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Add spectrum element

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This commit is contained in:
Alexander Kojevnikov 2010-05-03 22:13:02 +10:00
parent bfc0a505a2
commit 761287eb7a
1 changed files with 40 additions and 6 deletions
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46
src/spek-window.vala
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@ -36,15 +36,20 @@ namespace Spek {
private void open (string name) {
var pipeline = new Pipeline ("pipeline");
var filesrc = ElementFactory.make ("filesrc", "filesrc");
var decodebin = ElementFactory.make ("decodebin", "decodebin");
var filesrc = ElementFactory.make ("filesrc", null);
var decodebin = ElementFactory.make ("decodebin", null);
pipeline.add_many (filesrc, decodebin);
filesrc.link (decodebin);
filesrc.set ("location", name);
Signal.connect (decodebin, "new-decoded-pad", (GLib.Callback) on_new_decoded_pad, pipeline);
pipeline.set_state (State.PAUSED);
pipeline.get_state (null, null, -1);
pipeline.get_bus ().add_watch (on_watch);
if (StateChangeReturn.ASYNC == pipeline.set_state (State.PLAYING)) {
pipeline.get_state (null, null, -1);
}
Thread.usleep (1000000);
unowned Iterator it = decodebin.iterate_src_pads ();
void *data;
@ -56,12 +61,41 @@ namespace Spek {
}
}
private static bool on_watch (Bus bus, Message message) {
var structure = message.get_structure ();
if (message.type == Gst.MessageType.ELEMENT &&
structure.get_name () == "spectrum") {
// TODO: binding must be fixed: `out endtime`
ClockTime endtime = 0;
void *p = &endtime;
structure.get_clock_time ("endtime", (ClockTime) p);
stdout.printf ("%d:", endtime / 1000000000);
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 ());
}
stdout.printf ("\n");
}
return true;
}
private static void on_new_decoded_pad (
Element decodebin, Pad new_pad, bool last, Pipeline pipeline) {
var spectrum = ElementFactory.make ("spectrum", null);
pipeline.add (spectrum);
var sinkpad = spectrum.get_static_pad ("sink");
new_pad.link (sinkpad);
spectrum.set ("bands", 10);
spectrum.set ("interval", 1000000000); // 1 sec
spectrum.set ("message-magnitude", true);
spectrum.set ("post-messages", true);
spectrum.set_state (State.PAUSED);
var fakesink = ElementFactory.make ("fakesink", null);
pipeline.add (fakesink);
var sinkpad = fakesink.get_static_pad ("sink");
new_pad.link (sinkpad);
spectrum.link (fakesink);
fakesink.set_state (State.PAUSED);
}
}