refactor: merge plugin, sampler -> mixer; transport -> sequencer; time -> core

crates/tek_mixer/src/sample_add.rs

@@ -0,0 +1,279 @@
+use super::*;
+
+use std::fs::File;
+use symphonia::core::codecs::CODEC_TYPE_NULL;
+use symphonia::core::errors::Error;
+use symphonia::core::io::MediaSourceStream;
+use symphonia::core::probe::Hint;
+use symphonia::core::audio::SampleBuffer;
+use symphonia::default::get_codecs;
+
+pub struct AddSampleModal {
+    exited:  bool,
+    dir:     PathBuf,
+    subdirs: Vec<OsString>,
+    files:   Vec<OsString>,
+    cursor:  usize,
+    offset:  usize,
+    sample:  Arc<RwLock<Sample>>,
+    voices:  Arc<RwLock<Vec<Voice>>>,
+    _search: Option<String>,
+}
+
+exit!(AddSampleModal);
+
+render!(AddSampleModal |self,buf,area|{
+    make_dim(buf);
+    let area = center_box(
+        area,
+        64.max(area.width.saturating_sub(8)),
+        20.max(area.width.saturating_sub(8)),
+    );
+    fill_fg(buf, area, Color::Reset);
+    fill_bg(buf, area, Nord::bg_lo(true, true));
+    fill_char(buf, area, ' ');
+    format!("{}", &self.dir.to_string_lossy())
+        .blit(buf, area.x+2, area.y+1, Some(Style::default().bold()))?;
+    "Select sample:"
+        .blit(buf, area.x+2, area.y+2, Some(Style::default().bold()))?;
+    for (i, (is_dir, name)) in self.subdirs.iter()
+        .map(|path|(true, path))
+        .chain(self.files.iter().map(|path|(false, path)))
+        .enumerate()
+        .skip(self.offset)
+    {
+        if i >= area.height as usize - 4 {
+            break
+        }
+        let t = if is_dir { "" } else { "" };
+        let line = format!("{t} {}", name.to_string_lossy());
+        let line = &line[..line.len().min(area.width as usize - 4)];
+        line.blit(buf, area.x + 2, area.y + 3 + i as u16, Some(if i == self.cursor {
+            Style::default().green()
+        } else {
+            Style::default().white()
+        }))?;
+    }
+    Lozenge(Style::default()).draw(buf, area)
+});
+
+handle!(AddSampleModal |self,e|{
+    if handle_keymap(self, e, KEYMAP_ADD_SAMPLE)? {
+        return Ok(true)
+    }
+    Ok(true)
+});
+
+impl AddSampleModal {
+    pub fn new (
+        sample: &Arc<RwLock<Sample>>,
+        voices: &Arc<RwLock<Vec<Voice>>>
+    ) -> Usually<Self> {
+        let dir = std::env::current_dir()?;
+        let (subdirs, files) = scan(&dir)?;
+        Ok(Self {
+            exited: false,
+            dir,
+            subdirs,
+            files,
+            cursor: 0,
+            offset: 0,
+            sample: sample.clone(),
+            voices: voices.clone(),
+            _search: None
+        })
+    } 
+    fn rescan (&mut self) -> Usually<()> {
+        scan(&self.dir).map(|(subdirs, files)|{
+            self.subdirs = subdirs;
+            self.files = files;
+        })
+    }
+    fn prev (&mut self) {
+        self.cursor = self.cursor.saturating_sub(1);
+    }
+    fn next (&mut self) {
+        self.cursor = self.cursor + 1;
+    }
+    fn try_preview (&mut self) -> Usually<()> {
+        if let Some(path) = self.cursor_file() {
+            if let Ok(sample) = Sample::from_file(&path) {
+                *self.sample.write().unwrap() = sample;
+                self.voices.write().unwrap().push(
+                    Sample::play(&self.sample, 0, &u7::from(100u8))
+                );
+            }
+            //load_sample(&path)?;
+            //let src = std::fs::File::open(&path)?;
+            //let mss = MediaSourceStream::new(Box::new(src), Default::default());
+            //let mut hint = Hint::new();
+            //if let Some(ext) = path.extension() {
+                //hint.with_extension(&ext.to_string_lossy());
+            //}
+            //let meta_opts: MetadataOptions = Default::default();
+            //let fmt_opts: FormatOptions = Default::default();
+            //if let Ok(mut probed) =  symphonia::default::get_probe()
+                //.format(&hint, mss, &fmt_opts, &meta_opts)
+            //{
+                //panic!("{:?}", probed.format.metadata());
+            //};
+        }
+        Ok(())
+    }
+    fn cursor_dir (&self) -> Option<PathBuf> {
+        if self.cursor < self.subdirs.len() {
+            Some(self.dir.join(&self.subdirs[self.cursor]))
+        } else {
+            None
+        }
+    }
+    fn cursor_file (&self) -> Option<PathBuf> {
+        if self.cursor < self.subdirs.len() {
+            return None
+        }
+        let index = self.cursor.saturating_sub(self.subdirs.len());
+        if index < self.files.len() {
+            Some(self.dir.join(&self.files[index]))
+        } else {
+            None
+        }
+    }
+    fn pick (&mut self) -> Usually<bool> {
+        if self.cursor == 0 {
+            if let Some(parent) = self.dir.parent() {
+                self.dir = parent.into();
+                self.rescan()?;
+                self.cursor = 0;
+                return Ok(false)
+            }
+        }
+        if let Some(dir) = self.cursor_dir() {
+            self.dir = dir;
+            self.rescan()?;
+            self.cursor = 0;
+            return Ok(false)
+        }
+        if let Some(path) = self.cursor_file() {
+            let (end, channels) = read_sample_data(&path.to_string_lossy())?;
+            let mut sample = self.sample.write().unwrap();
+            sample.name = path.file_name().unwrap().to_string_lossy().into();
+            sample.end = end;
+            sample.channels = channels;
+            return Ok(true)
+        }
+        return Ok(false)
+    }
+}
+
+pub const KEYMAP_ADD_SAMPLE: &'static [KeyBinding<AddSampleModal>] = keymap!(AddSampleModal {
+    [Esc,   NONE, "sampler/add/close", "close help dialog",       |modal: &mut AddSampleModal|{
+        modal.exit();
+        Ok(true)
+    }],
+    [Up,    NONE, "sampler/add/prev",  "select previous entry",   |modal: &mut AddSampleModal|{
+        modal.prev();
+        Ok(true)
+    }],
+    [Down,  NONE, "sampler/add/next",  "select next entry",       |modal: &mut AddSampleModal|{
+        modal.next();
+        Ok(true)
+    }],
+    [Enter, NONE, "sampler/add/enter", "activate selected entry", |modal: &mut AddSampleModal|{
+        if modal.pick()? {
+            modal.exit();
+        }
+        Ok(true)
+    }],
+    [Char('p'), NONE, "sampler/add/preview", "preview selected entry", |modal: &mut AddSampleModal|{
+        modal.try_preview()?;
+        Ok(true)
+    }]
+});
+
+fn scan (dir: &PathBuf) -> Usually<(Vec<OsString>, Vec<OsString>)> {
+    let (mut subdirs, mut files) = read_dir(dir)?
+        .fold((vec!["..".into()], vec![]), |(mut subdirs, mut files), entry|{
+            let entry = entry.expect("failed to read drectory entry");
+            let meta = entry.metadata().expect("failed to read entry metadata");
+            if meta.is_file() {
+                files.push(entry.file_name());
+            } else if meta.is_dir() {
+                subdirs.push(entry.file_name());
+            }
+            (subdirs, files)
+        });
+    subdirs.sort();
+    files.sort();
+    Ok((subdirs, files))
+}
+
+impl Sample {
+    fn from_file (path: &PathBuf) -> Usually<Self> {
+        let mut sample = Self::default();
+        sample.name = path.file_name().unwrap().to_string_lossy().into();
+        // Use file extension if present
+        let mut hint = Hint::new();
+        if let Some(ext) = path.extension() {
+            hint.with_extension(&ext.to_string_lossy());
+        }
+        let probed = symphonia::default::get_probe().format(
+            &hint,
+            MediaSourceStream::new(
+                Box::new(File::open(path)?),
+                Default::default(),
+            ),
+            &Default::default(),
+            &Default::default()
+        )?;
+        let mut format = probed.format;
+        let mut decoder = get_codecs().make(
+            &format.tracks().iter()
+                .find(|t| t.codec_params.codec != CODEC_TYPE_NULL)
+                .expect("no tracks found")
+                .codec_params,
+            &Default::default()
+        )?;
+        loop {
+            match format.next_packet() {
+                Ok(packet) => {
+                    // Decode a packet
+                    let decoded = match decoder.decode(&packet) {
+                        Ok(decoded) => decoded,
+                        Err(err) => { return Err(err.into()); }
+                    };
+                    // Determine sample rate
+                    let spec = *decoded.spec();
+                    if let Some(rate) = sample.rate {
+                        if rate != spec.rate as usize {
+                            panic!("sample rate changed");
+                        }
+                    } else {
+                        sample.rate = Some(spec.rate as usize);
+                    }
+                    // Determine channel count
+                    while sample.channels.len() < spec.channels.count() {
+                        sample.channels.push(vec![]);
+                    }
+                    // Load sample
+                    let mut samples = SampleBuffer::new(
+                        decoded.frames() as u64,
+                        spec
+                    );
+                    if samples.capacity() > 0 {
+                        samples.copy_interleaved_ref(decoded);
+                        for frame in samples.samples().chunks(spec.channels.count()) {
+                            for (chan, frame) in frame.iter().enumerate() {
+                                sample.channels[chan].push(*frame)
+                            }
+                        }
+                    }
+                },
+                Err(Error::IoError(_)) => break decoder.last_decoded(),
+                Err(err) => return Err(err.into()),
+            };
+        };
+        sample.end = sample.channels.iter().fold(0, |l, c|l + c.len());
+        Ok(sample)
+    }
+}
+