#include "mlt_tractor.h"
#include "mlt_frame.h"
+#include "mlt_multitrack.h"
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
/** Private structure.
*/
struct mlt_tractor_s
{
- struct mlt_service_s parent;
+ struct mlt_producer_s parent;
mlt_service producer;
};
/** Forward references to static methods.
*/
-static int service_get_frame( mlt_service this, mlt_frame_ptr frame, int track );
+static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int track );
+static void producer_close( mlt_producer this );
/** Constructor for the tractor.
mlt_tractor this = calloc( sizeof( struct mlt_tractor_s ), 1 );
if ( this != NULL )
{
- mlt_service service = &this->parent;
- if ( mlt_service_init( service, this ) == 0 )
+ mlt_producer producer = &this->parent;
+ if ( mlt_producer_init( producer, this ) == 0 )
{
- service->get_frame = service_get_frame;
+ mlt_properties_set( mlt_producer_properties( producer ), "resource", "<tractor>" );
+ mlt_properties_set( mlt_producer_properties( producer ), "mlt_type", "mlt_producer" );
+ mlt_properties_set( mlt_producer_properties( producer ), "mlt_service", "tractor" );
+
+ producer->get_frame = producer_get_frame;
+ producer->close = producer_close;
}
else
{
mlt_service mlt_tractor_service( mlt_tractor this )
{
+ return mlt_producer_service( &this->parent );
+}
+
+/** Get the producer object associated to the tractor.
+*/
+
+mlt_producer mlt_tractor_producer( mlt_tractor this )
+{
return &this->parent;
}
+/** Get the properties object associated to the tractor.
+*/
+
+mlt_properties mlt_tractor_properties( mlt_tractor this )
+{
+ return mlt_producer_properties( &this->parent );
+}
+
/** Connect the tractor.
*/
int mlt_tractor_connect( mlt_tractor this, mlt_service producer )
{
- int ret = mlt_service_connect_producer( &this->parent, producer, 0 );
+ int ret = mlt_service_connect_producer( mlt_tractor_service( this ), producer, 0 );
+ // This is the producer we're going to connect to
if ( ret == 0 )
- {
- // This is the producer we're going to connect to
this->producer = producer;
- }
return ret;
}
TODO: This should be reading a pump being populated by the thread...
*/
-static int service_get_frame( mlt_service parent, mlt_frame_ptr frame, int track )
+static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int track )
{
mlt_tractor this = parent->child;
int i = 0;
int looking = 1;
int done = 0;
- mlt_frame temp;
+ mlt_frame temp = NULL;
+ mlt_frame store[ 10 ];
+ int count = 0;
- // Loop through each of the tracks we're harvesting
- for ( i = 0; !done; i ++ )
- {
- // Get a frame from the producer
- mlt_service_get_frame( this->producer, &temp, i );
+ // Get the properties of the parent producer
+ mlt_properties properties = mlt_producer_properties( parent );
- // Check for last track
- done = mlt_properties_get_int( mlt_frame_properties( temp ), "last_track" );
+ // Try to obtain the multitrack associated to the tractor
+ mlt_multitrack multitrack = mlt_properties_get_data( properties, "multitrack", NULL );
- // Handle the frame
- if ( done && looking )
- {
- // Use this as output if we don't have one already
- *frame = temp;
- }
- else if ( !mlt_frame_is_test_card( temp ) && looking )
+ // Or a specific producer
+ mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );
+
+ // If we don't have one, we're in trouble...
+ if ( multitrack != NULL )
+ {
+ mlt_producer target = mlt_multitrack_producer( multitrack );
+ mlt_producer_seek( target, mlt_producer_frame( parent ) );
+ mlt_producer_set_speed( target, mlt_producer_get_speed( parent ) );
+
+ // Loop through each of the tracks we're harvesting
+ for ( i = 0; !done; i ++ )
{
- // This is the one we want and we can stop looking
- *frame = temp;
- looking = 0;
+ // Get a frame from the producer
+ mlt_service_get_frame( this->producer, &temp, i );
+
+ // Check for last track
+ done = mlt_properties_get_int( mlt_frame_properties( temp ), "last_track" );
+
+ // Handle the frame
+ if ( done && looking )
+ {
+ // Use this as output if we don't have one already
+ *frame = temp;
+ }
+ else if ( ( !mlt_frame_is_test_card( temp ) || !mlt_frame_is_test_audio( temp ) ) && looking &&
+ mlt_producer_frame( parent ) == mlt_frame_get_position( temp ) )
+ {
+ *frame = temp;
+ looking = 0;
+ }
+ else
+ {
+ // We store all other frames for now
+ store[ count ++ ] = temp;
+ }
}
- else
+
+ // Now place all the unused frames on to the properties (will be destroyed automatically)
+ while ( count -- )
{
- // We discard all other frames
- mlt_frame_close( temp );
+ mlt_properties frame_properties = mlt_frame_properties( *frame );
+ char label[ 30 ];
+ sprintf( label, "tractor_%d", count );
+ while ( mlt_properties_get_data( frame_properties, label, NULL ) != NULL )
+ strcat( label, "+" );
+ mlt_properties_set_data( frame_properties, label, store[ count ], 0, ( mlt_destructor )mlt_frame_close, NULL );
}
}
+ else if ( producer != NULL )
+ {
+ mlt_producer_seek( producer, mlt_producer_frame( parent ) );
+ mlt_producer_set_speed( producer, mlt_producer_get_speed( parent ) );
+ mlt_service_get_frame( this->producer, frame, track );
+ }
+ else
+ {
+ fprintf( stderr, "tractor without a multitrack!!\n" );
+ mlt_service_get_frame( this->producer, frame, track );
+ }
+
+ // Prepare the next frame
+ mlt_producer_prepare_next( parent );
// Indicate our found status
return 0;
void mlt_tractor_close( mlt_tractor this )
{
- mlt_service_close( &this->parent );
+ this->parent.close = NULL;
+ mlt_producer_close( &this->parent );
free( this );
}
+/** Close the producer.
+*/
+
+static void producer_close( mlt_producer this )
+{
+ mlt_tractor_close( this->child );
+}
+
projects / melted / blobdiff