C++ (Cpp) mlt_frame_properties Examples

Example #1

File: producer_consumer.c Project: Metacowboy/mlt

static int get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
{
	context cx = mlt_frame_pop_service( frame );
	mlt_frame nested_frame = mlt_frame_pop_service( frame );

	*width = cx->profile->width;
	*height = cx->profile->height;

	int result = mlt_frame_get_image( nested_frame, image, format, width, height, writable );

	// Allocate the image
	int size = mlt_image_format_size( *format, *width, *height, NULL );
	uint8_t *new_image = mlt_pool_alloc( size );

	// Update the frame
	mlt_properties properties = mlt_frame_properties( frame );
	mlt_frame_set_image( frame, new_image, size, mlt_pool_release );
	memcpy( new_image, *image, size );
	mlt_properties_set( properties, "progressive", mlt_properties_get( MLT_FRAME_PROPERTIES(nested_frame), "progressive" ) );
	*image = new_image;
	
	// Copy the alpha channel
	uint8_t *alpha = mlt_properties_get_data( MLT_FRAME_PROPERTIES( nested_frame ), "alpha", &size );
	if ( alpha && size > 0 )
	{
		new_image = mlt_pool_alloc( size );
		memcpy( new_image, alpha, size );
		mlt_frame_set_alpha( frame, new_image, size, mlt_pool_release );
	}

	return result;
}

Example #2

File: producer_consumer.c Project: zaenalarifin/mlt

static int get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
{
	context cx = mlt_frame_pop_service( frame );
	mlt_frame nested_frame = mlt_frame_pop_service( frame );

	*width = cx->profile->width;
	*height = cx->profile->height;

	int result = mlt_frame_get_image( nested_frame, image, format, width, height, writable );

	// Allocate the image
	int size = *width * *height * ( *format == mlt_image_yuv422 ? 2 : *format == mlt_image_rgb24 ? 3 :
		( *format == mlt_image_rgb24a || *format == mlt_image_opengl ) ? 4 : ( 3 / 2 ) );
	uint8_t *new_image = mlt_pool_alloc( size );

	// Update the frame
	mlt_properties properties = mlt_frame_properties( frame );
	mlt_properties_set_data( properties, "image", new_image, size, mlt_pool_release, NULL );
	memcpy( new_image, *image, size );
	mlt_properties_set( properties, "progressive", mlt_properties_get( MLT_FRAME_PROPERTIES(nested_frame), "progressive" ) );
	*image = new_image;

	return result;
}