filter_mono.c: bugfix (kdenlive-234) threshold filter inverting image and add invert...

git-svn-id: https://mlt.svn.sourceforge.net/svnroot/mlt/trunk/mlt@1204 d19143bc-622f-0410-bfdd-b5b2a6649095

diff --git a/src/modules/vmfx/filter_mono.c b/src/modules/vmfx/filter_mono.c
index 2afab5d3d772f22429c6cde7e1585bcd4beca632..87deadd884c70969cc1deb33e7c58dfaebc2a380 100644 (file)
--- a/src/modules/vmfx/filter_mono.c
+++ b/src/modules/vmfx/filter_mono.c
@@ -32,11 +32,14 @@ static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *
 {
        int use_alpha = mlt_deque_pop_back_int( MLT_FRAME_IMAGE_STACK( this ) );
        int midpoint = mlt_deque_pop_back_int( MLT_FRAME_IMAGE_STACK( this ) );
+       int invert = mlt_deque_pop_back_int( MLT_FRAME_IMAGE_STACK( this ) );
 
        // Render the frame
        if ( mlt_frame_get_image( this, image, format, width, height, writable ) == 0 )
        {
                uint8_t *p = *image;
+               uint8_t A = invert? 16 : 235;
+               uint8_t B = invert? 235 : 16;
                int size = *width * *height;
 
                if ( !use_alpha )
@@ -44,9 +47,9 @@ static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *
                        while( size -- )
                        {
                                if ( *p >= midpoint )
-                                       *p ++ = 16;
+                                       *p ++ = A;
                                else
-                                       *p ++ = 235;
+                                       *p ++ = B;
                                *p ++ = 128;
                        }
                }
@@ -56,9 +59,9 @@ static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *
                        while( size -- )
                        {
                                if ( *alpha ++ < midpoint )
-                                       *p ++ = 16;
+                                       *p ++ = B;
                                else
-                                       *p ++ = 235;
+                                       *p ++ = A;
                                *p ++ = 128;
                        }
                }
@@ -74,6 +77,8 @@ static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
 {
        int midpoint = mlt_properties_get_int( MLT_FILTER_PROPERTIES( this ), "midpoint" );
        int use_alpha = mlt_properties_get_int( MLT_FILTER_PROPERTIES( this ), "use_alpha" );
+       int invert = mlt_properties_get_int( MLT_FILTER_PROPERTIES( this ), "invert" );
+       mlt_deque_push_back_int( MLT_FRAME_IMAGE_STACK( frame ), invert );
        mlt_deque_push_back_int( MLT_FRAME_IMAGE_STACK( frame ), midpoint );
        mlt_deque_push_back_int( MLT_FRAME_IMAGE_STACK( frame ), use_alpha );
        mlt_frame_push_get_image( frame, filter_get_image );
@@ -90,6 +95,7 @@ mlt_filter filter_mono_init( mlt_profile profile, mlt_service_type type, const c
        {
                mlt_properties_set_int( MLT_FILTER_PROPERTIES( this ), "midpoint", 128 );
                mlt_properties_set_int( MLT_FILTER_PROPERTIES( this ), "use_alpha", 0 );
+               mlt_properties_set_int( MLT_FILTER_PROPERTIES( this ), "invert", 0 );
                this->process = filter_process;
        }
        return this;