codecinterface.h

EP931X系列的WinCE声卡驱动源代码

//**********************************************************************
//                                                                      
// Filename: codecinterface.h
//                                                                      
// Description: Codec Base Class
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Use of this source code is subject to the terms of the Cirrus end-user
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
// If you did not accept the terms of the EULA, you are not authorized to 
// use this source code. For a copy of the EULA, please see the 
// EULA.RTF on your install media.
//
// Copyright(c) Cirrus Logic Corporation 2002, All Rights Reserved                       
//                                                                      
//**********************************************************************

#ifndef _H_CODEC_INTERFACE
#define _H_CODEC_INTERFACE



class CodecInterface
{
    public:
        CodecInterface(void):m_bPlaybackOpened(FALSE), m_bRecordOpened(FALSE){};
        virtual MMRESULT Initialize(void ) = 0;

        virtual MMRESULT    SetVolume
        (
            ULONG ulRightVolume, 
            ULONG ulLeftVolume, 
            ULONG ulChannel
        ) = 0;

        virtual MMRESULT    SetRecordSampleRate(ULONG ulFrequency, ULONG ulChannel) = 0;
        virtual MMRESULT    SetPlaybackSampleRate(ULONG ulFrequency, ULONG ulChannel) = 0;
        virtual BOOL        HasSRC(void) = 0;
        virtual MMRESULT    StartRecord(ULONG ulChannel)                = 0;
        virtual MMRESULT    StartPlayback(ULONG ulChannel)              = 0;
        virtual MMRESULT    StopPlayback(ULONG ulChannel)               = 0;
        virtual MMRESULT    StopRecord(ULONG ulChannel)                 = 0;
        virtual ULONG       GetDmaPort(void)                            = 0;
        virtual ULONG       DmaSampleSize(void)                         = 0;
        virtual ~CodecInterface(void) = 0 {} ;
        BOOL    m_bPlaybackOpened;
        BOOL    m_bRecordOpened;
};

#endif // _H_CODEC_INTERFACE