audioconverter.h

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/********************************************************************************************
 * Twitch Broadcasting SDK
 *
 * This software is supplied under the terms of a license agreement with Twitch Interactive, Inc. and
 * may not be copied or used except in accordance with the terms of that agreement
 * Copyright (c) 2012-2017 Twitch Interactive, Inc.
 *
 *********************************************************************************************/

#pragma once

#include "twitchsdk/broadcast/internal/audioconvert/audioconvertcontext.h"
#include "twitchsdk/broadcast/internal/audioconvert/audioconvertpipeline.h"

namespace ttv
{
    class IAudioConverter
    {
    public:
        virtual void BindInputBuffer(const void* buffer, SampleRange range) = 0;
        
        virtual SampleRange GetOutputSampleRange() const = 0;
        
        virtual SampleRange TransferToOutputBuffer(void* buffer, SampleRange range) = 0;
        
        virtual void UnbindInputBuffer() = 0;
    };
    
    
    template <typename InputBufferFormat, typename OutputBufferFormat, typename AudioConvertOptions = void>
    class AudioConverter : public IAudioConverter
    {
    public:
        AudioConverter()
        :   mPipeline(mContext)
        {
        }

        
        virtual void BindInputBuffer(const void* buffer, SampleRange range) override
        {
            mPipeline.BindInputBuffer(reinterpret_cast<const typename InputBufferFormat::SampleType*>(buffer), range);
        }


        virtual SampleRange GetOutputSampleRange() const override
        {
            return mPipeline.GetOutputSampleRange();
        }
        
        
        virtual SampleRange TransferToOutputBuffer(void* buffer, SampleRange range) override
        {
            return mPipeline.TransferToOutputBuffer(reinterpret_cast<typename OutputBufferFormat::SampleType*>(buffer), range);
        }
        
        
        virtual void UnbindInputBuffer() override
        {
            mPipeline.UnbindInputBuffer();
        }
        
    private:
        using ContextType = AudioConvertContext<AudioConvertOptions>;
        
        ContextType mContext;
        AudioConvertPipeline<InputBufferFormat, OutputBufferFormat, ContextType> mPipeline;
    };
}