From 694ea82b2568d9eb0cebc7dcc040f9a8b22d87af Mon Sep 17 00:00:00 2001
From: Kavan Mevada <kavanmevada@gmail.com>
Date: Mon, 15 Jun 2020 21:37:40 +0000
Subject: [PATCH] examples: Add a simple file concatenation example in
 javascript

---
 examples/gjs/simple.js | 82 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 examples/gjs/simple.js

diff --git a/examples/gjs/simple.js b/examples/gjs/simple.js
new file mode 100644
index 00000000..89bcf943
--- /dev/null
+++ b/examples/gjs/simple.js
@@ -0,0 +1,82 @@
+#!/usr/bin/gjs
+
+/*
+    Usage: gjs simple.js '/path/to/sample1' '/path/to/sample2' '/path/to/output'
+*/
+
+const {Gio, GLib, Gtk, GES, Gst, GstPbutils} = imports.gi;
+
+const App = function (ARGV) {
+    this.title = 'Example';
+    GLib.set_prgname(this.title);
+
+    Gst.init(null);
+    GES.init();
+    this.application = new Gtk.Application();
+    this.application.connect('activate', () => { this.onActivate(ARGV); });
+    this.application.run([]);
+};
+
+
+App.prototype.onActivate = function(ARGV) {
+
+    this.window = new Gtk.ApplicationWindow({ application: this.application,
+        default_height: 150,
+        default_width: 720,
+        window_position: Gtk.WindowPosition.CENTER });
+    this.window.show_all();
+
+    const sampleFile1 = Gio.file_new_for_path(ARGV[0]);
+    const sampleFile2 = Gio.file_new_for_path(ARGV[1]);
+    const outputFile = Gio.file_new_for_path(ARGV[2]);
+
+
+    const timeline = GES.Timeline.new();
+    timeline.add_track(GES.AudioTrack.new());
+    this.layer = timeline.append_layer();
+
+    this.pipeline = GES.Pipeline.new();
+    this.pipeline.set_timeline(timeline);
+    this.pipeline.set_render_settings(outputFile.get_uri(), this._getProfile());
+    this.pipeline.set_mode(GES.PipelineFlags.RENDER); // Must be called after set_render_settings!
+
+
+    this.isAdded = [false, false];
+    /* Add your clips to the unique layer while recording then at the end render that timeline: */
+    GES.Asset.request_async(GES.UriClip, sampleFile1.get_uri(), null, (_, res) => this._addAsset(0, 0, res));
+    GES.Asset.request_async(GES.UriClip, sampleFile2.get_uri(), null, (_, res) => this._addAsset(1, 5 * Gst.SECOND, res));
+
+    
+};
+
+
+App.prototype._addAsset = function(index, startPos, res) {
+    const asset = GES.Asset.request_finish(res); // GES.UriClipAsset
+    this.layer.add_asset(asset, startPos, 0, asset.get_duration(), GES.TrackType.AUDIO);
+    this.isAdded[index] = true;
+
+    if (!this.isAdded.some(v => v === false))
+        this.pipeline.set_state(Gst.State.PLAYING);
+}
+
+
+App.prototype._getProfile = function() {
+    const profile = {
+        containerCaps: 'application/ogg',
+        audioCaps: 'audio/x-opus'
+    };
+
+    let audioCaps = Gst.Caps.from_string(profile.audioCaps);
+    audioCaps.set_value('channels', 2);
+
+    let encodingProfile = GstPbutils.EncodingAudioProfile.new(audioCaps, null, null, 1);
+    let containerCaps = Gst.Caps.from_string(profile.containerCaps);
+    let containerProfile = GstPbutils.EncodingContainerProfile.new('record', null, containerCaps, null);
+    containerProfile.add_profile(encodingProfile);
+
+    return containerProfile;
+}
+
+
+//Run the application
+new App(ARGV);
\ No newline at end of file
-- 
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