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// Copyright (C) 2021 OneStream Live <guillaume.desmottes@onestream.live>
//
// This Source Code Form is subject to the terms of the Mozilla Public License, v2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at
// <https://mozilla.org/MPL/2.0/>.
//
// SPDX-License-Identifier: MPL-2.0
use std::{
collections::HashMap,
path::Path,
sync::{Arc, Mutex},
};
use clap::Parser;
use gst::prelude::*;
#[derive(Debug, Parser)]
#[clap(version, author, about = "An example of uriplaylistbin usage.")]
struct Opt {
#[clap(short, default_value = "1")]
iterations: u32,
uris: Vec<String>,
}
fn create_pipeline(uris: Vec<String>, iterations: u32) -> anyhow::Result<gst::Pipeline> {
let pipeline = gst::Pipeline::default();
let playlist = gst::ElementFactory::make("uriplaylistbin")
.property("uris", &uris)
.property("iterations", iterations)
.build()?;
pipeline.add(&playlist)?;
let sink_bins = Arc::new(Mutex::new(HashMap::new()));
let sink_bins_clone = sink_bins.clone();
let pipeline_weak = pipeline.downgrade();
playlist.connect_pad_added(move |_playlist, src_pad| {
let pipeline = match pipeline_weak.upgrade() {
None => return,
Some(pipeline) => pipeline,
};
let pad_name = src_pad.name();
let sink = if pad_name.starts_with("audio") {
gst::parse_bin_from_description("audioconvert ! audioresample ! autoaudiosink", true)
.unwrap()
} else if pad_name.starts_with("video") {
gst::parse_bin_from_description("videoconvert ! autovideosink", true).unwrap()
} else {
unimplemented!();
};
pipeline.add(&sink).unwrap();
sink.sync_state_with_parent().unwrap();
let sink_pad = sink.static_pad("sink").unwrap();
src_pad.link(&sink_pad).unwrap();
sink_bins.lock().unwrap().insert(pad_name, sink);
});
let pipeline_weak = pipeline.downgrade();
playlist.connect_pad_removed(move |_playlist, pad| {
let pipeline = match pipeline_weak.upgrade() {
None => return,
Some(pipeline) => pipeline,
};
// remove sink bin that was handling the pad
let sink_bins = sink_bins_clone.lock().unwrap();
let sink = sink_bins.get(&pad.name()).unwrap();
pipeline.remove(sink).unwrap();
let _ = sink.set_state(gst::State::Null);
});
Ok(pipeline)
}
fn main() -> anyhow::Result<()> {
gst::init().unwrap();
gsturiplaylistbin::plugin_register_static().expect("Failed to register uriplaylistbin plugin");
let opt = Opt::parse();
if opt.uris.is_empty() {
anyhow::bail!("Need at least one URI to play");
}
let uris = opt
.uris
.into_iter()
.map(|uri| {
let p = Path::new(&uri);
match p.canonicalize() {
Ok(p) => format!("file://{}", p.to_str().unwrap()),
_ => uri,
}
})
.collect();
{
let pipeline = create_pipeline(uris, opt.iterations)?;
pipeline
.set_state(gst::State::Playing)
.expect("Unable to set the pipeline to the `Playing` state");
let bus = pipeline.bus().unwrap();
for msg in bus.iter_timed(gst::ClockTime::NONE) {
use gst::MessageView;
match msg.view() {
MessageView::Error(err) => {
eprintln!(
"Error received from element {:?}: {}",
err.src().map(|s| s.path_string()),
err.error()
);
eprintln!("Debugging information: {:?}", err.debug());
break;
}
MessageView::Eos(..) => break,
_ => (),
}
}
pipeline
.set_state(gst::State::Null)
.expect("Unable to set the pipeline to the `Null` state");
}
unsafe {
gst::deinit();
}
Ok(())
}
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