private MethodIL EmitIL()
{
if (!_importMetadata.Flags.PreserveSig)
{
throw new NotSupportedException();
}
if (MarshalHelpers.ShouldCheckForPendingException(_targetMethod.Context.Target, _importMetadata))
{
throw new NotSupportedException();
}
if (_targetMethod.IsUnmanagedCallersOnly)
{
throw new NotSupportedException();
}
if (_targetMethod.HasCustomAttribute("System.Runtime.InteropServices", "LCIDConversionAttribute"))
{
throw new NotSupportedException();
}
PInvokeILCodeStreams pInvokeILCodeStreams = new PInvokeILCodeStreams();
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
ILCodeStream marshallingCodestream = pInvokeILCodeStreams.MarshallingCodeStream;
ILCodeStream unmarshallingCodestream = pInvokeILCodeStreams.UnmarshallingCodestream;
ILCodeStream cleanupCodestream = pInvokeILCodeStreams.CleanupCodeStream;
// Marshalling is wrapped in a finally block to guarantee cleanup
ILExceptionRegionBuilder tryFinally = emitter.NewFinallyRegion();
marshallingCodestream.BeginTry(tryFinally);
cleanupCodestream.BeginHandler(tryFinally);
// Marshal the arguments
for (int i = 0; i < _marshallers.Length; i++)
{
_marshallers[i].EmitMarshallingIL(pInvokeILCodeStreams);
}
EmitPInvokeCall(pInvokeILCodeStreams);
ILCodeLabel lReturn = emitter.NewCodeLabel();
unmarshallingCodestream.Emit(ILOpcode.leave, lReturn);
unmarshallingCodestream.EndTry(tryFinally);
cleanupCodestream.Emit(ILOpcode.endfinally);
cleanupCodestream.EndHandler(tryFinally);
cleanupCodestream.EmitLabel(lReturn);
_marshallers[0].LoadReturnValue(cleanupCodestream);
cleanupCodestream.Emit(ILOpcode.ret);
return(new PInvokeILStubMethodIL((ILStubMethodIL)emitter.Link(_targetMethod)));
}
public static string GetRealmPath(User user, Uri serverUri)
{
DoInitialFileSystemConfiguration();
return(MarshalHelpers.GetString((IntPtr buffer, IntPtr bufferLength, out bool isNull, out NativeException ex) =>
{
isNull = false;
return NativeMethods.get_path_for_realm(user.Handle, serverUri.AbsoluteUri, (IntPtr)serverUri.AbsoluteUri.Length, buffer, bufferLength, out ex);
}));
}
/// <summary>
/// Gets a specified Mixer Control
/// </summary>
/// <param name="mixerHandle">Mixer Handle</param>
/// <param name="nLineId">Line ID</param>
/// <param name="controlId">Control ID</param>
/// <param name="nChannels">Number of Channels</param>
/// <param name="mixerFlags">Flags to use (indicates the meaning of mixerHandle)</param>
/// <returns></returns>
public static MixerControl GetMixerControl(IntPtr mixerHandle, int nLineId, int controlId, int nChannels,
MixerFlags mixerFlags)
{
var mlc = new MixerInterop.MIXERLINECONTROLS();
var mc = new MixerInterop.MIXERCONTROL();
// set up the pointer to a structure
IntPtr pMixerControl = Marshal.AllocCoTaskMem(Marshal.SizeOf(mc));
//Marshal.StructureToPtr(mc, pMixerControl, false);
mlc.cbStruct = Marshal.SizeOf(mlc);
mlc.cControls = 1;
mlc.dwControlID = controlId;
mlc.cbmxctrl = Marshal.SizeOf(mc);
mlc.pamxctrl = pMixerControl;
mlc.dwLineID = nLineId;
MmResult err = MixerInterop.mixerGetLineControls(mixerHandle, ref mlc, MixerFlags.OneById | mixerFlags);
if (err != MmResult.NoError)
{
Marshal.FreeCoTaskMem(pMixerControl);
throw new MmException(err, "mixerGetLineControls");
}
// retrieve the structure from the pointer
mc = MarshalHelpers.PtrToStructure <MixerInterop.MIXERCONTROL>(mlc.pamxctrl);
Marshal.FreeCoTaskMem(pMixerControl);
if (IsControlBoolean(mc.dwControlType))
{
return(new BooleanMixerControl(mc, mixerHandle, mixerFlags, nChannels));
}
if (IsControlSigned(mc.dwControlType))
{
return(new SignedMixerControl(mc, mixerHandle, mixerFlags, nChannels));
}
if (IsControlUnsigned(mc.dwControlType))
{
return(new UnsignedMixerControl(mc, mixerHandle, mixerFlags, nChannels));
}
if (IsControlListText(mc.dwControlType))
{
return(new ListTextMixerControl(mc, mixerHandle, mixerFlags, nChannels));
}
if (IsControlCustom(mc.dwControlType))
{
return(new CustomMixerControl(mc, mixerHandle, mixerFlags, nChannels));
}
throw new InvalidOperationException($"Unknown mixer control type {mc.dwControlType}");
}
/// <summary>
/// Sets the parameters that describe the properties of the client's audio stream.
/// </summary>
/// <param name="useHardwareOffload">Boolean value to indicate whether or not the audio stream is hardware-offloaded.</param>
/// <param name="category">An enumeration that is used to specify the category of the audio stream.</param>
/// <param name="options">A bit-field describing the characteristics of the stream. Supported in Windows 8.1 and later.</param>
public void SetClientProperties(bool useHardwareOffload, AudioStreamCategory category, AudioClientStreamOptions options)
{
audioClientProperties = new AudioClientProperties()
{
cbSize = (uint)MarshalHelpers.SizeOf <AudioClientProperties>(),
bIsOffload = Convert.ToInt32(useHardwareOffload),
eCategory = category,
Options = options
};
}
private void AddDependenciesDueToPInvokeStruct(ref DependencyList dependencies, NodeFactory factory, TypeDesc type)
{
if (MarshalHelpers.IsStructMarshallingRequired(type))
{
dependencies.Add(factory.NecessaryTypeSymbol(type), "Struct Marshalling Stub");
var stub = (StructMarshallingThunk)GetStructMarshallingManagedToNativeStub(type);
dependencies.Add(factory.MethodEntrypoint(stub), "Struct Marshalling stub");
dependencies.Add(factory.MethodEntrypoint(GetStructMarshallingNativeToManagedStub(type)), "Struct Marshalling stub");
dependencies.Add(factory.MethodEntrypoint(GetStructMarshallingCleanupStub(type)), "Struct Marshalling stub");
AddDependenciesDueToPInvokeStructDelegateField(ref dependencies, factory, type);
}
}
public static UInt32 PartyXblChatUserGetCustomContext(
PARTY_XBL_CHAT_USER_HANDLE handle,
out Object customContext)
{
if (handle == null)
{
customContext = null;
return(PartyError.InvalidArg);
}
return(MarshalHelpers.GetCustomContext <Interop.PARTY_XBL_CHAT_USER_HANDLE>(
PartyXblInterop.PartyXblChatUserGetCustomContext,
handle.InteropHandle,
out customContext));
}
private static void ConvertXmlToBinary(List <string> args)
{
if (args.Count != 2)
{
Console.WriteLine("infile and outfile required");
return;
}
string inFile = args[0];
string outFile = args[1];
WifiMp3Settings settings = ReadSettingsFromFile(inFile);
byte[] data = MarshalHelpers.ToBytes(settings);
File.WriteAllBytes(outFile, data);
}
private static void AddAttribute(IMFActivate mft, int index, StringBuilder sb)
{
var variantPtr = Marshal.AllocHGlobal(MarshalHelpers.SizeOf <PropVariant>());
try
{
Guid key;
mft.GetItemByIndex(index, out key, variantPtr);
var value = MarshalHelpers.PtrToStructure <PropVariant>(variantPtr);
string propertyName = FieldDescriptionHelper.Describe(typeof(MediaFoundationAttributes), key);
if (key == MediaFoundationAttributes.MFT_INPUT_TYPES_Attributes ||
key == MediaFoundationAttributes.MFT_OUTPUT_TYPES_Attributes)
{
var types = value.GetBlobAsArrayOf <MFT_REGISTER_TYPE_INFO>();
sb.AppendFormat("{0}: {1} items:", propertyName, types.Length);
sb.AppendLine();
foreach (var t in types)
{
sb.AppendFormat(" {0}-{1}",
FieldDescriptionHelper.Describe(typeof(MediaTypes), t.guidMajorType),
FieldDescriptionHelper.Describe(typeof(AudioSubtypes), t.guidSubtype));
sb.AppendLine();
}
}
else if (key == MediaFoundationAttributes.MF_TRANSFORM_CATEGORY_Attribute)
{
sb.AppendFormat("{0}: {1}", propertyName,
FieldDescriptionHelper.Describe(typeof(MediaFoundationTransformCategories), (Guid)value.Value));
sb.AppendLine();
}
else if (value.DataType == (VarEnum.VT_VECTOR | VarEnum.VT_UI1))
{
var b = (byte[])value.Value;
sb.AppendFormat("{0}: Blob of {1} bytes", propertyName, b.Length);
sb.AppendLine();
}
else
{
sb.AppendFormat("{0}: {1}", propertyName, value.Value);
sb.AppendLine();
}
}
finally
{
PropVariant.Clear(variantPtr);
Marshal.FreeHGlobal(variantPtr);
}
}
public static UInt32 PartyXblGetChatUsers(
PARTY_XBL_HANDLE handle,
out PARTY_XBL_CHAT_USER_HANDLE[] chatUsers)
{
chatUsers = null;
if (handle == null)
{
return(PartyError.InvalidArg);
}
return(MarshalHelpers.GetArrayOfObjects <Interop.PARTY_XBL_HANDLE, Interop.PARTY_XBL_CHAT_USER_HANDLE, PARTY_XBL_CHAT_USER_HANDLE>(
PartyXblInterop.PartyXblGetChatUsers,
s => new PARTY_XBL_CHAT_USER_HANDLE(s),
handle.InteropHandle,
out chatUsers));
}
private TypeDesc GetNativeMethodParameterType(TypeDesc managedType, MarshalAsDescriptor marshalAs, InteropStateManager interopStateManager, bool isReturn, bool isAnsi)
{
TypeDesc nativeType;
try
{
nativeType = MarshalHelpers.GetNativeMethodParameterType(managedType, marshalAs, interopStateManager, isReturn, isAnsi);
}
catch (NotSupportedException)
{
// if marshalling is not supported for this type the generated stubs will emit appropriate
// error message. We just set native type to be same as managedtype
nativeType = managedType;
}
return(nativeType);
}
private void EmitPInvokeCall(PInvokeILCodeStreams ilCodeStreams)
{
ILEmitter emitter = ilCodeStreams.Emitter;
ILCodeStream callsiteSetupCodeStream = ilCodeStreams.CallsiteSetupCodeStream;
TypeSystemContext context = _targetMethod.Context;
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
MetadataType stubHelpersType = InteropTypes.GetStubHelpers(context);
// if the SetLastError flag is set in DllImport, clear the error code before doing P/Invoke
if (_importMetadata.Flags.SetLastError)
{
if (!MarshalHelpers.IsRuntimeMarshallingEnabled(((MetadataType)_targetMethod.OwningType).Module))
{
// When runtime marshalling is disabled, we don't support generating the stub IL
// in Ready-to-Run so we can correctly throw an exception at runtime when the user tries to
// use SetLastError=true when marshalling is disabled.
throw new NotSupportedException();
}
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("ClearLastError", null)));
}
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags, 0, nativeReturnType,
nativeParameterTypes);
var rawTargetMethod = new PInvokeTargetNativeMethod(_targetMethod, nativeSig);
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(rawTargetMethod));
// if the SetLastError flag is set in DllImport, call the PInvokeMarshal.SaveLastError
// so that last error can be used later by calling Marshal.GetLastPInvokeError
if (_importMetadata.Flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("SetLastError", null)));
}
}
private void AddParameterMarshallingDependencies(ref DependencyList dependencies, NodeFactory factory, MethodDesc method, TypeDesc type)
{
if (type.IsDelegate)
{
dependencies.Add(factory.DelegateMarshallingData((DefType)type), "Delegate marshaling");
}
TypeSystemContext context = type.Context;
if ((type.IsWellKnownType(WellKnownType.MulticastDelegate) ||
type == context.GetWellKnownType(WellKnownType.MulticastDelegate).BaseType))
{
// If we hit this p/invoke as part of delegate marshalling (i.e. this is a delegate
// that has another delegate in the signature), blame the delegate type, not the marshalling thunk.
// This should ideally warn from the use site (e.g. where GetDelegateForFunctionPointer
// is called) but it's currently hard to get a warning from those spots and this guarantees
// we won't miss a spot (e.g. a p/invoke that has a delegate and that delegate contains
// a System.Delegate parameter).
MethodDesc reportedMethod = method;
if (reportedMethod is Internal.IL.Stubs.DelegateMarshallingMethodThunk delegateThunkMethod)
{
reportedMethod = delegateThunkMethod.InvokeMethod;
}
_logger.LogWarning(reportedMethod, DiagnosticId.CorrectnessOfAbstractDelegatesCannotBeGuaranteed, DiagnosticUtilities.GetMethodSignatureDisplayName(method));
}
// struct may contain delegate fields, hence we need to add dependencies for it
if (type.IsByRef)
{
type = ((ParameterizedType)type).ParameterType;
}
if (MarshalHelpers.IsStructMarshallingRequired(type))
{
foreach (FieldDesc field in type.GetFields())
{
if (field.IsStatic)
{
continue;
}
AddParameterMarshallingDependencies(ref dependencies, factory, method, field.FieldType);
}
}
}
private void AddPInvokeParameterDependencies(ref DependencyList dependencies, NodeFactory factory, TypeDesc parameter)
{
if (parameter.IsDelegate)
{
dependencies.Add(factory.NecessaryTypeSymbol(parameter), "Delegate Marshalling Stub");
dependencies.Add(factory.MethodEntrypoint(factory.InteropStubManager.GetOpenStaticDelegateMarshallingStub(parameter)), "Delegate Marshalling Stub");
dependencies.Add(factory.MethodEntrypoint(factory.InteropStubManager.GetClosedDelegateMarshallingStub(parameter)), "Delegate Marshalling Stub");
}
else if (MarshalHelpers.IsStructMarshallingRequired(parameter))
{
dependencies.Add(factory.ConstructedTypeSymbol(factory.InteropStubManager.GetStructMarshallingType(parameter)), "Struct Marshalling Type");
dependencies.Add(factory.MethodEntrypoint(factory.InteropStubManager.GetStructMarshallingManagedToNativeStub(parameter)), "Struct Marshalling stub");
dependencies.Add(factory.MethodEntrypoint(factory.InteropStubManager.GetStructMarshallingNativeToManagedStub(parameter)), "Struct Marshalling stub");
dependencies.Add(factory.MethodEntrypoint(factory.InteropStubManager.GetStructMarshallingCleanupStub(parameter)), "Struct Marshalling stub");
}
}
public override IEnumerable <DependencyListEntry> GetStaticDependencies(NodeFactory factory)
{
InteropStateManager stateManager = ((CompilerGeneratedInteropStubManager)factory.InteropStubManager)._interopStateManager;
yield return(new DependencyListEntry(factory.NecessaryTypeSymbol(_type), "Struct Marshalling Stub"));
// Not all StructMarshalingDataNodes require marshalling - some are only present because we want to
// generate field offset information for Marshal.OffsetOf.
if (MarshalHelpers.IsStructMarshallingRequired(_type))
{
yield return(new DependencyListEntry(factory.MethodEntrypoint(stateManager.GetStructMarshallingManagedToNativeThunk(_type)), "Struct Marshalling stub"));
yield return(new DependencyListEntry(factory.MethodEntrypoint(stateManager.GetStructMarshallingNativeToManagedThunk(_type)), "Struct Marshalling stub"));
yield return(new DependencyListEntry(factory.MethodEntrypoint(stateManager.GetStructMarshallingCleanupThunk(_type)), "Struct Marshalling stub"));
}
}
public static MethodIL EmitIL(MethodDesc method, PInvokeILEmitterConfiguration pinvokeILEmitterConfiguration, InteropStateManager interopStateManager)
{
try
{
return(new PInvokeILEmitter(method, pinvokeILEmitterConfiguration, interopStateManager).EmitIL());
}
catch (NotSupportedException)
{
string message = "Method '" + method.ToString() +
"' requires non-trivial marshalling that is not yet supported by this compiler.";
return(MarshalHelpers.EmitExceptionBody(message, method));
}
catch (InvalidProgramException ex)
{
Debug.Assert(!String.IsNullOrEmpty(ex.Message));
return(MarshalHelpers.EmitExceptionBody(ex.Message, method));
}
}
private static void DescribeAttribute(IMFMediaType mediaType, int n, StringBuilder sb)
{
var variantPtr = Marshal.AllocHGlobal(MarshalHelpers.SizeOf <PropVariant>());
try
{
Guid key;
mediaType.GetItemByIndex(n, out key, variantPtr);
var val = MarshalHelpers.PtrToStructure <PropVariant>(variantPtr);
string propertyName = FieldDescriptionHelper.Describe(typeof(MediaFoundationAttributes), key);
sb.AppendFormat("{0}={1}\r\n", propertyName, val.Value);
}
finally
{
PropVariant.Clear(variantPtr);
Marshal.FreeHGlobal(variantPtr);
}
}
public void OnNotify(IntPtr notifyData)
{
AudioVolumeNotificationDataStruct audioVolumeNotificationDataStruct = MarshalHelpers.PtrToStructure <AudioVolumeNotificationDataStruct>(notifyData);
IntPtr value = MarshalHelpers.OffsetOf <AudioVolumeNotificationDataStruct>("ChannelVolume");
IntPtr pointer = (IntPtr)((long)notifyData + (long)value);
float[] array = new float[audioVolumeNotificationDataStruct.nChannels];
int num = 0;
while ((long)num < (long)((ulong)audioVolumeNotificationDataStruct.nChannels))
{
array[num] = MarshalHelpers.PtrToStructure <float>(pointer);
num++;
}
AudioVolumeNotificationData notificationData = new AudioVolumeNotificationData(audioVolumeNotificationDataStruct.guidEventContext, audioVolumeNotificationDataStruct.bMuted, audioVolumeNotificationDataStruct.fMasterVolume, array, audioVolumeNotificationDataStruct.guidEventContext);
this.parent.FireNotification(notificationData);
}
private void AddDependenciesDueToPInvokeStruct(ref DependencyList dependencies, NodeFactory factory, TypeDesc type)
{
if (MarshalHelpers.IsStructMarshallingRequired(type))
{
dependencies.Add(factory.NecessaryTypeSymbol(type), "Struct Marshalling Stub");
var stub = (StructMarshallingThunk)GetStructMarshallingManagedToNativeStub(type);
dependencies.Add(factory.MethodEntrypoint(stub), "Struct Marshalling stub");
dependencies.Add(factory.MethodEntrypoint(GetStructMarshallingNativeToManagedStub(type)), "Struct Marshalling stub");
dependencies.Add(factory.MethodEntrypoint(GetStructMarshallingCleanupStub(type)), "Struct Marshalling stub");
foreach (var inlineArrayCandidate in stub.GetInlineArrayCandidates())
{
foreach (var method in inlineArrayCandidate.ElementType.GetMethods())
{
dependencies.Add(factory.MethodEntrypoint(method), "inline array marshalling stub");
}
}
}
}
/// <summary>
/// Gets all the mixer controls
/// </summary>
/// <param name="mixerHandle">Mixer Handle</param>
/// <param name="mixerLine">Mixer Line</param>
/// <param name="mixerHandleType">Mixer Handle Type</param>
/// <returns></returns>
public static IList <MixerControl> GetMixerControls(IntPtr mixerHandle, MixerLine mixerLine,
MixerFlags mixerHandleType)
{
var controls = new List <MixerControl>();
if (mixerLine.ControlsCount > 0)
{
int mixerControlSize = MarshalHelpers.SizeOf <MixerInterop.MIXERCONTROL>();
var mlc = new MixerInterop.MIXERLINECONTROLS();
IntPtr pmc = Marshal.AllocHGlobal(mixerControlSize * mixerLine.ControlsCount);
mlc.cbStruct = Marshal.SizeOf(mlc);
mlc.dwLineID = mixerLine.LineId;
mlc.cControls = mixerLine.ControlsCount;
mlc.pamxctrl = pmc;
mlc.cbmxctrl = MarshalHelpers.SizeOf <MixerInterop.MIXERCONTROL>();
try
{
MmResult err = MixerInterop.mixerGetLineControls(mixerHandle, ref mlc, MixerFlags.All | mixerHandleType);
if (err != MmResult.NoError)
{
throw new MmException(err, "mixerGetLineControls");
}
for (int i = 0; i < mlc.cControls; i++)
{
Int64 address = pmc.ToInt64() + mixerControlSize * i;
var mc =
MarshalHelpers.PtrToStructure <MixerInterop.MIXERCONTROL>((IntPtr)address);
var mixerControl = GetMixerControl(mixerHandle, mixerLine.LineId, mc.dwControlID, mixerLine.Channels,
mixerHandleType);
controls.Add(mixerControl);
}
}
finally
{
Marshal.FreeHGlobal(pmc);
}
}
return(controls);
}
/// <summary>
/// Helper function to retrieve a WaveFormat structure from a pointer
/// </summary>
/// <param name="pointer">WaveFormat structure</param>
/// <returns></returns>
public static WaveFormat MarshalFromPtr(IntPtr pointer)
{
var waveFormat = MarshalHelpers.PtrToStructure <WaveFormat>(pointer);
switch (waveFormat.Encoding)
{
case WaveFormatEncoding.Pcm:
// can't rely on extra size even being there for PCM so blank it to avoid reading
// corrupt data
waveFormat.extraSize = 0;
break;
default:
if (waveFormat.ExtraSize > 0)
{
waveFormat = MarshalHelpers.PtrToStructure <WaveFormatExtraData>(pointer);
}
break;
}
return(waveFormat);
}
public override void AddDependeciesDueToPInvoke(ref DependencyList dependencies, NodeFactory factory, MethodDesc method)
{
if (method.IsPInvoke && method.OwningType is MetadataType type && MarshalHelpers.IsRuntimeMarshallingEnabled(type.Module))
{
dependencies = dependencies ?? new DependencyList();
MethodSignature methodSig = method.Signature;
AddParameterMarshallingDependencies(ref dependencies, factory, method, methodSig.ReturnType);
for (int i = 0; i < methodSig.Length; i++)
{
AddParameterMarshallingDependencies(ref dependencies, factory, method, methodSig[i]);
}
}
if (method.HasInstantiation)
{
dependencies = dependencies ?? new DependencyList();
AddMarshalAPIsGenericDependencies(ref dependencies, factory, method);
}
}
/// <summary>
/// Determines if the specified output format is supported in shared mode
/// </summary>
/// <param name="shareMode">Share Mode</param>
/// <param name="desiredFormat">Desired Format</param>
/// <param name="closestMatchFormat">Output The closest match format.</param>
/// <returns>True if the format is supported</returns>
public bool IsFormatSupported(AudioClientShareMode shareMode, WaveFormat desiredFormat, out WaveFormatExtensible closestMatchFormat)
{
IntPtr pointerToPtr = GetPointerToPointer(); // IntPtr.Zero; // Marshal.AllocHGlobal(Marshal.SizeOf<WaveFormatExtensible>());
closestMatchFormat = null;
//int hresult = audioClientInterface.IsFormatSupported(shareMode, desiredFormat, pointerToPtr);
var pDesiredFormat = desiredFormat.AsInterop();
int hresult = audioClientInterface.IsFormatSupported(shareMode, ref pDesiredFormat, pointerToPtr);
var closestMatchPtr = MarshalHelpers.PtrToStructure <IntPtr>(pointerToPtr);
if (closestMatchPtr != IntPtr.Zero)
{
//closestMatchFormat = MarshalHelpers.PtrToStructure<WaveFormatExtensible>(closestMatchPtr);
closestMatchFormat = MarshalHelpers.PtrToStructure <WaveFormatExtensibleInterop>(closestMatchPtr);
Marshal.FreeCoTaskMem(closestMatchPtr);
}
Marshal.FreeHGlobal(pointerToPtr);
// S_OK is 0, S_FALSE = 1
if (hresult == 0)
{
// directly supported
return(true);
}
if (hresult == 1)
{
return(false);
}
if (hresult == (int)AudioClientErrors.UnsupportedFormat)
{
// Succeeded but the specified format is not supported in exclusive mode.
return(shareMode != AudioClientShareMode.Exclusive);
}
Marshal.ThrowExceptionForHR(hresult);
// shouldn't get here
throw new NotSupportedException("Unknown hresult " + hresult);
}
public static WaveFormat MarshalFromPtr(IntPtr pointer)
{
WaveFormat waveFormat = MarshalHelpers.PtrToStructure <WaveFormat>(pointer);
WaveFormatEncoding encoding = waveFormat.Encoding;
if (encoding <= WaveFormatEncoding.Adpcm)
{
if (encoding == WaveFormatEncoding.Pcm)
{
waveFormat.extraSize = 0;
return(waveFormat);
}
if (encoding == WaveFormatEncoding.Adpcm)
{
waveFormat = MarshalHelpers.PtrToStructure <AdpcmWaveFormat>(pointer);
return(waveFormat);
}
}
else
{
if (encoding == WaveFormatEncoding.Gsm610)
{
waveFormat = MarshalHelpers.PtrToStructure <Gsm610WaveFormat>(pointer);
return(waveFormat);
}
if (encoding == WaveFormatEncoding.Extensible)
{
waveFormat = MarshalHelpers.PtrToStructure <WaveFormatExtensible>(pointer);
return(waveFormat);
}
}
if (waveFormat.ExtraSize > 0)
{
waveFormat = MarshalHelpers.PtrToStructure <WaveFormatExtraData>(pointer);
}
return(waveFormat);
}
/// <summary>
/// Determines if the specified output format is supported in shared mode
/// </summary>
/// <param name="shareMode">Share Mode</param>
/// <param name="desiredFormat">Desired Format</param>
/// <param name="closestMatchFormat">Output The closest match format.</param>
/// <returns>True if the format is supported</returns>
public bool IsFormatSupported(AudioClientShareMode shareMode, WaveFormat desiredFormat, out WaveFormatExtensible closestMatchFormat)
{
IntPtr pointerToPtr = GetPointerToPointer(); // IntPtr.Zero; // Marshal.AllocHGlobal(Marshal.SizeOf<WaveFormatExtensible>());
closestMatchFormat = null;
int hresult = audioClientInterface.IsFormatSupported(shareMode, desiredFormat, pointerToPtr);
var closestMatchPtr = MarshalHelpers.PtrToStructure <IntPtr>(pointerToPtr);
if (closestMatchPtr != IntPtr.Zero)
{
closestMatchFormat = MarshalHelpers.PtrToStructure <WaveFormatExtensible>(closestMatchPtr);
Marshal.FreeCoTaskMem(closestMatchPtr);
}
Marshal.FreeHGlobal(pointerToPtr);
// S_OK is 0, S_FALSE = 1
if (hresult == 0)
{
// directly supported
return(true);
}
if (hresult == 1)
{
return(false);
}
if (hresult == (int)AudioClientErrors.UnsupportedFormat)
{
// documentation is confusing as to what this flag means
// https://docs.microsoft.com/en-us/windows/desktop/api/audioclient/nf-audioclient-iaudioclient-isformatsupported
// "Succeeded but the specified format is not supported in exclusive mode."
return(false); // shareMode != AudioClientShareMode.Exclusive;
}
Marshal.ThrowExceptionForHR(hresult);
// shouldn't get here
throw new NotSupportedException("Unknown hresult " + hresult);
}
private bool IsStubRequired()
{
MethodDesc method = _methodData.TargetMethod;
Debug.Assert(method.IsPInvoke);
if (MarshalHelpers.UseLazyResolution(method, _methodData.ImportMetadata.Module, _methodData.PInvokeILEmitterConfiguration))
{
return(true);
}
if ((_methodData.ImportMetadata.Attributes & PInvokeAttributes.SetLastError) == PInvokeAttributes.SetLastError)
{
return(true);
}
for (int i = 0; i < _marshallers.Length; i++)
{
if (_marshallers[i].IsMarshallingRequired())
{
return(true);
}
}
return(false);
}
private void EmitPInvokeCall(PInvokeILCodeStreams ilCodeStreams)
{
ILEmitter emitter = ilCodeStreams.Emitter;
ILCodeStream fnptrLoadStream = ilCodeStreams.FunctionPointerLoadStream;
ILCodeStream callsiteSetupCodeStream = ilCodeStreams.CallsiteSetupCodeStream;
TypeSystemContext context = _targetMethod.Context;
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
// if the SetLastError flag is set in DllImport, clear the error code before doing P/Invoke
if (_flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context).GetKnownMethod("ClearLastWin32Error", null)));
}
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
if (MarshalHelpers.UseLazyResolution(_targetMethod,
_importMetadata.Module,
_pInvokeILEmitterConfiguration))
{
MetadataType lazyHelperType = context.GetHelperType("InteropHelpers");
FieldDesc lazyDispatchCell = _interopStateManager.GetPInvokeLazyFixupField(_targetMethod);
fnptrLoadStream.Emit(ILOpcode.ldsflda, emitter.NewToken(lazyDispatchCell));
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(lazyHelperType
.GetKnownMethod("ResolvePInvoke", null)));
MethodSignatureFlags unmanagedCallConv = _flags.UnmanagedCallingConvention;
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags | unmanagedCallConv, 0, nativeReturnType,
nativeParameterTypes);
ILLocalVariable vNativeFunctionPointer = emitter.NewLocal(context
.GetWellKnownType(WellKnownType.IntPtr));
fnptrLoadStream.EmitStLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.EmitLdLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(nativeSig));
}
else
{
// Eager call
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags, 0, nativeReturnType, nativeParameterTypes);
MethodDesc nativeMethod =
new PInvokeTargetNativeMethod(_targetMethod, nativeSig);
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(nativeMethod));
}
// if the SetLastError flag is set in DllImport, call the PInvokeMarshal.
// SaveLastWin32Error so that last error can be used later by calling
// PInvokeMarshal.GetLastWin32Error
if (_flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context)
.GetKnownMethod("SaveLastWin32Error", null)));
}
}
public static IEnumerable <SyncUserHandle> GetAllLoggedInUsers()
{
return(MarshalHelpers.GetCollection <IntPtr>(NativeMethods.get_logged_in_users, bufferSize: 8)
.Select(h => new SyncUserHandle(h)));
}
private MethodIL EmitIL()
{
PInvokeILCodeStreams pInvokeILCodeStreams = new PInvokeILCodeStreams();
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
ILCodeStream fnptrLoadStream = pInvokeILCodeStreams.FunctionPointerLoadStream;
ILCodeStream callsiteSetupCodeStream = pInvokeILCodeStreams.CallsiteSetupCodeStream;
ILCodeStream unmarshallingCodestream = pInvokeILCodeStreams.UnmarshallingCodestream;
TypeSystemContext context = _targetMethod.Context;
// Marshal the arguments
for (int i = 0; i < _marshallers.Length; i++)
{
_marshallers[i].EmitMarshallingIL(pInvokeILCodeStreams);
}
// if the SetLastError flag is set in DllImport, clear the error code before doing P/Invoke
if (_importMetadata.Flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context).GetKnownMethod("ClearLastWin32Error", null)));
}
// make the call
DelegateMarshallingMethodThunk delegateMethod = _targetMethod as DelegateMarshallingMethodThunk;
if (delegateMethod != null)
{
EmitDelegateCall(delegateMethod, pInvokeILCodeStreams);
}
else
{
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
if (MarshalHelpers.UseLazyResolution(_targetMethod,
_importMetadata.Module,
_pInvokeILEmitterConfiguration))
{
MetadataType lazyHelperType = _targetMethod.Context.GetHelperType("InteropHelpers");
FieldDesc lazyDispatchCell = new PInvokeLazyFixupField(_targetMethod);
fnptrLoadStream.Emit(ILOpcode.ldsflda, emitter.NewToken(lazyDispatchCell));
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(lazyHelperType
.GetKnownMethod("ResolvePInvoke", null)));
MethodSignatureFlags unmanagedCallConv = _importMetadata.Flags.UnmanagedCallingConvention;
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags | unmanagedCallConv, 0, nativeReturnType,
nativeParameterTypes);
ILLocalVariable vNativeFunctionPointer = emitter.NewLocal(_targetMethod.Context
.GetWellKnownType(WellKnownType.IntPtr));
fnptrLoadStream.EmitStLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.EmitLdLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(nativeSig));
}
else
{
// Eager call
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags, 0, nativeReturnType, nativeParameterTypes);
MethodDesc nativeMethod =
new PInvokeTargetNativeMethod(_targetMethod, nativeSig);
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(nativeMethod));
}
}
// if the SetLastError flag is set in DllImport, call the PInvokeMarshal.
// SaveLastWin32Error so that last error can be used later by calling
// PInvokeMarshal.GetLastWin32Error
if (_importMetadata.Flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context)
.GetKnownMethod("SaveLastWin32Error", null)));
}
unmarshallingCodestream.Emit(ILOpcode.ret);
return(new PInvokeILStubMethodIL((ILStubMethodIL)emitter.Link(_targetMethod),
IsStubRequired()));
}
private IntPtr GetPointerToPointer()
{
return(Marshal.AllocHGlobal(MarshalHelpers.SizeOf <IntPtr>()));
}
public IEnumerable <SyncUserHandle> GetAllLoggedInUsers()
{
return(MarshalHelpers.GetCollection((IntPtr[] buf, IntPtr len, out NativeException ex) => NativeMethods.get_logged_in_users(this, buf, len, out ex), bufferSize: 8)
.Select(h => new SyncUserHandle(h)));
}