+++ /dev/null
-/*
- * PROJECT: ReactOS Sound System "MME Buddy" NT4 Library
- * LICENSE: GPL - See COPYING in the top level directory
- * FILE: lib/drivers/sound/mment4/detect.c
- *
- * PURPOSE: Assists in locating Windows NT4 compatible sound devices,
- * which mostly use the same device naming convention and/or
- * store their created device names within their service key
- * within the registry.
- *
- * PROGRAMMERS: Andrew Greenwood (silverblade@reactos.org)
-*/
-
-#include "precomp.h"
-
-#include <mment4.h>
-#include <mmebuddy_debug.h>
-
-/*
- This is the "nice" way to discover audio devices in NT4 - go into the
- service registry key and enumerate the Parameters\Device*\Devices
- values. The value names represent the device name, whereas the data
- assigned to them identifies the type of device.
-*/
-MMRESULT
-EnumerateNt4ServiceSoundDevices(
- IN LPWSTR ServiceName,
- IN MMDEVICE_TYPE DeviceType,
- IN SOUND_DEVICE_DETECTED_PROC SoundDeviceDetectedProc)
-{
- HKEY Key;
- DWORD KeyIndex = 0;
-
- VALIDATE_MMSYS_PARAMETER( ServiceName );
-
- /* Device type zero means "all" */
- VALIDATE_MMSYS_PARAMETER( IsValidSoundDeviceType(DeviceType) ||
- DeviceType == 0 );
-
- while ( OpenSoundDeviceRegKey(ServiceName, KeyIndex, &Key) == MMSYSERR_NOERROR )
- {
- HKEY DevicesKey;
- DWORD ValueType = REG_NONE, ValueIndex = 0;
- DWORD MaxNameLength = 0, ValueNameLength = 0;
- PWSTR DevicePath = NULL, ValueName = NULL;
- DWORD ValueDataLength = sizeof(DWORD);
- DWORD ValueData;
-
- if ( RegOpenKeyEx(Key,
- REG_DEVICES_KEY_NAME_U,
- 0,
- KEY_READ,
- &DevicesKey) == ERROR_SUCCESS )
- {
- /* Find out how much memory is needed for the key name */
- if ( RegQueryInfoKey(DevicesKey,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- &MaxNameLength,
- NULL, NULL, NULL) != ERROR_SUCCESS )
- {
- SND_ERR(L"Failed to query registry key information\n");
- RegCloseKey(DevicesKey);
- RegCloseKey(Key);
-
- return MMSYSERR_ERROR;
- }
-
- DevicePath = AllocateWideString(MaxNameLength +
- strlen("\\\\.\\"));
-
- /* Check that the memory allocation was successful */
- if ( ! DevicePath )
- {
- /* There's no point in going further */
- RegCloseKey(DevicesKey);
- RegCloseKey(Key);
-
- return MMSYSERR_NOMEM;
- }
-
- /* Insert the device path prefix */
- wsprintf(DevicePath, L"\\\\.\\");
-
- /* The offset of the string following this prefix */
- ValueName = DevicePath + strlen("\\\\.\\");
-
- /* Copy this so that it may be overwritten - include NULL */
- ValueNameLength = MaxNameLength + sizeof(WCHAR);
-
- SND_TRACE(L"Interested in devices beginning with %wS\n", DevicePath);
-
- while ( RegEnumValue(DevicesKey,
- ValueIndex,
- ValueName,
- &ValueNameLength,
- NULL,
- &ValueType,
- (LPBYTE) &ValueData,
- &ValueDataLength) == ERROR_SUCCESS )
- {
- /* Device types are stored as DWORDs */
- if ( ( ValueType == REG_DWORD ) &&
- ( ValueDataLength == sizeof(DWORD) ) )
- {
- if ( ( DeviceType == 0 ) ||
- ( DeviceType == ValueData ) )
- {
- SND_TRACE(L"Found device: %wS\n", DevicePath);
- SoundDeviceDetectedProc(ValueData, DevicePath);
- }
- }
-
- /* Reset variables for the next iteration */
- ValueNameLength = MaxNameLength + sizeof(WCHAR);
- ZeroMemory(ValueName, (MaxNameLength+1)*sizeof(WCHAR));
- /*ZeroWideString(ValueName);*/
- ValueDataLength = sizeof(DWORD);
- ValueData = 0;
- ValueType = REG_NONE;
-
- ++ ValueIndex;
- }
-
- FreeMemory(DevicePath);
-
- RegCloseKey(DevicesKey);
- }
- else
- {
- SND_WARN(L"Unable to open the Devices key!\n");
- }
-
- ++ KeyIndex;
-
- RegCloseKey(Key);
- }
-
- return MMSYSERR_NOERROR;
-}
-
-/*
- Brute-force device detection, using a base device name (eg: \\.\WaveOut).
-
- This will add the device number as a suffix to the end of the string and
- attempt to open the device based on that name. On success, it will
- increment the device number and repeat this process.
-
- When it runs out of devices, it will give up.
-*/
-MMRESULT
-DetectNt4SoundDevices(
- IN MMDEVICE_TYPE DeviceType,
- IN PWSTR BaseDeviceName,
- IN SOUND_DEVICE_DETECTED_PROC SoundDeviceDetectedProc)
-{
- ULONG DeviceNameLength = 0;
- PWSTR DeviceName = NULL;
- ULONG Index = 0;
- HANDLE DeviceHandle;
- BOOLEAN DoSearch = TRUE;
-
- VALIDATE_MMSYS_PARAMETER( IsValidSoundDeviceType(DeviceType) );
-
- DeviceNameLength = wcslen(BaseDeviceName);
- /* Consider the length of the number */
- DeviceNameLength += GetDigitCount(Index);
-
- DeviceName = AllocateWideString(DeviceNameLength);
-
- if ( ! DeviceName )
- {
- return MMSYSERR_NOMEM;
- }
-
- while ( DoSearch )
- {
- /* Nothing like a nice clean device name */
- ZeroWideString(DeviceName);
- wsprintf(DeviceName, L"%ls%d", BaseDeviceName, Index);
-
- if ( OpenKernelSoundDeviceByName(DeviceName,
- TRUE,
- &DeviceHandle) == MMSYSERR_NOERROR )
- {
- /* Notify the callback function */
- SND_TRACE(L"Found device: %wS\n", DeviceName);
- SoundDeviceDetectedProc(DeviceType, DeviceName);
-
- CloseHandle(DeviceHandle);
-
- ++ Index;
- }
- else
- {
- DoSearch = FALSE;
- }
- }
-
- FreeMemory(DeviceName);
-
- return MMSYSERR_NOERROR;
-}
projects / reactos.git / blobdiff