+++ /dev/null
-/*
- * filter_charcoal.c -- charcoal filter
- * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
- * Author: Charles Yates <charles.yates@pandora.be>
- *
- * 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 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
- * Lesser General Public License for more details.
- *
- * 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 <framework/mlt_filter.h>
-#include <framework/mlt_frame.h>
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-
-static inline int get_Y( uint8_t *pixels, int width, int height, int x, int y )
-{
- if ( x < 0 || x >= width || y < 0 || y >= height )
- {
- return 235;
- }
- else
- {
- uint8_t *pixel = pixels + y * ( width << 1 ) + ( x << 1 );
- return *pixel;
- }
-}
-
-static inline int sqrti( int n )
-{
- int p = 0;
- int q = 1;
- int r = n;
- int h = 0;
-
- while( q <= n )
- q = q << 2;
-
- while( q != 1 )
- {
- q = q >> 2;
- h = p + q;
- p = p >> 1;
- if ( r >= h )
- {
- p = p + q;
- r = r - h;
- }
- }
-
- return p;
-}
-
-/** 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 filter
- mlt_filter filter = mlt_frame_pop_service( this );
-
- // Get the image
- int error = mlt_frame_get_image( this, image, format, width, height, 1 );
-
- // Only process if we have no error and a valid colour space
- if ( error == 0 && *format == mlt_image_yuv422 )
- {
- // Get the charcoal scatter value
- int x_scatter = mlt_properties_get_double( MLT_FILTER_PROPERTIES( filter ), "x_scatter" );
- int y_scatter = mlt_properties_get_double( MLT_FILTER_PROPERTIES( filter ), "y_scatter" );
- float scale = mlt_properties_get_double( MLT_FILTER_PROPERTIES( filter ), "scale" );
- float mix = mlt_properties_get_double( MLT_FILTER_PROPERTIES( filter ), "mix" );
- int invert = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "invert" );
-
- // We'll process pixel by pixel
- int x = 0;
- int y = 0;
-
- // We need to create a new frame as this effect modifies the input
- uint8_t *temp = mlt_pool_alloc( *width * *height * 2 );
- uint8_t *p = temp;
- uint8_t *q = *image;
-
- // Calculations are carried out on a 3x3 matrix
- int matrix[ 3 ][ 3 ];
-
- // Used to carry out the matrix calculations
- int sum1;
- int sum2;
- float sum;
- int val;
-
- // Loop for each row
- for ( y = 0; y < *height; y ++ )
- {
- // Loop for each pixel
- for ( x = 0; x < *width; x ++ )
- {
- // Populate the matrix
- matrix[ 0 ][ 0 ] = get_Y( *image, *width, *height, x - x_scatter, y - y_scatter );
- matrix[ 0 ][ 1 ] = get_Y( *image, *width, *height, x , y - y_scatter );
- matrix[ 0 ][ 2 ] = get_Y( *image, *width, *height, x + x_scatter, y - y_scatter );
- matrix[ 1 ][ 0 ] = get_Y( *image, *width, *height, x - x_scatter, y );
- matrix[ 1 ][ 2 ] = get_Y( *image, *width, *height, x + x_scatter, y );
- matrix[ 2 ][ 0 ] = get_Y( *image, *width, *height, x - x_scatter, y + y_scatter );
- matrix[ 2 ][ 1 ] = get_Y( *image, *width, *height, x , y + y_scatter );
- matrix[ 2 ][ 2 ] = get_Y( *image, *width, *height, x + x_scatter, y + y_scatter );
-
- // Do calculations
- sum1 = (matrix[2][0] - matrix[0][0]) + ( (matrix[2][1] - matrix[0][1]) << 1 ) + (matrix[2][2] - matrix[2][0]);
- sum2 = (matrix[0][2] - matrix[0][0]) + ( (matrix[1][2] - matrix[1][0]) << 1 ) + (matrix[2][2] - matrix[2][0]);
- sum = scale * sqrti( sum1 * sum1 + sum2 * sum2 );
-
- // Assign value
- *p ++ = !invert ? ( sum >= 16 && sum <= 235 ? 251 - sum : sum < 16 ? 235 : 16 ) :
- ( sum >= 16 && sum <= 235 ? sum : sum < 16 ? 16 : 235 );
- q ++;
- val = 128 + mix * ( *q ++ - 128 );
- val = val < 16 ? 16 : val > 240 ? 240 : val;
- *p ++ = val;
- }
- }
-
- // Return the created image
- *image = temp;
-
- // Store new and destroy old
- mlt_properties_set_data( MLT_FRAME_PROPERTIES( this ), "image", *image, *width * *height * 2, mlt_pool_release, NULL );
- }
-
- return error;
-}
-
-/** Filter processing.
-*/
-
-static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
-{
- // Push the frame filter
- mlt_frame_push_service( frame, this );
- mlt_frame_push_get_image( frame, filter_get_image );
-
- return frame;
-}
-
-/** Constructor for the filter.
-*/
-
-mlt_filter filter_charcoal_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
-{
- mlt_filter this = mlt_filter_new( );
- if ( this != NULL )
- {
- this->process = filter_process;
- mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "x_scatter", "1" );
- mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "y_scatter", "1" );
- mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "scale", "1.5" );
- mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "mix", "0" );
- }
- return this;
-}
-
projects / melted / blobdiff