static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
{
if ( frame )
{
// Construct a new frame
*frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
// Stack the producer and producer's get image
mlt_frame_push_service_int( *frame, index );
mlt_frame_push_service( *frame, producer );
mlt_frame_push_service( *frame, framebuffer_get_image );
mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
mlt_properties frame_properties = MLT_FRAME_PROPERTIES(*frame);
// Get frame from the real producer
mlt_frame first_frame = mlt_properties_get_data( properties, "first_frame", NULL );
if ( first_frame == NULL )
{
// Get the frame to cache from the real producer
mlt_producer real_producer = mlt_properties_get_data( properties, "producer", NULL );
// Seek the producer to the correct place
mlt_producer_seek( real_producer, mlt_producer_position( producer ) );
// Get the frame
mlt_service_get_frame( MLT_PRODUCER_SERVICE( real_producer ), &first_frame, index );
// Cache the frame
mlt_properties_set_data( properties, "first_frame", first_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
}
mlt_properties_inherit( frame_properties, MLT_FRAME_PROPERTIES(first_frame) );
double force_aspect_ratio = mlt_properties_get_double( properties, "force_aspect_ratio" );
if ( force_aspect_ratio <= 0.0 ) force_aspect_ratio = mlt_properties_get_double( properties, "aspect_ratio" );
mlt_properties_set_double( frame_properties, "aspect_ratio", force_aspect_ratio );
// Give the returned frame temporal identity
mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
mlt_properties_set_int( frame_properties, "meta.media.width", mlt_properties_get_int( properties, "width" ) );
mlt_properties_set_int( frame_properties, "meta.media.height", mlt_properties_get_int( properties, "height" ) );
mlt_properties_pass_list( frame_properties, properties, "width, height" );
}
return 0;
}
static mlt_frame process(mlt_filter filter, mlt_frame frame)
{
mlt_properties properties = MLT_FILTER_PROPERTIES(filter);
mlt_transition transition = mlt_properties_get_data(properties, "instance", NULL);
char *name = mlt_properties_get(MLT_FILTER_PROPERTIES(filter), "transition");
if (!name || !strcmp("", name))
return frame;
// Create the transition if needed.
if (!transition
|| !mlt_properties_get(MLT_FILTER_PROPERTIES(transition), "mlt_service")
|| strcmp(name, mlt_properties_get(MLT_FILTER_PROPERTIES(transition), "mlt_service"))) {
mlt_profile profile = mlt_service_profile(MLT_FILTER_SERVICE(filter));
transition = mlt_factory_transition(profile, name, NULL);
mlt_properties_set_data(MLT_FILTER_PROPERTIES(filter), "instance", transition, 0, (mlt_destructor) mlt_transition_close, NULL);
}
if (transition) {
mlt_properties transition_props = MLT_TRANSITION_PROPERTIES(transition);
int type = mlt_properties_get_int(transition_props, "_transition_type");
int hide = mlt_properties_get_int(MLT_FRAME_PROPERTIES(frame), "hide");
mlt_properties_pass_list(transition_props, properties, "in out");
mlt_properties_pass(transition_props, properties, "transition." );
// Only if video transition on visible track.
if ((type & 1) && !mlt_frame_is_test_card(frame) && !(hide & 1)) {
mlt_frame_push_service_int(frame,
mlt_image_format_id(mlt_properties_get(properties, "mlt_image_format")));
mlt_frame_push_service(frame, transition);
mlt_frame_push_get_image(frame, get_image);
}
if (type == 0)
mlt_properties_debug(transition_props, "unknown transition type", stderr);
} else {
mlt_properties_debug(properties, "mask_failed to create transition", stderr );
}
return frame;
}