Control Speaker and Microphone in MAC

Question

Hi,
I've written a sample code to control Audio System (like: Speaker and Microphone volume, Mute/Unmute, etc...). I can do this in Windows and Linux as well. But I'm facing problem to control this in MAC. Could you please help me out from this issue?
Any help will be appreciated.
Thanks,
ARIF

Answer 1

i have same problem:
here is my java code which works fine on windows:
public void setMicrophoneVolume(int value) {
        Mixer.Info[] mixerInfos = AudioSystem.getMixerInfo();
        for (int i = 0; i < mixerInfos.length; i++) {
            Mixer mixer = AudioSystem.getMixer(mixerInfos);
int maxLines = mixer.getMaxLines(Port.Info.MICROPHONE);
Port lineIn = null;
FloatControl volCtrl = null;
if (maxLines > 0) {
try {
lineIn = (Port) mixer.getLine(Port.Info.MICROPHONE);
lineIn.open();
CompoundControl cc = (CompoundControl) lineIn.getControls()[0];
Control[] controls = cc.getMemberControls();
for (Control c : controls) {
if (c instanceof FloatControl) {
volCtrl = (FloatControl) c;
volCtrl.setValue((float) value / 100);
} catch (Exception ex) {
continue;
}code for speaker is similar.
The problem is that  mixer.getMaxLines(...)
always return 0.
If remove check for maxlines for example:
get exception on line lineIn = (Port) mixer.getLine(Port.Info.MICROPHONE);
java.lang.IllegalArgumentException: Line unsupported: MICROPHONE source port
        at com.sun.media.sound.HeadspaceMixer.getLine(HeadspaceMixer.java:241)
        at UI.VolumePanel.setMicrophoneVolume(VolumePanel.java:137)
        at UI.VolumePanel$SliderChangeListener.stateChanged(VolumePanel.java:98)
        at javax.swing.JSlider.fireStateChanged(JSlider.java:338)
        at javax.swing.JSlider$ModelListener.stateChanged(JSlider.java:266)
any help will be appreciated
regards,
Stoyan