AudioGraphResampler.hpp

//
//  AudioGraphResampler.hpp
//  SwitchboardSDK
//
//  Created by Balazs Kiss on 2025. 04. 15..
//
 
#pragma once
 
#include <audio/ResamplingFIFO.hpp>
#include <buffer/AudioData.hpp>
#include <functional>
#include <memory>
#include <switchboard/export.h>
#include <switchboard_core/AudioBusList.hpp>
 
namespace switchboard {

class SWITCHBOARDSDK_EXPORT AudioGraphResampler {
public:
    using ProcessCallback = std::function<bool(AudioBusList& inAudioBuses, AudioBusList& outAudioBuses)>;

    AudioGraphResampler(int sampleRate, int bufferSize);

    ~AudioGraphResampler();

    void setProcessCallback(ProcessCallback callback);

    bool setNumberOfBuses(const uint numberOfInputBuses, const uint numberOfOutputBuses);

    bool process(AudioBusList& inAudioBuses, AudioBusList& outAudioBuses);
 
private:
    ProcessCallback processCallback;
    int sampleRate;
    int bufferSize;
    int numberOfInputBuses;
    int numberOfOutputBuses;
    std::unique_ptr<audio::ResamplingFIFO> inputResamplingFIFO;
    std::unique_ptr<audio::ResamplingFIFO> outputResamplingFIFO;
    buffer::AudioData<float> interleavedData;
    buffer::AudioData<float> callbackInAudioData;
    buffer::AudioData<float> callbackOutAudioData;
 
    bool callProcessCallback(AudioBuffer<float>* inBuffer, AudioBuffer<float>* outBuffer);
    void configureResamplers(AudioBuffer<float>* inBuffer, AudioBuffer<float>* outBuffer);
    bool process(AudioBuffer<float>* inBuffer, AudioBuffer<float>* outBuffer);
    void pushInputBufferToResampler(AudioBuffer<float>& buffer);
    void popInputBufferFromResampler(AudioBuffer<float>& buffer);
    void pushOutputBufferToResampler(AudioBuffer<float>& buffer);
    void popOutputBufferFromResampler(AudioBuffer<float>& buffer);
};
 
}