main: add a common init method

Rename the application to gst-pipeline-studio and
add an init method to initialize
gstreamer and x11

Cargo.lock

@@ -344,6 +344,7 @@ dependencies = [
  "gtk4",
  "log",
  "once_cell",
+ "x11",
  "xml-rs",
 ]
 
@@ -826,6 +827,16 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
+[[package]]
+name = "x11"
+version = "2.19.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6dd0565fa8bfba8c5efe02725b14dff114c866724eff2cfd44d76cea74bcd87a"
+dependencies = [
+ "libc",
+ "pkg-config",
+]
+
 [[package]]
 name = "xml-rs"
 version = "0.8.4"

Cargo.toml

@@ -13,3 +13,4 @@ gstreamer = "0.17"
 log = "0.4.11"
 once_cell = "1.7.2"
 xml-rs = "0.8.4"
+x11 = { version = "2.18", features = ["xlib"] }

src/common.rs

@@ -0,0 +1,32 @@
+// common.rs
+//
+// Copyright 2021 Stéphane Cerveau <scerveau@collabora.com>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+// SPDX-License-Identifier: GPL-3.0-only
+
+use anyhow::Result;
+use gstreamer as gst;
+
+pub const APPLICATION_NAME: &str = "org.freedesktop.gst-pipeline-studio";
+
+pub fn init() -> Result<()> {
+    unsafe {
+        x11::xlib::XInitThreads();
+    }
+    gst::init()?;
+    gtk::init()?;
+    Ok(())
+}

src/main.rs

@@ -20,20 +20,19 @@
 #[macro_use]
 mod macros;
 mod app;
+mod common;
 mod graphmanager;
 mod pipeline;
 mod pluginlist;
-
 use gtk::prelude::*;
 
 use crate::app::GPSApp;
+use crate::common::init;
+
 fn main() {
     //    gio::resources_register_include!("compiled.gresource").unwrap();
-
+    init().expect("Unable to init app");
-    let application = gtk::Application::new(
+    let application = gtk::Application::new(Some(common::APPLICATION_NAME), Default::default());
-        Some("com.github.gtk-rs.examples.menu_bar"),
-        Default::default(),
-    );
     application.connect_startup(|application| {
         GPSApp::on_startup(application);
     });

src/pipeline.rs

@@ -79,16 +79,13 @@ impl PipelineWeak {
 
 #[derive(Debug)]
 pub struct PipelineInner {
-    initialized: bool,
     pipeline: RefCell<Option<gst::Pipeline>>,
     current_state: Cell<PipelineState>,
 }
 
 impl Pipeline {
     pub fn new() -> Result<Self, Box<dyn error::Error>> {
-        gst::init()?;
         let pipeline = Pipeline(Rc::new(PipelineInner {
-            initialized: true,
             pipeline: RefCell::new(None),
             current_state: Cell::new(PipelineState::Stopped),
         }));