int mlt_multitrack_insert( mlt_multitrack self, mlt_producer producer, int track )
{
if ( track >= self->count )
return mlt_multitrack_connect( self, producer, track );
// Connect to the producer to ourselves at the specified track
int result = mlt_service_insert_producer( MLT_MULTITRACK_SERVICE( self ), MLT_PRODUCER_SERVICE( producer ), track );
if ( result == 0 )
{
// Resize the producer list if needed.
if ( self->count + 1 > self->size )
{
int new_size = self->size + 10;
self->list = realloc( self->list, new_size * sizeof( mlt_track ) );
if ( self->list )
{
memset( &self->list[ self->size ], 0, new_size - self->size );
self->size = new_size;
}
}
if ( self->list )
{
// Move all of the list elements following track N down by 1.
memmove( &self->list[ track + 1 ], &self->list[ track ],
( self->count - track ) * sizeof ( mlt_track ) );
self->count ++;
// Assign the track in our list.
self->list[ track ] = malloc( sizeof( struct mlt_track_s ) );
self->list[ track ]->producer = producer;
self->list[ track ]->event = mlt_events_listen( MLT_PRODUCER_PROPERTIES( producer ), self,
"producer-changed", ( mlt_listener )mlt_multitrack_listener );
mlt_properties_inc_ref( MLT_PRODUCER_PROPERTIES( producer ) );
mlt_event_inc_ref( self->list[ track ]->event );
// TODO: Move this into producer_avformat.c when mlt_events broadcasting is available.
if ( self->count > mlt_service_cache_get_size( MLT_MULTITRACK_SERVICE( self ), "producer_avformat" ) )
mlt_service_cache_set_size( MLT_MULTITRACK_SERVICE( self ), "producer_avformat", self->count + 1 );
// Refresh our stats
mlt_multitrack_refresh( self );
}
else
{
result = -1;
}
}
return result;
}
int mlt_multitrack_connect( mlt_multitrack self, mlt_producer producer, int track )
{
// Connect to the producer to ourselves at the specified track
int result = mlt_service_connect_producer( MLT_MULTITRACK_SERVICE( self ), MLT_PRODUCER_SERVICE( producer ), track );
if ( result == 0 )
{
mlt_track current_track = ( track < self->count )? self->list[ track ] : NULL;
// Resize the producer list if need be
if ( track >= self->size )
{
int i;
self->list = realloc( self->list, ( track + 10 ) * sizeof( mlt_track ) );
for ( i = self->size; i < track + 10; i ++ )
self->list[ i ] = NULL;
self->size = track + 10;
}
if ( current_track )
{
mlt_event_close( current_track->event );
mlt_producer_close( current_track->producer );
}
else
{
self->list[ track ] = malloc( sizeof( struct mlt_track_s ) );
}
// Assign the track in our list here
self->list[ track ]->producer = producer;
self->list[ track ]->event = mlt_events_listen( MLT_PRODUCER_PROPERTIES( producer ), self,
"producer-changed", ( mlt_listener )mlt_multitrack_listener );
mlt_properties_inc_ref( MLT_PRODUCER_PROPERTIES( producer ) );
mlt_event_inc_ref( self->list[ track ]->event );
// Increment the track count if need be
if ( track >= self->count )
{
self->count = track + 1;
// TODO: Move this into producer_avformat.c when mlt_events broadcasting is available.
if ( self->count > mlt_service_cache_get_size( MLT_MULTITRACK_SERVICE( self ), "producer_avformat" ) )
mlt_service_cache_set_size( MLT_MULTITRACK_SERVICE( self ), "producer_avformat", self->count + 1 );
}
// Refresh our stats
mlt_multitrack_refresh( self );
}
return result;
}
void mlt_tractor_refresh( mlt_tractor self )
{
mlt_multitrack multitrack = mlt_tractor_multitrack( self );
mlt_properties multitrack_props = MLT_MULTITRACK_PROPERTIES( multitrack );
mlt_properties properties = MLT_TRACTOR_PROPERTIES( self );
mlt_events_block( multitrack_props, properties );
mlt_events_block( properties, properties );
mlt_multitrack_refresh( multitrack );
mlt_properties_set_position( properties, "in", 0 );
mlt_properties_set_position( properties, "out", mlt_properties_get_position( multitrack_props, "out" ) );
mlt_events_unblock( properties, properties );
mlt_events_unblock( multitrack_props, properties );
mlt_properties_set_position( properties, "length", mlt_properties_get_position( multitrack_props, "length" ) );
}
int mlt_multitrack_disconnect( mlt_multitrack self, int track )
{
int error = -1;
if ( self && self->list && track >= 0 && track < self->count )
{
// Disconnect the track producer.
error = mlt_service_disconnect_producer( MLT_MULTITRACK_SERVICE(self), track );
if ( !error )
{
// Release references on track.
if ( self->list[ track ] )
{
mlt_producer_close( self->list[ track ]->producer );
mlt_event_close( self->list[ track ]->event );
if ( track + 1 >= self-> count )
{
free( self->list[ track ] );
self->list[ track ] = NULL;
}
}
// Contract the list of tracks.
for ( ; track + 1 < self->count; track ++ )
{
if ( self->list[ track ] && self->list[ track + 1 ] )
{
self->list[ track ]->producer = self->list[ track + 1 ]->producer;
self->list[ track ]->event = self->list[ track + 1 ]->event;
}
}
self->count --;
// Recalculate the duration.
mlt_multitrack_refresh( self );
}
}
return error;
}
static void mlt_multitrack_listener( mlt_producer producer, mlt_multitrack self )
{
mlt_multitrack_refresh( self );
}
