wavemain.h

smdk2440A的WINCE5.0的BSP

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this source code is subject to the terms of the Microsoft 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 LICENSE.RTF on your
// install media.
//
#pragma once
// -----------------------------------------------------------------------------
//
//      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.
//
// -----------------------------------------------------------------------------

#include <windows.h>
#include <types.h>
#include <memory.h>
#include <string.h>
#include <nkintr.h>
#include <excpt.h>
#include <wavedbg.h>
#include <wavedev.h>
#include <waveddsi.h>
#include <mmddk.h>
#include <cardserv.h>
#include <devload.h>

#include <linklist.h>
#include <audiosys.h>
#include <wfmtmidi.h>

#include <pm.h>
class StreamContext;
class WaveStreamContext;
class InputStreamContext;
class OutputStreamContext;
class DeviceContext;
class MixerDeviceContext;
class InputDeviceContext;
class OutputDeviceContext;
class HardwareContext;

/*
Making the driver pageable:
To make the entire driver pageable, set the following flag in the driver's registry key:

[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\Audio]
    "Flags"=dword:2    <-- Add this

If performance issues in the IST thread are encountered due to paging, it is possible to make portions of the driver
pagelocked while the remainder of the driver remains pageable:

The following pragma defines a section called "PageLocked" which is set to non-pageable.

#pragma comment(linker, "/SECTION:PageLocked,ER!P")

In the source code, to make a section of code nonpageable, put the following line before the code:

#pragma code_seg("PageLocked")

Afterward, you may use the following line to force following code to be placed back in the default
text section:

#pragma code_seg()

Note that there may still be some performance issues if the IST is blocked on a critical section held by other driver
code which is itself pageable. If this is a problem, it's probably easiest to leave the entire driver as unpageable.

FWIW, the wave driver is generally fairly small, so the advantage of making it pageable is minimal.
*/

#include "wavepdd.h"
#include "devctxt.h"
#include "hwctxt.h"
#include "strmctxt.h"
#include "midistrm.h"
#include "mixerdrv.h"