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Factor out gst-specific code

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This commit is contained in:
Alexander Kojevnikov 2010-05-04 19:33:03 +10:00
parent 761287eb7a
commit 81373dd7cc
3 changed files with 79 additions and 67 deletions
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1
src/Makefile.am
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@ -2,6 +2,7 @@ bin_PROGRAMS = spek
spek_SOURCES = \
spek.vala \
spek-source.vala \
spek-window.vala
INCLUDES = \

75
src/spek-source.vala Normal file
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@ -0,0 +1,75 @@
using Gst;
namespace Spek {
public class Source {
private Pipeline pipeline;
public Source (string file_name) {
pipeline = new Pipeline ("pipeline");
var filesrc = ElementFactory.make ("filesrc", null);
var decodebin = ElementFactory.make ("decodebin", null);
pipeline.add_many (filesrc, decodebin);
filesrc.link (decodebin);
filesrc.set ("location", file_name);
Signal.connect (decodebin, "new-decoded-pad", (GLib.Callback) on_new_decoded_pad, pipeline);
pipeline.get_bus ().add_watch (on_bus_watch);
if (StateChangeReturn.ASYNC == pipeline.set_state (State.PLAYING)) {
pipeline.get_state (null, null, -1);
}
/*
unowned Iterator it = decodebin.iterate_src_pads ();
void *data;
while (it.next (out data) == IteratorResult.OK) {
var pad = (Pad) data;
var caps = pad.get_caps ();
var structure = caps.get_structure (0);
stdout.printf ("structure=%s\n", structure.to_string ());
}
*/
}
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 ("threshold", -99);
spectrum.set ("message-magnitude", true);
spectrum.set ("post-messages", true);
spectrum.set_state (State.PAUSED);
var fakesink = ElementFactory.make ("fakesink", null);
pipeline.add (fakesink);
spectrum.link (fakesink);
fakesink.set_state (State.PAUSED);
}
private static bool on_bus_watch (Bus bus, Message message) {
var structure = message.get_structure ();
if (message.type == MessageType.ELEMENT &&
structure.get_name () == "spectrum") {
ClockTime endtime = 0;
// TODO: binding must be fixed: `out endtime`
structure.get_clock_time ("endtime", (ClockTime) (void *) (&endtime));
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;
}
}
}

70
src/spek-window.vala
View File

@ -1,9 +1,10 @@
using Gst;
using Gtk;
namespace Spek {
public class Window : Gtk.Window {
private Source source;
public Window () {
this.title = Config.PACKAGE_STRING;
this.set_default_size (300, 200);
@ -29,74 +30,9 @@ namespace Spek {
STOCK_CANCEL, ResponseType.CANCEL,
STOCK_OPEN, ResponseType.ACCEPT, null);
if (chooser.run () == ResponseType.ACCEPT) {
open (chooser.get_filename ());
source = new Source (chooser.get_filename ());
}
chooser.destroy ();
}
private void open (string name) {
var pipeline = new Pipeline ("pipeline");
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.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;
while (it.next (out data) == IteratorResult.OK) {
var pad = (Pad) data;
var caps = pad.get_caps ();
var structure = caps.get_structure (0);
stdout.printf ("structure=%s\n", structure.to_string ());
}
}
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);
spectrum.link (fakesink);
fakesink.set_state (State.PAUSED);
}
}
}