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/*
* Discrete wavelet transform
* Copyright (c) 2007 Kamil Nowosad
* Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <inttypes.h>
#include <stdio.h>
#include "libavutil/common.h"
#include "libavcodec/jpeg2000dwt.c"
#include "libavutil/lfg.h"
#define MAX_W 256
static int test_dwt(int *array, int *ref, int border[2][2], int decomp_levels, int type, int max_diff) {
int ret, j;
DWTContext s1={{{0}}}, *s= &s1;
int64_t err2 = 0;
ret = ff_jpeg2000_dwt_init(s, border, decomp_levels, type);
if (ret < 0) {
fprintf(stderr, "ff_jpeg2000_dwt_init failed\n");
return 1;
}
ret = ff_dwt_encode(s, array);
if (ret < 0) {
fprintf(stderr, "ff_dwt_encode failed\n");
return 1;
}
if (type == FF_DWT97_INT) {
// pre-scaling to simulate dequantization which places the binary point at 1 bit above from LSB
for (j = 0; j< s->linelen[decomp_levels-1][0] * s->linelen[decomp_levels-1][1]; j++)
array[j] <<= I_PRESHIFT;
}
ret = ff_dwt_decode(s, array);
if (ret < 0) {
fprintf(stderr, "ff_dwt_encode failed\n");
return 1;
}
for (j = 0; j<MAX_W * MAX_W; j++) {
if (FFABS(array[j] - (int64_t)ref[j]) > max_diff) {
fprintf(stderr, "missmatch at %d (%d != %d) decomp:%d border %d %d %d %d\n",
j, array[j], ref[j],decomp_levels, border[0][0], border[0][1], border[1][0], border[1][1]);
return 2;
}
err2 += (array[j] - ref[j]) * (int64_t)(array[j] - ref[j]);
array[j] = ref[j];
}
ff_dwt_destroy(s);
printf("%s, decomp:%2d border %3d %3d %3d %3d milli-err2:%9"PRId64"\n",
type == FF_DWT53 ? "5/3i" : "9/7i",
decomp_levels, border[0][0], border[0][1], border[1][0], border[1][1],
1000*err2 / ((border[0][1] - border[0][0])*(border[1][1] - border[1][0])));
return 0;
}
static int test_dwtf(float *array, float *ref, int border[2][2], int decomp_levels, float max_diff) {
int ret, j;
DWTContext s1={{{0}}}, *s= &s1;
double err2 = 0;
ret = ff_jpeg2000_dwt_init(s, border, decomp_levels, FF_DWT97);
if (ret < 0) {
fprintf(stderr, "ff_jpeg2000_dwt_init failed\n");
return 1;
}
ret = ff_dwt_encode(s, array);
if (ret < 0) {
fprintf(stderr, "ff_dwt_encode failed\n");
return 1;
}
ret = ff_dwt_decode(s, array);
if (ret < 0) {
fprintf(stderr, "ff_dwt_encode failed\n");
return 1;
}
for (j = 0; j<MAX_W * MAX_W; j++) {
if (FFABS(array[j] - ref[j]) > max_diff) {
fprintf(stderr, "missmatch at %d (%f != %f) decomp:%d border %d %d %d %d\n",
j, array[j], ref[j],decomp_levels, border[0][0], border[0][1], border[1][0], border[1][1]);
return 2;
}
err2 += (array[j] - ref[j]) * (array[j] - ref[j]);
array[j] = ref[j];
}
ff_dwt_destroy(s);
printf("9/7f, decomp:%2d border %3d %3d %3d %3d err2:%20.3f\n",
decomp_levels, border[0][0], border[0][1], border[1][0], border[1][1],
err2 / ((border[0][1] - border[0][0])*(border[1][1] - border[1][0])));
return 0;
}
static int array[MAX_W * MAX_W];
static int ref [MAX_W * MAX_W];
static float arrayf[MAX_W * MAX_W];
static float reff [MAX_W * MAX_W];
int main(void) {
AVLFG prng;
int i,j;
int border[2][2];
int ret, decomp_levels;
av_lfg_init(&prng, 1);
for (i = 0; i<MAX_W * MAX_W; i++)
arrayf[i] = reff[i] = array[i] = ref[i] = av_lfg_get(&prng) % 2048;
for (i = 0; i < 100; i++) {
for (j=0; j<4; j++)
border[j>>1][j&1] = av_lfg_get(&prng) % MAX_W;
if (border[0][0] >= border[0][1] || border[1][0] >= border[1][1])
continue;
decomp_levels = av_lfg_get(&prng) % FF_DWT_MAX_DECLVLS;
ret = test_dwt(array, ref, border, decomp_levels, FF_DWT53, 0);
if (ret)
return ret;
ret = test_dwt(array, ref, border, decomp_levels, FF_DWT97_INT, FFMIN(7+5*decomp_levels, 15+3*decomp_levels));
if (ret)
return ret;
ret = test_dwtf(arrayf, reff, border, decomp_levels, 0.05);
if (ret)
return ret;
}
return 0;
}
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