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Add some APIs to allow dynamics changes to waveform parameters.

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This commit is contained in:
David Reid
2020-02-19 17:40:07 +10:00
parent 8a7a65c271
commit f98fd001de
1 changed files with 33 additions and 0 deletions
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miniaudio.h
+33
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@@ -4742,6 +4742,9 @@ typedef struct
ma_result ma_waveform_init(ma_waveform_type type, double amplitude, double frequency, ma_uint32 sampleRate, ma_waveform* pWaveform);
ma_uint64 ma_waveform_read_pcm_frames(ma_waveform* pWaveform, void* pFramesOut, ma_uint64 frameCount, ma_format format, ma_uint32 channels);
ma_result ma_waveform_set_amplitude(ma_waveform* pWaveform, double amplitude);
ma_result ma_waveform_set_frequency(ma_waveform* pWaveform, double frequency);
ma_result ma_waveform_set_sample_rate(ma_waveform* pWaveform, ma_uint32 sampleRate);
#ifdef __cplusplus
}
@@ -37894,6 +37897,36 @@ ma_result ma_waveform_init(ma_waveform_type type, double amplitude, double frequ
return MA_SUCCESS;
}
ma_result ma_waveform_set_amplitude(ma_waveform* pWaveform, double amplitude)
{
if (pWaveform == NULL) {
return MA_INVALID_ARGS;
}
pWaveform->amplitude = amplitude;
return MA_SUCCESS;
}
ma_result ma_waveform_set_frequency(ma_waveform* pWaveform, double frequency)
{
if (pWaveform == NULL) {
return MA_INVALID_ARGS;
}
pWaveform->frequency = frequency;
return MA_SUCCESS;
}
ma_result ma_waveform_set_sample_rate(ma_waveform* pWaveform, ma_uint32 sampleRate)
{
if (pWaveform == NULL) {
return MA_INVALID_ARGS;
}
pWaveform->deltaTime = 1.0 / sampleRate;
return MA_SUCCESS;
}
static float ma_waveform_sine_f32(double time, double frequency, double amplitude)
{
return (float)(ma_sin(MA_TAU_D * time * frequency) * amplitude);