#include <stdio.h>
#include <stdlib.h>
+#include <ctype.h>
-/** Get the image.
+/** Geometry struct.
*/
-static int transition_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
+struct geometry_s
{
- // Get the properties of the a frame
- mlt_properties a_props = mlt_frame_properties( this );
+ int nw; // normalised width
+ int nh; // normalised height
+ int sw; // scaled width, not including consumer scale based upon w/nw
+ int sh; // scaled height, not including consumer scale based upon h/nh
+ float x;
+ float y;
+ float w;
+ float h;
+ float mix;
+ int halign; // horizontal alignment: 0=left, 1=center, 2=right
+ int valign; // vertical alignment: 0=top, 1=middle, 2=bottom
+};
- // Get the b frame from the stack
- mlt_frame b_frame = mlt_frame_pop_frame( this );
+/** Parse a value from a geometry string.
+*/
- if ( b_frame != NULL )
+static float parse_value( char **ptr, int normalisation, char delim, float defaults )
+{
+ float value = defaults;
+
+ if ( *ptr != NULL && **ptr != '\0' )
{
- // Get the properties of the b frame
- mlt_properties b_props = mlt_frame_properties( b_frame );
+ char *end = NULL;
+ value = strtod( *ptr, &end );
+ if ( end != NULL )
+ {
+ if ( *end == '%' )
+ value = ( value / 100.0 ) * normalisation;
+ while ( *end == delim || *end == '%' )
+ end ++;
+ }
+ *ptr = end;
+ }
- // 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, "image.mix" ) != NULL )
- mix = mlt_properties_get_double( b_props, "image.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 );
+ return value;
+}
+
+/** 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 = geometry->sw = defaults->w;
+ geometry->h = geometry->sh = defaults->h;
+ geometry->mix = defaults->mix;
}
- else if ( a_props != NULL )
+ else
{
- // 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 );
+ geometry->mix = 100;
}
- return 0;
+ // 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 = geometry->sw = parse_value( &ptr, nw, 'x', geometry->w );
+ geometry->h = geometry->sh = parse_value( &ptr, nh, ':', geometry->h );
+ geometry->mix = parse_value( &ptr, 100, ' ', geometry->mix );
+ }
}
-/** Composition transition processing.
+/** Calculate real geometry.
*/
-static mlt_frame composite_process( mlt_transition this, mlt_frame a_frame, mlt_frame b_frame )
+static void geometry_calculate( struct geometry_s *output, struct geometry_s *in, struct geometry_s *out, float position )
{
- // Propogate the transition properties to the b frame
- mlt_properties properties = mlt_transition_properties( this );
- mlt_properties b_props = mlt_frame_properties( b_frame );
+ // Calculate this frames geometry
+ output->nw = in->nw;
+ output->nh = in->nh;
+ output->x = in->x + ( out->x - in->x ) * position + 0.5;
+ output->y = in->y + ( out->y - in->y ) * position + 0.5;
+ 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;
+}
+
+/** Parse the alignment properties into the geometry.
+*/
+
+static int alignment_parse( char* align )
+{
+ int ret = 0;
+
+ if ( align == NULL );
+ else if ( isdigit( align[ 0 ] ) )
+ ret = atoi( align );
+ else if ( align[ 0 ] == 'c' || align[ 0 ] == 'm' )
+ ret = 1;
+ else if ( align[ 0 ] == 'r' || align[ 0 ] == 'b' )
+ ret = 2;
+
+ return ret;
+}
+
+/** Adjust position according to scaled size and alignment properties.
+*/
+
+static void alignment_calculate( struct geometry_s *geometry )
+{
+ geometry->x += ( geometry->w - geometry->sw ) * geometry->halign / 2 + 0.5;
+ geometry->y += ( geometry->h - geometry->sh ) * geometry->valign / 2 + 0.5;
+}
+
+/** 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 );
+}
+
+/** Calculate the field delta for this frame - position between two frames.
+*/
+
+static float delta_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
+ float x = ( float )( position - in ) / ( float )( out - in + 1 );
+ position++;
+ float y = ( float )( position - in ) / ( float )( out - in + 1 );
+
+ return ( y - x ) / 2.0;
+}
+
+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, int bpp, uint8_t *p_src, int width_src, int height_src, uint8_t *p_alpha, struct geometry_s geometry, int field )
+{
+ int ret = 0;
+ int i, j, k;
+ int x_src = 0, y_src = 0;
+ float weight = geometry.mix / 100;
+ int stride_src = width_src * bpp;
+ int stride_dest = width_dest * bpp;
+
+ // Adjust to consumer scale
+ int x = geometry.x * width_dest / geometry.nw + 0.5;
+ int y = geometry.y * height_dest / geometry.nh + 0.5;
+
+ if ( bpp == 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;
+ }
- 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" ) );
+ // 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 * bpp + y_src * stride_src;
+
+ // offset pointer into frame buffer based upon positive coordinates only!
+ p_dest += ( x < 0 ? 0 : x ) * bpp + ( 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 / bpp;
+
+ // Assuming lower field first
+ // Special care is taken to make sure the b_frame is aligned to the correct field.
+ // field 0 = lower field and y should be odd (y is 0-based).
+ // field 1 = upper field and y should be even.
+ if ( ( field > -1 ) && ( y % 2 == field ) )
+ {
+ if ( y == 0 )
+ p_dest += stride_dest;
+ else
+ p_dest -= stride_dest;
+ }
+
+ // On the second field, use the other lines from b_frame
+ if ( field == 1 )
+ {
+ p_src += stride_src;
+ if ( p_alpha )
+ p_alpha += stride_src / bpp;
+ height_src--;
+ }
+
+ uint8_t *p = p_src;
+ uint8_t *q = p_dest;
+ uint8_t *o = p_dest;
+ uint8_t *z = p_alpha;
+
+ uint8_t a;
+ float value;
+ int step = ( field > -1 ) ? 2 : 1;
- // Only if mix is specified, otherwise a producer may set the mix
- if ( mlt_properties_get( properties, "mix" ) != NULL )
+ // now do the compositing only to cropped extents
+ for ( i = 0; i < height_src; i += step )
{
- // A negative means dissolve
- if ( mlt_properties_get_double( properties, "mix" ) < 0 )
+ p = &p_src[ i * stride_src ];
+ q = &p_dest[ i * stride_dest ];
+ o = &p_dest[ i * stride_dest ];
+ if ( p_alpha )
+ z = &p_alpha[ i * stride_src / bpp ];
+
+ for ( j = 0; j < width_src; j ++ )
{
- // Determine the time position of this frame in the transition duration
- mlt_position in = mlt_transition_get_in( this );
- mlt_position out = mlt_transition_get_out( this );
- mlt_position time = mlt_frame_get_position( b_frame );
- double mix = ( double )( time - in ) / ( double )( out - in + 1 );
- mlt_properties_set_double( b_props, "image.mix", mix );
+ a = ( z == NULL ) ? 255 : *z ++;
+ value = ( weight * ( float ) a / 255.0 );
+ for ( k = 0; k < bpp; k ++ )
+ *o ++ = (uint8_t)( *p++ * value + *q++ * ( 1 - value ) );
}
+ }
+
+ return ret;
+}
+
+
+/** Get the properly sized image from b_frame.
+*/
+
+static int get_b_frame_image( mlt_frame b_frame, uint8_t **image, int *width, int *height, struct geometry_s *geometry )
+{
+ int ret = 0;
+ mlt_image_format format = mlt_image_yuv422;
+
+ // Initialise the scaled dimensions from the computed
+ geometry->sw = geometry->w;
+ geometry->sh = geometry->h;
+
+ // 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 )
+ {
+ // Adjust b_frame pixel aspect
+ 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;
+ int scaled_width = real_width;
+ int scaled_height = real_height;
+ double output_sar = ( double ) geometry->nw / geometry->nh / output_ar;
+
+ // We always normalise pixel aspect by requesting a larger than normal
+ // image in order to maximise usage of the bounding rectangle
+
+ // These calcs are optimised by reducing factors in equations
+ if ( output_sar < 1.0 )
+ // If the output is skinny pixels (PAL) then stretch our input vertically
+ // derived from: input_sar / output_sar * real_height
+ scaled_height = ( double )real_width / input_ar / output_sar;
+
else
- mlt_properties_set_double( b_props, "image.mix", mlt_properties_get_double( properties, "mix" ) );
+ // If the output is fat pixels (NTSC) then stretch our input horizontally
+ // derived from: output_sar / input_sar * real_width
+ scaled_width = output_sar * real_height * input_ar;
+
+// fprintf( stderr, "composite: real %dx%d scaled %dx%d normalised %dx%d\n", real_width, real_height, scaled_width, scaled_height, normalised_width, normalised_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;
+ }
+
+#if 0
+ // DRD> Why?
+ // Special case
+ if ( scaled_height == normalised_height )
+ scaled_width = normalised_width;
+#endif
+
+ // Now we need to align to the geometry
+ if ( scaled_width <= geometry->w && scaled_height <= geometry->h )
+ {
+ // Save the new scaled dimensions
+ geometry->sw = scaled_width;
+ geometry->sh = scaled_height;
+ }
}
-
+
+ // We want to ensure that we bypass resize now...
+ mlt_properties_set( b_props, "distort", "true" );
+
+ // Take into consideration alignment for optimisation
+ alignment_calculate( geometry );
+
+ // Adjust to consumer scale
+ int x = geometry->x * *width / geometry->nw + 0.5;
+ int y = geometry->y * *height / geometry->nh + 0.5;
+ *width = geometry->sw * *width / geometry->nw;
+ *height = geometry->sh * *height / geometry->nh;
+
+ x -= x % 2;
+
+ //fprintf( stderr, "composite calculated %d,%d:%dx%d\n", x, y, *width, *height );
+
+ // 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;
+}
+
+
+static uint8_t *transition_get_alpha_mask( mlt_frame this )
+{
+ // Obtain properties of frame
+ mlt_properties properties = mlt_frame_properties( this );
+
+ // Return the alpha mask
+ return mlt_properties_get_data( properties, "alpha", NULL );
+}
+
+/** 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( 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 );
+
+ // 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 );
+ float delta = delta_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 );
+
+ // Now parse the alignment
+ result.halign = alignment_parse( mlt_properties_get( properties, "halign" ) );
+ result.valign = alignment_parse( mlt_properties_get( properties, "valign" ) );
+
+ // 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" ) );
+
+ // Do the calculation
+ geometry_calculate( &result, &start, &end, position );
+
+ // 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 *dest = *image;
+ uint8_t *src = image_b;
+ int bpp = 2;
+ uint8_t *alpha = mlt_frame_get_alpha_mask( b_frame );
+ int progressive = mlt_properties_get_int( a_props, "progressive" ) ||
+ mlt_properties_get_int( a_props, "consumer_progressive" ) ||
+ mlt_properties_get_int( properties, "progressive" );
+ int field;
+
+ // See if the alpha channel is our destination
+ if ( mlt_properties_get( properties, "a_frame" ) != NULL )
+ {
+ bpp = 1;
+
+ // Get or make the a_frame alpha channel
+ dest = mlt_frame_get_alpha_mask( a_frame );
+ if ( dest == NULL )
+ {
+ // Allocate the alpha
+ dest = mlt_pool_alloc( *width * *height );
+ mlt_properties_set_data( a_props, "alpha", dest, *width * *height, ( mlt_destructor )mlt_pool_release, NULL );
+
+ // Set alpha call back
+ a_frame->get_alpha_mask = transition_get_alpha_mask;
+ }
+
+ // If the source is an image, convert its YUV to an alpha channel
+ if ( mlt_properties_get( properties, "b_frame" ) == NULL )
+ {
+ if ( alpha == NULL )
+ {
+ // Allocate the alpha
+ alpha = mlt_pool_alloc( width_b * height_b );
+ mlt_properties_set_data( b_props, "alpha", alpha, width_b * height_b, ( mlt_destructor )mlt_pool_release, NULL );
+
+ // Set alpha call back
+ b_frame->get_alpha_mask = transition_get_alpha_mask;
+ }
+
+ // Copy the Y values into alpha
+ uint8_t *p = image_b;
+ uint8_t *q = alpha;
+ int i;
+ for ( i = 0; i < width_b * height_b; i ++, p += 2 )
+ *q ++ = *p;
+
+ // Setup to composite from the alpha channel
+ src = alpha;
+ alpha = NULL;
+ }
+ }
+
+ // See if the alpha channel is our source
+ if ( mlt_properties_get( properties, "b_frame" ) != NULL )
+ {
+ // If we do not have an alpha channel fabricate it
+ if ( alpha == NULL )
+ {
+ // Allocate the alpha
+ alpha = mlt_pool_alloc( width_b * height_b );
+ mlt_properties_set_data( b_props, "alpha", alpha, width_b * height_b, ( mlt_destructor )mlt_pool_release, NULL );
+
+ // Set alpha call back
+ b_frame->get_alpha_mask = transition_get_alpha_mask;
+
+ // Copy the Y values into alpha
+ uint8_t *p = image_b;
+ uint8_t *q = alpha;
+ int i;
+ for ( i = 0; i < width_b * height_b; i ++, p += 2 )
+ *q ++ = *p;
+ }
+
+ // If the destination is image, convert the alpha channel to YUV
+ if ( mlt_properties_get( properties, "a_frame" ) == NULL )
+ {
+ uint8_t *p = alpha;
+ uint8_t *q = image_b;
+ int i;
+
+ for ( i = 0; i < width_b * height_b; i ++, p ++ )
+ {
+ *q ++ = 16 + ( ( float )*p / 255 * 220 ); // 220 is the luma range from 16-235
+ *q ++ = 128;
+ }
+ }
+ else
+ {
+ // Setup to composite from the alpha channel
+ src = alpha;
+ bpp = 1;
+ }
+
+ // Never the apply the alpha channel to this type of operation
+ alpha = NULL;
+ }
+
+ for ( field = 0; field < ( progressive ? 1 : 2 ); field++ )
+ {
+ // Assume lower field (0) first
+ float field_position = position + field * delta;
+
+ // Do the calculation
+ geometry_calculate( &result, &start, &end, field_position );
+
+ // Align
+ alignment_calculate( &result );
+
+ // Composite the b_frame on the a_frame
+ composite_yuv( dest, *width, *height, bpp, src, width_b, height_b, alpha, result, progressive ? -1 : field );
+ }
+ }
+ }
+
+ return 0;
+}
+
+/** Composition transition processing.
+*/
+
+static mlt_frame composite_process( mlt_transition this, mlt_frame a_frame, mlt_frame b_frame )
+{
+ // Propogate the transition properties to the b frame
+ mlt_properties b_props = mlt_frame_properties( b_frame );
+ 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;
}
if ( this != NULL && mlt_transition_init( this, NULL ) == 0 )
{
this->process = composite_process;
- if ( arg != NULL )
- mlt_properties_set_double( mlt_transition_properties( this ), "mix", atof( arg ) );
+ mlt_properties_set( mlt_transition_properties( this ), "start", arg != NULL ? arg : "85%,5%:10%x10%" );
+ mlt_properties_set( mlt_transition_properties( this ), "end", "" );
}
return this;
}
projects / melted / blobdiff