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#include "oscillator.h"
#include <stddef.h>
#define _USE_MATH_DEFINES
#include <math.h>
void oscillator_sine_wave(Oscillator *p_oscillator, int p_num_channels)
{
if (p_oscillator->buffer != NULL)
delete[] p_oscillator->buffer;
p_oscillator->buffer = new float[Oscillator::CHANNEL_BUFFER_LENGTH * p_num_channels];
for (int sample = 0; sample < Oscillator::CHANNEL_BUFFER_LENGTH; ++sample)
{
float value = (float) sin(2 * M_PI * sample / Oscillator::CHANNEL_BUFFER_LENGTH);
for (int channel = 0; channel < p_num_channels; ++channel)
{
p_oscillator->buffer[sample * p_num_channels + channel] = value;
}
}
}
void oscillator_square_wave(Oscillator *p_oscillator, int p_num_channels)
{
if (p_oscillator->buffer != NULL)
delete[] p_oscillator->buffer;
p_oscillator->buffer = new float[Oscillator::CHANNEL_BUFFER_LENGTH * p_num_channels];
for (int sample = 0; sample < Oscillator::CHANNEL_BUFFER_LENGTH / 2; ++sample)
for (int channel = 0; channel < p_num_channels; ++channel)
{
p_oscillator->buffer[sample * p_num_channels + channel] = 1.0f;
}
for (int sample = Oscillator::CHANNEL_BUFFER_LENGTH / 2; sample < Oscillator::CHANNEL_BUFFER_LENGTH; ++sample)
for (int channel = 0; channel < p_num_channels; ++channel)
{
p_oscillator->buffer[sample * p_num_channels + channel] = -1.0f;
}
}
void oscillator_saw_tooth(Oscillator *p_oscillator, int p_num_channels)
{
if (p_oscillator->buffer != NULL)
delete[] p_oscillator->buffer;
p_oscillator->buffer = new float[Oscillator::CHANNEL_BUFFER_LENGTH * p_num_channels];
for (int sample = 0; sample < Oscillator::CHANNEL_BUFFER_LENGTH; ++sample)
{
float value = (2.0f * sample / Oscillator::CHANNEL_BUFFER_LENGTH) - 1.0f;
for (int channel = 0; channel < p_num_channels; ++channel)
{
p_oscillator->buffer[sample * p_num_channels + channel] = value;
}
}
}
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