wavemain.cpp

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// -----------------------------------------------------------------------------
//
//      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)
{
    if ( dwReason==DLL_PROCESS_ATTACH )
    {
        DEBUGREGISTER((HMODULE)hDLL);
    }
	
    return TRUE;
}
// -----------------------------------------------------------------------------
DWORD WAV_Init(DWORD Index)
{
    return (DWORD)HardwareContext::CreateHWContext(Index);
}


// -----------------------------------------------------------------------------
BOOL WAV_Deinit(DWORD dwData)
{
    return g_pHWContext->Deinit();
}


// -----------------------------------------------------------------------------
DWORD WAV_Open( DWORD dwData,
			   DWORD dwAccess,
			   DWORD dwShareMode)
{
    return 4;
}
// -----------------------------------------------------------------------------
BOOL WAV_Close(DWORD dwData)
{
    return TRUE;
}

// -----------------------------------------------------------------------------
DWORD WAV_Read(DWORD dwData,
               LPVOID pBuf,
               DWORD Len)
{
    // Return length read
    return 0;
}
// -----------------------------------------------------------------------------
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)
    {
    case WODM_GETNUMDEVS:
        {
            dwRet = g_pHWContext->GetNumOutputDevices();
            break;
        }
		
    case WIDM_GETNUMDEVS:
        {
            dwRet = g_pHWContext->GetNumInputDevices();
            break;
        }
		
    case WODM_GETDEVCAPS:
        {
            DeviceContext *pDeviceContext;
            UINT NumDevs = g_pHWContext->GetNumOutputDevices();
			
            if (pStreamContext)
            {
                pDeviceContext=pStreamContext->GetDeviceContext();
            }
            else
            {
                pDeviceContext = g_pHWContext->GetOutputDeviceContext(uDeviceId);
            }
			
            dwRet = pDeviceContext->GetDevCaps((PVOID)dwParam1,dwParam2);
            break;
        }
		
		
    case WIDM_GETDEVCAPS:
        {
            DeviceContext *pDeviceContext;
            UINT NumDevs = g_pHWContext->GetNumInputDevices();
			
            if (pStreamContext)
            {
                pDeviceContext=pStreamContext->GetDeviceContext();
            }
            else
            {
                pDeviceContext = g_pHWContext->GetInputDeviceContext(uDeviceId);
            }
			
            dwRet = pDeviceContext->GetDevCaps((PVOID)dwParam1,dwParam2);
            break;
        }
		
    case WODM_GETEXTDEVCAPS:
        {
            DeviceContext *pDeviceContext;
            UINT NumDevs = g_pHWContext->GetNumOutputDevices();
			
            if (pStreamContext)
            {
                pDeviceContext=pStreamContext->GetDeviceContext();
            }
            else
            {
                pDeviceContext = g_pHWContext->GetOutputDeviceContext(uDeviceId);
            }
			
            dwRet = pDeviceContext->GetExtDevCaps((PVOID)dwParam1,dwParam2);
            break;
        }
		
    case WODM_OPEN:
        {
            // DEBUGMSG(1, (TEXT("WODM_OPEN\r\n"));
            DeviceContext *pDeviceContext = g_pHWContext->GetOutputDeviceContext(uDeviceId);
            dwRet = pDeviceContext->OpenStream((LPWAVEOPENDESC)dwParam1, dwParam2, (StreamContext **)dwUser);
            break;
        }
		
    case WIDM_OPEN:
        {
            // DEBUGMSG(1, (TEXT("WIDM_OPEN\r\n"));
            DeviceContext *pDeviceContext = g_pHWContext->GetInputDeviceContext(uDeviceId);
            dwRet = pDeviceContext->OpenStream((LPWAVEOPENDESC)dwParam1, dwParam2, (StreamContext **)dwUser);
            break;
        }
		
    case WODM_CLOSE:
    case WIDM_CLOSE:
        {
            // DEBUGMSG(1, (TEXT("WIDM_CLOSE/WODM_CLOSE\r\n"));
            dwRet = pStreamContext->Close();
			
            // Release stream context here, rather than inside StreamContext::Close, so that if someone
            // (like CMidiStream) has subclassed Close there's no chance that the object will get released
            // out from under them.
            if (dwRet==MMSYSERR_NOERROR)
            {
                pStreamContext->Release();
            }
            break;
        }
		
    case WODM_RESTART:
    case WIDM_START:
        {
            dwRet = pStreamContext->Run();////
            break;
        }
		
    case WODM_PAUSE:
    case WIDM_STOP:
        {
            dwRet = pStreamContext->Stop();
            break;
        }
		
    case WODM_GETPOS:
    case WIDM_GETPOS:
        {
            dwRet = pStreamContext->GetPos((PMMTIME)dwParam1);
            break;
        }
		
    case WODM_RESET:
    case WIDM_RESET:
        {
            dwRet = pStreamContext->Reset();
            break;
        }
		
    case WODM_WRITE:
    case WIDM_ADDBUFFER:
        {
            // DEBUGMSG(1, (TEXT("WODM_WRITE/WIDM_ADDBUFFER, Buffer=0x%x\r\n"),dwParam1);
            dwRet = pStreamContext->QueueBuffer((LPWAVEHDR)dwParam1);
            break;/////
        }
		
    case WODM_GETVOLUME:
        {
            PULONG pdwGain = (PULONG)dwParam1;
            UINT NumDevs = g_pHWContext->GetNumOutputDevices();
			
            if (pStreamContext)
            {
                *pdwGain = pStreamContext->GetGain();
            }
            else
            {
                DeviceContext *pDeviceContext = g_pHWContext->GetOutputDeviceContext(uDeviceId);
                *pdwGain = pDeviceContext->GetGain();
            }
            dwRet = MMSYSERR_NOERROR;
            break;
        }
		
    case WODM_SETVOLUME:
        {
            UINT NumDevs = g_pHWContext->GetNumOutputDevices();
            LONG dwGain = dwParam1;
            if (pStreamContext)
            {
                dwRet = pStreamContext->SetGain(dwGain);
            }
            else
            {
                DeviceContext *pDeviceContext = g_pHWContext->GetOutputDeviceContext(uDeviceId);
                dwRet = pDeviceContext->SetGain(dwGain);
            }
            break;
        }
		
    case WODM_BREAKLOOP:
        {
            dwRet = pStreamContext->BreakLoop();
            break;
        }
		
    case WODM_SETPLAYBACKRATE:
        {
            WaveStreamContext *pWaveStream = (WaveStreamContext *)dwUser;
            dwRet = pWaveStream->SetRate(dwParam1);
            break;
        }
		
    case WODM_GETPLAYBACKRATE:
        {
            WaveStreamContext *pWaveStream = (WaveStreamContext *)dwUser;
            dwRet = pWaveStream->GetRate((DWORD *)dwParam1);
            break;
        }
		
    case MM_WOM_SETSECONDARYGAINCLASS:
        {
            dwRet = pStreamContext->SetSecondaryGainClass(dwParam1);
            break;
        }
		
    case MM_WOM_SETSECONDARYGAINLIMIT:
        {
            DeviceContext *pDeviceContext;
            if (pStreamContext)
            {
                pDeviceContext = pStreamContext->GetDeviceContext();
            }
            else
            {
                pDeviceContext = g_pHWContext->GetOutputDeviceContext(uDeviceId);
            }
            dwRet = pDeviceContext->SetSecondaryGainLimit(dwParam1,dwParam2);
            break;
        }
		
    case MM_MOM_MIDIMESSAGE:
        {
            CMidiStream *pMidiStream = (CMidiStream *)dwUser;
            dwRet = pMidiStream->MidiMessage(dwParam1);
            break;
        }
    case WODM_GETPITCH:
    case WODM_SETPITCH:
    case WODM_PREPARE:
    case WODM_UNPREPARE:
    case WIDM_PREPARE:
    case WIDM_UNPREPARE:
	default:
        dwRet  = MMSYSERR_NOTSUPPORTED;
    }
    g_pHWContext->Unlock();
	
    // Pass the return code back via pBufOut
    if (pdwResult)
    {
        *pdwResult = dwRet;
    }
	
    return TRUE;
}


// -----------------------------------------------------------------------------
BOOL WAV_IOControl(DWORD  dwOpenData,
                   DWORD  dwCode,
                   PBYTE  pBufIn,
                   DWORD  dwLenIn,
                   PBYTE  pBufOut,
                   DWORD  dwLenOut,
                   PDWORD pdwActualOut)
{
    _try
    {
        switch (dwCode)
        {
        case IOCTL_WAV_MESSAGE:
            return HandleWaveMessage((PMMDRV_MESSAGE_PARAMS)pBufIn, (DWORD *)pBufOut);
        default:
            return g_pHWContext->IOControl(dwOpenData, dwCode, pBufIn, dwLenIn, pBufOut, dwLenOut, pdwActualOut);
        }
    }
    _except (GetExceptionCode() == STATUS_ACCESS_VIOLATION ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH)
    {
        RETAILMSG(1, (TEXT("EXCEPTION IN WAV_IOControl!!!!\r\n")));
        SetLastError(E_FAIL);
    }
	
    return FALSE;
}