audio.h

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// Neurosis Engine - LP23.com
// Copyright © Luigi Pino. All rights reserved.

/***************************************************************************/

#ifndef _NEUROSIS_ENGINE_AUDIO_H_
#define _NEUROSIS_ENGINE_AUDIO_H_

/***************************************************************************/

#include "../neurosis/openal/vorbisfile.h"
#include <vector>

/***************************************************************************/

#pragma comment(lib, "code/neurosis/openal/ogg_static.lib")
#pragma comment(lib, "code/neurosis/openal/openal32.lib")
#pragma comment(lib, "code/neurosis/openal/vorbis_static.lib")
#pragma comment(lib, "code/neurosis/openal/vorbisfile_static.lib")

/***************************************************************************/

//------------------------------------------------
#define AUDIO_BUFFER              32768               // 32 KB buffer
#define AL_PLAYING                0x1012
#define AL_PAUSED                 0x1013
#define AL_STOPPED                0x1014
//------------------------------------------------

/***************************************************************************/

class CNeurosisAudio {
  public:
    CNeurosisAudio(int totalChannels = 4);
    ~CNeurosisAudio();

    void  Clear(int iChannel);
    int   Get_State(int iChannel);
    bool  Is_Initialized();
    bool  Load(int iChannel, char *filename, bool stream);
    void  Loop(int iChannel, bool loopAudio);
    void  Play(int iChannel);
    void  Pause(int iChannel);
    void  Stop(int iChannel);
    void  Volume(int iChannel, float volumeAmount);
    void  Update();

  private:
    class CAudioData {
      public:
        bool  Stream(unsigned int buffer);
        void  Update();

        OggVorbis_File    pOggFile;                   // File pointer for streaming data
        std::vector<char> pBufferData;                // Buffer for non-streaming data

        bool              mInUse;                     // Whether data file was loaded
        bool              mLoop;                      // Whether to loop audio
        bool              mStream;                    // Whether to stream audio
        int               mFormat;                    // AL_FORMAT_MONO16, AL_FORMAT_STEREO16;
        int               mSamplingRate;              // Frequency
//      int               mState;                     // AL_PLAYING, AL_PAUSED, AL_STOPPED
        unsigned int      mBufferID[2];               // Buffer
        unsigned int      mSourceID;                  // Audio index
    };

    CAudioData  *pAudio;
    int         mTotalChannels;                       // If mTotalChannels = 0, then OpenAl is not initialized
};

/***************************************************************************/
#endif