FFmpeg
af_afir.c
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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 "config.h"
20 
21 #include <float.h>
22 #include <stdint.h>
23 
24 #include "libavfilter/af_afir.h"
25 #include "libavutil/internal.h"
26 #include "libavutil/mem_internal.h"
27 #include "checkasm.h"
28 
29 #define LEN 256
30 
31 #define randomize_buffer(buf) \
32 do { \
33  int i; \
34  double bmg[2], stddev = 10.0, mean = 0.0; \
35  \
36  for (i = 0; i < LEN*2+8; i += 2) { \
37  av_bmg_get(&checkasm_lfg, bmg); \
38  buf[i] = bmg[0] * stddev + mean; \
39  buf[i + 1] = bmg[1] * stddev + mean; \
40  } \
41 } while(0);
42 
43 static void test_fcmul_add(const float *src0, const float *src1, const float *src2)
44 {
45  LOCAL_ALIGNED_32(float, cdst, [LEN*2+8]);
46  LOCAL_ALIGNED_32(float, odst, [LEN*2+8]);
47  int i;
48 
49  declare_func(void, float *sum, const float *t, const float *c,
50  ptrdiff_t len);
51 
52  memcpy(cdst, src0, (LEN*2+8) * sizeof(float));
53  memcpy(odst, src0, (LEN*2+8) * sizeof(float));
54  call_ref(cdst, src1, src2, LEN);
55  call_new(odst, src1, src2, LEN);
56  for (i = 0; i <= LEN*2; i++) {
57  int idx = i & ~1;
58  float cre = src2[idx];
59  float cim = src2[idx + 1];
60  float tre = src1[idx];
61  float tim = src1[idx + 1];
62  double t = fabs(src0[i]) +
63  fabs(tre) + fabs(tim) + fabs(cre) + fabs(cim) +
64  fabs(tre * cre) + fabs(tim * cim) +
65  fabs(tre * cim) + fabs(tim * cre) +
66  fabs(tre * cre - tim * cim) +
67  fabs(tre * cim + tim * cre) +
68  fabs(cdst[i]) + 1.0;
69  if (!float_near_abs_eps(cdst[i], odst[i], t * 2 * FLT_EPSILON)) {
70  fprintf(stderr, "%d: %- .12f - %- .12f = % .12g\n",
71  i, cdst[i], odst[i], cdst[i] - odst[i]);
72  fail();
73  break;
74  }
75  }
76  memcpy(odst, src0, (LEN*2+8) * sizeof(float));
77  bench_new(odst, src1, src2, LEN);
78 }
79 
81 {
82  LOCAL_ALIGNED_32(float, src0, [LEN*2+8]);
83  LOCAL_ALIGNED_32(float, src1, [LEN*2+8]);
84  LOCAL_ALIGNED_32(float, src2, [LEN*2+8]);
85  AudioFIRDSPContext fir = { 0 };
86 
87  ff_afir_init(&fir);
88 
91  randomize_buffer(src2);
92 
93  if (check_func(fir.fcmul_add, "fcmul_add"))
94  test_fcmul_add(src0, src1, src2);
95  report("fcmul_add");
96 }
mem_internal.h
checkasm_check_afir
void checkasm_check_afir(void)
Definition: af_afir.c:80
test_fcmul_add
static void test_fcmul_add(const float *src0, const float *src1, const float *src2)
Definition: af_afir.c:43
float_near_abs_eps
int float_near_abs_eps(float a, float b, float eps)
Definition: checkasm.c:328
check_func
#define check_func(func,...)
Definition: checkasm.h:125
AudioFIRDSPContext::fcmul_add
void(* fcmul_add)(float *sum, const float *t, const float *c, ptrdiff_t len)
Definition: af_afir.h:57
float.h
call_ref
#define call_ref(...)
Definition: checkasm.h:140
fail
#define fail()
Definition: checkasm.h:134
checkasm.h
call_new
#define call_new(...)
Definition: checkasm.h:212
fabs
static __device__ float fabs(float a)
Definition: cuda_runtime.h:182
ff_afir_init
void ff_afir_init(AudioFIRDSPContext *dsp)
Definition: af_afir.c:826
LOCAL_ALIGNED_32
#define LOCAL_ALIGNED_32(t, v,...)
Definition: mem_internal.h:136
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AudioFIRDSPContext
Definition: af_afir.h:56
LEN
#define LEN
Definition: af_afir.c:29
af_afir.h
src0
#define src0
Definition: h264pred.c:139
src1
#define src1
Definition: h264pred.c:140
report
#define report
Definition: checkasm.h:137
i
int i
Definition: input.c:407
bench_new
#define bench_new(...)
Definition: checkasm.h:272
internal.h
len
int len
Definition: vorbis_enc_data.h:426
randomize_buffer
#define randomize_buffer(buf)
Definition: af_afir.c:31
declare_func
#define declare_func(ret,...)
Definition: checkasm.h:129