X-Git-Url: http://research.m1stereo.tv/gitweb?a=blobdiff_plain;f=src%2Fmodules%2Fcore%2Ftransition_composite.c;h=2903bb0300bf53b0fc6f894764d2fe617dcef27b;hb=acebb83a8ead55799505891f9a95be4eead9eb49;hp=ef896a9ff7b5678dd586a487ec1ff9222ceefb2d;hpb=c28f352daacca421f977bca75eefd36a73189dac;p=melted diff --git a/src/modules/core/transition_composite.c b/src/modules/core/transition_composite.c index ef896a9..2903bb0 100644 --- a/src/modules/core/transition_composite.c +++ b/src/modules/core/transition_composite.c @@ -24,58 +24,216 @@ #include #include -/** Composition class. +/** Geometry struct. */ -typedef struct +struct geometry_s { - struct mlt_transition_s parent; + float x; + float y; + float w; + float h; + float mix; +}; + +/** Parse a geometry property string. +*/ + +static void geometry_parse( struct geometry_s *geometry, struct geometry_s *defaults, char *property ) +{ + // Assign from defaults if available + if ( defaults != NULL ) + { + geometry->x = defaults->x; + geometry->y = defaults->y; + geometry->w = defaults->w; + geometry->h = defaults->h; + geometry->mix = defaults->mix; + } + else + { + geometry->mix = 100; + } + + // Parse the geomtry string + if ( property != NULL ) + sscanf( property, "%f,%f:%fx%f:%f", &geometry->x, &geometry->y, &geometry->w, &geometry->h, &geometry->mix ); } -transition_composite; -/** Get the image. +/** Calculate real geometry. +*/ + +static void geometry_calculate( struct geometry_s *output, struct geometry_s *in, struct geometry_s *out, float position ) +{ + // Calculate this frames geometry + output->x = in->x + ( out->x - in->x ) * position; + output->y = in->y + ( out->y - in->y ) * position; + output->w = in->w + ( out->w - in->w ) * position; + output->h = in->h + ( out->h - in->h ) * position; + output->mix = in->mix + ( out->mix - in->mix ) * position; +} + +/** Calculate the position for this frame. +*/ + +static float position_calculate( mlt_transition this, mlt_frame frame ) +{ + // Get the in and out position + mlt_position in = mlt_transition_get_in( this ); + mlt_position out = mlt_transition_get_out( this ); + + // Get the position of the frame + mlt_position position = mlt_frame_get_position( frame ); + + // Now do the calcs + return ( float )( position - in ) / ( float )( out - in + 1 ); +} + +/** Composite function. */ -static int transition_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable ) +static int composite_yuv( uint8_t *p_dest, mlt_image_format format_dest, int width_dest, int height_dest, mlt_frame that, struct geometry_s geometry ) { - // Get the properties of the a frame - mlt_properties a_props = mlt_frame_properties( this ); + int ret = 0; + uint8_t *p_src; + int i, j; + int stride_src; + int stride_dest; + int x_src = 0, y_src = 0; + + mlt_image_format format_src = format_dest; + int x = ( int )( ( float )width_dest * geometry.x / 100 ); + int y = ( int )( ( float )height_dest * geometry.y / 100 ); + float weight = geometry.mix / 100; + int width_src = ( int )( ( float )width_dest * geometry.w / 100 ); + int height_src = ( int )( ( float )height_dest * geometry.h / 100 ); + + x -= x % 2; + + // optimization point - no work to do + if ( ( x < 0 && -x >= width_src ) || ( y < 0 && -y >= height_src ) ) + return ret; + + format_src = mlt_image_yuv422; + format_dest = mlt_image_yuv422; + mlt_frame_get_image( that, &p_src, &format_src, &width_src, &height_src, 1 /* writable */ ); + + stride_src = width_src * 2; + stride_dest = width_dest * 2; + + // crop overlay off the left edge of frame + if ( x < 0 ) + { + x_src = -x; + width_src -= x_src; + x = 0; + } + + // crop overlay beyond right edge of frame + else if ( x + width_src > width_dest ) + width_src = width_dest - x; + + // crop overlay off the top edge of the frame + if ( y < 0 ) + { + y_src = -y; + height_src -= y_src; + } + // crop overlay below bottom edge of frame + else if ( y + height_src > height_dest ) + height_src = height_dest - y; + + // offset pointer into overlay buffer based on cropping + p_src += x_src * 2 + y_src * stride_src; + + // offset pointer into frame buffer based upon positive, even coordinates only! + p_dest += ( x < 0 ? 0 : x ) * 2 + ( y < 0 ? 0 : y ) * stride_dest; + + // Get the alpha channel of the overlay + uint8_t *p_alpha = mlt_frame_get_alpha_mask( that ); + + // offset pointer into alpha channel based upon cropping + if ( p_alpha ) + p_alpha += x_src + y_src * stride_src / 2; + + uint8_t *p = p_src; + uint8_t *q = p_dest; + uint8_t *o = p_dest; + uint8_t *z = p_alpha; + + uint8_t Y; + uint8_t UV; + uint8_t a; + float value; + + // now do the compositing only to cropped extents + for ( i = 0; i < height_src; i++ ) + { + p = p_src; + q = p_dest; + o = p_dest; + z = p_alpha; + + for ( j = 0; j < width_src; j ++ ) + { + Y = *p ++; + UV = *p ++; + a = ( z == NULL ) ? 255 : *z ++; + value = ( weight * ( float ) a / 255.0 ); + *o ++ = (uint8_t)( Y * value + *q++ * ( 1 - value ) ); + *o ++ = (uint8_t)( UV * value + *q++ * ( 1 - value ) ); + } + + p_src += stride_src; + p_dest += stride_dest; + if ( p_alpha ) + p_alpha += stride_src / 2; + } + + return ret; +} + + +/** Get the image. +*/ + +static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable ) +{ // Get the b frame from the stack - mlt_frame b_frame = mlt_frame_pop_frame( this ); + mlt_frame b_frame = mlt_frame_pop_frame( a_frame ); + + // Get the image from the a frame + mlt_frame_get_image( a_frame, image, format, width, height, 1 ); if ( b_frame != NULL ) { // Get the properties of the b frame mlt_properties b_props = mlt_frame_properties( b_frame ); - // Arbitrary composite defaults - int x = 0; - int y = 0; - double mix = 1.0; + // Get the transition from the b frame + mlt_transition this = mlt_properties_get_data( b_props, "transition_composite", NULL ); - // Override from b frame properties if provided - if ( mlt_properties_get( b_props, "x" ) != NULL ) - x = mlt_properties_get_int( b_props, "x" ); - if ( mlt_properties_get( b_props, "y" ) != NULL ) - y = mlt_properties_get_int( b_props, "y" ); - if ( mlt_properties_get( b_props, "mix" ) != NULL ) - mix = mlt_properties_get_double( b_props, "mix" ); + // Get the properties from the transition + mlt_properties properties = mlt_transition_properties( this ); - // Composite the b_frame on the a_frame - mlt_frame_composite_yuv( this, b_frame, x, y, mix ); + // Structures for geometry + struct geometry_s result; + struct geometry_s start; + struct geometry_s end; - // Extract the a_frame image info - *width = mlt_properties_get_int( a_props, "width" ); - *height = mlt_properties_get_int( a_props, "height" ); - *image = mlt_properties_get_data( a_props, "image", NULL ); - } - else if ( a_props != NULL ) - { - // Extract the a_frame image info - *width = mlt_properties_get_int( a_props, "width" ); - *height = mlt_properties_get_int( a_props, "height" ); - *image = mlt_properties_get_data( a_props, "image", NULL ); + // Calculate the position + float position = position_calculate( this, a_frame ); + + // Now parse the geometries + geometry_parse( &start, NULL, mlt_properties_get( properties, "start" ) ); + geometry_parse( &end, &start, mlt_properties_get( properties, "end" ) ); + + // Do the calculation + geometry_calculate( &result, &start, &end, position ); + + // Composite the b_frame on the a_frame + composite_yuv( *image, *format, *width, *height, b_frame, result ); } return 0; @@ -86,35 +244,26 @@ static int transition_get_image( mlt_frame this, uint8_t **image, mlt_image_form static mlt_frame composite_process( mlt_transition this, mlt_frame a_frame, mlt_frame b_frame ) { - mlt_frame_push_get_image( a_frame, transition_get_image ); - mlt_frame_push_frame( a_frame, b_frame ); - // Propogate the transition properties to the b frame - mlt_properties properties = mlt_transition_properties( this ); mlt_properties b_props = mlt_frame_properties( b_frame ); - if ( mlt_properties_get( properties, "x" ) != NULL ) - mlt_properties_set_int( b_props, "x", mlt_properties_get_int( properties, "x" ) ); - if ( mlt_properties_get( properties, "y" ) != NULL ) - mlt_properties_set_int( b_props, "y", mlt_properties_get_int( properties, "y" ) ); - if ( mlt_properties_get( properties, "mix" ) != NULL ) - mlt_properties_set_double( b_props, "mix", mlt_properties_get_double( properties, "mix" ) ); - + mlt_properties_set_data( b_props, "transition_composite", this, 0, NULL, NULL ); + mlt_frame_push_get_image( a_frame, transition_get_image ); + mlt_frame_push_frame( a_frame, b_frame ); return a_frame; } /** Constructor for the filter. */ -mlt_transition transition_composite_init( void *arg ) +mlt_transition transition_composite_init( char *arg ) { - transition_composite *this = calloc( sizeof( transition_composite ), 1 ); - if ( this != NULL ) + mlt_transition this = calloc( sizeof( struct mlt_transition_s ), 1 ); + if ( this != NULL && mlt_transition_init( this, NULL ) == 0 ) { - mlt_transition transition = &this->parent; - mlt_transition_init( transition, this ); - transition->process = composite_process; - return &this->parent; + this->process = composite_process; + mlt_properties_set( mlt_transition_properties( this ), "start", arg != NULL ? arg : "85,5:10x10" ); + mlt_properties_set( mlt_transition_properties( this ), "end", "" ); } - return NULL; + return this; }