mirror of
https://github.com/coop-deluxe/sm64coopdx.git
synced 2024-11-29 07:23:01 +00:00
57 lines
1.7 KiB
Text
57 lines
1.7 KiB
Text
|
afSeekFrame(3)
|
||
|
|
==============
|
||
|
|
|
||
|
|
NAME
|
||
|
|
----
|
||
|
|
afSeekFrame, afTellFrame - update or access the current sample frame
|
||
|
|
position for a track in an audio file
|
||
|
|
|
||
|
|
SYNOPSIS
|
||
|
|
--------
|
||
|
|
#include <audiofile.h>
|
||
|
|
|
||
|
|
AFframecount afSeekFrame(AFfilehandle file, int track,
|
||
|
|
AFframecount frameOffset);
|
||
|
|
|
||
|
|
AFframecount afTellFrame(AFfilehandle file, int track);
|
||
|
|
|
||
|
|
PARAMETERS
|
||
|
|
----------
|
||
|
|
'file' is a valid audio file handle created by linkaf:afOpenFile[3].
|
||
|
|
|
||
|
|
'track' identifies an audio track within the file. `track` is always
|
||
|
|
`AF_DEFAULT_TRACK` for all currently supported audio file formats.
|
||
|
|
|
||
|
|
'frameOffset' is a sample frame offset. Valid sample frame offsets must
|
||
|
|
be greater than or equal to zero and strictly less than the number of
|
||
|
|
sample frames contained within the specified audio track. The special
|
||
|
|
value `-1` is also allowed.
|
||
|
|
|
||
|
|
DESCRIPTION
|
||
|
|
-----------
|
||
|
|
`afSeekFrame` moves the logical file position for a specified audio
|
||
|
|
track to a desired sample frame location. If `frameOffset` is `-1`,
|
||
|
|
`afSeekFrame` will not modify the current file offset and will instead
|
||
|
|
return the current file position.
|
||
|
|
|
||
|
|
`afTellFrame` returns current file position in sample frames.
|
||
|
|
|
||
|
|
RETURN VALUE
|
||
|
|
------------
|
||
|
|
On success, `afSeekFrame` and `afTellFrame` will return the current file
|
||
|
|
position as measured in sample frames from the start of the audio
|
||
|
|
track. On failure, `afSeekFrame` and `afTellFrame` will return the value
|
||
|
|
`-1`.
|
||
|
|
|
||
|
|
ERRORS
|
||
|
|
------
|
||
|
|
The following errors can be generated by `afSeekFrame` or `afTellFrame`:
|
||
|
|
|
||
|
|
`AF_BAD_FILEHANDLE`:: `file` does not represent a valid file handle.
|
||
|
|
`AF_BAD_TRACK`:: `track` does not identify a valid track.
|
||
|
|
`AF_BAD_LSEEK`:: A call to `lseek` failed.
|
||
|
|
|
||
|
|
AUTHOR
|
||
|
|
------
|
||
|
|
Michael Pruett <michael@68k.org>
|