tek/src/edn.rs

202 lines
6.7 KiB
Rust

use crate::*;
use std::sync::{Arc, RwLock};
use std::collections::BTreeMap;
pub use clojure_reader::edn::Edn;
//pub use clojure_reader::{edn::{read, Edn}, error::Error as EdnError};
/// EDN parsing helper.
#[macro_export] macro_rules! edn {
($edn:ident { $($pat:pat => $expr:expr),* $(,)? }) => {
match $edn { $($pat => $expr),* }
};
($edn:ident in $args:ident { $($pat:pat => $expr:expr),* $(,)? }) => {
for $edn in $args {
edn!($edn { $($pat => $expr),* })
}
};
}
pub trait FromEdn<C>: Sized {
const ID: &'static str;
fn from_edn (context: C, expr: &[Edn<'_>]) -> Usually<Self>;
}
/// Implements the [FromEdn] trait.
#[macro_export] macro_rules! from_edn {
($id:expr => |$context:tt:$Context:ty, $args:ident| -> $T:ty $body:block) => {
impl FromEdn<$Context> for $T {
const ID: &'static str = $id;
fn from_edn <'e> ($context: $Context, $args: &[Edn<'e>]) -> Usually<Self> {
$body
}
}
}
}
from_edn!("sampler" => |jack: &Arc<RwLock<JackClient>>, args| -> crate::Sampler {
let mut name = String::new();
let mut dir = String::new();
let mut samples = BTreeMap::new();
edn!(edn in args {
Edn::Map(map) => {
if let Some(Edn::Str(n)) = map.get(&Edn::Key(":name")) {
name = String::from(*n);
}
if let Some(Edn::Str(n)) = map.get(&Edn::Key(":dir")) {
dir = String::from(*n);
}
},
Edn::List(args) => match args.first() {
Some(Edn::Symbol("sample")) => {
let (midi, sample) = MidiSample::from_edn((jack, &dir), &args[1..])?;
if let Some(midi) = midi {
samples.insert(midi, sample);
} else {
panic!("sample without midi binding: {}", sample.read().unwrap().name);
}
},
_ => panic!("unexpected in sampler {name}: {args:?}")
},
_ => panic!("unexpected in sampler {name}: {edn:?}")
});
Self::new(jack, &name)
});
type MidiSample = (Option<u7>, Arc<RwLock<crate::Sample>>);
from_edn!("sample" => |(_jack, dir): (&Arc<RwLock<JackClient>>, &str), args| -> MidiSample {
let mut name = String::new();
let mut file = String::new();
let mut midi = None;
let mut start = 0usize;
edn!(edn in args {
Edn::Map(map) => {
if let Some(Edn::Str(n)) = map.get(&Edn::Key(":name")) {
name = String::from(*n);
}
if let Some(Edn::Str(f)) = map.get(&Edn::Key(":file")) {
file = String::from(*f);
}
if let Some(Edn::Int(i)) = map.get(&Edn::Key(":start")) {
start = *i as usize;
}
if let Some(Edn::Int(m)) = map.get(&Edn::Key(":midi")) {
midi = Some(u7::from(*m as u8));
}
},
_ => panic!("unexpected in sample {name}"),
});
let (end, data) = Sample::read_data(&format!("{dir}/{file}"))?;
Ok((midi, Arc::new(RwLock::new(crate::Sample {
name,
start,
end,
channels: data,
rate: None,
gain: 1.0
}))))
});
from_edn!("plugin/lv2" => |jack: &Arc<RwLock<JackClient>>, args| -> Plugin {
let mut name = String::new();
let mut path = String::new();
edn!(edn in args {
Edn::Map(map) => {
if let Some(Edn::Str(n)) = map.get(&Edn::Key(":name")) {
name = String::from(*n);
}
if let Some(Edn::Str(p)) = map.get(&Edn::Key(":path")) {
path = String::from(*p);
}
},
_ => panic!("unexpected in lv2 '{name}'"),
});
Plugin::new_lv2(jack, &name, &path)
});
const SYM_NAME: &str = ":name";
const SYM_GAIN: &str = ":gain";
const SYM_SAMPLER: &str = "sampler";
const SYM_LV2: &str = "lv2";
from_edn!("mixer/track" => |jack: &Arc<RwLock<JackClient>>, args| -> MixerTrack {
let mut _gain = 0.0f64;
let mut track = MixerTrack {
name: String::new(),
audio_ins: vec![],
audio_outs: vec![],
devices: vec![],
};
edn!(edn in args {
Edn::Map(map) => {
if let Some(Edn::Str(n)) = map.get(&Edn::Key(SYM_NAME)) {
track.name = n.to_string();
}
if let Some(Edn::Double(g)) = map.get(&Edn::Key(SYM_GAIN)) {
_gain = f64::from(*g);
}
},
Edn::List(args) => match args.first() {
// Add a sampler device to the track
Some(Edn::Symbol(SYM_SAMPLER)) => {
track.devices.push(
Box::new(Sampler::from_edn(jack, &args[1..])?) as Box<dyn MixerTrackDevice>
);
panic!(
"unsupported in track {}: {:?}; tek_mixer not compiled with feature \"sampler\"",
&track.name,
args.first().unwrap()
)
},
// Add a LV2 plugin to the track.
Some(Edn::Symbol(SYM_LV2)) => {
track.devices.push(
Box::new(Plugin::from_edn(jack, &args[1..])?) as Box<dyn MixerTrackDevice>
);
panic!(
"unsupported in track {}: {:?}; tek_mixer not compiled with feature \"plugin\"",
&track.name,
args.first().unwrap()
)
},
None =>
panic!("empty list track {}", &track.name),
_ =>
panic!("unexpected in track {}: {:?}", &track.name, args.first().unwrap())
},
_ => {}
});
Ok(track)
});
//impl ArrangerScene {
////TODO
////pub fn from_edn <'a, 'e> (args: &[Edn<'e>]) -> Usually<Self> {
////let mut name = None;
////let mut clips = vec![];
////edn!(edn in args {
////Edn::Map(map) => {
////let key = map.get(&Edn::Key(":name"));
////if let Some(Edn::Str(n)) = key {
////name = Some(*n);
////} else {
////panic!("unexpected key in scene '{name:?}': {key:?}")
////}
////},
////Edn::Symbol("_") => {
////clips.push(None);
////},
////Edn::Int(i) => {
////clips.push(Some(*i as usize));
////},
////_ => panic!("unexpected in scene '{name:?}': {edn:?}")
////});
////Ok(ArrangerScene {
////name: Arc::new(name.unwrap_or("").to_string().into()),
////color: ItemColor::random(),
////clips,
////})
////}
//}