32 #define FFMIN(a, b) ((a) > (b) ? (b) : (a))
61 static int64_t
log16(uint64_t a)
67 return -
log16((1LL << 32) / a);
70 for (i = 20; i >= 0; i--) {
75 a = ((a /
b) << 16) + (((a %
b) << 16) + b / 2) / b;
86 for (s = 31; s >= 0; s--) {
87 uint64_t
b = ret_sq + (1ULL << (s * 2)) + (ret << s) * 2;
102 v.u = p[0] | p[1] << 8;
109 v.
i = p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
118 int main(
int argc,
char *argv[])
127 int shift = argc < 5 ? 0 : atoi(argv[4]);
128 int skip_bytes = argc < 6 ? 0 : atoi(argv[5]);
131 uint64_t maxdist = 0;
132 double maxdist_d = 0.0;
135 printf(
"tiny_psnr <file1> <file2> [<elem size> [<shift> [<skip bytes>]]]\n");
136 printf(
"WAV headers are skipped automatically.\n");
141 if (!strcmp(argv[3],
"u8")) {
143 }
else if (!strcmp(argv[3],
"s16")) {
145 }
else if (!strcmp(argv[3],
"f32")) {
147 }
else if (!strcmp(argv[3],
"f64")) {
151 len = strtol(argv[3], &end, 0);
152 if (*end || len < 1 || len > 2) {
153 fprintf(stderr,
"Unsupported sample format: %s\n", argv[3]);
159 max = (1LL << (8 *
len)) - 1;
161 f[0] = fopen(argv[1],
"rb");
162 f[1] = fopen(argv[2],
"rb");
163 if (!f[0] || !f[1]) {
164 fprintf(stderr,
"Could not open input files.\n");
168 for (i = 0; i < 2; i++) {
170 if (fread(p, 1, 12, f[i]) != 12)
172 if (!memcmp(p,
"RIFF", 4) &&
173 !memcmp(p + 8,
"WAVE", 4)) {
174 if (fread(p, 1, 8, f[i]) != 8)
176 while (memcmp(p,
"data", 4)) {
177 int s = p[4] | p[5] << 8 | p[6] << 16 | p[7] << 24;
178 fseek(f[i], s, SEEK_CUR);
179 if (fread(p, 1, 8, f[i]) != 8)
183 fseek(f[i], -12, SEEK_CUR);
187 fseek(f[shift < 0], abs(shift), SEEK_CUR);
189 fseek(f[0], skip_bytes, SEEK_CUR);
190 fseek(f[1], skip_bytes, SEEK_CUR);
193 int s0 = fread(buf[0], 1,
SIZE, f[0]);
194 int s1 = fread(buf[1], 1,
SIZE, f[1]);
196 for (j = 0; j <
FFMIN(s0, s1); j +=
len) {
200 int64_t a = buf[0][j];
201 int64_t
b = buf[1][j];
210 sse += (a -
b) * (a - b);
227 sse_d += (a -
b) * (a - b);
228 if (dist > maxdist_d)
247 uint64_t dev =
int_sqrt(((sse / i) *
F *
F) + (((sse % i) * F * F) + i / 2) / i);
250 284619LL * F + (1LL << 31)) / (1LL << 32);
254 printf(
"stddev:%5d.%02d PSNR:%3d.%02d MAXDIFF:%5"PRIu64
" bytes:%9d/%9d\n",
255 (
int)(dev / F), (
int)(dev % F),
256 (
int)(psnr / F), (
int)(psnr % F),
257 maxdist, size0, size1);
263 double dev = sqrt(sse_d / i);
264 uint64_t
scale = (len == 4) ? (1ULL << 24) : (1ULL << 32);
267 double psnr = 2 * log(DBL_MAX) - log(i / sse_d);
268 snprintf(psnr_str,
sizeof(psnr_str),
"%5.02f", psnr);
270 snprintf(psnr_str,
sizeof(psnr_str),
"inf");
272 maxdist = maxdist_d *
scale;
274 printf(
"stddev:%10.2f PSNR:%s MAXDIFF:%10"PRIu64
" bytes:%9d/%9d\n",
275 dev * scale, psnr_str, maxdist, size0, size1);