static void assign_buffered_image( mlt_properties producer_props, uint8_t *current_image, uint8_t *current_alpha, int width, int height )
{
+ int use_cache = mlt_properties_get_int( producer_props, "cache" );
+ mlt_destructor destructor = use_cache ? NULL : mlt_pool_release;
mlt_events_block( producer_props, NULL );
- mlt_properties_set_data( producer_props, "_qimage_image", current_image, 0, mlt_pool_release, NULL );
- mlt_properties_set_data( producer_props, "_qimage_alpha", current_alpha, 0, mlt_pool_release, NULL );
+ mlt_properties_set_data( producer_props, "_qimage_image", current_image, 0, destructor, NULL );
+ mlt_properties_set_data( producer_props, "_qimage_alpha", current_alpha, 0, destructor, NULL );
mlt_properties_set_int( producer_props, "_qimage_width", width );
mlt_properties_set_int( producer_props, "_qimage_height", height );
mlt_events_unblock( producer_props, NULL );
// Obtain properties of producer
mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
+ // Obtain the cache flag and structure
+ int use_cache = mlt_properties_get_int( producer_props, "cache" );
+ mlt_properties cache = ( mlt_properties )mlt_properties_get_data( producer_props, "_cache", NULL );
+ int update_cache = 0;
+
// Retrieve current info if available
uint8_t *current_image = ( uint8_t * )mlt_properties_get_data( producer_props, "_qimage_image", NULL );
uint8_t *current_alpha = ( uint8_t * )mlt_properties_get_data( producer_props, "_qimage_alpha", NULL );
// Image index
int image_idx = ( int )floor( ( double )position / ttl ) % self->count;
+ // Key for the cache
+ char image_key[ 10 ];
+ sprintf( image_key, "%d", image_idx );
+
+ // Check if the frame is already loaded
+ if ( use_cache )
+ {
+ if ( cache == NULL )
+ {
+ cache = mlt_properties_new( );
+ mlt_properties_set_data( producer_props, "_cache", cache, 0, ( mlt_destructor )mlt_properties_close, NULL );
+ }
+
+ mlt_frame cached = ( mlt_frame )mlt_properties_get_data( cache, image_key, NULL );
+
+ if ( cached )
+ {
+ self->image_idx = image_idx;
+ mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
+ current_width = mlt_properties_get_int( cached_props, "width" );
+ current_height = mlt_properties_get_int( cached_props, "height" );
+ mlt_properties_set_int( producer_props, "_real_width", mlt_properties_get_int( cached_props, "real_width" ) );
+ mlt_properties_set_int( producer_props, "_real_height", mlt_properties_get_int( cached_props, "real_height" ) );
+ current_image = ( uint8_t * )mlt_properties_get_data( cached_props, "image", NULL );
+ current_alpha = ( uint8_t * )mlt_properties_get_data( cached_props, "alpha", NULL );
+
+ if ( width != 0 && ( width != current_width || height != current_height ) )
+ current_image = NULL;
+
+ assign_buffered_image( producer_props, current_image, current_alpha, current_width, current_height );
+ }
+ }
+
// optimization for subsequent iterations on single picture
if ( width != 0 && current_image != NULL && image_idx == self->image_idx )
{
mlt_convert_bgr24a_to_yuv422( temp.bits( ), current_width, current_height, temp.bytesPerLine( ), current_image, current_alpha );
assign_buffered_image( producer_props, current_image, current_alpha, current_width, current_height );
+
+ // Ensure we update the cache when we need to
+ update_cache = use_cache;
}
// Set width/height of frame
// pass the image data without destructor
mlt_properties_set_data( properties, "image", current_image, current_width * ( current_height + 1 ) * 2, NULL, NULL );
mlt_properties_set_data( properties, "alpha", current_alpha, current_width * current_height, NULL, NULL );
+
+ if ( update_cache )
+ {
+ mlt_frame cached = mlt_frame_init( );
+ mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
+ mlt_properties_set_int( cached_props, "width", current_width );
+ mlt_properties_set_int( cached_props, "height", current_height );
+ mlt_properties_set_int( cached_props, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
+ mlt_properties_set_int( cached_props, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
+ mlt_properties_set_data( cached_props, "image", current_image, current_width * ( current_height + 1 ) * 2, mlt_pool_release, NULL );
+ mlt_properties_set_data( cached_props, "alpha", current_alpha, current_width * current_height, mlt_pool_release, NULL );
+ mlt_properties_set_data( cache, image_key, cached, 0, ( mlt_destructor )mlt_frame_close, NULL );
+ }
}
}