APTR handle = StartAudioCapture(int frequency, int channels, int bits,
struct hwTagList *tags);
HWEXT_AUDIOADAPTER_CAPTURE
extension bit has been set. See Extension plugins for details. In that case, it
must put the audio hardware in capture mode. Hollywood will pass the capture audio format
in the frequency, channels, and bits parameters to this function. The function must
return a handle that identifies this capture operation. Hollywood will then pass this
handle to GetAudioCapture() to get the captured samples and to StopAudioCapture()
to stop the capture.
If your plugin can't put the audio hardware in capture mode or there is another problem,
you must return NULL.
Note that if you want Hollywood to call this function, you also must set
the HWSAAFLAGS_CAPTURE flag in your call to hw_SetAudioAdapter().
See hw_SetAudioAdapter for details.
NULL currentlyNULL on error