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unify ALSA mixer initialization

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This commit is contained in:
Lennart Poettering 2009-02-14 00:21:36 +01:00
parent 023998e3c8
commit 6790c03f91
4 changed files with 83 additions and 74 deletions
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38
src/modules/alsa/alsa-sink.c
View file

@ -1386,43 +1386,7 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
/* ALSA might tweak the sample spec, so recalculate the frame size */
frame_size = pa_frame_size(&ss);
if ((err = snd_mixer_open(&u->mixer_handle, 0)) < 0)
pa_log_warn("Error opening mixer: %s", snd_strerror(err));
else {
pa_bool_t found = FALSE;
if (pa_alsa_prepare_mixer(u->mixer_handle, u->device_name) >= 0)
found = TRUE;
else {
snd_pcm_info_t *info;
snd_pcm_info_alloca(&info);
if (snd_pcm_info(u->pcm_handle, info) >= 0) {
char *md;
int card_idx;
if ((card_idx = snd_pcm_info_get_card(info)) >= 0) {
md = pa_sprintf_malloc("hw:%i", card_idx);
if (strcmp(u->device_name, md))
if (pa_alsa_prepare_mixer(u->mixer_handle, md) >= 0)
found = TRUE;
pa_xfree(md);
}
}
}
if (found)
if (!(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "Master", "PCM", TRUE)))
found = FALSE;
if (!found) {
snd_mixer_close(u->mixer_handle);
u->mixer_handle = NULL;
}
}
pa_alsa_find_mixer_and_elem(u->pcm_handle, &u->mixer_handle, &u->mixer_elem);
pa_sink_new_data_init(&data);
data.driver = driver;

38
src/modules/alsa/alsa-source.c
View file

@ -1211,43 +1211,7 @@ pa_source *pa_alsa_source_new(pa_module *m, pa_modargs *ma, const char*driver, p
/* ALSA might tweak the sample spec, so recalculate the frame size */
frame_size = pa_frame_size(&ss);
if ((err = snd_mixer_open(&u->mixer_handle, 0)) < 0)
pa_log("Error opening mixer: %s", snd_strerror(err));
else {
pa_bool_t found = FALSE;
if (pa_alsa_prepare_mixer(u->mixer_handle, u->device_name) >= 0)
found = TRUE;
else {
snd_pcm_info_t* info;
snd_pcm_info_alloca(&info);
if (snd_pcm_info(u->pcm_handle, info) >= 0) {
char *md;
int card_idx;
if ((card_idx = snd_pcm_info_get_card(info)) >= 0) {
md = pa_sprintf_malloc("hw:%i", card_idx);
if (strcmp(u->device_name, md))
if (pa_alsa_prepare_mixer(u->mixer_handle, md) >= 0)
found = TRUE;
pa_xfree(md);
}
}
}
if (found)
if (!(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "Capture", "Mic", FALSE)))
found = FALSE;
if (!found) {
snd_mixer_close(u->mixer_handle);
u->mixer_handle = NULL;
}
}
pa_alsa_find_mixer_and_elem(u->pcm_handle, &u->mixer_handle, &u->mixer_elem);
pa_source_new_data_init(&data);
data.driver = driver;

80
src/modules/alsa/alsa-util.c
View file

@ -1057,6 +1057,86 @@ success:
return elem;
}
int pa_alsa_find_mixer_and_elem(
snd_pcm_t *pcm,
snd_mixer_t **_m,
snd_mixer_elem_t **_e) {
int err;
snd_mixer_t *m;
snd_mixer_elem_t *e;
pa_bool_t found = FALSE;
const char *dev;
pa_assert(pcm);
pa_assert(_m);
pa_assert(_e);
if ((err = snd_mixer_open(&m, 0)) < 0) {
pa_log("Error opening mixer: %s", snd_strerror(err));
return -1;
}
/* First, try by name */
if ((dev = snd_pcm_name(pcm)))
if (pa_alsa_prepare_mixer(m, dev) >= 0)
found = TRUE;
/* Then, try by card index */
if (!found) {
snd_pcm_info_t* info;
snd_pcm_info_alloca(&info);
if (snd_pcm_info(pcm, info) >= 0) {
char *md;
int card_idx;
if ((card_idx = snd_pcm_info_get_card(info)) >= 0) {
md = pa_sprintf_malloc("hw:%i", card_idx);
if (!dev || !pa_streq(dev, md))
if (pa_alsa_prepare_mixer(m, md) >= 0)
found = TRUE;
pa_xfree(md);
}
}
}
if (!found) {
snd_mixer_close(m);
return -1;
}
switch (snd_pcm_stream(pcm)) {
case SND_PCM_STREAM_PLAYBACK:
e = pa_alsa_find_elem(m, "Master", "PCM", TRUE);
break;
case SND_PCM_STREAM_CAPTURE:
e = pa_alsa_find_elem(m, "Capture", "Mic", FALSE);
break;
default:
pa_assert_not_reached();
}
if (!e) {
snd_mixer_close(m);
return -1;
}
pa_assert(e && m);
*_m = m;
*_e = e;
return 0;
}
static const snd_mixer_selem_channel_id_t alsa_channel_ids[PA_CHANNEL_POSITION_MAX] = {
[PA_CHANNEL_POSITION_MONO] = SND_MIXER_SCHN_MONO, /* The ALSA name is just an alias! */

1
src/modules/alsa/alsa-util.h
View file

@ -54,6 +54,7 @@ int pa_alsa_set_sw_params(snd_pcm_t *pcm, snd_pcm_uframes_t avail_min);
int pa_alsa_prepare_mixer(snd_mixer_t *mixer, const char *dev);
snd_mixer_elem_t *pa_alsa_find_elem(snd_mixer_t *mixer, const char *name, const char *fallback, pa_bool_t playback);
int pa_alsa_find_mixer_and_elem(snd_pcm_t *pcm, snd_mixer_t **_m, snd_mixer_elem_t **_e);
typedef struct pa_alsa_profile_info {
pa_channel_map map;