1 files changed, 88 insertions, 0 deletions
diff --git a/audio/Acx/Samples/Common/ToneGenerator.h b/audio/Acx/Samples/Common/ToneGenerator.h
new file mode 100644
index 00000000..9de138f8
--- /dev/null
+++ b/audio/Acx/Samples/Common/ToneGenerator.h
@@ -0,0 +1,88 @@
+/*++
+
+Copyright (c) Microsoft Corporation.  All rights reserved.
+
+    THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
+    KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
+    PURPOSE.
+
+Module Name:
+
+    ToneGenerator.h
+
+Abstract:
+
+    Declaration of sine wave generator for ACX driver samples.
+
+
+--*/
+#pragma once
+
+#define _USE_MATH_DEFINES
+#include <math.h>
+#include <limits.h>
+
+class ToneGenerator
+{
+public:
+    DWORD           m_Frequency; 
+    WORD            m_ChannelCount; 
+    WORD            m_BitsPerSample;
+    DWORD           m_SamplesPerSecond;
+    double          m_Theta;
+    double          m_SampleIncrement;  
+    bool            m_Mute;
+    BYTE*           m_PartialFrame;
+    DWORD           m_PartialFrameBytes;
+    DWORD           m_FrameSize;
+
+public:
+    __drv_maxIRQL(PASSIVE_LEVEL)
+    PAGED_CODE_SEG
+    ToneGenerator();
+
+    __drv_maxIRQL(PASSIVE_LEVEL)
+    PAGED_CODE_SEG
+    ~ToneGenerator();
+    
+    __drv_maxIRQL(PASSIVE_LEVEL)
+    PAGED_CODE_SEG
+    NTSTATUS
+    Init
+    (
+        _In_    DWORD                   ToneFrequency, 
+        _In_    PWAVEFORMATEXTENSIBLE   WfExt
+    );
+    
+    __drv_maxIRQL(DISPATCH_LEVEL)
+    VOID
+    GenerateSine
+    (
+        _Out_writes_bytes_(BufferLength) BYTE       *Buffer, 
+        _In_                             size_t      BufferLength
+    );
+
+    __drv_maxIRQL(PASSIVE_LEVEL)
+    PAGED_CODE_SEG
+    VOID
+    SetMute
+    (
+        _In_ bool Value
+    )
+    {
+        PAGED_CODE();
+
+        m_Mute = Value;
+    }
+
+private:
+    __drv_maxIRQL(DISPATCH_LEVEL)
+    VOID InitNewFrame
+    (
+        _Out_writes_bytes_(FrameSize)   BYTE*  Frame, 
+        _In_                            DWORD  FrameSize
+    );
+};
+
+