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Add mixer_device configuration file option for ALSA

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Support a separate mixer_device configuration file option for
advanced ALSA configurations. Previously, ALSA local output
happened to work becasue "default" is valid as both a PCM and a
mixer. Now you can separately specify the device name for PCM
output and mixer operations.

In my setup, I am using the following setup:
card = "default:CARD=NVidia"
mixer = "Front"
mixer_device = "hw:CARD=NVidia"
This commit is contained in:
Pat Coulthard
2016-09-25 15:10:22 -05:00
parent ac290b8b65
commit ae79800493
3 changed files with 11 additions and 2 deletions
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1
src/conffile.c
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@@ -99,6 +99,7 @@ static cfg_opt_t sec_audio[] =
CFG_STR("type", NULL, CFGF_NONE),
CFG_STR("card", "default", CFGF_NONE),
CFG_STR("mixer", NULL, CFGF_NONE),
CFG_STR("mixer_device", NULL, CFGF_NONE),
CFG_INT("offset", 0, CFGF_NONE),
CFG_END()
};

6
src/outputs/alsa.c
View File

@@ -49,6 +49,7 @@
// TODO Unglobalise these and add support for multiple sound cards
static char *card_name;
static char *mixer_name;
static char *mixer_device_name;
static snd_pcm_t *hdl;
static snd_mixer_t *mixer_hdl;
static snd_mixer_elem_t *vol_elem;
@@ -316,7 +317,7 @@ mixer_open(void)
return -1;
}
ret = snd_mixer_attach(mixer_hdl, card_name);
ret = snd_mixer_attach(mixer_hdl, mixer_device_name);
if (ret < 0)
{
DPRINTF(E_LOG, L_LAUDIO, "Failed to attach mixer: %s\n", snd_strerror(ret));
@@ -989,6 +990,9 @@ alsa_init(void)
card_name = cfg_getstr(cfg_audio, "card");
mixer_name = cfg_getstr(cfg_audio, "mixer");
mixer_device_name = cfg_getstr(cfg_audio, "mixer_device");
if (mixer_device_name == NULL || strlen(mixer_device_name) == 0)
mixer_device_name = card_name;
nickname = cfg_getstr(cfg_audio, "nickname");
offset = cfg_getint(cfg_audio, "offset");
if (abs(offset) > 44100)