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ffmpeg/libswresample/swresample-test.c
Ganesh Ajjanagadde 8507b98c10 avfilter,swresample,swscale: use fabs, fabsf instead of FFABS 
It is well known that fabs and fabsf are at least as fast and sometimes
faster than the FFABS macro, at least on the gcc+glibc combination.
For instance, see the reference:
http://patchwork.sourceware.org/patch/6735/.
This was a patch to glibc in order to remove their usages of a macro.

The reason essentially boils down to fabs using the __builtin_fabs of
the compiler, while FFABS needs to infer to not use a branch and to
simply change the sign bit. Usually the inference works, but sometimes
it does not. This may be easily checked by looking at the asm.

This also has the added benefit of reducing macro usage, which has
problems with side-effects.

Note that avcodec is not handled here, as it is huge and
most things there are integer arithmetic anyway.

Tested with FATE.

Reviewed-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
2015-10-22 16:13:26 -04:00

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/*
* Copyright (C) 2011-2012 Michael Niedermayer (michaelni@gmx.at)
* Copyright (c) 2002 Fabrice Bellard
*
* This file is part of libswresample
*
* libswresample 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.
*
* libswresample 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 libswresample; 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/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "swresample.h"
#undef time
#include "time.h"
#undef fprintf
#define SAMPLES 1000
#define SWR_CH_MAX 32
#define ASSERT_LEVEL 2
static double get(uint8_t *a[], int ch, int index, int ch_count, enum AVSampleFormat f){
const uint8_t *p;
if(av_sample_fmt_is_planar(f)){
f= av_get_alt_sample_fmt(f, 0);
p= a[ch];
}else{
p= a[0];
index= ch + index*ch_count;
}
switch(f){
case AV_SAMPLE_FMT_U8 : return ((const uint8_t*)p)[index]/127.0-1.0;
case AV_SAMPLE_FMT_S16: return ((const int16_t*)p)[index]/32767.0;
case AV_SAMPLE_FMT_S32: return ((const int32_t*)p)[index]/2147483647.0;
case AV_SAMPLE_FMT_FLT: return ((const float *)p)[index];
case AV_SAMPLE_FMT_DBL: return ((const double *)p)[index];
default: av_assert0(0);
}
}
static void set(uint8_t *a[], int ch, int index, int ch_count, enum AVSampleFormat f, double v){
uint8_t *p;
if(av_sample_fmt_is_planar(f)){
f= av_get_alt_sample_fmt(f, 0);
p= a[ch];
}else{
p= a[0];
index= ch + index*ch_count;
}
switch(f){
case AV_SAMPLE_FMT_U8 : ((uint8_t*)p)[index]= av_clip_uint8 (lrint((v+1.0)*127)); break;
case AV_SAMPLE_FMT_S16: ((int16_t*)p)[index]= av_clip_int16 (lrint(v*32767)); break;
case AV_SAMPLE_FMT_S32: ((int32_t*)p)[index]= av_clipl_int32(llrint(v*2147483647)); break;
case AV_SAMPLE_FMT_FLT: ((float *)p)[index]= v; break;
case AV_SAMPLE_FMT_DBL: ((double *)p)[index]= v; break;
default: av_assert2(0);
}
}
static void shift(uint8_t *a[], int index, int ch_count, enum AVSampleFormat f){
int ch;
if(av_sample_fmt_is_planar(f)){
f= av_get_alt_sample_fmt(f, 0);
for(ch= 0; ch<ch_count; ch++)
a[ch] += index*av_get_bytes_per_sample(f);
}else{
a[0] += index*ch_count*av_get_bytes_per_sample(f);
}
}
static const enum AVSampleFormat formats[] = {
AV_SAMPLE_FMT_S16,
AV_SAMPLE_FMT_FLTP,
AV_SAMPLE_FMT_S16P,
AV_SAMPLE_FMT_FLT,
AV_SAMPLE_FMT_S32P,
AV_SAMPLE_FMT_S32,
AV_SAMPLE_FMT_U8P,
AV_SAMPLE_FMT_U8,
AV_SAMPLE_FMT_DBLP,
AV_SAMPLE_FMT_DBL,
};
static const int rates[] = {
8000,
11025,
16000,
22050,
32000,
48000,
};
static const uint64_t layouts[]={
AV_CH_LAYOUT_MONO ,
AV_CH_LAYOUT_STEREO ,
AV_CH_LAYOUT_2_1 ,
AV_CH_LAYOUT_SURROUND ,
AV_CH_LAYOUT_4POINT0 ,
AV_CH_LAYOUT_2_2 ,
AV_CH_LAYOUT_QUAD ,
AV_CH_LAYOUT_5POINT0 ,
AV_CH_LAYOUT_5POINT1 ,
AV_CH_LAYOUT_5POINT0_BACK ,
AV_CH_LAYOUT_5POINT1_BACK ,
AV_CH_LAYOUT_7POINT0 ,
AV_CH_LAYOUT_7POINT1 ,
AV_CH_LAYOUT_7POINT1_WIDE ,
};
static void setup_array(uint8_t *out[SWR_CH_MAX], uint8_t *in, enum AVSampleFormat format, int samples){
if(av_sample_fmt_is_planar(format)){
int i;
int plane_size= av_get_bytes_per_sample(format&0xFF)*samples;
format&=0xFF;
for(i=0; i<SWR_CH_MAX; i++){
out[i]= in + i*plane_size;
}
}else{
out[0]= in;
}
}
static int cmp(const int *a, const int *b){
return *a - *b;
}
static void audiogen(void *data, enum AVSampleFormat sample_fmt,
int channels, int sample_rate, int nb_samples)
{
int i, ch, k;
double v, f, a, ampa;
double tabf1[SWR_CH_MAX];
double tabf2[SWR_CH_MAX];
double taba[SWR_CH_MAX];
unsigned static rnd;
#define PUT_SAMPLE set(data, ch, k, channels, sample_fmt, v);
#define uint_rand(x) ((x) = (x) * 1664525 + 1013904223)
#define dbl_rand(x) (uint_rand(x)*2.0 / (double)UINT_MAX - 1)
k = 0;
/* 1 second of single freq sinus at 1000 Hz */
a = 0;
for (i = 0; i < 1 * sample_rate && k < nb_samples; i++, k++) {
v = sin(a) * 0.30;
for (ch = 0; ch < channels; ch++)
PUT_SAMPLE
a += M_PI * 1000.0 * 2.0 / sample_rate;
}
/* 1 second of varying frequency between 100 and 10000 Hz */
a = 0;
for (i = 0; i < 1 * sample_rate && k < nb_samples; i++, k++) {
v = sin(a) * 0.30;
for (ch = 0; ch < channels; ch++)
PUT_SAMPLE
f = 100.0 + (((10000.0 - 100.0) * i) / sample_rate);
a += M_PI * f * 2.0 / sample_rate;
}
/* 0.5 second of low amplitude white noise */
for (i = 0; i < sample_rate / 2 && k < nb_samples; i++, k++) {
v = dbl_rand(rnd) * 0.30;
for (ch = 0; ch < channels; ch++)
PUT_SAMPLE
}
/* 0.5 second of high amplitude white noise */
for (i = 0; i < sample_rate / 2 && k < nb_samples; i++, k++) {
v = dbl_rand(rnd);
for (ch = 0; ch < channels; ch++)
PUT_SAMPLE
}
/* 1 second of unrelated ramps for each channel */
for (ch = 0; ch < channels; ch++) {
taba[ch] = 0;
tabf1[ch] = 100 + uint_rand(rnd) % 5000;
tabf2[ch] = 100 + uint_rand(rnd) % 5000;
}
for (i = 0; i < 1 * sample_rate && k < nb_samples; i++, k++) {
for (ch = 0; ch < channels; ch++) {
v = sin(taba[ch]) * 0.30;
PUT_SAMPLE
f = tabf1[ch] + (((tabf2[ch] - tabf1[ch]) * i) / sample_rate);
taba[ch] += M_PI * f * 2.0 / sample_rate;
}
}
/* 2 seconds of 500 Hz with varying volume */
a = 0;
ampa = 0;
for (i = 0; i < 2 * sample_rate && k < nb_samples; i++, k++) {
for (ch = 0; ch < channels; ch++) {
double amp = (1.0 + sin(ampa)) * 0.15;
if (ch & 1)
amp = 0.30 - amp;
v = sin(a) * amp;
PUT_SAMPLE
a += M_PI * 500.0 * 2.0 / sample_rate;
ampa += M_PI * 2.0 / sample_rate;
}
}
}
int main(int argc, char **argv){
int in_sample_rate, out_sample_rate, ch ,i, flush_count;
uint64_t in_ch_layout, out_ch_layout;
enum AVSampleFormat in_sample_fmt, out_sample_fmt;
uint8_t array_in[SAMPLES*8*8];
uint8_t array_mid[SAMPLES*8*8*3];
uint8_t array_out[SAMPLES*8*8+100];
uint8_t *ain[SWR_CH_MAX];
uint8_t *aout[SWR_CH_MAX];
uint8_t *amid[SWR_CH_MAX];
int flush_i=0;
int mode;
int num_tests = 10000;
uint32_t seed = 0;
uint32_t rand_seed = 0;
int remaining_tests[FF_ARRAY_ELEMS(rates) * FF_ARRAY_ELEMS(layouts) * FF_ARRAY_ELEMS(formats) * FF_ARRAY_ELEMS(layouts) * FF_ARRAY_ELEMS(formats)];
int max_tests = FF_ARRAY_ELEMS(remaining_tests);
int test;
int specific_test= -1;
struct SwrContext * forw_ctx= NULL;
struct SwrContext *backw_ctx= NULL;
if (argc > 1) {
if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
av_log(NULL, AV_LOG_INFO, "Usage: swresample-test [<num_tests>[ <test>]] \n"
"num_tests Default is %d\n", num_tests);
return 0;
}
num_tests = strtol(argv[1], NULL, 0);
if(num_tests < 0) {
num_tests = -num_tests;
rand_seed = time(0);
}
if(num_tests<= 0 || num_tests>max_tests)
num_tests = max_tests;
if(argc > 2) {
specific_test = strtol(argv[1], NULL, 0);
}
}
for(i=0; i<max_tests; i++)
remaining_tests[i] = i;
for(test=0; test<num_tests; test++){
unsigned r;
uint_rand(seed);
r = (seed * (uint64_t)(max_tests - test)) >>32;
FFSWAP(int, remaining_tests[r], remaining_tests[max_tests - test - 1]);
}
qsort(remaining_tests + max_tests - num_tests, num_tests, sizeof(remaining_tests[0]), (void*)cmp);
in_sample_rate=16000;
for(test=0; test<num_tests; test++){
char in_layout_string[256];
char out_layout_string[256];
unsigned vector= remaining_tests[max_tests - test - 1];
int in_ch_count;
int out_count, mid_count, out_ch_count;
in_ch_layout = layouts[vector % FF_ARRAY_ELEMS(layouts)]; vector /= FF_ARRAY_ELEMS(layouts);
out_ch_layout = layouts[vector % FF_ARRAY_ELEMS(layouts)]; vector /= FF_ARRAY_ELEMS(layouts);
in_sample_fmt = formats[vector % FF_ARRAY_ELEMS(formats)]; vector /= FF_ARRAY_ELEMS(formats);
out_sample_fmt = formats[vector % FF_ARRAY_ELEMS(formats)]; vector /= FF_ARRAY_ELEMS(formats);
out_sample_rate = rates [vector % FF_ARRAY_ELEMS(rates )]; vector /= FF_ARRAY_ELEMS(rates);
av_assert0(!vector);
if(specific_test == 0){
if(out_sample_rate != in_sample_rate || in_ch_layout != out_ch_layout)
continue;
}
in_ch_count= av_get_channel_layout_nb_channels(in_ch_layout);
out_ch_count= av_get_channel_layout_nb_channels(out_ch_layout);
av_get_channel_layout_string( in_layout_string, sizeof( in_layout_string), in_ch_count, in_ch_layout);
av_get_channel_layout_string(out_layout_string, sizeof(out_layout_string), out_ch_count, out_ch_layout);
fprintf(stderr, "TEST: %s->%s, rate:%5d->%5d, fmt:%s->%s\n",
in_layout_string, out_layout_string,
in_sample_rate, out_sample_rate,
av_get_sample_fmt_name(in_sample_fmt), av_get_sample_fmt_name(out_sample_fmt));
forw_ctx = swr_alloc_set_opts(forw_ctx, out_ch_layout, out_sample_fmt, out_sample_rate,
in_ch_layout, in_sample_fmt, in_sample_rate,
0, 0);
backw_ctx = swr_alloc_set_opts(backw_ctx, in_ch_layout, in_sample_fmt, in_sample_rate,
out_ch_layout, out_sample_fmt, out_sample_rate,
0, 0);
if(!forw_ctx) {
fprintf(stderr, "Failed to init forw_cts\n");
return 1;
}
if(!backw_ctx) {
fprintf(stderr, "Failed to init backw_ctx\n");
return 1;
}
if (uint_rand(rand_seed) % 3 == 0)
av_opt_set_int(forw_ctx, "ich", 0, 0);
if (uint_rand(rand_seed) % 3 == 0)
av_opt_set_int(forw_ctx, "och", 0, 0);
if(swr_init( forw_ctx) < 0)
fprintf(stderr, "swr_init(->) failed\n");
if(swr_init(backw_ctx) < 0)
fprintf(stderr, "swr_init(<-) failed\n");
//FIXME test planar
setup_array(ain , array_in , in_sample_fmt, SAMPLES);
setup_array(amid, array_mid, out_sample_fmt, 3*SAMPLES);
setup_array(aout, array_out, in_sample_fmt , SAMPLES);
#if 0
for(ch=0; ch<in_ch_count; ch++){
for(i=0; i<SAMPLES; i++)
set(ain, ch, i, in_ch_count, in_sample_fmt, sin(i*i*3/SAMPLES));
}
#else
audiogen(ain, in_sample_fmt, in_ch_count, SAMPLES/6+1, SAMPLES);
#endif
mode = uint_rand(rand_seed) % 3;
if(mode==0 /*|| out_sample_rate == in_sample_rate*/) {
mid_count= swr_convert(forw_ctx, amid, 3*SAMPLES, (const uint8_t **)ain, SAMPLES);
} else if(mode==1){
mid_count= swr_convert(forw_ctx, amid, 0, (const uint8_t **)ain, SAMPLES);
mid_count+=swr_convert(forw_ctx, amid, 3*SAMPLES, (const uint8_t **)ain, 0);
} else {
int tmp_count;
mid_count= swr_convert(forw_ctx, amid, 0, (const uint8_t **)ain, 1);
av_assert0(mid_count==0);
shift(ain, 1, in_ch_count, in_sample_fmt);
mid_count+=swr_convert(forw_ctx, amid, 3*SAMPLES, (const uint8_t **)ain, 0);
shift(amid, mid_count, out_ch_count, out_sample_fmt); tmp_count = mid_count;
mid_count+=swr_convert(forw_ctx, amid, 2, (const uint8_t **)ain, 2);
shift(amid, mid_count-tmp_count, out_ch_count, out_sample_fmt); tmp_count = mid_count;
shift(ain, 2, in_ch_count, in_sample_fmt);
mid_count+=swr_convert(forw_ctx, amid, 1, (const uint8_t **)ain, SAMPLES-3);
shift(amid, mid_count-tmp_count, out_ch_count, out_sample_fmt); tmp_count = mid_count;
shift(ain, -3, in_ch_count, in_sample_fmt);
mid_count+=swr_convert(forw_ctx, amid, 3*SAMPLES, (const uint8_t **)ain, 0);
shift(amid, -tmp_count, out_ch_count, out_sample_fmt);
}
out_count= swr_convert(backw_ctx,aout, SAMPLES, (const uint8_t **)amid, mid_count);
for(ch=0; ch<in_ch_count; ch++){
double sse, maxdiff=0;
double sum_a= 0;
double sum_b= 0;
double sum_aa= 0;
double sum_bb= 0;
double sum_ab= 0;
for(i=0; i<out_count; i++){
double a= get(ain , ch, i, in_ch_count, in_sample_fmt);
double b= get(aout, ch, i, in_ch_count, in_sample_fmt);
sum_a += a;
sum_b += b;
sum_aa+= a*a;
sum_bb+= b*b;
sum_ab+= a*b;
maxdiff= FFMAX(maxdiff, fabs(a-b));
}
sse= sum_aa + sum_bb - 2*sum_ab;
if(sse < 0 && sse > -0.00001) sse=0; //fix rounding error
fprintf(stderr, "[e:%f c:%f max:%f] len:%5d\n", out_count ? sqrt(sse/out_count) : 0, sum_ab/(sqrt(sum_aa*sum_bb)), maxdiff, out_count);
}
flush_i++;
flush_i%=21;
flush_count = swr_convert(backw_ctx,aout, flush_i, 0, 0);
shift(aout, flush_i, in_ch_count, in_sample_fmt);
flush_count+= swr_convert(backw_ctx,aout, SAMPLES-flush_i, 0, 0);
shift(aout, -flush_i, in_ch_count, in_sample_fmt);
if(flush_count){
for(ch=0; ch<in_ch_count; ch++){
double sse, maxdiff=0;
double sum_a= 0;
double sum_b= 0;
double sum_aa= 0;
double sum_bb= 0;
double sum_ab= 0;
for(i=0; i<flush_count; i++){
double a= get(ain , ch, i+out_count, in_ch_count, in_sample_fmt);
double b= get(aout, ch, i, in_ch_count, in_sample_fmt);
sum_a += a;
sum_b += b;
sum_aa+= a*a;
sum_bb+= b*b;
sum_ab+= a*b;
maxdiff= FFMAX(maxdiff, fabs(a-b));
}
sse= sum_aa + sum_bb - 2*sum_ab;
if(sse < 0 && sse > -0.00001) sse=0; //fix rounding error
fprintf(stderr, "[e:%f c:%f max:%f] len:%5d F:%3d\n", sqrt(sse/flush_count), sum_ab/(sqrt(sum_aa*sum_bb)), maxdiff, flush_count, flush_i);
}
}
fprintf(stderr, "\n");
}
return 0;
}
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