+++ /dev/null
-/*
- * wave.c -- wave filter
- * Copyright (C) ?-2007 Leny Grisel <leny.grisel@laposte.net>
- * Copyright (C) 2007 Jean-Baptiste Mardelle <jb@ader.ch>
- *
- * 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>
-#include <string.h>
-
-// this is a utility function used by DoWave below
-static uint8_t getPoint(uint8_t *src, int w, int h, int x, int y, int z)
-{
- if (x<0) x+=-((-x)%w)+w; else if (x>=w) x=x%w;
- if (y<0) y+=-((-y)%h)+h; else if (y>=h) y=y%h;
- return src[(x+y*w)*4+z];
-}
-
-// the main meat of the algorithm lies here
-static void DoWave(uint8_t *src, int src_w, int src_h, uint8_t *dst, mlt_position position, int speed, int factor, int deformX, int deformY)
-{
- register int x, y;
- int decalY, decalX, z;
- float amplitude, phase, pulsation;
- register int uneven = src_w % 2;
- int w = (src_w - uneven ) / 2;
- amplitude = factor;
- pulsation = 0.5 / factor; // smaller means bigger period
- phase = position * pulsation * speed / 10; // smaller means longer
- for (y=0;y<src_h;y++) {
- decalX = deformX ? sin(pulsation * y + phase) * amplitude : 0;
- for (x=0;x<w;x++) {
- decalY = deformY ? sin(pulsation * x * 2 + phase) * amplitude : 0;
- for (z=0; z<4; z++)
- *dst++ = getPoint(src, w, src_h, (x+decalX), (y+decalY), z);
- }
- if (uneven) {
- decalY = sin(pulsation * x * 2 + phase) * amplitude;
- for (z=0; z<2; z++)
- *dst++ = getPoint(src, w, src_h, (x+decalX), (y+decalY), z);
- }
- }
-}
-
-static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
-{
- // Get the image
- int error = mlt_frame_get_image( this, image, format, width, height, 1 );
- mlt_position position = mlt_frame_get_position( this );
-
- // Only process if we have no error and a valid colour space
- if ( error == 0 && *format == mlt_image_yuv422 )
- {
- double factor = mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "wave" );
- int speed = mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "speed" );
- int deformX = mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "deformX" );
- int deformY = mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "deformY" );
- if (factor != 0) {
- int image_size = *width * (*height + 1) * 2;
- uint8_t *dest = mlt_pool_alloc (image_size);
- DoWave(*image, *width, (*height + 1), dest, position, speed, factor, deformX, deformY);
- memcpy(*image, dest, image_size);
- mlt_pool_release(dest);
- }
- }
-
- return error;
-}
-
-/** Filter processing.
-*/
-
-static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
-{
- // Get the starting wave level
- double wave = mlt_properties_get_double( MLT_FILTER_PROPERTIES( this ), "start" );
- int speed = mlt_properties_get_int( MLT_FILTER_PROPERTIES( this ), "speed" );
- int deformX = mlt_properties_get_int( MLT_FILTER_PROPERTIES( this ), "deformX" );
- int deformY = mlt_properties_get_int( MLT_FILTER_PROPERTIES( this ), "deformY" );
-
- // If there is an end adjust gain to the range
- 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" ) );
- wave += ( end - wave ) * position;
- }
-
- // Push the frame filter
- mlt_properties_set_double( MLT_FRAME_PROPERTIES( frame ), "wave", wave );
- mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "speed", speed );
- mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "deformX", deformX );
- mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "deformY", deformY );
- mlt_frame_push_get_image( frame, filter_get_image );
-
- return frame;
-}
-
-/** Constructor for the filter.
-*/
-
-mlt_filter filter_wave_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 ), "start", arg == NULL ? "10" : arg);
- mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "speed", arg == NULL ? "5" : arg);
- mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "deformX", arg == NULL ? "1" : arg);
- mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "deformY", arg == NULL ? "1" : arg);
- }
- return this;
-}
-
-
-
projects / melted / blobdiff