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voltest: extend test to verify correctness of _multiply() and _divide()

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This commit is contained in:
Lennart Poettering 2009-08-19 01:02:32 +02:00
parent 2223a9f938
commit a69b729414
3 changed files with 37 additions and 48 deletions
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36
src/tests/voltest.c
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@ -33,6 +33,8 @@ int main(int argc, char *argv[]) {
pa_cvolume cv;
float b;
pa_channel_map map;
pa_volume_t md = 0;
unsigned mdn = 0;
printf("Attenuation of sample 1 against 32767: %g dB\n", 20.0*log10(1.0/32767.0));
printf("Smallest possible attenutation > 0 applied to 32767: %li\n", lrint(32767.0*pa_sw_volume_to_linear(1)));
@ -85,16 +87,48 @@ int main(int argc, char *argv[]) {
printf("After: volume: [%s]; balance: %2.1f (intended: %2.1f) %s\n", pa_cvolume_snprint(s, sizeof(s), &r), k, b, k < b-.05 || k > b+.5 ? "MISMATCH" : "");
}
for (v = PA_VOLUME_MUTED; v <= PA_VOLUME_NORM*2; v += 1) {
for (v = PA_VOLUME_MUTED; v <= PA_VOLUME_NORM*2; v += 51) {
double l = pa_sw_volume_to_linear(v);
pa_volume_t k = pa_sw_volume_from_linear(l);
double db = pa_sw_volume_to_dB(v);
pa_volume_t r = pa_sw_volume_from_dB(db);
pa_volume_t w;
pa_assert(k == v);
pa_assert(r == v);
for (w = PA_VOLUME_MUTED; w < PA_VOLUME_NORM*2; w += 37) {
double t = pa_sw_volume_to_linear(w);
double db2 = pa_sw_volume_to_dB(w);
pa_volume_t p, p1, p2;
double q, qq;
p = pa_sw_volume_multiply(v, w);
qq = db + db2;
p2 = pa_sw_volume_from_dB(qq);
q = l*t;
p1 = pa_sw_volume_from_linear(q);
if (p2 > p && p2 - p > md)
md = p2 - p;
if (p2 < p && p - p2 > md)
md = p - p2;
if (p1 > p && p1 - p > md)
md = p1 - p;
if (p1 < p && p - p1 > md)
md = p - p1;
if (p1 != p || p2 != p)
mdn++;
}
}
printf("max deviation: %lu n=%lu\n", (unsigned long) md, (unsigned long) mdn);
pa_assert(md <= 1);
pa_assert(mdn <= 251);
return 0;
}