| /* | |
| * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * FFmpeg 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 | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| #include <inttypes.h> | |
| #include <math.h> | |
| #include <float.h> | |
| #include <limits.h> | |
| #include "libavutil/intfloat.h" | |
| #include "libavutil/intreadwrite.h" | |
| #define FFMIN(a, b) ((a) > (b) ? (b) : (a)) | |
| #define F 100 | |
| #define SIZE 2048 | |
| uint64_t exp16_table[21] = { | |
| 65537, | |
| 65538, | |
| 65540, | |
| 65544, | |
| 65552, | |
| 65568, | |
| 65600, | |
| 65664, | |
| 65793, | |
| 66050, | |
| 66568, | |
| 67616, | |
| 69763, | |
| 74262, | |
| 84150, | |
| 108051, | |
| 178145, | |
| 484249, | |
| 3578144, | |
| 195360063, | |
| 582360139072LL, | |
| }; | |
| #if 0 | |
| // 16.16 fixpoint exp() | |
| static unsigned int exp16(unsigned int a){ | |
| int i; | |
| int out= 1<<16; | |
| for(i=19;i>=0;i--){ | |
| if(a&(1<<i)) | |
| out= (out*exp16_table[i] + (1<<15))>>16; | |
| } | |
| return out; | |
| } | |
| #endif | |
| // 16.16 fixpoint log() | |
| static int64_t log16(uint64_t a) | |
| { | |
| int i; | |
| int out = 0; | |
| if (a < 1 << 16) | |
| return -log16((1LL << 32) / a); | |
| a <<= 16; | |
| for (i = 20; i >= 0; i--) { | |
| int64_t b = exp16_table[i]; | |
| if (a < (b << 16)) | |
| continue; | |
| out |= 1 << i; | |
| a = ((a / b) << 16) + (((a % b) << 16) + b / 2) / b; | |
| } | |
| return out; | |
| } | |
| static uint64_t int_sqrt(uint64_t a) | |
| { | |
| uint64_t ret = 0; | |
| uint64_t ret_sq = 0; | |
| int s; | |
| for (s = 31; s >= 0; s--) { | |
| uint64_t b = ret_sq + (1ULL << (s * 2)) + (ret << s) * 2; | |
| if (b <= a) { | |
| ret_sq = b; | |
| ret += 1ULL << s; | |
| } | |
| } | |
| 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; | |
| } | |
| static double get_f64l(uint8_t *p) | |
| { | |
| return av_int2double(AV_RL64(p)); | |
| } | |
| static int run_psnr(FILE *f[2], int len, int shift, int skip_bytes) | |
| { | |
| uint64_t i, j; | |
| uint64_t sse = 0; | |
| double sse_d = 0.0; | |
| uint8_t buf[2][SIZE]; | |
| int64_t max = (1LL << (8 * len)) - 1; | |
| uint64_t size0 = 0; | |
| uint64_t size1 = 0; | |
| uint64_t maxdist = 0; | |
| double maxdist_d = 0.0; | |
| int noseek; | |
| noseek = fseek(f[0], 0, SEEK_SET) || | |
| fseek(f[1], 0, SEEK_SET); | |
| if (!noseek) { | |
| for (i = 0; i < 2; i++) { | |
| uint8_t *p = buf[i]; | |
| if (fread(p, 1, 12, f[i]) != 12) | |
| return -1; | |
| if (!memcmp(p, "RIFF", 4) && | |
| !memcmp(p + 8, "WAVE", 4)) { | |
| if (fread(p, 1, 8, f[i]) != 8) | |
| return -1; | |
| while (memcmp(p, "data", 4)) { | |
| int s = p[4] | p[5] << 8 | p[6] << 16 | p[7] << 24; | |
| fseek(f[i], s, SEEK_CUR); | |
| if (fread(p, 1, 8, f[i]) != 8) | |
| return -1; | |
| } | |
| } else { | |
| fseek(f[i], -12, SEEK_CUR); | |
| } | |
| } | |
| fseek(f[shift < 0], abs(shift), SEEK_CUR); | |
| fseek(f[0], skip_bytes, SEEK_CUR); | |
| fseek(f[1], skip_bytes, SEEK_CUR); | |
| } | |
| for (;;) { | |
| 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 += len) { | |
| switch (len) { | |
| case 1: | |
| case 2: { | |
| int64_t a, b; | |
| int dist; | |
| if (len == 2) { | |
| a = get_s16l(buf[0] + j); | |
| b = get_s16l(buf[1] + j); | |
| } else { | |
| a = buf[0][j]; | |
| b = buf[1][j]; | |
| } | |
| sse += (a - b) * (a - b); | |
| dist = llabs(a - b); | |
| if (dist > maxdist) | |
| maxdist = dist; | |
| break; | |
| } | |
| case 4: | |
| case 8: { | |
| double dist, a, b; | |
| if (len == 8) { | |
| a = get_f64l(buf[0] + j); | |
| b = get_f64l(buf[1] + j); | |
| } else { | |
| a = get_f32l(buf[0] + j); | |
| b = get_f32l(buf[1] + j); | |
| } | |
| dist = fabs(a - b); | |
| sse_d += (a - b) * (a - b); | |
| if (dist > maxdist_d) | |
| maxdist_d = dist; | |
| break; | |
| } | |
| } | |
| } | |
| size0 += s0; | |
| size1 += s1; | |
| if (s0 + s1 <= 0) | |
| break; | |
| } | |
| i = FFMIN(size0, size1) / len; | |
| if (!i) | |
| i = 1; | |
| switch (len) { | |
| case 1: | |
| case 2: { | |
| uint64_t psnr; | |
| uint64_t dev = int_sqrt(((sse / i) * F * F) + (((sse % i) * F * F) + i / 2) / i); | |
| if (sse) | |
| psnr = ((2 * log16(max << 16) + log16(i) - log16(sse)) * | |
| 284619LL * F + (1LL << 31)) / (1LL << 32); | |
| else | |
| psnr = 1000 * F - 1; // floating point free infinity :) | |
| printf("stddev:%5d.%02d PSNR:%3d.%02d MAXDIFF:%5"PRIu64" bytes:%9"PRIu64"/%9"PRIu64"\n", | |
| (int)(dev / F), (int)(dev % F), | |
| (int)(psnr / F), (int)(psnr % F), | |
| maxdist, size0, size1); | |
| return psnr; | |
| } | |
| case 4: | |
| case 8: { | |
| char psnr_str[64]; | |
| double psnr = INT_MAX; | |
| double dev = sqrt(sse_d / i); | |
| uint64_t scale = (len == 4) ? (1ULL << 24) : (1ULL << 32); | |
| if (sse_d) { | |
| psnr = 2 * log(DBL_MAX) - log(i / sse_d); | |
| snprintf(psnr_str, sizeof(psnr_str), "%5.02f", psnr); | |
| } else | |
| snprintf(psnr_str, sizeof(psnr_str), "inf"); | |
| maxdist = maxdist_d * scale; | |
| printf("stddev:%10.2f PSNR:%s MAXDIFF:%10"PRIu64" bytes:%9"PRIu64"/%9"PRIu64"\n", | |
| dev * scale, psnr_str, maxdist, size0, size1); | |
| return psnr; | |
| } | |
| } | |
| return -1; | |
| } | |
| int main(int argc, char *argv[]) | |
| { | |
| FILE *f[2]; | |
| int len = 1; | |
| int shift_first= argc < 5 ? 0 : atoi(argv[4]); | |
| int skip_bytes = argc < 6 ? 0 : atoi(argv[5]); | |
| int shift_last = shift_first + (argc < 7 ? 0 : atoi(argv[6])); | |
| int shift; | |
| int max_psnr = -1; | |
| int max_psnr_shift = 0; | |
| if (shift_last > shift_first) | |
| shift_first -= shift_last - shift_first; | |
| 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 if (!strcmp(argv[3], "f64")) { | |
| len = 8; | |
| } else { | |
| char *end; | |
| len = strtol(argv[3], &end, 0); | |
| if (*end || len < 1 || len > 2) { | |
| fprintf(stderr, "Unsupported sample format: %s\nSupported: u8, s16, f32, f64\n", argv[3]); | |
| return 1; | |
| } | |
| } | |
| } | |
| if (argc < 3) { | |
| printf("tiny_psnr <file1> <file2> [<elem size>|u8|s16|f32|f64 [<shift> [<skip bytes> [<shift search range>]]]]\n"); | |
| printf("WAV headers are skipped automatically.\n"); | |
| return 1; | |
| } | |
| f[0] = fopen(argv[1], "rb"); | |
| f[1] = fopen(argv[2], "rb"); | |
| if (!f[0] || !f[1]) { | |
| fprintf(stderr, "Could not open input files.\n"); | |
| return 1; | |
| } | |
| for (shift = shift_first; shift <= shift_last; shift++) { | |
| int psnr = run_psnr(f, len, shift, skip_bytes); | |
| if (psnr > max_psnr || (shift < 0 && psnr == max_psnr)) { | |
| max_psnr = psnr; | |
| max_psnr_shift = shift; | |
| } | |
| } | |
| if (max_psnr < 0) | |
| return 2; | |
| if (shift_last > shift_first) | |
| printf("Best PSNR is %3d.%02d for shift %i\n", (int)(max_psnr / F), (int)(max_psnr % F), max_psnr_shift); | |
| return 0; | |
| } |