+ Added an option to override alignment and transparent borders for compositing

[mlt] / src / modules / core / transition_luma.c

diff --git a/src/modules/core/transition_luma.c b/src/modules/core/transition_luma.c
index 29eb09582d1de3192150c692a12ca170c7089662..e55046cf26826fb595ef36ba097f437a96a87e53 100644 (file)
--- a/src/modules/core/transition_luma.c
+++ b/src/modules/core/transition_luma.c
@@ -69,8 +69,10 @@ static inline int dissolve_yuv( mlt_frame this, mlt_frame that, float weight, in
        int width_src = width, height_src = height;
        mlt_image_format format = mlt_image_yuv422;
        uint8_t *p_src, *p_dest;
-       uint8_t *p;
+       uint8_t *p, *q;
        uint8_t *limit;
+       uint8_t *alpha_src;
+       uint8_t *alpha_dst;
 
        int32_t weigh = weight * ( 1 << 16 );
        int32_t weigh_complement = ( 1 - weight ) * ( 1 << 16 );
@@ -79,19 +81,23 @@ static inline int dissolve_yuv( mlt_frame this, mlt_frame that, float weight, in
                mlt_properties_set( &that->parent, "distort", mlt_properties_get( &this->parent, "distort" ) );
        mlt_properties_set_int( &that->parent, "consumer_deinterlace", mlt_properties_get_int( &this->parent, "consumer_deinterlace" ) );
        mlt_frame_get_image( this, &p_dest, &format, &width, &height, 1 );
+       alpha_dst = mlt_frame_get_alpha_mask( this );
        mlt_frame_get_image( that, &p_src, &format, &width_src, &height_src, 0 );
+       alpha_src = mlt_frame_get_alpha_mask( that );
 
        // Pick the lesser of two evils ;-)
        width_src = width_src > width ? width : width_src;
        height_src = height_src > height ? height : height_src;
        
        p = p_dest;
+       q = alpha_dst;
        limit = p_dest + height_src * width_src * 2;
 
        while ( p < limit )
        {
                *p_dest++ = ( *p_src++ * weigh + *p++ * weigh_complement ) >> 16;
                *p_dest++ = ( *p_src++ * weigh + *p++ * weigh_complement ) >> 16;
+               *alpha_dst++ = ( *alpha_src++ * weigh + *q++ * weigh_complement ) >> 16;
        }
 
        return ret;