diff options
author | Pierre Ossman <ossman@cendio.se> | 2006-02-26 17:57:58 +0000 |
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committer | Pierre Ossman <ossman@cendio.se> | 2006-02-26 17:57:58 +0000 |
commit | b125e1c9d579d47865fb0e4015b8e1f2d15b152b (patch) | |
tree | a3bbbe506653c2401f7168805db968e3022d1099 /src/modules/alsa-util.c | |
parent | c5ec39d87f01716f0d4bb0c577c8d4e6d19ac665 (diff) |
Hardware volume support in ALSA modules.
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@604 fefdeb5f-60dc-0310-8127-8f9354f1896f
Diffstat (limited to 'src/modules/alsa-util.c')
-rw-r--r-- | src/modules/alsa-util.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/modules/alsa-util.c b/src/modules/alsa-util.c index 1b254f51..4e1db545 100644 --- a/src/modules/alsa-util.c +++ b/src/modules/alsa-util.c @@ -128,3 +128,42 @@ void pa_free_io_events(pa_mainloop_api* m, pa_io_event **io_events, unsigned n_i m->io_free(*ios); pa_xfree(io_events); } + +int pa_alsa_prepare_mixer(snd_mixer_t *mixer, const char *dev) { + int err; + + assert(mixer && dev); + + if ((err = snd_mixer_attach(mixer, dev)) < 0) { + pa_log_warn(__FILE__": Unable to attach to mixer %s: %s", dev, snd_strerror(err)); + return -1; + } + + if ((err = snd_mixer_selem_register(mixer, NULL, NULL)) < 0) { + pa_log_warn(__FILE__": Unable to register mixer: %s", snd_strerror(err)); + return -1; + } + + if ((err = snd_mixer_load(mixer)) < 0) { + pa_log_warn(__FILE__": Unable to load mixer: %s", snd_strerror(err)); + return -1; + } + + return 0; +} + +snd_mixer_elem_t *pa_alsa_find_elem(snd_mixer_t *mixer, const char *name) { + snd_mixer_elem_t *elem; + snd_mixer_selem_id_t *sid; + snd_mixer_selem_id_alloca(&sid); + + assert(mixer && name); + + snd_mixer_selem_id_set_name(sid, name); + + elem = snd_mixer_find_selem(mixer, sid); + if (!elem) + pa_log_warn(__FILE__": Cannot find mixer control %s", snd_mixer_selem_id_get_name(sid)); + + return elem; +} |