コード例 #1
0
bool select_card_by_name(const char *device_name)
{
	int err;
	bool opened;
	char *msg;

	close_hctl();
	unplugged = FALSE;

	opened = FALSE;
	if (device_name) {
		err = snd_mixer_attach(mixer, device_name);
		if (err >= 0)
			opened = TRUE;
		else {
			msg = casprintf(_("Cannot open mixer device '%s'."), device_name);
			show_alsa_error(msg, err);
			free(msg);
		}
	}
	if (opened) {
		mixer_device_name = cstrdup(device_name);

		err = snd_mixer_load(mixer);
		if (err < 0)
			fatal_alsa_error(_("cannot load mixer controls"), err);
	}

	display_card_info();
	set_view_mode(view_mode);
	return opened;
}
コード例 #2
0
ファイル: alsamixer.cpp プロジェクト: darvid/tudor-volumed 
AlsaMixer::AlsaMixer(const std::string& cardname) : IMixer()
{
    int err;
    this->volume = -1;
    this->muted_volume = 100;
    this->set_card_name(cardname);
    if (0 > (err = this->load_handle()))
    {
        this->clean_up();
        fatal_alsa_error("unable to open mixer", err);
    }
}
コード例 #3
0
void create_mixer_object(struct snd_mixer_selem_regopt *selem_regopt)
{
	int err;

	err = snd_mixer_open(&mixer, 0);
	if (err < 0)
		fatal_alsa_error(_("cannot open mixer"), err);

	mixer_device_name = cstrdup(selem_regopt->device);
	err = snd_mixer_selem_register(mixer, selem_regopt, NULL);
	if (err < 0)
		fatal_alsa_error(_("cannot open mixer"), err);

	snd_mixer_set_callback(mixer, mixer_callback);

	err = snd_mixer_load(mixer);
	if (err < 0)
		fatal_alsa_error(_("cannot load mixer controls"), err);

	err = snd_mixer_selem_id_malloc(&current_selem_id);
	if (err < 0)
		fatal_error("out of memory");
}