Add seek forwards/backwards

src/key_bind.rs

@@ -42,10 +42,10 @@ pub fn key_binds() -> HashMap<KeyBind, Action> {
     let mut key_binds = HashMap::new();
 
     macro_rules! bind {
-        ([$($modifier:ident),+ $(,)?], $key_code:ident, $action:ident) => {{
+        ([$($modifier:ident),* $(,)?], $key_code:ident, $action:ident) => {{
             key_binds.insert(
                 KeyBind {
-                    modifiers: vec![$(Modifier::$modifier),+],
+                    modifiers: vec![$(Modifier::$modifier),*],
                     key_code: KeyCode::$key_code,
                 },
                 Action::$action,
@@ -54,6 +54,8 @@ pub fn key_binds() -> HashMap<KeyBind, Action> {
     }
 
     //TODO: key bindings
+    bind!([], Left, SeekBackward);
+    bind!([], Right, SeekForward);
 
     key_binds
 }

src/main.rs

@@ -19,20 +19,21 @@ use std::{
     env,
     path::PathBuf,
     process,
-    sync::{Arc, Mutex},
+    sync::{mpsc, Arc, Mutex},
     time::Instant,
 };
 
 use config::{AppTheme, Config, CONFIG_VERSION};
 mod config;
 
-mod ffmpeg;
-
 use key_bind::{key_binds, KeyBind};
 mod key_bind;
 
 mod localize;
 
+use player::{PlayerMessage, VideoFrame};
+mod player;
+
 /// Runs application with these settings
 #[rustfmt::skip]
 fn main() -> Result<(), Box<dyn std::error::Error>> {
@@ -66,7 +67,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         }
     };
 
-    let video_frame_lock = ffmpeg::run(path);
+    let (player_tx, video_frame_lock) = player::run(path);
 
     let mut settings = Settings::default();
     settings = settings.theme(config.app_theme.theme());
@@ -83,7 +84,8 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let flags = Flags {
         config_handler,
         config,
-        video_frame_lock
+        player_tx,
+        video_frame_lock,
     };
     cosmic::app::run::<App>(settings, flags)?;
 
@@ -93,12 +95,16 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub enum Action {
     Todo,
+    SeekBackward,
+    SeekForward,
 }
 
 impl Action {
     pub fn message(&self) -> Message {
         match self {
             Self::Todo => Message::Todo,
+            Self::SeekBackward => Message::Player(PlayerMessage::SeekRelative(-10.0)),
+            Self::SeekForward => Message::Player(PlayerMessage::SeekRelative(10.0)),
         }
     }
 }
@@ -107,7 +113,8 @@ impl Action {
 pub struct Flags {
     config_handler: Option<cosmic_config::Config>,
     config: Config,
-    video_frame_lock: Arc<Mutex<Option<ffmpeg::VideoFrame>>>,
+    player_tx: mpsc::Sender<PlayerMessage>,
+    video_frame_lock: Arc<Mutex<Option<VideoFrame>>>,
 }
 
 /// Messages that are used specifically by our [`App`].
@@ -117,6 +124,7 @@ pub enum Message {
     AppTheme(AppTheme),
     Config(Config),
     Key(Modifiers, KeyCode),
+    Player(PlayerMessage),
     SystemThemeModeChange(cosmic_theme::ThemeMode),
     Tick(Instant),
     ToggleContextPage(ContextPage),
@@ -281,6 +289,9 @@ impl Application for App {
                     }
                 }
             }
+            Message::Player(player_message) => {
+                self.flags.player_tx.send(player_message).unwrap();
+            }
             Message::SystemThemeModeChange(_theme_mode) => {
                 return self.update_config();
             }

src/player.rs

@@ -10,10 +10,11 @@ use ffmpeg::{
     media::Type,
     software::{resampling, scaling},
     util::{
-        channel_layout,
+        channel_layout, error,
         format::sample,
         frame::{audio::Audio, video::Video},
     },
+    Packet,
 };
 use std::{
     collections::VecDeque,
@@ -25,6 +26,11 @@ use std::{
     time::{Duration, Instant},
 };
 
+#[derive(Clone, Debug)]
+pub enum PlayerMessage {
+    SeekRelative(f64),
+}
+
 pub struct VideoFrame(pub Video);
 
 impl VideoFrame {
@@ -143,6 +149,7 @@ where
 
 fn ffmpeg_thread<P: AsRef<Path>>(
     path: P,
+    player_rx: mpsc::Receiver<PlayerMessage>,
     video_frame_lock: Arc<Mutex<Option<VideoFrame>>>,
     audio_config: cpal::SupportedStreamConfig,
     audio_queue_lock: Arc<Mutex<VecDeque<f32>>>,
@@ -329,13 +336,39 @@ fn ffmpeg_thread<P: AsRef<Path>>(
             Ok(())
         };
 
-    for (stream, packet) in ictx.packets() {
-        let start = Instant::now();
-        if stream.index() == video_stream_index {
-            video_packet_tx.send(packet).unwrap();
-        } else if stream.index() == audio_stream_index {
-            audio_decoder.send_packet(&packet)?;
-            receive_and_process_decoded_audio_frames(&mut audio_decoder)?;
+    loop {
+        let mut pts_opt = None;
+        let mut packet = Packet::empty();
+        match packet.read(&mut ictx) {
+            Ok(()) => {
+                pts_opt = packet.pts();
+                if packet.stream() == video_stream_index {
+                    video_packet_tx.send(packet).unwrap();
+                } else if packet.stream() == audio_stream_index {
+                    audio_decoder.send_packet(&packet)?;
+                    receive_and_process_decoded_audio_frames(&mut audio_decoder)?;
+                }
+            }
+            Err(error::Error::Eof) => break,
+            Err(_err) => {}
+        }
+
+        while let Ok(message) = player_rx.try_recv() {
+            match message {
+                PlayerMessage::SeekRelative(seek_seconds) => {
+                    if let Some(pts) = pts_opt {
+                        //TODO: use time base instead of hardcoded values
+                        let timestamp = (pts + (seek_seconds * 1000.0) as i64) * 1000;
+                        if seek_seconds.is_sign_negative() {
+                            println!("backwards {} = {}", seek_seconds, timestamp);
+                            ictx.seek(timestamp, ..timestamp)?;
+                        } else {
+                            println!("forwards {} = {}", seek_seconds, timestamp);
+                            ictx.seek(timestamp, timestamp..)?;
+                        }
+                    }
+                }
+            }
         }
     }
 
@@ -345,18 +378,26 @@ fn ffmpeg_thread<P: AsRef<Path>>(
     Ok(())
 }
 
-pub fn run(path: PathBuf) -> Arc<Mutex<Option<VideoFrame>>> {
+pub fn run(path: PathBuf) -> (mpsc::Sender<PlayerMessage>, Arc<Mutex<Option<VideoFrame>>>) {
     ffmpeg::init().unwrap();
 
     let audio_queue_lock = Arc::new(Mutex::new(VecDeque::new()));
     let audio_config = cpal(audio_queue_lock.clone());
 
+    let (player_tx, player_rx) = mpsc::channel();
     let video_frame_lock = Arc::new(Mutex::new(None));
     {
         let video_frame_lock = video_frame_lock.clone();
         thread::spawn(move || {
-            ffmpeg_thread(path, video_frame_lock, audio_config, audio_queue_lock).unwrap();
+            ffmpeg_thread(
+                path,
+                player_rx,
+                video_frame_lock,
+                audio_config,
+                audio_queue_lock,
+            )
+            .unwrap();
         });
     }
-    video_frame_lock
+    (player_tx, video_frame_lock)
 }