sva_engine/
lib.rs

1// Concern: resolves a graph into instances a caller can ask about, and keeps their buffers | Non-concern: parsing (sva-ast), CLI framing (sva-cli) | IO: (&Graph, root) -> Instances, Traced
2
3mod arguments;
4mod bindings;
5mod cache;
6mod cast;
7mod error;
8mod index;
9pub mod instantiate;
10mod loops;
11mod lower;
12mod meaning;
13pub mod overload;
14pub mod query;
15mod recent;
16mod refs;
17pub mod render;
18mod schedule;
19mod steps;
20mod threads;
21mod time;
22mod trace;
23mod typing;
24mod vocabulary;
25
26pub use arguments::{Argument, Arguments, Called, Chosen};
27pub use bindings::Binding;
28pub use cache::log::cache_log;
29pub use cache::{
30    Backend, CacheStats, Counters, DEFAULT_CACHE_BYTES, DEFAULT_MARK_EVERY, DEFAULT_STORE_BYTES,
31    FETCH_READS, Hash, INDEX_NAME, Lookup, Nothing, Outcome, PayloadKind, Persisted, STORE_FORMAT,
32    Store, Stored, Tier,
33};
34pub use cast::Cast;
35pub use error::{BindingFault, Diagnostic, EngineError, Located, REGISTRY};
36pub use meaning::{Meaning, meaning};
37pub use query::{
38    Answer, Arg, Ask, Atom, DEFAULT_BUFFER_SECS, DEFAULT_CELL_SECS, DEFAULT_FLOOR_DB,
39    DEFAULT_FRAME_SECS, DEFAULT_LEDGER_DEPTH, DEFAULT_MAX_PAIRS, DEFAULT_MAX_PEAKS,
40    DEFAULT_MODULATION_WINDOW_SECS, DEFAULT_NOVELTY_WINDOW_SECS, DEFAULT_OVERSAMPLE,
41    DEFAULT_PERIODICITY_WINDOW_SECS, DEFAULT_SMOOTH_SECS, Given, Harmonic, Output, READINGS,
42    Reading, Reads, Representation,
43};
44pub use refs::{identity, nodes_in, spectral_sum_of};
45pub use render::until::{Cmp, Term};
46pub use render::{
47    Abandon, Built, Change, Changed, Counts, Handle, Hear, LATEST, NOTES, Never, Out, Placed,
48    Range, Render, RenderConfig, STREAMED, Session, Stream, StreamConfig, Until, Work, answer,
49    answer_buffer, change, ends, fetch, plan, render, render_in, render_over, sketch_atom,
50};
51pub use schedule::{Order, Schedule, schedule_from};
52pub use sva_formula::{C64, Codomain, Held, Line, NodeId, SpectralSum, Ty, Var};
53pub use sva_samples::measure::{harmony, modulation, periodicity, pitch, self_similarity, sliding};
54pub use sva_samples::{
55    Alias, AliasBand, BAND_COUNT, BandCrest, BandTrack, Bands, Buffer, Crest,
56    CuttingBelowSilenceThreshold, Detail, EnvelopeFrame, Extent, FormantFrame, Frames, Label,
57    LedgerEntry, Loudness, LoudnessFrame, MAX_PINNED_FRAME, Onsets, PSYCHOACOUSTIC_V1, PitchFrame,
58    Profile, Rule, SignalKind, Source, Spectrum, StereoFrame, StereoImage, measure_alias,
59    pinned_frame,
60};
61pub use threads::default_threads;
62pub use trace::{Traced, Up, trace};
63pub use typing::{Typing, Value, When};
64pub use vocabulary::{MAX_WIDTH, named_may_move, recognized_named, shape, shape_name};
65
66use sva_ast::Graph;
67
68pub const DEFAULT_SAMPLE_RATE: u32 = 44_100;
69
70/// One inference, so a lint and a render refuse identically.
71pub fn check_structure(graph: &Graph, root: &str) -> Result<(), EngineError> {
72    types(graph, root).map(|_| ())
73}
74
75/// One `Ty` per node, across refs, over the instances `root` reaches.
76pub fn types(graph: &Graph, root: &str) -> Result<Typing, EngineError> {
77    types_at(graph, root, DEFAULT_SAMPLE_RATE)
78}
79
80/// At `rate`, whose step each `sp` is.
81pub fn types_at(graph: &Graph, root: &str, rate: u32) -> Result<Typing, EngineError> {
82    let instances = instantiate::instantiate(graph, root, rate)?;
83    // A root names the instance its own defaults resolved to, as `render` asks for.
84    let held = instances.instance_of(root)?;
85    let order = schedule::schedule_from(&instances, std::slice::from_ref(&held))?;
86    typing::infer_all(&instances, &order)
87}
sva_engine/lib.rs

sva_engine/
lib.rs
