forked from mirrors/gstreamer-rs
Add example doing queries
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1 changed files with 82 additions and 0 deletions
82
examples/src/bin/queries.rs
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82
examples/src/bin/queries.rs
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extern crate gstreamer as gst;
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use gst::*;
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extern crate glib;
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use glib::*;
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use std::env;
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fn main() {
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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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let main_loop = MainLoop::new(None, false);
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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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let ret = pipeline.set_state(gst::State::Playing);
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assert_ne!(ret, gst::StateChangeReturn::Failure);
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let main_loop_clone = main_loop.clone();
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let pipeline_clone = pipeline.clone();
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glib::timeout_add_seconds(1, move || {
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let pipeline = &pipeline_clone;
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//let pos = pipeline.query_position(Format::Time).unwrap_or(-1);
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//let dur = pipeline.query_duration(Format::Time).unwrap_or(-1);
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let pos = {
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let mut q = Query::new_position(Format::Time);
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pipeline.query(q.get_mut().unwrap());
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match q.view() {
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QueryView::Position(ref p) => {
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p.get().1
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},
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_ => unreachable!(),
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}
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};
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let dur = {
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let mut q = Query::new_duration(Format::Time);
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pipeline.query(q.get_mut().unwrap());
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match q.view() {
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QueryView::Duration(ref p) => {
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p.get().1
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},
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_ => unreachable!(),
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}
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};
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println!("{} / {}", pos, dur);
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glib::Continue(true)
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});
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//bus.add_signal_watch();
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//bus.connect_message(move |_, msg| {
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bus.add_watch(move |_, msg| {
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let main_loop = &main_loop_clone;
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match msg.view() {
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MessageView::Eos => main_loop.quit(),
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MessageView::Error(err) => {
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println!(
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"Error from {}: {} ({:?})",
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msg.get_src().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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main_loop.quit();
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}
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_ => (),
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};
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glib::Continue(true)
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});
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main_loop.run();
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let ret = pipeline.set_state(gst::State::Null);
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assert_ne!(ret, gst::StateChangeReturn::Failure);
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}
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