audiostream.h

driver wdk

//
//File name: AudioStream.h
//This file contains code to handle audio interface of SAA7146
#ifndef _AUDIOSTREAM_H
#define _AUDIOSTREAM_H
//Definition of constants
#define NUMOFAUDIODESCRIPTOR 200
#pragma pack(push,1)
typedef struct {
	UCHAR CDSync[12];
	UCHAR CDHeader[4];
	UCHAR CDSubHeader[8];
	UCHAR MPEGData[2324];
	UCHAR CDQuality[4];
}AUDIOSTREAMSECTOR, *PAUDIOSTREAMSECTOR;
#pragma pack(pop)

typedef struct {
	unsigned int ownbit:1;
	unsigned int bufferlen:12;
	unsigned int datalen:12;
	unsigned int :0;
}AUDIODESPFLAG, *PAUDIODESPFLAG;

typedef struct __AUDIODESP{           //Audio stream buffer descriptor
	AUDIODESPFLAG Flags;
	struct __AUDIODESP *pNext;
	PUCHAR pData;
	ULONG Dummy;  //Fulfill alignment requirement
}AUDIODESP, *PAUDIODESP;

typedef struct {
	PAUDIODESP pHead;
	PAUDIODESP pReadPointer;
	PAUDIODESP pWritePointer;
	ULONG Dummy;
}AUDIODESPLIST, *PAUDIODESPLIST;

//Interface functions
BOOLEAN InitAudioDespList(PAUDIODESPLIST pAudioDespList, PVOID Buffer, 
                                                 PAUDIODESP pDespBuf,ULONG NumOfDesp);
BOOLEAN SyncAudioRead(PVOID SynchronizeContext);
BOOLEAN SyncAudioWrite(PVOID SynchronizeContext);

BOOLEAN SyncChannel2Read(PVOID SynchronizeContext);
BOOLEAN SyncChannel2Write(PVOID SynchronizeContext);

//PDEVICE_EXTENSION pDE);//,
#endif //_AUDIOSTREAM_H