#include <framework/mlt_filter.h>
#include <framework/mlt_frame.h>
+#include <framework/mlt_log.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
-typedef int ( *image_scaler )( mlt_frame this, uint8_t **image, mlt_image_format iformat, mlt_image_format oformat, int iwidth, int iheight, int owidth, int oheight );
+/** virtual function declaration for an image scaler
+ *
+ * image scaler implementations are expected to support the following in and out formats:
+ * yuv422 -> yuv422
+ * rgb24 -> rgb24
+ * rgb24a -> rgb24a
+ * rgb24 -> yuv422
+ * rgb24a -> yuv422
+ */
-static void scale_alpha( mlt_frame this, int iwidth, int iheight, int owidth, int oheight );
+typedef int ( *image_scaler )( mlt_frame this, uint8_t **image, mlt_image_format *format, int iwidth, int iheight, int owidth, int oheight );
-static int filter_scale( mlt_frame this, uint8_t **image, mlt_image_format iformat, mlt_image_format oformat, int iwidth, int iheight, int owidth, int oheight )
+static int filter_scale( mlt_frame this, uint8_t **image, mlt_image_format *format, int iwidth, int iheight, int owidth, int oheight )
{
// Get the properties
mlt_properties properties = MLT_FRAME_PROPERTIES( this );
- // Get the rescaling interpolsation
- char *interps = mlt_properties_get( properties, "rescale.interp" );
+ // Convert the image to yuv422
+ *format = mlt_image_yuv422;
+ mlt_frame_get_image( this, image, format, &iwidth, &iheight, 0 );
- // Carry out the rescaling
- if ( iformat == mlt_image_yuv422 && oformat == mlt_image_yuv422 )
- {
- // Scale the frame
- mlt_frame_rescale_yuv422( this, owidth, oheight );
-
- // Return the output
- *image = mlt_properties_get_data( properties, "image", NULL );
- }
- else if ( iformat == mlt_image_rgb24 || iformat == mlt_image_rgb24a )
- {
- int bpp = (iformat == mlt_image_rgb24a ? 4 : 3 );
-
- // Create the yuv image
- uint8_t *output = mlt_pool_alloc( iwidth * ( iheight + 1 ) * 2 );
+ // Create the output image
+ uint8_t *output = mlt_pool_alloc( owidth * ( oheight + 1 ) * 2 );
- if ( strcmp( interps, "none" ) && ( iwidth != owidth || iheight != oheight ) )
- {
- // Extract YUV422 and alpha
- if ( bpp == 4 )
- {
- // Allocate the alpha mask
- uint8_t *alpha = mlt_pool_alloc( iwidth * ( iheight + 1 ) );
+ // Calculate strides
+ int istride = iwidth * 2;
+ int ostride = owidth * 2;
+ iwidth = iwidth - ( iwidth % 4 );
- // Convert the image and extract alpha
- mlt_convert_rgb24a_to_yuv422( *image, iwidth, iheight, iwidth * 4, output, alpha );
+ // Derived coordinates
+ int dy, dx;
- mlt_properties_set_data( properties, "alpha", alpha, iwidth * ( iheight + 1 ), ( mlt_destructor )mlt_pool_release, NULL );
+ // Calculate ranges
+ int out_x_range = owidth / 2;
+ int out_y_range = oheight / 2;
+ int in_x_range = iwidth / 2;
+ int in_y_range = iheight / 2;
- scale_alpha( this, iwidth, iheight, owidth, oheight );
- }
- else
- {
- // No alpha to extract
- mlt_convert_rgb24_to_yuv422( *image, iwidth, iheight, iwidth * 3, output );
- }
+ // Output pointers
+ register uint8_t *out_line = output;
+ register uint8_t *out_ptr;
- mlt_properties_set_data( properties, "image", output, iwidth * ( iheight + 1 ) * 2, ( mlt_destructor )mlt_pool_release, NULL );
+ // Calculate a middle pointer
+ uint8_t *in_middle = *image + istride * in_y_range + in_x_range * 2;
+ uint8_t *in_line;
- // Scale the frame
- output = mlt_frame_rescale_yuv422( this, owidth, oheight );
+ // Generate the affine transform scaling values
+ register int scale_width = ( iwidth << 16 ) / owidth;
+ register int scale_height = ( iheight << 16 ) / oheight;
+ register int base = 0;
- }
- else
- {
- // Extract YUV422 and alpha
- if ( bpp == 4 )
- {
- // Allocate the alpha mask
- uint8_t *alpha = mlt_pool_alloc( owidth * ( oheight + 1 ) );
+ int outer = out_x_range * scale_width;
+ int bottom = out_y_range * scale_height;
- // Convert the image and extract alpha
- mlt_convert_rgb24a_to_yuv422( *image, owidth, oheight, owidth * 4, output, alpha );
+ // Loop for the entirety of our output height.
+ for ( dy = - bottom; dy < bottom; dy += scale_height )
+ {
+ // Start at the beginning of the line
+ out_ptr = out_line;
- mlt_properties_set_data( properties, "alpha", alpha, owidth * ( oheight + 1 ), ( mlt_destructor )mlt_pool_release, NULL );
+ // Pointer to the middle of the input line
+ in_line = in_middle + ( dy >> 16 ) * istride;
- scale_alpha( this, iwidth, iheight, owidth, oheight );
- }
- else
- {
- // No alpha to extract
- mlt_convert_rgb24_to_yuv422( *image, owidth, oheight, owidth * 3, output );
- }
+ // Loop for the entirety of our output row.
+ for ( dx = - outer; dx < outer; dx += scale_width )
+ {
+ base = dx >> 15;
+ base &= 0xfffffffe;
+ *out_ptr ++ = *( in_line + base );
+ base &= 0xfffffffc;
+ *out_ptr ++ = *( in_line + base + 1 );
+ dx += scale_width;
+ base = dx >> 15;
+ base &= 0xfffffffe;
+ *out_ptr ++ = *( in_line + base );
+ base &= 0xfffffffc;
+ *out_ptr ++ = *( in_line + base + 3 );
}
-
- // Now update the frame
- mlt_properties_set_data( properties, "image", output, owidth * ( oheight + 1 ) * 2, ( mlt_destructor )mlt_pool_release, NULL );
- mlt_properties_set_int( properties, "width", owidth );
- mlt_properties_set_int( properties, "height", oheight );
-
- *image = output;
+ // Move to next output line
+ out_line += ostride;
}
+
+ // Now update the frame
+ mlt_properties_set_data( properties, "image", output, owidth * ( oheight + 1 ) * 2, ( mlt_destructor ) mlt_pool_release, NULL );
+ mlt_properties_set_int( properties, "width", owidth );
+ mlt_properties_set_int( properties, "height", oheight );
+ *image = output;
return 0;
}
int owidth = *width;
int oheight = *height;
char *interps = mlt_properties_get( properties, "rescale.interp" );
- int wanted_format = *format;
// Default from the scaler if not specifed on the frame
if ( interps == NULL )
}
// Let the producer know what we are actually requested to obtain
- if ( *format == mlt_image_yuv422 && strcmp( interps, "none" ) )
+ if ( strcmp( interps, "none" ) )
{
mlt_properties_set_int( properties, "rescale_width", *width );
mlt_properties_set_int( properties, "rescale_height", *height );
// Get rescale interpretation again, in case the producer wishes to override scaling
interps = mlt_properties_get( properties, "rescale.interp" );
- if ( *image != NULL && ( *format != mlt_image_yuv422 || ( iwidth != owidth || iheight != oheight ) ) )
+ if ( *image && strcmp( interps, "none" ) && ( iwidth != owidth || iheight != oheight ) )
{
- // If the colour space is correct and scaling is off, do nothing
- if ( *format == mlt_image_yuv422 && !strcmp( interps, "none" ) )
- {
- *width = iwidth;
- *height = iheight;
- }
- else if ( *format == mlt_image_yuv422 )
- {
- // Call the local scaler
- scaler_method( this, image, *format, mlt_image_yuv422, iwidth, iheight, owidth, oheight );
- *width = owidth;
- *height = oheight;
- }
- else if ( *format == mlt_image_rgb24 && wanted_format == mlt_image_rgb24 )
- {
- // Call the local scaler
- scaler_method( this, image, *format, mlt_image_rgb24, iwidth, iheight, owidth, oheight );
+ mlt_log_debug( MLT_FILTER_SERVICE( filter ), "%dx%d -> %dx%d (%s)\n",
+ iwidth, iheight, owidth, oheight, mlt_image_format_name( *format ) );
- // Return the output
- *width = owidth;
- *height = oheight;
- }
- else if ( *format == mlt_image_rgb24 || *format == mlt_image_rgb24a )
+ // If valid colorspace
+ if ( *format == mlt_image_yuv422 || *format == mlt_image_rgb24 ||
+ *format == mlt_image_rgb24a || *format == mlt_image_opengl )
{
- // Call the local scaler
- scaler_method( this, image, *format, mlt_image_yuv422, iwidth, iheight, owidth, oheight );
-
- // Return the output
- *format = mlt_image_yuv422;
+ // Call the virtual function
+ scaler_method( this, image, format, iwidth, iheight, owidth, oheight );
*width = owidth;
*height = oheight;
}
- else
- {
- *width = iwidth;
- *height = iheight;
- }
- if ( *width == owidth )
- {
- // Scale the alpha channel only if exists and not correct size
- int alpha_size = 0;
- mlt_properties_get_data( properties, "alpha", &alpha_size );
- if ( alpha_size > 0 && alpha_size != ( owidth * oheight ) && alpha_size != ( owidth * ( oheight + 1 ) ) )
- scale_alpha( this, iwidth, iheight, owidth, oheight );
- }
+ // Scale the alpha channel only if exists and not correct size
+ int alpha_size = 0;
+ mlt_properties_get_data( properties, "alpha", &alpha_size );
+ if ( alpha_size > 0 && alpha_size != ( owidth * oheight ) && alpha_size != ( owidth * ( oheight + 1 ) ) )
+ scale_alpha( this, iwidth, iheight, owidth, oheight );
}
else
{
projects / mlt / blobdiff