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Diffstat (limited to 'misc/man9ossddk/ossddk_dmap_get_buffused.9ossddk')
| -rw-r--r-- | misc/man9ossddk/ossddk_dmap_get_buffused.9ossddk | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/misc/man9ossddk/ossddk_dmap_get_buffused.9ossddk b/misc/man9ossddk/ossddk_dmap_get_buffused.9ossddk new file mode 100644 index 0000000..d33001c --- /dev/null +++ b/misc/man9ossddk/ossddk_dmap_get_buffused.9ossddk @@ -0,0 +1,46 @@ +'\" te +.\" Copyright (c) 2005, 4Front Technologies 2005\&. +.TH ossddk_dmap_get_buffused 9ossddk "12 Sep 2005" "SunOS 5.10" "OSS DDK Services" +.SH "NAME" +ossddk_dmap_get_buffused \- Returns the size of buffer that is actually in use +.PP +.SH "SYNOPSIS" +.nf +#include <sys/soundcard.h> +.LP +#include <sys/ossddk/ossddk.h> +.fi +.LP +\fBint\fR ossddk_dmap_get_buffused(\fBdmap_t *\fIdmap\fP); +.PP +.SH "INTERFACE LEVEL" +.PP +Open Sound System specific (OSS 4.0 DDK)\&. +.PP +.SH "ARGUMENTS" +.PP +.sp +.ne 2 +.mk +\fB\fIdmap\fR +.in +16n +.rt +Audio buffer handle. +.in -16n +.PP +.SH "DESCRIPTION" +.PP +OSS audio devices have a DMA buffer with the maximum size returned by +\fIossddk_dmap_get_buffsize\fR. However in most cases just part of the available +buffer is actually in use. The driver can call \fIossddk_dmap_get_buffused\fR +to find out the transfer count to be programmed in the device registers. +.PP +.SH "RETURN VALUES" +Amount of buffer currently in use (in bytes). This value equals to +fragment_size*num_fragments. +.PP +.SH "SEE ALSO" +.PP +\fIWriting Sound Device Drivers with OSS DDK\fR +.LP +\fIOpen Sound System Programmer's Guide\fR |