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Add a callback to the source

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This commit is contained in:
Alexander Kojevnikov 2010-05-04 23:16:41 +10:00
parent 65fcc182e1
commit 28ade26079
2 changed files with 24 additions and 9 deletions
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23
src/spek-source.vala
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@ -6,14 +6,20 @@ namespace Spek {
public string file_name { get; construct; }
public int bands { get; construct; }
public int samples { get; construct; }
// TODO: file a bug, cannot s/set/construct/
public Callback callback {get; set; }
public delegate void Callback (int sample, float[] values);
private Pipeline pipeline = null;
private Element spectrum = null;
private Pad pad = null;
private static int sample = 0;
private int sample;
private float[] values;
public Source (string file_name, int bands, int samples) {
public Source (string file_name, int bands, int samples, Callback callback) {
GLib.Object (file_name: file_name, bands: bands, samples: samples);
this.callback = callback;
}
~Source () {
@ -21,6 +27,9 @@ namespace Spek {
}
construct {
sample = 0;
values = new float[bands];
// TODO: catch errors
pipeline = new Pipeline ("pipeline");
var filesrc = ElementFactory.make ("filesrc", null);
@ -75,16 +84,14 @@ namespace Spek {
fakesink.set_state (State.PAUSED);
}
private static bool on_bus_watch (Bus bus, Message message) {
private bool on_bus_watch (Bus bus, Message message) {
var structure = message.get_structure ();
if (message.type == MessageType.ELEMENT && structure.get_name () == "spectrum") {
stdout.printf ("%d:", sample++);
var magnitudes = structure.get_value ("magnitude");
for (int i=0; i<10; i++) {
var mag = magnitudes.list_get_value (i);
stdout.printf (" %.2f", mag.get_float ());
for (int i = 0; i < bands; i++) {
values[i] = magnitudes.list_get_value (i).get_float ();
}
stdout.printf ("\n");
callback (sample++, values);
}
return true;
}

10
src/spek-window.vala
View File

@ -30,9 +30,17 @@ namespace Spek {
STOCK_CANCEL, ResponseType.CANCEL,
STOCK_OPEN, ResponseType.ACCEPT, null);
if (chooser.run () == ResponseType.ACCEPT) {
source = new Source (chooser.get_filename (), 10, 100);
source = new Source (chooser.get_filename (), 10, 100, source_callback);
}
chooser.destroy ();
}
private void source_callback (int sample, float[] values) {
stdout.printf ("%d:", sample);
foreach (var value in values) {
stdout.printf (" %.2f", value);
}
stdout.printf ("\n");
}
}
}