diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2012-03-02 06:21:48 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2012-03-02 16:00:21 +0100 |
| commit | a5bf9b351cc0db2b95cc199e30f2ec7325009c3a (patch) | |
| tree | ff33d4b2afbbad31eb2cd40f25d22ad189a46200 /libavdevice/timefilter.c | |
| parent | ec3cd74f2dab8e3e8234ccb994132b23d3098585 (diff) | |
| download | ffmpeg-a5bf9b351cc0db2b95cc199e30f2ec7325009c3a.tar.gz | |
timefilter: better selftest code.
Add support for divergence detection and variable period.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavdevice/timefilter.c')
| -rw-r--r-- | libavdevice/timefilter.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/libavdevice/timefilter.c b/libavdevice/timefilter.c index ff6552f7d7..e225ed11a9 100644 --- a/libavdevice/timefilter.c +++ b/libavdevice/timefilter.c @@ -89,6 +89,7 @@ int main(void) #define SAMPLES 1000 double ideal[SAMPLES]; double samples[SAMPLES]; + double samplet[SAMPLES]; #if 1 for (n0 = 0; n0 < 40; n0 = 2 * n0 + 1) { for (n1 = 0; n1 < 10; n1 = 2 * n1 + 1) { @@ -100,13 +101,16 @@ int main(void) #endif double best_error = 1000000000; double bestpar0 = 1; - double bestpar1 = 0.001; + double bestpar1 = 1; int better, i; av_lfg_init(&prng, 123); for (i = 0; i < SAMPLES; i++) { - ideal[i] = 10 + i + n1 * i / (1000); + 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 { @@ -118,7 +122,9 @@ int main(void) TimeFilter *tf = ff_timefilter_new(1, par0, par1); for (i = 0; i < SAMPLES; i++) { double filtered; - filtered = ff_timefilter_update(tf, samples[i], 1); + 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); |