You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
1.0 KiB
44 lines
1.0 KiB
#pragma once
|
|
|
|
#include <sys/_stdint.h>
|
|
#include <vector>
|
|
|
|
#include "span.hpp"
|
|
|
|
#include "sample.hpp"
|
|
|
|
namespace audio {
|
|
|
|
class Resampler {
|
|
public:
|
|
Resampler(uint32_t source_sample_rate,
|
|
uint32_t target_sample_rate,
|
|
uint8_t num_channels);
|
|
|
|
~Resampler();
|
|
|
|
auto source_sample_rate() -> uint32_t { return source_sample_rate_; }
|
|
auto target_sample_rate() -> uint32_t { return target_sample_rate_; }
|
|
auto channels() -> uint_fast8_t { return num_channels_; }
|
|
|
|
auto Process(cpp::span<const sample::Sample> input,
|
|
cpp::span<sample::Sample> output,
|
|
bool end_of_data) -> std::pair<size_t,size_t>;
|
|
|
|
private:
|
|
auto Subsample(int channel) -> float;
|
|
auto ApplyFilter(cpp::span<float> filter, cpp::span<float> input) -> float;
|
|
|
|
uint32_t source_sample_rate_;
|
|
uint32_t target_sample_rate_;
|
|
float factor_;
|
|
uint8_t num_channels_;
|
|
|
|
std::vector<float*> channel_buffers_;
|
|
size_t channel_buffer_size_;
|
|
|
|
float output_offset_;
|
|
int32_t input_index_;
|
|
};
|
|
|
|
} // namespace audio
|