Manual Pages for UNIX Operating System command usage for man audio_engine_count

Driver Entry Points                        audio_engine_count(9E)



NAME
     audio_engine_count - return the sample count  for  an  audio
     engine

SYNOPSIS
     #include 

     uint64_t prefix_count(void *state);


PARAMETERS
     state    pointer to driver supplied soft state


INTERFACE LEVEL
     Solaris DDI specific (Solaris DDI)

DESCRIPTION
     The audio_engine_count() function returns the frame count of
     the engine, which is the number of frames transferred by the
     engine since it was last opened with audio_engine_open(9E).


     For recording, this frame count will be the total number  of
     frames  that  the  engine  has  written into the buffer. For
     playback, it will be the number of frames  that  the  engine
     has  read  from  the  buffer.  This  value  is monotonically
     increasing and does not wrap.


     The audio_engine_open() function, however,  will  reset  the
     frame count to 0.


     The frame count for the engine is related to the  offset  of
     the data in the buffer. Both normally increase as the engine
     makes progress, but the engine index wraps when  it  reaches
     the end of the buffer or when the device is stopped and res-
     tarted        with         audio_engine_stop(9E)         and
     audio_engine_start(9E).

RETURN VALUES
     The audio_engine_count()  function  returns  the  number  of
     frames  transferred  by the engine since audio_engine_open()
     was called.

CONTEXT
     This function may be called from user or interrupt context.

ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



SunOS 5.11          Last change: 16 Apr 2010                    1






Driver Entry Points                        audio_engine_count(9E)



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|


SEE ALSO
     attributes(5),       audio(7D),       audio_engine_open(9E),
     audio_engine_start(9E),               audio_engine_stop(9E),
     audio_engine_ops(9S)












































SunOS 5.11          Last change: 16 Apr 2010                    2