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Format of WAVE Audio Services structure

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Offset Size Description

00h

4 BYTEs

 name of the structure

04h

DWORD

 structure length

08h

16 BYTEs

 for future expansion

entry points (details ???)

18h

DWORD

 DeviceCheck
11h compression (see also #00117)
12h driver state
13h get current pos
14h sample rate
15h set preference
16h get DMA, IRQ
17h get IO address
18h get mem address
19h get mem free
1Ah full duplex
1Bh get block size
1Ch get PCM format
1Dh enable PCM format
80h - ... vendors can add DevChks above 0x80

1Ch

DWORD

 PCMInfo

20h

DWORD

 PlayBlock

24h

DWORD

 PlayCont

28h

DWORD

 RecordBlock

2Ch

DWORD

 RecordCont

30h

DWORD

 PauseIO

34h

DWORD

 ResumeIO

38h

DWORD

 StopIO

3Ch

DWORD

 WavePrepare

40h

DWORD

 WaveRegister

44h

DWORD

 GetLastError
01h unsupported feature/function
02h bad sample rate
03h bad block length
04h bad block address
05h app. missed an IRQ
06h don't understand the PCM size/format
80h - ... vendors specific errors

48h

DWORD

 TimerTick

4Ch

DWORD

 ApplPSyncCB: CallBack: play filled in by the application

50h

DWORD

 ApplRSyncCB: CallBack: rec filled in by the application

See Also:

#00120,#00124