mirror of
https://github.com/tuxbox-fork-migrations/recycled-ni-libstb-hal.git
synced 2025-08-26 15:02:43 +02:00
eb7717d710
Origin commit data
------------------
Branch: master
Commit: 2729075a35
Author: martii <m4rtii@gmx.de>
Date: 2014-04-16 (Wed, 16 Apr 2014)
------------------
No further description and justification available within origin commit message!
------------------
This commit was generated by Migit
69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
/*
|
|
* audio_mixer.cpp
|
|
*
|
|
* (C) 2012 martii
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <audio_mixer.h>
|
|
|
|
mixerVolume::mixerVolume(const char *name, const char *card, long volume) {
|
|
snd_mixer_selem_id_t *sid = NULL;
|
|
elem = NULL;
|
|
handle = NULL;
|
|
min = 0;
|
|
max = 100;
|
|
char cardId[10];
|
|
|
|
if (!name || !card)
|
|
return;
|
|
|
|
int cx = snd_card_get_index(card);
|
|
if (cx < 0 || cx > 31)
|
|
return;
|
|
snprintf(cardId, sizeof(cardId), "hw:%i", cx);
|
|
|
|
if (0 > snd_mixer_open(&handle, 0))
|
|
return;
|
|
if (0 > snd_mixer_attach(handle, cardId))
|
|
return;
|
|
if (0 > snd_mixer_selem_register(handle, NULL, NULL))
|
|
return;
|
|
if (0 > snd_mixer_load(handle))
|
|
return;
|
|
snd_mixer_selem_id_alloca(&sid);
|
|
if (!sid)
|
|
return;
|
|
snd_mixer_selem_id_set_index(sid, 0);
|
|
snd_mixer_selem_id_set_name(sid, name);
|
|
elem = snd_mixer_find_selem(handle, sid);
|
|
if (elem) {
|
|
snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
|
|
setVolume(volume);
|
|
}
|
|
}
|
|
mixerVolume::~mixerVolume()
|
|
{
|
|
if (handle)
|
|
snd_mixer_close(handle);
|
|
}
|
|
|
|
bool mixerVolume::setVolume(long volume) {
|
|
return elem
|
|
&& (volume > -1)
|
|
&& (volume < 101)
|
|
&& !snd_mixer_selem_set_playback_volume_all(elem, min + volume * (max - min)/100);
|
|
}
|