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Customise the number of bands and samples

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This commit is contained in:
Alexander Kojevnikov 2010-05-04 22:47:38 +10:00
parent 5926b602c6
commit 65fcc182e1
2 changed files with 45 additions and 38 deletions
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81
src/spek-source.vala
View File

@ -4,11 +4,16 @@ namespace Spek {
public class Source : GLib.Object {
public string file_name { get; construct; }
public int bands { get; construct; }
public int samples { get; construct; }
private Pipeline pipeline;
private Pipeline pipeline = null;
private Element spectrum = null;
private Pad pad = null;
private static int sample = 0;
public Source (string file_name) {
GLib.Object (file_name: file_name);
public Source (string file_name, int bands, int samples) {
GLib.Object (file_name: file_name, bands: bands, samples: samples);
}
~Source () {
@ -16,6 +21,7 @@ namespace Spek {
}
construct {
// TODO: catch errors
pipeline = new Pipeline ("pipeline");
var filesrc = ElementFactory.make ("filesrc", null);
var decodebin = ElementFactory.make ("decodebin", null);
@ -23,55 +29,56 @@ namespace Spek {
filesrc.link (decodebin);
filesrc.set ("location", file_name);
Signal.connect (decodebin, "new-decoded-pad", (GLib.Callback) on_new_decoded_pad, pipeline);
// decodebin's src pads are not constructed immediately.
// See gst-plugins-base/tree/gst/playback/test6.c
Signal.connect (
decodebin, "new-decoded-pad",
(GLib.Callback) on_new_decoded_pad, this);
pipeline.get_bus ().add_watch (on_bus_watch);
if (StateChangeReturn.ASYNC == pipeline.set_state (State.PLAYING)) {
if (pipeline.set_state (State.PAUSED) == StateChangeReturn.ASYNC) {
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 ());
}
*/
// TODO: replace with Pad.query_duration when bgo#617260 is fixed
var query = new Query.duration (Format.TIME);
pad.query (query);
Format format;
int64 duration;
query.parse_duration (out format, out duration);
spectrum.set ("interval", duration / (samples + 1));
pipeline.set_state (State.PLAYING);
}
// TODO: get rid of the last parameter when bgo#615979 is fixed
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);
Element decodebin, Pad new_pad, bool last, Source source) {
if (spectrum != null) {
// We want to construct the spectrum element only for the first decoded pad.
return;
}
source.spectrum = ElementFactory.make ("spectrum", null);
source.pipeline.add (source.spectrum);
var sinkpad = source.spectrum.get_static_pad ("sink");
source.pad = new_pad;
source.pad.link (sinkpad);
source.spectrum.set ("bands", source.bands);
//source.spectrum.set ("threshold", -99);
source.spectrum.set ("message-magnitude", true);
source.spectrum.set ("post-messages", true);
source.spectrum.set_state (State.PAUSED);
var fakesink = ElementFactory.make ("fakesink", null);
pipeline.add (fakesink);
spectrum.link (fakesink);
source.pipeline.add (fakesink);
source.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);
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);

2
src/spek-window.vala
View File

@ -30,7 +30,7 @@ namespace Spek {
STOCK_CANCEL, ResponseType.CANCEL,
STOCK_OPEN, ResponseType.ACCEPT, null);
if (chooser.run () == ResponseType.ACCEPT) {
source = new Source (chooser.get_filename ());
source = new Source (chooser.get_filename (), 10, 100);
}
chooser.destroy ();
}