mirror of
https://github.com/game-stop/veejay.git
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134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
/*
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* Linux VeeJay
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*
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* Copyright(C)2002 Niels Elburg <elburg@hio.hen.nl>
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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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#include <stdint.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <libvjmem/vjmem.h>
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#include "fibdownscale.h"
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vj_effect *fibdownscale_init(int w, int h)
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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 = 2;
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ve->description = "Fibonacci Downscaler";
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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->defaults[0] = 0;
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ve->defaults[1] = 1;
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ve->limits[0][0] = 0;
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ve->limits[0][1] = 1;
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ve->limits[1][0] = 1;
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ve->limits[1][1] = 8;
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ve->sub_format = 0;
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ve->extra_frame = 0;
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ve->param_description = vje_build_param_list( ve->num_params, "Mode", "Fib" );
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ve->has_user =0;
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return ve;
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}
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void fibdownscale_apply(VJFrame *frame, VJFrame *frame2, int width,
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int height, int n)
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{
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if (n == 0)
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_fibdownscale_apply(frame, frame2, width, height);
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if (n == 1)
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_fibrectangle_apply(frame, frame2, width, height);
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}
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void _fibdownscale_apply(VJFrame *frame, VJFrame *frame2, int width,
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int height)
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{
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unsigned i, f1;
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unsigned int len = frame->len / 2;
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unsigned int uv_len = frame->uv_len / 2;
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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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/* do fib over half of image. (now we have 2 squares in upper half) */
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for (i = 2; i < len; i++) {
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f1 = (i + 1) + (i - 1);
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Y[i] = Y2[f1];
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}
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/* copy over first half (we could use veejay_memcpy) */
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// for (i = len; i < (width * height); i++) {
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// Y[i] = Y[i - len];
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// }
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veejay_memcpy( Y + len, Y, len );
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/* do the same thing for UV to get correct image */
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for (i = 2; i < uv_len; i++) {
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f1 = (i + 1) + (i - 1);
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Cb[i] = Cb2[f1];
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Cr[i] = Cr2[f1];
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}
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veejay_memcpy( Cb + uv_len, Cb , uv_len );
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veejay_memcpy( Cr + uv_len, Cr , uv_len );
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}
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void _fibrectangle_apply(VJFrame *frame, VJFrame *frame2, int width,
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int height)
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{
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unsigned int i, f1;
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const uint32_t len = frame->len /2;
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const uint32_t uv_len = frame->uv_len/2;
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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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for (i = 2; i < len; i++) {
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f1 = (i - 1) + (i - 2);
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// if (f1 < len)
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Y[i] = Y2[f1];
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// else
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// Y[i] = Y[(f1 - len)];
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}
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for (i = 2; i < uv_len; i++) {
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f1 = (i - 1) + (i - 2);
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// if (f1 < len) {
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Cb[i] = Cb2[f1];
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Cr[i] = Cr2[f1];
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// } else {
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// Cb[i] = Cb2[f1 - len];
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// Cr[i] = Cr2[f1 - len];
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// }
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}
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}
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void fibdownscale_free(){}
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