如何更改主音量？使用此代码
[DllImport ("winmm.dll")]
public static extern int waveOutSetVolume (IntPtr hwo, uint dwVolume);
waveOutSetVolume (IntPtr.Zero, (((uint)uint.MaxValue & 0x0000ffff) | ((uint)uint.MaxValue << 16)));
我可以设置波形音量，但如果主音量太低，这将没有任何效果。
感谢您的帮助。
最佳答案
好的，开始了:
const int MAXPNAMELEN = 32;
const int MIXER_SHORT_NAME_CHARS = 16;
const int MIXER_LONG_NAME_CHARS = 64;
[Flags] enum MIXERLINE_LINEF : uint{
ACTIVE = 0x00000001,
DISCONNECTED = 0x00008000,
SOURCE = 0x80000000
}
[Flags] enum MIXER : uint{
GETLINEINFOF_DESTINATION = 0x00000000,
GETLINEINFOF_SOURCE = 0x00000001,
GETLINEINFOF_LINEID = 0x00000002,
GETLINEINFOF_COMPONENTTYPE = 0x00000003,
GETLINEINFOF_TARGETTYPE = 0x00000004,
GETLINEINFOF_QUERYMASK = 0x0000000F,
GETLINECONTROLSF_ALL = 0x00000000,
GETLINECONTROLSF_ONEBYID = 0x00000001,
GETLINECONTROLSF_ONEBYTYPE = 0x00000002,
GETLINECONTROLSF_QUERYMASK = 0x0000000F,
GETCONTROLDETAILSF_VALUE = 0x00000000,
GETCONTROLDETAILSF_LISTTEXT = 0x00000001,
GETCONTROLDETAILSF_QUERYMASK = 0x0000000F,
OBJECTF_MIXER = 0x00000000,
OBJECTF_WAVEOUT = 0x10000000,
OBJECTF_WAVEIN = 0x20000000,
OBJECTF_MIDIOUT = 0x30000000,
OBJECTF_MIDIIN = 0x40000000,
OBJECTF_AUX = 0x50000000,
OBJECTF_HANDLE = 0x80000000,
OBJECTF_HMIXER = OBJECTF_HANDLE | OBJECTF_MIXER,
OBJECTF_HWAVEOUT = OBJECTF_HANDLE | OBJECTF_WAVEOUT,
OBJECTF_HWAVEIN = OBJECTF_HANDLE | OBJECTF_WAVEIN,
OBJECTF_HMIDIOUT = OBJECTF_HANDLE | OBJECTF_MIDIOUT,
OBJECTF_HMIDIIN = OBJECTF_HANDLE | OBJECTF_MIDIIN
}
[Flags] enum MIXERCONTROL_CT : uint{
CLASS_MASK = 0xF0000000,
CLASS_CUSTOM = 0x00000000,
CLASS_METER = 0x10000000,
CLASS_SWITCH = 0x20000000,
CLASS_NUMBER = 0x30000000,
CLASS_SLIDER = 0x40000000,
CLASS_FADER = 0x50000000,
CLASS_TIME = 0x60000000,
CLASS_LIST = 0x70000000,
SUBCLASS_MASK = 0x0F000000,
SC_SWITCH_BOOLEAN = 0x00000000,
SC_SWITCH_BUTTON = 0x01000000,
SC_METER_POLLED = 0x00000000,
SC_TIME_MICROSECS = 0x00000000,
SC_TIME_MILLISECS = 0x01000000,
SC_LIST_SINGLE = 0x00000000,
SC_LIST_MULTIPLE = 0x01000000,
UNITS_MASK = 0x00FF0000,
UNITS_CUSTOM = 0x00000000,
UNITS_BOOLEAN = 0x00010000,
UNITS_SIGNED = 0x00020000,
UNITS_UNSIGNED = 0x00030000,
UNITS_DECIBELS = 0x00040000, /* in 10ths */
UNITS_PERCENT = 0x00050000, /* in 10ths */
}
[Flags] enum MIXERCONTROL_CONTROLTYPE : uint{
CUSTOM = MIXERCONTROL_CT.CLASS_CUSTOM | MIXERCONTROL_CT.UNITS_CUSTOM,
BOOLEANMETER = MIXERCONTROL_CT.CLASS_METER | MIXERCONTROL_CT.SC_METER_POLLED | MIXERCONTROL_CT.UNITS_BOOLEAN,
SIGNEDMETER = MIXERCONTROL_CT.CLASS_METER | MIXERCONTROL_CT.SC_METER_POLLED | MIXERCONTROL_CT.UNITS_SIGNED,
PEAKMETER = SIGNEDMETER + 1,
UNSIGNEDMETER = MIXERCONTROL_CT.CLASS_METER | MIXERCONTROL_CT.SC_METER_POLLED | MIXERCONTROL_CT.UNITS_UNSIGNED,
BOOLEAN = MIXERCONTROL_CT.CLASS_SWITCH | MIXERCONTROL_CT.SC_SWITCH_BOOLEAN | MIXERCONTROL_CT.UNITS_BOOLEAN,
ONOFF = BOOLEAN + 1,
MUTE = BOOLEAN + 2,
MONO = BOOLEAN + 3,
LOUDNESS = BOOLEAN + 4,
STEREOENH = BOOLEAN + 5,
BASS_BOOST = BOOLEAN + 0x00002277,
BUTTON = MIXERCONTROL_CT.CLASS_SWITCH | MIXERCONTROL_CT.SC_SWITCH_BUTTON | MIXERCONTROL_CT.UNITS_BOOLEAN,
DECIBELS = MIXERCONTROL_CT.CLASS_NUMBER | MIXERCONTROL_CT.UNITS_DECIBELS,
SIGNED = MIXERCONTROL_CT.CLASS_NUMBER | MIXERCONTROL_CT.UNITS_SIGNED,
UNSIGNED = MIXERCONTROL_CT.CLASS_NUMBER | MIXERCONTROL_CT.UNITS_UNSIGNED,
PERCENT = MIXERCONTROL_CT.CLASS_NUMBER | MIXERCONTROL_CT.UNITS_PERCENT,
SLIDER = MIXERCONTROL_CT.CLASS_SLIDER | MIXERCONTROL_CT.UNITS_SIGNED,
PAN = SLIDER + 1,
QSOUNDPAN = SLIDER + 2,
FADER = MIXERCONTROL_CT.CLASS_FADER | MIXERCONTROL_CT.UNITS_UNSIGNED,
VOLUME = FADER + 1,
BASS = FADER + 2,
TREBLE = FADER + 3,
EQUALIZER = FADER + 4,
SINGLESELECT = MIXERCONTROL_CT.CLASS_LIST | MIXERCONTROL_CT.SC_LIST_SINGLE | MIXERCONTROL_CT.UNITS_BOOLEAN,
MUX = SINGLESELECT + 1,
MULTIPLESELECT = MIXERCONTROL_CT.CLASS_LIST | MIXERCONTROL_CT.SC_LIST_MULTIPLE | MIXERCONTROL_CT.UNITS_BOOLEAN,
MIXER = MULTIPLESELECT + 1,
MICROTIME = MIXERCONTROL_CT.CLASS_TIME | MIXERCONTROL_CT.SC_TIME_MICROSECS | MIXERCONTROL_CT.UNITS_UNSIGNED,
MILLITIME = MIXERCONTROL_CT.CLASS_TIME | MIXERCONTROL_CT.SC_TIME_MILLISECS | MIXERCONTROL_CT.UNITS_UNSIGNED
}
[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)]
struct MIXERLINE{
[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)]
public struct TargetInfo{
public uint dwType;
public uint dwDeviceID;
public ushort wMid;
public ushort wPid;
public uint vDriverVersion;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst=MAXPNAMELEN)]
public string szPname;
}
public uint cbStruct;
public uint dwDestination;
public uint dwSource;
public uint dwLineID;
public MIXERLINE_LINEF fdwLine;
public uint dwUser;
public uint dwComponentType;
public uint cChannels;
public uint cConnection;
public uint cControls;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst=MIXER_SHORT_NAME_CHARS)]
public string szShortName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst=MIXER_LONG_NAME_CHARS)]
public string szName;
public TargetInfo Target;
}
[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)]
struct MIXERCONTROL{
[StructLayout(LayoutKind.Explicit)]
public struct BoundsInfo{
[FieldOffset(0)]
public int lMinimum;
[FieldOffset(4)]
public int lMaximum;
[FieldOffset(0)]
public uint dwMinimum;
[FieldOffset(4)]
public uint dwMaximum;
[FieldOffset(8), MarshalAs(UnmanagedType.ByValArray, SizeConst=4)]
public uint[] dwReserved;
}
[StructLayout(LayoutKind.Explicit)]
public struct MetricsInfo{
[FieldOffset(0)]
public uint cSteps;
[FieldOffset(0)]
public uint cbCustomData;
[FieldOffset(4), MarshalAs(UnmanagedType.ByValArray, SizeConst=5)]
public uint[] dwReserved;
}
public uint cbStruct;
public uint dwControlID;
public MIXERCONTROL_CONTROLTYPE dwControlType;
public uint fdwControl;
public uint cMultipleItems;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst=MIXER_SHORT_NAME_CHARS)]
public string szShortName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst=MIXER_LONG_NAME_CHARS)]
public string szName;
public BoundsInfo Bounds;
public MetricsInfo Metrics;
}
[StructLayout(LayoutKind.Explicit)]
struct MIXERLINECONTROLS{
[FieldOffset(0)]
public uint cbStruct;
[FieldOffset(4)]
public uint dwLineID;
[FieldOffset(8)]
public uint dwControlID;
[FieldOffset(8)] // not a typo! overlaps previous field
public uint dwControlType;
[FieldOffset(12)]
public uint cControls;
[FieldOffset(16)]
public uint cbmxctrl;
[FieldOffset(20)]
public IntPtr pamxctrl;
}
[StructLayout(LayoutKind.Explicit)]
struct MIXERCONTROLDETAILS{
[FieldOffset(0)]
public uint cbStruct;
[FieldOffset(4)]
public uint dwControlID;
[FieldOffset(8)]
public uint cChannels;
[FieldOffset(12)]
public IntPtr hwndOwner;
[FieldOffset(12)] // not a typo!
public uint cMultipleItems;
[FieldOffset(16)]
public uint cbDetails;
[FieldOffset(20)]
public IntPtr paDetails;
}
[StructLayout(LayoutKind.Sequential)]
struct VOLUME{
public int left;
public int right;
}
struct MixerInfo{
public uint volumeCtl;
public uint muteCtl;
public int minVolume;
public int maxVolume;
}
[DllImport("WinMM.dll", CharSet=CharSet.Auto)]
static extern uint mixerGetLineInfo (IntPtr hmxobj, ref MIXERLINE pmxl, MIXER flags);
[DllImport("WinMM.dll", CharSet=CharSet.Auto)]
static extern uint mixerGetLineControls (IntPtr hmxobj, ref MIXERLINECONTROLS pmxlc, MIXER flags);
[DllImport("WinMM.dll", CharSet=CharSet.Auto)]
static extern uint mixerGetControlDetails(IntPtr hmxobj, ref MIXERCONTROLDETAILS pmxcd, MIXER flags);
[DllImport("WinMM.dll", CharSet=CharSet.Auto)]
static extern uint mixerSetControlDetails(IntPtr hmxobj, ref MIXERCONTROLDETAILS pmxcd, MIXER flags);
static MixerInfo GetMixerControls(){
MIXERLINE mxl = new MIXERLINE();
MIXERLINECONTROLS mlc = new MIXERLINECONTROLS();
mxl.cbStruct = (uint)Marshal.SizeOf(typeof(MIXERLINE));
mlc.cbStruct = (uint)Marshal.SizeOf(typeof(MIXERLINECONTROLS));
mixerGetLineInfo(IntPtr.Zero, ref mxl, MIXER.OBJECTF_MIXER | MIXER.GETLINEINFOF_DESTINATION);
mlc.dwLineID = mxl.dwLineID;
mlc.cControls = mxl.cControls;
mlc.cbmxctrl = (uint)Marshal.SizeOf(typeof(MIXERCONTROL));
mlc.pamxctrl = Marshal.AllocHGlobal((int)(mlc.cbmxctrl * mlc.cControls));
mixerGetLineControls(IntPtr.Zero, ref mlc, MIXER.OBJECTF_MIXER | MIXER.GETLINECONTROLSF_ALL);
MixerInfo rtn = new MixerInfo();
for(int i = 0; i < mlc.cControls; i++){
MIXERCONTROL mxc = (MIXERCONTROL)Marshal.PtrToStructure((IntPtr)((int)mlc.pamxctrl + (int)mlc.cbmxctrl * i), typeof(MIXERCONTROL));
switch(mxc.dwControlType){
case MIXERCONTROL_CONTROLTYPE.VOLUME:
rtn.volumeCtl = mxc.dwControlID;
rtn.minVolume = mxc.Bounds.lMinimum;
rtn.maxVolume = mxc.Bounds.lMaximum;
break;
case MIXERCONTROL_CONTROLTYPE.MUTE:
rtn.muteCtl = mxc.dwControlID;
break;
}
}
Marshal.FreeHGlobal(mlc.pamxctrl);
return rtn;
}
static VOLUME GetVolume(MixerInfo mi){
MIXERCONTROLDETAILS mcd = new MIXERCONTROLDETAILS();
mcd.cbStruct = (uint)Marshal.SizeOf(typeof(MIXERCONTROLDETAILS));
mcd.dwControlID = mi.volumeCtl;
mcd.cMultipleItems = 0;
mcd.cChannels = 2;
mcd.cbDetails = (uint)Marshal.SizeOf(typeof(int));
mcd.paDetails = Marshal.AllocHGlobal((int)mcd.cbDetails);
mixerGetControlDetails(IntPtr.Zero, ref mcd, MIXER.GETCONTROLDETAILSF_VALUE | MIXER.OBJECTF_MIXER);
VOLUME rtn = (VOLUME)Marshal.PtrToStructure(mcd.paDetails, typeof(VOLUME));
Marshal.FreeHGlobal(mcd.paDetails);
return rtn;
}
static bool IsMuted(MixerInfo mi){
MIXERCONTROLDETAILS mcd = new MIXERCONTROLDETAILS();
mcd.cbStruct = (uint)Marshal.SizeOf(typeof(MIXERCONTROLDETAILS));
mcd.dwControlID = mi.muteCtl;
mcd.cMultipleItems = 0;
mcd.cChannels = 1;
mcd.cbDetails = 4;
mcd.paDetails = Marshal.AllocHGlobal((int)mcd.cbDetails);
mixerGetControlDetails(IntPtr.Zero, ref mcd, MIXER.GETCONTROLDETAILSF_VALUE | MIXER.OBJECTF_MIXER);
int rtn = Marshal.ReadInt32(mcd.paDetails);
Marshal.FreeHGlobal(mcd.paDetails);
return rtn != 0;
}
static void AdjustVolume(MixerInfo mi, int delta){
VOLUME volume = GetVolume(mi);
if(delta > 0){
volume.left = Math.Min(mi.maxVolume, volume.left + delta);
volume.right = Math.Min(mi.maxVolume, volume.right + delta);
}else{
volume.left = Math.Max(mi.minVolume, volume.left + delta);
volume.right = Math.Max(mi.minVolume, volume.right + delta);
}
SetVolume(mi, volume);
}
static void SetVolume(MixerInfo mi, VOLUME volume){
MIXERCONTROLDETAILS mcd = new MIXERCONTROLDETAILS();
mcd.cbStruct = (uint)Marshal.SizeOf(typeof(MIXERCONTROLDETAILS));
mcd.dwControlID = mi.volumeCtl;
mcd.cMultipleItems = 0;
mcd.cChannels = 2;
mcd.cbDetails = (uint)Marshal.SizeOf(typeof(int));
mcd.paDetails = Marshal.AllocHGlobal((int)mcd.cbDetails);
Marshal.StructureToPtr(volume, mcd.paDetails, false);
mixerSetControlDetails(IntPtr.Zero, ref mcd, MIXER.GETCONTROLDETAILSF_VALUE | MIXER.OBJECTF_MIXER);
Marshal.FreeHGlobal(mcd.paDetails);
}
static void SetMute(MixerInfo mi, bool mute){
MIXERCONTROLDETAILS mcd = new MIXERCONTROLDETAILS();
mcd.cbStruct = (uint)Marshal.SizeOf(typeof(MIXERCONTROLDETAILS));
mcd.dwControlID = mi.muteCtl;
mcd.cMultipleItems = 0;
mcd.cChannels = 1;
mcd.cbDetails = 4;
mcd.paDetails = Marshal.AllocHGlobal((int)mcd.cbDetails);
Marshal.WriteInt32(mcd.paDetails, mute ? 1 : 0);
mixerSetControlDetails(IntPtr.Zero, ref mcd, MIXER.GETCONTROLDETAILSF_VALUE | MIXER.OBJECTF_MIXER);
Marshal.FreeHGlobal(mcd.paDetails);
}
这段代码又大又丑。它是一些 C++ 代码的翻译，而且必须定义所有 P/Invoke 的东西，所以代码要多得多。但我已经测试过了，它确实有效。要使用它，您只需要像这样的东西:
MixerInfo mi = GetMixerControls();
AdjustVolume(mi, 100); // add 100 to the current volume
或
MixerInfo mi = GetMixerControls();
AdjustVolume(mi, (mi.maxVolume - mi.minVolume) / 10); // increase the volume by 10% of total range
或
MixerInfo mi = GetMixerControls();
SetVolume(mi, mi.maxVolume); // let's get this party crunk'd!
或
MixerInfo mi = GetMixerControls();
SetMute(mi, true); // shhhh!!!!!!
警告
由于使用了固定大小的整数和字段偏移量，这在 64 位 Windows 上可能会失败。我不知道，我没有测试过，也没有足够注意知道这些字段大小是否扩展到 64 位。 警告代码
编辑
为了简单起见(相对而言)，我省略了任何错误处理。您真的应该检查所有 mixerXXX 函数的返回码，但我将把它留给读者作为练习(读作:我太懒了，没法这样做)。
关于c# - 更改主音量级别，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/294292/
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