wavemain.cpp

SBC2410 WinCE 5.0 BSP.绝大多数驱动已经调通。

// -----------------------------------------------------------------------------
//
//      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.
//      Copyright (c) 1995-2000 Microsoft Corporation.  All rights reserved.
//
// -----------------------------------------------------------------------------
#include "wavemain.h"

BOOL CALLBACK DllMain(HANDLE hDLL,
                      DWORD dwReason,
                      LPVOID lpvReserved)
{
    return(TRUE);
}


// -----------------------------------------------------------------------------
//
// @doc     WDEV_EXT
//
// @topic   WAV Device Interface | Implements the WAVEDEV.DLL device
//          interface. These functions are required for the device to
//          be loaded by DEVICE.EXE.
//
// @xref                          <nl>
//          <f WAV_Init>,         <nl>
//          <f WAV_Deinit>,       <nl>
//          <f WAV_Open>,         <nl>
//          <f WAV_Close>,        <nl>
//          <f WAV_Read>,         <nl>
//          <f WAV_Write>,        <nl>
//          <f WAV_Seek>,         <nl>
//          <f WAV_PowerUp>,      <nl>
//          <f WAV_PowerDown>,    <nl>
//          <f WAV_IOControl>     <nl>
//
// -----------------------------------------------------------------------------
//
// @doc     WDEV_EXT
//
// @topic   Designing a Waveform Audio Driver |
//          A waveform audio driver is responsible for processing messages
//          from the Wave API Manager (WAVEAPI.DLL) to playback and record
//          waveform audio. Waveform audio drivers are implemented as
//          dynamic link libraries that are loaded by DEVICE.EXE The
//          default waveform audio driver is named WAVEDEV.DLL (see figure).
//          The messages passed to the audio driver are similar to those
//          passed to a user-mode Windows NT audio driver (such as mmdrv.dll).
//
//          <bmp blk1_bmp>
//
//          Like all device drivers loaded by DEVICE.EXE, the waveform
//          audio driver must export the standard device functions,
//          XXX_Init, XXX_Deinit, XXX_IoControl, etc (see
//          <t WAV Device Interface>). The Waveform Audio Drivers
//          have a device prefix of "WAV".
//
//          Driver loading and unloading is handled by DEVICE.EXE and
//          WAVEAPI.DLL. Calls are made to <f WAV_Init> and <f WAV_Deinit>.
//          When the driver is opened by WAVEAPI.DLL calls are made to
//          <f WAV_Open> and <f WAV_Close>.  On system power up and power down
//          calls are made to <f WAV_PowerUp> and <f WAV_PowerDown>. All
//          other communication between WAVEAPI.DLL and WAVEDEV.DLL is
//          done by calls to <f WAV_IOControl>. The other WAV_xxx functions
//          are not used.
//
// @xref                                          <nl>
//          <t Designing a Waveform Audio PDD>    <nl>
//          <t WAV Device Interface>              <nl>
//          <t Wave Input Driver Messages>        <nl>
//          <t Wave Output Driver Messages>       <nl>
//
// -----------------------------------------------------------------------------

// -----------------------------------------------------------------------------
//
//  @doc    WDEV_EXT
//
//  @func   PVOID | WAV_Init | Device initialization routine
//
//  @parm   DWORD | dwInfo | info passed to RegisterDevice
//
//  @rdesc  Returns a DWORD which will be passed to Open & Deinit or NULL if
//          unable to initialize the device.
//
// -----------------------------------------------------------------------------
DWORD WAV_Init(DWORD Index)
{
    return((DWORD)HardwareContext::CreateHWContext(Index));
}

// -----------------------------------------------------------------------------
//
//  @doc    WDEV_EXT
//
//  @func   PVOID | WAV_Deinit | Device deinitialization routine
//
//  @parm   DWORD | dwData | value returned from WAV_Init call
//
//  @rdesc  Returns TRUE for success, FALSE for failure.
//
// -----------------------------------------------------------------------------
BOOL WAV_Deinit(DWORD dwData)
{
    return(g_pHWContext->Deinit());
}

// -----------------------------------------------------------------------------
//
//  @doc    WDEV_EXT
//
//  @func   PVOID | WAV_Open    | Device open routine
//
//  @parm   DWORD | dwData      | Value returned from WAV_Init call (ignored)
//
//  @parm   DWORD | dwAccess    | Requested access (combination of GENERIC_READ
//                                and GENERIC_WRITE) (ignored)
//
//  @parm   DWORD | dwShareMode | Requested share mode (combination of
//                                FILE_SHARE_READ and FILE_SHARE_WRITE) (ignored)
//
//  @rdesc  Returns a DWORD which will be passed to Read, Write, etc or NULL if
//          unable to open device.
//
// -----------------------------------------------------------------------------
DWORD WAV_Open( DWORD dwData,
              DWORD dwAccess,
              DWORD dwShareMode)
{
    return(4);
}

// -----------------------------------------------------------------------------
//
//  @doc    WDEV_EXT
//
//  @func   BOOL | WAV_Close | Device close routine
//
//  @parm   DWORD | dwOpenData | Value returned from WAV_Open call
//
//  @rdesc  Returns TRUE for success, FALSE for failure
//
// -----------------------------------------------------------------------------
BOOL WAV_Close(DWORD dwData)
{
    return(TRUE);
}

// -----------------------------------------------------------------------------
//
//  @doc    WDEV_EXT
//
//  @func   DWORD | WAV_Read | Device read routine
//
//  @parm   DWORD | dwOpenData | Value returned from WAV_Open call (ignored)
//
//  @parm   LPVOID | pBuf | Buffer to receive data (ignored)
//
//  @parm   DWORD | len | Maximum length to read (ignored)
//
//  @rdesc  Returns 0 always. WAV_Read should never get called and does
//          nothing. Required DEVICE.EXE function, but all data communication
//          is handled by <f WAV_IOControl>.
//
// -----------------------------------------------------------------------------
DWORD WAV_Read(DWORD dwData,
               LPVOID pBuf,
               DWORD Len)
{
    // Return length read
    return(0);
}

// -----------------------------------------------------------------------------
//
//  @doc    WDEV_EXT
//
//  @func   DWORD | WAV_Write | Device write routine
//
//  @parm   DWORD | dwOpenData | Value returned from WAV_Open call (ignored)
//
//  @parm   LPCVOID | pBuf | Buffer containing data (ignored)
//
//  @parm   DWORD | len | Maximum length to write (ignored)
//
//  @rdesc  Returns 0 always. WAV_Write should never get called and does
//          nothing. Required DEVICE.EXE function, but all data communication
//          is handled by <f WAV_IOControl>.
//
// -----------------------------------------------------------------------------
DWORD WAV_Write(DWORD dwData,
                LPCVOID pBuf,
                DWORD Len)
{
    // return number of bytes written (or -1 for error)
    return(0);
}

// -----------------------------------------------------------------------------
//
//  @doc    WDEV_EXT
//
//  @func   DWORD | WAV_Seek | Device seek routine
//
//  @parm   DWORD | dwOpenData | Value returned from WAV_Open call (ignored)
//
//  @parm   long | pos | Position to seek to (relative to type) (ignored)
//
//  @parm   DWORD | type | FILE_BEGIN, FILE_CURRENT, or FILE_END (ignored)
//
//  @rdesc  Returns -1 always. WAV_Seek should never get called and does
//          nothing. Required DEVICE.EXE function, but all data communication
//          is handled by <f WAV_IOControl>.
//
// -----------------------------------------------------------------------------
DWORD WAV_Seek(DWORD dwData,
               long pos,
               DWORD type)
{
    // return an error
    return((DWORD)-1);
}

// -----------------------------------------------------------------------------
//
//  @doc    WDEV_EXT
//
//  @func   void | WAV_PowerUp | Device powerup routine
//
//  @comm   Called to restore device from suspend mode.  Cannot call any
//          routines aside from those in the dll in this call.
//
// -----------------------------------------------------------------------------
VOID WAV_PowerUp(VOID)
{
    g_pHWContext->PowerUp();
    return;
}

// -----------------------------------------------------------------------------
//
//  @doc    WDEV_EXT
//
//  @func   void | WAV_PowerDown | Device powerdown routine
//
//  @comm   Called to suspend device.  Cannot call any routines aside from
//          those in the dll in this call.
//
// -----------------------------------------------------------------------------
VOID WAV_PowerDown(VOID)
{
    g_pHWContext->PowerDown();
    return;
}


BOOL HandleWaveMessage(PMMDRV_MESSAGE_PARAMS pParams, DWORD *pdwResult)
{
    //  set the error code to be no error first
    SetLastError(MMSYSERR_NOERROR);

    UINT uMsg = pParams->uMsg;
    UINT uDeviceId = pParams->uDeviceId;
    DWORD dwParam1 = pParams->dwParam1;
    DWORD dwParam2 = pParams->dwParam2;
    DWORD dwUser   = pParams->dwUser;
    StreamContext *pStreamContext = (StreamContext *)dwUser;

    DWORD dwRet;

    g_pHWContext->Lock();
    switch (uMsg)