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/*
* 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 "config.h"
#include "common.h"
#include "pixelutils.h"
#if CONFIG_PIXELUTILS
#include "x86/pixelutils.h"
static av_always_inline int sad_wxh(const uint8_t *src1, ptrdiff_t stride1,
const uint8_t *src2, ptrdiff_t stride2,
int w, int h)
{
int x, y, sum = 0;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++)
sum += abs(src1[x] - src2[x]);
src1 += stride1;
src2 += stride2;
}
return sum;
}
#define DECLARE_BLOCK_FUNCTIONS(size) \
static int block_sad_##size##x##size##_c(const uint8_t *src1, ptrdiff_t stride1, \
const uint8_t *src2, ptrdiff_t stride2) \
{ \
return sad_wxh(src1, stride1, src2, stride2, size, size); \
}
DECLARE_BLOCK_FUNCTIONS(2)
DECLARE_BLOCK_FUNCTIONS(4)
DECLARE_BLOCK_FUNCTIONS(8)
DECLARE_BLOCK_FUNCTIONS(16)
static const av_pixelutils_sad_fn sad_c[] = {
block_sad_2x2_c,
block_sad_4x4_c,
block_sad_8x8_c,
block_sad_16x16_c,
};
#endif /* CONFIG_PIXELUTILS */
av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits, int aligned, void *log_ctx)
{
#if !CONFIG_PIXELUTILS
av_log(log_ctx, AV_LOG_ERROR, "pixelutils support is required "
"but libavutil is not compiled with it\n");
return NULL;
#else
av_pixelutils_sad_fn sad[FF_ARRAY_ELEMS(sad_c)];
memcpy(sad, sad_c, sizeof(sad));
if (w_bits < 1 || w_bits > FF_ARRAY_ELEMS(sad) ||
h_bits < 1 || h_bits > FF_ARRAY_ELEMS(sad))
return NULL;
if (w_bits != h_bits) // only squared sad for now
return NULL;
#if ARCH_X86
ff_pixelutils_sad_init_x86(sad, aligned);
#endif
return sad[w_bits - 1];
#endif
}
#ifdef TEST
#define W1 320
#define H1 240
#define W2 640
#define H2 480
static int run_single_test(const char *test,
const uint8_t *block1, ptrdiff_t stride1,
const uint8_t *block2, ptrdiff_t stride2,
int align, int n)
{
int out, ref;
av_pixelutils_sad_fn f_ref = sad_c[n - 1];
av_pixelutils_sad_fn f_out = av_pixelutils_get_sad_fn(n, n, align, NULL);
switch (align) {
case 0: block1++; block2++; break;
case 1: block2++; break;
case 2: break;
}
out = f_out(block1, stride1, block2, stride2);
ref = f_ref(block1, stride1, block2, stride2);
printf("[%s] [%c%c] SAD [%s] %dx%d=%d ref=%d\n",
out == ref ? "OK" : "FAIL",
align ? 'A' : 'U', align == 2 ? 'A' : 'U',
test, 1<<n, 1<<n, out, ref);
return out != ref;
}
static int run_test(const char *test,
const uint8_t *b1, const uint8_t *b2)
{
int i, a, ret = 0;
for (a = 0; a < 3; a++) {
const uint8_t *block1 = b1;
const uint8_t *block2 = b2;
switch (a) {
case 0: block1++; block2++; break;
case 1: block2++; break;
case 2: break;
}
for (i = 1; i <= FF_ARRAY_ELEMS(sad_c); i++) {
int r = run_single_test(test, b1, W1, b2, W2, a, i);
if (r)
ret = r;
}
}
return ret;
}
int main(void)
{
int i, align, ret;
uint8_t *buf1 = av_malloc(W1*H1);
uint8_t *buf2 = av_malloc(W2*H2);
uint32_t state = 0;
if (!buf1 || !buf2) {
fprintf(stderr, "malloc failure\n");
ret = 1;
goto end;
}
#define RANDOM_INIT(buf, size) do { \
int k; \
for (k = 0; k < size; k++) { \
state = state * 1664525 + 1013904223; \
buf[k] = state>>24; \
} \
} while (0)
/* Normal test with different strides */
RANDOM_INIT(buf1, W1*H1);
RANDOM_INIT(buf2, W2*H2);
ret = run_test("random", buf1, buf2);
if (ret < 0)
goto end;
/* Check for maximum SAD */
memset(buf1, 0xff, W1*H1);
memset(buf2, 0x00, W2*H2);
ret = run_test("max", buf1, buf2);
if (ret < 0)
goto end;
/* Check for minimum SAD */
memset(buf1, 0x90, W1*H1);
memset(buf2, 0x90, W2*H2);
ret = run_test("min", buf1, buf2);
if (ret < 0)
goto end;
/* Exact buffer sizes, to check for overreads */
for (i = 1; i <= 4; i++) {
for (align = 0; align < 3; align++) {
int size1, size2;
av_freep(&buf1);
av_freep(&buf2);
size1 = size2 = 1 << (i << 1);
switch (align) {
case 0: size1++; size2++; break;
case 1: size2++; break;
case 2: break;
}
buf1 = av_malloc(size1);
buf2 = av_malloc(size2);
if (!buf1 || !buf2) {
fprintf(stderr, "malloc failure\n");
ret = 1;
goto end;
}
RANDOM_INIT(buf1, size1);
RANDOM_INIT(buf2, size2);
ret = run_single_test("small", buf1, 1<<i, buf2, 1<<i, align, i);
if (ret < 0)
goto end;
}
}
end:
av_free(buf1);
av_free(buf2);
return ret;
}
#endif /* TEST */
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