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player example: Error management with the failure crate

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Philippe Normand 2017-11-10 17:59:57 +01:00 committed by Sebastian Dröge
parent f6ffa6919f
commit bdcf0246eb
2 changed files with 17 additions and 17 deletions
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1
examples/Cargo.toml
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@ -17,6 +17,7 @@ futures = { version = "0.1", optional = true }
tokio-core = { version = "0.1", optional = true } tokio-core = { version = "0.1", optional = true }
send-cell = "0.1" send-cell = "0.1"
byte-slice-cast = "0.1" byte-slice-cast = "0.1"
failure = "0.0.1"
[features] [features]
gst-player = ["gstreamer-player"] gst-player = ["gstreamer-player"]

33
examples/src/bin/player.rs
View file

@ -12,11 +12,14 @@ use std::env;
#[cfg(feature = "gst-player")] #[cfg(feature = "gst-player")]
use std::sync::{Arc, Mutex}; use std::sync::{Arc, Mutex};
pub mod utils; extern crate failure;
#[allow(unused_imports)]
use failure::Error;
#[cfg(feature = "gst-player")] #[cfg(feature = "gst-player")]
fn main_loop(uri: &str) -> Result<(), utils::ExampleError> { fn main_loop(uri: &str) -> Result<(), Error> {
gst::init().map_err(utils::ExampleError::InitFailed)?; gst::init()?;
let main_loop = glib::MainLoop::new(None, false); let main_loop = glib::MainLoop::new(None, false);
@ -25,9 +28,8 @@ fn main_loop(uri: &str) -> Result<(), utils::ExampleError> {
None, None,
Some(&dispatcher.upcast::<gst_player::PlayerSignalDispatcher>()), Some(&dispatcher.upcast::<gst_player::PlayerSignalDispatcher>()),
); );
player
.set_property("uri", &glib::Value::from(uri)) player.set_property("uri", &glib::Value::from(uri))?;
.expect("Can't set uri property");
let error = Arc::new(Mutex::new(Ok(()))); let error = Arc::new(Mutex::new(Ok(())));
@ -48,11 +50,7 @@ fn main_loop(uri: &str) -> Result<(), utils::ExampleError> {
let player = &player_clone; let player = &player_clone;
let error = &error_clone; let error = &error_clone;
*error.lock().unwrap() = Err(utils::ExampleError::ElementError( *error.lock().unwrap() = Err(err.clone());
"player".to_owned(),
err.clone(),
"".to_owned(),
));
player.stop(); player.stop();
main_loop.quit(); main_loop.quit();
@ -63,15 +61,10 @@ fn main_loop(uri: &str) -> Result<(), utils::ExampleError> {
let guard = error.as_ref().lock().unwrap(); let guard = error.as_ref().lock().unwrap();
guard.clone() guard.clone().map_err(|e|e.into())
} }
#[cfg(not(feature = "gst-player"))]
#[allow(unused_variables)] #[allow(unused_variables)]
fn main_loop(uri: &str) -> Result<(), utils::ExampleError> {
Err(utils::ExampleError::MissingFeature("gst-player"))
}
fn main() { fn main() {
let args: Vec<_> = env::args().collect(); let args: Vec<_> = env::args().collect();
let uri: &str = if args.len() == 2 { let uri: &str = if args.len() == 2 {
@ -80,6 +73,12 @@ fn main() {
panic!("Usage: player uri") panic!("Usage: player uri")
}; };
#[cfg(not(feature = "gst-player"))] {
eprintln!("Feature gst-player is required. Please rebuild with --features gst-player");
std::process::exit(-1);
}
#[cfg(feature = "gst-player")]
match main_loop(uri) { match main_loop(uri) {
Ok(r) => r, Ok(r) => r,
Err(e) => eprintln!("Error! {}", e), Err(e) => eprintln!("Error! {}", e),