Audio input devices iterator.
If d is NULL, returns the first registered input audio/video device, if d is non-NULL, returns the next registered input audio/video device after d or NULL if d is the last one.
See Implementation
Audio input devices iterator.
If d is NULL, returns the first registered input audio/video device, if d is non-NULL, returns the next registered input audio/video device after d or NULL if d is the last one.