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129 lines
4.1 KiB
129 lines
4.1 KiB
/*
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* filter_luma.c -- luma 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_luma.h"
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#include <framework/mlt_factory.h>
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#include <framework/mlt_frame.h>
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#include <framework/mlt_producer.h>
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#include <framework/mlt_transition.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.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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int error = 0;
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mlt_filter filter = mlt_frame_pop_service( this );
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mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
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mlt_transition luma = mlt_properties_get_data( properties, "luma", NULL );
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mlt_frame b_frame = mlt_properties_get_data( properties, "frame", NULL );
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mlt_properties b_frame_props = b_frame ? MLT_FRAME_PROPERTIES( b_frame ) : NULL;
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int out = mlt_properties_get_int( properties, "period" );
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if ( out == 0 )
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out = 24;
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if ( luma == NULL )
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{
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char *resource = mlt_properties_get( properties, "resource" );
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luma = mlt_factory_transition( "luma", resource );
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if ( luma != NULL )
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{
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mlt_properties luma_properties = MLT_TRANSITION_PROPERTIES( luma );
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mlt_properties_set_int( luma_properties, "in", 0 );
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mlt_properties_set_int( luma_properties, "out", out );
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mlt_properties_set_int( luma_properties, "reverse", 1 );
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mlt_properties_set_data( properties, "luma", luma, 0, ( mlt_destructor )mlt_transition_close, NULL );
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}
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}
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if ( b_frame == NULL || mlt_properties_get_int( b_frame_props, "width" ) != *width || mlt_properties_get_int( b_frame_props, "height" ) != *height )
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{
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b_frame = mlt_frame_init( );
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mlt_properties_set_data( properties, "frame", b_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
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}
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if ( luma != NULL &&
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( mlt_properties_get( properties, "blur" ) != NULL ||
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(int)mlt_frame_get_position( this ) % ( out + 1 ) != out ) )
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{
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mlt_properties luma_properties = MLT_TRANSITION_PROPERTIES( luma );
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mlt_properties_pass( luma_properties, properties, "luma." );
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mlt_transition_process( luma, this, b_frame );
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}
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error = mlt_frame_get_image( this, image, format, width, height, 1 );
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if ( error == 0 )
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{
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mlt_properties a_props = MLT_FRAME_PROPERTIES( this );
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int size = 0;
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uint8_t *src = mlt_properties_get_data( a_props, "image", &size );
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uint8_t *dst = mlt_pool_alloc( size );
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if ( dst != NULL )
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{
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mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
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memcpy( dst, src, size );
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mlt_properties_set_data( b_props, "image", dst, size, mlt_pool_release, NULL );
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mlt_properties_set_int( b_props, "width", *width );
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mlt_properties_set_int( b_props, "height", *height );
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mlt_properties_set_int( b_props, "format", *format );
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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 filter on to the stack
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mlt_frame_push_service( frame, this );
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// Push the get_image on to the stack
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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_luma_init( void *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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mlt_properties properties = MLT_FILTER_PROPERTIES( this );
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this->process = filter_process;
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if ( arg != NULL )
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mlt_properties_set( properties, "resource", arg );
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}
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return this;
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}
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