forked from mirrors/gstreamer-rs
79 lines
2.4 KiB
Rust
79 lines
2.4 KiB
Rust
extern crate gstreamer as gst;
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use gst::prelude::*;
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extern crate glib;
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extern crate futures;
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use futures::future;
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use futures::prelude::*;
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use std::env;
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#[path = "../examples-common.rs"]
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mod examples_common;
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fn example_main() {
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// Get the default main context and make it also the thread default, then create
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// a main loop for it
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let ctx = glib::MainContext::default();
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ctx.push_thread_default();
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let loop_ = glib::MainLoop::new(Some(&ctx), false);
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// Read the pipeline to launch from the commandline, using the launch syntax.
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let pipeline_str = env::args().collect::<Vec<String>>()[1..].join(" ");
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gst::init().unwrap();
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// Create a pipeline from the launch-syntax given on the cli.
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let pipeline = gst::parse_launch(&pipeline_str).unwrap();
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let bus = pipeline.get_bus().unwrap();
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pipeline
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.set_state(gst::State::Playing)
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.expect("Unable to set the pipeline to the `Playing` state");
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// BusStream implements the Stream trait. Stream::for_each is calling a closure for each item
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// and returns a Future that resolves when the stream is done
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let loop_clone = loop_.clone();
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let messages = gst::BusStream::new(&bus).for_each(move |msg| {
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use gst::MessageView;
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// Determine whether we want to quit: on EOS or error message
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// we quit, otherwise simply continue.
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match msg.view() {
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MessageView::Eos(..) => loop_clone.quit(),
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MessageView::Error(err) => {
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println!(
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"Error from {:?}: {} ({:?})",
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err.get_src().map(|s| s.get_path_string()),
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err.get_error(),
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err.get_debug()
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);
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loop_clone.quit();
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}
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_ => (),
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}
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// New future to resolve for each message: nothing here
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future::ready(())
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});
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// Spawn our message handling stream
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ctx.spawn_local(messages);
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// And run until something is quitting the loop, i.e. an EOS
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// or error message is received above
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loop_.run();
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pipeline
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.set_state(gst::State::Null)
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.expect("Unable to set the pipeline to the `Null` state");
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ctx.pop_thread_default();
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}
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fn main() {
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// tutorials_common::run is only required to set up the application environent on macOS
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// (but not necessary in normal Cocoa applications where this is set up autmatically)
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examples_common::run(example_main);
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}
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