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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