- unsigned int i_track;
- demux_t * p_demux = (demux_t *)p_this;
- demux_sys_t *p_sys = p_demux->p_sys;
- msg_Dbg( p_demux, "freeing all memory" );
- MP4_BoxFree( p_demux->s, p_sys->p_root );
- for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
- {
- MP4_TrackDestroy( p_demux, &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( demux_t *p_demux,
- mp4_track_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_demux, "no chunk defined" );
- return( VLC_EGENERIC );
- }
- p_demux_track->chunk = calloc( p_demux_track->i_chunk_count,
- sizeof( mp4_chunk_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_demux, "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_demux,
- "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( demux_t *p_demux,
- mp4_track_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_demux, "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_demux, "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( demux_t *p_demux, mp4_track_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_demux,
- "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 && p_track->fmt.i_cat != SPU_ES ) )
- {
- msg_Warn( p_demux,
- "cannot find SampleEntry (track[Id 0x%x])",
- p_track->i_track_ID );
- return( VLC_EGENERIC );
- }
- p_track->p_sample = p_sample;
- if( p_track->fmt.i_cat == AUDIO_ES && 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;
- case VLC_FOURCC( 'a', 'l', 'a', 'w' ):
- case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
- p_soun->i_samplesize = 8;
- 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;
- case( VLC_FOURCC( 't', 'e', 'x', 't' ) ):
- p_track->fmt.i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
- /* FIXME: Not true, could be UTF-16 with a Byte Order Mark (0xfeff) */
- /* FIXME UTF-8 doesn't work here ? */
- /* p_track->fmt.subs.psz_encoding = strdup( "UTF-8" ); */
- 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;
- /* Private ID */
- case( 0xe0 ): /* NeroDigital: dvd subs */
- if( p_track->fmt.i_cat == SPU_ES )
- {
- p_track->fmt.i_codec = VLC_FOURCC( 's','p','u',' ' );
- break;
- }
- /* Fallback */
- default:
- /* Unknown entry, but don't touch i_fourcc */
- msg_Warn( p_demux,
- "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;
- /* avc1: send avcC (h264 without annexe B, ie without start code)*/
- case VLC_FOURCC( 'a', 'v', 'c', '1' ):
- {
- MP4_Box_t *p_avcC = MP4_BoxGet( p_sample, "avcC" );
- if( p_avcC )
- {
- /* Hack: use a packetizer to reecampsulate data in anexe B format */
- msg_Dbg( p_demux, "avcC: size=%d", p_avcC->data.p_avcC->i_avcC );
- p_track->fmt.i_extra = p_avcC->data.p_avcC->i_avcC;
- p_track->fmt.p_extra = malloc( p_avcC->data.p_avcC->i_avcC );
- memcpy( p_track->fmt.p_extra, p_avcC->data.p_avcC->p_avcC, p_track->fmt.i_extra );
- p_track->fmt.b_packetized = VLC_FALSE;
- }
- else
- {
- msg_Err( p_demux, "missing avcC" );
- }
- 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 &&
- /* Work-around buggy muxed files */
- p_sample->data.p_sample_vide->i_width != p_track->i_width )
- 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_demux->out, &p_track->fmt );
- return VLC_SUCCESS;
- }
- /* given a time it return sample/chunk
- * it also update elst field of the track
- */
- static int TrackTimeToSampleChunk( demux_t *p_demux, mp4_track_t *p_track,
- int64_t i_start, uint32_t *pi_chunk,
- uint32_t *pi_sample )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- MP4_Box_t *p_stss;
- uint64_t i_dts;
- unsigned int i_sample;
- unsigned int i_chunk;
- int i_index;
- /* 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 );
- }
- /* handle elst (find the correct one) */
- MP4_TrackSetELST( p_demux, p_track, i_start );
- if( p_track->p_elst && p_track->p_elst->data.p_elst->i_entry_count > 0 )
- {
- MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
- int64_t i_mvt= i_start * p_sys->i_timescale / (int64_t)1000000;
- /* now calculate i_start for this elst */
- /* offset */
- i_start -= p_track->i_elst_time * I64C(1000000) / p_sys->i_timescale;
- if( i_start < 0 )
- {
- *pi_chunk = 0;
- *pi_sample= 0;
- return VLC_SUCCESS;
- }
- /* to track time scale */
- i_start = i_start * p_track->i_timescale / (int64_t)1000000;
- /* add elst offset */
- if( ( elst->i_media_rate_integer[p_track->i_elst] > 0 ||
- elst->i_media_rate_fraction[p_track->i_elst] > 0 ) &&
- elst->i_media_time[p_track->i_elst] > 0 )
- {
- i_start += elst->i_media_time[p_track->i_elst];
- }
- msg_Dbg( p_demux, "elst (%d) gives "I64Fd"ms (movie)-> "I64Fd
- "ms (track)", p_track->i_elst,
- i_mvt * 1000 / p_sys->i_timescale,
- i_start * 1000 / p_track->i_timescale );
- }
- else
- {
- /* convert absolute time to in timescale unit */
- i_start = i_start * p_track->i_timescale / (int64_t)1000000;
- }
- /* 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_demux, "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_demux,
- "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_demux, "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_demux, "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_demux, "track[Id 0x%x] does not provide Sync "
- "Sample Box (stss)", p_track->i_track_ID );
- }
- *pi_chunk = i_chunk;
- *pi_sample = i_sample;
- return VLC_SUCCESS;
- }
- static int TrackGotoChunkSample( demux_t *p_demux, mp4_track_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 - 1 ||
- p_track->chunk[p_track->i_chunk].i_sample_description_index !=
- p_track->chunk[i_chunk].i_sample_description_index )
- {
- msg_Warn( p_demux, "recreate ES for track[Id 0x%x]",
- p_track->i_track_ID );
- es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
- p_track->p_es, &b_reselect );
- es_out_Del( p_demux->out, p_track->p_es );
- p_track->p_es = NULL;
- if( TrackCreateES( p_demux, p_track, i_chunk, &p_track->p_es ) )
- {
- msg_Err( p_demux, "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_demux->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( demux_t *p_demux, mp4_track_t *p_track,
- MP4_Box_t *p_box_trak )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- 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_udta;
- 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_tref )
- {
- /* msg_Warn( p_demux, "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] = ' ';
- 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;
- case( FOURCC_text ):
- case( FOURCC_subp ):
- p_track->fmt.i_cat = SPU_ES;
- break;
- default:
- return;
- }
- p_track->i_elst = 0;
- p_track->i_elst_time = 0;
- if( ( p_track->p_elst = p_elst = MP4_BoxGet( p_box_trak, "edts/elst" ) ) )
- {
- MP4_Box_data_elst_t *elst = p_elst->data.p_elst;
- int i;
- msg_Warn( p_demux, "elst box found" );
- for( i = 0; i < elst->i_entry_count; i++ )
- {
- msg_Dbg( p_demux, " - [%d] duration="I64Fd"ms media time="I64Fd"ms) rate=%d.%d",
- i,
- elst->i_segment_duration[i] * 1000 / p_sys->i_timescale,
- elst->i_media_time[i] >= 0 ?
- elst->i_media_time[i] * 1000 / p_track->i_timescale : -1,
- elst->i_media_rate_integer[i],
- elst->i_media_rate_fraction[i] );
- }
- }
- /* 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->b_drms = p_drms != NULL;
- p_track->p_drms = p_track->b_drms ?
- p_drms->data.p_sample_soun->p_drms : NULL;
- /* Set language */
- if( strcmp( language, "```" ) && strcmp( language, "und" ) )
- {
- p_track->fmt.psz_language = strdup( language );
- }
- p_udta = MP4_BoxGet( p_box_trak, "udta" );
- if( p_udta )
- {
- MP4_Box_t *p_0xa9xxx;
- for( p_0xa9xxx = p_udta->p_first; p_0xa9xxx != NULL;
- p_0xa9xxx = p_0xa9xxx->p_next )
- {
- switch( p_0xa9xxx->i_type )
- {
- case FOURCC_0xa9nam:
- p_track->fmt.psz_description = strdup( p_0xa9xxx->data.p_0xa9xxx->psz_text );
- break;
- }
- }
- }
- /* 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_demux,
- "i_timescale ("I64Fu") != i_sampleratehi (%u) with "
- "qt_version == 0n"
- "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_demux,p_track ) ||
- TrackCreateSamplesIndex( p_demux, p_track ) )
- {
- return; /* cannot create chunks index */
- }
- p_track->i_chunk = 0;
- p_track->i_sample = 0;
- /* now create es */
- if( TrackCreateES( p_demux,
- p_track, p_track->i_chunk,
- &p_track->p_es ) )
- {
- msg_Err( p_demux, "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=%lldn",
- 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( demux_t *p_demux, mp4_track_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_Clean( &p_track->fmt );
- 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( demux_t *p_demux, mp4_track_t *p_track,
- mtime_t i_start )
- {
- if( !p_track->b_ok )
- {
- return VLC_EGENERIC;
- }
- if( p_track->b_selected )
- {
- msg_Warn( p_demux, "track[Id 0x%x] already selected",
- p_track->i_track_ID );
- return VLC_SUCCESS;
- }
- return MP4_TrackSeek( p_demux, p_track, i_start );
- }
- static void MP4_TrackUnselect( demux_t *p_demux, mp4_track_t *p_track )
- {
- if( !p_track->b_ok )
- {
- return;
- }
- if( !p_track->b_selected )
- {
- msg_Warn( p_demux, "track[Id 0x%x] already unselected",
- p_track->i_track_ID );
- return;
- }
- if( p_track->p_es )
- {
- es_out_Control( p_demux->out, ES_OUT_SET_ES_STATE,
- p_track->p_es, VLC_FALSE );
- }
- p_track->b_selected = VLC_FALSE;
- }
- static int MP4_TrackSeek( demux_t *p_demux, mp4_track_t *p_track,
- mtime_t i_start )
- {
- uint32_t i_chunk;
- uint32_t i_sample;
- if( !p_track->b_ok )
- {
- return( VLC_EGENERIC );
- }
- p_track->b_selected = VLC_FALSE;
- if( TrackTimeToSampleChunk( p_demux, p_track, i_start,
- &i_chunk, &i_sample ) )
- {
- msg_Warn( p_demux, "cannot select track[Id 0x%x]",
- p_track->i_track_ID );
- return( VLC_EGENERIC );
- }
- p_track->b_selected = VLC_TRUE;
- if( TrackGotoChunkSample( p_demux, p_track, i_chunk, i_sample ) ==
- VLC_SUCCESS )
- {
- p_track->b_selected = VLC_TRUE;
- }
- return( p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC );
- }
- /*
- * 3 types: for audio
- *
- */
- #define QT_V0_MAX_SAMPLES 1500
- static int MP4_TrackSampleSize( mp4_track_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_demux, "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=%dn", i_size );
- return( i_size );
- }
- static uint64_t MP4_TrackGetPos( mp4_track_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( demux_t *p_demux,
- mp4_track_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_demux, "track[0x%x] will be disabled", p_track->i_track_ID );
- MP4_TrackUnselect( p_demux, 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_demux, p_track, p_track->i_chunk + 1,
- p_track->i_sample ) )
- {
- msg_Warn( p_demux, "track[0x%x] will be disabled "
- "(cannot restart decoder)", p_track->i_track_ID );
- MP4_TrackUnselect( p_demux, p_track );
- return VLC_EGENERIC;
- }
- }
- /* Have we changed elst */
- if( p_track->p_elst && p_track->p_elst->data.p_elst->i_entry_count > 0 )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
- int64_t i_mvt = MP4_TrackGetPTS( p_demux, p_track ) *
- p_sys->i_timescale / (int64_t)1000000;
- if( p_track->i_elst < elst->i_entry_count &&
- i_mvt >= p_track->i_elst_time +
- elst->i_segment_duration[p_track->i_elst] )
- {
- MP4_TrackSetELST( p_demux, p_track,
- MP4_TrackGetPTS( p_demux, p_track ) );
- }
- }
- return VLC_SUCCESS;
- }
- static void MP4_TrackSetELST( demux_t *p_demux, mp4_track_t *tk,
- int64_t i_time )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- int i_elst_last = tk->i_elst;
- /* handle elst (find the correct one) */
- tk->i_elst = 0;
- tk->i_elst_time = 0;
- if( tk->p_elst && tk->p_elst->data.p_elst->i_entry_count > 0 )
- {
- MP4_Box_data_elst_t *elst = tk->p_elst->data.p_elst;
- int64_t i_mvt= i_time * p_sys->i_timescale / (int64_t)1000000;
- for( tk->i_elst = 0; tk->i_elst < elst->i_entry_count; tk->i_elst++ )
- {
- mtime_t i_dur = elst->i_segment_duration[tk->i_elst];
- if( tk->i_elst_time <= i_mvt && i_mvt < tk->i_elst_time + i_dur )
- {
- break;
- }
- tk->i_elst_time += i_dur;
- }
- if( tk->i_elst >= elst->i_entry_count )
- {
- /* msg_Dbg( p_demux, "invalid number of entry in elst" ); */
- tk->i_elst = elst->i_entry_count - 1;
- tk->i_elst_time -= elst->i_segment_duration[tk->i_elst];
- }
- if( elst->i_media_time[tk->i_elst] < 0 )
- {
- /* track offset */
- tk->i_elst_time += elst->i_segment_duration[tk->i_elst];
- }
- }
- if( i_elst_last != tk->i_elst )
- {
- msg_Warn( p_demux, "elst old=%d new=%d", i_elst_last, tk->i_elst );
- }
- }