| /* |
| * 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; |
| } |
