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Set up a set of pipelines that mix two different file sources

This commit is contained in:
Savanni D'Gerinel 2024-08-28 21:59:39 -04:00
parent 6b245ac9a0
commit 7467e8d5b2
1 changed files with 114 additions and 143 deletions
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257
gm-dash/server/src/bin/play-track.rs
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@ -1,115 +1,75 @@
use std::time::Duration;
use gstreamer::{
prelude::*, Bus, Element, EventType, MessageType, MessageView, Pad, PadProbeData, PadProbeInfo, PadProbeReturn, Pipeline
prelude::*, Bus, Element, EventType, MessageType, MessageView, Pad, PadDirection, PadPresence,
PadProbeData, PadProbeInfo, PadProbeReturn, PadTemplate, Pipeline,
};
use pipewire::{context::Context, main_loop::MainLoop};
fn main() {
gstreamer::init();
// let srcfactory = gstreamer::ElementFactory::find("filesrc").unwrap().load().unwrap();
let source = gstreamer::ElementFactory::find("filesrc")
.unwrap()
.load()
.unwrap()
.create()
.name("source")
.property("location", "/home/savanni/Music/tavern-music.ogg")
// .property(
// "location",
// "/home/savanni/Music/Night at Work _ Instrumental Chill Music Mix [n9Y2Eb4BaSg].m4a",
// )
.build()
.unwrap();
let decoder = gstreamer::ElementFactory::find("decodebin")
.unwrap()
.load()
.unwrap()
.create()
.name("decoder")
.build()
.unwrap();
let pipeline = gstreamer::Pipeline::new();
let pipeline_object = pipeline.clone().upcast::<gstreamer::Object>();
let sinkfactory = gstreamer::ElementFactory::find("pulsesink")
.unwrap()
.load()
.unwrap();
let defaultsink = sinkfactory.create().name("sink").build().unwrap();
let audio_template = sinkfactory
.static_pad_templates()
.iter()
.next()
.map(|template| template.get())
.unwrap();
let audio_output = sinkfactory.create().name("sink").build().unwrap();
pipeline.add(&audio_output).unwrap();
let funnel = gstreamer::ElementFactory::find("audiomixer")
.unwrap()
.load()
.unwrap()
.create()
.build()
.unwrap();
pipeline.add(&funnel).unwrap();
let convert = gstreamer::ElementFactory::find("audioconvert")
.unwrap()
.load()
.unwrap()
.create()
.build()
.unwrap();
pipeline.add(&convert).unwrap();
funnel.link(&convert).unwrap();
convert.link(&audio_output).unwrap();
/*
setup_file_reader(
&pipeline,
funnel.clone(),
"/home/savanni/Music/technical-station.ogg",
);
*/
setup_file_reader(&pipeline, funnel.clone(), "/home/savanni/Music/techno-city-day.ogg");
let bus = pipeline.bus().unwrap();
/*
let btsink = sinkfactory
.create()
.name("sink")
.property("device", "bluez_output.0C_A6_94_75_6E_8F.1")
.build()
.unwrap();
let convert = gstreamer::ElementFactory::find("audioconvert")
.unwrap()
.load()
.unwrap()
.create()
.name("convert")
.build()
.unwrap();
let resample = gstreamer::ElementFactory::find("audioresample")
.unwrap()
.load()
.unwrap()
.create()
.name("resample")
.build()
.unwrap();
let pipeline = gstreamer::Pipeline::new();
pipeline.add(&source).unwrap();
pipeline.add(&defaultsink).unwrap();
pipeline.add(&decoder).unwrap();
pipeline.add(&convert).unwrap();
pipeline.add(&resample).unwrap();
source.link(&decoder).unwrap();
convert.link(&resample).unwrap();
resample.link(&defaultsink).unwrap();
decoder.connect_pad_added(move |element, pad| handle_pad_added(element, pad, &convert));
// println!("Sink target: {:?}", sink.property::<String>("current-device"));
// println!("Sink target: {:?}", sink.property::<String>("device-name"));
/*
println!("source: {:?}", source);
source.foreach_pad(|_, pad| {
println!("\tpad: {:?} {}, {:?}", pad, pad.name(), pad.direction());
true
});
let source_pad = source.get_pad(pad.name());
source_pad
*/
// source.connect_pad_added(handle_pad_added);
// source.link(&convert).unwrap();
*/
pipeline.set_state(gstreamer::State::Playing).unwrap();
let pipeline_object = pipeline.clone().upcast::<gstreamer::Object>();
/*
std::thread::sleep(Duration::from_secs(5));
println!("switching audio outputs");
pipeline.set_state(gstreamer::State::Paused).unwrap();
resample.unlink(&defaultsink);
pipeline.remove(&defaultsink).unwrap();
pipeline.add(&btsink).unwrap();
resample.link(&btsink).unwrap();
pipeline.set_state(gstreamer::State::Playing).unwrap();
println!("switch complete");
*/
let bus = pipeline.bus().unwrap();
// let msg = bus.timed_pop_filtered(
// gstreamer::ClockTime::NONE,
// &[gstreamer::MessageType::Error, gstreamer::MessageType::Eos],
// );
/*
*/
std::thread::spawn({
let bus = bus.clone();
let pipeline = pipeline.clone();
@ -118,6 +78,9 @@ fn main() {
swap_audio_output(bus, pipeline, resample, defaultsink, btsink);
}
});
*/
pipeline.set_state(gstreamer::State::Playing).unwrap();
let mut playing = false;
@ -163,67 +126,75 @@ fn main() {
pipeline.set_state(gstreamer::State::Null).unwrap();
}
fn handle_pad_added(element: &Element, pad: &Pad, converter: &Element) {
fn handle_pad_added(element: &Element, pad: &Pad, next_element: &Element, template: &PadTemplate) {
println!("handle_pad_added");
println!("\t{:?}", element);
println!("\t{:?}, {:?}", pad, pad.current_caps());
let converter_pad = converter.static_pad("sink").unwrap();
pad.link(&converter_pad).unwrap();
}
fn swap_audio_output(
bus: Bus,
pipeline: Pipeline,
upstream: Element,
oldoutput: Element,
newoutput: Element,
) {
let source_pad = upstream.static_pad("src").unwrap();
source_pad.add_probe(gstreamer::PadProbeType::BLOCK, move |pad, info| {
println!("upstream pad blocked");
/*
if let Some(probe_id) = info.id {
pad.remove_probe(probe_id);
}
/*
let audio_caps = gstreamer::caps::Caps::builder()
.field("audio", "audio/x-raw,
.build();
*/
/*
if let Some(old_element_output) = oldelement.static_pad("src") {
old_element_output.add_probe(gstreamer::PadProbeType::BLOCK, wait_for_eos);
let old_element_input = oldelement.static_pad("sink").unwrap();
old_element_input.send_event(gstreamer::event::Eos::new());
} else {
/* This is a final sink, so we don't have to wait for EOS to go through. */
}
*/
let oldoutput_pad = oldoutput.static_pad("sink").unwrap();
// oldoutput_pad.send_event(gstreamer::event::Eos::new());
// oldoutput.set_state(gstreamer::State::Null).unwrap();
pipeline.remove(&oldoutput).unwrap();
pipeline.add(&newoutput).unwrap();
upstream.link(&newoutput).unwrap();
PadProbeReturn::Remove
});
/*
let audio_pad_template = PadTemplate::new(
"audio-pad-template",
PadDirection::Sink,
PadPresence::Request,
&pad.current_caps().unwrap(),
)
.unwrap();
*/
let next_pad = next_element.request_pad(template, None, None).unwrap();
// let converter_pad = converter.static_pad("sink").unwrap();
pad.link(&next_pad).unwrap();
}
fn wait_for_eos(pad: &Pad, info: &mut PadProbeInfo) -> PadProbeReturn {
/*
match &info.data {
Some(PadProbeData::Event(event)) if event.type_() == EventType::Eos => {
/* Do a lot of things now that this pad is empty of data. */
element.set_state(gstreamer::State::Null);
pipeline.remove(element);
pipeline.add(new_element);
let new_pad = new_element.static_pad("src");
pad.link(new_pad);
fn setup_file_reader(pipeline: &Pipeline, dest: Element, path: &str) {
let source = gstreamer::ElementFactory::find("filesrc")
.unwrap()
.load()
.unwrap()
.create()
.property("location", path)
.build()
.unwrap();
println!("EOS detected");
}
_ => return PadProbeReturn::Ok,
};
*/
let decoder = gstreamer::ElementFactory::find("decodebin")
.unwrap()
.load()
.unwrap()
.create()
.build()
.unwrap();
return PadProbeReturn::Ok;
let volume = gstreamer::ElementFactory::find("volume")
.unwrap()
.load()
.unwrap()
.create()
.property("mute", false)
.property("volume", 0.5)
.build()
.unwrap();
pipeline.add(&source).unwrap();
pipeline.add(&decoder).unwrap();
pipeline.add(&volume).unwrap();
source.link(&decoder).unwrap();
let next_pad = dest.request_pad_simple("sink_%u").unwrap();
let volume_output = volume.static_pad("src").unwrap();
volume_output.link(&next_pad).unwrap();
decoder.connect_pad_added(
move |element, pad| handle_decoder_started(element, pad, volume.clone())
);
}
fn handle_decoder_started(_: &Element, pad: &Pad, next: Element) {
println!("connecting file decoder to converter stream");
// let next_pad = next.request_pad_simple("sink_%u").unwrap();
let next_pad = next.static_pad("sink").unwrap();
pad.link(&next_pad).unwrap();
}