32 #define FFMIN(a, b) ((a) > (b) ? (b) : (a))
62 static unsigned int exp16(
unsigned int a){
76 static int64_t
log16(uint64_t a)
82 return -
log16((1LL << 32) / a);
85 for (i = 20; i >= 0; i--) {
90 a = ((a /
b) << 16) + (((a %
b) << 16) + b / 2) / b;
101 for (s = 31; s >= 0; s--) {
102 uint64_t
b = ret_sq + (1ULL << (s * 2)) + (ret <<
s) * 2;
117 v.u = p[0] | p[1] << 8;
124 v.
i = p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
139 int64_t max = (1LL << (8 *
len)) - 1;
142 uint64_t maxdist = 0;
143 double maxdist_d = 0.0;
146 noseek = fseek(f[0], 0, SEEK_SET) ||
147 fseek(f[1], 0, SEEK_SET);
150 for (i = 0; i < 2; i++) {
152 if (fread(p, 1, 12, f[i]) != 12)
154 if (!memcmp(p,
"RIFF", 4) &&
155 !memcmp(p + 8,
"WAVE", 4)) {
156 if (fread(p, 1, 8, f[i]) != 8)
158 while (memcmp(p,
"data", 4)) {
159 int s = p[4] | p[5] << 8 | p[6] << 16 | p[7] << 24;
160 fseek(f[i], s, SEEK_CUR);
161 if (fread(p, 1, 8, f[i]) != 8)
165 fseek(f[i], -12, SEEK_CUR);
169 fseek(f[shift < 0], abs(shift), SEEK_CUR);
171 fseek(f[0], skip_bytes, SEEK_CUR);
172 fseek(f[1], skip_bytes, SEEK_CUR);
176 int s0 = fread(buf[0], 1,
SIZE, f[0]);
177 int s1 = fread(buf[1], 1,
SIZE, f[1]);
179 for (j = 0; j <
FFMIN(s0, s1); j +=
len) {
192 sse += (a -
b) * (a - b);
209 sse_d += (a -
b) * (a - b);
210 if (dist > maxdist_d)
229 uint64_t dev =
int_sqrt(((sse / i) *
F *
F) + (((sse % i) * F * F) + i / 2) / i);
232 284619LL * F + (1LL << 31)) / (1LL << 32);
236 printf(
"stddev:%5d.%02d PSNR:%3d.%02d MAXDIFF:%5"PRIu64
" bytes:%9d/%9d\n",
237 (
int)(dev / F), (
int)(dev % F),
238 (
int)(psnr / F), (
int)(psnr % F),
239 maxdist, size0, size1);
245 double psnr = INT_MAX;
246 double dev = sqrt(sse_d / i);
247 uint64_t scale = (len == 4) ? (1ULL << 24) : (1ULL << 32);
250 psnr = 2 * log(DBL_MAX) - log(i / sse_d);
251 snprintf(psnr_str,
sizeof(psnr_str),
"%5.02f", psnr);
253 snprintf(psnr_str,
sizeof(psnr_str),
"inf");
255 maxdist = maxdist_d * scale;
257 printf(
"stddev:%10.2f PSNR:%s MAXDIFF:%10"PRIu64
" bytes:%9d/%9d\n",
258 dev * scale, psnr_str, maxdist, size0, size1);
265 int main(
int argc,
char *argv[])
269 int shift_first= argc < 5 ? 0 : atoi(argv[4]);
270 int skip_bytes = argc < 6 ? 0 : atoi(argv[5]);
271 int shift_last = shift_first + (argc < 7 ? 0 : atoi(argv[6]));
274 int max_psnr_shift = 0;
276 if (shift_last > shift_first)
277 shift_first -= shift_last - shift_first;
280 if (!strcmp(argv[3],
"u8")) {
282 }
else if (!strcmp(argv[3],
"s16")) {
284 }
else if (!strcmp(argv[3],
"f32")) {
286 }
else if (!strcmp(argv[3],
"f64")) {
290 len = strtol(argv[3], &end, 0);
291 if (*end || len < 1 || len > 2) {
292 fprintf(stderr,
"Unsupported sample format: %s\nSupported: u8, s16, f32, f64\n", argv[3]);
299 printf(
"tiny_psnr <file1> <file2> [<elem size>|u8|s16|f32|f64 [<shift> [<skip bytes> [<shift search range>]]]]\n");
300 printf(
"WAV headers are skipped automatically.\n");
304 f[0] = fopen(argv[1],
"rb");
305 f[1] = fopen(argv[2],
"rb");
306 if (!f[0] || !f[1]) {
307 fprintf(stderr,
"Could not open input files.\n");
311 for (shift = shift_first; shift <= shift_last; shift++) {
313 if (psnr > max_psnr || (shift < 0 && psnr == max_psnr)) {
315 max_psnr_shift =
shift;
321 if (shift_last > shift_first)
322 printf(
"Best PSNR is %3d.%02d for shift %i\n", (
int)(max_psnr /
F), (
int)(max_psnr %
F), max_psnr_shift);
static int shift(int a, int b)
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_cold int end(AVCodecContext *avctx)
static double psnr(double d)
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 int16_t get_s16l(uint8_t *p)
static int run_psnr(FILE *f[2], int len, int shift, int skip_bytes)
static double get_f64l(uint8_t *p)