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134 lines
5.2 KiB
134 lines
5.2 KiB
/*
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* filter_affine.c -- affine 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_affine.h"
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#include <framework/mlt.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 properties
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mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
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// Get the image
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int error = mlt_frame_get_image( this, image, format, width, height, 0 );
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// Only process if we have no error and a valid colour space
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if ( error == 0 && *format == mlt_image_yuv422 )
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{
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mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );
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mlt_transition transition = mlt_properties_get_data( properties, "transition", NULL );
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mlt_frame a_frame = NULL;
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if ( producer == NULL )
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{
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char *background = mlt_properties_get( properties, "background" );
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producer = mlt_factory_producer( "fezzik", background );
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mlt_properties_set_data( properties, "producer", producer, 0, (mlt_destructor)mlt_producer_close, NULL );
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}
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if ( transition == NULL )
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{
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transition = mlt_factory_transition( "affine", NULL );
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mlt_properties_set_data( properties, "transition", transition, 0, (mlt_destructor)mlt_transition_close, NULL );
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}
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if ( producer != NULL && transition != NULL )
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{
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char *name = mlt_properties_get( properties, "_unique_id" );
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mlt_position position = mlt_properties_get_position( MLT_FRAME_PROPERTIES( this ), name );
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mlt_properties frame_properties = MLT_FRAME_PROPERTIES( this );
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double consumer_ar = mlt_properties_get_double( frame_properties, "consumer_aspect_ratio" );
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mlt_properties_set_position( MLT_TRANSITION_PROPERTIES( transition ), "in", mlt_filter_get_in( filter ) );
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mlt_properties_set_position( MLT_TRANSITION_PROPERTIES( transition ), "out", mlt_filter_get_out( filter ) );
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mlt_producer_seek( producer, position );
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mlt_frame_set_position( this, position );
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mlt_properties_pass( MLT_PRODUCER_PROPERTIES( producer ), properties, "producer." );
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mlt_properties_pass( MLT_TRANSITION_PROPERTIES( transition ), properties, "transition." );
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mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &a_frame, 0 );
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mlt_properties_set( MLT_FRAME_PROPERTIES( a_frame ), "rescale.interp", "nearest" );
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mlt_properties_set_int( MLT_FRAME_PROPERTIES( a_frame ), "distort", 1 );
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// Special case - aspect_ratio = 0
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if ( mlt_properties_get_double( frame_properties, "aspect_ratio" ) == 0 )
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mlt_properties_set_double( frame_properties, "aspect_ratio", consumer_ar );
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if ( mlt_properties_get_double( MLT_FRAME_PROPERTIES( a_frame ), "aspect_ratio" ) == 0 )
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mlt_properties_set_double( MLT_FRAME_PROPERTIES( a_frame ), "aspect_ratio", consumer_ar );
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mlt_properties_set_double( MLT_FRAME_PROPERTIES( a_frame ), "consumer_aspect_ratio", consumer_ar );
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mlt_transition_process( transition, a_frame, this );
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mlt_frame_get_image( a_frame, image, format, width, height, writable );
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mlt_properties_set_data( frame_properties, "affine_frame", a_frame, 0, (mlt_destructor)mlt_frame_close, NULL );
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mlt_properties_set_data( frame_properties, "image", *image, *width * *height * 2, NULL, NULL );
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mlt_properties_set_data( frame_properties, "alpha", mlt_frame_get_alpha_mask( a_frame ), *width * *height, NULL, NULL );
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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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// Get the properties of the frame
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mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
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// Get a unique name to store the frame position
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char *name = mlt_properties_get( MLT_FILTER_PROPERTIES( this ), "_unique_id" );
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// Assign the current position to the name
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mlt_properties_set_position( properties, name, mlt_frame_get_position( frame ) - mlt_filter_get_in( this ) );
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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_affine_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 ), "background", "colour:black" );
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mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "transition.rotate_x", "10" );
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}
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return this;
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}
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