FFmpeg
synth_filter.c
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1 /*
2  * Copyright (c) 2015 Janne Grunau
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20 
21 #include <math.h>
22 #include <string.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 
26 #include "libavutil/internal.h"
27 #include "libavutil/intfloat.h"
28 #include "libavutil/mem_internal.h"
29 #include "libavutil/tx.h"
30 
31 #include "libavcodec/dcadata.h"
33 
34 #include "checkasm.h"
35 
36 #define BUF_SIZE 32
37 
38 #define randomize_input() \
39  do { \
40  int i; \
41  for (i = 0; i < BUF_SIZE; i++) { \
42  float f = (float)rnd() / (UINT_MAX >> 5) - 16.0f; \
43  in[i] = f; \
44  } \
45  } while (0)
46 
48 {
49  float scale = 1.0;
50  AVTXContext *imdct;
51  av_tx_fn imdct_fn;
52  SynthFilterContext synth;
53 
54  av_tx_init(&imdct, &imdct_fn, AV_TX_FLOAT_MDCT, 0, 16, &scale, 0);
55  ff_synth_filter_init(&synth);
56 
57  if (check_func(synth.synth_filter_float, "synth_filter_float")) {
58  LOCAL_ALIGNED(32, float, out0, [BUF_SIZE]);
59  LOCAL_ALIGNED(32, float, out1, [BUF_SIZE]);
60  LOCAL_ALIGNED(32, float, out_b, [BUF_SIZE]);
61  LOCAL_ALIGNED(32, float, in, [BUF_SIZE]);
62  LOCAL_ALIGNED(32, float, buf2_0, [BUF_SIZE]);
63  LOCAL_ALIGNED(32, float, buf2_1, [BUF_SIZE]);
64  LOCAL_ALIGNED(32, float, buf2_b, [BUF_SIZE]);
65  LOCAL_ALIGNED(32, float, buf0, [512]);
66  LOCAL_ALIGNED(32, float, buf1, [512]);
67  LOCAL_ALIGNED(32, float, buf_b, [512]);
68  float scale = 1.0f;
69  int i, offset0 = 0, offset1 = 0, offset_b = 0;
70 
71  declare_func(void, AVTXContext *, float *, int *,
72  float[32], const float[512], float[32], float[32], float, av_tx_fn);
73 
74  memset(buf2_0, 0, sizeof(*buf2_0) * BUF_SIZE);
75  memset(buf2_1, 0, sizeof(*buf2_1) * BUF_SIZE);
76  memset(buf2_b, 0, sizeof(*buf2_b) * BUF_SIZE);
77  memset(buf0, 0, sizeof(*buf2_0) * 512);
78  memset(buf1, 0, sizeof(*buf2_1) * 512);
79  memset(buf_b, 0, sizeof(*buf2_b) * 512);
80 
81  /* more than 1 synth_buf_offset wrap-around */
82  for (i = 0; i < 20; i++) {
83  int j;
85 
86  memset(out0, 0, sizeof(*out0) * BUF_SIZE);
87  memset(out1, 0, sizeof(*out1) * BUF_SIZE);
88  memset(out_b, 0, sizeof(*out_b) * BUF_SIZE);
89 
91 
92  call_ref(imdct, buf0, &offset0, buf2_0, window,
93  out0, in, scale, imdct_fn);
94  call_new(imdct, buf1, &offset1, buf2_1, window,
95  out1, in, scale, imdct_fn);
96 
97  if (offset0 != offset1) {
98  fail();
99  fprintf(stderr, "offsets do not match: %d, %d", offset0, offset1);
100  break;
101  }
102 
103  for (j = 0; j < BUF_SIZE; j++) {
104  if (!float_near_abs_eps_ulp(out0[j], out1[j], 7.0e-7, 16) ||
105  !float_near_abs_eps_ulp(buf2_0[j], buf2_1[j], 7.0e-7, 16)) {
106  union av_intfloat32 o0, o1, b0, b1;
107 
108  fail();
109  o0.f = out0[j]; o1.f = out1[j];
110  b0.f = buf2_0[j], b1.f = buf2_1[j];
111  fprintf(stderr, "out: %11g (0x%08x); %11g (0x%08x); abs diff %11g\n",
112  o0.f, o0.i, o1.f, o1.i, fabsf(o0.f - o1.f));
113  fprintf(stderr, "buf2: %11g (0x%08x); %11g (0x%08x); abs diff %11g\n",
114  b0.f, b0.i, b1.f, b1.i, fabsf(b0.f - b1.f));
115  break;
116  }
117  }
118 
119  bench_new(imdct, buf_b, &offset_b, buf2_b, window,
120  out_b, in, scale, imdct_fn);
121  }
122  }
123  av_tx_uninit(&imdct);
124 
125  report("synth_filter");
126 }
BUF_SIZE
#define BUF_SIZE
Definition: synth_filter.c:36
mem_internal.h
AVTXContext
Definition: tx_priv.h:228
synth_filter.h
av_intfloat32::i
uint32_t i
Definition: intfloat.h:28
check_func
#define check_func(func,...)
Definition: checkasm.h:125
call_ref
#define call_ref(...)
Definition: checkasm.h:140
intfloat.h
av_tx_init
av_cold int av_tx_init(AVTXContext **ctx, av_tx_fn *tx, enum AVTXType type, int inv, int len, const void *scale, uint64_t flags)
Initialize a transform context with the given configuration (i)MDCTs with an odd length are currently...
Definition: tx.c:883
ff_synth_filter_init
av_cold void ff_synth_filter_init(SynthFilterContext *c)
Definition: synth_filter.c:172
window
static SDL_Window * window
Definition: ffplay.c:365
randomize_input
#define randomize_input()
Definition: synth_filter.c:38
b1
static double b1(void *priv, double x, double y)
Definition: vf_xfade.c:1771
ff_dca_fir_32bands_nonperfect
const float ff_dca_fir_32bands_nonperfect[512]
Definition: dcadata.c:6808
SynthFilterContext
Definition: synth_filter.h:27
fail
#define fail()
Definition: checkasm.h:134
checkasm.h
float_near_abs_eps_ulp
int float_near_abs_eps_ulp(float a, float b, float eps, unsigned max_ulp)
Definition: checkasm.c:375
scale
static av_always_inline float scale(float x, float s)
Definition: vf_v360.c:1389
dcadata.h
fabsf
static __device__ float fabsf(float a)
Definition: cuda_runtime.h:181
checkasm_check_synth_filter
void checkasm_check_synth_filter(void)
Definition: synth_filter.c:47
av_tx_fn
void(* av_tx_fn)(AVTXContext *s, void *out, void *in, ptrdiff_t stride)
Function pointer to a function to perform the transform.
Definition: tx.h:127
LOCAL_ALIGNED
#define LOCAL_ALIGNED(a, t, v,...)
Definition: mem_internal.h:114
AV_TX_FLOAT_MDCT
@ AV_TX_FLOAT_MDCT
Standard MDCT with a sample data type of float, double or int32_t, respecively.
Definition: tx.h:68
call_new
#define call_new(...)
Definition: checkasm.h:222
av_intfloat32
Definition: intfloat.h:27
av_tx_uninit
av_cold void av_tx_uninit(AVTXContext **ctx)
Frees a context and sets *ctx to NULL, does nothing when *ctx == NULL.
Definition: tx.c:294
report
#define report
Definition: checkasm.h:137
bench_new
#define bench_new(...)
Definition: checkasm.h:287
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
internal.h
av_intfloat32::f
float f
Definition: intfloat.h:29
declare_func
#define declare_func(ret,...)
Definition: checkasm.h:129
ff_dca_fir_32bands_perfect
const float ff_dca_fir_32bands_perfect[512]
Definition: dcadata.c:6293
SynthFilterContext::synth_filter_float
void(* synth_filter_float)(AVTXContext *imdct, float *synth_buf_ptr, int *synth_buf_offset, float synth_buf2[32], const float window[512], float out[32], float in[32], float scale, av_tx_fn imdct_fn)
Definition: synth_filter.h:28
b0
static double b0(void *priv, double x, double y)
Definition: vf_xfade.c:1770
tx.h