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author | Derek Buitenhuis <derek.buitenhuis@gmail.com> | 2016-05-11 19:10:10 +0100 |
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committer | Derek Buitenhuis <derek.buitenhuis@gmail.com> | 2016-05-11 19:13:03 +0100 |
commit | 96d616052b3d39678e477fa10610ca688f46fff9 (patch) | |
tree | 8bd31d06318bc786ea8f1d84f92090c9c860bc11 /libavdevice/timefilter.c | |
parent | 27506aceda8115f82f89691a4441d62a8cf24a6e (diff) | |
parent | d12b5b2f135aade4099f4b26b0fe678656158c13 (diff) | |
download | ffmpeg-96d616052b3d39678e477fa10610ca688f46fff9.tar.gz |
Merge commit 'd12b5b2f135aade4099f4b26b0fe678656158c13'
* commit 'd12b5b2f135aade4099f4b26b0fe678656158c13':
build: Split test programs off into separate files
Some conversions done by: James Almer <jamrial@gmail.com>
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Diffstat (limited to 'libavdevice/timefilter.c')
-rw-r--r-- | libavdevice/timefilter.c | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/libavdevice/timefilter.c b/libavdevice/timefilter.c index a4ae204139..ad6485d5e7 100644 --- a/libavdevice/timefilter.c +++ b/libavdevice/timefilter.c @@ -89,80 +89,3 @@ double ff_timefilter_eval(TimeFilter *self, double delta) { return self->cycle_time + self->clock_period * delta; } - -#ifdef TEST -#include "libavutil/lfg.h" -#define LFG_MAX ((1LL << 32) - 1) - -int main(void) -{ - AVLFG prng; - double n0, n1; -#define SAMPLES 1000 - double ideal[SAMPLES]; - double samples[SAMPLES]; - double samplet[SAMPLES]; - for (n0 = 0; n0 < 40; n0 = 2 * n0 + 1) { - for (n1 = 0; n1 < 10; n1 = 2 * n1 + 1) { - double best_error = 1000000000; - double bestpar0 = n0 ? 1 : 100000; - double bestpar1 = 1; - int better, i; - - av_lfg_init(&prng, 123); - for (i = 0; i < SAMPLES; i++) { - samplet[i] = 10 + i + (av_lfg_get(&prng) < LFG_MAX/2 ? 0 : 0.999); - ideal[i] = samplet[i] + n1 * i / (1000); - samples[i] = ideal[i] + n0 * (av_lfg_get(&prng) - LFG_MAX / 2) / (LFG_MAX * 10LL); - if(i && samples[i]<samples[i-1]) - samples[i]=samples[i-1]+0.001; - } - - do { - double par0, par1; - better = 0; - for (par0 = bestpar0 * 0.8; par0 <= bestpar0 * 1.21; par0 += bestpar0 * 0.05) { - for (par1 = bestpar1 * 0.8; par1 <= bestpar1 * 1.21; par1 += bestpar1 * 0.05) { - double error = 0; - TimeFilter *tf = ff_timefilter_new(1, par0, par1); - if (!tf) { - printf("Could not allocate memory for timefilter.\n"); - exit(1); - } - for (i = 0; i < SAMPLES; i++) { - double filtered; - filtered = ff_timefilter_update(tf, samples[i], i ? (samplet[i] - samplet[i-1]) : 1); - if(filtered < 0 || filtered > 1000000000) - printf("filter is unstable\n"); - error += (filtered - ideal[i]) * (filtered - ideal[i]); - } - ff_timefilter_destroy(tf); - if (error < best_error) { - best_error = error; - bestpar0 = par0; - bestpar1 = par1; - better = 1; - } - } - } - } while (better); -#if 0 - double lastfil = 9; - TimeFilter *tf = ff_timefilter_new(1, bestpar0, bestpar1); - for (i = 0; i < SAMPLES; i++) { - double filtered; - filtered = ff_timefilter_update(tf, samples[i], 1); - printf("%f %f %f %f\n", i - samples[i] + 10, filtered - samples[i], - samples[FFMAX(i, 1)] - samples[FFMAX(i - 1, 0)], filtered - lastfil); - lastfil = filtered; - } - ff_timefilter_destroy(tf); -#else - printf(" [%12f %11f %9f]", bestpar0, bestpar1, best_error); -#endif - } - printf("\n"); - } - return 0; -} -#endif |