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102 lines
2.5 KiB
102 lines
2.5 KiB
/*
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* filter_sepia.c -- sepia filter
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* Copyright (C) 2003-2004 Ushodaya Enterprises Limited
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* Author: Charles Yates <charles.yates@pandora.be>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "filter_sepia.h"
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#include <framework/mlt_frame.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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/** Do it :-).
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*/
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static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
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{
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// Get the filter
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mlt_filter filter = mlt_frame_pop_service( this );
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// Get the image
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int error = mlt_frame_get_image( this, image, format, width, height, 1 );
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// Only process if we have no error and a valid colour space
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if ( error == 0 && *image && *format == mlt_image_yuv422 )
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{
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// We modify the whole image
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uint8_t *p = *image;
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int h = *height;
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int uneven = *width % 2;
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int w = ( *width - uneven ) / 2;
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int t;
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// Get u and v values
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int u = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "u" );
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int v = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "v" );
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// Loop through image
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while( h -- )
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{
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t = w;
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while( t -- )
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{
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p ++;
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*p ++ = u;
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p ++;
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*p ++ = v;
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}
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if ( uneven )
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{
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p ++;
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*p ++ = u;
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}
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}
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}
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return error;
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}
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/** Filter processing.
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*/
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static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
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{
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// Push the frame filter
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mlt_frame_push_service( frame, this );
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mlt_frame_push_get_image( frame, filter_get_image );
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return frame;
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}
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/** Constructor for the filter.
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*/
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mlt_filter filter_sepia_init( char *arg )
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{
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mlt_filter this = mlt_filter_new( );
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if ( this != NULL )
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{
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this->process = filter_process;
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mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "u", "75" );
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mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "v", "150" );
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}
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return this;
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}
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