AU/AU_Input.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * Produced by:
 *      Mark Alexander
 *      Side Effects Software Inc
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        AU_Input.h ( AU Library, C++)
 *
 * COMMENTS:
 */

#ifndef __AU_Input__
#define __AU_Input__

#include "AU_API.h"
#include <UT/UT_AudioInput.h>

#define AU_MAX_VOL_CHANNELS     4


#if defined(WIN32)
    #include "AU_System.h"
    class AU_API AU_Input : public UT_AudioInput, public AU_System
#elif defined(MBSD)
    class AU_MBSDUtilAudioInfo;

    class AU_API AU_Input : public UT_AudioInput
#else
#ifdef IRIX6
    #include <dmedia/audio.h>
#else
    #include <audio.h>
#endif

    class AU_API AU_Input : public UT_AudioInput
#endif
{
public:

                 AU_Input(int channels, int rate);
    virtual     ~AU_Input();

    virtual int         open(float queuesize);
    virtual void        close();
    
    virtual int         hasInput();
    virtual short *     getInput(int size);

    virtual int         getGlobalRate();

    virtual int         setSource(int source);
    virtual int         getSource();
    
    virtual int         setMicrophoneMode(int stereo);
    virtual int         getMicrophoneMode();
    virtual int         getChannelMode();

    virtual int         setVolume(int speaker, float vol);
    virtual float       getVolume(int speaker);

    virtual UT_AudioInput * newAudioInputDevice(int channels, int rate);

private:
#ifdef WIN32
    // Creates a new wave header with its data block at pos in myQueue.
    void        appendWaveHeader(int pos);
    // Apply volume adjustments, and copy 2 channels to 4 if required
    void        applyVolume(char *data, int bytesPerChannel);
    
    // Specifies the input source.
    int         mySource;
    // The size of each wave packet (in bytes).
    int         myBlockSize;
    // The number of bytes copied from the last incomplete block.
    int         myBlockOffset;
    // NT doesn't allow setting of input volume, so we fake it.
    float       myVolumes[4];

#elif defined(MBSD) 
    // adjust the volume
    void        applyVolume(char *data, int data_size );

    AU_MBSDUtilAudioInfo *  myInfo; // audio info (rate, buffers, etc).
    int         myRate;             // sample rate
    int         myChannels;         // number of channels
    int         mySource;           // specifies the input source
    float       myVolumes[ AU_MAX_VOL_CHANNELS ];   // volumes per channel

#else
    void        adjustRate(int read);
    
    ALport      myPort;
    short       *myOverrunBuffer;
    int         myRate;
    int         myChannels;
    int         myMode;
    int         myIsOpen;
#endif
};

#endif

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