beaudio.h

安装 H323需要的pwlib库

/*
 * beaudio.h
 *
 * BeOS Sound driver class definitions.
 *
 * Portable Windows Library
 *
 * Copyright (c) 1993-1998 Equivalence Pty. Ltd.
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is Portable Windows Library.
 *
 * The Initial Developer of the Original Code is Equivalence Pty. Ltd.
 *
 * Portions are Copyright (C) 1993 Free Software Foundation, Inc.
 * All Rights Reserved.
 *
 * Contributor(s): 
 * Yuri Kiryanov, ykiryanov at users.sourceforge.net
 * Bits by Jac Goudsmit
 *
 * $Log: beaudio.h,v $
 * Revision 1.4  2004/10/26 18:07:36  ykiryanov
 * Added ifdef for Zeta build
 *
 * Revision 1.3  2004/06/16 01:57:57  ykiryanov
 * Working capture code
 *
 * Revision 1.2  2004/05/30 04:55:57  ykiryanov
 * Added include files
 *
 * Revision 1.1  2004/05/14 08:36:44  ykiryanov
 * BeOS sound class declarations collected in separate file
 *
 *
 */

#include <ptlib.h>
#include <ptlib/dynalink.h>
#include <ptlib/sound.h>
#include <ptlib/socket.h>
#include <ptlib/plugin.h>


// Storage kit
#include <storage/Directory.h>
#include <storage/Entry.h>
#include <storage/File.h>

// Media kit 
#include <media/MediaDefs.h>
#include <media/MediaFormats.h>
#include <media/MediaFile.h>
#include <media/MediaTrack.h>
#include <media/SoundPlayer.h>
#include <media/PlaySound.h>

// Kernel kit
#include <kernel/OS.h>

// Beep kit :-)
#include <support/Beep.h>

#include "resampler.h"

#ifdef B_ZETA_VERSION
#define MEDIA_KIT_UPDATE
#endif

#ifdef MEDIA_KIT_UPDATE
#include <media/MediaRecorder.h>
#else
#include "beaudio/MediaRecorder.h"
#endif

////////////////////////////////////////////////////////////////////////////////
// PSoundChannelBeOS declaration

class CircularBuffer;

class PSoundChannelBeOS: public PSoundChannel
{
 public:
    PSoundChannelBeOS();
    void Construct();
    PSoundChannelBeOS(const PString &device,
                     PSoundChannel::Directions dir,
                     unsigned numChannels,
                     unsigned sampleRate,
                     unsigned bitsPerSample);
    ~PSoundChannelBeOS();
    static PStringArray GetDeviceNames(PSoundChannel::Directions = Player);
    static PString GetDefaultDevice(PSoundChannel::Directions);
    BOOL Open(const PString & _device,
              Directions _dir,
              unsigned _numChannels,
              unsigned _sampleRate,
              unsigned _bitsPerSample);
    BOOL Setup();
    BOOL Close();
    BOOL IsOpen() const;
    BOOL Write(const void * buf, PINDEX len);
    BOOL Read(void * buf, PINDEX len);
    BOOL SetFormat(unsigned numChannels,
                   unsigned sampleRate,
                   unsigned bitsPerSample);
    unsigned GetChannels() const;
    unsigned GetSampleRate() const;
    unsigned GetSampleSize() const;
    BOOL SetBuffers(PINDEX size, PINDEX count);
    BOOL GetBuffers(PINDEX & size, PINDEX & count);
    BOOL PlaySound(const PSound & sound, BOOL wait);
    BOOL PlayFile(const PFilePath & filename, BOOL wait);
    BOOL HasPlayCompleted();
    BOOL WaitForPlayCompletion();
    BOOL RecordSound(PSound & sound);
    BOOL RecordFile(const PFilePath & filename);
    BOOL StartRecording();
    BOOL IsRecordBufferFull();
    BOOL AreAllRecordBuffersFull();
    BOOL WaitForRecordBufferFull();
    BOOL WaitForAllRecordBuffersFull();
    BOOL Abort();
    BOOL SetVolume(unsigned newVal);
    BOOL GetVolume(unsigned &devVol);

  public:
    // Overrides from class PChannel
    virtual PString GetName() const { return deviceName; }
      // Return the name of the channel.
  protected:
    PString     deviceName;
    Directions  direction;   

  private:
  	// Only one of the following pointers can be non-NULL at a time.
	BMediaRecorder		   *mRecorder;
	BSoundPlayer		   *mPlayer;

	// Raw media format specifier used for sound player.
	// It also stores the parameters (number of channels, sample rate etc) so
	// no need to store them separately here.
	// For the recorder, a media_format struct is created temporarily with
	// the data from this raw format spec.
	media_raw_audio_format	mFormat;

	// The class holds a circular buffer whose size is set with SetBuffers.
	// We only need one buffer for BeOS. The number of buffers that was set
	// is only kept for reference.
	friend class CircularBuffer;
	CircularBuffer *mBuffer;			// The internal buffer
	PINDEX mNumBuffers;		// for reference only!
	
	// Just some helpers so that the Open function doesn't get too big
	BOOL OpenPlayer(void);
	BOOL OpenRecorder(const PString &dev);

	// internal buffer setting function so we can disable the SetBuffers
	// function for debug purposes
	// size is the total size, threshold is the fill/drain threshold on
	// the buffer
	BOOL InternalSetBuffers(PINDEX size, PINDEX threshold);

	// Input resampler
	Resampler			   *mResampler;
};