diff options
Diffstat (limited to 'tests/tiny_psnr.c')
| -rw-r--r-- | tests/tiny_psnr.c | 114 |
1 files changed, 77 insertions, 37 deletions
diff --git a/tests/tiny_psnr.c b/tests/tiny_psnr.c index 1583f2c..4f307b0 100644 --- a/tests/tiny_psnr.c +++ b/tests/tiny_psnr.c @@ -1,20 +1,20 @@ /* * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -52,6 +52,21 @@ uint64_t exp16_table[21] = { 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) { @@ -88,58 +103,47 @@ static uint64_t int_sqrt(uint64_t a) return ret; } -int main(int argc, char *argv[]) +static int run_psnr(FILE *f[2], int len, int shift, int skip_bytes) { int i, j; uint64_t sse = 0; uint64_t dev; - FILE *f[2]; uint8_t buf[2][SIZE]; uint64_t psnr; - int len = argc < 4 ? 1 : atoi(argv[3]); int64_t max = (1 << (8 * len)) - 1; - int shift = argc < 5 ? 0 : atoi(argv[4]); - int skip_bytes = argc < 6 ? 0 : atoi(argv[5]); int size0 = 0; int size1 = 0; int maxdist = 0; + int noseek; - if (argc < 3) { - printf("tiny_psnr <file1> <file2> [<elem size> [<shift> [<skip bytes>]]]\n"); - printf("WAV headers are skipped automatically.\n"); - return 1; - } + noseek = fseek(f[0], 0, SEEK_SET) || + fseek(f[1], 0, SEEK_SET); - 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 (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) + if (!noseek) { + for (i = 0; i < 2; i++) { + uint8_t *p = buf[i]; + if (fread(p, 1, 12, f[i]) != 12) 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 (!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); } - } else { - fseek(f[i], -12, SEEK_CUR); } - } - fseek(f[shift < 0], abs(shift), SEEK_CUR); + fseek(f[shift < 0], abs(shift), SEEK_CUR); - fseek(f[0], skip_bytes, SEEK_CUR); - fseek(f[1], skip_bytes, 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]); @@ -178,5 +182,41 @@ int main(int argc, char *argv[]) (int)(dev / F), (int)(dev % F), (int)(psnr / F), (int)(psnr % F), maxdist, size0, size1); + return psnr; +} + +int main(int argc, char *argv[]) +{ + FILE *f[2]; + int len = argc < 4 ? 1 : atoi(argv[3]); + 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 (argc < 3) { + printf("tiny_psnr <file1> <file2> [<elem size> [<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 (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; } |
