#include <IOKit/audio/IOAudioDebug.h>
IOKit/audio/IOAudioDebug.h
<rdar://problem/9725460>
macroDEBUG_LEVEL
#define DEBUG_LEVEL 3
macroaudioDebugIOLog
#define audioDebugIOLog(level, message, ...) do { if ( __builtin_expect(level <= DEBUG_LEVEL, 0) ) { os_log( OS_LOG_DEFAULT, message ); } } while (0)macroaudioErrorIOLog
#define audioErrorIOLog(message, ...) do { os_log_error( OS_LOG_DEFAULT, message ); IOLog( message );} while (0)