631 lines
14 KiB
Rust
631 lines
14 KiB
Rust
use std::{
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fs::File,
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sync::{
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Arc,
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Condvar,
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Mutex,
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mpsc,
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},
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thread::{
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self,
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},
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time::{Instant},
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};
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use anyhow::{
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anyhow,
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bail,
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Result,
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};
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use cpal::traits::{
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DeviceTrait,
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HostTrait,
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StreamTrait,
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};
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use fltk::{
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app,
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button::Button,
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enums::CallbackTrigger,
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frame::Frame,
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group::Flex,
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prelude::*,
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window::Window,
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};
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mod decoder;
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mod net_reader;
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const BUFFER_SIZE: usize = 5_000;
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fn main () -> Result <()> {
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let args: Vec <_> = std::env::args ().collect ();
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match args.get (1).map (|s| &s[..]) {
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None => bail! ("First argument must be a subcommand like `play`"),
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Some ("debug-net") => cmd_debug_net (&args [1..]),
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Some ("gui") => cmd_gui (&args [1..]),
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Some ("play") => cmd_play (&args [1..]),
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Some (_) => bail! ("Unrecognized subcommand"),
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}
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}
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fn cmd_debug_net (args: &[String]) -> Result <()> {
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tracing_subscriber::fmt::init ();
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let mut urls: Vec <_> = args.iter ().skip (1).map (|s| s.to_string ()).collect ();
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urls.reverse ();
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let (fltk_tx, fltk_rx) = app::channel::<Message> ();
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let app = app::App::default ();
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let window_title = "Music Player".to_string ();
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let mut wind = Window::new (100, 100, 300, 300, None)
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.with_label (&window_title);
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wind.make_resizable (true);
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wind.end ();
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wind.show ();
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let mut shared_state = SharedState::default ();
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let silence = vec! [0; 12_000 * 4 * 2];
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shared_state.pcm_buffers.produce_bytes (silence);
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let shared_state = Arc::new ((Mutex::new (shared_state), Condvar::new ()));
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let thread_decoder = DecoderThread::new (
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Arc::clone (&shared_state),
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Some (fltk_tx.clone ()),
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);
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let mut audio_output = AudioOutput::new (
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Arc::clone (&shared_state),
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thread_decoder.tx.clone (),
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)?;
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if let Some (url) = urls.pop () {
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thread_decoder.tx.send (MessageToDecoder::SetUrl (url))?;
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}
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else {
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bail! ("No URLs to play");
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}
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while app.wait () {
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tracing::trace! ("Main thread is waiting on messages...");
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let msg = match fltk_rx.recv () {
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None => continue,
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Some (x) => x,
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};
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match msg {
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Message::DecoderStatus (x) => {
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if ! x {
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tracing::debug! ("decoder ended");
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if let Some (url) = urls.pop () {
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thread_decoder.tx.send (MessageToDecoder::SetUrl (url))?;
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}
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else {
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break;
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}
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}
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},
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_ => {},
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}
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}
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audio_output.pause ()?;
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thread_decoder.tx.send (MessageToDecoder::Quit)?;
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thread_decoder.join ()?;
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Ok (())
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}
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#[derive (Default)]
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pub struct SharedState {
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pub pcm_buffers: decoder::PcmBuffers,
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}
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struct Gui {
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intend_to_play: bool,
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can_decode: bool,
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audio_is_streaming: bool,
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trying_to_stream: bool,
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but_pause: Button,
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but_play: Button,
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}
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fn set_active <W: WidgetExt> (w: &mut W, b: bool) {
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if b {
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w.activate ();
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}
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else {
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w.deactivate ();
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}
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}
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impl Gui {
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pub fn sync (&mut self) {
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set_active (
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&mut self.but_pause,
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self.intend_to_play,
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);
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set_active (
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&mut self.but_play,
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! self.intend_to_play &&
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self.can_decode
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);
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}
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}
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#[derive (Clone, Copy, Debug)]
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enum Message {
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DecoderStatus (bool),
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RawPlay,
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RawPause,
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RawSet,
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RawSkip,
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}
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fn cmd_gui (args: &[String]) -> Result <()> {
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use std::io::BufRead;
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tracing_subscriber::fmt::init ();
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let playlist = {
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let mut files = Vec::with_capacity (2000);
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let file = File::open ("/home/user/music/playlist.m3u")?;
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let reader = std::io::BufReader::new (file);
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for line in reader.lines () {
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files.push (line?);
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}
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files
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};
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let filenames: Vec <_> = args.iter ()
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.skip (1)
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.map (|s| s.to_string ())
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.collect ();
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let (fltk_tx, fltk_rx) = app::channel::<Message> ();
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let app = app::App::default ();
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let window_title = "Music Player".to_string ();
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let mut wind = Window::new (100, 100, 600, 600, None)
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.with_label (&window_title);
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wind.make_resizable (true);
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let mut col = Flex::default ().column ().size_of_parent ();
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{
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let mut row = Flex::default ().row ();
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let mut label = Frame::default ().with_label ("Audio output");
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let mut but_audio_play = Button::default ().with_label ("Play");
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let mut but_audio_pause = Button::default ().with_label ("Pause");
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row.set_size (&mut label, 100);
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row.set_size (&mut but_audio_play, 100);
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row.set_size (&mut but_audio_pause, 100);
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but_audio_play.set_trigger (CallbackTrigger::Release);
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but_audio_pause.set_trigger (CallbackTrigger::Release);
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but_audio_play.emit (fltk_tx, Message::RawPlay);
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but_audio_pause.emit (fltk_tx, Message::RawPause);
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row.end ();
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col.add (&row);
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col.set_size (&mut row, 30);
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}
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{
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let mut row = Flex::default ().row ();
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let mut label = Frame::default ().with_label ("Decoder");
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let mut but_set = Button::default ().with_label ("Set");
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let mut but_skip = Button::default ().with_label ("Skip");
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row.set_size (&mut label, 100);
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row.set_size (&mut but_set, 100);
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row.set_size (&mut but_skip, 100);
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but_set.set_trigger (CallbackTrigger::Release);
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but_skip.set_trigger (CallbackTrigger::Release);
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but_set.emit (fltk_tx, Message::RawSet);
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but_skip.emit (fltk_tx, Message::RawSkip);
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row.end ();
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col.add (&row);
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col.set_size (&mut row, 30);
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}
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col.end ();
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wind.end ();
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wind.show ();
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let mut shared_state = SharedState::default ();
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let silence = vec! [0; 12_000 * 4 * 2];
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shared_state.pcm_buffers.produce_bytes (silence);
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let shared_state = Arc::new ((Mutex::new (shared_state), Condvar::new ()));
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let thread_decoder = DecoderThread::new (
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Arc::clone (&shared_state),
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Some (fltk_tx.clone ()),
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);
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let mut audio_output = AudioOutput::new (
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Arc::clone (&shared_state),
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thread_decoder.tx.clone (),
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)?;
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// Doesn't work.
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// audio_output.pause ()?;
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/*
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for filename in filenames {
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//gui.can_decode = true;
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thread_decoder.tx.send (MessageToDecoder::QueueFile (filename))?;
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}
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*/
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// let mut play_queue = vec! [];
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let mut current_file = None;
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while app.wait () {
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let msg = match fltk_rx.recv () {
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None => continue,
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Some (x) => x,
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};
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match msg {
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Message::DecoderStatus (x) => {
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if ! x {
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tracing::info! ("Decoder ran dry");
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current_file = None;
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}
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},
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Message::RawPlay => {
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audio_output.play ()?;
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},
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Message::RawPause => {
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audio_output.pause ()?;
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},
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Message::RawSet => {
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use rand::Rng;
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let idx = rand::thread_rng ().gen_range (0..playlist.len ());
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let filename = &playlist [idx];
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tracing::info! ("Set decoder to {}", filename);
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thread_decoder.tx.send (MessageToDecoder::SetFile (format! ("/home/user/music/{}", filename)))?;
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current_file = Some (filename);
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},
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Message::RawSkip => {
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thread_decoder.tx.send (MessageToDecoder::Clear)?;
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},
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}
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}
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tracing::info! ("Received FLTK quit signal");
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audio_output.pause ()?;
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tracing::debug! ("Joining decoder thread...");
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thread_decoder.tx.send (MessageToDecoder::Quit)?;
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thread_decoder.join ()?;
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tracing::debug! ("Joining PCM thread...");
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drop (audio_output);
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tracing::info! ("Exiting cleanly.");
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Ok (())
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}
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fn cmd_play (args: &[String]) -> Result <()> {
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unimplemented! ();
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/*
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tracing_subscriber::fmt::init ();
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let filenames: Vec <_> = args.iter ()
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.skip (1)
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.map (|s| s.to_string ())
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.collect ();
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// let (decoder_tx, decoder_rx) = mpsc::sync_channel (1);
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let (main_tx, main_rx) = mpsc::sync_channel (1);
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let shared_state = Arc::new ((Mutex::new (SharedState::default ()), Condvar::new ()));
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let pcm_quit = Arc::new ((Mutex::new (false), Condvar::new ()));
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let thread_decoder = DecoderThread::new (
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Arc::clone (&shared_state),
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main_tx.clone (),
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);
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let audio_output = AudioOutput::new (
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Arc::clone (&pcm_quit),
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Arc::clone (&shared_state),
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thread_decoder.tx.clone (),
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)?;
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for filename in filenames {
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thread_decoder.tx.send (MessageToDecoder::QueueFile (filename))?;
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}
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while let Ok (msg) = main_rx.recv () { match msg {
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MessageToMain::DecoderEmpty => break,
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}}
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tracing::debug! ("Asking decoder to quit...");
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thread_decoder.tx.send (MessageToDecoder::Quit)?;
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tracing::debug! ("Joining decoder thread...");
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thread_decoder.join ()?;
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tracing::debug! ("Joining PCM thread...");
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drop (audio_output);
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tracing::info! ("Exiting cleanly.");
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Ok (())
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*/
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}
|
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struct DecoderThread {
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join_handle: thread::JoinHandle <Result <()>>,
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pub tx: mpsc::SyncSender <MessageToDecoder>,
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}
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enum MessageToDecoder {
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NeedPcm,
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SetFile (String),
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SetUrl (String),
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Clear,
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Quit,
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}
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enum Decoder {
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File (decoder::Decoder <decoder::FfmpegDemuxer>),
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Http (decoder::Decoder <decoder::HttpOggDemuxer>),
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}
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|
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impl DecoderThread {
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pub fn new (
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shared_state: Arc <(Mutex <SharedState>, Condvar)>,
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main_tx: Option <fltk::app::Sender <Message>>,
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) -> Self
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{
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let (tx, rx) = mpsc::sync_channel (4);
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let self_tx = tx.clone ();
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let join_handle = thread::spawn (move|| {
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let mut decoder: Option <Decoder> = None;
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'thread: while let Ok (msg) = rx.recv () { match msg {
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MessageToDecoder::Clear => {
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decoder = None;
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let new_buffers = decoder::PcmBuffers::default ();
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self_tx.send (MessageToDecoder::NeedPcm)?;
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let mut shared_state = shared_state.0.lock ().unwrap ();
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shared_state.pcm_buffers = new_buffers;
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},
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MessageToDecoder::NeedPcm => {
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// tracing::trace! ("DecoderThread recv'd NeedPcm");
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let mut bytes_produced = 0;
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let mut status = false;
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'pipeline: while bytes_produced < BUFFER_SIZE * 4 * 2 {
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// tracing::trace! ("Pumping multi-file decode pipeline");
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let frame = match &mut decoder {
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None => None,
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Some (Decoder::File (x)) => x.next ()?,
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Some (Decoder::Http (x)) => x.next ()?,
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};
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if let Some (frame) = frame {
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// tracing::trace! ("Decoded bytes");
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status = true;
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let mut shared_state = shared_state.0.lock ().unwrap ();
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bytes_produced += frame.data ().len ();
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shared_state.pcm_buffers.produce_bytes (frame.data ().into ());
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continue 'pipeline;
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}
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else if decoder.is_some () {
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decoder = None;
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tracing::trace! ("Decoder ended, telling main thread");
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main_tx.as_ref ().map (|x| x.send (Message::DecoderStatus (false)));
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}
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{
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// tracing::trace! ("Decoder thread is producing silence");
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let frame = vec! [0; 2_000 * 4 * 2];
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{
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let mut shared_state = shared_state.0.lock ().unwrap ();
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|
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bytes_produced += frame.len ();
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shared_state.pcm_buffers.produce_bytes (frame);
|
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// tracing::trace! ("PCM buffer: {}", shared_state.pcm_buffers.samples_available ());
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}
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status = false;
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continue 'pipeline;
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}
|
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}
|
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},
|
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MessageToDecoder::SetFile (x) => {
|
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let (demuxer, codec) = decoder::FfmpegDemuxer::new (&x)?;
|
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decoder = Some (Decoder::File (decoder::Decoder::new (demuxer, codec)?));
|
|
|
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let new_buffers = decoder::PcmBuffers::default ();
|
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self_tx.send (MessageToDecoder::NeedPcm)?;
|
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let mut shared_state = shared_state.0.lock ().unwrap ();
|
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shared_state.pcm_buffers = new_buffers;
|
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},
|
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MessageToDecoder::SetUrl (x) => {
|
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let (demuxer, codec) = decoder::HttpOggDemuxer::new (x)?;
|
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decoder = Some (Decoder::Http (decoder::Decoder::new (demuxer, codec)?));
|
|
|
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let new_buffers = decoder::PcmBuffers::default ();
|
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self_tx.send (MessageToDecoder::NeedPcm)?;
|
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let mut shared_state = shared_state.0.lock ().unwrap ();
|
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shared_state.pcm_buffers = new_buffers;
|
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},
|
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MessageToDecoder::Quit => {
|
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tracing::debug! ("DecoderThread recv'd Quit");
|
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break 'thread;
|
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},
|
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}}
|
|
|
|
tracing::info! ("Decoder thread quit gracefully");
|
|
|
|
Ok::<_, anyhow::Error> (())
|
|
});
|
|
|
|
Self {
|
|
join_handle,
|
|
tx,
|
|
}
|
|
}
|
|
|
|
pub fn join (self) -> Result <()> {
|
|
self.join_handle.join ().unwrap ()
|
|
}
|
|
}
|
|
|
|
struct AudioOutput {
|
|
_host: cpal::Host,
|
|
_device: cpal::Device,
|
|
stream: cpal::Stream,
|
|
}
|
|
|
|
impl AudioOutput {
|
|
pub fn new (
|
|
shared_state: Arc <(Mutex <SharedState>, Condvar)>,
|
|
decoder_tx: mpsc::SyncSender <MessageToDecoder>,
|
|
) -> Result <Self>
|
|
{
|
|
let host = cpal::default_host ();
|
|
let device = host.default_output_device ().ok_or_else (|| anyhow! ("can't open cpal device"))?;
|
|
|
|
let mut supported_configs_range = device.supported_output_configs ()?
|
|
.filter (|c| c.channels () == 2 && c.sample_format () == cpal::SampleFormat::F32);
|
|
|
|
let config = supported_configs_range.next ()
|
|
.ok_or_else (|| anyhow! ("can't get stereo f32 audio output"))?
|
|
.with_sample_rate (cpal::SampleRate (decoder::SAMPLE_RATE))
|
|
.config ();
|
|
|
|
let stream = device.build_output_stream (
|
|
&config,
|
|
move |data: &mut [f32], _: &cpal::OutputCallbackInfo| {
|
|
let (lock, _) = &*shared_state;
|
|
|
|
let time_start = Instant::now ();
|
|
let need_pcm;
|
|
let status;
|
|
{
|
|
let mut decoder_state = match lock.lock () {
|
|
Ok (x) => x,
|
|
Err (_) => return,
|
|
};
|
|
let time_stop = Instant::now ();
|
|
let dur = time_stop - time_start;
|
|
if dur.as_micros () > 100 {
|
|
tracing::warn! ("PCM thread waited {} us for a lock", dur.as_micros ());
|
|
}
|
|
|
|
let pcm_buffers = &mut decoder_state.pcm_buffers;
|
|
|
|
if ! pcm_buffers.consume_exact (data) {
|
|
tracing::warn! ("PCM buffer underflow");
|
|
status = false;
|
|
|
|
for x in data {
|
|
*x = 0.0;
|
|
}
|
|
}
|
|
else {
|
|
status = true;
|
|
}
|
|
|
|
need_pcm = pcm_buffers.samples_available () < BUFFER_SIZE;
|
|
}
|
|
|
|
if need_pcm {
|
|
decoder_tx.try_send (MessageToDecoder::NeedPcm).ok ();
|
|
// tracing::trace! ("AudioOutput sent NeedPcm");
|
|
}
|
|
},
|
|
move |err| {
|
|
tracing::error! ("{:?}", err);
|
|
},
|
|
)?;
|
|
|
|
Ok (Self {
|
|
_host: host,
|
|
_device: device,
|
|
stream,
|
|
})
|
|
}
|
|
|
|
pub fn play (&mut self) -> Result <()> {
|
|
Ok (self.stream.play ()?)
|
|
}
|
|
|
|
pub fn pause (&mut self) -> Result <()> {
|
|
Ok (self.stream.pause ()?)
|
|
}
|
|
}
|
|
|
|
#[cfg (test)]
|
|
mod test {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn decode () -> Result <()> {
|
|
ffmpeg_next::init ()?;
|
|
|
|
let mut input_ctx = ffmpeg_next::format::input (&"test.opus")?;
|
|
let stream = input_ctx
|
|
.streams ()
|
|
.best (ffmpeg_next::media::Type::Audio)
|
|
.ok_or_else (|| anyhow! ("can't find good audio stream"))?;
|
|
let best_stream_idx = stream.index ();
|
|
|
|
let mut decoder = stream.codec ().decoder ().audio ()?;
|
|
|
|
let mut packet_count = 0;
|
|
let mut frame_count = 0;
|
|
let mut frame = ffmpeg_next::util::frame::Audio::empty ();
|
|
|
|
let mut packets = input_ctx.packets ();
|
|
|
|
loop {
|
|
let mut did_anything = false;
|
|
|
|
while decoder.receive_frame (&mut frame).is_ok () {
|
|
frame_count += 1;
|
|
did_anything = true;
|
|
}
|
|
|
|
match packets.next () {
|
|
None => {},
|
|
Some ((stream, packet)) => {
|
|
did_anything = true;
|
|
if stream.index () == best_stream_idx {
|
|
packet_count += 1;
|
|
decoder.send_packet (&packet)?;
|
|
}
|
|
},
|
|
}
|
|
|
|
if ! did_anything {
|
|
break;
|
|
}
|
|
}
|
|
|
|
Ok (())
|
|
}
|
|
}
|