sound.h

/*
 * sound.h
 *
 * Sound class.
 *
 * 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): ______________________________________.
 *
 * $Log: sound.h,v $
 * Revision 1.15  2005/11/30 12:47:38  csoutheren
 * Removed tabs, reformatted some code, and changed tags for Doxygen
 *
 * Revision 1.14  2003/09/17 05:41:59  csoutheren
 * Removed recursive includes
 *
 * Revision 1.13  2002/09/23 07:17:23  robertj
 * Changes to allow winsock2 to be included.
 *
 * Revision 1.12  2001/10/10 03:28:58  yurik
 * Added open with format other than PCM
 *
 * Revision 1.11  2001/09/10 02:51:23  robertj
 * Major change to fix problem with error codes being corrupted in a
 *   PChannel when have simultaneous reads and writes in threads.
 *
 * Revision 1.10  2001/05/22 12:49:32  robertj
 * Did some seriously wierd rewrite of platform headers to eliminate the
 *   stupid GNU compiler warning about braces not matching.
 *
 * Revision 1.9  2000/05/01 05:59:11  robertj
 * Added mutex to PSoundChannel buffer structure.
 *
 * Revision 1.8  1999/09/23 04:28:43  robertj
 * Allowed some Win32 only access to wave format in sound channel
 *
 * Revision 1.7  1999/05/24 03:02:32  robertj
 * Added include for compiling under different environments.
 *
 * Revision 1.6  1999/02/22 10:15:15  robertj
 * Sound driver interface implementation to Linux OSS specification.
 *
 * Revision 1.5  1999/02/16 06:02:39  robertj
 * Major implementation to Linux OSS model
 *
 * Revision 1.4  1998/11/30 02:55:33  robertj
 * New directory structure
 *
 * Revision 1.3  1998/09/24 03:30:26  robertj
 * Added open software license.
 *
 * Revision 1.2  1996/08/08 10:10:45  robertj
 * Directory structure changes for common files.
 *
 * Revision 1.1  1994/04/12 08:21:52  robertj
 * Initial revision
 *
 */


///////////////////////////////////////////////////////////////////////////////
// PSound

  public:
    // Overrides from class PChannel
    virtual PString GetName() const;
      // Return the name of the channel.

      
    virtual BOOL Read(void * buf, PINDEX len);
      // Low level read from the channel. This function will block until the
      // requested number of characters were read.

    virtual BOOL Write(const void * buf, PINDEX len);
      // Low level write to the channel. This function will block until the
      // requested number of characters were written.

    virtual BOOL Close();
      // Close the channel.


    PString GetErrorText(ErrorGroup group = NumErrorGroups) const;
    // Get a text form of the last error encountered.

    BOOL SetFormat(const PWaveFormat & format);

    BOOL Open(const PString & device, Directions dir,const PWaveFormat & format);
    // Open with format other than PCM

  protected:
    PString     deviceName;
    Directions  direction;
    HWAVEIN     hWaveIn;
    HWAVEOUT    hWaveOut;
    HANDLE      hEventDone;
    PWaveFormat waveFormat;

    PWaveBufferArray buffers;
    PINDEX           bufferIndex;
    PINDEX           bufferByteOffset;
    PMutex           bufferMutex;

  private:
    BOOL OpenDevice(unsigned id);
    BOOL GetDeviceID(const PString & device, Directions dir, unsigned& id);

// End Of File ///////////////////////////////////////////////////////////////