legato 0.0.9

Legato is a WIP audiograph and DSL for quickly developing audio applications
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155

#![feature(portable_simd)]

use std::{fmt::Debug, path::Path};

use heapless::spsc::{Consumer, Producer};

use crate::{
    builder::ValidationError,
    config::Config,
    executor::OutputView,
    midi::MidiRuntimeFrontend,
    msg::LegatoMsg,
    node::Inputs,
    params::{ParamError, ParamKey, ParamStoreFrontend},
    runtime::{Runtime, RuntimeFrontend},
};

pub mod builder;
pub mod config;
pub mod connection;
pub mod context;
pub mod dsl;
pub mod executor;
pub mod graph;
pub mod harness;
pub mod math;
pub mod midi;
pub mod msg;
pub mod node;
pub mod out;
pub mod params;
pub mod pipes;
pub mod ports;
pub mod registry;
pub mod resources;
pub mod ring;
pub mod runtime;
pub mod sample;
pub mod simd;
pub mod spec;

pub mod nodes;

#[derive(Debug, PartialEq, Clone)]
pub enum LegatoError {
    ValidationError(ValidationError),
    ParamError(ParamError),
}

pub struct LegatoApp {
    runtime: Runtime,
    midi_runtime_frontend: Option<MidiRuntimeFrontend>,
    consumer: Consumer<'static, LegatoMsg>,
}

impl LegatoApp {
    pub fn new(runtime: Runtime, receiver: Consumer<'static, LegatoMsg>) -> Self {
        Self {
            runtime,
            midi_runtime_frontend: None,
            consumer: receiver,
        }
    }
    /// Pull the next block from the runtime, if you choose to manage the
    /// runtime yourself.
    ///
    /// This is useful for tests, or compatability with different audio backends.
    ///
    /// This gives the data in a [[L,L,L], [R,R,R], etc] layout
    pub fn next_block(&mut self, external_inputs: Option<&Inputs>) -> OutputView<'_> {
        // If we have a midi runtime, drain it.
        if let Some(midi_runtime) = &self.midi_runtime_frontend {
            let ctx = self.runtime.get_context_mut();
            // Clear our old messages
            ctx.clear_midi();
            while let Some(msg) = midi_runtime.recv() {
                // TOOD: Realtime logging with channel maybe?
                if let Err(e) = ctx.insert_midi_msg(msg) {
                    eprintln!("{:?}", e);
                }
            }
        }
        // Handle messages from the LegatoFrontend
        while let Some(msg) = self.consumer.dequeue() {
            self.runtime.handle_msg(msg);
        }
        self.runtime.next_block(external_inputs)
    }

    pub fn set_midi_runtime(&mut self, rt: MidiRuntimeFrontend) {
        self.midi_runtime_frontend = Some(rt);
    }

    pub fn get_config(&self) -> Config {
        self.runtime.get_config()
    }
}

impl Debug for LegatoApp {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("LegatoApp")
            .field("runtime", &self.runtime)
            .finish()
    }
}

pub struct LegatoFrontend {
    runtime_frontend: RuntimeFrontend,
    param_store_frontend: ParamStoreFrontend,
    producer: Producer<'static, LegatoMsg>,
}

impl LegatoFrontend {
    pub fn new(
        runtime_frontend: RuntimeFrontend,
        param_store_frontend: ParamStoreFrontend,
        producer: Producer<'static, LegatoMsg>,
    ) -> Self {
        Self {
            runtime_frontend,
            param_store_frontend,
            producer,
        }
    }

    pub fn load_sample(
        &mut self,
        sampler: &String,
        path: &Path,
        chans: usize,
        sr: u32,
    ) -> Result<(), sample::AudioSampleError> {
        self.runtime_frontend.load_sample(
            sampler,
            path.to_str().expect("Path not found!"),
            chans,
            sr,
        )
    }

    pub fn set_param(&mut self, name: &'static str, val: f32) -> Result<(), ParamError> {
        if let Ok(key) = self.param_store_frontend.get_key(name) {
            return self.param_store_frontend.set_param(key, val);
        }
        Err(ParamError::ParamNotFound)
    }

    pub fn get_param_key(&self, param_name: &'static str) -> Result<ParamKey, ParamError> {
        self.param_store_frontend.get_key(param_name)
    }

    pub fn send_msg(&mut self, msg: LegatoMsg) {
        let _ = self.producer.enqueue(msg);
    }
}