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Inside Macintosh: Sound /
Chapter 3 - Sound Input Manager / Sound Input Manager Reference
Sound Input Manager Routines / Manipulating Device Settings


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Important: Inside Macintosh: Sound is deprecated as of Mac OS X v10.5. For new audio development in Mac OS X, use Core Audio. See the Audio page in the ADC Reference Library.

SPBGetDeviceInfo

You can use the SPBGetDeviceInfo function to get information about the settings of a sound input device.

FUNCTION SPBGetDeviceInfo (inRefNum: LongInt; infoType: OSType;
                              infoData: Ptr): OSErr;
inRefNum
The device reference number of the sound input device, as obtained from the SPBOpenDevice function.
infoType
A sound input device information selector that specifies the type of information you need.
infoData
A pointer to a buffer in which information should be returned. This buffer must be large enough for the type of information specified in the infoType parameter.
DESCRIPTION
The SPBGetDeviceInfo function returns information about the sound input device specified by the inRefNum parameter. The type of information you want is specified in the infoType parameter. The available sound input device information selectors are listed in "Sound Input Device Information Selectors" beginning on page 3-18. The information is copied into the buffer specified by the infoData parameter.

SPECIAL CONSIDERATIONS
Because the SPBGetDeviceInfo function might move memory, you should not call it at interrupt time. Check the selector description of the selector you want to use to see if it moves memory before calling the SPBGetDeviceInfo function. Most of the selectors do not move memory and are therefore safe to use at interrupt time.

ASSEMBLY-LANGUAGE INFORMATION
The trap macro and routine selector for the SPBGetDeviceInfo function are
Trap macroSelector
_SoundDispatch$06380014

RESULT CODES
noErr0No error
siBadSoundInDevice-221Invalid sound input device
siUnknownInfoType-231Unknown type of information
SEE ALSO
Listing 3-2 on page 3-12 shows an example that uses the SPBGetDeviceInfo function to get the name of a sound input device driver.


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© Apple Computer, Inc.
2 JUL 1996