mirrors/vlc
0
0
Fork 0
mirror of https://github.com/videolan/vlc.git synced 2025-01-27 01:56:19 +08:00
Code Issues Packages Projects Releases Wiki Activity

* modules/demux/mp4/mp4.c: a couple of fixes for track selection when seeking.

Browse Source
This commit is contained in:
Gildas Bazin 2004-07-07 12:29:21 +00:00
parent 85f1cd8a7a
commit 28e9ed2913
1 changed files with 65 additions and 76 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

141
modules/demux/mp4/mp4.c
View File

@ -496,7 +496,8 @@ static int Demux( demux_t *p_demux )
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++ )
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];
@ -641,8 +642,8 @@ static int Demux( demux_t *p_demux )
}
/*****************************************************************************
* Seek: Got to i_date
******************************************************************************/
static int Seek ( demux_t *p_demux, mtime_t 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;
@ -655,13 +656,9 @@ static int Seek ( demux_t *p_demux, mtime_t i_date )
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 )
{
MP4_TrackSeek( p_demux, tk, i_date );
}
MP4_TrackSeek( p_demux, tk, i_date );
}
return( 1 );
return VLC_SUCCESS;
}
/*****************************************************************************
@ -1019,8 +1016,7 @@ static int TrackCreateSamplesIndex( demux_t *p_demux,
}
msg_Dbg( p_demux,
"track[Id 0x%x] read %d samples length:"I64Fd"s",
msg_Dbg( p_demux, "track[Id 0x%x] read %d samples length:"I64Fd"s",
p_demux_track->i_track_ID,
p_demux_track->i_sample_count,
i_last_dts / p_demux_track->i_timescale );
@ -1030,12 +1026,10 @@ static int TrackCreateSamplesIndex( demux_t *p_demux,
/*
* TrackCreateES:
* Create ES and PES to init decoder if needed, for a track starting at i_chunk
* 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 )
static int TrackCreateES( demux_t *p_demux, mp4_track_t *p_track,
unsigned int i_chunk, es_out_id_t **pp_es )
{
MP4_Box_t *p_sample;
MP4_Box_t *p_esds;
@ -1305,11 +1299,9 @@ static int TrackCreateES ( demux_t *p_demux,
/* 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 )
static int TrackTimeToSampleChunk( demux_t *p_demux, mp4_track_t *p_track,
int64_t i_start, uint32_t *pi_chunk,
uint32_t *pi_sample )
{
demux_sys_t *p_sys = p_demux->p_sys;
MP4_Box_t *p_stss;
@ -1333,7 +1325,7 @@ static int TrackTimeToSampleChunk( demux_t *p_demux,
/* now calculate i_start for this elst */
/* offset */
i_start -= p_track->i_elst_time * (int64_t)1000000 / p_sys->i_timescale;
i_start -= p_track->i_elst_time * I64C(1000000) / p_sys->i_timescale;
if( i_start < 0 )
{
*pi_chunk = 0;
@ -1351,8 +1343,8 @@ static int TrackTimeToSampleChunk( demux_t *p_demux,
i_start += elst->i_media_time[p_track->i_elst];
}
msg_Dbg( p_demux, "elst (%d) gives "I64Fd"ms (movie)-> "I64Fd"ms (track)",
p_track->i_elst,
msg_Dbg( p_demux, "elst (%d) gives "I64Fd"ms (movie)-> "I64Fd
"ms (track)", p_track->i_elst,
i_mvt * 1000 / p_sys->i_timescale,
i_start * 1000 / p_track->i_timescale );
}
@ -1403,15 +1395,16 @@ static int TrackTimeToSampleChunk( demux_t *p_demux,
{
break;
}
i_sample += ( i_start - i_dts ) / p_track->chunk[i_chunk].p_sample_delta_dts[i_index];
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",
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 );
}
@ -1450,7 +1443,7 @@ static int TrackTimeToSampleChunk( demux_t *p_demux,
/* new i_sample is more than old so i_chunk can only increased */
while( i_chunk < p_track->i_chunk_count - 1 &&
i_sample >= p_track->chunk[i_chunk].i_sample_first +
p_track->chunk[i_chunk].i_sample_count )
p_track->chunk[i_chunk].i_sample_count )
{
i_chunk++;
}
@ -1461,9 +1454,8 @@ static int TrackTimeToSampleChunk( demux_t *p_demux,
}
else
{
msg_Dbg( p_demux,
"track[Id 0x%x] does not provide Sync Sample Box (stss)",
p_track->i_track_ID );
msg_Dbg( p_demux, "track[Id 0x%x] does not provide Sync "
"Sample Box (stss)", p_track->i_track_ID );
}
*pi_chunk = i_chunk;
@ -1472,30 +1464,28 @@ static int TrackTimeToSampleChunk( demux_t *p_demux,
return VLC_SUCCESS;
}
static int TrackGotoChunkSample( demux_t *p_demux,
mp4_track_t *p_track,
unsigned int i_chunk,
unsigned int i_sample )
static int TrackGotoChunkSample( demux_t *p_demux, mp4_track_t *p_track,
unsigned int i_chunk, unsigned int i_sample )
{
vlc_bool_t b_reselect = VLC_FALSE;
/* now see if actual es is ok */
if( p_track->i_chunk < 0 ||
p_track->i_chunk >= p_track->i_chunk_count ||
p_track->i_chunk >= p_track->i_chunk_count - 1 ||
p_track->chunk[p_track->i_chunk].i_sample_description_index !=
p_track->chunk[i_chunk].i_sample_description_index )
{
msg_Warn( p_demux, "recreate ES" );
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_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 ) )
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 );
@ -1524,9 +1514,8 @@ static int TrackGotoChunkSample( demux_t *p_demux,
* 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 )
static void MP4_TrackCreate( demux_t *p_demux, mp4_track_t *p_track,
MP4_Box_t *p_box_trak )
{
demux_sys_t *p_sys = p_demux->p_sys;
@ -1707,7 +1696,9 @@ static void MP4_TrackCreate( demux_t *p_demux,
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 );
fprintf( stderr, "%-5d sample_count=%d pts=%lld\n",
i, p_track->chunk[i].i_sample_count,
p_track->chunk[i].i_first_dts );
}
}
@ -1720,8 +1711,7 @@ static void MP4_TrackCreate( demux_t *p_demux,
****************************************************************************
* Destroy a track created by MP4_TrackCreate.
****************************************************************************/
static void MP4_TrackDestroy( demux_t *p_demux,
mp4_track_t *p_track )
static void MP4_TrackDestroy( demux_t *p_demux, mp4_track_t *p_track )
{
unsigned int i_chunk;
@ -1747,9 +1737,8 @@ static void MP4_TrackDestroy( demux_t *p_demux,
}
}
static int MP4_TrackSelect ( demux_t *p_demux,
mp4_track_t *p_track,
mtime_t i_start )
static int MP4_TrackSelect( demux_t *p_demux, mp4_track_t *p_track,
mtime_t i_start )
{
if( !p_track->b_ok )
{
@ -1758,8 +1747,7 @@ static int MP4_TrackSelect ( demux_t *p_demux,
if( p_track->b_selected )
{
msg_Warn( p_demux,
"track[Id 0x%x] already selected",
msg_Warn( p_demux, "track[Id 0x%x] already selected",
p_track->i_track_ID );
return VLC_SUCCESS;
}
@ -1767,8 +1755,7 @@ static int MP4_TrackSelect ( demux_t *p_demux,
return MP4_TrackSeek( p_demux, p_track, i_start );
}
static void MP4_TrackUnselect(demux_t *p_demux,
mp4_track_t *p_track )
static void MP4_TrackUnselect( demux_t *p_demux, mp4_track_t *p_track )
{
if( !p_track->b_ok )
{
@ -1777,22 +1764,21 @@ static void MP4_TrackUnselect(demux_t *p_demux,
if( !p_track->b_selected )
{
msg_Warn( p_demux,
"track[Id 0x%x] already unselected",
msg_Warn( p_demux, "track[Id 0x%x] already unselected",
p_track->i_track_ID );
return;
}
if( p_track->p_es )
{
es_out_Control( p_demux->out, ES_OUT_SET_ES_STATE, p_track->p_es, VLC_FALSE );
es_out_Control( p_demux->out, ES_OUT_SET_ES_STATE,
p_track->p_es, VLC_FALSE );
}
p_track->b_selected = VLC_FALSE;
}
static int MP4_TrackSeek ( demux_t *p_demux,
mp4_track_t *p_track,
mtime_t i_start )
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;
@ -1802,21 +1788,22 @@ static int MP4_TrackSeek ( demux_t *p_demux,
return( VLC_EGENERIC );
}
if( TrackTimeToSampleChunk( p_demux,
p_track, i_start,
p_track->b_selected = VLC_FALSE;
if( TrackTimeToSampleChunk( p_demux, p_track, i_start,
&i_chunk, &i_sample ) )
{
msg_Warn( p_demux,
"cannot select track[Id 0x%x]",
msg_Warn( p_demux, "cannot select track[Id 0x%x]",
p_track->i_track_ID );
return( VLC_EGENERIC );
}
p_track->b_selected = VLC_TRUE;
if( TrackGotoChunkSample( p_demux, p_track, i_chunk, i_sample ) )
if( TrackGotoChunkSample( p_demux, p_track, i_chunk, i_sample ) ==
VLC_SUCCESS )
{
p_track->b_selected = VLC_FALSE;
p_track->b_selected = VLC_TRUE;
}
return( p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC );
}
@ -1827,7 +1814,7 @@ static int MP4_TrackSeek ( demux_t *p_demux,
*
*/
#define QT_V0_MAX_SAMPLES 1500
static int MP4_TrackSampleSize( mp4_track_t *p_track )
static int MP4_TrackSampleSize( mp4_track_t *p_track )
{
int i_size;
MP4_Box_data_sample_soun_t *p_soun;
@ -1954,12 +1941,11 @@ static int MP4_TrackNextSample( demux_t *p_demux,
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,
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 );
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;
}
@ -1970,19 +1956,23 @@ static int MP4_TrackNextSample( demux_t *p_demux,
{
demux_sys_t *p_sys = p_demux->p_sys;
MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
int64_t i_mvt = MP4_TrackGetPTS( p_demux, p_track ) * p_sys->i_timescale / (int64_t)1000000;
int64_t i_mvt = MP4_TrackGetPTS( p_demux, p_track ) *
p_sys->i_timescale / (int64_t)1000000;
if( p_track->i_elst < elst->i_entry_count &&
i_mvt >= p_track->i_elst_time + elst->i_segment_duration[p_track->i_elst] )
i_mvt >= p_track->i_elst_time +
elst->i_segment_duration[p_track->i_elst] )
{
MP4_TrackSetELST( p_demux, p_track, MP4_TrackGetPTS( p_demux, p_track ) );
MP4_TrackSetELST( p_demux, p_track,
MP4_TrackGetPTS( p_demux, p_track ) );
}
}
return VLC_SUCCESS;
}
static void MP4_TrackSetELST( demux_t *p_demux, mp4_track_t *tk, int64_t i_time )
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;
@ -2024,4 +2014,3 @@ static void MP4_TrackSetELST( demux_t *p_demux, mp4_track_t *tk, int64_t i_time
msg_Warn( p_demux, "elst old=%d new=%d", i_elst_last, tk->i_elst );
}
}