Re: sox src/coreaudio device name truncation fix

[gqrxzy8974@ftml.net]

> Seems reasonable.  Can you test this?
> (or provide at least provide a documentation reference).

The  AudioDeviceGetProperty function is documented in the
CoreAudio header file AudioHardwareDeprecated.h and it is
very clear that property_size needs to be the size of the
receiving area on the call and gets set to the length of the
data returned by the call.

 @function       AudioDeviceGetProperty
    @abstract       Queries an the AudioDevice object to get the data of
    the given property and
                    places it in the provided buffer.
    @discussion     Note that the same functionality is provided by the
    function
                    AudioObjectGetPropertyData().
    @param          inDevice
                        The AudioDevice to query.
    @param          inChannel
                        The channel of the property to query where 0 is
                        the master channel.
    @param          isInput
                        Which section of the AudioDevice to query.
    @param          inPropertyID
                        The AudioDevicePropertyID of the property to
                        query.
    @param          ioPropertyDataSize
                        A UInt32 which on entry indicates the size of
                        the buffer pointed to by
                        outData and on exit indicates how much of the
                        buffer was used.
    @param          outPropertyData
                        The buffer into which the object will put the
                        data for the given property.
    @result         An OSStatus indicating success or failure.
*/
extern OSStatus
AudioDeviceGetProperty( AudioDeviceID           inDevice,
                        UInt32                  inChannel,
                        Boolean                 isInput,
                        AudioDevicePropertyID   inPropertyID,
                        UInt32*                 ioPropertyDataSize,
                        void*                   outPropertyData)         

PS: Changing from using the deprecated CoreAudio interfaces would be a
larger change...

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