Resampler.hpp

//
//  Resampler.hpp
//  SwitchboardSDK
//
//  Created by Nádor Iván on 2022. 03. 03..
//  Copyright © 2022. Synervoz Inc. All rights reserved.
//
 
#pragma once
 
#include <audio/RingBuffer.hpp>
#include <buffer/AudioData.hpp>
#include <switchboard/export.h>
#include <switchboard_core/AudioBuffer.hpp>
#include <switchboard_core/SwitchboardCore.hpp>
#include <vector>
 
namespace switchboard {
 
struct SWITCHBOARDSDK_EXPORT ResamplerInternals;

class SWITCHBOARDSDK_EXPORT Resampler {
public:
    Resampler(uint maxNumberOfChannels = constants::STEREO, uint maxNumberOfFrames = constants::MAX_NUMBER_OF_FRAMES);

    ~Resampler();

    uint process(
        const AudioBuffer<int16>& input,
        AudioBuffer<int16>& output,
        const uint inputSampleRate,
        const uint outputSampleRate
    );

    uint process(
        const AudioBuffer<float>& input,
        AudioBuffer<float>& output,
        const uint inputSampleRate,
        const uint outputSampleRate
    );

    uint process(
        const int16* input,
        float* output,
        uint inputSampleRate,
        uint outputSampleRate,
        uint numberOfInputFrames,
        uint maxNumberOfOutputFrames,
        uint numChannels,
        bool endOfInput = false
    );

    uint process(
        const float* input,
        float* output,
        uint inputSampleRate,
        uint outputSampleRate,
        uint numberOfInputFrames,
        uint maxNumberOfOutputFrames,
        uint numChannels,
        bool endOfInput = false
    );

    void process(
        const float* input,
        float* output,
        uint inputSampleRate,
        uint outputSampleRate,
        uint numberOfInputFrames,
        uint maxNumberOfOutputFrames,
        uint numChannels,
        bool endOfInput,
        uint& numberOfInputFramesUsed,
        uint& numberOfOutputFramesGenerated
    );

    uint process(
        const std::vector<float>& input,
        std::vector<float>& output,
        const uint inputSampleRate,
        const uint outputSampleRate,
        uint numChannels
    );

    void reset();

    int getNumberOfBufferedFrames() const;
 
private:
    ResamplerInternals* internals;
 
    buffer::AudioData<float> tempInputBuffer;
    buffer::AudioData<float> tempOutputBuffer;
    audio::RingBuffer<float> ringBuffer;
};
 
}