mirror of
https://github.com/game-stop/veejay.git
synced 2025-12-17 05:10:00 +01:00
301 lines
7.5 KiB
C
301 lines
7.5 KiB
C
/*
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* Linux VeeJay
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*
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* Copyright(C)2002 Niels Elburg <nwelburg@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License , or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 , USA.
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*/
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/*
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this effect takes lumaninance information of frame B (0=no displacement,255=max displacement)
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to extract distortion offsets for frame A.
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h_scale and v_scale can be used to limit the scaling factor.
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if the value is < 128, the pixels will be shifted to the left
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otherwise to the right.
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*/
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#include "common.h"
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#include <veejaycore/vjmem.h>
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#include "lumamask.h"
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#include "motionmap.h"
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typedef struct {
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uint8_t *buf[4];
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void *motionmap;
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int n__;
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int N__;
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} lumamask_t;
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vj_effect *lumamask_init(int width, int height)
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{
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vj_effect *ve = (vj_effect *) vj_calloc(sizeof(vj_effect));
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ve->num_params = 4;
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ve->defaults = (int *) vj_calloc(sizeof(int) * ve->num_params); /* default values */
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ve->limits[0] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* min */
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ve->limits[1] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* max */
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ve->limits[0][0] = 1;
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ve->limits[1][0] = width;
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ve->limits[0][1] = 1;
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ve->limits[1][1] = height;
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ve->limits[0][2] = 0;
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ve->limits[1][2] = 1;
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ve->limits[0][3] = 0;
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ve->limits[1][3] = 1;
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ve->defaults[0] = width/20;
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ve->defaults[1] = height/10;
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ve->defaults[2] = 0; // border
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ve->description = "Displacement Map";
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ve->motion = 1;
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ve->sub_format = 1;
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ve->extra_frame = 1;
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ve->has_user = 0;
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ve->param_description = vje_build_param_list(ve->num_params, "X displacement", "Y displacement", "Mode", "Update Alpha" );
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return ve;
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}
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int lumamask_requests_fx() {
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return VJ_IMAGE_EFFECT_MOTIONMAP_ID;
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}
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void lumamask_set_motionmap(void *ptr, void *priv) {
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lumamask_t* l = (lumamask_t*) ptr;
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l->motionmap = priv;
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}
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void *lumamask_malloc(int width, int height)
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{
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lumamask_t *l = (lumamask_t*) vj_calloc(sizeof(lumamask_t));
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if(!l) {
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return NULL;
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}
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l->buf[0] = (uint8_t*)vj_malloc( sizeof(uint8_t) * RUP8( width * height * 4) );
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if(!l->buf[0]) {
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free(l);
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return NULL;
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}
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veejay_memset( l->buf[0], pixel_Y_lo_, width * height );
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l->buf[1] = l->buf[0] + RUP8(width *height);
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veejay_memset( l->buf[1], 128, width * height );
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l->buf[2] = l->buf[1] + RUP8(width *height);
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veejay_memset( l->buf[2], 128, width * height );
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l->buf[3] = l->buf[2] + RUP8(width *height);
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veejay_memset( l->buf[3], 0, width * height );
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return (void*) l;
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}
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void lumamask_apply( void *ptr, VJFrame *frame, VJFrame *frame2, int *args ) {
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int v_scale = args[0];
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int h_scale = args[1];
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int border = args[2];
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int alpha = args[3];
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lumamask_t *l = (lumamask_t*) ptr;
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unsigned int x,y;
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int dx,dy,nx,ny;
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int tmp;
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int interpolate = 1;
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int tmp1 = v_scale;
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int tmp2 = h_scale;
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int motion = 0;
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const unsigned int width = frame->width;
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const unsigned int height = frame->height;
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const int len = frame->len;
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if( motionmap_active(l->motionmap) )
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{
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motionmap_scale_to(l->motionmap, width,height,1,1,&tmp1,&tmp2,&(l->n__),&(l->N__) );
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motion = 1;
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}
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else
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{
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l->n__ = 0;
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l->N__ = 0;
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}
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if( l->n__ == l->N__ || l->n__ == 0 )
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interpolate = 0;
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double w_ratio = (double) tmp1 / 128.0;
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double h_ratio = (double) tmp2 / 128.0;
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uint8_t *Y = frame->data[0];
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uint8_t *Cb= frame->data[1];
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uint8_t *Cr= frame->data[2];
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uint8_t *Y2 = frame2->data[0];
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uint8_t *Cb2 = frame2->data[1];
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uint8_t *Cr2 = frame2->data[2];
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uint8_t *aA = frame->data[3];
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uint8_t *aB = frame2->data[3];
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int strides[4] = { len, len, len ,( alpha ? len : 0 )};
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vj_frame_copy( frame->data, l->buf, strides );
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if( alpha == 0 )
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{
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if( border )
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{
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for(y=0; y < height; y++)
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{
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for(x=0; x < width ; x++)
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{
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// calculate new location of pixel
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tmp = Y2[(y*width+x)] - 128;
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// new x offset
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dx = w_ratio * tmp;
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// new y offset
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dy = h_ratio * tmp;
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// new pixel coordinates
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nx = x + dx;
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ny = y + dy;
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if( nx < 0 || ny < 0 || nx >= width || ny >= height )
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{
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Y[y*width+x] = 16;
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Cb[y*width+x] = 128;
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Cr[y*width+x] = 128;
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}
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else
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{
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Y[y*width+x] = Y2[ny * width + nx];
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Cb[y*width+x] = Cb2[ny * width + nx];
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Cr[y*width+x] = Cr2[ny * width + nx];
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}
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}
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}
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}
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else
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{
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for(y=0; y < height; y++)
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{
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for(x=0; x < width ; x++)
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{
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tmp = Y2[(y*width+x)] - 128;
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dx = w_ratio * tmp;
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dy = h_ratio * tmp;
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nx = x + dx;
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ny = y + dy;
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while( nx < 0 )
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nx += width;
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while( ny < 0 )
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ny += height;
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if( nx < 0 || ny < 0 || nx >= width || ny >= height )
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{
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Y[y*width+x] = 16;
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Cb[y*width+x] = 128;
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Cr[y*width+x] = 128;
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}
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else
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{
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Y[y*width+x] = Y2[ny * width + nx];
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Cb[y*width+x] = Cb2[ny * width + nx];
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Cr[y*width+x] = Cr2[ny * width + nx];
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}
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}
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}
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}
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}
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else /* write alpha */
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{
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if( border )
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{
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for(y=0; y < height; y++)
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{
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for(x=0; x < width ; x++)
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{
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// calculate new location of pixel
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tmp = Y2[(y*width+x)] - 128;
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// new x offset
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dx = w_ratio * tmp;
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// new y offset
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dy = h_ratio * tmp;
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// new pixel coordinates
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nx = x + dx;
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ny = y + dy;
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if( nx < 0 || ny < 0 || nx >= width || ny >= height )
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{
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Y[y*width+x] = 16;
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Cb[y*width+x] = 128;
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Cr[y*width+x] = 128;
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aA[y*width+x] = 0;
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}
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else
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{
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Y[y*width+x] = Y2[ny * width + nx];
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Cb[y*width+x] = Cb2[ny * width + nx];
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Cr[y*width+x] = Cr2[ny * width + nx];
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aA[y*width+x] = aB[ny * width + nx];
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}
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}
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}
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}
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else
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{
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for(y=0; y < height; y++)
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{
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for(x=0; x < width ; x++)
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{
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tmp = Y2[(y*width+x)] - 128;
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dx = w_ratio * tmp;
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dy = h_ratio * tmp;
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nx = x + dx;
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ny = y + dy;
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while( nx < 0 )
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nx += width;
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while( ny < 0 )
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ny += height;
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if( nx < 0 || ny < 0 || nx >= width || ny >= height )
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{
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Y[y*width+x] = 16;
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Cb[y*width+x] = 128;
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Cr[y*width+x] = 128;
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aA[y*width+x] = 0;
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}
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else
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{
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Y[y*width+x] = Y2[ny * width + nx];
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Cb[y*width+x] = Cb2[ny * width + nx];
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Cr[y*width+x] = Cr2[ny * width + nx];
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aA[y*width+x] = aB[ny*width+nx];
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}
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}
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}
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}
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}
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if( interpolate )
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motionmap_interpolate_frame( l->motionmap, frame, l->N__, l->n__ );
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if( motion )
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motionmap_store_frame( l->motionmap, frame );
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}
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void lumamask_free(void *ptr)
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{
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lumamask_t *l = (lumamask_t*) ptr;
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free(l->buf[0]);
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free(l);
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}
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