include/cinder/audio/OutputImplXAudio.h

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/*
 Copyright (c) 2009, The Barbarian Group
 All rights reserved.

 Redistribution and use in source and binary forms, with or without modification, are permitted provided that
 the following conditions are met:

    * Redistributions of source code must retain the above copyright notice, this list of conditions and
    the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
    the following disclaimer in the documentation and/or other materials provided with the distribution.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE.
*/

#pragma once

#include "cinder/audio/Output.h"
#include "cinder/msw/CinderMSW.h"
#include "cinder/CinderMath.h"
#include "cinder/audio/FftProcessor.h"
#include "cinder/Thread.h"

#include <windows.h>
#undef min
#undef max
#include <xaudio2.h>

namespace cinder { namespace audio {

class OutputImplXAudio;

class TargetOutputImplXAudio : public Target {
  public: 
    static std::shared_ptr<TargetOutputImplXAudio> createRef( const WAVEFORMATEX *aOutDescription ){ return std::shared_ptr<TargetOutputImplXAudio>( new TargetOutputImplXAudio( aOutDescription ) );  }
    ~TargetOutputImplXAudio() {}
  private:
    TargetOutputImplXAudio( const WAVEFORMATEX *aOutDescription );
};

class OutputImplXAudio : public OutputImpl 
{
  public:
    OutputImplXAudio();
    ~OutputImplXAudio();
    TrackRef    addTrack( SourceRef aSource, bool autoplay );
    void        removeTrack( TrackId );
    
    void setVolume( float aVolume ) {}
    float getVolume() const { /*TODO*/ return 0.0; }

    //TargetRef getTarget();
  protected:
    ::IXAudio2                          * mXAudio;
    ::IXAudio2MasteringVoice            * mMasterVoice;
    
    class Track : public cinder::audio::Track
    {
      public:
        Track( SourceRef source, OutputImplXAudio * output );
        ~Track();
        void play();
        void stop();
        bool isPlaying() const { return mIsPlaying; }
        
        TrackId getTrackId() const { return mTrackId; }
        
        void setVolume( float aVolume );
        float getVolume() const;
        
        double getTime() const { return mLoader->getSampleOffset() / mVoiceDescription.nChannels / (double)mVoiceDescription.nSamplesPerSec; }
        void setTime( double aTime ) { mLoader->setSampleOffset( aTime * mVoiceDescription.nSamplesPerSec * mVoiceDescription.nChannels ); }

        void setLooping( bool isLooping ) { mIsLooping = isLooping; }
        bool isLooping() const { return mIsLooping; }
        
        void enablePcmBuffering( bool isBuffering ) { mIsPcmBuffering = isBuffering; }
        bool isPcmBuffering() { return mIsPcmBuffering; }

        PcmBuffer32fRef getPcmBuffer();
      private:
        //static ::HRESULT              dataInputCallback( void * audioData, uint32_t dataSize, void * theTrack, uint64_t sampleTime, uint32_t sampleDuration );
        void fillBuffer();

        static const int                sMaxBufferCount = 3;
        
        bool                            mIsLooping;
        bool                            mIsPlaying;
        TrackId                         mTrackId;
        SourceRef                       mSource;
        LoaderRef                       mLoader;
        OutputImplXAudio                * mOutput;
        
        IXAudio2SourceVoice             * mSourceVoice;
        WAVEFORMATEX                    mVoiceDescription;
        uint8_t                         * mDecodedBuffers;

        uint32_t                        mBufferSize;
        uint32_t                        mSamplesPerBuffer;
        uint32_t                        mCurrentBuffer;
        uint64_t                        mCurrentTime;

        HANDLE                          mBufferEndEvent;
        std::shared_ptr<std::thread>    mQueueThread;

        bool mIsPcmBuffering;
        PcmBuffer32fRef mLoadingPcmBuffer;
        PcmBuffer32fRef mLoadedPcmBuffer;
        std::mutex  mPcmBufferMutex;

        class SourceCallback : public IXAudio2VoiceCallback
        {
        public:
            //HANDLE                            mBufferEndEvent;
            OutputImplXAudio::Track             * mTrack;
                
            SourceCallback()
                /*: mBufferEndEvent( CreateEvent( NULL, FALSE, FALSE, NULL ) )*/{}
            ~SourceCallback(){ /*CloseHandle( mBufferEndEvent );*/ }
            void STDMETHODCALLTYPE OnBufferEnd( void* pvContext ) {
                SetEvent( mTrack->mBufferEndEvent );
            }

            //Unused methods are stubs
            void STDMETHODCALLTYPE OnStreamEnd() {}
            void STDMETHODCALLTYPE OnVoiceProcessingPassEnd() { }
            void STDMETHODCALLTYPE OnVoiceProcessingPassStart(UINT32 SamplesRequired) {    }
            void STDMETHODCALLTYPE OnBufferStart(void * pBufferContext) {  }
            void STDMETHODCALLTYPE OnLoopEnd(void * pBufferContext) {    }
            void STDMETHODCALLTYPE OnVoiceError(void * pBufferContext, HRESULT Error) { }
        };

        SourceCallback                  mVoiceCallback;
    };

    std::map<TrackId,std::shared_ptr<OutputImplXAudio::Track> > mTracks;    
};

}} //namespaces