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Code Issues Releases Activity

tiny_psnr: support 32-bit float samples

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Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard 2012-07-29 18:10:36 +01:00
parent f3eb008343
commit 9f1280def4
1 changed files with 49 additions and 5 deletions
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54
tests/tiny_psnr.c
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@ -24,6 +24,8 @@
#include <inttypes.h>
#include <assert.h>
#include "libavutil/intfloat.h"
#define FFMIN(a, b) ((a) > (b) ? (b) : (a))
#define F 100
#define SIZE 2048
@ -88,6 +90,23 @@ static uint64_t int_sqrt(uint64_t a)
return ret;
}
static int16_t get_s16l(uint8_t *p)
{
union {
uint16_t u;
int16_t s;
} v;
v.u = p[0] | p[1] << 8;
return v.s;
}
static float get_f32l(uint8_t *p)
{
union av_intfloat32 v;
v.i = p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
return v.f;
}
int main(int argc, char *argv[])
{
int i, j;
@ -96,8 +115,8 @@ int main(int argc, char *argv[])
FILE *f[2];
uint8_t buf[2][SIZE];
uint64_t psnr;
int len = argc < 4 ? 1 : atoi(argv[3]);
int64_t max = (1 << (8 * len)) - 1;
int len = 1;
int64_t max;
int shift = argc < 5 ? 0 : atoi(argv[4]);
int skip_bytes = argc < 6 ? 0 : atoi(argv[5]);
int size0 = 0;
@ -110,6 +129,25 @@ int main(int argc, char *argv[])
return 1;
}
if (argc > 3) {
if (!strcmp(argv[3], "u8")) {
len = 1;
} else if (!strcmp(argv[3], "s16")) {
len = 2;
} else if (!strcmp(argv[3], "f32")) {
len = 4;
} else {
char *end;
len = strtol(argv[3], &end, 0);
if (*end || len > 2) {
fprintf(stderr, "Unsupported sample format: %s\n", argv[3]);
return 1;
}
}
}
max = (1 << (8 * len)) - 1;
f[0] = fopen(argv[1], "rb");
f[1] = fopen(argv[2], "rb");
if (!f[0] || !f[1]) {
@ -145,13 +183,19 @@ int main(int argc, char *argv[])
int s0 = fread(buf[0], 1, SIZE, f[0]);
int s1 = fread(buf[1], 1, SIZE, f[1]);
for (j = 0; j < FFMIN(s0, s1); j++) {
for (j = 0; j < FFMIN(s0, s1); j += len) {
int64_t a = buf[0][j];
int64_t b = buf[1][j];
int dist;
if (len == 2) {
a = (int16_t)(a | (buf[0][++j] << 8));
b = (int16_t)(b | (buf[1][ j] << 8));
a = get_s16l(buf[0] + j);
b = get_s16l(buf[1] + j);
} else if (len == 4) {
a = get_f32l(buf[0] + j) * (1 << 24);
b = get_f32l(buf[1] + j) * (1 << 24);
} else {
a = buf[0][j];
b = buf[1][j];
}
sse += (a - b) * (a - b);
dist = abs(a - b);