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vlc/modules/demux/mp4/mp4.c

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/*****************************************************************************
* mp4.c : MP4 file input module for vlc
*****************************************************************************
* Copyright (C) 2001-2004, 2010 VLC authors and VideoLAN
*
* 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 Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "mp4.h"
#include <vlc_plugin.h>
#include <vlc_demux.h>
#include <vlc_charset.h> /* EnsureUTF8 */
#include <vlc_input.h>
#include <vlc_aout.h>
#include <assert.h>
#include <limits.h>
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close( vlc_object_t * );
vlc_module_begin ()
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_DEMUX )
set_description( N_("MP4 stream demuxer") )
set_shortname( N_("MP4") )
set_capability( "demux", 240 )
set_callbacks( Open, Close )
vlc_module_end ()
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Demux ( demux_t * );
static int DemuxRef( demux_t *p_demux ){ (void)p_demux; return 0;}
static int DemuxFrg( demux_t * );
static int DemuxAsLeaf( demux_t * );
static int Seek ( demux_t *, mtime_t );
static int Control ( demux_t *, int, va_list );
struct demux_sys_t
{
MP4_Box_t *p_root; /* container for the whole file */
mtime_t i_pcr;
uint64_t i_overall_duration; /* Full duration, including all fragments */
uint64_t i_time; /* time position of the presentation
* in movie timescale */
uint32_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 */
float f_fps; /* number of frame per seconds */
bool b_fragmented; /* fMP4 */
bool b_seekable;
bool b_fastseekable;
bool b_seekmode;
bool b_smooth; /* Is it Smooth Streaming? */
bool b_index_probed;
bool b_fragments_probed;
mp4_fragment_t moovfragment; /* moov */
mp4_fragment_t *p_fragments; /* known fragments (moof following moov) */
struct
{
mp4_fragment_t *p_fragment;
uint32_t i_current_box_type;
uint32_t i_mdatbytesleft;
} context;
/* */
MP4_Box_t *p_tref_chap;
/* */
input_title_t *p_title;
/* ASF in MP4 */
asf_packet_sys_t asfpacketsys;
uint64_t i_preroll; /* foobar */
int64_t i_preroll_start;
mp4_track_t *p_current_track; /* avoids matching stream_number */
};
/*****************************************************************************
* Declaration of local function
*****************************************************************************/
static void MP4_TrackCreate ( demux_t *, mp4_track_t *, MP4_Box_t *, bool b_force_enable );
static int MP4_frg_TrackCreate( demux_t *, mp4_track_t *, MP4_Box_t *);
static void MP4_TrackDestroy( mp4_track_t * );
static block_t * MP4_Block_Read( demux_t *, const mp4_track_t *, int );
static void MP4_Block_Send( demux_t *, mp4_track_t *, block_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 uint32_t MP4_TrackGetReadSize( mp4_track_t *, uint32_t * );
static int MP4_TrackNextSample( demux_t *, mp4_track_t *, uint32_t );
static void MP4_TrackSetELST( demux_t *, mp4_track_t *, int64_t );
static void MP4_UpdateSeekpoint( demux_t * );
static MP4_Box_t * MP4_GetTrexByTrackID( MP4_Box_t *p_moov, const uint32_t i_id );
static bool AddFragment( demux_t *p_demux, MP4_Box_t *p_moox );
static int ProbeFragments( demux_t *p_demux, bool b_force );
static int ProbeIndex( demux_t *p_demux );
static mp4_fragment_t *GetFragmentByPos( demux_t *p_demux, uint64_t i_pos, bool b_exact );
static mp4_fragment_t *GetFragmentByTime( demux_t *p_demux, const mtime_t i_time );
static int LeafIndexGetMoofPosByTime( demux_t *p_demux, const mtime_t i_target_time,
uint64_t *pi_pos, mtime_t *pi_mooftime );
static mtime_t LeafGetFragmentTimeOffset( demux_t *p_demux, mp4_fragment_t * );
static int LeafGetTrackAndChunkByMOOVPos( demux_t *p_demux, uint64_t *pi_pos,
mp4_track_t **pp_tk, unsigned int *pi_chunk );
static int LeafMapTrafTrunContextes( demux_t *p_demux, MP4_Box_t *p_moof );
/* ASF Handlers */
static asf_track_info_t * MP4ASF_GetTrackInfo( asf_packet_sys_t *p_packetsys, uint8_t i_stream_number );
static void MP4ASF_Send(asf_packet_sys_t *p_packetsys, uint8_t i_stream_number, block_t **pp_frame);
static void MP4ASF_ResetFrames( demux_sys_t *p_sys );
/* Helpers */
static uint32_t stream_ReadU32( stream_t *s, void *p_read, uint32_t i_toread )
{
uint32_t i_return = 0;
if ( i_toread > INT32_MAX )
{
i_return = stream_Read( s, p_read, INT32_MAX );
if ( i_return < INT32_MAX )
return i_return;
else
i_toread -= INT32_MAX;
}
i_return += stream_Read( s, (uint8_t *)p_read + i_return, (int32_t) i_toread );
return i_return;
}
static bool MP4_stream_Tell( stream_t *s, uint64_t *pi_pos )
{
int64_t i_pos = stream_Tell( s );
if ( i_pos < 0 )
return false;
else
{
*pi_pos = (uint64_t) i_pos;
return true;
}
}
static MP4_Box_t * MP4_GetTrexByTrackID( MP4_Box_t *p_moov, const uint32_t i_id )
{
MP4_Box_t *p_trex = MP4_BoxGet( p_moov, "mvex/trex" );
while( p_trex )
{
if ( p_trex->i_type == ATOM_trex &&
BOXDATA(p_trex) && BOXDATA(p_trex)->i_track_ID == i_id )
break;
else
p_trex = p_trex->p_next;
}
return p_trex;
}
static MP4_Box_t * MP4_GetTrakByTrackID( MP4_Box_t *p_moov, const uint32_t i_id )
{
MP4_Box_t *p_trak = MP4_BoxGet( p_moov, "trak" );
MP4_Box_t *p_tkhd;
while( p_trak )
{
if( p_trak->i_type == ATOM_trak &&
(p_tkhd = MP4_BoxGet( p_trak, "tkhd" )) && BOXDATA(p_tkhd) &&
BOXDATA(p_tkhd)->i_track_ID == i_id )
break;
else
p_trak = p_trak->p_next;
}
return p_trak;
}
/* Return time in microsecond of a track */
static inline int64_t MP4_TrackGetDTS( demux_t *p_demux, mp4_track_t *p_track )
{
demux_sys_t *p_sys = p_demux->p_sys;
mp4_chunk_t chunk;
if( p_sys->b_fragmented )
chunk = *p_track->cchunk;
else
chunk = p_track->chunk[p_track->i_chunk];
unsigned int i_index = 0;
unsigned int i_sample = p_track->i_sample - chunk.i_sample_first;
int64_t i_dts = chunk.i_first_dts;
while( i_sample > 0 )
{
if( i_sample > chunk.p_sample_count_dts[i_index] )
{
i_dts += chunk.p_sample_count_dts[i_index] *
chunk.p_sample_delta_dts[i_index];
i_sample -= chunk.p_sample_count_dts[i_index];
i_index++;
}
else
{
i_dts += i_sample * chunk.p_sample_delta_dts[i_index];
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->BOXDATA(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 CLOCK_FREQ * i_dts / p_track->i_timescale;
}
static inline int64_t MP4_TrackGetPTSDelta( demux_t *p_demux, mp4_track_t *p_track )
{
demux_sys_t *p_sys = p_demux->p_sys;
mp4_chunk_t *ck;
if( p_sys->b_fragmented )
ck = p_track->cchunk;
else
ck = &p_track->chunk[p_track->i_chunk];
unsigned int i_index = 0;
unsigned int i_sample = p_track->i_sample - ck->i_sample_first;
if( ck->p_sample_count_pts == NULL || ck->p_sample_offset_pts == NULL )
return -1;
for( i_index = 0;; i_index++ )
{
if( i_sample < ck->p_sample_count_pts[i_index] )
return ck->p_sample_offset_pts[i_index] * CLOCK_FREQ /
(int64_t)p_track->i_timescale;
i_sample -= ck->p_sample_count_pts[i_index];
}
}
static inline int64_t MP4_GetMoviePTS(demux_sys_t *p_sys )
{
return CLOCK_FREQ * p_sys->i_time / p_sys->i_timescale;
}
static void LoadChapter( demux_t *p_demux );
static int LoadInitFrag( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
if( p_sys->b_smooth ) /* Smooth Streaming */
{
if( ( p_sys->p_root = MP4_BoxGetSmooBox( p_demux->s ) ) == NULL )
{
goto LoadInitFragError;
}
else
{
MP4_Box_t *p_smoo = MP4_BoxGet( p_sys->p_root, "uuid" );
if( !p_smoo || CmpUUID( &p_smoo->i_uuid, &SmooBoxUUID ) )
goto LoadInitFragError;
/* Get number of tracks */
p_sys->i_tracks = 0;
for( int i = 0; i < 3; i++ )
{
MP4_Box_t *p_stra = MP4_BoxGet( p_smoo, "uuid[%d]", i );
if( p_stra && BOXDATA(p_stra) && BOXDATA(p_stra)->i_track_ID )
p_sys->i_tracks++;
/* Get timescale and duration of the video track; */
if( p_sys->i_timescale == 0 )
{
if ( p_stra && BOXDATA(p_stra) )
{
p_sys->i_timescale = BOXDATA(p_stra)->i_timescale;
p_sys->i_duration = BOXDATA(p_stra)->i_duration;
p_sys->i_overall_duration = BOXDATA(p_stra)->i_duration;
}
if( p_sys->i_timescale == 0 )
{
msg_Err( p_demux, "bad timescale" );
goto LoadInitFragError;
}
}
}
}
}
else
{
/* Load all boxes ( except raw data ) */
if( ( p_sys->p_root = MP4_BoxGetRoot( p_demux->s ) ) == NULL )
{
goto LoadInitFragError;
}
}
return VLC_SUCCESS;
LoadInitFragError:
msg_Warn( p_demux, "MP4 plugin discarded (not a valid initialization chunk)" );
return VLC_EGENERIC;
}
static int InitTracks( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
p_sys->track = calloc( p_sys->i_tracks, sizeof( mp4_track_t ) );
if( p_sys->track == NULL )
return VLC_EGENERIC;
if( p_sys->b_fragmented )
{
mp4_track_t *p_track;
for( uint16_t i = 0; i < p_sys->i_tracks; i++ )
{
p_track = &p_sys->track[i];
p_track->cchunk = calloc( 1, sizeof( mp4_chunk_t ) );
if( unlikely( !p_track->cchunk ) )
{
free( p_sys->track );
return VLC_EGENERIC;
}
}
}
return VLC_SUCCESS;
}
static void CreateTracksFromSmooBox( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
MP4_Box_t *p_smoo = MP4_BoxGet( p_sys->p_root, "uuid" );
mp4_track_t *p_track;
int j = 0;
for( int i = 0; i < 3; i++ )
{
MP4_Box_t *p_stra = MP4_BoxGet( p_smoo, "uuid[%d]", i );
if( !p_stra || !BOXDATA(p_stra) || BOXDATA(p_stra)->i_track_ID == 0 )
continue;
else
{
p_track = &p_sys->track[j]; j++;
MP4_frg_TrackCreate( p_demux, p_track, p_stra );
p_track->p_es = es_out_Add( p_demux->out, &p_track->fmt );
}
}
}
static block_t * MP4_EIA608_Convert( block_t * p_block )
{
/* Rebuild codec data from encap */
size_t i_copied = 0;
size_t i_remaining = p_block->i_buffer;
uint32_t i_bytes = 0;
block_t *p_newblock;
if ( i_remaining < 10 ||
!(i_bytes = GetDWBE(p_block->p_buffer)) ||
(i_bytes + 8 > i_remaining) ||
memcmp("cdat", &p_block->p_buffer[4], 4) ||
!(p_newblock = block_Alloc( i_remaining * 3 - 8 )) )
{
p_block->i_buffer = 0;
return p_block;
}
uint8_t *p_write = p_newblock->p_buffer;
uint8_t *p_read = &p_block->p_buffer[8];
i_bytes -= 8;
i_remaining -= 8;
do
{
p_write[i_copied++] = 0; /* cc1 == field 0 */
p_write[i_copied++] = p_read[0];
p_write[i_copied++] = p_read[1];
p_read += 2;
i_bytes -= 2;
i_remaining -= 2;
} while( i_bytes >= 2 );
if ( i_remaining >= 10 &&
(i_bytes = GetDWBE(p_read)) &&
(i_bytes + 8 <= i_remaining) &&
!memcmp("cdt2", &p_read[4], 4) )
{
p_read += 8;
i_bytes -= 8;
i_remaining -= 8;
do
{
p_write[i_copied++] = 0; /* cc1 == field 0 */
p_write[i_copied++] = p_read[0];
p_write[i_copied++] = p_read[1];
p_read += 2;
i_bytes -= 2;
} while( i_bytes >= 2 );
}
block_Release( p_block );
p_newblock->i_buffer = i_copied;
return p_newblock;
}
static block_t * MP4_Block_Read( demux_t *p_demux, const mp4_track_t *p_track, int i_size )
{
block_t *p_block = stream_Block( p_demux->s, i_size );
if ( !p_block )
return NULL;
/* might have some encap */
if( p_track->fmt.i_cat == SPU_ES )
{
switch( p_track->fmt.i_codec )
{
case VLC_CODEC_TX3G:
case VLC_CODEC_SPU:
/* accept as-is */
break;
case VLC_CODEC_EIA608_1:
p_block = MP4_EIA608_Convert( p_block );
break;
default:
p_block->i_buffer = 0;
break;
}
}
return p_block;
}
static void MP4_Block_Send( demux_t *p_demux, mp4_track_t *p_track, block_t *p_block )
{
if ( p_track->b_chans_reorder && aout_BitsPerSample( p_track->fmt.i_codec ) )
{
aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer,
p_track->fmt.audio.i_channels,
p_track->rgi_chans_reordering,
p_track->fmt.i_codec );
}
/* ASF packets in mov */
if( p_track->p_asf )
{
/* Fake a new stream from MP4 block */
stream_t *p_stream = p_demux->s;
p_demux->s = stream_MemoryNew( p_demux, p_block->p_buffer, p_block->i_buffer, true );
if ( p_demux->s )
{
p_track->i_dts_backup = p_block->i_dts;
p_track->i_pts_backup = p_block->i_pts;
/* And demux it as ASF packet */
DemuxASFPacket( &p_demux->p_sys->asfpacketsys, p_block->i_buffer, p_block->i_buffer );
stream_Delete(p_demux->s);
}
block_Release(p_block);
p_demux->s = p_stream;
}
else
es_out_Send( p_demux->out, p_track->p_es, p_block );
}
/*****************************************************************************
* 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;
const 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;
bool b_enabled_es;
/* A little test to see if it could be a mp4 */
if( stream_Peek( p_demux->s, &p_peek, 11 ) < 11 ) return VLC_EGENERIC;
switch( VLC_FOURCC( p_peek[4], p_peek[5], p_peek[6], p_peek[7] ) )
{
case ATOM_moov:
case ATOM_foov:
case ATOM_moof:
case ATOM_mdat:
case ATOM_udta:
case ATOM_free:
case ATOM_skip:
case ATOM_wide:
case ATOM_uuid:
case VLC_FOURCC( 'p', 'n', 'o', 't' ):
break;
case ATOM_ftyp:
/* We don't yet support f4v, but avformat does. */
if( p_peek[8] == 'f' && p_peek[9] == '4' && p_peek[10] == 'v' )
return VLC_EGENERIC;
break;
default:
return VLC_EGENERIC;
}
/* create our structure that will contains all data */
p_sys = calloc( 1, sizeof( demux_sys_t ) );
if ( !p_sys )
return VLC_EGENERIC;
/* I need to seek */
stream_Control( p_demux->s, STREAM_CAN_SEEK, &p_sys->b_seekable );
if( !p_sys->b_seekable )
{
msg_Warn( p_demux, "MP4 plugin discarded (not seekable)" );
free( p_sys );
return VLC_EGENERIC;
}
stream_Control( p_demux->s, STREAM_CAN_FASTSEEK, &p_sys->b_fastseekable );
p_sys->b_seekmode = p_sys->b_fastseekable;
/*Set exported functions */
p_demux->pf_demux = Demux;
p_demux->pf_control = Control;
p_demux->p_sys = p_sys;
if( stream_Peek( p_demux->s, &p_peek, 24 ) < 24 ) return VLC_EGENERIC;
if( !CmpUUID( (UUID_t *)(p_peek + 8), &SmooBoxUUID ) )
{
p_sys->b_smooth = true;
p_sys->b_fragmented = true;
}
if( LoadInitFrag( p_demux ) != VLC_SUCCESS )
goto error;
if( MP4_BoxCount( p_sys->p_root, "/moov/mvex" ) > 0 )
{
if ( p_sys->b_seekable )
{
/* Probe remaining to check if there's really fragments
or if that file is just ready to append fragments */
ProbeFragments( p_demux, false );
p_sys->b_fragmented = !!MP4_BoxCount( p_sys->p_root, "/moof" );
}
else
p_sys->b_fragmented = true;
if ( p_sys->b_fragmented && !p_sys->i_overall_duration )
ProbeFragments( p_demux, true );
}
if ( !p_sys->moovfragment.p_moox )
AddFragment( p_demux, MP4_BoxGet( p_sys->p_root, "/moov" ) );
/* we always need a moov entry, but smooth has a workaround */
if ( !p_sys->moovfragment.p_moox && !p_sys->b_smooth )
goto error;
if ( p_sys->b_smooth )
{
p_demux->pf_demux = DemuxFrg;
}
else if( p_sys->b_fragmented )
{
p_demux->pf_demux = DemuxAsLeaf;
}
if( p_sys->b_smooth )
{
if( InitTracks( p_demux ) != VLC_SUCCESS )
goto error;
CreateTracksFromSmooBox( p_demux );
return VLC_SUCCESS;
}
MP4_BoxDumpStructure( p_demux->s, p_sys->p_root );
if( ( p_ftyp = MP4_BoxGet( p_sys->p_root, "/ftyp" ) ) )
{
switch( BOXDATA(p_ftyp)->i_major_brand )
{
case MAJOR_isom:
msg_Dbg( p_demux,
"ISO Media file (isom) version %d.",
BOXDATA(p_ftyp)->i_minor_version );
break;
case MAJOR_3gp4:
case MAJOR_3gp5:
case MAJOR_3gp6:
case MAJOR_3gp7:
msg_Dbg( p_demux, "3GPP Media file Release: %c",
#ifdef WORDS_BIGENDIAN
BOXDATA(p_ftyp)->i_major_brand
#else
BOXDATA(p_ftyp)->i_major_brand >> 24
#endif
);
break;
case MAJOR_qt__:
msg_Dbg( p_demux, "Apple QuickTime file" );
break;
case MAJOR_isml:
msg_Dbg( p_demux, "PIFF (= isml = fMP4) file" );
break;
default:
msg_Dbg( p_demux,
"unrecognized major file specification (%4.4s).",
(char*)&BOXDATA(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 */
p_sys->moovfragment.p_moox = MP4_BoxGet( p_sys->p_root, "/moov", 0 );
if( !p_sys->moovfragment.p_moox )
{
MP4_Box_t *p_foov = MP4_BoxGet( p_sys->p_root, "/foov" );
if( !p_foov )
{
msg_Err( p_demux, "MP4 plugin discarded (no moov,foov,moof box)" );
goto error;
}
/* we have a free box as a moov, rename it */
p_foov->i_type = ATOM_moov;
p_sys->moovfragment.p_moox = p_foov;
}
if( ( p_rmra = MP4_BoxGet( p_sys->p_root, "/moov/rmra" ) ) )
{
int i_count = MP4_BoxCount( p_rmra, "rmda" );
int i;
msg_Dbg( p_demux, "detected playlist mov file (%d ref)", i_count );
input_thread_t *p_input = demux_GetParentInput( p_demux );
input_item_t *p_current = input_GetItem( p_input );
input_item_node_t *p_subitems = input_item_node_Create( p_current );
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 || !BOXDATA(p_rdrf) || !( psz_ref = strdup( BOXDATA(p_rdrf)->psz_ref ) ) )
{
continue;
}
i_ref_type = BOXDATA(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 ) )
{
;
}
else
{
char *psz_absolute;
char *psz_path = strdup( p_demux->psz_location );
char *end = strrchr( psz_path, '/' );
if( end ) end[1] = '\0';
else *psz_path = '\0';
if( asprintf( &psz_absolute, "%s://%s%s",
p_demux->psz_access, psz_path, psz_ref ) < 0 )
{
free( psz_ref );
free( psz_path );
input_item_node_Delete( p_subitems );
vlc_object_release( p_input) ;
return VLC_ENOMEM;
}
free( psz_ref );
psz_ref = psz_absolute;
free( psz_path );
}
msg_Dbg( p_demux, "adding ref = `%s'", psz_ref );
input_item_t *p_item = input_item_New( psz_ref, NULL );
input_item_CopyOptions( p_current, p_item );
input_item_node_AppendItem( p_subitems, p_item );
vlc_gc_decref( p_item );
}
else
{
msg_Err( p_demux, "unknown ref type=%4.4s FIXME (send a bug report)",
(char*)&BOXDATA(p_rdrf)->i_ref_type );
}
free( psz_ref );
}
input_item_node_PostAndDelete( p_subitems );
vlc_object_release( p_input );
}
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 = BOXDATA(p_mvhd)->i_timescale;
if( p_sys->i_timescale == 0 )
{
msg_Err( p_this, "bad timescale" );
goto error;
}
}
if ( p_sys->i_overall_duration == 0 )
{
/* Try in mehd if fragmented */
MP4_Box_t *p_mehd = MP4_BoxGet( p_demux->p_sys->p_root, "moov/mvex/mehd");
if ( p_mehd && p_mehd->data.p_mehd )
p_sys->i_overall_duration = p_mehd->data.p_mehd->i_fragment_duration;
else
p_sys->i_overall_duration = p_sys->moovfragment.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, "found %d track%c",
p_sys->i_tracks,
p_sys->i_tracks ? 's':' ' );
if( InitTracks( p_demux ) != VLC_SUCCESS )
goto error;
/* Search the first chap reference (like quicktime) and
* check that at least 1 stream is enabled */
p_sys->p_tref_chap = NULL;
b_enabled_es = false;
for( i = 0; i < p_sys->i_tracks; i++ )
{
MP4_Box_t *p_trak = MP4_BoxGet( p_sys->p_root, "/moov/trak[%d]", i );
MP4_Box_t *p_tkhd = MP4_BoxGet( p_trak, "tkhd" );
if( p_tkhd && BOXDATA(p_tkhd) && (BOXDATA(p_tkhd)->i_flags&MP4_TRACK_ENABLED) )
b_enabled_es = true;
MP4_Box_t *p_chap = MP4_BoxGet( p_trak, "tref/chap", i );
if( p_chap && p_chap->data.p_tref_generic &&
p_chap->data.p_tref_generic->i_entry_count > 0 && !p_sys->p_tref_chap )
p_sys->p_tref_chap = p_chap;
}
/* now process each track and extract all useful 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, !b_enabled_es );
if( p_sys->track[i].b_ok && !p_sys->track[i].b_chapter )
{
const 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 if( p_sys->track[i].b_ok && p_sys->track[i].b_chapter )
{
msg_Dbg( p_demux, "using track[Id 0x%x] for chapter language %s",
p_sys->track[i].i_track_ID,
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 );
}
}
mp4_fragment_t *p_fragment = &p_sys->moovfragment;
while ( p_fragment )
{
msg_Dbg( p_demux, "fragment offset %"PRId64", data %"PRIu64"<->%"PRIu64", duration %"PRId64,
p_fragment->p_moox->i_pos, p_fragment->i_chunk_range_min_offset,
p_fragment->i_chunk_range_max_offset, CLOCK_FREQ * p_fragment->i_duration / p_sys->i_timescale );
p_fragment = p_fragment->p_next;
}
/* */
LoadChapter( p_demux );
p_sys->asfpacketsys.p_demux = p_demux;
p_sys->asfpacketsys.pi_preroll = &p_sys->i_preroll;
p_sys->asfpacketsys.pi_preroll_start = &p_sys->i_preroll_start;
p_sys->asfpacketsys.pf_doskip = NULL;
p_sys->asfpacketsys.pf_send = MP4ASF_Send;
p_sys->asfpacketsys.pf_gettrackinfo = MP4ASF_GetTrackInfo;
p_sys->asfpacketsys.pf_updatetime = NULL;
p_sys->asfpacketsys.pf_setaspectratio = NULL;
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];
bool b;
if( !tk->b_ok || tk->b_chapter ||
( tk->b_selected && tk->i_sample >= tk->i_sample_count ) )
{
continue;
}
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 = CLOCK_FREQ *
(mtime_t)p_sys->moovfragment.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;
}
/* */
MP4_UpdateSeekpoint( p_demux );
/* first wait for the good time to read a packet */
p_sys->i_pcr = MP4_GetMoviePTS( p_sys );
bool b_data_sent = false;
/* Find next track matching contiguous data */
mp4_track_t *tk = NULL;
uint64_t i_candidate_pos = UINT64_MAX;
mtime_t i_candidate_dts = INT64_MAX;
for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
{
mp4_track_t *tk_tmp = &p_sys->track[i_track];
if( !tk_tmp->b_ok || tk_tmp->b_chapter || !tk_tmp->b_selected || tk_tmp->i_sample >= tk_tmp->i_sample_count )
continue;
if ( p_sys->b_seekmode )
{
mtime_t i_dts = MP4_TrackGetDTS( p_demux, tk_tmp );
if ( i_dts <= i_candidate_dts )
{
tk = tk_tmp;
i_candidate_dts = i_dts;
i_candidate_pos = MP4_TrackGetPos( tk_tmp );
}
}
else
{
/* Try to avoid seeking on non fastseekable. Will fail with non interleaved content */
uint64_t i_pos = MP4_TrackGetPos( tk_tmp );
if ( i_pos <= i_candidate_pos )
{
i_candidate_pos = i_pos;
tk = tk_tmp;
}
}
}
if ( !tk )
{
msg_Dbg( p_demux, "Could not select track by data position" );
goto end;
}
else if ( p_sys->b_seekmode )
{
if( stream_Seek( p_demux->s, i_candidate_pos ) )
{
msg_Warn( p_demux, "track[0x%x] will be disabled (eof?)",
tk->i_track_ID );
MP4_TrackUnselect( p_demux, tk );
goto end;
}
}
#if 0
msg_Dbg( p_demux, "tk(%i)=%"PRId64" mv=%"PRId64" pos=%"PRIu64, i_track,
MP4_TrackGetDTS( p_demux, tk ),
MP4_GetMoviePTS( p_sys ), i_candidate_pos );
#endif
uint32_t i_nb_samples = 0;
uint32_t i_samplessize = MP4_TrackGetReadSize( tk, &i_nb_samples );
if( i_samplessize > 0 )
{
block_t *p_block;
int64_t i_delta;
uint64_t i_current_pos;
/* go,go go ! */
if ( !MP4_stream_Tell( p_demux->s, &i_current_pos ) )
goto end;
if( i_current_pos != i_candidate_pos )
{
if( stream_Seek( p_demux->s, i_candidate_pos ) )
{
msg_Warn( p_demux, "track[0x%x] will be disabled (eof?)"
": Failed to seek to %"PRIu64,
tk->i_track_ID, i_candidate_pos );
MP4_TrackUnselect( p_demux, tk );
goto end;
}
i_current_pos = i_candidate_pos;
}
/* now read pes */
if( !(p_block = MP4_Block_Read( p_demux, tk, i_samplessize )) )
{
msg_Warn( p_demux, "track[0x%x] will be disabled (eof?)"
": Failed to read %d bytes sample at %"PRIu64,
tk->i_track_ID, i_samplessize, i_current_pos );
MP4_TrackUnselect( p_demux, tk );
goto end;
}
/* dts */
p_block->i_dts = VLC_TS_0 + MP4_TrackGetDTS( p_demux, tk );
/* pts */
i_delta = MP4_TrackGetPTSDelta( p_demux, tk );
if( i_delta != -1 )
p_block->i_pts = p_block->i_dts + i_delta;
else if( tk->fmt.i_cat != VIDEO_ES )
p_block->i_pts = p_block->i_dts;
else
p_block->i_pts = VLC_TS_INVALID;
if ( !b_data_sent )
{
es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + p_sys->i_pcr );
b_data_sent = true;
}
MP4_Block_Send( p_demux, tk, p_block );
}
/* Next sample */
if ( i_nb_samples ) /* sample size could be 0, need to go fwd. see return */
MP4_TrackNextSample( p_demux, tk, i_nb_samples );
end:
if ( b_data_sent )
{
p_sys->i_pcr = INT64_MAX;
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 ||
(tk->fmt.i_cat != AUDIO_ES && tk->fmt.i_cat != VIDEO_ES) )
continue;
mtime_t i_dts = MP4_TrackGetDTS( p_demux, tk );
p_sys->i_pcr = __MIN( i_dts, p_sys->i_pcr );
if ( !p_sys->b_seekmode && i_dts > p_sys->i_pcr + 2*CLOCK_FREQ )
{
msg_Dbg( p_demux, "that media doesn't look interleaved, will need to seek");
p_sys->b_seekmode = true;
}
p_sys->i_time = p_sys->i_pcr * p_sys->i_timescale / CLOCK_FREQ;
}
}
return b_data_sent || ( i_samplessize == 0 && i_nb_samples );
}
static void MP4_UpdateSeekpoint( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
int64_t i_time;
int i;
if( !p_sys->p_title )
return;
i_time = MP4_GetMoviePTS( p_sys );
for( i = 0; i < p_sys->p_title->i_seekpoint; i++ )
{
if( i_time < p_sys->p_title->seekpoint[i]->i_time_offset )
break;
}
i--;
if( i != p_demux->info.i_seekpoint && i >= 0 )
{
p_demux->info.i_seekpoint = i;
p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
}
}
/*****************************************************************************
* Seek: Go 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 global time */
p_sys->i_time = i_date * p_sys->i_timescale / CLOCK_FREQ;
p_sys->i_pcr = VLC_TS_INVALID;
/* 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 );
}
MP4_UpdateSeekpoint( p_demux );
MP4ASF_ResetFrames( p_sys );
es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, i_date );
return VLC_SUCCESS;
}
static int LeafSeekIntoFragment( demux_t *p_demux, mp4_fragment_t *p_fragment )
{
demux_sys_t *p_sys = p_demux->p_sys;
uint64_t i64 = p_fragment->i_chunk_range_min_offset;
if ( p_fragment->p_moox->i_type == ATOM_moov )
{
mp4_track_t *p_track;
unsigned int i_chunk;
int i_ret = LeafGetTrackAndChunkByMOOVPos( p_demux, &i64, &p_track, &i_chunk );
if ( i_ret == VLC_EGENERIC )
{
msg_Dbg( p_demux, "moov seek failed to identify %"PRIu64, i64 );
return i_ret;
}
msg_Dbg( p_demux, "moov seeking to %"PRIu64, i64 );
}
else
{
i64 = p_fragment->i_chunk_range_min_offset;
msg_Dbg( p_demux, "moof seeking to %"PRIu64, i64 );
}
if( stream_Seek( p_demux->s, i64 ) )
{
msg_Err( p_demux, "seek failed to %"PRIu64, i64 );
return VLC_EGENERIC;
}
/* map context */
p_sys->context.p_fragment = p_fragment;
p_sys->context.i_current_box_type = ATOM_mdat;
LeafMapTrafTrunContextes( p_demux, p_fragment->p_moox );
p_sys->context.i_mdatbytesleft = p_fragment->i_chunk_range_max_offset - i64;
mtime_t i_time_base = LeafGetFragmentTimeOffset( p_demux, p_fragment );
for( unsigned int i_track = 0; i_track < p_sys->i_tracks; i_track++ )
{
p_sys->track[i_track].i_time = i_time_base * p_sys->track[i_track].i_timescale / p_sys->i_timescale;
}
p_sys->i_time = i_time_base;
p_sys->i_pcr = VLC_TS_INVALID;
return VLC_SUCCESS;
}
static int LeafSeekToTime( demux_t *p_demux, mtime_t i_nztime )
{
demux_sys_t *p_sys = p_demux->p_sys;
mp4_fragment_t *p_fragment;
uint64_t i64 = 0;
if ( !p_sys->i_timescale || !p_sys->i_overall_duration || !p_sys->b_seekable )
return VLC_EGENERIC;
if ( !p_sys->b_fragments_probed && !p_sys->b_index_probed && p_sys->b_seekable )
{
ProbeIndex( p_demux );
p_sys->b_index_probed = true;
}
p_fragment = GetFragmentByTime( p_demux, i_nztime );
if ( !p_fragment )
{
mtime_t i_mooftime;
msg_Dbg( p_demux, "seek can't find matching fragment for %"PRId64", trying index", i_nztime );
if ( LeafIndexGetMoofPosByTime( p_demux, i_nztime, &i64, &i_mooftime ) == VLC_SUCCESS )
{
msg_Dbg( p_demux, "seek trying to go to unknown but indexed fragment at %"PRId64, i64 );
if( stream_Seek( p_demux->s, i64 ) )
{
msg_Err( p_demux, "seek to moof failed %"PRId64, i64 );
return VLC_EGENERIC;
}
p_sys->context.i_current_box_type = 0;
p_sys->context.i_mdatbytesleft = 0;
p_sys->context.p_fragment = NULL;
for( unsigned int i_track = 0; i_track < p_sys->i_tracks; i_track++ )
{
p_sys->track[i_track].i_time = i_mooftime / CLOCK_FREQ * p_sys->track[i_track].i_timescale;
}
p_sys->i_time = i_mooftime / CLOCK_FREQ * p_sys->i_timescale;
p_sys->i_pcr = VLC_TS_INVALID;
}
else
{
msg_Warn( p_demux, "seek by index failed" );
return VLC_EGENERIC;
}
}
else
{
msg_Dbg( p_demux, "seeking to fragment data starting at %"PRIu64" for time %"PRId64,
p_fragment->i_chunk_range_min_offset, i_nztime );
if ( LeafSeekIntoFragment( p_demux, p_fragment ) != VLC_SUCCESS )
return VLC_EGENERIC;
}
MP4ASF_ResetFrames( p_sys );
/* And set next display time in that trun/fragment */
es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, VLC_TS_0 + i_nztime );
return VLC_SUCCESS;
}
static int LeafSeekToPos( demux_t *p_demux, double f )
{
demux_sys_t *p_sys = p_demux->p_sys;
if ( !p_sys->b_seekable )
return VLC_EGENERIC;
if ( p_sys->i_timescale && p_sys->i_overall_duration )
{
return LeafSeekToTime( p_demux,
(mtime_t)( f * CLOCK_FREQ * p_sys->i_overall_duration /
p_sys->i_timescale ) );
}
if ( !p_sys->b_fragments_probed && !p_sys->b_index_probed && p_sys->b_seekable )
{
ProbeIndex( p_demux );
p_sys->b_index_probed = true;
}
/* Blind seek to pos only */
uint64_t i64 = (uint64_t) stream_Size( p_demux->s ) * f;
mp4_fragment_t *p_fragment = GetFragmentByPos( p_demux, i64, false );
if ( p_fragment )
{
msg_Dbg( p_demux, "Seeking to fragment data starting at %"PRIu64" for pos %"PRIu64,
p_fragment->i_chunk_range_min_offset, i64 );
return LeafSeekIntoFragment( p_demux, p_fragment );
}
else
{
msg_Dbg( p_demux, "Cant get fragment for data starting at %"PRIu64, i64 );
return VLC_EGENERIC;
}
}
static int MP4_frg_Seek( demux_t *p_demux, double f )
{
demux_sys_t *p_sys = p_demux->p_sys;
int64_t i64 = stream_Size( p_demux->s );
if( stream_Seek( p_demux->s, (int64_t)(i64 * f) ) )
{
return VLC_EGENERIC;
}
else
{
/* update global time */
p_sys->i_time = (uint64_t)(f * (double)p_sys->moovfragment.i_duration);
p_sys->i_pcr = MP4_GetMoviePTS( p_sys );
for( unsigned i_track = 0; i_track < p_sys->i_tracks; i_track++ )
{
mp4_track_t *tk = &p_sys->track[i_track];
/* We don't want the current chunk to be flushed */
tk->cchunk->i_sample = tk->cchunk->i_sample_count;
/* reset/update some values */
tk->i_sample = tk->i_sample_first = 0;
tk->i_first_dts = p_sys->i_time;
/* We want to discard the current chunk and get the next one at once */
tk->b_has_non_empty_cchunk = false;
}
es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, p_sys->i_pcr );
return VLC_SUCCESS;
}
}
static bool imageTypeCompatible( const MP4_Box_data_data_t *p_data )
{
return p_data && (
p_data->e_wellknowntype == DATA_WKT_PNG ||
p_data->e_wellknowntype == DATA_WKT_JPEG ||
p_data->e_wellknowntype == DATA_WKT_BMP );
}
/*****************************************************************************
* 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;
const char *psz_roots[] = { "/moov/udta/meta/ilst",
"/moov/meta/ilst",
"/moov/udta/meta",
"/moov/udta",
"/meta/ilst",
"/udta",
NULL };
const uint32_t rgi_pict_atoms[2] = { ATOM_PICT, ATOM_pict };
switch( i_query )
{
case DEMUX_GET_POSITION:
pf = (double*)va_arg( args, double * );
if( p_sys->i_overall_duration > 0 )
{
*pf = (double)p_sys->i_time / (double)p_sys->i_overall_duration;
}
else
{
*pf = 0.0;
}
return VLC_SUCCESS;
case DEMUX_SET_POSITION:
f = (double)va_arg( args, double );
if ( p_demux->pf_demux == DemuxAsLeaf )
return LeafSeekToPos( p_demux, f );
else if ( p_demux->pf_demux == DemuxFrg )
return MP4_frg_Seek( p_demux, f );
else if( p_sys->i_timescale > 0 )
{
i64 = (int64_t)( f * CLOCK_FREQ *
(double)p_sys->i_overall_duration /
(double)p_sys->i_timescale );
return Seek( p_demux, i64 );
}
else return VLC_EGENERIC;
case DEMUX_GET_TIME:
pi64 = (int64_t*)va_arg( args, int64_t * );
if( p_sys->i_timescale > 0 )
{
*pi64 = CLOCK_FREQ *
(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 );
if ( p_demux->pf_demux == DemuxAsLeaf )
return LeafSeekToTime( p_demux, i64 );
else
return Seek( p_demux, i64 );
case DEMUX_GET_LENGTH:
pi64 = (int64_t*)va_arg( args, int64_t * );
if( p_sys->i_timescale > 0 )
{
*pi64 = CLOCK_FREQ *
(mtime_t)p_sys->i_overall_duration /
(mtime_t)p_sys->i_timescale;
}
else *pi64 = 0;
return VLC_SUCCESS;
case DEMUX_GET_FPS:
pf = (double*)va_arg( args, double* );
*pf = p_sys->f_fps;
return VLC_SUCCESS;
case DEMUX_GET_ATTACHMENTS:
{
input_attachment_t ***ppp_attach = va_arg( args, input_attachment_t*** );
int *pi_int = va_arg( args, int * );
MP4_Box_t *p_udta = NULL;
size_t i_count = 0;
int i_index = 0;
/* Count number of total attachments */
for( ; psz_roots[i_index] && !p_udta; i_index++ )
{
p_udta = MP4_BoxGet( p_sys->p_root, psz_roots[i_index] );
if ( p_udta )
i_count += MP4_BoxCount( p_udta, "covr/data" );
}
for ( size_t i=0; i< ARRAY_SIZE(rgi_pict_atoms); i++ )
{
char rgsz_path[5];
snprintf( rgsz_path, 5, "%4.4s", (char*)&rgi_pict_atoms[i] );
i_count += MP4_BoxCount( p_sys->p_root, rgsz_path );
}
if ( i_count == 0 )
return VLC_EGENERIC;
*ppp_attach = (input_attachment_t**)
malloc( sizeof(input_attachment_t*) * i_count );
if( !(*ppp_attach) ) return VLC_ENOMEM;
/* First add cover attachments */
i_count = 0;
size_t i_box_count = 0;
if ( p_udta )
{
const MP4_Box_t *p_data = MP4_BoxGet( p_udta, "covr/data" );
for( ; p_data; p_data = p_data->p_next )
{
char *psz_mime;
char *psz_filename;
i_box_count++;
if ( p_data->i_type != ATOM_data || !imageTypeCompatible( BOXDATA(p_data) ) )
continue;
switch( BOXDATA(p_data)->e_wellknowntype )
{
case DATA_WKT_PNG:
psz_mime = strdup( "image/png" );
break;
case DATA_WKT_JPEG:
psz_mime = strdup( "image/jpeg" );
break;
case DATA_WKT_BMP:
psz_mime = strdup( "image/bmp" );
break;
default:
continue;
}
if ( asprintf( &psz_filename, "%s/covr/data[%"PRIu64"]", psz_roots[i_index - 1],
i_box_count - 1 ) >= 0 )
{
(*ppp_attach)[i_count++] =
vlc_input_attachment_New( psz_filename, psz_mime, "Cover picture",
BOXDATA(p_data)->p_blob, BOXDATA(p_data)->i_blob );
msg_Dbg( p_demux, "adding attachment %s", psz_filename );
free( psz_filename );
}
free( psz_mime );
}
}
/* Then quickdraw pict ones */
for ( size_t i=0; i< ARRAY_SIZE(rgi_pict_atoms); i++ )
{
char rgsz_path[5];
snprintf( rgsz_path, 5, "%4.4s", (char*)&rgi_pict_atoms[i] );
const MP4_Box_t *p_pict = MP4_BoxGet( p_sys->p_root, rgsz_path );
i_box_count = 0;
for( ; p_pict; p_pict = p_pict->p_next )
{
if ( i_box_count++ == UINT16_MAX ) /* pnot only handles 2^16 */
break;
if ( p_pict->i_type != rgi_pict_atoms[i] )
continue;
char rgsz_location[12];
snprintf( rgsz_location, 12, "%4.4s[%"PRIu16"]", (char*)&rgi_pict_atoms[i],
(uint16_t) i_box_count - 1 );
(*ppp_attach)[i_count++] = vlc_input_attachment_New( rgsz_location, "image/x-pict",
"Quickdraw image", p_pict->data.p_binary->p_blob, p_pict->data.p_binary->i_blob );
msg_Dbg( p_demux, "adding attachment %s", rgsz_location );
}
}
if ( i_count == 0 )
{
free( *ppp_attach );
return VLC_EGENERIC;
}
*pi_int = i_count;
return VLC_SUCCESS;
}
case DEMUX_GET_META:
{
vlc_meta_t *p_meta = (vlc_meta_t *)va_arg( args, vlc_meta_t*);
MP4_Box_t *p_data = NULL;
MP4_Box_t *p_udta = NULL;
bool b_attachment_set = false;
for( int i_index = 0; psz_roots[i_index] && !p_udta; i_index++ )
{
p_udta = MP4_BoxGet( p_sys->p_root, psz_roots[i_index] );
if ( p_udta )
{
p_data = MP4_BoxGet( p_udta, "covr/data" );
if ( p_data && imageTypeCompatible( BOXDATA(p_data) ) )
{
char *psz_attachment;
if ( -1 != asprintf( &psz_attachment, "attachment://%s/covr/data[0]",
psz_roots[i_index] ) )
{
vlc_meta_SetArtURL( p_meta, psz_attachment );
b_attachment_set = true;
free( psz_attachment );
}
}
}
}
const MP4_Box_t *p_pnot;
if ( !b_attachment_set && (p_pnot = MP4_BoxGet( p_sys->p_root, "pnot" )) )
{
for ( size_t i=0; i< ARRAY_SIZE(rgi_pict_atoms) && !b_attachment_set; i++ )
{
if ( rgi_pict_atoms[i] == BOXDATA(p_pnot)->i_type )
{
char rgsz_path[26];
snprintf( rgsz_path, 26, "attachment://%4.4s[%"PRIu16"]",
(char*)&rgi_pict_atoms[i], BOXDATA(p_pnot)->i_index - 1 );
vlc_meta_SetArtURL( p_meta, rgsz_path );
b_attachment_set = true;
}
}
}
if( p_udta == NULL && !b_attachment_set )
return VLC_EGENERIC;
SetupMeta( p_meta, p_udta );
return VLC_SUCCESS;
}
case DEMUX_GET_TITLE_INFO:
{
input_title_t ***ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
int *pi_int = (int*)va_arg( args, int* );
int *pi_title_offset = (int*)va_arg( args, int* );
int *pi_seekpoint_offset = (int*)va_arg( args, int* );
if( !p_sys->p_title )
return VLC_EGENERIC;
*pi_int = 1;
*ppp_title = malloc( sizeof( input_title_t*) );
(*ppp_title)[0] = vlc_input_title_Duplicate( p_sys->p_title );
*pi_title_offset = 0;
*pi_seekpoint_offset = 0;
return VLC_SUCCESS;
}
case DEMUX_SET_TITLE:
{
const int i_title = (int)va_arg( args, int );
if( !p_sys->p_title || i_title != 0 )
return VLC_EGENERIC;
return VLC_SUCCESS;
}
case DEMUX_SET_SEEKPOINT:
{
const int i_seekpoint = (int)va_arg( args, int );
if( !p_sys->p_title )
return VLC_EGENERIC;
return Seek( p_demux, p_sys->p_title->seekpoint[i_seekpoint]->i_time_offset );
}
case DEMUX_GET_PTS_DELAY:
{
for( unsigned int i = 0; i < p_sys->i_tracks; i++ )
{
const MP4_Box_t *p_load;
if ( (p_load = MP4_BoxGet( p_sys->track[i].p_track, "load" )) &&
BOXDATA(p_load)->i_duration > 0 )
{
*va_arg(args, int64_t *) = BOXDATA(p_load)->i_duration *
CLOCK_FREQ / p_sys->track[i].i_timescale;
return VLC_SUCCESS;
}
}
return VLC_EGENERIC;
}
case DEMUX_SET_NEXT_DEMUX_TIME:
case DEMUX_SET_GROUP:
case DEMUX_HAS_UNSUPPORTED_META:
case DEMUX_CAN_RECORD:
return VLC_EGENERIC;
default:
msg_Warn( p_demux, "control query %u unimplemented", i_query );
return VLC_EGENERIC;
}
}
/*****************************************************************************
* Close: frees unused data
*****************************************************************************/
static void Close ( vlc_object_t * p_this )
{
demux_t * p_demux = (demux_t *)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
unsigned int i_track;
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_sys->track[i_track] );
}
FREENULL( p_sys->track );
if( p_sys->p_title )
vlc_input_title_Delete( p_sys->p_title );
while( p_sys->moovfragment.p_next )
{
mp4_fragment_t *p_fragment = p_sys->moovfragment.p_next->p_next;
free( p_sys->moovfragment.p_next );
p_sys->moovfragment.p_next = p_fragment;
}
free( p_sys );
}
/****************************************************************************
* Local functions, specific to vlc
****************************************************************************/
/* Chapters */
static void LoadChapterGpac( demux_t *p_demux, MP4_Box_t *p_chpl )
{
demux_sys_t *p_sys = p_demux->p_sys;
int i;
p_sys->p_title = vlc_input_title_New();
for( i = 0; i < BOXDATA(p_chpl)->i_chapter; i++ )
{
seekpoint_t *s = vlc_seekpoint_New();
s->psz_name = strdup( BOXDATA(p_chpl)->chapter[i].psz_name );
EnsureUTF8( s->psz_name );
s->i_time_offset = BOXDATA(p_chpl)->chapter[i].i_start / 10;
TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s );
}
}
static void LoadChapterApple( demux_t *p_demux, mp4_track_t *tk )
{
demux_sys_t *p_sys = p_demux->p_sys;
for( tk->i_sample = 0; tk->i_sample < tk->i_sample_count; tk->i_sample++ )
{
const int64_t i_dts = MP4_TrackGetDTS( p_demux, tk );
const int64_t i_pts_delta = MP4_TrackGetPTSDelta( p_demux, tk );
uint32_t i_nb_samples = 0;
const uint32_t i_size = MP4_TrackGetReadSize( tk, &i_nb_samples );
if( i_size > 0 && !stream_Seek( p_demux->s, MP4_TrackGetPos( tk ) ) )
{
char p_buffer[256];
const uint32_t i_read = stream_ReadU32( p_demux->s, p_buffer,
__MIN( sizeof(p_buffer), i_size ) );
const uint32_t i_len = __MIN( GetWBE(p_buffer), i_read-2 );
if( i_len > 0 )
{
seekpoint_t *s = vlc_seekpoint_New();
s->psz_name = strndup( &p_buffer[2], i_len );
EnsureUTF8( s->psz_name );
s->i_time_offset = i_dts + __MAX( i_pts_delta, 0 );
if( !p_sys->p_title )
p_sys->p_title = vlc_input_title_New();
TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s );
}
}
if( tk->i_sample+1 >= tk->chunk[tk->i_chunk].i_sample_first +
tk->chunk[tk->i_chunk].i_sample_count )
tk->i_chunk++;
}
}
static void LoadChapter( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
MP4_Box_t *p_chpl;
if( ( p_chpl = MP4_BoxGet( p_sys->p_root, "/moov/udta/chpl" ) ) &&
BOXDATA(p_chpl) && BOXDATA(p_chpl)->i_chapter > 0 )
{
LoadChapterGpac( p_demux, p_chpl );
}
else if( p_sys->p_tref_chap )
{
MP4_Box_data_tref_generic_t *p_chap = p_sys->p_tref_chap->data.p_tref_generic;
unsigned int i, j;
/* Load the first subtitle track like quicktime */
for( i = 0; i < p_chap->i_entry_count; i++ )
{
for( j = 0; j < p_sys->i_tracks; j++ )
{
mp4_track_t *tk = &p_sys->track[j];
if( tk->b_ok && tk->i_track_ID == p_chap->i_track_ID[i] &&
tk->fmt.i_cat == SPU_ES && tk->fmt.i_codec == VLC_CODEC_SUBT )
break;
}
if( j < p_sys->i_tracks )
{
LoadChapterApple( p_demux, &p_sys->track[j] );
break;
}
}
}
/* Add duration if titles are enabled */
if( p_sys->p_title )
{
p_sys->p_title->i_length = CLOCK_FREQ *
(uint64_t)p_sys->i_overall_duration / (uint64_t)p_sys->i_timescale;
}
}
/* 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 )
{
demux_sys_t *p_sys = p_demux->p_sys;
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 = BOXDATA(p_co64)->i_entry_count;
if( !p_demux_track->i_chunk_count )
{
msg_Warn( p_demux, "no chunk defined" );
}
p_demux_track->chunk = calloc( p_demux_track->i_chunk_count,
sizeof( mp4_chunk_t ) );
if( p_demux_track->chunk == NULL )
{
return VLC_ENOMEM;
}
/* first we read chunk offset */
for( i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
{
mp4_chunk_t *ck = &p_demux_track->chunk[i_chunk];
ck->i_offset = BOXDATA(p_co64)->i_chunk_offset[i_chunk];
ck->i_first_dts = 0;
ck->p_sample_count_dts = NULL;
ck->p_sample_delta_dts = NULL;
ck->p_sample_count_pts = NULL;
ck->p_sample_offset_pts = NULL;
}
/* 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 = BOXDATA(p_stsc)->i_entry_count;
while( i_index-- > 0 )
{
for( i_chunk = BOXDATA(p_stsc)->i_first_chunk[i_index] - 1;
i_chunk < i_last; i_chunk++ )
{
if( i_chunk >= p_demux_track->i_chunk_count )
{
msg_Warn( p_demux, "corrupted chunk table" );
return VLC_EGENERIC;
}
p_demux_track->chunk[i_chunk].i_sample_description_index =
BOXDATA(p_stsc)->i_sample_description_index[i_index];
p_demux_track->chunk[i_chunk].i_sample_count =
BOXDATA(p_stsc)->i_samples_per_chunk[i_index];
}
i_last = BOXDATA(p_stsc)->i_first_chunk[i_index] - 1;
}
if ( p_demux_track->i_chunk_count )
{
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 );
if ( p_demux_track->i_chunk_count && (
p_sys->moovfragment.i_chunk_range_min_offset == 0 ||
p_sys->moovfragment.i_chunk_range_min_offset > p_demux_track->chunk[0].i_offset
) )
p_sys->moovfragment.i_chunk_range_min_offset = p_demux_track->chunk[0].i_offset;
return VLC_SUCCESS;
}
static int xTTS_CountEntries( demux_t *p_demux, uint32_t *pi_entry /* out */,
const uint32_t i_index,
uint32_t i_index_samples_left,
uint32_t i_sample_count,
const uint32_t *pi_index_sample_count,
const uint32_t i_table_count )
{
uint32_t i_array_offset;
while( i_sample_count > 0 )
{
if ( likely((UINT32_MAX - i_index) >= *pi_entry) )
i_array_offset = i_index + *pi_entry;
else
return VLC_EGENERIC;
if ( i_array_offset >= i_table_count )
{
msg_Err( p_demux, "invalid index counting total samples %u %u", i_array_offset, i_table_count );
return VLC_EGENERIC;
}
if ( i_index_samples_left )
{
if ( i_index_samples_left > i_sample_count )
{
i_index_samples_left -= i_sample_count;
i_sample_count = 0;
*pi_entry +=1; /* No samples left, go copy */
break;
}
else
{
i_sample_count -= i_index_samples_left;
i_index_samples_left = 0;
*pi_entry += 1;
continue;
}
}
else
{
i_sample_count -= __MIN( i_sample_count, pi_index_sample_count[i_array_offset] );
*pi_entry += 1;
}
}
return VLC_SUCCESS;
}
static int TrackCreateSamplesIndex( demux_t *p_demux,
mp4_track_t *p_demux_track )
{
demux_sys_t *p_sys = p_demux->p_sys;
MP4_Box_t *p_box;
MP4_Box_data_stsz_t *stsz;
/* TODO use also stss and stsh table for seeking */
/* FIXME use edit table */
/* Find stsz
* Gives the sample size for each samples. There is also a stz2 table
* (compressed form) that we need to implement TODO */
p_box = MP4_BoxGet( p_demux_track->p_stbl, "stsz" );
if( !p_box )
{
/* FIXME and stz2 */
msg_Warn( p_demux, "cannot find STSZ box" );
return VLC_EGENERIC;
}
stsz = p_box->data.p_stsz;
/* Use stsz table to create a sample number -> sample size table */
p_demux_track->i_sample_count = stsz->i_sample_count;
if( stsz->i_sample_size )
{
/* 1: all sample have the same size, so no need to construct a table */
p_demux_track->i_sample_size = 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 ) );
if( p_demux_track->p_sample_size == NULL )
return VLC_ENOMEM;
for( uint32_t i_sample = 0; i_sample < p_demux_track->i_sample_count; i_sample++ )
{
p_demux_track->p_sample_size[i_sample] =
stsz->i_entry_size[i_sample];
}
}
if ( p_demux_track->i_chunk_count )
{
mp4_chunk_t *lastchunk = &p_demux_track->chunk[p_demux_track->i_chunk_count - 1];
uint64_t i_total_size = lastchunk->i_offset;
if ( p_demux_track->i_sample_size != 0 ) /* all samples have same size */
{
i_total_size += (uint64_t)p_demux_track->i_sample_size * lastchunk->i_sample_count;
}
else
{
if( (uint64_t)lastchunk->i_sample_count + p_demux_track->i_chunk_count - 1 > stsz->i_sample_count )
{
msg_Err( p_demux, "invalid samples table: stsz table is too small" );
return VLC_EGENERIC;
}
for( uint32_t i=stsz->i_sample_count - lastchunk->i_sample_count;
i<stsz->i_sample_count; i++)
{
i_total_size += stsz->i_entry_size[i];
}
}
if ( i_total_size > p_sys->moovfragment.i_chunk_range_max_offset )
p_sys->moovfragment.i_chunk_range_max_offset = i_total_size;
}
/* Use stts table to create a sample number -> dts table.
* XXX: 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 (problem with raw stream where a sample is sometime
* just channels*bits_per_sample/8 */
/* FIXME: refactor STTS & CTTS, STTS having now only few extra lines and
* differing in 2/2 fields and 1 signedness */
mtime_t i_next_dts = 0;
/* Find stts
* Gives mapping between sample and decoding time
*/
p_box = MP4_BoxGet( p_demux_track->p_stbl, "stts" );
if( !p_box )
{
msg_Warn( p_demux, "cannot find STTS box" );
return VLC_EGENERIC;
}
else
{
MP4_Box_data_stts_t *stts = p_box->data.p_stts;
msg_Warn( p_demux, "STTS table of %"PRIu32" entries", stts->i_entry_count );
/* Create sample -> dts table per chunk */
uint32_t i_index = 0;
uint32_t i_current_index_samples_left = 0;
for( uint32_t i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
{
mp4_chunk_t *ck = &p_demux_track->chunk[i_chunk];
uint32_t i_entry, i_sample_count;
/* save first dts */
ck->i_first_dts = i_next_dts;
ck->i_last_dts = i_next_dts;
/* count how many entries are needed for this chunk
* for p_sample_delta_dts and p_sample_count_dts */
i_entry = 0;
int i_ret = xTTS_CountEntries( p_demux, &i_entry, i_index,
i_current_index_samples_left,
ck->i_sample_count,
stts->pi_sample_count,
stts->i_entry_count );
if ( i_ret != VLC_SUCCESS )
return i_ret;
/* allocate them */
ck->p_sample_count_dts = calloc( i_entry, sizeof( uint32_t ) );
ck->p_sample_delta_dts = calloc( i_entry, sizeof( uint32_t ) );
if( !ck->p_sample_count_dts || !ck->p_sample_delta_dts )
{
msg_Err( p_demux, "can't allocate memory for i_entry=%"PRIu32, i_entry );
return VLC_ENOMEM;
}
/* now copy */
i_sample_count = ck->i_sample_count;
for( uint32_t i = 0; i < i_entry; i++ )
{
if ( i_current_index_samples_left )
{
if ( i_current_index_samples_left > i_sample_count )
{
if ( i_sample_count ) ck->i_last_dts = i_next_dts;
ck->p_sample_count_dts[i] = i_sample_count;
ck->p_sample_delta_dts[i] = stts->pi_sample_delta[i_index];
i_next_dts += ck->p_sample_count_dts[i] * stts->pi_sample_delta[i_index];
i_current_index_samples_left -= i_sample_count;
i_sample_count = 0;
assert( i == i_entry - 1 );
break;
}
else
{
if ( i_current_index_samples_left ) ck->i_last_dts = i_next_dts;
ck->p_sample_count_dts[i] = i_current_index_samples_left;
ck->p_sample_delta_dts[i] = stts->pi_sample_delta[i_index];
i_next_dts += ck->p_sample_count_dts[i] * stts->pi_sample_delta[i_index];
i_sample_count -= i_current_index_samples_left;
i_current_index_samples_left = 0;
i_index++;
}
}
else
{
if ( stts->pi_sample_count[i_index] > i_sample_count )
{
if ( i_sample_count ) ck->i_last_dts = i_next_dts;
ck->p_sample_count_dts[i] = i_sample_count;
ck->p_sample_delta_dts[i] = stts->pi_sample_delta[i_index];
i_next_dts += ck->p_sample_count_dts[i] * stts->pi_sample_delta[i_index];
i_current_index_samples_left = stts->pi_sample_count[i_index] - i_sample_count;
i_sample_count = 0;
assert( i == i_entry - 1 );
// keep building from same index
}
else
{
if ( stts->pi_sample_count[i_index] ) ck->i_last_dts = i_next_dts;
ck->p_sample_count_dts[i] = stts->pi_sample_count[i_index];
ck->p_sample_delta_dts[i] = stts->pi_sample_delta[i_index];
i_next_dts += ck->p_sample_count_dts[i] * stts->pi_sample_delta[i_index];
i_sample_count -= stts->pi_sample_count[i_index];
i_index++;
}
}
}
}
}
/* Find ctts
* Gives the delta between decoding time (dts) and composition table (pts)
*/
p_box = MP4_BoxGet( p_demux_track->p_stbl, "ctts" );
if( p_box && p_box->data.p_ctts )
{
MP4_Box_data_ctts_t *ctts = p_box->data.p_ctts;
msg_Warn( p_demux, "CTTS table of %"PRIu32" entries", ctts->i_entry_count );
/* Create pts-dts table per chunk */
uint32_t i_index = 0;
uint32_t i_current_index_samples_left = 0;
for( uint32_t i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
{
mp4_chunk_t *ck = &p_demux_track->chunk[i_chunk];
uint32_t i_entry, i_sample_count;
/* count how many entries are needed for this chunk
* for p_sample_offset_pts and p_sample_count_pts */
i_entry = 0;
int i_ret = xTTS_CountEntries( p_demux, &i_entry, i_index,
i_current_index_samples_left,
ck->i_sample_count,
ctts->pi_sample_count,
ctts->i_entry_count );
if ( i_ret != VLC_SUCCESS )
return i_ret;
/* allocate them */
ck->p_sample_count_pts = calloc( i_entry, sizeof( uint32_t ) );
ck->p_sample_offset_pts = calloc( i_entry, sizeof( int32_t ) );
if( !ck->p_sample_count_pts || !ck->p_sample_offset_pts )
{
msg_Err( p_demux, "can't allocate memory for i_entry=%"PRIu32, i_entry );
return VLC_ENOMEM;
}
/* now copy */
i_sample_count = ck->i_sample_count;
for( uint32_t i = 0; i < i_entry; i++ )
{
if ( i_current_index_samples_left )
{
if ( i_current_index_samples_left > i_sample_count )
{
ck->p_sample_count_pts[i] = i_sample_count;
ck->p_sample_offset_pts[i] = ctts->pi_sample_offset[i_index];
i_current_index_samples_left -= i_sample_count;
i_sample_count = 0;
assert( i == i_entry - 1 );
break;
}
else
{
ck->p_sample_count_pts[i] = i_current_index_samples_left;
ck->p_sample_offset_pts[i] = ctts->pi_sample_offset[i_index];
i_sample_count -= i_current_index_samples_left;
i_current_index_samples_left = 0;
i_index++;
}
}
else
{
if ( ctts->pi_sample_count[i_index] > i_sample_count )
{
ck->p_sample_count_pts[i] = i_sample_count;
ck->p_sample_offset_pts[i] = ctts->pi_sample_offset[i_index];
i_current_index_samples_left = ctts->pi_sample_count[i_index] - i_sample_count;
i_sample_count = 0;
assert( i == i_entry - 1 );
// keep building from same index
}
else
{
ck->p_sample_count_pts[i] = ctts->pi_sample_count[i_index];
ck->p_sample_offset_pts[i] = ctts->pi_sample_offset[i_index];
i_sample_count -= ctts->pi_sample_count[i_index];
i_index++;
}
}
}
}
}
msg_Dbg( p_demux, "track[Id 0x%x] read %"PRIu32" samples length:%"PRId64"s",
p_demux_track->i_track_ID, p_demux_track->i_sample_count,
i_next_dts / p_demux_track->i_timescale );
return VLC_SUCCESS;
}
/**
* It computes the sample rate for a video track using the given sample
* description index
*/
static void TrackGetESSampleRate( demux_t *p_demux,
unsigned *pi_num, unsigned *pi_den,
const mp4_track_t *p_track,
unsigned i_sd_index,
unsigned i_chunk )
{
*pi_num = 0;
*pi_den = 0;
MP4_Box_t *p_trak = MP4_GetTrakByTrackID( MP4_BoxGet( p_demux->p_sys->p_root, "/moov" ),
p_track->i_track_ID );
MP4_Box_t *p_mdhd = MP4_BoxGet( p_trak, "mdia/mdhd" );
if ( p_mdhd && BOXDATA(p_mdhd) )
{
vlc_ureduce( pi_num, pi_den,
(uint64_t) BOXDATA(p_mdhd)->i_timescale * p_track->i_sample_count,
(uint64_t) BOXDATA(p_mdhd)->i_duration,
UINT16_MAX );
return;
}
if( p_track->i_chunk_count == 0 )
return;
/* */
const mp4_chunk_t *p_chunk = &p_track->chunk[i_chunk];
while( p_chunk > &p_track->chunk[0] &&
p_chunk[-1].i_sample_description_index == i_sd_index )
{
p_chunk--;
}
uint64_t i_sample = 0;
uint64_t i_first_dts = p_chunk->i_first_dts;
uint64_t i_last_dts;
do
{
i_sample += p_chunk->i_sample_count;
i_last_dts = p_chunk->i_last_dts;
p_chunk++;
}
while( p_chunk < &p_track->chunk[p_track->i_chunk_count] &&
p_chunk->i_sample_description_index == i_sd_index );
if( i_sample > 1 && i_first_dts < i_last_dts )
vlc_ureduce( pi_num, pi_den,
( i_sample - 1) * p_track->i_timescale,
i_last_dts - i_first_dts,
UINT16_MAX);
}
/*
* 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 )
{
demux_sys_t *p_sys = p_demux->p_sys;
unsigned int i_sample_description_index;
if( p_sys->b_fragmented || p_track->i_chunk_count == 0 )
i_sample_description_index = 1; /* XXX */
else
i_sample_description_index =
p_track->chunk[i_chunk].i_sample_description_index;
if( pp_es )
*pp_es = NULL;
if( !i_sample_description_index )
{
msg_Warn( p_demux, "invalid SampleEntry index (track[Id 0x%x])",
p_track->i_track_ID );
return VLC_EGENERIC;
}
MP4_Box_t *p_sample = MP4_BoxGet( p_track->p_stsd, "[%d]",
i_sample_description_index - 1 );
if( !p_sample ||
( !p_sample->data.p_payload && 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;
MP4_Box_t *p_frma;
if( ( p_frma = MP4_BoxGet( p_track->p_sample, "sinf/frma" ) ) && p_frma->data.p_frma )
{
msg_Warn( p_demux, "Original Format Box: %4.4s", (char *)&p_frma->data.p_frma->i_type );
p_sample->i_type = p_frma->data.p_frma->i_type;
}
/* */
switch( p_track->fmt.i_cat )
{
case VIDEO_ES:
if ( !p_sample->data.p_sample_vide || p_sample->i_handler != ATOM_vide )
break;
SetupVideoES( p_demux, p_track, p_sample );
/* Set frame rate */
TrackGetESSampleRate( p_demux,
&p_track->fmt.video.i_frame_rate,
&p_track->fmt.video.i_frame_rate_base,
p_track, i_sample_description_index, i_chunk );
p_demux->p_sys->f_fps = (float)p_track->fmt.video.i_frame_rate /
(float)p_track->fmt.video.i_frame_rate_base;
break;
case AUDIO_ES:
if ( !p_sample->data.p_sample_soun || p_sample->i_handler != ATOM_soun )
break;
SetupAudioES( p_demux, p_track, p_sample );
break;
case SPU_ES:
if ( !p_sample->data.p_sample_text || p_sample->i_handler != ATOM_text )
break;
SetupSpuES( p_demux, p_track, p_sample );
default:
break;
}
if( pp_es )
*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_box_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->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->BOXDATA(p_elst)->i_entry_count > 0 )
{
MP4_Box_data_elst_t *elst = p_track->BOXDATA(p_elst);
int64_t i_mvt= i_start * p_sys->i_timescale / CLOCK_FREQ;
/* now calculate i_start for this elst */
/* offset */
i_start -= p_track->i_elst_time * CLOCK_FREQ / 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 / CLOCK_FREQ;
/* 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 %"PRId64"ms (movie)-> %"PRId64
"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 / CLOCK_FREQ;
}
/* 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( (uint64_t)i_start >= p_track->chunk[i_chunk].i_first_dts &&
(uint64_t)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] < (uint64_t)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_box_stss = MP4_BoxGet( p_track->p_stbl, "stss" ) ) )
{
MP4_Box_data_stss_t *p_stss = p_box_stss->data.p_stss;
msg_Dbg( p_demux, "track[Id 0x%x] using Sync Sample Box (stss)",
p_track->i_track_ID );
for( unsigned i_index = 0; i_index < p_stss->i_entry_count; i_index++ )
{
if( i_index >= p_stss->i_entry_count - 1 ||
i_sample < p_stss->i_sample_number[i_index+1] )
{
unsigned i_sync_sample = p_stss->i_sample_number[i_index];
msg_Dbg( p_demux, "stss gives %d --> %d (sample number)",
i_sample, i_sync_sample );
if( i_sync_sample <= i_sample )
{
while( i_chunk > 0 &&
i_sync_sample < p_track->chunk[i_chunk].i_sample_first )
i_chunk--;
}
else
{
while( i_chunk < p_track->i_chunk_count - 1 &&
i_sync_sample >= p_track->chunk[i_chunk].i_sample_first +
p_track->chunk[i_chunk].i_sample_count )
i_chunk++;
}
i_sample = i_sync_sample;
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 )
{
bool b_reselect = false;
/* now see if actual es is ok */
if( 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_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 = false;
p_track->b_selected = 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,
bool b_force_enable )
{
demux_sys_t *p_sys = p_demux->p_sys;
p_track->p_track = 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_udta;
MP4_Box_t *p_hdlr;
MP4_Box_t *p_vmhd;
MP4_Box_t *p_smhd;
char language[4] = { '\0' };
/* hint track unsupported */
/* set default value (-> track unusable) */
p_track->b_ok = false;
p_track->b_enable = false;
p_track->b_selected = false;
p_track->b_chapter = false;
p_track->b_mac_encoding = 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 =
( ( BOXDATA(p_tkhd)->i_flags&MP4_TRACK_ENABLED ) != 0 );
if( !p_track->b_enable )
p_track->fmt.i_priority = ES_PRIORITY_NOT_DEFAULTABLE;
p_track->i_track_ID = BOXDATA(p_tkhd)->i_track_ID;
p_track->i_width = BOXDATA(p_tkhd)->i_width / BLOCK16x16;
p_track->i_height = BOXDATA(p_tkhd)->i_height / BLOCK16x16;
p_track->f_rotation = BOXDATA(p_tkhd)->f_rotation;
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 = BOXDATA(p_mdhd)->i_timescale;
if( p_track->i_timescale == 0 )
return;
memcpy( &language, BOXDATA(p_mdhd)->rgs_language, 3 );
p_track->b_mac_encoding = BOXDATA(p_mdhd)->b_mac_encoding;
switch( p_hdlr->data.p_hdlr->i_handler_type )
{
case( ATOM_soun ):
if( !( p_smhd = MP4_BoxGet( p_box_trak, "mdia/minf/smhd" ) ) )
{
return;
}
p_track->fmt.i_cat = AUDIO_ES;
break;
case( ATOM_vide ):
if( !( p_vmhd = MP4_BoxGet( p_box_trak, "mdia/minf/vmhd" ) ) )
{
return;
}
p_track->fmt.i_cat = VIDEO_ES;
break;
case( ATOM_tx3g ):
case( ATOM_text ):
case( ATOM_subp ):
case( ATOM_sbtl ):
p_track->fmt.i_codec = VLC_CODEC_TX3G;
p_track->fmt.i_cat = SPU_ES;
break;
/* closed captions */
case( ATOM_clcp ):
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 = BOXDATA(p_elst);
unsigned int i;
msg_Warn( p_demux, "elst box found" );
for( i = 0; i < elst->i_entry_count; i++ )
{
msg_Dbg( p_demux, " - [%d] duration=%"PRId64"ms media time=%"PRId64
"ms) rate=%d.%d", i,
elst->i_segment_duration[i] * 1000 / p_sys->i_timescale,
elst->i_media_time[i] >= 0 ?
(int64_t)(elst->i_media_time[i] * 1000 / p_track->i_timescale) :
INT64_C(-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;
}
/* Set language */
if( *language && 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_box_iter;
for( p_box_iter = p_udta->p_first; p_box_iter != NULL;
p_box_iter = p_box_iter->p_next )
{
switch( p_box_iter->i_type )
{
case ATOM_0xa9nam:
case ATOM_name:
p_track->fmt.psz_description =
strdup( p_box_iter->data.p_string->psz_text );
default:
break;
}
}
}
/* Create chunk index table and sample index table */
if( TrackCreateChunksIndex( p_demux,p_track ) ||
TrackCreateSamplesIndex( p_demux, p_track ) )
{
msg_Err( p_demux, "cannot create chunks index" );
return; /* cannot create chunks index */
}
p_track->i_chunk = 0;
p_track->i_sample = 0;
/* Mark chapter only track */
if( p_sys->p_tref_chap )
{
MP4_Box_data_tref_generic_t *p_chap = p_sys->p_tref_chap->data.p_tref_generic;
unsigned int i;
for( i = 0; i < p_chap->i_entry_count; i++ )
{
if( p_track->i_track_ID == p_chap->i_track_ID[i] &&
p_track->fmt.i_cat == UNKNOWN_ES )
{
p_track->b_chapter = true;
p_track->b_enable = false;
break;
}
}
}
const MP4_Box_t *p_tsel;
/* now create es */
if( b_force_enable &&
( p_track->fmt.i_cat == VIDEO_ES || p_track->fmt.i_cat == AUDIO_ES ) )
{
msg_Warn( p_demux, "Enabling track[Id 0x%x] (buggy file without enabled track)",
p_track->i_track_ID );
p_track->b_enable = true;
p_track->fmt.i_priority = ES_PRIORITY_SELECTABLE_MIN;
}
else if ( (p_tsel = MP4_BoxGet( p_box_trak, "udta/tsel" )) )
{
if ( BOXDATA(p_tsel) && BOXDATA(p_tsel)->i_switch_group )
{
p_track->i_switch_group = BOXDATA(p_tsel)->i_switch_group;
int i_priority = ES_PRIORITY_SELECTABLE_MIN;
for ( unsigned int i = 0; i < p_sys->i_tracks; i++ )
{
const mp4_track_t *p_other = &p_sys->track[i];
if( p_other && p_other != p_track &&
p_other->fmt.i_cat == p_track->fmt.i_cat &&
p_track->i_switch_group == p_other->i_switch_group )
i_priority = __MAX( i_priority, p_other->fmt.i_priority + 1 );
}
/* VLC only support ES priority for AUDIO_ES and SPU_ES.
If there's another VIDEO_ES in the same group, we need to unselect it then */
if ( p_track->fmt.i_cat == VIDEO_ES && i_priority > ES_PRIORITY_SELECTABLE_MIN )
p_track->fmt.i_priority = ES_PRIORITY_NOT_DEFAULTABLE;
else
p_track->fmt.i_priority = i_priority;
}
}
/* If there's no tsel, try to enable the track coming first in edit list */
else if ( p_track->p_elst && p_track->fmt.i_priority == ES_PRIORITY_SELECTABLE_MIN )
{
#define MAX_SELECTABLE (INT_MAX - ES_PRIORITY_SELECTABLE_MIN)
for ( uint32_t i=0; i<p_track->BOXDATA(p_elst)->i_entry_count; i++ )
{
if ( p_track->BOXDATA(p_elst)->i_media_time[i] >= 0 &&
p_track->BOXDATA(p_elst)->i_segment_duration[i] )
{
/* We do selection by inverting start time into priority.
The track with earliest edit will have the highest prio */
const int i_time = __MIN( MAX_SELECTABLE, p_track->BOXDATA(p_elst)->i_media_time[i] );
p_track->fmt.i_priority = ES_PRIORITY_SELECTABLE_MIN + MAX_SELECTABLE - i_time;
break;
}
}
}
p_track->p_es = NULL;
if( TrackCreateES( p_demux,
p_track, p_track->i_chunk,
p_track->b_chapter ? NULL : &p_track->p_es ) )
{
msg_Err( p_demux, "cannot create es for track[Id 0x%x]",
p_track->i_track_ID );
return;
}
p_track->b_ok = true;
#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
}
static void FreeAndResetChunk( mp4_chunk_t *ck )
{
free( ck->p_sample_count_dts );
free( ck->p_sample_delta_dts );
free( ck->p_sample_count_pts );
free( ck->p_sample_offset_pts );
free( ck->p_sample_size );
for( uint32_t i = 0; i < ck->i_sample_count; i++ )
free( ck->p_sample_data[i] );
free( ck->p_sample_data );
memset( ck, 0, sizeof( mp4_chunk_t ) );
}
/****************************************************************************
* MP4_TrackDestroy:
****************************************************************************
* Destroy a track created by MP4_TrackCreate.
****************************************************************************/
static void MP4_TrackDestroy( mp4_track_t *p_track )
{
unsigned int i_chunk;
p_track->b_ok = false;
p_track->b_enable = false;
p_track->b_selected = false;
es_format_Clean( &p_track->fmt );
for( i_chunk = 0; i_chunk < p_track->i_chunk_count; i_chunk++ )
{
if( p_track->chunk )
{
FREENULL(p_track->chunk[i_chunk].p_sample_count_dts);
FREENULL(p_track->chunk[i_chunk].p_sample_delta_dts );
FREENULL(p_track->chunk[i_chunk].p_sample_count_pts);
FREENULL(p_track->chunk[i_chunk].p_sample_offset_pts );
}
}
FREENULL( p_track->chunk );
if( p_track->cchunk ) {
FreeAndResetChunk( p_track->cchunk );
FREENULL( p_track->cchunk );
}
if( !p_track->i_sample_size )
{
FREENULL( p_track->p_sample_size );
}
if ( p_track->asfinfo.p_frame )
block_ChainRelease( p_track->asfinfo.p_frame );
}
static int MP4_TrackSelect( demux_t *p_demux, mp4_track_t *p_track,
mtime_t i_start )
{
if( !p_track->b_ok || p_track->b_chapter )
{
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 || p_track->b_chapter )
{
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, false );
}
p_track->b_selected = 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 || p_track->b_chapter )
return VLC_EGENERIC;
p_track->b_selected = 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 = true;
if( !TrackGotoChunkSample( p_demux, p_track, i_chunk, i_sample ) )
p_track->b_selected = true;
return p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC;
}
/*
* 3 types: for audio
*
*/
#define QT_V0_MAX_SAMPLES 1024
static uint32_t MP4_TrackGetReadSize( mp4_track_t *p_track, uint32_t *pi_nb_samples )
{
uint32_t i_size = 0;
*pi_nb_samples = 0;
if ( p_track->i_sample == p_track->i_sample_count )
return 0;
if ( p_track->fmt.i_cat != AUDIO_ES )
{
*pi_nb_samples = 1;
if( p_track->i_sample_size == 0 ) /* all sizes are different */
return p_track->p_sample_size[p_track->i_sample];
else
return p_track->i_sample_size;
}
else
{
const MP4_Box_data_sample_soun_t *p_soun = p_track->p_sample->data.p_sample_soun;
const mp4_chunk_t *p_chunk = &p_track->chunk[p_track->i_chunk];
uint32_t i_max_samples = p_chunk->i_sample_count - p_chunk->i_sample + 1;
/* Group audio packets so we don't call demux for single sample unit */
if( p_track->fmt.i_original_fourcc == VLC_CODEC_DVD_LPCM &&
p_soun->i_constLPCMframesperaudiopacket &&
p_soun->i_constbytesperaudiopacket )
{
/* uncompressed case */
uint32_t i_packets = i_max_samples / p_soun->i_constLPCMframesperaudiopacket;
if ( UINT32_MAX / p_soun->i_constbytesperaudiopacket < i_packets )
i_packets = UINT32_MAX / p_soun->i_constbytesperaudiopacket;
*pi_nb_samples = i_packets * p_soun->i_constLPCMframesperaudiopacket;
return i_packets * p_soun->i_constbytesperaudiopacket;
}
/* all samples have a different size */
if( p_track->i_sample_size == 0 )
{
*pi_nb_samples = 1;
return p_track->p_sample_size[p_track->i_sample];
}
if( p_soun->i_qt_version == 1 )
{
if ( p_soun->i_compressionid != 0 || p_soun->i_bytes_per_sample > 1 ) /* compressed */
{
/* in this case we are dealing with compressed data
-2 in V1: additional fields are meaningless (VBR and such) */
*pi_nb_samples = i_max_samples;//p_track->chunk[p_track->i_chunk].i_sample_count;
if( p_track->fmt.audio.i_blockalign > 1 )
*pi_nb_samples = p_soun->i_sample_per_packet;
i_size = *pi_nb_samples / p_soun->i_sample_per_packet * p_soun->i_bytes_per_frame;
return i_size;
}
else /* uncompressed case */
{
uint32_t i_packets;
if( p_track->fmt.audio.i_blockalign > 1 )
i_packets = 1;
else
i_packets = i_max_samples / p_soun->i_sample_per_packet;
if ( UINT32_MAX / p_soun->i_bytes_per_frame < i_packets )
i_packets = UINT32_MAX / p_soun->i_bytes_per_frame;
*pi_nb_samples = i_packets * p_soun->i_sample_per_packet;
i_size = i_packets * p_soun->i_bytes_per_frame;
return i_size;
}
}
/* uncompressed v0 */
*pi_nb_samples = 0;
for( uint32_t i=p_track->i_sample;
i<p_chunk->i_sample_first+p_chunk->i_sample_count &&
i<p_track->i_sample_count;
i++ )
{
(*pi_nb_samples)++;
if ( p_track->i_sample_size == 0 )
i_size += p_track->p_sample_size[i];
else
i_size += p_track->i_sample_size;
if ( *pi_nb_samples == QT_V0_MAX_SAMPLES )
break;
}
}
//fprintf( stderr, "size=%d\n", 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_track->fmt.i_cat != AUDIO_ES || p_soun->i_qt_version == 0 )
{
i_pos += ( p_track->i_sample -
p_track->chunk[p_track->i_chunk].i_sample_first ) *
p_track->i_sample_size;
}
else
{
/* we read chunk by chunk unless a blockalign is requested */
if( p_track->fmt.audio.i_blockalign > 1 )
i_pos += ( p_track->i_sample - p_track->chunk[p_track->i_chunk].i_sample_first ) /
p_soun->i_sample_per_packet * p_soun->i_bytes_per_frame;
}
}
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, uint32_t i_samples )
{
if ( UINT32_MAX - p_track->i_sample < i_samples )
{
p_track->i_sample = UINT32_MAX;
return VLC_EGENERIC;
}
p_track->i_sample += i_samples;
if( p_track->i_sample >= p_track->i_sample_count )
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->BOXDATA(p_elst)->i_entry_count > 0 )
{
demux_sys_t *p_sys = p_demux->p_sys;
MP4_Box_data_elst_t *elst = p_track->BOXDATA(p_elst);
uint64_t i_mvt = MP4_TrackGetDTS( p_demux, p_track ) *
p_sys->i_timescale / CLOCK_FREQ;
if( (unsigned int)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_TrackGetDTS( 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->BOXDATA(p_elst)->i_entry_count > 0 )
{
MP4_Box_data_elst_t *elst = tk->BOXDATA(p_elst);
int64_t i_mvt= i_time * p_sys->i_timescale / CLOCK_FREQ;
for( tk->i_elst = 0; (unsigned int)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( (unsigned int)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 );
}
}
/******************************************************************************
* Here are the functions used for fragmented MP4
*****************************************************************************/
/**
* It computes the sample rate for a video track using current video chunk
*/
static void ChunkGetESSampleRate( unsigned *pi_num, unsigned *pi_den,
const mp4_track_t *p_track )
{
if( p_track->cchunk->i_last_dts == 0 )
return;
*pi_num = 0;
*pi_den = 0;
/* */
const mp4_chunk_t *p_chunk = p_track->cchunk;
uint32_t i_sample = p_chunk->i_sample_count;
uint64_t i_first_dts = p_chunk->i_first_dts;
uint64_t i_last_dts = p_chunk->i_last_dts;
if( i_sample > 1 && i_first_dts < i_last_dts )
vlc_ureduce( pi_num, pi_den,
( i_sample - 1) * p_track->i_timescale,
i_last_dts - i_first_dts,
UINT16_MAX);
}
/**
* Build raw avcC box (without the 8 bytes header)
* \return The size of the box.
*/
static int build_raw_avcC( uint8_t **p_extra, const uint8_t *CodecPrivateData,
const unsigned cpd_len )
{
uint8_t *avcC;
unsigned sps_len = 0, pps_len = 0;
const uint32_t mark = 0x00000001;
assert( CodecPrivateData[0] == 0 );
assert( CodecPrivateData[1] == 0 );
assert( CodecPrivateData[2] == 0 );
assert( CodecPrivateData[3] == 1 );
uint32_t length = cpd_len + 3;
avcC = calloc( length, 1 );
if( unlikely( avcC == NULL ) )
return 0;
uint8_t *sps = avcC + 8;
uint32_t candidate = ~mark;
CodecPrivateData += 4;
for( unsigned i = 0; i < cpd_len - 4; i++ )
{
sps[i] = CodecPrivateData[i];
candidate = (candidate << 8) | CodecPrivateData[i];
if( candidate == mark )
{
sps_len = i - 3;
break;
}
}
if( sps_len == 0 )
{
free( avcC );
return 0;
}
uint8_t *pps = sps + sps_len + 3;
pps_len = cpd_len - sps_len - 4 * 2;
memcpy( pps, CodecPrivateData + sps_len + 4, pps_len );
/* XXX */
uint8_t AVCProfileIndication = 0x64;
uint8_t profile_compatibility = 0x40;
uint8_t AVCLevelIndication = 0x1f;
uint8_t lengthSizeMinusOne = 0x03;
avcC[0] = 1;
avcC[1] = AVCProfileIndication;
avcC[2] = profile_compatibility;
avcC[3] = AVCLevelIndication;
avcC[4] = 0xfc + lengthSizeMinusOne;
avcC[5] = 0xe0 + 1;
avcC[6] = (sps_len & 0xff00)>>8;
avcC[7] = sps_len & 0xff;
avcC[8+sps_len] = 1;
avcC[9+sps_len] = (pps_len & 0xff00) >> 8;
avcC[10+sps_len] = pps_len & 0xff;
*p_extra = avcC;
return length;
}
/**
* Build a mp4_track_t from a StraBox
*/
static inline int MP4_SetCodecExtraData( es_format_t *fmt, MP4_Box_data_stra_t *p_data )
{
fmt->i_extra = p_data->cpd_len;
fmt->p_extra = malloc( p_data->cpd_len );
if( unlikely( !fmt->p_extra ) )
return VLC_ENOMEM;
memcpy( fmt->p_extra, p_data->CodecPrivateData, p_data->cpd_len );
return VLC_SUCCESS;
}
static int MP4_frg_TrackCreate( demux_t *p_demux, mp4_track_t *p_track, MP4_Box_t *p_stra )
{
demux_sys_t *p_sys = p_demux->p_sys;
int ret;
MP4_Box_data_stra_t *p_data = BOXDATA(p_stra);
if( !p_data )
return VLC_EGENERIC;
p_track->b_ok = true;
p_track->b_selected = false;
p_track->i_sample_count = UINT32_MAX;
p_track->i_timescale = p_sys->i_timescale;
p_track->i_width = p_data->MaxWidth;
p_track->i_height = p_data->MaxHeight;
p_track->i_track_ID = p_data->i_track_ID;
es_format_t *fmt = &p_track->fmt;
if( fmt == NULL )
return VLC_EGENERIC;
es_format_Init( fmt, p_data->i_es_cat, 0 );
/* Set language FIXME */
fmt->psz_language = strdup( "en" );
fmt->i_original_fourcc = p_data->FourCC;
fmt->i_codec = vlc_fourcc_GetCodec( fmt->i_cat, p_data->FourCC );
uint8_t **p_extra = (uint8_t **)&fmt->p_extra;
/* See http://msdn.microsoft.com/en-us/library/ff728116%28v=vs.90%29.aspx
* for MS weird use of FourCC*/
switch( fmt->i_cat )
{
case VIDEO_ES:
if( p_data->FourCC == VLC_FOURCC( 'A', 'V', 'C', '1' ) ||
p_data->FourCC == VLC_FOURCC( 'A', 'V', 'C', 'B' ) ||
p_data->FourCC == VLC_FOURCC( 'H', '2', '6', '4' ) )
{
fmt->i_extra = build_raw_avcC( p_extra,
p_data->CodecPrivateData, p_data->cpd_len );
}
else
{
ret = MP4_SetCodecExtraData( fmt, p_data );
if( ret != VLC_SUCCESS )
return ret;
}
fmt->video.i_width = p_data->MaxWidth;
fmt->video.i_height = p_data->MaxHeight;
fmt->video.i_bits_per_pixel = 0x18;
fmt->video.i_visible_width = p_data->MaxWidth;
fmt->video.i_visible_height = p_data->MaxHeight;
/* Frame rate */
ChunkGetESSampleRate( &fmt->video.i_frame_rate,
&fmt->video.i_frame_rate_base, p_track );
if( fmt->video.i_frame_rate_base != 0 )
{
p_demux->p_sys->f_fps = (float)fmt->video.i_frame_rate /
(float)fmt->video.i_frame_rate_base;
}
else
p_demux->p_sys->f_fps = 24;
break;
case AUDIO_ES:
fmt->audio.i_channels = p_data->Channels;
fmt->audio.i_rate = p_data->SamplingRate;
fmt->audio.i_bitspersample = p_data->BitsPerSample;
fmt->audio.i_blockalign = p_data->nBlockAlign;
fmt->i_bitrate = p_data->Bitrate;
ret = MP4_SetCodecExtraData( fmt, p_data );
if( ret != VLC_SUCCESS )
return ret;
break;
default:
break;
}
return VLC_SUCCESS;
}
/**
* Return the track identified by tid
*/
static mp4_track_t *MP4_frg_GetTrackByID( demux_t *p_demux, const uint32_t tid )
{
demux_sys_t *p_sys = p_demux->p_sys;
mp4_track_t *ret = NULL;
for( unsigned i = 0; i < p_sys->i_tracks; i++ )
{
ret = &p_sys->track[i];
if( ret->i_track_ID == tid )
return ret;
}
msg_Err( p_demux, "MP4_frg_GetTrack: track %"PRIu32" not found!", tid );
return NULL;
}
static void FlushChunk( demux_t *p_demux, mp4_track_t *tk )
{
msg_Dbg( p_demux, "Flushing chunk for track id %u", tk->i_track_ID );
mp4_chunk_t *ck = tk->cchunk;
while( ck->i_sample < ck->i_sample_count )
{
block_t *p_block;
int64_t i_delta;
if( ck->p_sample_size == NULL || ck->p_sample_data == NULL )
return;
uint32_t sample_size = ck->p_sample_size[ck->i_sample];
assert( sample_size > 0 );
p_block = block_Alloc( sample_size );
if( unlikely( !p_block ) )
return;
uint8_t *src = ck->p_sample_data[ck->i_sample];
memcpy( p_block->p_buffer, src, sample_size );
ck->i_sample++;
/* dts */
p_block->i_dts = VLC_TS_0 + MP4_TrackGetDTS( p_demux, tk );
/* pts */
i_delta = MP4_TrackGetPTSDelta( p_demux, tk );
if( i_delta != -1 )
p_block->i_pts = p_block->i_dts + i_delta;
else if( tk->fmt.i_cat != VIDEO_ES )
p_block->i_pts = p_block->i_dts;
else
p_block->i_pts = VLC_TS_INVALID;
MP4_Block_Send( p_demux, tk, p_block );
tk->i_sample++;
}
}
/**
* Re-init decoder.
* \Note If we call that function too soon,
* before the track has been selected by MP4_TrackSelect
* (during the first execution of Demux), then the track gets disabled
*/
static int ReInitDecoder( demux_t *p_demux, mp4_track_t *p_track )
{
demux_sys_t *p_sys = p_demux->p_sys;
uint32_t i_sample = 0;
bool b_smooth = false;
MP4_Box_t *p_stra = NULL, *p_trak = NULL;
if( !CmpUUID( &p_sys->p_root->p_first->i_uuid, &SmooBoxUUID ) )
b_smooth = true;
if( b_smooth )
{
p_stra = MP4_BoxGet( p_sys->p_root, "uuid/uuid[0]" );
if( !p_stra || CmpUUID( &p_stra->i_uuid, &StraBoxUUID ) )
return VLC_EGENERIC;
}
else /* DASH */
{
p_trak = MP4_BoxGet( p_sys->p_root, "/moov/trak[0]" );
if( !p_trak )
return VLC_EGENERIC;
}
i_sample = p_track->i_sample;
es_out_Del( p_demux->out, p_track->p_es );
es_format_Clean( &p_track->fmt );
if( b_smooth )
MP4_frg_TrackCreate( p_demux, p_track, p_stra );
else /* DASH */
MP4_TrackCreate( p_demux, p_track, p_trak, true );
p_track->i_sample = i_sample;
/* Temporary hack until we support track selection */
p_track->b_selected = true;
p_track->b_ok = true;
p_track->b_enable = true;
p_track->p_es = es_out_Add( p_demux->out, &p_track->fmt );
p_track->b_codec_need_restart = false;
return VLC_SUCCESS;
}
/**
* This function fills a mp4_chunk_t structure from a MP4_Box_t (p_chunk).
* The 'i_tk_id' argument returns the ID of the track the chunk belongs to.
* \note p_chunk usually contains a 'moof' and a 'mdat', and might contain a 'sidx'.
* \return VLC_SUCCESS, VLC_EGENERIC or VLC_ENOMEM.
*/
static int MP4_frg_GetChunk( demux_t *p_demux, MP4_Box_t *p_chunk, unsigned *i_tk_id )
{
MP4_Box_t *p_sidx = MP4_BoxGet( p_chunk, "sidx" );
MP4_Box_t *p_moof = MP4_BoxGet( p_chunk, "moof" );
if( p_moof == NULL)
{
msg_Warn( p_demux, "no moof box found!" );
return VLC_EGENERIC;
}
MP4_Box_t *p_traf = MP4_BoxGet( p_moof, "traf" );
if( p_traf == NULL)
{
msg_Warn( p_demux, "no traf box found!" );
return VLC_EGENERIC;
}
MP4_Box_t *p_tfhd = MP4_BoxGet( p_traf, "tfhd" );
if( p_tfhd == NULL)
{
msg_Warn( p_demux, "no tfhd box found!" );
return VLC_EGENERIC;
}
uint32_t i_track_ID = BOXDATA(p_tfhd)->i_track_ID;
*i_tk_id = i_track_ID;
assert( i_track_ID > 0 );
msg_Dbg( p_demux, "GetChunk: track ID is %"PRIu32"", i_track_ID );
mp4_track_t *p_track = MP4_frg_GetTrackByID( p_demux, i_track_ID );
if( !p_track )
return VLC_EGENERIC;
mp4_chunk_t *ret = p_track->cchunk;
if( BOXDATA(p_tfhd)->b_empty )
msg_Warn( p_demux, "No samples in this chunk!" );
/* Usually we read 100 ms of each track. However, suppose we have two tracks,
* Ta and Tv (audio and video). Suppose also that Ta is the first track to be
* read, i.e. we read 100 ms of Ta, then 100 ms of Tv, then 100 ms of Ta,
* and so on. Finally, suppose that we get the chunks the other way around,
* i.e. first a chunk of Tv, then a chunk of Ta, then a chunk of Tv, and so on.
* In that case, it is very likely that at some point, Ta->cchunk or Tv->cchunk
* is not emptied when MP4_frg_GetChunks is called. It is therefore necessary to
* flush it, i.e. send to the decoder the samples not yet sent.
* Note that all the samples to be flushed should worth less than 100 ms,
* (though I did not do the formal proof) and thus this flushing mechanism
* should not cause A/V sync issues, or delays or whatever.
*/
if( ret->i_sample < ret->i_sample_count )
FlushChunk( p_demux, p_track );
if( ret->i_sample_count )
FreeAndResetChunk( ret );
uint32_t default_duration = 0;
if( BOXDATA(p_tfhd)->i_flags & MP4_TFHD_DFLT_SAMPLE_DURATION )
default_duration = BOXDATA(p_tfhd)->i_default_sample_duration;
uint32_t default_size = 0;
if( BOXDATA(p_tfhd)->i_flags & MP4_TFHD_DFLT_SAMPLE_SIZE )
default_size = BOXDATA(p_tfhd)->i_default_sample_size;
MP4_Box_t *p_trun = MP4_BoxGet( p_traf, "trun");
if( p_trun == NULL)
{
msg_Warn( p_demux, "no trun box found!" );
return VLC_EGENERIC;
}
MP4_Box_data_trun_t *p_trun_data = p_trun->data.p_trun;
ret->i_sample_count = p_trun_data->i_sample_count;
assert( ret->i_sample_count > 0 );
ret->i_sample_description_index = 1; /* seems to be always 1, is it? */
ret->i_sample_first = p_track->i_sample_first;
p_track->i_sample_first += ret->i_sample_count;
ret->i_first_dts = p_track->i_first_dts;
/* XXX I already saw DASH content with no default_duration and no
* MP4_TRUN_SAMPLE_DURATION flag, but a sidx box was present.
* This chunk of code might be buggy with segments having
* more than one subsegment. */
if( !default_duration )
{
MP4_Box_t *p_trex = MP4_GetTrexByTrackID( p_moof, i_track_ID );
if ( p_trex )
default_duration = BOXDATA(p_trex)->i_default_sample_duration;
else if( p_sidx )
{
MP4_Box_data_sidx_t *p_sidx_data = BOXDATA(p_sidx);
assert( p_sidx_data->i_reference_count == 1 );
if( p_sidx_data->i_timescale == 0 )
return VLC_EGENERIC;
unsigned i_chunk_duration = p_sidx_data->p_items[0].i_subsegment_duration /
p_sidx_data->i_timescale;
default_duration = i_chunk_duration * p_track->i_timescale / ret->i_sample_count;
}
}
msg_Dbg( p_demux, "Default sample duration is %"PRIu32, default_duration );
ret->p_sample_count_dts = calloc( ret->i_sample_count, sizeof( uint32_t ) );
ret->p_sample_delta_dts = calloc( ret->i_sample_count, sizeof( uint32_t ) );
if( !ret->p_sample_count_dts || !ret->p_sample_delta_dts )
return VLC_ENOMEM;
ret->p_sample_count_pts = calloc( ret->i_sample_count, sizeof( uint32_t ) );
if( !ret->p_sample_count_pts )
return VLC_ENOMEM;
if( p_trun_data->i_flags & MP4_TRUN_SAMPLE_TIME_OFFSET )
{
ret->p_sample_offset_pts = calloc( ret->i_sample_count, sizeof( int32_t ) );
if( !ret->p_sample_offset_pts )
return VLC_ENOMEM;
}
ret->p_sample_size = calloc( ret->i_sample_count, sizeof( uint32_t ) );
if( !ret->p_sample_size )
return VLC_ENOMEM;
ret->p_sample_data = calloc( ret->i_sample_count, sizeof( uint8_t * ) );
if( !ret->p_sample_data )
return VLC_ENOMEM;
uint32_t dur = 0, i_mdatlen = 0, len;
uint32_t chunk_duration = 0, chunk_size = 0;
/* Skip header of mdat */
uint8_t mdat[8];
int i_read = stream_Read( p_demux->s, &mdat, 8 );
i_mdatlen = GetDWBE( mdat );
if ( i_read < 8 || i_mdatlen < 8 ||
VLC_FOURCC( mdat[4], mdat[5], mdat[6], mdat[7] ) != ATOM_mdat )
return VLC_EGENERIC;
for( uint32_t i = 0; i < ret->i_sample_count; i++)
{
if( p_trun_data->i_flags & MP4_TRUN_SAMPLE_DURATION )
dur = p_trun_data->p_samples[i].i_duration;
else
dur = default_duration;
ret->p_sample_delta_dts[i] = dur;
chunk_duration += dur;
ret->p_sample_count_dts[i] = ret->p_sample_count_pts[i] = 1;
if( ret->p_sample_offset_pts )
{
if ( p_trun_data->i_version == 0 )
ret->p_sample_offset_pts[i] = (int32_t) p_trun_data->p_samples[i].i_composition_time_offset;
else
ret->p_sample_offset_pts[i] = __MIN( INT32_MAX, p_trun_data->p_samples[i].i_composition_time_offset );
}
if( p_trun_data->i_flags & MP4_TRUN_SAMPLE_SIZE )
len = ret->p_sample_size[i] = p_trun_data->p_samples[i].i_size;
else
len = ret->p_sample_size[i] = default_size;
if ( chunk_size + len > ( i_mdatlen - 8 ) )
return VLC_EGENERIC;
ret->p_sample_data[i] = malloc( len );
if( ret->p_sample_data[i] == NULL )
return VLC_ENOMEM;
uint32_t i_read = stream_ReadU32( p_demux->s, ret->p_sample_data[i], len );
if( i_read < len )
return VLC_EGENERIC;
chunk_size += len;
}
ret->i_last_dts = ret->i_first_dts + chunk_duration - dur;
p_track->i_first_dts = chunk_duration + ret->i_first_dts;
if( p_track->b_codec_need_restart &&
p_track->fmt.i_cat == VIDEO_ES )
ReInitDecoder( p_demux, p_track );
/* Skip if we didn't reach the end of mdat box */
if ( chunk_size < (i_mdatlen - 8) )
stream_ReadU32( p_demux->s, NULL, i_mdatlen - chunk_size - 8 );
p_track->b_has_non_empty_cchunk = true;
return VLC_SUCCESS;
}
/**
* Get the next chunk of the track identified by i_tk_id.
* \Note We don't want to seek all the time, so if the first chunk given by the
* input method doesn't belong to the right track, we don't throw it away,
* and so, in general, this function fetch more than one chunk.
* Not to mention that a new init fragment might be put everywhere
* between two chunks by the input method.
*/
static int MP4_frg_GetChunks( demux_t *p_demux, const unsigned i_tk_id )
{
demux_sys_t *p_sys = p_demux->p_sys;
mp4_track_t *p_track;
for( unsigned i = 0; i < p_sys->i_tracks; i++ )
{
MP4_Box_t *p_chunk = MP4_BoxGetNextChunk( p_demux->s );
if( !p_chunk )
return VLC_EGENERIC;
if( !p_chunk->p_first )
goto MP4_frg_GetChunks_Error;
uint32_t i_type = p_chunk->p_first->i_type;
uint32_t tid = 0;
if( i_type == ATOM_uuid || i_type == ATOM_ftyp )
{
MP4_BoxFree( p_demux->s, p_sys->p_root );
p_sys->p_root = p_chunk;
if( i_type == ATOM_ftyp ) /* DASH */
{
MP4_Box_t *p_tkhd = MP4_BoxGet( p_chunk, "/moov/trak[0]/tkhd" );
if( !p_tkhd )
{
msg_Warn( p_demux, "No tkhd found!" );
goto MP4_frg_GetChunks_Error;
}
tid = p_tkhd->data.p_tkhd->i_track_ID;
}
else /* Smooth Streaming */
{
assert( !CmpUUID( &p_chunk->p_first->i_uuid, &SmooBoxUUID ) );
MP4_Box_t *p_stra = MP4_BoxGet( p_chunk, "/uuid/uuid[0]" );
if( !p_stra || CmpUUID( &p_stra->i_uuid, &StraBoxUUID ) )
{
msg_Warn( p_demux, "No StraBox found!" );
goto MP4_frg_GetChunks_Error;
}
tid = p_stra->data.p_stra->i_track_ID;
}
p_track = MP4_frg_GetTrackByID( p_demux, tid );
if( !p_track )
goto MP4_frg_GetChunks_Error;
p_track->b_codec_need_restart = true;
return MP4_frg_GetChunks( p_demux, i_tk_id );
}
if( MP4_frg_GetChunk( p_demux, p_chunk, &tid ) != VLC_SUCCESS )
goto MP4_frg_GetChunks_Error;
MP4_BoxFree( p_demux->s, p_chunk );
if( tid == i_tk_id )
break;
else
continue;
MP4_frg_GetChunks_Error:
MP4_BoxFree( p_demux->s, p_chunk );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
static int MP4_frg_TrackSelect( demux_t *p_demux, mp4_track_t *p_track )
{
if( !p_track->b_ok || p_track->b_chapter )
{
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;
}
msg_Dbg( p_demux, "Select track id %u", p_track->i_track_ID );
p_track->b_selected = true;
return VLC_SUCCESS;
}
/**
* DemuxFrg: read packet and send them to decoders
* \return 1 on success, 0 on error.
* TODO check for newly selected track
*/
int DemuxFrg( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
unsigned i_track;
unsigned 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];
bool b;
if( !tk->b_ok || tk->b_chapter )
continue;
es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
msg_Dbg( p_demux, "track %u %s!", tk->i_track_ID, b ? "enabled" : "disabled" );
if( tk->b_selected && !b )
{
MP4_TrackUnselect( p_demux, tk );
}
else if( !tk->b_selected && b)
{
MP4_frg_TrackSelect( p_demux, tk );
}
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 = CLOCK_FREQ *
(mtime_t)p_sys->moovfragment.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, VLC_TS_0 + p_sys->i_pcr );
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_chapter || !tk->b_selected )
{
msg_Warn( p_demux, "Skipping track id %u", tk->i_track_ID );
continue;
}
if( !tk->b_has_non_empty_cchunk )
{
if( MP4_frg_GetChunks( p_demux, tk->i_track_ID ) != VLC_SUCCESS )
{
msg_Info( p_demux, "MP4_frg_GetChunks returned error. End of stream?" );
return 0;
}
}
while( MP4_TrackGetDTS( p_demux, tk ) < MP4_GetMoviePTS( p_sys ) )
{
block_t *p_block;
int64_t i_delta;
mp4_chunk_t *ck = tk->cchunk;
if( ck->i_sample >= ck->i_sample_count )
{
msg_Err( p_demux, "sample %"PRIu32" of %"PRIu32"",
ck->i_sample, ck->i_sample_count );
return 0;
}
uint32_t sample_size = ck->p_sample_size[ck->i_sample];
p_block = block_Alloc( sample_size );
uint8_t *src = ck->p_sample_data[ck->i_sample];
memcpy( p_block->p_buffer, src, sample_size );
ck->i_sample++;
if( ck->i_sample == ck->i_sample_count )
tk->b_has_non_empty_cchunk = false;
/* dts */
p_block->i_dts = VLC_TS_0 + MP4_TrackGetDTS( p_demux, tk );
/* pts */
i_delta = MP4_TrackGetPTSDelta( p_demux, tk );
if( i_delta != -1 )
p_block->i_pts = p_block->i_dts + i_delta;
else if( tk->fmt.i_cat != VIDEO_ES )
p_block->i_pts = p_block->i_dts;
else
p_block->i_pts = VLC_TS_INVALID;
MP4_Block_Send( p_demux, tk, p_block );
tk->i_sample++;
if( !tk->b_has_non_empty_cchunk )
break;
}
}
return 1;
}
static MP4_Box_t * LoadNextChunk( demux_t *p_demux )
{
/* Read Next Chunk */
MP4_Box_t *p_chunk = MP4_BoxGetNextChunk( p_demux->s );
if( !p_chunk )
{
msg_Warn( p_demux, "no next chunk" );
return NULL;
}
if( !p_chunk->p_first )
{
msg_Warn( p_demux, "no next chunk child" );
return NULL;
}
return p_chunk;
}
static bool BoxExistsInRootTree( MP4_Box_t *p_root, uint32_t i_type, off_t i_pos )
{
while ( p_root )
{
if ( p_root->i_pos == i_pos )
{
assert( i_type == p_root->i_type );
break;
}
p_root = p_root->p_next;
}
return (p_root != NULL);
}
/* Keeps an ordered chain of all fragments */
static bool AddFragment( demux_t *p_demux, MP4_Box_t *p_moox )
{
demux_sys_t *p_sys = p_demux->p_sys;
mp4_fragment_t *p_base_fragment = & p_sys->moovfragment;
if ( !p_moox )
return false;
if( p_moox->i_type == ATOM_moov )
{
if ( !p_sys->moovfragment.p_moox )
{
p_sys->moovfragment.p_moox = p_moox;
MP4_Box_t *p_mvhd;
if( (p_mvhd = MP4_BoxGet( p_moox, "mvhd" )) )
{
p_sys->i_timescale = BOXDATA(p_mvhd)->i_timescale;
p_sys->i_overall_duration = BOXDATA(p_mvhd)->i_duration;
}
if ( MP4_BoxCount( p_moox, "mvex" ) || !p_mvhd )
{ /* duration might be wrong an be set to whole duration :/ */
p_sys->moovfragment.i_duration = 0;
MP4_Box_t *p_tkhd;
MP4_Box_t *p_trak = MP4_BoxGet( p_moox, "trak" );
while( p_trak )
{
if ( p_trak->i_type == ATOM_trak && (p_tkhd = MP4_BoxGet( p_trak, "tkhd" )) )
{
if ( BOXDATA(p_tkhd)->i_duration > p_sys->moovfragment.i_duration )
p_sys->moovfragment.i_duration = BOXDATA(p_tkhd)->i_duration;
}
p_trak = p_trak->p_next;
}
}
msg_Dbg( p_demux, "added fragment %4.4s", (char*) &p_moox->i_type );
return true;
}
return false;
}
else // p_moox->i_type == ATOM_moof
{
assert(p_moox->i_type == ATOM_moof);
mp4_fragment_t *p_fragment = p_sys->moovfragment.p_next;
while ( p_fragment )
{
if ( !p_base_fragment->p_moox || p_moox->i_pos > p_base_fragment->p_moox->i_pos )
{
p_base_fragment = p_fragment;
p_fragment = p_fragment->p_next;
}
else if ( p_moox->i_pos == p_base_fragment->p_moox->i_pos )
{
/* already exists */
return false;
}
}
}
/* Add the moof fragment */
mp4_fragment_t *p_new = malloc(sizeof(mp4_fragment_t));
if ( !p_new ) return false;
p_new->p_moox = p_moox;
p_new->i_duration = 0;
p_new->p_next = p_base_fragment->p_next;
p_base_fragment->p_next = p_new;
msg_Dbg( p_demux, "added fragment %4.4s", (char*) &p_moox->i_type );
/* we have to probe all fragments :/ */
uint64_t i_traf_base_data_offset = 0;
uint64_t i_traf_min_offset = 0;
uint32_t i_traf = 0;
uint32_t i_traf_total_size = 0;
uint32_t i_trafs_total_size = 0;
MP4_Box_t *p_traf = MP4_BoxGet( p_new->p_moox, "traf" );
while ( p_traf )
{
if ( p_traf->i_type != ATOM_traf )
{
p_traf = p_traf->p_next;
continue;
}
const MP4_Box_t *p_tfhd = MP4_BoxGet( p_traf, "tfhd" );
const MP4_Box_t *p_trun = MP4_BoxGet( p_traf, "trun" );
if ( !p_tfhd || !p_trun )
{
p_traf = p_traf->p_next;
continue;
}
uint32_t i_track_timescale = 0;
uint32_t i_track_defaultsamplesize = 0;
uint32_t i_track_defaultsampleduration = 0;
if ( p_sys->b_smooth )
{
/* stra sets identical timescales */
i_track_timescale = p_sys->i_timescale;
i_track_defaultsamplesize = 1;
i_track_defaultsampleduration = 1;
}
else
{
/* set trex for defaults */
MP4_Box_t *p_trex = MP4_GetTrexByTrackID( p_sys->moovfragment.p_moox, BOXDATA(p_tfhd)->i_track_ID );
if ( p_trex )
{
i_track_defaultsamplesize = BOXDATA(p_trex)->i_default_sample_size;
i_track_defaultsampleduration = BOXDATA(p_trex)->i_default_sample_duration;
}
MP4_Box_t *p_trak = MP4_GetTrakByTrackID( p_sys->moovfragment.p_moox, BOXDATA(p_tfhd)->i_track_ID );
if ( p_trak )
{
MP4_Box_t *p_mdhd = MP4_BoxGet( p_trak, "mdia/mdhd" );
if ( p_mdhd ) i_track_timescale = BOXDATA(p_mdhd)->i_timescale;
}
}
if ( !i_track_timescale )
{
p_traf = p_traf->p_next;
continue;
}
if ( BOXDATA(p_tfhd)->i_flags & MP4_TFHD_BASE_DATA_OFFSET )
{
i_traf_base_data_offset = BOXDATA(p_tfhd)->i_base_data_offset;
}
else if ( BOXDATA(p_tfhd)->i_flags & MP4_TFHD_DEFAULT_BASE_IS_MOOF )
{
i_traf_base_data_offset = p_new->p_moox->i_pos /* + 8*/;
}
else
{
if ( i_traf == 0 )
i_traf_base_data_offset = p_new->p_moox->i_pos /*+ 8*/;
else
i_traf_base_data_offset += i_traf_total_size;
}
i_traf_total_size = 0;
uint64_t i_trun_data_offset = i_traf_base_data_offset;
uint64_t i_traf_duration = 0;
uint32_t i_trun_size = 0;
while ( p_trun && p_tfhd )
{
if ( p_trun->i_type != ATOM_trun )
{
p_trun = p_trun->p_next;
continue;
}
const MP4_Box_data_trun_t *p_trundata = p_trun->data.p_trun;
/* Get data offset */
if ( p_trundata->i_flags & MP4_TRUN_DATA_OFFSET )
i_trun_data_offset += __MAX( p_trundata->i_data_offset, 0 );
else
i_trun_data_offset += i_trun_size;
i_trun_size = 0;
/* Sum total time */
if ( p_trundata->i_flags & MP4_TRUN_SAMPLE_DURATION )
{
for( uint32_t i=0; i< p_trundata->i_sample_count; i++ )
i_traf_duration += p_trundata->p_samples[i].i_duration;
}
else if ( BOXDATA(p_tfhd)->i_flags & MP4_TFHD_DFLT_SAMPLE_DURATION )
{
i_traf_duration += p_trundata->i_sample_count *
BOXDATA(p_tfhd)->i_default_sample_duration;
}
else
{
i_traf_duration += p_trundata->i_sample_count *
i_track_defaultsampleduration;
}
/* Get total traf size */
if ( p_trundata->i_flags & MP4_TRUN_SAMPLE_SIZE )
{
for( uint32_t i=0; i< p_trundata->i_sample_count; i++ )
i_trun_size += p_trundata->p_samples[i].i_size;
}
else if ( BOXDATA(p_tfhd)->i_flags & MP4_TFHD_DFLT_SAMPLE_SIZE )
{
i_trun_size += p_trundata->i_sample_count *
BOXDATA(p_tfhd)->i_default_sample_size;
}
else
{
i_trun_size += p_trundata->i_sample_count *
i_track_defaultsamplesize;
}
i_traf_total_size += i_trun_size;
if ( i_traf_min_offset )
i_traf_min_offset = __MIN( i_trun_data_offset, i_traf_min_offset );
else
i_traf_min_offset = i_trun_data_offset;
p_trun = p_trun->p_next;
}
i_trafs_total_size += i_traf_total_size;
p_new->i_duration = __MAX( p_new->i_duration, i_traf_duration * p_sys->i_timescale / i_track_timescale );
p_traf = p_traf->p_next;
i_traf++;
}
p_new->i_chunk_range_min_offset = i_traf_min_offset;
p_new->i_chunk_range_max_offset = i_traf_min_offset + i_trafs_total_size;
msg_Dbg( p_demux, "new fragment is %"PRId64" %"PRId64, p_new->i_chunk_range_min_offset, p_new->i_chunk_range_max_offset );
/* compute total duration with that new fragment if no overall provided */
MP4_Box_t *p_mehd = MP4_BoxGet( p_sys->moovfragment.p_moox, "mvex/mehd");
if ( !p_mehd )
{
p_sys->i_overall_duration = 0;
if ( p_sys->b_fragments_probed )
{
p_new = &p_sys->moovfragment;
while ( p_new )
{
p_sys->i_overall_duration += p_new->i_duration;
p_new = p_new->p_next;
}
}
}
else
p_sys->i_overall_duration = BOXDATA(p_mehd)->i_fragment_duration;
msg_Dbg( p_demux, "total fragments duration %"PRId64, CLOCK_FREQ * p_sys->i_overall_duration / p_sys->i_timescale);
return true;
}
static int ProbeIndex( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
uint64_t i_backup_pos, i_stream_size;
uint8_t mfro[MP4_MFRO_BOXSIZE];
assert( p_sys->b_seekable );
if ( MP4_BoxCount( p_sys->p_root, "/mfra" ) )
return VLC_SUCCESS;
i_stream_size = stream_Size( p_demux->s );
if ( ( i_stream_size >> 62 ) ||
( i_stream_size < MP4_MFRO_BOXSIZE ) ||
( !MP4_stream_Tell( p_demux->s, &i_backup_pos ) ) ||
( stream_Seek( p_demux->s, i_stream_size - MP4_MFRO_BOXSIZE ) != VLC_SUCCESS )
)
{
msg_Dbg( p_demux, "Probing tail for mfro has failed" );
return VLC_EGENERIC;
}
if ( stream_Read( p_demux->s, &mfro, MP4_MFRO_BOXSIZE ) == MP4_MFRO_BOXSIZE &&
VLC_FOURCC(mfro[4],mfro[5],mfro[6],mfro[7]) == ATOM_mfro &&
GetDWBE( &mfro ) == MP4_MFRO_BOXSIZE )
{
uint32_t i_offset = GetDWBE( &mfro[12] );
msg_Dbg( p_demux, "will read mfra index at %"PRIu64, i_stream_size - i_offset );
if ( i_stream_size > i_offset &&
stream_Seek( p_demux->s, i_stream_size - i_offset ) == VLC_SUCCESS )
{
msg_Dbg( p_demux, "reading mfra index at %"PRIu64, i_stream_size - i_offset );
MP4_ReadBoxContainerChildren( p_demux->s, p_sys->p_root, ATOM_mfra );
}
}
return stream_Seek( p_demux->s, i_backup_pos );
}
static int ProbeFragments( demux_t *p_demux, bool b_force )
{
demux_sys_t *p_sys = p_demux->p_sys;
uint64_t i_current_pos;
if ( MP4_stream_Tell( p_demux->s, &i_current_pos ) )
msg_Dbg( p_demux, "probing fragments from %"PRId64, i_current_pos );
assert( p_sys->p_root );
if ( p_sys->b_fastseekable || b_force )
{
MP4_ReadBoxContainerChildren( p_demux->s, p_sys->p_root, 0 ); /* Get the rest of the file */
p_sys->b_fragments_probed = true;
}
else
{
/* We stop at first moof, which validates our fragmentation condition
* and we'll find others while reading. */
MP4_ReadBoxContainerChildren( p_demux->s, p_sys->p_root, ATOM_moof );
}
if ( !p_sys->moovfragment.p_moox )
{
MP4_Box_t *p_moov = MP4_BoxGet( p_sys->p_root, "/moov" );
if ( !p_moov )
{
/* moov/mvex before probing should be present anyway */
MP4_BoxDumpStructure( p_demux->s, p_sys->p_root );
return VLC_EGENERIC;
}
AddFragment( p_demux, p_moov );
}
MP4_Box_t *p_moof = MP4_BoxGet( p_sys->p_root, "moof" );
while ( p_moof )
{
if ( p_moof->i_type == ATOM_moof )
AddFragment( p_demux, p_moof );
p_moof = p_moof->p_next;
}
MP4_Box_t *p_mdat = MP4_BoxGet( p_sys->p_root, "mdat" );
if ( p_mdat )
{
stream_Seek( p_demux->s, p_mdat->i_pos );
msg_Dbg( p_demux, "rewinding to mdat %"PRId64, p_mdat->i_pos );
}
return VLC_SUCCESS;
}
static mp4_fragment_t * GetFragmentByPos( demux_t *p_demux, uint64_t i_pos, bool b_exact )
{
mp4_fragment_t *p_fragment = &p_demux->p_sys->moovfragment;
while ( p_fragment )
{
if ( i_pos <= p_fragment->i_chunk_range_max_offset &&
( !b_exact || i_pos >= p_fragment->i_chunk_range_min_offset ) )
{
msg_Dbg( p_demux, "fragment matched %"PRIu64" << %"PRIu64" << %"PRIu64,
p_fragment->i_chunk_range_min_offset, i_pos,
p_fragment->i_chunk_range_max_offset );
return p_fragment;
}
else
{
p_fragment = p_fragment->p_next;
}
}
return NULL;
}
/* Get a matching fragment data start by clock time */
static mp4_fragment_t * GetFragmentByTime( demux_t *p_demux, const mtime_t i_time )
{
mp4_fragment_t *p_fragment = &p_demux->p_sys->moovfragment;
mtime_t i_base_time = 0;
while ( p_fragment )
{
mtime_t i_length = CLOCK_FREQ * p_fragment->i_duration / p_demux->p_sys->i_timescale;
if ( i_time >= i_base_time &&
i_time <= i_base_time + i_length )
{
return p_fragment;
}
else
{
i_base_time += i_length;
p_fragment = p_fragment->p_next;
}
if ( !p_demux->p_sys->b_fragments_probed )
return NULL; /* We have no way to guess missing fragments time */
}
return NULL;
}
/* Returns fragment scaled time offset */
static mtime_t LeafGetFragmentTimeOffset( demux_t *p_demux, mp4_fragment_t *p_fragment )
{
mtime_t i_base_scaledtime = 0;
mp4_fragment_t *p_current = &p_demux->p_sys->moovfragment;
while ( p_current != p_fragment )
{
i_base_scaledtime += p_current->i_duration;
p_current = p_current->p_next;
}
return i_base_scaledtime;
}
static int LeafParseTRUN( demux_t *p_demux, mp4_track_t *p_track,
const uint32_t i_defaultduration, const uint32_t i_defaultsize,
const MP4_Box_data_trun_t *p_trun, uint32_t * const pi_mdatlen )
{
assert( p_trun->i_sample_count );
msg_Dbg( p_demux, "Default sample duration %"PRIu32" size %"PRIu32" firstdts %"PRIu64,
i_defaultduration, i_defaultsize, p_track->i_first_dts );
uint32_t dur = 0, len;
uint32_t chunk_size = 0;
mtime_t i_nzdts = CLOCK_FREQ * p_track->i_time / p_track->i_timescale;
mtime_t i_nzpts;
for( uint32_t i = 0; i < p_trun->i_sample_count; i++)
{
i_nzdts += CLOCK_FREQ * dur / p_track->i_timescale;
i_nzpts = i_nzdts;
if( p_trun->i_flags & MP4_TRUN_SAMPLE_DURATION )
dur = p_trun->p_samples[i].i_duration;
else
dur = i_defaultduration;
p_track->i_time += dur;
if( p_trun->i_flags & MP4_TRUN_SAMPLE_TIME_OFFSET )
{
if ( p_trun->i_version == 0 )
i_nzpts += CLOCK_FREQ * (int32_t) p_trun->p_samples[i].i_composition_time_offset / p_track->i_timescale;
else
i_nzpts += CLOCK_FREQ * p_trun->p_samples[i].i_composition_time_offset / p_track->i_timescale;
}
if( p_trun->i_flags & MP4_TRUN_SAMPLE_SIZE )
len = p_trun->p_samples[i].i_size;
else
len = i_defaultsize;
assert( dur ); /* dur, dur ! */
assert( len );
if ( chunk_size + len > *pi_mdatlen )
{
/* update data left in mdat */
*pi_mdatlen -= chunk_size;
return VLC_EGENERIC;
}
block_t *p_block = MP4_Block_Read( p_demux, p_track, __MIN( len, INT32_MAX ) );
uint32_t i_read = ( p_block ) ? p_block->i_buffer : 0;
if( i_read < len )
{
/* update data left in mdat */
*pi_mdatlen -= chunk_size;
*pi_mdatlen -= i_read;
free( p_block );
return VLC_EGENERIC;
}
if ( p_demux->p_sys->i_pcr < VLC_TS_0 )
{
p_demux->p_sys->i_pcr = i_nzdts;
es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + i_nzdts );
}
if ( p_track->p_es )
{
p_block->i_dts = VLC_TS_0 + i_nzdts;
p_block->i_pts = VLC_TS_0 + i_nzpts;
p_block->i_length = CLOCK_FREQ * dur / p_track->i_timescale;
MP4_Block_Send( p_demux, p_track, p_block );
}
else free( p_block );
chunk_size += len;
}
/* update data left in mdat */
*pi_mdatlen -= chunk_size;
return VLC_SUCCESS;
}
static int LeafGetTrackAndChunkByMOOVPos( demux_t *p_demux, uint64_t *pi_pos,
mp4_track_t **pp_tk, unsigned int *pi_chunk )
{
const demux_sys_t *p_sys = p_demux->p_sys;
mp4_track_t *p_tk_closest = NULL;
uint64_t i_closest = UINT64_MAX;
unsigned int i_chunk_closest;
*pp_tk = NULL;
for ( unsigned int i_track = 0; i_track < p_sys->i_tracks; i_track++ )
{
for( unsigned int i_chunk = 0; i_chunk < p_sys->track[i_track].i_chunk_count; i_chunk++ )
{
if ( p_sys->track[i_track].chunk[i_chunk].i_offset > *pi_pos )
{
i_closest = __MIN( i_closest, p_sys->track[i_track].chunk[i_chunk].i_offset );
p_tk_closest = &p_sys->track[i_track];
i_chunk_closest = i_chunk;
}
if ( *pi_pos == p_sys->track[i_track].chunk[i_chunk].i_offset )
{
*pp_tk = &p_sys->track[i_track];
*pi_chunk = i_chunk;
return VLC_SUCCESS;
}
}
}
if ( i_closest != UINT64_MAX )
{
*pi_pos = i_closest;
*pp_tk = p_tk_closest;
*pi_chunk = i_chunk_closest;
return VLC_ENOOBJ;
}
else return VLC_EGENERIC;
}
static int LeafMOOVGetSamplesSize( const mp4_track_t *p_track, const uint32_t i_sample,
uint32_t *pi_samplestoread, uint32_t *pi_samplessize,
const uint32_t i_maxbytes, const uint32_t i_maxsamples )
{
MP4_Box_t *p_stsz = MP4_BoxGet( p_track->p_stbl, "stsz" );
if ( !p_stsz )
return VLC_EGENERIC;
if ( BOXDATA(p_stsz)->i_sample_size == 0 )
{
uint32_t i_entry = i_sample;
uint32_t i_totalbytes = 0;
*pi_samplestoread = 1;
if ( i_sample >= BOXDATA(p_stsz)->i_sample_count )
return VLC_EGENERIC;
*pi_samplessize = BOXDATA(p_stsz)->i_entry_size[i_sample];
i_totalbytes += *pi_samplessize;
if ( *pi_samplessize > i_maxbytes )
return VLC_EGENERIC;
i_entry++;
while( i_entry < BOXDATA(p_stsz)->i_sample_count &&
*pi_samplessize == BOXDATA(p_stsz)->i_entry_size[i_entry] &&
i_totalbytes + *pi_samplessize < i_maxbytes &&
*pi_samplestoread < i_maxsamples
)
{
i_totalbytes += *pi_samplessize;
(*pi_samplestoread)++;
}
*pi_samplessize = i_totalbytes;
}
else
{
/* all samples have same size */
*pi_samplessize = BOXDATA(p_stsz)->i_sample_size;
*pi_samplestoread = __MIN( i_maxsamples, BOXDATA(p_stsz)->i_sample_count );
*pi_samplestoread = __MIN( i_maxbytes / *pi_samplessize, *pi_samplestoread );
*pi_samplessize = *pi_samplessize * *pi_samplestoread;
}
return VLC_SUCCESS;
}
static inline mtime_t LeafGetMOOVTimeInChunk( const mp4_chunk_t *p_chunk, uint32_t i_sample )
{
mtime_t i_time = 0;
uint32_t i_index = 0;
while( i_sample > 0 )
{
if( i_sample > p_chunk->p_sample_count_dts[i_index] )
{
i_time += p_chunk->p_sample_count_dts[i_index] *
p_chunk->p_sample_delta_dts[i_index];
i_sample -= p_chunk->p_sample_count_dts[i_index];
i_index++;
}
else
{
i_time += i_sample * p_chunk->p_sample_delta_dts[i_index];
break;
}
}
return i_time;
}
static int LeafParseMDATwithMOOV( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
assert( p_sys->context.i_current_box_type == ATOM_mdat );
assert( p_sys->context.p_fragment->p_moox->i_type == ATOM_moov );
uint64_t i_current_pos;
if ( !MP4_stream_Tell( p_demux->s, &i_current_pos ) )
return VLC_EGENERIC;
if ( p_sys->context.i_mdatbytesleft == 0 ) /* Start parsing new mdat */
{
/* Ready mdat section */
uint8_t mdat[8];
int i_read = stream_Read( p_demux->s, &mdat, 8 );
p_sys->context.i_mdatbytesleft = GetDWBE( mdat );
if ( i_read < 8 || p_sys->context.i_mdatbytesleft < 8 ||
VLC_FOURCC( mdat[4], mdat[5], mdat[6], mdat[7] ) != ATOM_mdat )
{
uint64_t i_pos;
if ( !MP4_stream_Tell( p_demux->s, &i_pos ) )
msg_Err( p_demux, "No mdat atom at %"PRIu64, i_pos - __MAX( 0, i_read ) );
return VLC_EGENERIC;
}
i_current_pos += 8;
p_sys->context.i_mdatbytesleft -= 8;
}
while( p_sys->context.i_mdatbytesleft > 0 )
{
mp4_track_t *p_track;
unsigned int i_chunk;
/**/
uint64_t i_pos = i_current_pos;
int i_ret = LeafGetTrackAndChunkByMOOVPos( p_demux, &i_pos, &p_track, &i_chunk );
if ( i_ret == VLC_EGENERIC )
{
msg_Err(p_demux, "can't find referenced chunk for start at %"PRIu64, i_current_pos );
goto error;
}
else if( i_ret == VLC_ENOOBJ )
{
assert( i_pos - i_current_pos > p_sys->context.i_mdatbytesleft );
int i_read = stream_Read( p_demux->s, NULL, i_pos - i_current_pos );
i_current_pos += i_read;
p_sys->context.i_mdatbytesleft -= i_read;
if ( i_read == 0 ) goto error;
continue;
}
/**/
mp4_chunk_t *p_chunk = &p_track->chunk[i_chunk];
uint32_t i_nb_samples_at_chunk_start = p_chunk->i_sample_first;
uint32_t i_nb_samples_in_chunk = p_chunk->i_sample_count;
assert(i_nb_samples_in_chunk);
uint32_t i_nb_samples = 0;
while ( i_nb_samples < i_nb_samples_in_chunk )
{
uint32_t i_samplessize = 0;
uint32_t i_samplescounttoread = 0;
i_ret = LeafMOOVGetSamplesSize( p_track,
i_nb_samples_at_chunk_start + i_nb_samples,
&i_samplescounttoread, &i_samplessize,
p_sys->context.i_mdatbytesleft,
/*i_nb_samples_in_chunk - i_nb_samples*/ 1 );
if ( i_ret != VLC_SUCCESS )
goto error;
if( p_sys->context.i_mdatbytesleft &&
p_sys->context.i_mdatbytesleft >= i_samplessize )
{
block_t *p_block;
/* now read pes */
if( !(p_block = MP4_Block_Read( p_demux, p_track, i_samplessize )) )
{
uint64_t i_pos;
if ( MP4_stream_Tell( p_demux->s, &i_pos ) )
{
p_sys->context.i_mdatbytesleft -= ( i_pos - i_current_pos );
msg_Err( p_demux, "stream block error %"PRId64" %"PRId64, i_pos, i_pos - i_current_pos );
}
goto error;
}
i_nb_samples += i_samplescounttoread;
i_current_pos += i_samplessize;
p_sys->context.i_mdatbytesleft -= i_samplessize;
/* dts */
mtime_t i_time = LeafGetMOOVTimeInChunk( p_chunk, i_nb_samples );
i_time += p_chunk->i_first_dts;
p_track->i_time = i_time;
p_block->i_dts = VLC_TS_0 + CLOCK_FREQ * i_time / p_track->i_timescale;
/* pts */
int64_t i_delta = MP4_TrackGetPTSDelta( p_demux, p_track );
if( i_delta != -1 )
p_block->i_pts = p_block->i_dts + i_delta;
else if( p_track->fmt.i_cat != VIDEO_ES )
p_block->i_pts = p_block->i_dts;
else
p_block->i_pts = VLC_TS_INVALID;
MP4_Block_Send( p_demux, p_track, p_block );
if ( p_demux->p_sys->i_pcr < VLC_TS_0 )
{
p_sys->i_time = p_track->i_time * p_sys->i_timescale / p_track->i_timescale;
p_demux->p_sys->i_pcr = MP4_GetMoviePTS( p_demux->p_sys );
es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + p_demux->p_sys->i_pcr );
}
}
else
{
// sample size > left bytes
break;
}
p_track->i_sample += i_samplescounttoread;
}
/* flag end of mdat section if needed */
if ( p_sys->context.i_mdatbytesleft == 0 )
p_sys->context.i_current_box_type = 0;
// next chunk
return VLC_SUCCESS;
}
error:
/* Skip if we didn't reach the end of mdat box */
if ( p_sys->context.i_mdatbytesleft > 0 )
{
msg_Err( p_demux, "mdat had still %"PRIu32" bytes unparsed as samples",
p_sys->context.i_mdatbytesleft );
stream_ReadU32( p_demux->s, NULL, p_sys->context.i_mdatbytesleft );
}
p_sys->context.i_current_box_type = 0;
return VLC_SUCCESS;
}
static mp4_track_t * LeafGetTrackByTrunPos( demux_t *p_demux, const uint64_t i_pos, const uint64_t i_moofpos )
{
demux_sys_t *p_sys = p_demux->p_sys;
for ( uint32_t i=0; i<p_sys->i_tracks; i++ )
{
mp4_track_t *p_track = &p_sys->track[i];
if ( !p_track->context.p_trun || !p_track->context.p_tfhd )
continue;
const MP4_Box_data_trun_t *p_trun_data = p_track->context.BOXDATA(p_trun);
uint64_t i_offset = 0;
if ( p_track->context.BOXDATA(p_tfhd)->i_flags & MP4_TFHD_BASE_DATA_OFFSET )
i_offset = p_track->context.BOXDATA(p_tfhd)->i_base_data_offset;
else
i_offset = i_moofpos;
//if ( p_track->context.BOXDATA(p_tfhd)->i_flags & MP4_TFHD_DEFAULT_BASE_IS_MOOF )
// i_offset += i_moofpos;
if (p_trun_data->i_flags & MP4_TRUN_DATA_OFFSET)
i_offset += p_trun_data->i_data_offset;
else
return p_track;
if ( i_offset == i_pos )
return p_track;
}
return NULL;
}
static int LeafMapTrafTrunContextes( demux_t *p_demux, MP4_Box_t *p_moof )
{
demux_sys_t *p_sys = p_demux->p_sys;
/* reset */
for ( uint32_t i=0; i<p_sys->i_tracks; i++ )
{
mp4_track_t *p_track = &p_sys->track[i];
p_track->context.p_tfhd = NULL;
p_track->context.p_traf = NULL;
p_track->context.p_trun = NULL;
}
if ( p_moof->i_type == ATOM_moov )
return VLC_SUCCESS;
MP4_Box_t *p_traf = MP4_BoxGet( p_moof, "traf" );
if( !p_traf )
{
msg_Warn( p_demux, "no traf box found!" );
return VLC_EGENERIC;
}
/* map contexts */
while ( p_traf )
{
if ( p_traf->i_type == ATOM_traf )
{
MP4_Box_t *p_tfhd = MP4_BoxGet( p_traf, "tfhd" );
for ( uint32_t i=0; p_tfhd && i<p_sys->i_tracks; i++ )
{
mp4_track_t *p_track = &p_sys->track[i];
if ( BOXDATA(p_tfhd)->i_track_ID == p_track->i_track_ID )
{
MP4_Box_t *p_trun = MP4_BoxGet( p_traf, "trun" );
if ( p_trun )
{
p_track->context.p_tfhd = p_tfhd;
p_track->context.p_traf = p_traf;
p_track->context.p_trun = p_trun;
}
p_tfhd = NULL; /* break loop */
}
}
}
p_traf = p_traf->p_next;
}
return VLC_SUCCESS;
}
static int LeafIndexGetMoofPosByTime( demux_t *p_demux, const mtime_t i_target_time,
uint64_t *pi_pos, mtime_t *pi_mooftime )
{
MP4_Box_t *p_tfra = MP4_BoxGet( p_demux->p_sys->p_root, "mfra/tfra" );
while ( p_tfra )
{
if ( p_tfra->i_type == ATOM_tfra )
{
int64_t i_pos = -1;
const MP4_Box_data_tfra_t *p_data = BOXDATA(p_tfra);
mp4_track_t *p_track = MP4_frg_GetTrackByID( p_demux, p_data->i_track_ID );
if ( p_track && (p_track->fmt.i_cat == AUDIO_ES || p_track->fmt.i_cat == VIDEO_ES) )
{
for ( uint32_t i = 0; i<p_data->i_number_of_entries; i += ( p_data->i_version == 1 ) ? 2 : 1 )
{
mtime_t i_time;
uint64_t i_offset;
if ( p_data->i_version == 1 )
{
i_time = *((uint64_t *)(p_data->p_time + i));
i_offset = *((uint64_t *)(p_data->p_moof_offset + i));
}
else
{
i_time = p_data->p_time[i];
i_offset = p_data->p_moof_offset[i];
}
if ( CLOCK_FREQ * i_time / p_track->i_timescale >= i_target_time )
{
if ( i_pos == -1 ) /* Not in this traf */
break;
*pi_pos = (uint64_t) i_pos;
*pi_mooftime = CLOCK_FREQ * i_time / p_track->i_timescale;
if ( p_track->fmt.i_cat == AUDIO_ES )
*pi_mooftime -= CLOCK_FREQ / p_track->fmt.audio.i_rate * p_data->p_sample_number[i];
else
*pi_mooftime -= CLOCK_FREQ / p_demux->p_sys->f_fps * p_data->p_sample_number[i];
return VLC_SUCCESS;
}
else
i_pos = i_offset;
}
}
}
p_tfra = p_tfra->p_next;
}
return VLC_EGENERIC;
}
static int LeafParseMDATwithMOOF( demux_t *p_demux, MP4_Box_t *p_moof )
{
demux_sys_t *p_sys = p_demux->p_sys;
uint64_t i_pos;
assert( p_moof->i_type == ATOM_moof );
assert( p_sys->context.i_current_box_type == ATOM_mdat );
if ( p_sys->context.i_mdatbytesleft == 0 )
{
int i_ret = LeafMapTrafTrunContextes( p_demux, p_moof );
if ( i_ret != VLC_SUCCESS )
return i_ret;
/* Ready mdat section */
uint8_t mdat[8];
int i_read = stream_Read( p_demux->s, &mdat, 8 );
p_sys->context.i_mdatbytesleft = GetDWBE( mdat );
if ( i_read < 8 || p_sys->context.i_mdatbytesleft < 8 ||
VLC_FOURCC( mdat[4], mdat[5], mdat[6], mdat[7] ) != ATOM_mdat )
{
if ( MP4_stream_Tell( p_demux->s, &i_pos ) )
msg_Err(p_demux, "No mdat atom at %"PRIu64, i_pos - i_read );
return VLC_EGENERIC;
}
p_sys->context.i_mdatbytesleft -= 8;
}
if ( !MP4_stream_Tell( p_demux->s, &i_pos ) )
return VLC_EGENERIC;
if ( p_sys->b_smooth )
i_pos -= p_moof->i_pos;
mp4_track_t *p_track = LeafGetTrackByTrunPos( p_demux, i_pos, p_moof->i_pos );
if( p_track )
{
MP4_Box_data_tfhd_t *p_tfhd_data = p_track->context.BOXDATA(p_tfhd);
uint32_t i_trun_sample_default_duration = 0;
uint32_t i_trun_sample_default_size = 0;
if ( p_track->context.p_trun )
{
/* Get defaults for this/these RUN */
if( p_tfhd_data->i_flags & MP4_TFHD_DFLT_SAMPLE_DURATION )
i_trun_sample_default_duration = p_tfhd_data->i_default_sample_duration;
if( p_tfhd_data->i_flags & MP4_TFHD_DFLT_SAMPLE_SIZE )
i_trun_sample_default_size = p_tfhd_data->i_default_sample_size;
if( !i_trun_sample_default_duration || !i_trun_sample_default_size )
{
MP4_Box_t *p_trex = MP4_BoxGet( p_demux->p_sys->p_root, "moov/mvex/trex");
if ( p_trex )
{
while( p_trex && BOXDATA(p_trex)->i_track_ID != p_tfhd_data->i_track_ID )
p_trex = p_trex->p_next;
if ( p_trex && !i_trun_sample_default_duration )
i_trun_sample_default_duration = BOXDATA(p_trex)->i_default_sample_duration;
if ( p_trex && !i_trun_sample_default_size )
i_trun_sample_default_size = BOXDATA(p_trex)->i_default_sample_size;
}
}
const MP4_Box_data_trun_t *p_trun_data = p_track->context.BOXDATA(p_trun);
/* NOW PARSE TRUN WITH MDAT */
int i_ret = LeafParseTRUN( p_demux, p_track,
i_trun_sample_default_duration, i_trun_sample_default_size,
p_trun_data, & p_sys->context.i_mdatbytesleft );
if ( i_ret != VLC_SUCCESS )
goto end;
p_track->context.p_trun = p_track->context.p_trun->p_next;
}
if ( p_sys->context.i_mdatbytesleft == 0 )
p_sys->context.i_current_box_type = 0;
return VLC_SUCCESS;
}
end:
/* Skip if we didn't reach the end of mdat box */
if ( p_sys->context.i_mdatbytesleft > 0 )
{
msg_Warn( p_demux, "mdat had still %"PRIu32" bytes unparsed as samples", p_sys->context.i_mdatbytesleft - 8 );
stream_ReadU32( p_demux->s, NULL, p_sys->context.i_mdatbytesleft );
}
p_sys->context.i_current_box_type = 0;
return VLC_SUCCESS;
}
static int DemuxAsLeaf( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
unsigned i_track_selected = 0;
/* check for newly selected/unselected track */
for( unsigned i_track = 0; i_track < p_sys->i_tracks; i_track++ )
{
mp4_track_t *tk = &p_sys->track[i_track];
bool b;
if( !tk->b_ok || tk->b_chapter )
continue;
es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
msg_Dbg( p_demux, "track %u %s!", tk->i_track_ID, b ? "enabled" : "disabled" );
if( tk->b_selected && !b )
MP4_TrackUnselect( p_demux, tk );
else if( !tk->b_selected && b)
MP4_frg_TrackSelect( p_demux, tk );
if( tk->b_selected )
i_track_selected++;
}
if( i_track_selected <= 0 )
{
msg_Warn( p_demux, "no track selected, exiting..." );
return 0;
}
if ( p_sys->context.i_current_box_type != ATOM_mdat )
{
/* Othewise mdat is skipped. FIXME: mdat reading ! */
const uint8_t *p_peek;
int i_read = stream_Peek( p_demux->s, &p_peek, 8 );
if ( i_read < 8 )
return 0;
p_sys->context.i_current_box_type = VLC_FOURCC( p_peek[4], p_peek[5], p_peek[6], p_peek[7] );
if ( p_sys->context.i_current_box_type != ATOM_mdat )
{
if ( ! BoxExistsInRootTree( p_sys->p_root, p_sys->context.i_current_box_type, stream_Tell( p_demux->s ) ) )
{// only if !b_probed ??
MP4_Box_t *p_vroot = LoadNextChunk( p_demux );
switch( p_sys->context.i_current_box_type )
{
case ATOM_moov:
case ATOM_moof:
/* create fragment */
AddFragment( p_demux, p_vroot->p_first );
//ft
default:
break;
}
/* Append to root */
p_sys->p_root->p_last->p_next = p_vroot->p_first;
p_sys->p_root->p_last = p_vroot->p_first;
p_vroot->p_last = NULL;
p_vroot->p_next = NULL;
p_vroot->p_first = NULL;
MP4_BoxFree( p_demux->s, p_vroot );
}
else
{
/* Skip */
msg_Err( p_demux, "skipping known chunk type %4.4s size %"PRIu32, (char*)& p_sys->context.i_current_box_type, GetDWBE( p_peek ) );
stream_Read( p_demux->s, NULL, GetDWBE( p_peek ) );
}
}
else
{
/* skip mdat header */
p_sys->context.p_fragment = GetFragmentByPos( p_demux,
stream_Tell( p_demux->s ) + 8, true );
}
}
if ( p_sys->context.i_current_box_type == ATOM_mdat )
{
assert(p_sys->context.p_fragment);
if ( p_sys->context.p_fragment )
switch( p_sys->context.p_fragment->p_moox->i_type )
{
case ATOM_moov://[ftyp/moov, mdat]+ -> [moof, mdat]+
LeafParseMDATwithMOOV( p_demux );
break;
case ATOM_moof:
LeafParseMDATwithMOOF( p_demux, p_sys->context.p_fragment->p_moox ); // BACKUP CHUNK!
break;
default:
msg_Err( p_demux, "fragment type %4.4s", (char*) &p_sys->context.p_fragment->p_moox->i_type );
break;
}
}
/* Get current time */
mtime_t i_lowest_dts = VLC_TS_INVALID;
mtime_t i_lowest_time = INT64_MAX;
for( unsigned int i_track = 0; i_track < p_sys->i_tracks; i_track++ )
{
const mp4_track_t *p_track = &p_sys->track[i_track];
if( !p_track->b_selected || ( p_track->fmt.i_cat != VIDEO_ES && p_track->fmt.i_cat != AUDIO_ES ) )
continue;
i_lowest_time = __MIN( i_lowest_time, p_track->i_time * p_sys->i_timescale / p_track->i_timescale );
if ( i_lowest_dts == VLC_TS_INVALID )
i_lowest_dts = CLOCK_FREQ * p_track->i_time / p_track->i_timescale;
else
i_lowest_dts = __MIN( i_lowest_dts, CLOCK_FREQ * p_track->i_time / p_track->i_timescale );
}
p_sys->i_time = i_lowest_time;
p_sys->i_pcr = i_lowest_dts;
es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + p_sys->i_pcr );
return 1;
}
/* ASF Handlers */
inline static mp4_track_t *MP4ASF_GetTrack( asf_packet_sys_t *p_packetsys,
uint8_t i_stream_number )
{
demux_sys_t *p_sys = p_packetsys->p_demux->p_sys;
for ( unsigned int i=0; i<p_sys->i_tracks; i++ )
{
if ( p_sys->track[i].p_asf &&
i_stream_number == p_sys->track[i].BOXDATA(p_asf)->i_stream_number )
{
return &p_sys->track[i];
}
}
return NULL;
}
static asf_track_info_t * MP4ASF_GetTrackInfo( asf_packet_sys_t *p_packetsys,
uint8_t i_stream_number )
{
mp4_track_t *p_track = MP4ASF_GetTrack( p_packetsys, i_stream_number );
if ( p_track )
return &p_track->asfinfo;
else
return NULL;
}
static void MP4ASF_Send( asf_packet_sys_t *p_packetsys, uint8_t i_stream_number,
block_t **pp_frame )
{
mp4_track_t *p_track = MP4ASF_GetTrack( p_packetsys, i_stream_number );
if ( !p_track )
{
block_Release( *pp_frame );
}
else
{
block_t *p_gather = block_ChainGather( *pp_frame );
p_gather->i_dts = p_track->i_dts_backup;
p_gather->i_pts = p_track->i_pts_backup;
es_out_Send( p_packetsys->p_demux->out, p_track->p_es, p_gather );
}
*pp_frame = NULL;
}
static void MP4ASF_ResetFrames( demux_sys_t *p_sys )
{
for ( unsigned int i=0; i<p_sys->i_tracks; i++ )
{
mp4_track_t *p_track = &p_sys->track[i];
if( p_track->asfinfo.p_frame )
{
block_ChainRelease( p_track->asfinfo.p_frame );
p_track->asfinfo.p_frame = NULL;
}
}
}
#undef BOXDATA