#ifndef BOO_LTRTPROCESSING_HPP
#define BOO_LTRTPROCESSING_HPP

#include "boo/System.hpp"
#include "boo/audiodev/IAudioVoice.hpp"
#include "Common.hpp"
#include <memory>

#if INTEL_IPP
#include "ipp.h"
#endif

namespace boo
{

#if INTEL_IPP
#define USE_LPF 0

#if USE_LPF
class FIRFilter12k
{
    IppsFIRSpec_32f* m_firSpec;
    Ipp8u* m_firBuffer;
    Ipp32f* m_dlySrc;
    Ipp32f* m_inBuf;
public:
    explicit FIRFilter12k(int windowFrames, double sampleRate);
    ~FIRFilter12k();
    void Process(Ipp32f* buf, int windowFrames);
};
#endif

class WindowedHilbert
{
#if USE_LPF
    FIRFilter12k m_fir;
#endif
    IppsHilbertSpec* m_spec;
    Ipp8u* m_buffer;
    int m_windowFrames, m_halfFrames;
    int m_bufIdx = 0;
    Ipp32f* m_inputBuf;
    Ipp32fc* m_outputBuf;
    Ipp32fc* m_output[4];
    Ipp32f* m_hammingTable;
    void _AddWindow();
public:
    explicit WindowedHilbert(int windowFrames, double sampleRate);
    ~WindowedHilbert();
    void AddWindow(const float* input, int stride);
    void AddWindow(const int32_t* input, int stride);
    void AddWindow(const int16_t* input, int stride);
    template <typename T>
    void Output(T* output, float lCoef, float rCoef) const;
};
#endif

class LtRtProcessing
{
    AudioVoiceEngineMixInfo m_inMixInfo;
    int m_windowFrames;
    int m_halfFrames;
    int m_outputOffset;
    int m_bufferTail = 0;
    int m_bufferHead = 0;
    std::unique_ptr<int16_t[]> m_16Buffer;
    std::unique_ptr<int32_t[]> m_32Buffer;
    std::unique_ptr<float[]> m_fltBuffer;
#if INTEL_IPP
    WindowedHilbert m_hilbertSL, m_hilbertSR;
#endif
    template <typename T> T* _getInBuf();
    template <typename T> T* _getOutBuf();
public:
    LtRtProcessing(int _5msFrames, const AudioVoiceEngineMixInfo& mixInfo);
    template <typename T>
    void Process(const T* input, T* output, int frameCount);
    const AudioVoiceEngineMixInfo& inMixInfo() const { return m_inMixInfo; }
};

}

#endif // BOO_LTRTPROCESSING_HPP