* Copyright (C) 2003-2004 Ushodaya Enterprises Limited
* Author: Charles Yates <charles.yates@pandora.be>
*
- * 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_brightness.h"
-
+#include <framework/mlt_filter.h>
#include <framework/mlt_frame.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
+#define CLAMP( x, min, max ) (x) < (min) ? (min) : (x) > (max) ? (max) : (x)
+
/** Do it :-).
*/
static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
{
- mlt_frame_get_image( this, image, format, width, height, 1 );
- uint8_t *p = *image;
- uint8_t *q = *image + *width * *height * 2;
+ // Get the image
+ *format = mlt_image_yuv422;
+ int error = mlt_frame_get_image( this, image, format, width, height, 1 );
- // Get the brightness level
- double level = mlt_properties_get_double( mlt_frame_properties( this ), "brightness.level" );
-
- while ( p != q )
+ // Only process if we have no error and a valid colour space
+ if ( error == 0 )
{
- float x = (float) *p * level;
- *p = x < 16 ? 16 : x > 235 ? 235 : x;
- p += 2;
+ // Get the brightness level
+ double level = mlt_properties_get_double( MLT_FRAME_PROPERTIES( this ), "brightness" );
+
+ // Only process if level is something other than 1
+ if ( level != 1.0 )
+ {
+ int i = *width * *height + 1;
+ uint8_t *p = *image;
+ int32_t m = level * ( 1 << 16 );
+ int32_t n = 128 * ( ( 1 << 16 ) - m );
+
+ while ( --i )
+ {
+ p[0] = CLAMP( (p[0] * m) >> 16, 16, 235 );
+ p[1] = CLAMP( (p[1] * m + n) >> 16, 16, 240 );
+ p += 2;
+ }
+ }
}
- return 0;
+ return error;
}
/** Filter processing.
static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
{
- double level = fabs( mlt_properties_get_double( mlt_filter_properties( this ), "start" ) );
-
+ // Get the starting brightness level
+ double level = fabs( mlt_properties_get_double( MLT_FILTER_PROPERTIES( this ), "start" ) );
+
// If there is an end adjust gain to the range
- if ( mlt_properties_get( mlt_filter_properties( this ), "end" ) != NULL )
+ if ( mlt_properties_get( MLT_FILTER_PROPERTIES( this ), "end" ) != NULL )
{
// Determine the time position of this frame in the transition duration
- mlt_position in = mlt_filter_get_in( this );
- mlt_position out = mlt_filter_get_out( this );
- mlt_position time = mlt_frame_get_position( frame );
- double position = ( double )( time - in ) / ( double )( out - in + 1 );
- double end = fabs( mlt_properties_get_double( mlt_filter_properties( this ), "end" ) );
- level += ( end - level ) * position;
+ double end = fabs( mlt_properties_get_double( MLT_FILTER_PROPERTIES( this ), "end" ) );
+ level += ( end - level ) * mlt_filter_get_progress( this, frame );
}
+
+ // Push the frame filter
+ mlt_properties_set_double( MLT_FRAME_PROPERTIES( frame ), "brightness", level );
mlt_frame_push_get_image( frame, filter_get_image );
- mlt_properties_set_double( mlt_frame_properties( frame ), "brightness.level", level );
+
return frame;
}
/** Constructor for the filter.
*/
-mlt_filter filter_brightness_init( char *arg )
+mlt_filter filter_brightness_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
{
- mlt_filter this = calloc( sizeof( struct mlt_filter_s ), 1 );
+ mlt_filter this = mlt_filter_new( );
if ( this != NULL )
{
- mlt_filter_init( this, NULL );
this->process = filter_process;
- if ( arg != NULL )
- mlt_properties_set_double( mlt_filter_properties( this ), "start", atof( arg ) );
+ mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "start", arg == NULL ? "1" : arg );
}
return this;
}
projects / mlt / blobdiff