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jLynx 2023-05-19 08:16:05 +12:00 • committed by GitHub
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commit 033c4e9a5b
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62
firmware/baseband/linear_resampler.hpp
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@ -26,44 +26,42 @@ namespace dsp {
namespace interpolation {
class LinearResampler {
public:
void configure(
const float input_rate,
const float output_rate
) {
phase_increment = calculate_increment(input_rate, output_rate);
}
public:
void configure(
const float input_rate,
const float output_rate) {
phase_increment = calculate_increment(input_rate, output_rate);
}
template<typename InterpolatedSampleHandler>
void operator()(
const float sample,
InterpolatedSampleHandler interpolated_sample_handler
) {
const float sample_delta = sample - last_sample;
while( phase < 1.0f ) {
const float interpolated_value = last_sample + phase * sample_delta;
interpolated_sample_handler(interpolated_value);
phase += phase_increment;
}
last_sample = sample;
phase -= 1.0f;
}
template <typename InterpolatedSampleHandler>
void operator()(
const float sample,
InterpolatedSampleHandler interpolated_sample_handler) {
const float sample_delta = sample - last_sample;
while (phase < 1.0f) {
const float interpolated_value = last_sample + phase * sample_delta;
interpolated_sample_handler(interpolated_value);
phase += phase_increment;
}
last_sample = sample;
phase -= 1.0f;
}
void advance(const float fraction) {
phase += (fraction * phase_increment);
}
void advance(const float fraction) {
phase += (fraction * phase_increment);
}
private:
float last_sample { 0.0f };
float phase { 0.0f };
float phase_increment { 0.0f };
private:
float last_sample{0.0f};
float phase{0.0f};
float phase_increment{0.0f};
static constexpr float calculate_increment(const float input_rate, const float output_rate) {
return input_rate / output_rate;
}
static constexpr float calculate_increment(const float input_rate, const float output_rate) {
return input_rate / output_rate;
}
};
} /* namespace interpolation */
} /* namespace dsp */
#endif/*__LINEAR_RESAMPLER_H__*/
#endif /*__LINEAR_RESAMPLER_H__*/