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Fixed maths in testaudiostreamdynamicresample (and just show the actual scale)

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Brick 2023-08-20 22:50:41 +01:00 • committed by Ryan C. Gordon
parent 14e38b17d6
commit d2b9c8b80d
1 changed files with 10 additions and 12 deletions
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22
test/testaudiostreamdynamicresample.c
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@ -66,25 +66,23 @@ static void loop(void)
SDL_AudioSpec newspec; SDL_AudioSpec newspec;
char title[64]; char title[64];
int newfreq = spec.freq; int newfreq = spec.freq;
float scale = 1.0f;
multiplier = newmultiplier; multiplier = newmultiplier;
if (multiplier == 0) {
SDL_snprintf(title, sizeof (title), "Drag the slider: Normal speed"); if (multiplier < 0) {
} else if (multiplier < 0) { scale = 100.0f / (100.0f - multiplier);
SDL_snprintf(title, sizeof (title), "Drag the slider: %.2fx slow", (-multiplier / 100.0f) + 1.0f); } else if (multiplier > 0) {
} else { scale = (multiplier + 100.0f) / 100.0f;
SDL_snprintf(title, sizeof (title), "Drag the slider: %.2fx fast", (multiplier / 100.0f) + 1.0f);
} }
SDL_snprintf(title, sizeof (title), "Drag the slider: %.2fx speed", scale);
for (i = 0; i < state->num_windows; i++) { for (i = 0; i < state->num_windows; i++) {
SDL_SetWindowTitle(state->windows[i], title); SDL_SetWindowTitle(state->windows[i], title);
} }
/* this math sucks, but whatever. */ newfreq = (int) (spec.freq * scale);
if (multiplier < 0) {
newfreq = spec.freq + (int) ((spec.freq * (multiplier / 400.0f)) * 0.75f);
} else if (multiplier > 0) {
newfreq = spec.freq + (int) (spec.freq * (multiplier / 100.0f));
}
/* SDL_Log("newfreq=%d multiplier=%d\n", newfreq, multiplier); */ /* SDL_Log("newfreq=%d multiplier=%d\n", newfreq, multiplier); */
SDL_memcpy(&newspec, &spec, sizeof (spec)); SDL_memcpy(&newspec, &spec, sizeof (spec));
newspec.freq = newfreq; newspec.freq = newfreq;