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examples: use doubles to generate sine waves and avoid distortion

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mausimus
2025-01-13 19:38:10 +09:00
committed by Ryan C. Gordon
parent 307e6f2ca6
commit 03a3c19c27
2 changed files with 4 additions and 4 deletions
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4
examples/audio/01-simple-playback/simple-playback.c
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@@ -76,9 +76,9 @@ SDL_AppResult SDL_AppIterate(void *appstate)
for (i = 0; i < SDL_arraysize(samples); i++) {
/* You don't have to care about this math; we're just generating a simple sine wave as we go.
https://en.wikipedia.org/wiki/Sine_wave */
const float time = total_samples_generated / 8000.0f;
const double time = total_samples_generated / 8000.0;
const int sine_freq = 500; /* run the wave at 500Hz */
samples[i] = SDL_sinf(6.283185f * sine_freq * time);
samples[i] = (float)SDL_sin(6.283185 * sine_freq * time);
total_samples_generated++;
}

4
examples/audio/02-simple-playback-callback/simple-playback-callback.c
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@@ -36,9 +36,9 @@ static void SDLCALL FeedTheAudioStreamMore(void *userdata, SDL_AudioStream *astr
for (i = 0; i < total; i++) {
/* You don't have to care about this math; we're just generating a simple sine wave as we go.
https://en.wikipedia.org/wiki/Sine_wave */
const float time = total_samples_generated / 8000.0f;
const double time = total_samples_generated / 8000.0;
const int sine_freq = 500; /* run the wave at 500Hz */
samples[i] = SDL_sinf(6.283185f * sine_freq * time);
samples[i] = (float)SDL_sin(6.283185 * sine_freq * time);
total_samples_generated++;
}