* Copyright (C) 2003-2004 Ushodaya Enterprises Limited
* Author: Dan Dennedy <dan@dennedy.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This program is distributed in the hope that it will be useful,
+ * This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include "filter_rescale.h"
-
+#include <framework/mlt_filter.h>
#include <framework/mlt_frame.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 );
+static void scale_alpha( mlt_frame this, 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 )
{
// Get the properties
- mlt_properties properties = mlt_frame_properties( this );
+ mlt_properties properties = MLT_FRAME_PROPERTIES( this );
// Get the rescaling interpolsation
char *interps = mlt_properties_get( properties, "rescale.interp" );
// Return the output
*image = mlt_properties_get_data( properties, "image", NULL );
+
+ // 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 ) )
+ scale_alpha( this, iwidth, iheight, owidth, oheight );
}
else if ( iformat == mlt_image_rgb24 || iformat == mlt_image_rgb24a )
{
uint8_t *alpha = mlt_pool_alloc( iwidth * ( iheight + 1 ) );
// Convert the image and extract alpha
- mlt_convert_rgb24a_to_yuv422( *image, iwidth, iheight, iwidth * 2, output, alpha );
+ mlt_convert_rgb24a_to_yuv422( *image, iwidth, iheight, iwidth * 4, output, alpha );
mlt_properties_set_data( properties, "alpha", alpha, iwidth * ( iheight + 1 ), ( mlt_destructor )mlt_pool_release, NULL );
+
+ scale_alpha( this, iwidth, iheight, owidth, oheight );
}
else
{
// No alpha to extract
- mlt_convert_rgb24_to_yuv422( *image, iwidth, iheight, iwidth * 2, output );
+ mlt_convert_rgb24_to_yuv422( *image, iwidth, iheight, iwidth * 3, output );
}
+ mlt_properties_set_data( properties, "image", output, iwidth * ( iheight + 1 ) * 2, ( mlt_destructor )mlt_pool_release, NULL );
+
// Scale the frame
- mlt_frame_rescale_yuv422( this, owidth, oheight );
-
- // Return the output
- *image = mlt_properties_get_data( properties, "image", NULL );
+ output = mlt_frame_rescale_yuv422( this, owidth, oheight );
+
}
else
{
mlt_convert_rgb24a_to_yuv422( *image, owidth, oheight, owidth * 4, output, alpha );
mlt_properties_set_data( properties, "alpha", alpha, owidth * ( oheight + 1 ), ( mlt_destructor )mlt_pool_release, NULL );
+
+ scale_alpha( this, iwidth, iheight, owidth, oheight );
}
else
{
return 0;
}
+static void scale_alpha( mlt_frame this, int iwidth, int iheight, int owidth, int oheight )
+{
+ // Scale the alpha
+ uint8_t *output = NULL;
+ uint8_t *input = mlt_frame_get_alpha_mask( this );
+
+ if ( input != NULL )
+ {
+ uint8_t *out_line;
+ int x, y;
+ int ox = ( iwidth << 10 ) / owidth;
+ int oy = ( iheight << 10 ) / oheight;
+
+ output = mlt_pool_alloc( owidth * oheight );
+ out_line = output;
+
+ // Loop for the entirety of our output height.
+ for ( y = 0; y < oheight; y ++ )
+ for ( x = 0; x < owidth; x ++ )
+ *out_line ++ = *( input + ( ( 512 + ( y * oy * iwidth ) + x * ox ) >> 10 ) );
+
+ // Set it back on the frame
+ mlt_properties_set_data( MLT_FRAME_PROPERTIES( this ), "alpha", output, owidth * oheight, mlt_pool_release, NULL );
+ }
+}
+
/** Do it :-).
*/
static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
{
// Get the frame properties
- mlt_properties properties = mlt_frame_properties( this );
+ mlt_properties properties = MLT_FRAME_PROPERTIES( this );
// Get the filter from the stack
mlt_filter filter = mlt_frame_pop_service( this );
// Get the filter properties
- mlt_properties filter_properties = mlt_filter_properties( filter );
+ mlt_properties filter_properties = MLT_FILTER_PROPERTIES( filter );
// Get the image scaler method
image_scaler scaler_method = mlt_properties_get_data( filter_properties, "method", NULL );
}
// There can be problems with small images - avoid them (by hacking - gah)
- if ( *width >= 2 && *height >= 6 )
+ if ( *width >= 6 && *height >= 6 )
{
int iwidth = *width;
int iheight = *height;
// Default from the scaler if not specifed on the frame
if ( interps == NULL )
{
- interps = mlt_properties_get( mlt_filter_properties( filter ), "interpolation" );
+ interps = mlt_properties_get( MLT_FILTER_PROPERTIES( filter ), "interpolation" );
mlt_properties_set( properties, "rescale.interp", interps );
}
else
{
// When no scaling is requested, revert the requested dimensions if possible
- mlt_properties_set_int( properties, "rescale_width", ( iwidth / 2 ) * 2 );
+ mlt_properties_set_int( properties, "rescale_width", iwidth );
mlt_properties_set_int( properties, "rescale_height", iheight );
}
-
+
+ // Deinterlace if height is changing to prevent fields mixing on interpolation
+ // One exception: non-interpolated, integral scaling
+ if ( iheight != oheight && ( strcmp( interps, "nearest" ) || ( iheight % oheight != 0 ) ) )
+ mlt_properties_set_int( properties, "consumer_deinterlace", 1 );
+
// Get the image as requested
mlt_frame_get_image( this, image, format, &iwidth, &iheight, writable );
-
+
// Get rescale interpretation again, in case the producer wishes to override scaling
interps = mlt_properties_get( properties, "rescale.interp" );
return 0;
}
-static uint8_t *producer_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 );
-}
-
/** Filter processing.
*/
// Push the get image method
mlt_frame_push_service( frame, filter_get_image );
- // Set alpha call back
- frame->get_alpha_mask = producer_get_alpha_mask;
-
return frame;
}
/** Constructor for the filter.
*/
-mlt_filter filter_rescale_init( char *arg )
+mlt_filter filter_rescale_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
{
// Create a new scaler
mlt_filter this = mlt_filter_new( );
if ( this != NULL )
{
// Get the properties
- mlt_properties properties = mlt_filter_properties( this );
+ mlt_properties properties = MLT_FILTER_PROPERTIES( this );
// Set the process method
this->process = filter_process;
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