NAME
ossaudio —
OSS audio emulation
LIBRARY
OSS Audio Emulation Library (libossaudio, -lossaudio)
SYNOPSIS
#include <soundcard.h>
DESCRIPTION
The
ossaudio library provides an emulation of the OSS (Linux)
audio interface.
Use the native interface for new programs and the emulation library only for
porting programs.
Mixer Control Map
The following table summarizes the mappings from native interface device names
to OSS mixer controls.
Native Device Name |
OSS Mixer Control |
*.mic |
SOUND_MIXER_MIC |
*.line |
SOUND_MIXER_LINE |
*.cd |
SOUND_MIXER_CD |
*.dac |
SOUND_MIXER_PCM |
*.aux |
SOUND_MIXER_LINE1 |
*.record |
SOUND_MIXER_IMIX |
*.master |
SOUND_MIXER_VOLUME |
*.treble |
SOUND_MIXER_TREBLE |
*.bass |
SOUND_MIXER_BASS |
*.speaker |
SOUND_MIXER_SPEAKER |
*.output |
SOUND_MIXER_OGAIN |
*.input |
SOUND_MIXER_IGAIN |
*.fmsynth |
SOUND_MIXER_SYNTH |
*.midi |
SOUND_MIXER_SYNTH |
SEE ALSO
audio(4),
midi(4)
HISTORY
The
ossaudio library first appeared in
NetBSD
1.3.
BUGS
The emulation uses a #define for
ioctl() so some obscure
programs can fail to compile.
The emulation is incomplete.
The emulation only covers
ioctl(), there are other differences
as well. E.g., on a write that would block in non-blocking mode Linux returns
EINTR
whereas
NetBSD 1.3
returns
EAGAIN
.