#include <stdio.h>
#include <stdlib.h>
-/** Composition class.
+/** Geometry struct.
*/
-typedef struct
+struct geometry_s
{
- struct mlt_transition_s parent;
+ int nw;
+ int nh;
+ float x;
+ float y;
+ float w;
+ float h;
+ float mix;
+};
+
+/** Parse a value from a geometry string.
+*/
+
+static float parse_value( char **ptr, int normalisation, char delim, float defaults )
+{
+ float value = defaults;
+
+ if ( *ptr != NULL && **ptr != '\0' )
+ {
+ char *end = NULL;
+ value = strtod( *ptr, &end );
+ if ( end != NULL )
+ {
+ if ( *end == '%' )
+ value = ( value / 100.0 ) * normalisation;
+ while ( *end == delim || *end == '%' )
+ end ++;
+ }
+ *ptr = end;
+ }
+
+ return value;
}
-transition_composite;
-/** Get the image.
+/** Parse a geometry property string with the syntax X,Y:WxH:MIX. Any value can be
+ expressed as a percentage by appending a % after the value, otherwise values are
+ assumed to be relative to the normalised dimensions of the consumer.
+*/
+
+static void geometry_parse( struct geometry_s *geometry, struct geometry_s *defaults, char *property, int nw, int nh )
+{
+ // Assign normalised width and height
+ geometry->nw = nw;
+ geometry->nh = nh;
+
+ // 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 )
+ {
+ char *ptr = property;
+ geometry->x = parse_value( &ptr, nw, ',', geometry->x );
+ geometry->y = parse_value( &ptr, nh, ':', geometry->y );
+ geometry->w = parse_value( &ptr, nw, 'x', geometry->w );
+ geometry->h = parse_value( &ptr, nh, ':', geometry->h );
+ geometry->mix = parse_value( &ptr, 100, ' ', geometry->mix );
+ }
+}
+
+/** 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->nw = in->nw;
+ output->nh = in->nh;
+ 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 );
+}
+
+static int get_value( mlt_properties properties, char *preferred, char *fallback )
+{
+ int value = mlt_properties_get_int( properties, preferred );
+ if ( value == 0 )
+ value = mlt_properties_get_int( properties, fallback );
+ return value;
+}
+
+/** Composite function.
+*/
+
+static int composite_yuv( uint8_t *p_dest, int width_dest, int height_dest, uint8_t *p_src, int width_src, int height_src, uint8_t *p_alpha, struct geometry_s geometry )
+{
+ int ret = 0;
+ int i, j;
+ int x_src = 0, y_src = 0;
+ float weight = geometry.mix / 100;
+ int x = ( geometry.x * width_dest ) / geometry.nw;
+ int y = ( geometry.y * height_dest ) / geometry.nh;
+ int stride_src = width_src * 2;
+ int stride_dest = width_dest * 2;
+
+ x -= x % 2;
+
+ // optimization points - no work to do
+ if ( width_src <= 0 || height_src <= 0 )
+ return ret;
+
+ if ( ( x < 0 && -x >= width_src ) || ( y < 0 && -y >= height_src ) )
+ return ret;
+
+ // 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;
+
+ // 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 properly sized image from b_frame.
*/
-static int transition_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
+static int get_b_frame_image( mlt_frame b_frame, uint8_t **image, int *width, int *height, struct geometry_s *geometry )
{
- // Get the properties of the a frame
- mlt_properties a_props = mlt_frame_properties( this );
+ int ret = 0;
+ mlt_image_format format = mlt_image_yuv422;
+
+ // Compute the dimensioning rectangle
+ mlt_properties b_props = mlt_frame_properties( b_frame );
+ mlt_transition this = mlt_properties_get_data( b_props, "transition_composite", NULL );
+ mlt_properties properties = mlt_transition_properties( this );
+
+ if ( mlt_properties_get( properties, "distort" ) == NULL )
+ {
+ // Now do additional calcs based on real_width/height etc
+ //int normalised_width = mlt_properties_get_int( b_props, "normalised_width" );
+ //int normalised_height = mlt_properties_get_int( b_props, "normalised_height" );
+ int normalised_width = geometry->w;
+ int normalised_height = geometry->h;
+ int real_width = get_value( b_props, "real_width", "width" );
+ int real_height = get_value( b_props, "real_height", "height" );
+ double input_ar = mlt_frame_get_aspect_ratio( b_frame );
+ double output_ar = mlt_properties_get_double( b_props, "consumer_aspect_ratio" );
+ int scaled_width = ( input_ar > output_ar ? input_ar / output_ar : output_ar / input_ar ) * real_width;
+ int scaled_height = ( input_ar > output_ar ? input_ar / output_ar : output_ar / input_ar ) * real_height;
+
+ // Now ensure that our images fit in the normalised frame
+ if ( scaled_width > normalised_width )
+ {
+ scaled_height = scaled_height * normalised_width / scaled_width;
+ scaled_width = normalised_width;
+ }
+ if ( scaled_height > normalised_height )
+ {
+ scaled_width = scaled_width * normalised_height / scaled_height;
+ scaled_height = normalised_height;
+ }
+
+ // Special case
+ if ( scaled_height == normalised_height )
+ scaled_width = normalised_width;
+
+ // Now we need to align to the geometry
+ if ( scaled_width <= geometry->w && scaled_height <= geometry->h )
+ {
+ // TODO: Should take into account requested alignment here...
+ // Assume centred alignment for now
+
+ geometry->x = geometry->x + ( geometry->w - scaled_width ) / 2;
+ geometry->y = geometry->y + ( geometry->h - scaled_height ) / 2;
+ geometry->w = scaled_width;
+ geometry->h = scaled_height;
+ mlt_properties_set( b_props, "distort", "true" );
+ }
+ else
+ {
+ mlt_properties_set( b_props, "distort", "true" );
+ }
+ }
+ else
+ {
+ // We want to ensure that we bypass resize now...
+ mlt_properties_set( b_props, "distort", "true" );
+ }
+
+ int x = ( geometry->x * *width ) / geometry->nw;
+ int y = ( geometry->y * *height ) / geometry->nh;
+ *width = ( geometry->w * *width ) / geometry->nw;
+ *height = ( geometry->h * *height ) / geometry->nh;
+
+ x -= x % 2;
+
+ // optimization points - no work to do
+ if ( *width <= 0 || *height <= 0 )
+ return 1;
+
+ if ( ( x < 0 && -x >= *width ) || ( y < 0 && -y >= *height ) )
+ return 1;
+
+ ret = mlt_frame_get_image( b_frame, image, &format, width, height, 1 /* writable */ );
+ 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 );
+
+ // This compositer is yuv422 only
+ *format = mlt_image_yuv422;
+
+ // 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 a frame
+ mlt_properties a_props = mlt_frame_properties( a_frame );
+
// 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;
-
- // 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" );
-
- // Composite the b_frame on the a_frame
- mlt_frame_composite_yuv( this, b_frame, x, y, mix );
-
- // 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 );
-
- // Close the b_frame
- mlt_frame_close( b_frame );
- }
- 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 );
+ // Get the transition from the b frame
+ mlt_transition this = mlt_properties_get_data( b_props, "transition_composite", NULL );
+
+ // Get the properties from the transition
+ mlt_properties properties = mlt_transition_properties( this );
+
+ // Structures for geometry
+ struct geometry_s result;
+ struct geometry_s start;
+ struct geometry_s end;
+
+ // Calculate the position
+ float position = position_calculate( this, a_frame );
+
+ // Obtain the normalised width and height from the a_frame
+ int normalised_width = mlt_properties_get_int( a_props, "normalised_width" );
+ int normalised_height = mlt_properties_get_int( a_props, "normalised_height" );
+
+ // Now parse the geometries
+ geometry_parse( &start, NULL, mlt_properties_get( properties, "start" ), normalised_width, normalised_height );
+ geometry_parse( &end, &start, mlt_properties_get( properties, "end" ), normalised_width, normalised_height );
+
+ // Do the calculation
+ geometry_calculate( &result, &start, &end, position );
+
+ // Since we are the consumer of the b_frame, we must pass along these
+ // consumer properties from the a_frame
+ mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
+ mlt_properties_set_double( b_props, "consumer_scale", mlt_properties_get_double( a_props, "consumer_scale" ) );
+
+ // Get the image from the b frame
+ uint8_t *image_b;
+ int width_b = *width;
+ int height_b = *height;
+ if ( get_b_frame_image( b_frame, &image_b, &width_b, &height_b, &result ) == 0 )
+ {
+ uint8_t *alpha = mlt_frame_get_alpha_mask( b_frame );
+
+ // Composite the b_frame on the a_frame
+ composite_yuv( *image, *width, *height, image_b, width_b, height_b, alpha, result );
+ }
}
return 0;
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%:10%x10%" );
+ mlt_properties_set( mlt_transition_properties( this ), "end", "" );
}
- return NULL;
+ return this;
}
projects / melted / blobdiff