tests/checkasm/lpc.c

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include "libavutil/avassert.h"
  20 #include "libavutil/mem_internal.h"
  21
  22 #include "libavcodec/lpc.h"
  23
  24 #include "checkasm.h"
  25
  26 #define randomize_int32(buf, len)                                         \
  27     do {                                                                  \
  28         for (int i = 0; i < len; i++) {                                   \
  29             int32_t f = ((int)(UINT32_MAX >> 17)) - ((int)(rnd() >> 16)); \
  30             buf[i] = f;                                                   \
  31         }                                                                 \
  32     } while (0)
  33
  34 #define EPS 0.005
  35
  36 static void test_window(int len)
  37 {
  38     LOCAL_ALIGNED(16, int32_t, src, [5000]);
  39     LOCAL_ALIGNED(16, double, dst0, [5000]);
  40     LOCAL_ALIGNED(16, double, dst1, [5000]);
  41
  42     declare_func(void, const int32_t *in, ptrdiff_t len, double *out);
  43
  44     randomize_int32(src, len);
  45
  46     call_ref(src, len, dst0);
  47     call_new(src, len, dst1);
  48
  49     for (int i = 0; i < len; i++) {
  50         if (!double_near_abs_eps(dst0[i], dst1[i], EPS)) {
  51             fprintf(stderr, "%d: %- .12f - %- .12f = % .12g\n",
  52                     i, dst0[i], dst1[i], dst0[i] - dst1[i]);
  53             fail();
  54             break;
  55         }
  56     }
  57
  58     bench_new(src, 4608 + (len & 1), dst1);
  59 }
  60
  61 static void test_compute_autocorr(ptrdiff_t len, int lag)
  62 {
  63     const double eps = EPS * (double)len;
  64     LOCAL_ALIGNED(32, double, src, [5000 + 2 + MAX_LPC_ORDER]);
  65     LOCAL_ALIGNED(16, double, dst0, [MAX_LPC_ORDER + 1]);
  66     LOCAL_ALIGNED(16, double, dst1, [MAX_LPC_ORDER + 1]);
  67
  68     declare_func(void, const double *in, ptrdiff_t len, int lag, double *out);
  69
  70     av_assert0(lag >= 0 && lag <= MAX_LPC_ORDER);
  71
  72     for (int i = 0; i < MAX_LPC_ORDER; i++)
  73         src[i] = 0.;
  74
  75     src += MAX_LPC_ORDER;
  76
  77     for (int i = 0; i < 5000 + 2; i++) {
  78         src[i] = (double)rnd() / (double)UINT_MAX;
  79     }
  80
  81     call_ref(src, len, lag, dst0);
  82     call_new(src, len, lag, dst1);
  83
  84     for (size_t i = 0; i <= lag; i++) {
  85         if (!double_near_abs_eps(dst0[i], dst1[i], eps)) {
  86             fprintf(stderr, "%zu: %- .12f - %- .12f = % .12g\n",
  87                     i, dst0[i], dst1[i], dst0[i] - dst1[i]);
  88             fail();
  89             break;
  90         }
  91     }
  92
  93     bench_new(src, 4608 + (len & 1), lag, dst1);
  94 }
  95
  96 void checkasm_check_lpc(void)
  97 {
  98     LPCContext ctx;
  99     int len = 2000 + rnd() % 3000;
 100     static const int lags[] = { 8, 12, };
 101
 102     ff_lpc_init(&ctx, 32, 16, FF_LPC_TYPE_DEFAULT);
 103
 104     if (check_func(ctx.lpc_apply_welch_window, "apply_welch_window_even")) {
 105         test_window(len & ~1);
 106     }
 107     report("apply_welch_window_even");
 108
 109     if (check_func(ctx.lpc_apply_welch_window, "apply_welch_window_odd")) {
 110         test_window(len | 1);
 111     }
 112     report("apply_welch_window_odd");
 113     ff_lpc_end(&ctx);
 114
 115     for (size_t i = 0; i < FF_ARRAY_ELEMS(lags); i++) {
 116         ff_lpc_init(&ctx, len, lags[i], FF_LPC_TYPE_DEFAULT);
 117         if (check_func(ctx.lpc_compute_autocorr, "autocorr_%d_even", lags[i]))
 118             test_compute_autocorr(len & ~1, lags[i]);
 119 #if !ARCH_X86
 120         if (check_func(ctx.lpc_compute_autocorr, "autocorr_%d_odd", lags[i]))
 121             test_compute_autocorr(len | 1, lags[i]);
 122 #endif
 123         ff_lpc_end(&ctx);
 124     }
 125     report("compute_autocorr");
 126 }