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#pragma once
#include "DspBase.h"
#include <soxr.h>
namespace SaneAudioRenderer
{
class DspRate final
: public DspBase
{
public:
DspRate() = default;
DspRate(const DspRate&) = delete;
DspRate& operator=(const DspRate&) = delete;
~DspRate();
void Initialize(bool variable, uint32_t inputRate, uint32_t outputRate, uint32_t channels);
std::wstring Name() override { return L"Rate"; }
bool Active() override;
void Process(DspChunk& chunk) override;
void Finish(DspChunk& chunk) override;
void Adjust(REFERENCE_TIME time);
private:
enum class State
{
Passthrough,
Constant,
Variable,
};
DspChunk ProcessChunk(soxr_t soxr, DspChunk& chunk);
DspChunk ProcessEosChunk(soxr_t soxr, DspChunk& chunk);
void FinishStateTransition(DspChunk& processedChunk, DspChunk& unprocessedChunk, bool eos);
void CreateBackend();
soxr_t GetBackend();
void DestroyBackends();
soxr_t m_soxrc = nullptr;
soxr_t m_soxrv = nullptr;
State m_state = State::Passthrough;
bool m_inStateTransition = false;
std::pair<bool, size_t> m_transitionCorrelation;
std::pair<DspChunk, DspChunk> m_transitionChunks;
uint32_t m_inputRate = 0;
uint32_t m_outputRate = 0;
uint32_t m_channels = 0;
uint64_t m_variableInputFrames = 0;
uint64_t m_variableOutputFrames = 0;
uint64_t m_variableDelay = 0; // In input samples.
REFERENCE_TIME m_adjustTime = 0; // Negative time - less samples, positive time - more samples.
};
}
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