*/
static int producer_get_frame( mlt_service this, mlt_frame_ptr frame, int index );
+static void mlt_producer_property_changed( mlt_service owner, mlt_producer this, char *name );
+static void mlt_producer_service_changed( mlt_service owner, mlt_producer this );
/** Constructor
*/
// The parent is the service
mlt_service parent = &this->parent;
+ // Define the parent close
+ parent->close = ( mlt_destructor )mlt_producer_close;
+ parent->close_object = this;
+
+ // For convenience, we'll assume the close_object is this
+ this->close_object = this;
+
// Get the properties of the parent
mlt_properties properties = mlt_service_properties( parent );
// Override service get_frame
parent->get_frame = producer_get_frame;
+
+ mlt_events_listen( properties, this, "service-changed", ( mlt_listener )mlt_producer_service_changed );
+ mlt_events_listen( properties, this, "property-changed", ( mlt_listener )mlt_producer_property_changed );
+ mlt_events_register( properties, "producer-changed", NULL );
}
}
return error;
}
+/** Listener for property changes.
+*/
+
+static void mlt_producer_property_changed( mlt_service owner, mlt_producer this, char *name )
+{
+ if ( !strcmp( name, "in" ) || !strcmp( name, "out" ) || !strcmp( name, "length" ) )
+ mlt_events_fire( mlt_producer_properties( mlt_producer_cut_parent( this ) ), "producer-changed", NULL );
+}
+
+/** Listener for service changes.
+*/
+
+static void mlt_producer_service_changed( mlt_service owner, mlt_producer this )
+{
+ mlt_events_fire( mlt_producer_properties( mlt_producer_cut_parent( this ) ), "producer-changed", NULL );
+}
+
/** Create a new producer.
*/
return this;
}
+/** Determine if producer is a cut.
+*/
+
+int mlt_producer_is_cut( mlt_producer this )
+{
+ return mlt_properties_get_int( mlt_producer_properties( this ), "_cut" );
+}
+
+/** Obtain the parent producer.
+*/
+
+mlt_producer mlt_producer_cut_parent( mlt_producer this )
+{
+ mlt_properties properties = mlt_producer_properties( this );
+ if ( mlt_producer_is_cut( this ) )
+ return mlt_properties_get_data( properties, "_cut_parent", NULL );
+ else
+ return this;
+}
+
+/** Create a cut of this producer
+*/
+
+mlt_producer mlt_producer_cut( mlt_producer this, int in, int out )
+{
+ mlt_producer result = mlt_producer_new( );
+ mlt_producer parent = mlt_producer_cut_parent( this );
+ mlt_properties properties = mlt_producer_properties( result );
+ mlt_properties parent_props = mlt_producer_properties( parent );
+
+ // Special case - allow for a cut of the entire producer (this will squeeze all other cuts to 0)
+ if ( in <= 0 )
+ in = 0;
+ if ( out >= mlt_producer_get_playtime( parent ) )
+ out = mlt_producer_get_playtime( parent ) - 1;
+
+ mlt_properties_inc_ref( parent_props );
+ mlt_properties_set_int( properties, "_cut", 1 );
+ mlt_properties_set_data( properties, "_cut_parent", parent, 0, ( mlt_destructor )mlt_producer_close, NULL );
+ mlt_properties_set_position( properties, "length", mlt_properties_get_position( parent_props, "length" ) );
+ mlt_properties_set_position( properties, "in", 0 );
+ mlt_properties_set_position( properties, "out", 0 );
+ mlt_producer_set_in_and_out( result, in, out );
+
+ return result;
+}
+
/** Get the parent service object.
*/
mlt_service mlt_producer_service( mlt_producer this )
{
- return &this->parent;
+ return this != NULL ? &this->parent : NULL;
}
/** Get the producer properties.
int mlt_producer_seek( mlt_producer this, mlt_position position )
{
// Determine eof handling
- char *eof = mlt_properties_get( mlt_producer_properties( this ), "eof" );
- int use_points = 1 - mlt_properties_get_int( mlt_producer_properties( this ), "ignore_points" );
+ mlt_properties properties = mlt_producer_properties( this );
+ char *eof = mlt_properties_get( properties, "eof" );
+ int use_points = 1 - mlt_properties_get_int( properties, "ignore_points" );
+
+ // Recursive behaviour for cuts...
+ if ( mlt_producer_is_cut( this ) )
+ mlt_producer_seek( mlt_producer_cut_parent( this ), position + mlt_producer_get_in( this ) );
// Check bounds
if ( position < 0 )
int mlt_producer_set_in_and_out( mlt_producer this, mlt_position in, mlt_position out )
{
+ mlt_properties properties = mlt_producer_properties( this );
+
// Correct ins and outs if necessary
if ( in < 0 )
in = 0;
}
// Set the values
- mlt_properties_set_position( mlt_producer_properties( this ), "in", in );
- mlt_properties_set_position( mlt_producer_properties( this ), "out", out );
+ mlt_events_block( properties, properties );
+ mlt_properties_set_position( properties, "in", in );
+ mlt_events_unblock( properties, properties );
+ mlt_properties_set_position( properties, "out", out );
+
+ return 0;
+}
+
+/** Physically reduce the producer (typically a cut) to a 0 length.
+ Essentially, all 0 length cuts should be immediately removed by containers.
+*/
+int mlt_producer_clear( mlt_producer this )
+{
+ if ( this != NULL )
+ {
+ mlt_properties properties = mlt_producer_properties( this );
+ mlt_events_block( properties, properties );
+ mlt_properties_set_position( properties, "in", 0 );
+ mlt_events_unblock( properties, properties );
+ mlt_properties_set_position( properties, "out", -1 );
+ }
return 0;
}
int result = 1;
mlt_producer this = service->child;
- // Determine eof handling
- char *eof = mlt_properties_get( mlt_producer_properties( this ), "eof" );
-
- // A properly instatiated producer will have a get_frame method...
- if ( this->get_frame == NULL || ( !strcmp( eof, "continue" ) && mlt_producer_position( this ) > mlt_producer_get_out( this ) ) )
+ if ( !mlt_producer_is_cut( this ) )
{
- // Generate a test frame
- *frame = mlt_frame_init( );
+ // Determine eof handling
+ char *eof = mlt_properties_get( mlt_producer_properties( this ), "eof" );
+
+ // A properly instatiated producer will have a get_frame method...
+ if ( this->get_frame == NULL || ( !strcmp( eof, "continue" ) && mlt_producer_position( this ) > mlt_producer_get_out( this ) ) )
+ {
+ // Generate a test frame
+ *frame = mlt_frame_init( );
- // Set the position
- result = mlt_frame_set_position( *frame, mlt_producer_position( this ) );
+ // Set the position
+ result = mlt_frame_set_position( *frame, mlt_producer_position( this ) );
- // Mark as a test card
- mlt_properties_set_int( mlt_frame_properties( *frame ), "test_image", 1 );
- mlt_properties_set_int( mlt_frame_properties( *frame ), "test_audio", 1 );
+ // Mark as a test card
+ mlt_properties_set_int( mlt_frame_properties( *frame ), "test_image", 1 );
+ mlt_properties_set_int( mlt_frame_properties( *frame ), "test_audio", 1 );
- // Calculate the next position
- mlt_producer_prepare_next( this );
+ // Calculate the next position
+ mlt_producer_prepare_next( this );
+ }
+ else
+ {
+ // Get the frame from the implementation
+ result = this->get_frame( this, frame, index );
+ }
+
+ // Copy the fps and speed of the producer onto the frame
+ mlt_properties properties = mlt_frame_properties( *frame );
+ double speed = mlt_producer_get_speed( this );
+ mlt_properties_set_double( properties, "_speed", speed );
+ mlt_properties_set_double( properties, "fps", mlt_producer_get_fps( this ) );
+ mlt_properties_set_int( properties, "test_audio", mlt_frame_is_test_audio( *frame ) );
+ mlt_properties_set_int( properties, "test_image", mlt_frame_is_test_card( *frame ) );
}
else
{
- // Get the frame from the implementation
- result = this->get_frame( this, frame, index );
+ mlt_properties properties = mlt_producer_properties( this );
+ mlt_producer_seek( this, mlt_properties_get_int( properties, "_position" ) );
+ result = producer_get_frame( mlt_producer_service( mlt_producer_cut_parent( this ) ), frame, index );
+ double speed = mlt_producer_get_speed( this );
+ mlt_properties_set_double( mlt_frame_properties( *frame ), "_speed", speed );
+ mlt_producer_prepare_next( this );
}
- // Copy the fps and speed of the producer onto the frame
- mlt_properties properties = mlt_frame_properties( *frame );
- mlt_properties_set_double( properties, "fps", mlt_producer_get_fps( this ) );
- double speed = mlt_producer_get_speed( this );
- mlt_properties_set_double( properties, "_speed", speed );
+ return result;
+}
- return 0;
+/** Attach a filter.
+*/
+
+int mlt_producer_attach( mlt_producer this, mlt_filter filter )
+{
+ return mlt_service_attach( mlt_producer_service( this ), filter );
+}
+
+/** Detach a filter.
+*/
+
+int mlt_producer_detach( mlt_producer this, mlt_filter filter )
+{
+ return mlt_service_detach( mlt_producer_service( this ), filter );
+}
+
+/** Retrieve a filter.
+*/
+
+mlt_filter mlt_producer_filter( mlt_producer this, int index )
+{
+ return mlt_service_filter( mlt_producer_service( this ), index );
}
/** Close the producer.
void mlt_producer_close( mlt_producer this )
{
- if ( this->close != NULL )
- this->close( this );
- else
- mlt_service_close( &this->parent );
+ if ( this != NULL && mlt_properties_dec_ref( mlt_producer_properties( this ) ) <= 0 )
+ {
+ this->parent.close = NULL;
+
+ if ( this->close != NULL )
+ this->close( this->close_object );
+ else
+ mlt_service_close( &this->parent );
+ }
}
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