我有一个键盘没有音乐键,用于在我的电脑中上下音乐,播放,停止等音乐。如果你不明白,this是我的键盘,this不是。如何以编程方式控制我的电脑的音量?
我想在Windows和Delphi或C#中实现一个键盘钩子来在我的键盘上创建音量功能,但是我不知道如何通过代码来调高音量。我试图this和this的例子,但没有工作(顺便提一句,所有在德尔福)。
你知道如何通过代码调高音量吗?
我有一个键盘没有音乐键,用于在我的电脑中上下音乐,播放,停止等音乐。如果你不明白,this是我的键盘,this不是。如何以编程方式控制我的电脑的音量?
我想在Windows和Delphi或C#中实现一个键盘钩子来在我的键盘上创建音量功能,但是我不知道如何通过代码来调高音量。我试图this和this的例子,但没有工作(顺便提一句,所有在德尔福)。
你知道如何通过代码调高音量吗?
Autohotkey会做的伎俩。它有一个“SoundSet”命令,可以调整所有音频设备的音量/静音电平。
它仍然需要一些脚本 - 如果你四处游荡,有人可能已经创建了autohotkey脚本。 – 2010-03-04 01:32:58
不错! '^!NumpadSub :: Send {Volume_Up 10}' '^!NumpadAdd :: Send {Volume_Down 10}' '^!NumpadEnter :: Send {Volume_Mute}' – Joe 2012-10-09 00:26:07
其中一个教程,可以帮助您开始:
Simple waveform volume control in C#
Windows mixer control in C#
Delphi代码如下。
我keyhook将消息发送到我的与密钥的VK代码Lparam型主要形式,
procedure TmainFrm.keyHook(var msg: TMessage);
begin
case msg.LParam of
VK_VOLUME_UP : g_mixer.volume := g_mixer.volume + 2048;
VK_VOLUME_DOWN: g_mixer.volume := g_mixer.volume - 2048;
VK_VOLUME_MUTE: g_mixer.muted := not g_mixer.muted;
end;
end;
体积范围是0 .. 65535;带外值被无声地纠正。
-
unit Mixer;
interface
type
Tmixer = class
protected
function getMute: boolean; virtual; abstract;
function getVolume: integer; virtual; abstract;
procedure setVolume(Value: integer); virtual; abstract;
procedure setMute(Value: boolean); virtual; abstract;
public
property volume: integer read getVolume write setVolume;
property muted: boolean read getMute write setMute;
end;
function g_mixer: Tmixer;
implementation
uses
Windows, MMSystem, MMDevApi_tlb, ComObj, ActiveX, SysUtils;
// ---------------------------------------------------------------------------
type
TxpMixer = class(Tmixer)
private
Fmxct: integer;
Fmixer: HMIXER;
procedure chk(r: MMRESULT);
protected
function getMute: boolean; override;
function getVolume: integer; override;
procedure setVolume(Value: integer); override;
procedure setMute(Value: boolean); override;
public
constructor Create;
destructor Destroy; override;
end;
TvistaMixer = class(Tmixer)
private
FmmDev: IMMDevice;
FmmDevEnum: IMMDeviceEnumerator;
FmmEndpoint: IMMAudioEndpointVolume;
protected
function getMute: boolean; override;
function getVolume: integer; override;
procedure setVolume(Value: integer); override;
procedure setMute(Value: boolean); override;
public
constructor Create;
end;
// ---------------------------------------------------------------------------
var
_g_mixer: Tmixer;
function g_mixer: Tmixer;
var
VerInfo: TOSVersioninfo;
begin
if (_g_mixer = nil) then
begin
VerInfo.dwOSVersionInfoSize := SizeOf(TOSVersionInfo);
GetVersionEx(VerInfo);
if (VerInfo.dwMajorVersion >= 6) then
_g_mixer := TvistaMixer.Create
else
_g_mixer := TxpMixer.Create;
end;
result := _g_mixer;
end;
// ---------------------------------------------------------------------------
{ TxpMixer }
procedure TxpMixer.chk(r: MMRESULT);
var
s: string;
begin
if (r = MMSYSERR_NOERROR) then
exit;
setLength(s, MMSystem.MAXERRORLENGTH + 1);
waveOutGetErrorText(r, @s[1], MMSystem.MAXERRORLENGTH);
raise Exception.Create(StrPas(pChar(s)));
end;
// ---------------------------------------------------------------------------
constructor TxpMixer.Create;
begin
Fmxct := MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
chk(mixerOpen(@Fmixer, 0, 0, 0, 0));
end;
// ---------------------------------------------------------------------------
destructor TxpMixer.Destroy;
begin
if (Fmixer <> 0) then
mixerClose(Fmixer);
inherited;
end;
// ---------------------------------------------------------------------------
function TxpMixer.getMute: boolean;
var
MasterMute: TMixerControl;
Details: TMixerControlDetails;
BoolDetails: TMixerControlDetailsBoolean;
Line: TMixerLine;
Controls: TMixerLineControls;
begin
ZeroMemory(@Line, SizeOf(Line));
Line.cbStruct := SizeOf(Line);
Line.dwComponentType := Fmxct;
chk(mixerGetLineInfo(0, @Line, MIXER_GETLINEINFOF_COMPONENTTYPE));
ZeroMemory(@Controls, SizeOf(Controls));
Controls.cbStruct := SizeOf(Controls);
Controls.dwLineID := Line.dwLineID;
Controls.cControls := 1;
Controls.dwControlType := MIXERCONTROL_CONTROLTYPE_MUTE;
Controls.cbmxctrl := SizeOf(MasterMute);
Controls.pamxctrl := @MasterMute;
chk(mixerGetLineControls(0, @Controls, MIXER_GETLINECONTROLSF_ONEBYTYPE));
Details.cbStruct := SizeOf(Details);
Details.dwControlID := MasterMute.dwControlID;
Details.cChannels := 1;
Details.cMultipleItems := 0;
Details.cbDetails := SizeOf(BoolDetails);
Details.paDetails := @BoolDetails;
chk(mixerGetControlDetails(0, @Details, MIXER_GETCONTROLDETAILSF_VALUE));
result := BoolDetails.fValue <> 0;
end;
// ---------------------------------------------------------------------------
function TxpMixer.getVolume: integer;
var
Line: TMixerLine;
Controls: TMixerLineControls;
MasterVolume: TMixerControl;
Details: TMixerControlDetails;
UnsignedDetails: TMixerControlDetailsUnsigned;
begin
ZeroMemory(@Line, SizeOf(Line));
Line.cbStruct := SizeOf(Line);
Line.dwComponentType := Fmxct;
chk(mixerGetLineInfo(Fmixer, @Line, MIXER_GETLINEINFOF_COMPONENTTYPE));
ZeroMemory(@Controls, SizeOf(Controls));
Controls.cbStruct := SizeOf(Controls);
Controls.dwLineID := Line.dwLineID;
Controls.cControls := 1;
Controls.dwControlType := MIXERCONTROL_CONTROLTYPE_VOLUME;
Controls.cbmxctrl := SizeOf(MasterVolume);
Controls.pamxctrl := @MasterVolume;
chk(mixerGetLineControls(Fmixer, @Controls, MIXER_GETLINECONTROLSF_ONEBYTYPE));
details.cbStruct := SizeOf(Details);
details.dwControlID := MasterVolume.dwControlID;
details.cChannels := 1;
details.cMultipleItems := 0;
details.cbDetails := SizeOf(UnsignedDetails);
details.paDetails := @UnsignedDetails;
chk(mixerGetControlDetails(Fmixer, @Details, MIXER_GETCONTROLDETAILSF_VALUE));
result := UnsignedDetails.dwValue;
end;
// ---------------------------------------------------------------------------
procedure TxpMixer.setMute(Value: boolean);
var
Line: TMixerLine;
Controls: TMixerLineControls;
MasterMute: TMixerControl;
Details: TMixerControlDetails;
BoolDetails: TMixerControlDetailsBoolean;
begin
ZeroMemory(@Line, SizeOf(Line));
Line.cbStruct := SizeOf(Line);
Line.dwComponentType := Fmxct;
chk(mixerGetLineInfo(Fmixer, @Line, MIXER_GETLINEINFOF_COMPONENTTYPE));
ZeroMemory(@Controls, SizeOf(Controls));
Controls.cbStruct := SizeOf(Controls);
Controls.dwLineID := Line.dwLineID;
Controls.cControls := 1;
Controls.dwControlType := MIXERCONTROL_CONTROLTYPE_MUTE;
Controls.cbmxctrl := SizeOf(masterMute);
Controls.pamxctrl := @masterMute;
chk(mixerGetLineControls(Fmixer, @Controls, MIXER_GETLINECONTROLSF_ONEBYTYPE));
details.cbStruct := SizeOf(Details);
details.dwControlID := MasterMute.dwControlID;
details.cChannels := 1;
details.cMultipleItems := 0;
details.cbDetails := SizeOf(BoolDetails);
details.paDetails := @BoolDetails;
mixerGetControlDetails(0, @Details, MIXER_GETCONTROLDETAILSF_VALUE);
if (Value) then
BoolDetails.fValue := 1
else
BoolDetails.fValue := 0;
chk(mixerSetControlDetails(0, @Details, MIXER_SETCONTROLDETAILSF_VALUE));
end;
// ---------------------------------------------------------------------------
procedure TxpMixer.setVolume(Value: integer);
var
Line: TMixerLine;
Controls: TMixerLineControls;
MasterVolume: TMixerControl;
Details: TMixerControlDetails;
UnsignedDetails: TMixerControlDetailsUnsigned;
begin
if (value < 0) then
value := 0;
if (value > 65535) then
value := 65535;
ZeroMemory(@Line, SizeOf(Line));
Line.cbStruct := SizeOf(Line);
Line.dwComponentType := Fmxct;
chk(mixerGetLineInfo(Fmixer, @Line, MIXER_GETLINEINFOF_COMPONENTTYPE));
ZeroMemory(@Controls, SizeOf(Controls));
Controls.cbStruct := SizeOf(Controls);
Controls.dwLineID := Line.dwLineID;
Controls.cControls := 1;
Controls.dwControlType := MIXERCONTROL_CONTROLTYPE_VOLUME;
Controls.cbmxctrl := SizeOf(MasterVolume);
Controls.pamxctrl := @MasterVolume;
chk(mixerGetLineControls(Fmixer, @Controls, MIXER_GETLINECONTROLSF_ONEBYTYPE));
details.cbStruct := SizeOf(Details);
details.dwControlID := MasterVolume.dwControlID;
details.cChannels := 1;
details.cMultipleItems := 0;
details.cbDetails := SizeOf(UnsignedDetails);
details.paDetails := @UnsignedDetails;
UnsignedDetails.dwValue := Value;
chk(mixerSetControlDetails(Fmixer, @Details, MIXER_SETCONTROLDETAILSF_VALUE));
end;
// ---------------------------------------------------------------------------
{ TvistaMixer }
constructor TvistaMixer.Create;
begin
CoCreateInstance(CLSID_MMDeviceEnumerator, nil, CLSCTX_ALL, IID_IMMDeviceEnumerator, FmmDevEnum);
FmmDevEnum.GetDefaultAudioEndpoint(eRender, eMultimedia, FmmDev);
FmmDev.Activate(IID_IAudioEndpointVolume, CLSCTX_ALL, nil, FmmEndpoint);
end;
// ---------------------------------------------------------------------------
function TvistaMixer.getMute: boolean;
begin
FmmEndpoint.GetMute(Result);
end;
// ---------------------------------------------------------------------------
function TvistaMixer.getVolume: integer;
var
VolLevel: Single;
begin
FmmEndpoint.GetMasterVolumeLevelScalar(VolLevel);
result := Round(VolLevel * 65535);
end;
// ---------------------------------------------------------------------------
procedure TvistaMixer.setMute(Value: boolean);
begin
FmmEndpoint.SetMute(Value, nil);
end;
// ---------------------------------------------------------------------------
procedure TvistaMixer.setVolume(Value: integer);
var
fValue: Single;
begin
if (value < 0) then
value := 0;
if (value > 65535) then
value := 65535;
fValue := Value/65535;
FmmEndpoint.SetMasterVolumeLevelScalar(fValue, nil);
end;
// ---------------------------------------------------------------------------
end.
-
unit MMDevApi_tlb;
interface
uses Windows, ActiveX, Classes, Graphics, OleServer, OleCtrls, StdVCL,ComObj;
const
// TypeLibrary Major and minor versions
CLSID_MMDeviceEnumerator: TGUID = '{BCDE0395-E52F-467C-8E3D-C4579291692E}';
IID_IMMDeviceEnumerator: TGUID = '{A95664D2-9614-4F35-A746-DE8DB63617E6}';
IID_IMMDevice: TGUID = '{D666063F-1587-4E43-81F1-B948E807363F}';
IID_IMMDeviceCollection: TGUID = '{0BD7A1BE-7A1A-44DB-8397-CC5392387B5E}';
IID_IAudioEndpointVolume: TGUID = '{5CDF2C82-841E-4546-9722-0CF74078229A}';
IID_IAudioMeterInformation : TGUID = '{C02216F6-8C67-4B5B-9D00-D008E73E0064}';
IID_IAudioEndpointVolumeCallback: TGUID = '{657804FA-D6AD-4496-8A60-352752AF4F89}';
GUID_NULL: TGUID = '{00000000-0000-0000-0000-000000000000}';
DEVICE_STATE_ACTIVE = $00000001;
DEVICE_STATE_UNPLUGGED = $00000002;
DEVICE_STATE_NOTPRESENT = $00000004;
DEVICE_STATEMASK_ALL = $00000007;
type
EDataFlow = TOleEnum;
const
eRender = $00000000;
eCapture = $00000001;
eAll = $00000002;
EDataFlow_enum_count = $00000003;
type
ERole = TOleEnum;
const
eConsole = $00000000;
eMultimedia = $00000001;
eCommunications = $00000002;
ERole_enum_count = $00000003;
type
IAudioEndpointVolumeCallback = interface(IUnknown)
['{657804FA-D6AD-4496-8A60-352752AF4F89}']
end;
IMMAudioEndpointVolume = interface(IUnknown)
['{5CDF2C82-841E-4546-9722-0CF74078229A}']
Function RegisterControlChangeNotify(AudioEndPtVol: IAudioEndpointVolumeCallback): Integer; stdcall;
Function UnregisterControlChangeNotify(AudioEndPtVol: IAudioEndpointVolumeCallback): Integer; stdcall;
Function GetChannelCount(out PInteger): Integer; stdcall;
Function SetMasterVolumeLevel(fLevelDB: single; pguidEventContext: PGUID):Integer; stdcall;
Function SetMasterVolumeLevelScalar(fLevelDB: single; pguidEventContext: PGUID):Integer; stdcall;
Function GetMasterVolumeLevel(out fLevelDB: single):Integer; stdcall;
Function GetMasterVolumeLevelScalar(out fLevel: single):Integer; stdcall;
Function SetChannelVolumeLevel(nChannel: Integer; fLevelDB: double; pguidEventContext: TGUID):Integer; stdcall;
Function SetChannelVolumeLevelScalar(nChannel: Integer; fLevelDB: single; pguidEventContext: TGUID):Integer; stdcall;
Function GetChannelVolumeLevel(nChannel: Integer; out fLevelDB: double) : Integer; stdcall;
Function GetChannelVolumeLevelScalar(nChannel: Integer; out fLevel: double) : Integer; stdcall;
Function SetMute(bMute: Boolean ; pguidEventContext: PGUID) :Integer; stdcall;
Function GetMute(out bMute: Boolean) :Integer; stdcall;
Function GetVolumeStepInfo(pnStep: Integer; out pnStepCount: Integer):Integer; stdcall;
Function VolumeStepUp(pguidEventContext: TGUID) :Integer; stdcall;
Function VolumeStepDown(pguidEventContext: TGUID) :Integer; stdcall;
Function QueryHardwareSupport(out pdwHardwareSupportMask): Integer; stdcall;
Function GetVolumeRange(out pflVolumeMindB: double; out pflVolumeMaxdB: double; out pflVolumeIncrementdB: double): Integer; stdcall;
end;
IPropertyStore = interface(IUnknown)
end;
type
IMMDevice = interface(IUnknown)
['{D666063F-1587-4E43-81F1-B948E807363F}']
Function Activate( const refId :TGUID;
dwClsCtx: DWORD;
pActivationParams: PInteger ;
out pEndpointVolume: IMMAudioEndpointVolume): Hresult; stdCall;
Function OpenPropertyStore(stgmAccess: DWORD; out ppProperties :IPropertyStore): Hresult; stdcall;
Function GetId(out ppstrId: PLPWSTR): Hresult; stdcall;
Function GetState(out State :Integer): Hresult; stdcall;
end;
IMMDeviceCollection = interface(IUnknown)
['{0BD7A1BE-7A1A-44DB-8397-CC5392387B5E}']
end;
IMMNotificationClient = interface (IUnknown)
['{7991EEC9-7E89-4D85-8390-6C703CEC60C0}']
end;
IMMDeviceEnumerator = interface(IUnknown)
['{A95664D2-9614-4F35-A746-DE8DB63617E6}']
Function EnumAudioEndpoints(dataFlow: EDataFlow; deviceState: SYSUINT; DevCollection:IMMDeviceCollection): Hresult ; stdcall;
Function GetDefaultAudioEndpoint(EDF: SYSUINT; ER: SYSUINT; out Dev :IMMDevice): Hresult ; stdcall;
Function GetDevice(pwstrId: pointer ; out Dev :IMMDevice) : HResult; stdcall;
Function RegisterEndpointNotificationCallback(pClient :IMMNotificationClient) :Hresult; stdcall;
end;
implementation
end.
这是一个除了水珠的出色答卷。 SetMute/GetMute函数的声明必须使用32位整数值
unit MMDevApi_tlb;
const
DEVICE_STATE_ACTIVE = $00000001;
DEVICE_STATE_UNPLUGGED = $00000002;
DEVICE_STATE_NOTPRESENT = $00000004;
DEVICE_STATEMASK_ALL = $00000007;
IMMAudioEndpointVolume = interface(IUnknown)
['{5CDF2C82-841E-4546-9722-0CF74078229A}']
Function SetMute(iMute: Integer; pguidEventContext: PGUID) :Integer; stdcall;
Function GetMute(out iMute: Integer) :Integer; stdcall;
变化SetMute和GetMute声明整数变量和投德尔福布尔整数。
方法调用然后 VAR iMute:整数 AudioEndVol.SetMute(整数(CheckBox1.Checked),@GUID_NULL); AudioEndVol.GetMute(iMute);
使用bool不会使托盘图标正确识别静音状态,并且取消静音完全不起作用。 getmute一样,它必须使用32位整数输出参数或内存对齐被随机破坏。我不明白如此搜索的推理,并找到了一篇极好的JEDI文章。
一些win32调用对于按位值非常非常挑剔,Delphi Bool/Boolean并不总是适合C对应。使用32位整数来表示C布尔变量以具有精确的按位匹配。大多数win32 C方法都不是那么严格,并且可以在bool/boolean下正常工作。这个特定的MMDeviceAPI.SetMute函数是一个罕见的案例,Delphi程序员受到重创。 http://blog.delphi-jedi.net/2008/09/25/bool-boolean-and-integer/
你可能想读一些文章:http://www.codeguru.com/csharp/csharp/cs_graphics/sound/article.php/c10931 http://www.dreamincode.net/forums/的index.php?showtopic = 45693 – 2010-03-04 01:27:26