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/*++
Copyright (c) Microsoft Corporation All Rights Reserved
Module Name:
ToneGenerator.h
Abstract:
Declaration of a generic sine wave generator.
--*/
#ifndef _SAMPLE_TONEGENERATOR_H
#define _SAMPLE_TONEGENERATOR_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;
double m_ToneAmplitude;
double m_ToneDCOffset;
public:
__drv_maxIRQL(PASSIVE_LEVEL)
__declspec(code_seg("PAGE"))
ToneGenerator();
__drv_maxIRQL(PASSIVE_LEVEL)
__declspec(code_seg("PAGE"))
~ToneGenerator();
__drv_maxIRQL(PASSIVE_LEVEL)
__declspec(code_seg("PAGE"))
NTSTATUS
Init
(
_In_ DWORD ToneFrequency,
_In_ double ToneAmplitude,
_In_ double ToneDCOffset,
_In_ double ToneInitialPhase,
_In_ PWAVEFORMATEXTENSIBLE WfExt
);
__drv_maxIRQL(PASSIVE_LEVEL)
__declspec(code_seg("PAGE"))
NTSTATUS
Init
(
_In_ DWORD ToneFrequency,
_In_ PWAVEFORMATEXTENSIBLE WfExt
);
__drv_maxIRQL(DISPATCH_LEVEL)
#pragma code_seg()
VOID
GenerateSine
(
_Out_writes_bytes_(BufferLength) BYTE *Buffer,
_In_ size_t BufferLength
);
__drv_maxIRQL(PASSIVE_LEVEL)
__declspec(code_seg("PAGE"))
VOID
SetMute
(
_In_ bool Value
)
{
m_Mute = Value;
}
private:
__drv_maxIRQL(DISPATCH_LEVEL)
#pragma code_seg()
VOID InitNewFrame
(
_Out_writes_bytes_(FrameSize) BYTE* Frame,
_In_ DWORD FrameSize
);
};
#endif // _SAMPLE_TONEGENERATOR_H
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