Measure time. Experiment with switching sinks

gm-dash/server/src/bin/enumerate-audio-sinks.rs

@@ -10,8 +10,10 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         .add_listener_local()
         .global(|global| {
             if global.props.and_then(|p| p.get("media.class")) == Some("Audio/Sink"){
+                // println!("{:?}", global.props.map(|p| p));
                 println!(
-                    "\t{:?} {:?}",
+                    "\t{:?} {:?} {:?}",
+                    global.props.and_then(|p| p.get("node.name")),
                     global.props.and_then(|p| p.get("node.description")),
                     global.props.and_then(|p| p.get("media.class"))
                 );

gm-dash/server/src/bin/play-track.rs

@@ -1,4 +1,6 @@
-use gstreamer::{prelude::*, Element, Pad};
+use std::time::Duration;
+
+use gstreamer::{prelude::*, Element, MessageType, MessageView, Pad};
 use pipewire::{context::Context, main_loop::MainLoop};
 
 fn main() {
@@ -11,10 +13,7 @@ fn main() {
         .unwrap()
         .create()
         .name("source")
-        .property(
+        .property("location", "/home/savanni/Music/tavern-music.ogg")
-            "location",
-            "/home/savanni/Music/tavern-music.ogg",
-        )
         // .property(
         //     "location",
         //     "/home/savanni/Music/Night at Work _ Instrumental Chill Music Mix [n9Y2Eb4BaSg].m4a",
@@ -29,12 +28,15 @@ fn main() {
         .name("decoder")
         .build()
         .unwrap();
-    let sink = gstreamer::ElementFactory::find("autoaudiosink")
+    let sinkfactory = gstreamer::ElementFactory::find("pulsesink")
         .unwrap()
         .load()
-        .unwrap()
+        .unwrap();
+    let defaultsink = sinkfactory.create().name("sink").build().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")
@@ -56,17 +58,20 @@ fn main() {
 
     let pipeline = gstreamer::Pipeline::new();
     pipeline.add(&source).unwrap();
-    pipeline.add(&sink).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(&sink).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| {
@@ -81,14 +86,77 @@ fn main() {
     // 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],
     // );
-    while let Some(msg) = bus.timed_pop(gstreamer::ClockTime::NONE) {
+    /*
-        println!("message: {:?}", msg);
+     */
+    /*
+    std::thread::spawn({
+        let pipeline = pipeline.clone();
+        move || {
+            std::thread::sleep(Duration::new(1, 0));
+            println!("{:?}", pipeline);
+        }
+    });
+    */
+
+    let mut playing = false;
+
+    loop {
+        if let Some(msg) = bus.timed_pop_filtered(
+            gstreamer::ClockTime::from_mseconds(100),
+            &[
+                MessageType::Error,
+                MessageType::Eos,
+                MessageType::Progress,
+                MessageType::StateChanged,
+                MessageType::StructureChange,
+            ],
+        ) {
+            match msg.view() {
+                MessageView::Progress(prog) => {
+                    println!("progress: {:?}", prog);
+                }
+                MessageView::StateChanged(st) => {
+                    if msg.src() == Some(&pipeline_object) {
+                        println!("State changed from {:?} to {:?}", st.old(), st.current());
+                        playing = st.current() == gstreamer::State::Playing;
+                    }
+                }
+                MessageView::StructureChange(change) => {
+                    println!("structure change: {:?}", change);
+                }
+                _ => {
+                    println!("{:?}", msg);
+                }
+            }
+        } else {
+            if playing {
+                let mut q = gstreamer::query::Position::new(gstreamer::Format::Time);
+                pipeline.query(&mut q);
+                println!("Position result: {:?}", q.result());
+            } else {
+                break;
+            }
+        }
     }
 
     pipeline.set_state(gstreamer::State::Null).unwrap();