// Obtain properties of frame
mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
+ // We need to know the size of the image to clone it
+ int image_size = 0;
+ int alpha_size = 0;
+
+ // Alpha channel
+ uint8_t *alpha = NULL;
+
*width = mlt_properties_get_int( properties, "rescale_width" );
*height = mlt_properties_get_int( properties, "rescale_height" );
// Refresh the image
refresh_image( frame, *width, *height );
- // May need to know the size of the image to clone it
- int size = 0;
-
// Get the image
- uint8_t *image = mlt_properties_get_data( properties, "image", &size );
+ *buffer = mlt_properties_get_data( properties, "image", &image_size );
+ alpha = mlt_properties_get_data( properties, "alpha", &alpha_size );
- // Get width and height
+ // Get width and height (may have changed during the refresh)
*width = mlt_properties_get_int( properties, "width" );
*height = mlt_properties_get_int( properties, "height" );
- if ( size == 0 )
- {
- *width = mlt_properties_get_int( properties, "normalised_width" );
- *height = mlt_properties_get_int( properties, "normalised_height" );
- size = *width * ( *height + 1 );
- }
-
- // Clone if necessary
// NB: Cloning is necessary with this producer (due to processing of images ahead of use)
// The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
- if ( image != NULL )
+ if ( *buffer != NULL )
{
- // Clone our image
- uint8_t *copy = mlt_pool_alloc( size );
- if ( image != NULL )
- memcpy( copy, image, size );
+ // Clone the image and the alpha
+ uint8_t *image_copy = mlt_pool_alloc( image_size );
+ uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
- // We're going to pass the copy on
- image = copy;
+ memcpy( image_copy, *buffer, image_size );
+
+ // Copy or default the alpha
+ if ( alpha != NULL )
+ memcpy( alpha_copy, alpha, alpha_size );
+ else
+ memset( alpha_copy, 255, alpha_size );
// Now update properties so we free the copy after
- mlt_properties_set_data( properties, "image", copy, size, mlt_pool_release, NULL );
+ mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
+ mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
+
+ // We're going to pass the copy on
+ *buffer = image_copy;
}
else
{
- // Fall back to the test card...
- mlt_frame_get_image( frame, buffer, format, width, height, writable );
+ // TODO: Review all cases of invalid images
+ *buffer = mlt_pool_alloc( 50 * 50 * 2 );
+ mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
+ *width = 50;
+ *height = 50;
}
- // Pass on the image
- *buffer = image;
-
return 0;
}