Leaked source code of windows server 2003
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/*++
Copyright (c) 2000 Microsoft Corporation
Module Name:
WaveOutUsePreferredDevice.cpp
Abstract:
Force the use of the preferred waveOut device (rather than a specific device)
Notes:
This is a general purpose shim.
History:
06/02/1999 robkenny Created
--*/
#include "precomp.h"
IMPLEMENT_SHIM_BEGIN(WaveOutUsePreferredDevice)
#include "ShimHookMacro.h"
APIHOOK_ENUM_BEGIN
APIHOOK_ENUM_ENTRY(waveOutOpen)
APIHOOK_ENUM_ENTRY(waveOutGetDevCapsA)
APIHOOK_ENUM_ENTRY(waveOutGetDevCapsW)
APIHOOK_ENUM_ENTRY(wod32Message)
APIHOOK_ENUM_END
/*+
Call waveOutOpen, saving dwCallback if it is a function.
--*/
MMRESULT APIHOOK(waveOutOpen)(
LPHWAVEOUT phwo,
UINT uDeviceID,
LPWAVEFORMATEX pwfx,
DWORD dwCallback,
DWORD dwCallbackInstance,
DWORD fdwOpen
)
{
MMRESULT returnValue = ORIGINAL_API(waveOutOpen)(phwo, WAVE_MAPPER, pwfx, dwCallback, dwCallbackInstance, fdwOpen);
return returnValue;
}
MMRESULT APIHOOK(waveOutGetDevCapsA)(
UINT uDeviceID,
LPWAVEOUTCAPSA pwoc,
UINT cbwoc)
{
MMRESULT returnValue = ORIGINAL_API(waveOutGetDevCapsA)(WAVE_MAPPER, pwoc, cbwoc);
return returnValue;
}
MMRESULT APIHOOK(waveOutGetDevCapsW)(
UINT uDeviceID,
LPWAVEOUTCAPSW pwoc,
UINT cbwoc)
{
MMRESULT returnValue = ORIGINAL_API(waveOutGetDevCapsW)(WAVE_MAPPER, pwoc, cbwoc);
return returnValue;
}
/*+
Catch the 16 bit applications, WOW calls this routine for 16 bit apps.
--*/
#define WODM_GETDEVCAPS 4
#define WODM_OPEN 5
DWORD APIHOOK(wod32Message)(
UINT uDeviceID,
UINT uMessage,
DWORD dwInstance,
DWORD dwParam1,
DWORD dwParam2
)
{
// Change device 0 to WAVE_MAPPER for Open and GetDevCaps
if (uDeviceID == 0) {
if (uMessage == WODM_OPEN ||
uMessage == WODM_GETDEVCAPS) {
uDeviceID = -1; // Force device to WAVE_MAPPER
}
}
MMRESULT returnValue = ORIGINAL_API(wod32Message)(uDeviceID, uMessage, dwInstance, dwParam1, dwParam2);
return returnValue;
}
/*++
Register hooked functions
--*/
HOOK_BEGIN
APIHOOK_ENTRY(WINMM.DLL, waveOutOpen)
APIHOOK_ENTRY(WINMM.DLL, waveOutGetDevCapsA)
APIHOOK_ENTRY(WINMM.DLL, waveOutGetDevCapsW)
APIHOOK_ENTRY(WINMM.DLL, wod32Message)
HOOK_END
IMPLEMENT_SHIM_END