summaryrefslogtreecommitdiff
path: root/libavutil/lfg.c
diff options
context:
space:
mode:
Diffstat (limited to 'libavutil/lfg.c')
-rw-r--r--libavutil/lfg.c58
1 files changed, 0 insertions, 58 deletions
diff --git a/libavutil/lfg.c b/libavutil/lfg.c
index 5ffd76f181..08a4f678e2 100644
--- a/libavutil/lfg.c
+++ b/libavutil/lfg.c
@@ -58,61 +58,3 @@ void av_bmg_get(AVLFG *lfg, double out[2])
out[0] = x1 * w;
out[1] = x2 * w;
}
-
-#ifdef TEST
-#include "log.h"
-#include "timer.h"
-
-int main(void)
-{
- int x = 0;
- int i, j;
- AVLFG state;
-
- av_lfg_init(&state, 0xdeadbeef);
- for (j = 0; j < 10000; j++) {
- START_TIMER
- for (i = 0; i < 624; i++) {
- //av_log(NULL, AV_LOG_ERROR, "%X\n", av_lfg_get(&state));
- x += av_lfg_get(&state);
- }
- STOP_TIMER("624 calls of av_lfg_get");
- }
- av_log(NULL, AV_LOG_ERROR, "final value:%X\n", x);
-
- /* BMG usage example */
- {
- double mean = 1000;
- double stddev = 53;
- double samp_mean = 0.0, samp_stddev = 0.0;
- double samp0, samp1;
-
- av_lfg_init(&state, 42);
-
- for (i = 0; i < 1000; i += 2) {
- double bmg_out[2];
- av_bmg_get(&state, bmg_out);
- samp0 = bmg_out[0] * stddev + mean;
- samp1 = bmg_out[1] * stddev + mean;
- samp_mean += samp0 + samp1;
- samp_stddev += samp0 * samp0 + samp1 * samp1;
- av_log(NULL, AV_LOG_INFO,
- "%f\n%f\n",
- samp0,
- samp1);
- }
- /* TODO: add proper normality test */
- samp_mean /= 1000;
- samp_stddev /= 999;
- samp_stddev -= (1000.0/999.0)*samp_mean*samp_mean;
- samp_stddev = sqrt(samp_stddev);
- av_log(NULL, AV_LOG_INFO, "sample mean : %f\n"
- "true mean : %f\n"
- "sample stddev: %f\n"
- "true stddev : %f\n",
- samp_mean, mean, samp_stddev, stddev);
- }
-
- return 0;
-}
-#endif