Getting a mixer with specific capabilities

Question

Hi, i posted long ago a question that i had, which captfoos (i'm not so sure if i spelled it right) kindly answered that it was not that simple,what i wanted to do back then(i still want/need to do it, but i've been busy with other things) it was capture audio from the computers input port, and just play it (what i intend to do is a little bit more than that, but since i fail to do this which happends to be the "simplest" part i'm doomed xD), captfoos kindly answered that a line (which happends to be the same that a port ) could only deliver data to a mixer, not all mixers support the input port, and not all the input ports in the computers are the same, and not all the mixers are the same either, so, if getting an input port is as simple as doing this:
line = (Port) AudioSystem.getLine(
Port.Info.LINE_IN);
(but useless for me so far)
My question is this: ¿How in the name of java sound can i get that to work xD? Well, more like, how can i get a mixer that can handle that type of line, so i can move forward with this? i'd really appreciaty any kind of help.
I don't do "isLineSupported" since the program will never even be attempted to run on a computer that does not support that line.
Thanks in advance.

Answer 1

Well, i tried the codes and they don't seem to work, but you told backthen, that i could not capture audio from the port, but the tutorial says:
This code obtains a TargetDataLine object without specifying any attributes other than its class and its audio format. You can use analogous code to obtain other kinds of lines. For a SourceDataLine or a Clip, just substitute that class for TargetDataLine as the class of the line variable, and also in the first argument to the DataLine.Info constructor.
For a Port, you can use static instances of Port.Info, in code like the following:
+if (AudioSystem.isLineSupported(Port.Info.MICROPHONE)) {+
+try {+
line = (Port) AudioSystem.getLine(
Port.Info.MICROPHONE);
+}+
+}+
Note the use of the method isLineSupported to see whether the mixer even has a line of the desired type.
Recall that a source line is an input to a mixer—namely, a Port object if the mixer represents an audio-input device, and a SourceDataLine or Clip object if the mixer represents an audio-output device. Similarly, a target line is an output of the mixer: a Port object for an audio-output mixer, and a TargetDataLine object for an audio-input mixer. What if a mixer doesn't connect to any external hardware device at all? For example, consider an internal or software-only mixer that gets audio from an application program and delivers its mixed audio back to the program. This kind of mixer has SourceDataLine or Clip objects for its input lines and TargetDataLine objects for its output lines.
In my case, the static instance of port would be Port.Info.Line_In
then it says
The previous section, regarding how to obtain a line of a desired type, applies to ports as well as other types of lines. You can obtain all of the source (i.e., input) and target (i.e, output) ports by passing a Port.Info object to the AudioSystem (or Mixer) methods getSourceLineInfo and getTargetLineInfo that take a Line.Info argument. You then iterate over the returned array of objects and invoke Mixer's getLine method to get each port.
My question here is How the hell am i supossed to select the right mixer every time, if the mixer.info is different, even if they do support the same type of line?