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.
 *
 * 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_NTSystem.h"
    class AU_API AU_Input : public UT_AudioInput, public AU_NTSystem
#elif defined(MBSD)
    class AU_MBSDUtilAudioInfo;

    class AU_API AU_Input : public UT_AudioInput
#elif defined(LINUX)

    class AU_API AU_Input : public UT_AudioInput
#else
    #error Unsupported platform
#endif
{
public:

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

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

    int         getGlobalRate() override;

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

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

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

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);
    
    int         myPort;

    // 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

#elif defined(LINUX)
    void        adjustRate(int read);
    
    int         myRate;
    int         myIsOpen;

#else
    #error Unsupported platform
#endif
};

#endif