dockapps/AlsaMixer.app/AMixer/AItem.cc
Wade Berrier f331064eae Add AlsaMixer.app to repository
http://dockapps.windowmaker.org/file.php/id/253 shows a version available from

http://www.stud.fit.vutbr.cz/~xhlavk00/AlsaMixer.app/

but it's a dead link.

Check in the version from

http://dockapps.windowmaker.org/download.php/id/517/AlsaMixer.app-0.1.tar.gz

Untarred and removed version from directory.  No other changes.

Signed-off-by: Wade Berrier <wberrier@gmail.com>
2012-10-02 23:26:31 +01:00

88 lines
2.1 KiB
C++

// AItem.cc, Petr Hlavka, 2004
#include "AItem.h"
#include "AMixer.h"
#include <alsa/asoundlib.h>
#include <vector>
#define ROUND_POS(x) (long ((long (x) + 0.5 > (x)) ? (x) : (x) + 1))
// load only playback channels, don't care about common items
AItem::AItem(AMixer *m, snd_mixer_elem_t *e) {
mixer = m;
aElem = e;
name = snd_mixer_selem_get_name(aElem);
hPVolume = snd_mixer_selem_has_playback_volume(aElem);
hPSwitch = snd_mixer_selem_has_playback_switch(aElem);
if (hPVolume)
snd_mixer_selem_get_playback_volume_range(aElem, &minPVolume, &maxPVolume);
else
minPVolume = maxPVolume = 0;
for (int channel = 0; channel <= (int) SND_MIXER_SCHN_LAST; channel++) {
if (snd_mixer_selem_has_playback_channel(aElem, (SNDCHID_T) channel)) {
AChannel *ch = new AChannel(this, (SNDCHID_T) channel);
pbChannels.push_back(ch);
}
}
}
AItem::~AItem() {
for (unsigned int i = 0; i < pbChannels.size(); i++)
delete pbChannels[i];
}
// set same volume for all channels in this item in percent
void AItem::setVolumePerc(unsigned int percent) {
if (percent > 100)
percent = 100;
snd_mixer_selem_set_playback_volume_all(aElem, (long) ROUND_POS((minPVolume + (maxPVolume - minPVolume) * percent / 100.0)));
}
// get max channel volume of all channels in this item in percent
unsigned int AItem::getVolumePerc() {
long max_vol = 0, act_vol;
// find the max volume
for (unsigned int i = 0; i < pbChannels.size(); i++)
if ((act_vol = pbChannels[i]->getVolume()) > max_vol)
max_vol = act_vol;
// convert it into percent
if (minPVolume != maxPVolume)
return ((unsigned int) ROUND_POS((max_vol - minPVolume) * 100.0 / (maxPVolume - minPVolume)));
else
return (0);
}
// in this app side of view, item is muted if all channels is muted
bool AItem::isMuted() {
for (unsigned int i = 0; i < pbChannels.size(); i++)
if (!pbChannels[i]->isMuted())
return (false);
return (true);
}
// mute all channels
void AItem::mute() {
snd_mixer_selem_set_playback_switch_all(aElem, false);
}
// unmute all channels
void AItem::unmute() {
snd_mixer_selem_set_playback_switch_all(aElem, true);
}