/* -*-c++-*- */
/**
 * OsgAL - OpenSceneGraph Audio Library
 * Copyright (C) 2004 VRlab, Ume University
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */

#ifndef DEVICEUPDATER_H_INCLUDED_C419EA9C
#define DEVICEUPDATER_H_INCLUDED_C419EA9C


#include "openalpp/StreamUpdater"
#include "openalpp/Error"
#include "openalpp/Export"


namespace openalpp {

/**
 * Updater for sound input devices (like microphones).
 */
class  DeviceUpdater : public StreamUpdater {
  
  OpenThreads::Mutex inputmutex_;
  
  char *tmpBuffer_;
  int tmpBufSize_, maxtmpbufsize_;
  unsigned int totalDataSize_;
  int blockAlign_;
	ALCdevice		*pCaptureDevice_;
	bool done_;

 public:
  /**
   * Constructor.
   * @param device is the number of the device (as PortAudio reports it).
   * TODO: Change this to something non-portaudio dependant.
   * @param frequency is the desired recording frequency.
   * @param buffersize is the desired buffersize.
   * @param format is the format of the sound.
   * @param buffer1 and..
   * @param buffer2 are the (OpenAL) buffers to use.
   */
  OPENALPP_API DeviceUpdater(int device, unsigned int frequency,unsigned int buffersize,
		SampleFormat format,
		ALuint buffer1,ALuint buffer2);

  /**
   * Destructor.
   */
  OPENALPP_API ~DeviceUpdater();

  /**
   * Inherited from Thread.
   * This will be called when the updater is Start():ed..
   */
  OPENALPP_API void run();

  /**
   * Enter critical section.
   */
  OPENALPP_API inline void enter() {inputmutex_.lock();}

  /**
   * Leave critical section.
   */
  OPENALPP_API inline void leave() {inputmutex_.unlock();}

  /**
   * Copy input from callback to temporary buffer.
   * Update will copy the data from the temporary buffer to a sound buffer.
   * @param tempbuffer is a pointer to the buffer
   * @param length is the length - in bytes - of the buffer
   */
  OPENALPP_API void CopyInput(void *tempbuffer,int length);
  
  /**
  * Terminates the capturing thread. 
  */
  virtual void stop();
    
};

}

#endif /* DEVICEUPDATER_H_INCLUDED_C419EA9C */
