Пример #1
0
static int producer_get_frame( mlt_service service, mlt_frame_ptr frame, int index )
{
	int result = 1;
	mlt_producer self = service != NULL ? service->child : NULL;

	if ( self != NULL && !mlt_producer_is_cut( self ) )
	{
		// Get the properties of this producer
		mlt_properties properties = MLT_PRODUCER_PROPERTIES( self );

		// Determine eof handling
		char *eof = mlt_properties_get( MLT_PRODUCER_PROPERTIES( self ), "eof" );

		// Get the speed of the producer
		double speed = mlt_producer_get_speed( self );

		// We need to use the clone if it's specified
		mlt_producer clone = mlt_properties_get_data( properties, "use_clone", NULL );

		// If no clone is specified, use self
		clone = clone == NULL ? self : clone;

		// A properly instatiated producer will have a get_frame method...
		if ( self->get_frame == NULL || ( eof && !strcmp( eof, "continue" ) && mlt_producer_position( self ) > mlt_producer_get_out( self ) ) )
		{
			// Generate a test frame
			*frame = mlt_frame_init( service );

			// Set the position
			result = mlt_frame_set_position( *frame, mlt_producer_position( self ) );

			// 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( self );
		}
		else
		{
			// Get the frame from the implementation
			result = self->get_frame( clone, frame, index );
		}

		// Copy the fps and speed of the producer onto the frame
		properties = MLT_FRAME_PROPERTIES( *frame );
		mlt_properties_set_double( properties, "_speed", speed );
		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 ) );
		if ( mlt_properties_get_data( properties, "_producer", NULL ) == NULL )
			mlt_properties_set_data( properties, "_producer", service, 0, NULL, NULL );
	}
	else if ( self != NULL )
	{
		// Get the speed of the cut
		double speed = mlt_producer_get_speed( self );

		// Get the parent of the cut
		mlt_producer parent = mlt_producer_cut_parent( self );

		// Get the properties of the parent
		mlt_properties parent_properties = MLT_PRODUCER_PROPERTIES( parent );

		// Get the properties of the cut
		mlt_properties properties = MLT_PRODUCER_PROPERTIES( self );

		// Determine the clone index
		int clone_index = mlt_properties_get_int( properties, "_clone" );

		// Determine the clone to use
		mlt_producer clone = self;

		if ( clone_index > 0 )
		{
			char key[ 25 ];
			sprintf( key, "_clone.%d", clone_index - 1 );
			clone = mlt_properties_get_data( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( self ) ), key, NULL );
			if ( clone == NULL ) mlt_log( service, MLT_LOG_ERROR, "requested clone doesn't exist %d\n", clone_index );
			clone = clone == NULL ? self : clone;
		}
		else
		{
			clone = parent;
		}

		// We need to seek to the correct position in the clone
		mlt_producer_seek( clone, mlt_producer_get_in( self ) + mlt_properties_get_int( properties, "_position" ) );

		// Assign the clone property to the parent
		mlt_properties_set_data( parent_properties, "use_clone", clone, 0, NULL, NULL );

		// Now get the frame from the parents service
		result = mlt_service_get_frame( MLT_PRODUCER_SERVICE( parent ), frame, index );

		// We're done with the clone now
		mlt_properties_set_data( parent_properties, "use_clone", NULL, 0, NULL, NULL );

		// This is useful and required by always_active transitions to determine in/out points of the cut
		if ( mlt_properties_get_data( MLT_FRAME_PROPERTIES( *frame ), "_producer", NULL ) == MLT_PRODUCER_SERVICE( parent ) )
			mlt_properties_set_data( MLT_FRAME_PROPERTIES( *frame ), "_producer", self, 0, NULL, NULL );

		mlt_properties_set_double( MLT_FRAME_PROPERTIES( *frame ), "_speed", speed );
		mlt_producer_prepare_next( self );
	}
	else
	{
		*frame = mlt_frame_init( service );
		result = 0;
	}

	// Pass on all meta properties from the producer/cut on to the frame
	if ( *frame != NULL && self != NULL )
	{
		int i = 0;
		mlt_properties p_props = MLT_PRODUCER_PROPERTIES( self );
		mlt_properties f_props = MLT_FRAME_PROPERTIES( *frame );
		mlt_properties_lock( p_props );
		int count = mlt_properties_count( p_props );
		for ( i = 0; i < count; i ++ )
		{
			char *name = mlt_properties_get_name( p_props, i );
			if ( !strncmp( name, "meta.", 5 ) )
				mlt_properties_set( f_props, name, mlt_properties_get_value( p_props, i ) );
			else if ( !strncmp( name, "set.", 4 ) )
				mlt_properties_set( f_props, name + 4, mlt_properties_get_value( p_props, i ) );
		}
		mlt_properties_unlock( p_props );
	}

	return result;
}
Пример #2
0
static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int track )
{
	mlt_tractor self = parent->child;

	// We only respond to the first track requests
	if ( track == 0 && self->producer != NULL )
	{
		int i = 0;
		int done = 0;
		mlt_frame temp = NULL;
		int count = 0;
		int image_count = 0;

		// Get the properties of the parent producer
		mlt_properties properties = MLT_PRODUCER_PROPERTIES( parent );

		// Try to obtain the multitrack associated to the tractor
		mlt_multitrack multitrack = mlt_properties_get_data( properties, "multitrack", NULL );

		// Or a specific producer
		mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );

		// Determine whether this tractor feeds to the consumer or stops here
		int global_feed = mlt_properties_get_int( properties, "global_feed" );

		// If we don't have one, we're in trouble...
		if ( multitrack != NULL )
		{
			// The output frame will hold the 'global' data feeds (ie: those which are targetted for the final frame)
			mlt_deque data_queue = mlt_deque_init( );

			// Used to garbage collect all frames
			char label[ 30 ];

			// Get the id of the tractor
			char *id = mlt_properties_get( properties, "_unique_id" );

			// Will be used to store the frame properties object
			mlt_properties frame_properties = NULL;

			// We'll store audio and video frames to use here
			mlt_frame audio = NULL;
			mlt_frame video = NULL;
			mlt_frame first_video = NULL;

			// Temporary properties
			mlt_properties temp_properties = NULL;

			// Get the multitrack's producer
			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 ) );

			// We will create one frame and attach everything to it
			*frame = mlt_frame_init( MLT_PRODUCER_SERVICE( parent ) );

			// Get the properties of the frame
			frame_properties = MLT_FRAME_PROPERTIES( *frame );

			// Loop through each of the tracks we're harvesting
			for ( i = 0; !done; i ++ )
			{
				// Get a frame from the producer
				mlt_service_get_frame( self->producer, &temp, i );

				// Get the temporary properties
				temp_properties = MLT_FRAME_PROPERTIES( temp );

				// Pass all unique meta properties from the producer's frame to the new frame
				mlt_properties_lock( temp_properties );
				int props_count = mlt_properties_count( temp_properties );
				int j;
				for ( j = 0; j < props_count; j ++ )
				{
					char *name = mlt_properties_get_name( temp_properties, j );
					if ( !strncmp( name, "meta.", 5 ) && !mlt_properties_get( frame_properties, name ) )
						mlt_properties_set( frame_properties, name, mlt_properties_get_value( temp_properties, j ) );
				}
				mlt_properties_unlock( temp_properties );

				// Copy the format conversion virtual functions
				if ( ! (*frame)->convert_image && temp->convert_image )
					(*frame)->convert_image = temp->convert_image;
				if ( ! (*frame)->convert_audio && temp->convert_audio )
					(*frame)->convert_audio = temp->convert_audio;

				// Check for last track
				done = mlt_properties_get_int( temp_properties, "last_track" );

				// Handle fx only tracks
				if ( mlt_properties_get_int( temp_properties, "fx_cut" ) )
				{
					int hide = ( video == NULL ? 1 : 0 ) | ( audio == NULL ? 2 : 0 );
					mlt_properties_set_int( temp_properties, "hide", hide );
				}

				// We store all frames with a destructor on the output frame
				sprintf( label, "_%s_%d", id, count ++ );
				mlt_properties_set_data( frame_properties, label, temp, 0, ( mlt_destructor )mlt_frame_close, NULL );

				// We want to append all 'final' feeds to the global queue
				if ( !done && mlt_properties_get_data( temp_properties, "data_queue", NULL ) != NULL )
				{
					// Move the contents of this queue on to the output frames data queue
					mlt_deque sub_queue = mlt_properties_get_data( MLT_FRAME_PROPERTIES( temp ), "data_queue", NULL );
					mlt_deque temp = mlt_deque_init( );
					while ( global_feed && mlt_deque_count( sub_queue ) )
					{
						mlt_properties p = mlt_deque_pop_back( sub_queue );
						if ( mlt_properties_get_int( p, "final" ) )
							mlt_deque_push_back( data_queue, p );
						else
							mlt_deque_push_back( temp, p );
					}
					while( mlt_deque_count( temp ) )
						mlt_deque_push_front( sub_queue, mlt_deque_pop_back( temp ) );
					mlt_deque_close( temp );
				}

				// Now do the same with the global queue but without the conditional behaviour
				if ( mlt_properties_get_data( temp_properties, "global_queue", NULL ) != NULL )
				{
					mlt_deque sub_queue = mlt_properties_get_data( MLT_FRAME_PROPERTIES( temp ), "global_queue", NULL );
					while ( mlt_deque_count( sub_queue ) )
					{
						mlt_properties p = mlt_deque_pop_back( sub_queue );
						mlt_deque_push_back( data_queue, p );
					}
				}

				// Pick up first video and audio frames
				if ( !done && !mlt_frame_is_test_audio( temp ) && !( mlt_properties_get_int( temp_properties, "hide" ) & 2 ) )
				{
					// Order of frame creation is starting to get problematic
					if ( audio != NULL )
					{
						mlt_deque_push_front( MLT_FRAME_AUDIO_STACK( temp ), producer_get_audio );
						mlt_deque_push_front( MLT_FRAME_AUDIO_STACK( temp ), audio );
					}
					audio = temp;
				}
				if ( !done && !mlt_frame_is_test_card( temp ) && !( mlt_properties_get_int( temp_properties, "hide" ) & 1 ) )
				{
					if ( video != NULL )
					{
						mlt_deque_push_front( MLT_FRAME_IMAGE_STACK( temp ), producer_get_image );
						mlt_deque_push_front( MLT_FRAME_IMAGE_STACK( temp ), video );
					}
					video = temp;
					if ( first_video == NULL )
						first_video = temp;

					mlt_properties_set_int( MLT_FRAME_PROPERTIES( temp ), "image_count", ++ image_count );
					image_count = 1;
				}
			}

			// Now stack callbacks
			if ( audio != NULL )
			{
				mlt_frame_push_audio( *frame, audio );
				mlt_frame_push_audio( *frame, producer_get_audio );
			}

			if ( video != NULL )
			{
				mlt_properties video_properties = MLT_FRAME_PROPERTIES( first_video );
				mlt_frame_push_service( *frame, video );
				mlt_frame_push_service( *frame, producer_get_image );
				if ( global_feed )
					mlt_properties_set_data( frame_properties, "data_queue", data_queue, 0, NULL, NULL );
				mlt_properties_set_data( video_properties, "global_queue", data_queue, 0, destroy_data_queue, NULL );
				mlt_properties_set_int( frame_properties, "width", mlt_properties_get_int( video_properties, "width" ) );
				mlt_properties_set_int( frame_properties, "height", mlt_properties_get_int( video_properties, "height" ) );
				mlt_properties_pass_list( frame_properties, video_properties, "meta.media.width, meta.media.height" );
				mlt_properties_set_int( frame_properties, "progressive", mlt_properties_get_int( video_properties, "progressive" ) );
				mlt_properties_set_double( frame_properties, "aspect_ratio", mlt_properties_get_double( video_properties, "aspect_ratio" ) );
				mlt_properties_set_int( frame_properties, "image_count", image_count );
				mlt_properties_set_data( frame_properties, "_producer", mlt_frame_get_original_producer( first_video ), 0, NULL, NULL );
			}
			else
			{
				destroy_data_queue( data_queue );
			}

			mlt_frame_set_position( *frame, mlt_producer_frame( parent ) );
			mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "test_audio", audio == NULL );
			mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "test_image", video == 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( self->producer, frame, track );
		}
		else
		{
			mlt_log( MLT_PRODUCER_SERVICE( parent ), MLT_LOG_ERROR, "tractor without a multitrack!!\n" );
			mlt_service_get_frame( self->producer, frame, track );
		}

		// Prepare the next frame
		mlt_producer_prepare_next( parent );

		// Indicate our found status
		return 0;
	}
	else
	{
		// Generate a test card
		*frame = mlt_frame_init( MLT_PRODUCER_SERVICE( parent ) );
		return 0;
	}
}