ReactOS 0.4.15-dev-8348-gc1b9bb5
detect.c File Reference
#include "precomp.h"
#include <mment4.h>
#include <mmebuddy_debug.h>
Include dependency graph for detect.c:

Go to the source code of this file.

Functions

MMRESULT EnumerateNt4ServiceSoundDevices (IN LPWSTR ServiceName, IN MMDEVICE_TYPE DeviceType, IN SOUND_DEVICE_DETECTED_PROC SoundDeviceDetectedProc)
 
MMRESULT DetectNt4SoundDevices (IN MMDEVICE_TYPE DeviceType, IN PWSTR BaseDeviceName, IN SOUND_DEVICE_DETECTED_PROC SoundDeviceDetectedProc)
 

Function Documentation

◆ DetectNt4SoundDevices()

MMRESULT DetectNt4SoundDevices ( IN MMDEVICE_TYPE  DeviceType,
IN PWSTR  BaseDeviceName,
IN SOUND_DEVICE_DETECTED_PROC  SoundDeviceDetectedProc 
)

Definition at line 151 of file detect.c.

155{
156 SIZE_T DeviceNameLength = 0;
158 ULONG Index = 0;
160 BOOLEAN DoSearch = TRUE;
161
163
164 DeviceNameLength = wcslen(BaseDeviceName);
165 /* Consider the length of the number */
166 DeviceNameLength += GetDigitCount(Index);
167
168 DeviceName = AllocateWideString(DeviceNameLength);
169
170 if ( ! DeviceName )
171 {
172 return MMSYSERR_NOMEM;
173 }
174
175 while ( DoSearch )
176 {
177 /* Nothing like a nice clean device name */
179 wsprintf(DeviceName, L"%ls%d", BaseDeviceName, Index);
180
182 TRUE,
184 {
185 /* Notify the callback function */
186 SND_TRACE(L"Found device: %wS\n", DeviceName);
187 SoundDeviceDetectedProc(DeviceType, DeviceName);
188
190
191 ++ Index;
192 }
193 else
194 {
195 DoSearch = FALSE;
196 }
197 }
198
200
201 return MMSYSERR_NOERROR;
202}
unsigned char BOOLEAN
static VOID FreeMemory(PCREATE_DATA Data)
Definition: create.c:134
#define NULL
Definition: types.h:112
#define TRUE
Definition: types.h:120
#define FALSE
Definition: types.h:117
#define CloseHandle
Definition: compat.h:739
_Inout_ PUSB_DEVICE_HANDLE DeviceHandle
Definition: hubbusif.h:121
_CRTIMP size_t __cdecl wcslen(_In_z_ const wchar_t *_Str)
DeviceType
Definition: mmdrv.h:42
MMRESULT OpenKernelSoundDeviceByName(IN PWSTR DevicePath, IN BOOLEAN ReadOnly, OUT PHANDLE Handle)
Definition: kernel.c:23
#define VALIDATE_MMSYS_PARAMETER(parameter_condition)
Definition: mmebuddy.h:71
#define AllocateWideString(string_length)
Definition: mmebuddy.h:33
UINT GetDigitCount(IN UINT Number)
Definition: utility.c:68
#define IsValidSoundDeviceType
Definition: mmebuddy.h:69
#define ZeroWideString(string)
Definition: mmebuddy.h:36
#define SND_TRACE(...)
#define MMSYSERR_NOMEM
Definition: mmsystem.h:103
#define MMSYSERR_NOERROR
Definition: mmsystem.h:96
#define L(x)
Definition: ntvdm.h:50
uint16_t * PWSTR
Definition: typedefs.h:56
ULONG_PTR SIZE_T
Definition: typedefs.h:80
uint32_t ULONG
Definition: typedefs.h:59
_In_ WDFCOLLECTION _In_ ULONG Index
_Must_inspect_result_ _In_ PWDFDEVICE_INIT _In_opt_ PCUNICODE_STRING DeviceName
Definition: wdfdevice.h:3275
#define wsprintf
Definition: winuser.h:5874

◆ EnumerateNt4ServiceSoundDevices()

MMRESULT EnumerateNt4ServiceSoundDevices ( IN LPWSTR  ServiceName,
IN MMDEVICE_TYPE  DeviceType,
IN SOUND_DEVICE_DETECTED_PROC  SoundDeviceDetectedProc 
)

Definition at line 26 of file detect.c.

30{
31 HKEY Key;
32 DWORD KeyIndex = 0;
33
35
36 /* Device type zero means "all" */
38 DeviceType == 0 );
39
41 {
42 HKEY DevicesKey;
43 DWORD ValueType = REG_NONE, ValueIndex = 0;
44 DWORD MaxNameLength = 0, ValueNameLength = 0;
45 PWSTR DevicePath = NULL, ValueName = NULL;
46 DWORD ValueDataLength = sizeof(DWORD);
48
49 if ( RegOpenKeyEx(Key,
51 0,
53 &DevicesKey) == ERROR_SUCCESS )
54 {
55 /* Find out how much memory is needed for the key name */
56 if ( RegQueryInfoKey(DevicesKey,
58 &MaxNameLength,
60 {
61 SND_ERR(L"Failed to query registry key information\n");
62 RegCloseKey(DevicesKey);
64
65 return MMSYSERR_ERROR;
66 }
67
68 DevicePath = AllocateWideString(MaxNameLength +
69 strlen("\\\\.\\"));
70
71 /* Check that the memory allocation was successful */
72 if ( ! DevicePath )
73 {
74 /* There's no point in going further */
75 RegCloseKey(DevicesKey);
77
78 return MMSYSERR_NOMEM;
79 }
80
81 /* Insert the device path prefix */
82 wsprintf(DevicePath, L"\\\\.\\");
83
84 /* The offset of the string following this prefix */
85 ValueName = DevicePath + strlen("\\\\.\\");
86
87 /* Copy this so that it may be overwritten - include NULL */
88 ValueNameLength = MaxNameLength + sizeof(WCHAR);
89
90 SND_TRACE(L"Interested in devices beginning with %wS\n", DevicePath);
91
92 while ( RegEnumValue(DevicesKey,
93 ValueIndex,
95 &ValueNameLength,
96 NULL,
97 &ValueType,
99 &ValueDataLength) == ERROR_SUCCESS )
100 {
101 /* Device types are stored as DWORDs */
102 if ( ( ValueType == REG_DWORD ) &&
103 ( ValueDataLength == sizeof(DWORD) ) )
104 {
105 if ( ( DeviceType == 0 ) ||
106 ( DeviceType == ValueData ) )
107 {
108 SND_TRACE(L"Found device: %wS\n", DevicePath);
109 SoundDeviceDetectedProc(ValueData, DevicePath);
110 }
111 }
112
113 /* Reset variables for the next iteration */
114 ValueNameLength = MaxNameLength + sizeof(WCHAR);
115 ZeroMemory(ValueName, (MaxNameLength+1)*sizeof(WCHAR));
116 /*ZeroWideString(ValueName);*/
117 ValueDataLength = sizeof(DWORD);
118 ValueData = 0;
120
121 ++ ValueIndex;
122 }
123
124 FreeMemory(DevicePath);
125
126 RegCloseKey(DevicesKey);
127 }
128 else
129 {
130 SND_WARN(L"Unable to open the Devices key!\n");
131 }
132
133 ++ KeyIndex;
134
136 }
137
138 return MMSYSERR_NOERROR;
139}
ACPI_SIZE strlen(const char *String)
Definition: utclib.c:269
static WCHAR ServiceName[]
Definition: browser.c:19
#define RegCloseKey(hKey)
Definition: registry.h:49
#define ERROR_SUCCESS
Definition: deptool.c:10
unsigned long DWORD
Definition: ntddk_ex.h:95
_In_ GUID _In_ PVOID ValueData
Definition: hubbusif.h:312
#define SND_ERR(...)
#define SND_WARN(...)
MMRESULT OpenSoundDeviceRegKey(IN LPWSTR ServiceName, IN DWORD DeviceIndex, OUT PHKEY KeyHandle)
Definition: registry.c:73
#define MMSYSERR_ERROR
Definition: mmsystem.h:97
#define KEY_READ
Definition: nt_native.h:1023
#define DWORD
Definition: nt_native.h:44
#define REG_NONE
Definition: nt_native.h:1492
#define REG_DWORD
Definition: sdbapi.c:596
#define REG_DEVICES_KEY_NAME_U
Definition: sndnames.h:78
unsigned char * LPBYTE
Definition: typedefs.h:53
_Must_inspect_result_ _In_ WDFKEY _In_ PCUNICODE_STRING _In_ ULONG _Out_opt_ PULONG _Out_opt_ PULONG ValueType
Definition: wdfregistry.h:282
_Must_inspect_result_ _In_ WDFKEY _In_ PCUNICODE_STRING ValueName
Definition: wdfregistry.h:243
#define ZeroMemory
Definition: winbase.h:1712
#define RegOpenKeyEx
Definition: winreg.h:520
#define RegEnumValue
Definition: winreg.h:511
#define RegQueryInfoKey
Definition: winreg.h:521
__wchar_t WCHAR
Definition: xmlstorage.h:180

Referenced by DriverProc().