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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 General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU 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 "libavutil/avassert.h"
#include "libavutil/mem_internal.h"
#include "libavcodec/lpc.h"
#include "checkasm.h"
#define randomize_int32(buf, len) \
do { \
for (int i = 0; i < len; i++) { \
int32_t f = ((int)(UINT32_MAX >> 17)) - ((int)(rnd() >> 16)); \
buf[i] = f; \
} \
} while (0)
#define EPS 0.005
static void test_window(int len)
{
LOCAL_ALIGNED(16, int32_t, src, [5000]);
LOCAL_ALIGNED(16, double, dst0, [5000]);
LOCAL_ALIGNED(16, double, dst1, [5000]);
declare_func(void, const int32_t *in, ptrdiff_t len, double *out);
randomize_int32(src, len);
call_ref(src, len, dst0);
call_new(src, len, dst1);
for (int i = 0; i < len; i++) {
if (!double_near_abs_eps(dst0[i], dst1[i], EPS)) {
fprintf(stderr, "%d: %- .12f - %- .12f = % .12g\n",
i, dst0[i], dst1[i], dst0[i] - dst1[i]);
fail();
break;
}
}
bench_new(src, 4608 + (len & 1), dst1);
}
static void test_compute_autocorr(ptrdiff_t len, int lag)
{
const double eps = EPS * (double)len;
LOCAL_ALIGNED(32, double, src, [5000 + 2 + MAX_LPC_ORDER]);
LOCAL_ALIGNED(16, double, dst0, [MAX_LPC_ORDER + 1]);
LOCAL_ALIGNED(16, double, dst1, [MAX_LPC_ORDER + 1]);
declare_func(void, const double *in, ptrdiff_t len, int lag, double *out);
av_assert0(lag >= 0 && lag <= MAX_LPC_ORDER);
for (int i = 0; i < MAX_LPC_ORDER; i++)
src[i] = 0.;
src += MAX_LPC_ORDER;
for (int i = 0; i < 5000 + 2; i++) {
src[i] = (double)rnd() / (double)UINT_MAX;
}
call_ref(src, len, lag, dst0);
call_new(src, len, lag, dst1);
for (size_t i = 0; i <= lag; i++) {
if (!double_near_abs_eps(dst0[i], dst1[i], eps)) {
fprintf(stderr, "%zu: %- .12f - %- .12f = % .12g\n",
i, dst0[i], dst1[i], dst0[i] - dst1[i]);
fail();
break;
}
}
bench_new(src, 4608 + (len & 1), lag, dst1);
}
void checkasm_check_lpc(void)
{
LPCContext ctx;
int len = 2000 + rnd() % 3000;
static const int lags[] = { 8, 12, };
ff_lpc_init(&ctx, 32, 16, FF_LPC_TYPE_DEFAULT);
if (check_func(ctx.lpc_apply_welch_window, "apply_welch_window_even")) {
test_window(len & ~1);
}
report("apply_welch_window_even");
if (check_func(ctx.lpc_apply_welch_window, "apply_welch_window_odd")) {
test_window(len | 1);
}
report("apply_welch_window_odd");
ff_lpc_end(&ctx);
for (size_t i = 0; i < FF_ARRAY_ELEMS(lags); i++) {
ff_lpc_init(&ctx, len, lags[i], FF_LPC_TYPE_DEFAULT);
if (check_func(ctx.lpc_compute_autocorr, "autocorr_%d_even", lags[i]))
test_compute_autocorr(len & ~1, lags[i]);
#if !ARCH_X86
if (check_func(ctx.lpc_compute_autocorr, "autocorr_%d_odd", lags[i]))
test_compute_autocorr(len | 1, lags[i]);
#endif
ff_lpc_end(&ctx);
}
report("compute_autocorr");
}
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