Implement simple example application and clean up API

Cargo.lock

@@ -15,6 +15,14 @@ name = "bitflags"
 version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "examples"
+version = "0.1.0"
+dependencies = [
+ "glib 0.1.3 (git+https://github.com/gtk-rs/glib)",
+ "gstreamer 0.1.0",
+]
+
 [[package]]
 name = "glib"
 version = "0.1.3"

Cargo.toml

@@ -2,4 +2,5 @@
 
 members = [
   "gstreamer",
+  "examples",
 ]

Gir_Gst.toml

@@ -156,6 +156,16 @@ status = "generate"
         [object.function.return]
         bool_return_is_error = "Failed to set object name"
 
+    [[object.function]]
+    name = "get_name"
+        [object.function.return]
+        nullable = false
+
+    [[object.function]]
+    name = "get_path_string"
+        [object.function.return]
+        nullable = false
+
     [[object.function]]
     name = "set_parent"
         [object.function.return]

examples/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "examples"
+version = "0.1.0"
+authors = ["Sebastian Dröge <sebastian@centricular.com>"]
+
+[dependencies]
+glib = { version = "0.1.3", git = "https://github.com/gtk-rs/glib" }
+gstreamer = { path = "../gstreamer" }
+
+[[bin]]
+name = "launch"

examples/src/launch.rs

@@ -0,0 +1,31 @@
+extern crate gstreamer as gst;
+use gst::*;
+
+use std::u64;
+
+fn main() {
+    gst::init().unwrap();
+
+    let pipeline = gst::parse_launch("audiotestsrc ! autoaudiosink").unwrap();
+    let bus = pipeline.get_bus().unwrap();
+
+    let ret = pipeline.set_state(gst::State::Playing);
+    assert_ne!(ret, gst::StateChangeReturn::Failure);
+
+    loop {
+        let msg = match bus.timed_pop(u64::MAX) {
+            None => break,
+            Some(msg) => msg,
+        };
+
+        match msg.view() {
+            MessageView::Eos(_) => break,
+            MessageView::Error(err) => {
+                println!("Error from {}: {} ({:?})", msg.get_src().get_path_string(),
+                    err.get_error(), err.get_debug());
+                break;
+            },
+            _ => (),
+        }
+    }
+}

gstreamer/src/auto/object.rs

@@ -50,11 +50,11 @@ pub trait ObjectExt {
 
     //fn get_g_value_array(&self, property_name: &str, timestamp: ClockTime, interval: ClockTime, values: /*Ignored*/&[&glib::Value]) -> bool;
 
-    fn get_name(&self) -> Option<String>;
+    fn get_name(&self) -> String;
 
     fn get_parent(&self) -> Option<Object>;
 
-    fn get_path_string(&self) -> Option<String>;
+    fn get_path_string(&self) -> String;
 
     //fn get_value(&self, property_name: &str, timestamp: ClockTime) -> /*Ignored*/Option<glib::Value>;
 
@@ -117,7 +117,7 @@ impl<O: IsA<Object>> ObjectExt for O {
     //    unsafe { TODO: call ffi::gst_object_get_g_value_array() }
     //}
 
-    fn get_name(&self) -> Option<String> {
+    fn get_name(&self) -> String {
         unsafe {
             from_glib_full(ffi::gst_object_get_name(self.to_glib_none().0))
         }
@@ -129,7 +129,7 @@ impl<O: IsA<Object>> ObjectExt for O {
         }
     }
 
-    fn get_path_string(&self) -> Option<String> {
+    fn get_path_string(&self) -> String {
         unsafe {
             from_glib_full(ffi::gst_object_get_path_string(self.to_glib_none().0))
         }

gstreamer/src/lib.rs

@@ -29,14 +29,15 @@ pub use glib::{
     Value,
 };
 
-pub use auto::*;
 mod auto;
+pub use auto::*;
 pub use auto::functions::{parse_launch, parse_bin_from_description};
 
 pub mod miniobject;
 pub use miniobject::GstRc;
 pub mod message;
 pub use message::Message;
+pub use message::MessageView;
 
 use std::ptr;