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authorDerek Buitenhuis <derek.buitenhuis@gmail.com>2016-05-11 19:10:10 +0100
committerDerek Buitenhuis <derek.buitenhuis@gmail.com>2016-05-11 19:13:03 +0100
commit96d616052b3d39678e477fa10610ca688f46fff9 (patch)
tree8bd31d06318bc786ea8f1d84f92090c9c860bc11 /libavdevice/timefilter.c
parent27506aceda8115f82f89691a4441d62a8cf24a6e (diff)
parentd12b5b2f135aade4099f4b26b0fe678656158c13 (diff)
downloadffmpeg-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.c77
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