31 #define FFMIN(a, b) ((a) > (b) ? (b) : (a)) 66 return -
log16((1LL << 32) / a);
69 for (i = 20; i >= 0; i--) {
74 a = ((a /
b) << 16) + (((a %
b) << 16) + b / 2) / b;
85 for (s = 31; s >= 0; s--) {
86 uint64_t
b = ret_sq + (1ULL << (s * 2)) + (ret << s) * 2;
101 v.u = p[0] | p[1] << 8;
108 v.
i = p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
117 int main(
int argc,
char *argv[])
126 int shift = argc < 5 ? 0 : atoi(argv[4]);
127 int skip_bytes = argc < 6 ? 0 : atoi(argv[5]);
130 uint64_t maxdist = 0;
131 double maxdist_d = 0.0;
134 printf(
"tiny_psnr <file1> <file2> [<elem size> [<shift> [<skip bytes>]]]\n");
135 printf(
"WAV headers are skipped automatically.\n");
140 if (!strcmp(argv[3],
"u8")) {
142 }
else if (!strcmp(argv[3],
"s16")) {
144 }
else if (!strcmp(argv[3],
"f32")) {
146 }
else if (!strcmp(argv[3],
"f64")) {
150 len = strtol(argv[3], &end, 0);
151 if (*end || len < 1 || len > 2) {
152 fprintf(stderr,
"Unsupported sample format: %s\n", argv[3]);
158 max = (1LL << (8 *
len)) - 1;
160 f[0] = fopen(argv[1],
"rb");
161 f[1] = fopen(argv[2],
"rb");
162 if (!f[0] || !f[1]) {
163 fprintf(stderr,
"Could not open input files.\n");
167 for (i = 0; i < 2; i++) {
169 if (fread(p, 1, 12, f[i]) != 12)
171 if (!memcmp(p,
"RIFF", 4) &&
172 !memcmp(p + 8,
"WAVE", 4)) {
173 if (fread(p, 1, 8, f[i]) != 8)
175 while (memcmp(p,
"data", 4)) {
176 int s = p[4] | p[5] << 8 | p[6] << 16 | p[7] << 24;
177 fseek(f[i], s, SEEK_CUR);
178 if (fread(p, 1, 8, f[i]) != 8)
182 fseek(f[i], -12, SEEK_CUR);
186 fseek(f[shift < 0], abs(shift), SEEK_CUR);
188 fseek(f[0], skip_bytes, SEEK_CUR);
189 fseek(f[1], skip_bytes, SEEK_CUR);
192 int s0 = fread(buf[0], 1,
SIZE, f[0]);
193 int s1 = fread(buf[1], 1,
SIZE, f[1]);
195 for (j = 0; j <
FFMIN(s0, s1); j +=
len) {
199 int64_t
a = buf[0][j];
200 int64_t
b = buf[1][j];
209 sse += (a -
b) * (a - b);
226 sse_d += (a -
b) * (a - b);
227 if (dist > maxdist_d)
246 uint64_t dev =
int_sqrt(((sse / i) *
F *
F) + (((sse % i) * F * F) + i / 2) / i);
249 284619LL * F + (1LL << 31)) / (1LL << 32);
253 printf(
"stddev:%5d.%02d PSNR:%3d.%02d MAXDIFF:%5"PRIu64
" bytes:%9"PRIu64
"/%9"PRIu64
"\n",
254 (
int)(dev / F), (
int)(dev % F),
255 (
int)(psnr / F), (
int)(psnr % F),
256 maxdist, size0, size1);
262 double dev = sqrt(sse_d / i);
263 uint64_t scale = (len == 4) ? (1ULL << 24) : (1ULL << 32);
266 double psnr = 2 * log(DBL_MAX) - log(i / sse_d);
267 snprintf(psnr_str,
sizeof(psnr_str),
"%5.02f", psnr);
269 snprintf(psnr_str,
sizeof(psnr_str),
"inf");
271 maxdist = maxdist_d * scale;
273 printf(
"stddev:%10.2f PSNR:%s MAXDIFF:%10"PRIu64
" bytes:%9"PRIu64
"/%9"PRIu64
"\n",
274 dev * scale, psnr_str, maxdist, size0, size1);
static int64_t log16(uint64_t a)
static int sse(MpegEncContext *s, uint8_t *src1, uint8_t *src2, int w, int h, int stride)
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
static av_unused const uint8_t * skip_bytes(CABACContext *c, int n)
Skip n bytes and reset the decoder.
int main(int argc, char *argv[])
static uint64_t int_sqrt(uint64_t a)
static float get_f32l(uint8_t *p)
static double psnr(double d)
static int16_t get_s16l(uint8_t *p)
static double get_f64l(uint8_t *p)