jamulus/mac/sound.h

/******************************************************************************\
 * Copyright (c) 2004-2011
 *
 * Author(s):
 *  Volker Fischer
 *
 ******************************************************************************
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
\******************************************************************************/

#if !defined(_SOUND_H__9518A621345F78_363456876UZGSDF82CF549__INCLUDED_)
#define _SOUND_H__9518A621345F78_363456876UZGSDF82CF549__INCLUDED_

#include <CoreServices/CoreServices.h>
#include <AudioUnit/AudioUnit.h>
#include <CoreAudio/AudioHardware.h>
#include <QMutex>
#include "util.h"
#include "soundbase.h"
#include "global.h"


/* Classes ********************************************************************/
class CSound : public CSoundBase
{
public:
    CSound ( void (*fpNewProcessCallback) ( CVector<short>& psData, void* arg ), void* arg );
    virtual ~CSound() { CloseCoreAudio(); }

    virtual int  Init ( const int iNewPrefMonoBufferSize );
    virtual void Start();
    virtual void Stop();

    // these variables should be protected but cannot since we want
    // to access them from the callback function
    CVector<short> vecsTmpAudioSndCrdStereo;
    int            iCoreAudioBufferSizeMono;
    int            iCoreAudioBufferSizeStero;

protected:
    virtual QString  LoadAndInitializeDriver ( int iIdx );

    QString CheckDeviceCapabilities ( ComponentInstance& NewAudioInputUnit,
                                      ComponentInstance& NewAudioOutputUnit );

    void CloseCoreAudio();

    UInt32 SetBufferSize ( AudioDeviceID& audioDeviceID,
                           const bool     bIsInput,
                           UInt32         iPrefBufferSize );

    void GetAudioDeviceInfos ( const AudioDeviceID DeviceID,
                               QString&            strDeviceName,
                               bool&               bIsInput,
                               bool&               bIsOutput );

    // callbacks
    static OSStatus deviceNotification ( AudioDeviceID,
                                         UInt32,
                                         Boolean,
                                         AudioDevicePropertyID inPropertyID,
                                         void*                 inRefCon );

    static OSStatus processInput ( void*                       inRefCon,
                                   AudioUnitRenderActionFlags* ioActionFlags,
                                   const AudioTimeStamp*       inTimeStamp,
                                   UInt32                      inBusNumber,
                                   UInt32                      inNumberFrames,
                                   AudioBufferList* );

    static OSStatus processOutput ( void*                       inRefCon,
                                    AudioUnitRenderActionFlags*,
                                    const AudioTimeStamp*,
                                    UInt32,
                                    UInt32,
                                    AudioBufferList*            ioData );

    AudioStreamBasicDescription streamFormat;

    AURenderCallbackStruct      inputCallbackStruct;
    AURenderCallbackStruct      outputCallbackStruct;

    ComponentInstance           audioInputUnit;
    AudioDeviceID               audioInputDevice[MAX_NUMBER_SOUND_CARDS];
    ComponentInstance           audioOutputUnit;
    AudioDeviceID               audioOutputDevice[MAX_NUMBER_SOUND_CARDS];

    AudioBufferList*            pBufferList;

    QMutex                      Mutex;
};

#endif // !defined(_SOUND_H__9518A621345F78_363456876UZGSDF82CF549__INCLUDED_)