static MSSndCard * alsa_card_new(int id)
{
MSSndCard * obj;
char *name=NULL;
AlsaData *ad;
int err;
if (id!=-1){
err=snd_card_get_name(id,&name);
if (err<0) {
return NULL;
}
}
obj=ms_snd_card_new(&alsa_card_desc);
ad=(AlsaData*)obj->data;
if (id==-1) {
/* the default pcm device */
obj->name=ms_strdup("default device");
ad->pcmdev=ms_strdup("default");
ad->mixdev=ms_strdup("default");
}else{
/* remove trailing spaces from card name */
char *pos1, *pos2;
pos1=ms_strdup(name);
pos2=pos1+strlen(pos1)-1;
for (; pos2>pos1 && *pos2==' '; pos2--) *pos2='\0';
obj->name=pos1;
ad->pcmdev=ms_strdup_printf("default:%i",id);
ad->mixdev=ms_strdup_printf("default:%i",id);
{
snd_mixer_t *mixer;
mixer = alsa_mixer_open(ad->mixdev);
if (mixer==NULL) {
ms_free(ad->mixdev);
ad->mixdev=ms_strdup_printf("hw:%i",id);
} else {
alsa_mixer_close(mixer);
}
}
}
/*check card capabilities: */
obj->capabilities=get_card_capabilities(ad->pcmdev);
if (obj->capabilities==0){
ms_warning("Strange, sound card %s does not seems to be capable of anything, retrying with plughw...",obj->name);
/*retry with plughw: this workarounds an alsa bug*/
ms_free(ad->pcmdev);
ad->pcmdev=ms_strdup_printf("plughw:%i",id);
obj->capabilities=get_card_capabilities(ad->pcmdev);
if (obj->capabilities==0){
ms_warning("Strange, sound card %s seems totally unusable.",obj->name);
}
}
free(name);
/*ms_message("alsa device %s found",obj->name);*/
return obj;
}
static void alsa_card_set_source(MSSndCard *obj,MSSndCardCapture source)
{
snd_mixer_t *mixer;
AlsaData *ad=(AlsaData*)obj->data;
mixer=alsa_mixer_open(ad->mixdev);
if (mixer==NULL) return;
switch (source){
case MS_SND_CARD_MIC:
set_mixer_element(mixer,"Mic",1,CAPTURE_SWITCH);
set_mixer_element(mixer,"Capture",1,CAPTURE_SWITCH);
break;
case MS_SND_CARD_LINE:
set_mixer_element(mixer,"Line",1,CAPTURE_SWITCH);
set_mixer_element(mixer,"Capture",1,CAPTURE_SWITCH);
break;
}
alsa_mixer_close(mixer);
}
static void alsa_card_set_level(MSSndCard *obj,MSSndCardMixerElem e,int a)
{
snd_mixer_t *mixer;
AlsaData *ad=(AlsaData*)obj->data;
mixer=alsa_mixer_open(ad->mixdev);
if (mixer==NULL) return ;
switch(e){
case MS_SND_CARD_MASTER:
set_mixer_element(mixer,"Master",a,PLAYBACK);
break;
case MS_SND_CARD_CAPTURE:
set_mixer_element(mixer,"Capture",a,CAPTURE);
break;
case MS_SND_CARD_PLAYBACK:
set_mixer_element(mixer,"PCM",a,PLAYBACK);
break;
default:
ms_warning("alsa_card_set_level: unsupported command.");
}
alsa_mixer_close(mixer);
}
static bool
alsa_mixer_open(struct mixer *data, GError **error_r)
{
struct alsa_mixer *am = (struct alsa_mixer *)data;
int err;
snd_mixer_elem_t *elem;
am->volume_set = -1;
err = snd_mixer_open(&am->handle, 0);
if (err < 0) {
g_set_error(error_r, alsa_mixer_quark(), err,
"snd_mixer_open() failed: %s", snd_strerror(err));
return false;
}
if ((err = snd_mixer_attach(am->handle, am->device)) < 0) {
alsa_mixer_close(data);
g_set_error(error_r, alsa_mixer_quark(), err,
"failed to attach to %s: %s",
am->device, snd_strerror(err));
return false;
}
if ((err = snd_mixer_selem_register(am->handle, NULL,
NULL)) < 0) {
alsa_mixer_close(data);
g_set_error(error_r, alsa_mixer_quark(), err,
"snd_mixer_selem_register() failed: %s",
snd_strerror(err));
return false;
}
if ((err = snd_mixer_load(am->handle)) < 0) {
alsa_mixer_close(data);
g_set_error(error_r, alsa_mixer_quark(), err,
"snd_mixer_load() failed: %s\n",
snd_strerror(err));
return false;
}
elem = snd_mixer_first_elem(am->handle);
while (elem) {
if (snd_mixer_elem_get_type(elem) == SND_MIXER_ELEM_SIMPLE) {
if ((g_ascii_strcasecmp(am->control,
snd_mixer_selem_get_name(elem)) == 0) &&
(am->index == snd_mixer_selem_get_index(elem))) {
break;
}
}
elem = snd_mixer_elem_next(elem);
}
if (elem) {
am->elem = elem;
snd_mixer_selem_get_playback_volume_range(am->elem,
&am->volume_min,
&am->volume_max);
return true;
}
alsa_mixer_close(data);
g_set_error(error_r, alsa_mixer_quark(), 0,
"no such mixer control: %s", am->control);
return false;
}
