sva_engine/
query.rs

1// Concern: the one table of observations: names, arguments, defaults, what each reads, help; the answer envelope | Non-concern: taking one reading (answer.rs) | IO: (name, Given) -> Representation
2
3use sva_formula::{C64, Line, SpectralSum, Var};
4use sva_samples::measure::harmony::dissonance::Dissonance;
5use sva_samples::measure::harmony::inharmonicity::Inharmonicity;
6use sva_samples::measure::harmony::tonnetz::TonalDistance;
7use sva_samples::measure::harmony::voice_leading::{Norm, VoiceLeading};
8use sva_samples::measure::modulation::Modulation;
9use sva_samples::measure::periodicity::Periodicity;
10use sva_samples::measure::self_similarity::SelfSimilarity;
11use sva_samples::{
12    Alias, Bands, Buffer, Consumes, Crest, EnvelopeFrame, FormantFrame, LedgerEntry, Loudness,
13    Onsets, PitchFrame, Source, Spectrum, StereoImage,
14};
15
16use crate::arguments::Arguments;
17use crate::bindings::Binding;
18
19/// The default window a framed reading uses when the observation names none.
20pub const DEFAULT_FRAME_SECS: f64 = 0.05;
21pub const DEFAULT_MAX_PEAKS: usize = 16;
22pub const DEFAULT_LEDGER_DEPTH: usize = 3;
23pub const DEFAULT_OVERSAMPLE: u32 = 4;
24/// How much audio a live device holds ahead of what it plays, where `samples` names one.
25pub const DEFAULT_BUFFER_SECS: f64 = 0.05;
26/// The amplitude, in dB against full scale, under which a harmonic reading drops a partial.
27pub const DEFAULT_FLOOR_DB: f64 = -40.0;
28/// The most partial pairs one `dissonance` frame sums before it refuses.
29pub const DEFAULT_MAX_PAIRS: usize = 1 << 17;
30/// The span of onset-strength envelope one `periodicity` window autocorrelates.
31pub const DEFAULT_PERIODICITY_WINDOW_SECS: f64 = 6.0;
32/// The span of band envelope one `modulation` window transforms.
33pub const DEFAULT_MODULATION_WINDOW_SECS: f64 = 4.0;
34/// The side of one `self_similarity` matrix cell.
35pub const DEFAULT_CELL_SECS: f64 = 0.5;
36/// The length `self_similarity` averages each diagonal over before it picks stripes.
37pub const DEFAULT_SMOOTH_SECS: f64 = 4.0;
38/// The whole width of `self_similarity`'s novelty kernel.
39pub const DEFAULT_NOVELTY_WINDOW_SECS: f64 = 8.0;
40
41/// Every named argument a reading may take; the engine reads only those `Given` holds.
42#[derive(Clone, Copy, Debug, PartialEq, Eq)]
43pub enum Arg {
44    Peaks,
45    Frame,
46    Depth,
47    Oversample,
48    Brief,
49    Skim,
50    Node,
51    Buffer,
52    Floor,
53    Norm,
54    Pairs,
55    Window,
56    Curve,
57    Bpm,
58    Cell,
59    Smooth,
60}
61
62impl Arg {
63    pub fn key(self) -> &'static str {
64        match self {
65            Arg::Peaks => "peaks",
66            Arg::Frame => "frame",
67            Arg::Depth => "depth",
68            Arg::Oversample => "oversample",
69            Arg::Brief => "brief",
70            Arg::Skim => "skim",
71            Arg::Node => "node",
72            Arg::Buffer => "buffer",
73            Arg::Floor => "floor",
74            Arg::Norm => "norm",
75            Arg::Pairs => "pairs",
76            Arg::Window => "window",
77            Arg::Curve => "curve",
78            Arg::Bpm => "bpm",
79            Arg::Cell => "cell",
80            Arg::Smooth => "smooth",
81        }
82    }
83}
84
85/// The arguments a `Representation` is built from, each at its default until written.
86#[derive(Clone, Copy, Debug, PartialEq)]
87pub struct Given {
88    pub peaks: usize,
89    /// `None` until written: `spectrum` then sizes its transform to the range, and every
90    /// other framed reading steps by `DEFAULT_FRAME_SECS`.
91    pub frame: Option<f64>,
92    pub depth: usize,
93    pub oversample: u32,
94    pub floor_db: f64,
95    pub norm: Norm,
96    pub max_pairs: usize,
97    /// `None` until written: each windowed reading then takes its own default.
98    pub window: Option<f64>,
99    pub curve: bool,
100    pub bpm: Option<f64>,
101    pub cell_secs: f64,
102    pub smooth_secs: f64,
103}
104
105impl Default for Given {
106    fn default() -> Given {
107        Given {
108            peaks: DEFAULT_MAX_PEAKS,
109            frame: None,
110            depth: DEFAULT_LEDGER_DEPTH,
111            oversample: DEFAULT_OVERSAMPLE,
112            floor_db: DEFAULT_FLOOR_DB,
113            norm: Norm::L1,
114            max_pairs: DEFAULT_MAX_PAIRS,
115            window: None,
116            curve: false,
117            bpm: None,
118            cell_secs: DEFAULT_CELL_SECS,
119            smooth_secs: DEFAULT_SMOOTH_SECS,
120        }
121    }
122}
123
124/// What a reading reads, which decides whether its answer is exact or measured.
125#[derive(Clone, Copy, Debug, PartialEq, Eq)]
126pub enum Reads {
127    /// The written closed form alone: always exact.
128    ClosedForm,
129    /// Whichever the node holds: exact off a closed form, measured off samples.
130    Either,
131    /// Samples alone: always measured.
132    Samples,
133    /// Samples and the graph that rendered them, so no file answers it.
134    Graph,
135    /// The resolved instances, before anything renders; nothing composes for it.
136    Structure,
137}
138
139impl Reads {
140    pub fn consumes(self, closed: bool) -> Consumes {
141        match self {
142            Reads::ClosedForm | Reads::Structure => Consumes::ClosedForm,
143            Reads::Either if closed => Consumes::ClosedForm,
144            Reads::Either | Reads::Samples | Reads::Graph => Consumes::Buffer,
145        }
146    }
147
148    pub fn off_samples(self, sampled: bool) -> bool {
149        match self {
150            Reads::Samples => true,
151            Reads::Either => sampled,
152            Reads::ClosedForm | Reads::Graph | Reads::Structure => false,
153        }
154    }
155}
156
157pub struct Reading {
158    pub name: &'static str,
159    pub takes: &'static [Arg],
160    pub reads: Reads,
161    pub help: &'static str,
162    build: fn(&Given) -> Representation,
163}
164
165impl Reading {
166    pub fn representation(&self, given: &Given) -> Representation {
167        (self.build)(given)
168    }
169}
170
171static LINES: Reading = Reading {
172    name: "lines",
173    takes: &[],
174    reads: Reads::ClosedForm,
175    help: "the exact line list of a closed form, every channel's in channel order with no \
176           channel named; `atoms` names each term's",
177    build: |_| Representation::Lines,
178};
179
180static ATOMS: Reading = Reading {
181    name: "atoms",
182    takes: &[],
183    reads: Reads::ClosedForm,
184    help: "each term of a closed form: its channel, sketch, line, decay, polynomial and window",
185    build: |_| Representation::Atoms,
186};
187
188static SPECTRUM: Reading = Reading {
189    name: "spectrum",
190    takes: &[Arg::Peaks, Arg::Frame],
191    reads: Reads::Either,
192    help: "its lines, or its spectrum averaged over every frame and, power per bin, every \
193           channel; off samples a Hann spans the samples a frame holds, zero past them, each \
194           third-octave band reads as the amplitude of the one sine carrying its power, and, \
195           loudest first, a local maximum is no peak where its bin holds no more than the \
196           peaks kept, and a DC bin 0 holds as its maximum, can leak there, each bounded by \
197           Harris's (1978) Hann sidelobe bound 1/(pi m (m^2 - 1)) at m bins, its sinusoid taken \
198           anywhere within half a bin of its own: a bound where the frame is stationary \
199           sinusoids at the kept peaks",
200    build: |g| Representation::Spectrum {
201        max_peaks: g.peaks,
202        frame_secs: g.frame,
203    },
204};
205
206static ENVELOPE: Reading = Reading {
207    name: "envelope",
208    takes: &[Arg::Frame],
209    reads: Reads::Either,
210    help: "off a closed form the squared modulus of its analytic signal, x^2 + H{x}^2, as \
211           atoms per channel; off samples rms and peak per frame: the rms of every channel's \
212           samples together, the peak of any channel",
213    build: |g| Representation::Envelope {
214        frame_secs: g.frame,
215    },
216};
217
218static DERIVATIVE: Reading = Reading {
219    name: "derivative",
220    takes: &[],
221    reads: Reads::Either,
222    help: "the derivative's atoms per channel, each series listed as `atoms` lists it; off \
223           samples the first difference, (x[n] - x[n-1]) * rate at every sample but the first",
224    build: |_| Representation::Derivative,
225};
226
227static SAMPLES: Reading = Reading {
228    name: "samples",
229    takes: &[Arg::Buffer],
230    reads: Reads::Samples,
231    help: "the samples themselves; a `.wav` destination writes them as audio, an \
232           `alsa:<device>` one plays them as they render",
233    build: |_| Representation::Samples,
234};
235
236static LEDGER: Reading = Reading {
237    name: "ledger",
238    takes: &[Arg::Depth, Arg::Brief, Arg::Skim],
239    reads: Reads::Graph,
240    help: "rms, peak, share and clipping per node under the target",
241    build: |g| Representation::Ledger { depth: g.depth },
242};
243
244static PITCH: Reading = Reading {
245    name: "pitch",
246    takes: &[Arg::Peaks, Arg::Frame],
247    reads: Reads::Either,
248    help: "the notes it holds, per frame off samples, every channel's power per bin averaged; \
249           off samples its peaks are picked as `spectrum` picks them, and a series' \
250           fundamental is read within half the frame's resolution of its root's peak",
251    build: |g| Representation::Pitch {
252        max_notes: g.peaks,
253        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
254    },
255};
256
257static FORMANTS: Reading = Reading {
258    name: "formants",
259    takes: &[Arg::Peaks, Arg::Frame],
260    reads: Reads::Samples,
261    help: "formant frequencies, bandwidths and levels per frame, off every channel's \
262           autocorrelation averaged",
263    build: |g| Representation::Formants {
264        max_formants: g.peaks,
265        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
266    },
267};
268
269static STEREO: Reading = Reading {
270    name: "stereo",
271    takes: &[Arg::Frame],
272    reads: Reads::Samples,
273    help: "correlation, width and balance between two channels, per frame",
274    build: |g| Representation::Stereo {
275        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
276    },
277};
278
279static BANDS: Reading = Reading {
280    name: "bands",
281    takes: &[],
282    reads: Reads::Samples,
283    help: "each auditory band's level over time, every channel's band energy averaged",
284    build: |_| Representation::Bands,
285};
286
287static CREST: Reading = Reading {
288    name: "crest",
289    takes: &[],
290    reads: Reads::Samples,
291    help: "peak against rms, broadband and per band: any channel's peak against the rms of \
292           every channel's samples together",
293    build: |_| Representation::Crest,
294};
295
296static LOUDNESS: Reading = Reading {
297    name: "loudness",
298    takes: &[],
299    reads: Reads::Samples,
300    help: "integrated, momentary and short-term loudness in LUFS",
301    build: |_| Representation::Loudness,
302};
303
304static ONSETS: Reading = Reading {
305    name: "onsets",
306    takes: &[],
307    reads: Reads::Samples,
308    help: "onset times, their strength and the spacing between them, each channel's spectral \
309           flux summed",
310    build: |_| Representation::Onsets,
311};
312
313static ALIAS: Reading = Reading {
314    name: "alias",
315    takes: &[Arg::Oversample],
316    reads: Reads::Graph,
317    help: "what folded, against a re-render at a multiple of the rate",
318    build: |g| Representation::Alias {
319        oversample: g.oversample,
320    },
321};
322
323static DISSONANCE: Reading = Reading {
324    name: "dissonance",
325    takes: &[Arg::Frame, Arg::Floor, Arg::Pairs],
326    reads: Reads::Either,
327    help: "Sethares' sensory roughness per frame of its partials over a floor, with its mean, \
328           max and min; measured partials off every channel's power per bin averaged",
329    build: |g| Representation::Harmony {
330        reading: Harmonic::Dissonance {
331            max_pairs: g.max_pairs,
332        },
333        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
334        floor_db: g.floor_db,
335    },
336};
337
338static VOICE_LEADING: Reading = Reading {
339    name: "voice_leading",
340    takes: &[Arg::Frame, Arg::Floor, Arg::Norm],
341    reads: Reads::Either,
342    help: "its chords over time, and the smallest voice leading between each two, l1 or l2 \
343           in semitones; measured partials off every channel's power per bin averaged",
344    build: |g| Representation::Harmony {
345        reading: Harmonic::VoiceLeading { norm: g.norm },
346        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
347        floor_db: g.floor_db,
348    },
349};
350
351static TONAL_DISTANCE: Reading = Reading {
352    name: "tonal_distance",
353    takes: &[Arg::Frame, Arg::Floor],
354    reads: Reads::Either,
355    help: "its chords over time, the Tonnetz steps between each two triads and each one's \
356           from the first; measured partials off every channel's power per bin averaged",
357    build: |g| Representation::Harmony {
358        reading: Harmonic::TonalDistance,
359        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
360        floor_db: g.floor_db,
361    },
362};
363
364static INHARMONICITY: Reading = Reading {
365    name: "inharmonicity",
366    takes: &[Arg::Frame, Arg::Floor],
367    reads: Reads::Either,
368    help: "its harmonic series per frame: each member's cents off n f1, the stiff-string B each \
369           fits, and the energy in no series; measured partials off every channel's power per \
370           bin averaged",
371    build: |g| Representation::Harmony {
372        reading: Harmonic::Inharmonicity,
373        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
374        floor_db: g.floor_db,
375    },
376};
377
378static PERIODICITY: Reading = Reading {
379    name: "periodicity",
380    takes: &[Arg::Frame, Arg::Window, Arg::Curve],
381    reads: Reads::Samples,
382    help: "how strongly its onset strength repeats per sliding window, broadband, under 150 Hz \
383           and over: the leading periods in seconds and bpm with their bounds, their \
384           autocorrelation heights, the drift between windows; every channel's band energy \
385           averaged",
386    build: |g| Representation::Periodicity {
387        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
388        window_secs: g.window.unwrap_or(DEFAULT_PERIODICITY_WINDOW_SECS),
389        curve: g.curve,
390    },
391};
392
393static MODULATION: Reading = Reading {
394    name: "modulation",
395    takes: &[Arg::Frame, Arg::Window, Arg::Bpm],
396    reads: Reads::Samples,
397    help: "how its band envelopes move per sliding window, under 150 Hz, to 2 kHz and over: \
398           the leading modulation rates from 0.5 to 20 Hz, in beats where `bpm` is given, \
399           their depth as a modulation index, each with its bounds, the level, and the \
400           spectral centroid's mean and its own swing in Hz; every channel's band energy \
401           averaged",
402    build: |g| Representation::Modulation {
403        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
404        window_secs: g.window.unwrap_or(DEFAULT_MODULATION_WINDOW_SECS),
405        bpm: g.bpm,
406    },
407};
408
409static SELF_SIMILARITY: Reading = Reading {
410    name: "self_similarity",
411    takes: &[
412        Arg::Frame,
413        Arg::Cell,
414        Arg::Smooth,
415        Arg::Window,
416        Arg::Floor,
417        Arg::Peaks,
418        Arg::Curve,
419    ],
420    reads: Reads::Samples,
421    help: "how its stretches resemble one another, by chroma and by band levels, over cells \
422           of `cell`: the repeated stretches as stripes, each pair of spans with its \
423           similarity and, by chroma, its transposition in semitones; Foote's novelty at every \
424           cell boundary and its peaks; `curve=1` adds the cells and the matrix; every \
425           channel's power per bin and band energy averaged",
426    build: |g| Representation::SelfSimilarity {
427        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
428        cell_secs: g.cell_secs,
429        smooth_secs: g.smooth_secs,
430        window_secs: g.window.unwrap_or(DEFAULT_NOVELTY_WINDOW_SECS),
431        floor_db: g.floor_db,
432        listed: g.peaks,
433        curve: g.curve,
434    },
435};
436
437static BINDINGS: Reading = Reading {
438    name: "bindings",
439    takes: &[Arg::Node],
440    reads: Reads::Structure,
441    help: "the bindings one instance resolved, each with its source",
442    build: |_| Representation::Bindings,
443};
444
445static ARGUMENTS: Reading = Reading {
446    name: "arguments",
447    takes: &[],
448    reads: Reads::Structure,
449    help: "each builtin call's named arguments as the numbers it was lowered with",
450    build: |_| Representation::Arguments,
451};
452
453/// Every reading a caller may ask for, in the order a listing prints them.
454pub static READINGS: [&Reading; 24] = [
455    &LINES,
456    &ATOMS,
457    &SPECTRUM,
458    &ENVELOPE,
459    &DERIVATIVE,
460    &SAMPLES,
461    &LEDGER,
462    &PITCH,
463    &FORMANTS,
464    &STEREO,
465    &BANDS,
466    &CREST,
467    &LOUDNESS,
468    &ONSETS,
469    &ALIAS,
470    &DISSONANCE,
471    &VOICE_LEADING,
472    &TONAL_DISTANCE,
473    &INHARMONICITY,
474    &PERIODICITY,
475    &MODULATION,
476    &SELF_SIMILARITY,
477    &BINDINGS,
478    &ARGUMENTS,
479];
480
481#[derive(Clone, Copy, Debug, PartialEq)]
482pub enum Representation {
483    Lines,
484    Atoms,
485    Spectrum {
486        max_peaks: usize,
487        frame_secs: Option<f64>,
488    },
489    Envelope {
490        frame_secs: Option<f64>,
491    },
492    Derivative,
493    Samples,
494    Ledger {
495        depth: usize,
496    },
497    Pitch {
498        max_notes: usize,
499        frame_secs: f64,
500    },
501    Formants {
502        max_formants: usize,
503        frame_secs: f64,
504    },
505    Stereo {
506        frame_secs: f64,
507    },
508    Bands,
509    Crest,
510    Loudness,
511    Onsets,
512    Alias {
513        oversample: u32,
514    },
515    /// The partials it is read from step by `frame_secs` and stop at `floor_db`.
516    Harmony {
517        reading: Harmonic,
518        frame_secs: f64,
519        floor_db: f64,
520    },
521    /// Windows of `window_secs` centred every `frame_secs`; `curve` adds each one's heights.
522    Periodicity {
523        frame_secs: f64,
524        window_secs: f64,
525        curve: bool,
526    },
527    /// Windows of `window_secs` centred every `frame_secs`; `bpm` adds each rate in beats.
528    Modulation {
529        frame_secs: f64,
530        window_secs: f64,
531        bpm: Option<f64>,
532    },
533    /// Cells of `cell_secs` over frames every `frame_secs`; `listed` stripes and peaks are
534    /// listed, and `curve` adds the cells and matrices.
535    SelfSimilarity {
536        frame_secs: f64,
537        cell_secs: f64,
538        smooth_secs: f64,
539        window_secs: f64,
540        floor_db: f64,
541        listed: usize,
542        curve: bool,
543    },
544    Bindings,
545    Arguments,
546}
547
548/// The readings taken off one curve of partials.
549#[derive(Clone, Copy, Debug, PartialEq, Eq)]
550pub enum Harmonic {
551    Dissonance { max_pairs: usize },
552    VoiceLeading { norm: Norm },
553    TonalDistance,
554    Inharmonicity,
555}
556
557/// What a caller asked of one node.
558#[derive(Clone, Debug, PartialEq)]
559pub struct Ask {
560    pub node: String,
561    pub representation: Representation,
562}
563
564#[derive(Clone, Debug, PartialEq)]
565pub enum Output {
566    Lines(Vec<Line>),
567    Atoms(Vec<Atom>),
568    Symbolic(Box<SpectralSum>),
569    Samples(Box<Buffer>),
570    Spectrum(Box<Spectrum>),
571    Envelope(Vec<EnvelopeFrame>),
572    Pitch(Vec<PitchFrame>),
573    Formants(Vec<FormantFrame>),
574    Stereo(Box<StereoImage>),
575    Bands(Box<Bands>),
576    Crest(Box<Crest>),
577    Loudness(Box<Loudness>),
578    Onsets(Box<Onsets>),
579    Alias(Box<Alias>),
580    Ledger(Vec<LedgerEntry>),
581    Dissonance(Box<Dissonance>),
582    VoiceLeading(Box<VoiceLeading>),
583    TonalDistance(Box<TonalDistance>),
584    Inharmonicity(Box<Inharmonicity>),
585    Periodicity(Box<Periodicity>),
586    Modulation(Box<Modulation>),
587    SelfSimilarity(Box<SelfSimilarity>),
588    Bindings(Vec<Binding>),
589    Arguments(Vec<Arguments>),
590}
591
592/// `amp (x-polynomial_at)^degree e^(-decay (x-decay_from)) e^(2pi i turns x)` on `[start, end)`
593#[derive(Clone, Debug, PartialEq)]
594pub struct Atom {
595    pub var: Var,
596    /// The lane, or channel, it stands in.
597    pub channel: usize,
598    pub sketch: String,
599    pub amp: C64,
600    pub turns: f64,
601    pub decay: f64,
602    pub decay_from: f64,
603    pub degree: u16,
604    pub polynomial_at: f64,
605    pub start: Option<f64>,
606    pub end: Option<f64>,
607}
608
609/// Every answer says which reading ran and under which profile, so a caller never has to
610/// infer either from the shape of the value.
611#[derive(Clone, Debug, PartialEq)]
612pub struct Answer {
613    pub value: Output,
614    pub source: Source,
615    pub profile: &'static str,
616    pub rate: Option<u32>,
617    /// A series answers the terms it keeps, the tail beside them.
618    pub dropped: Vec<sva_formula::Line>,
619    pub tail_db: Option<f64>,
620}
621
622impl Answer {
623    pub fn whole(
624        value: Output,
625        source: Source,
626        profile: &'static str,
627        rate: Option<u32>,
628    ) -> Answer {
629        Answer {
630            value,
631            source,
632            profile,
633            rate,
634            dropped: Vec::new(),
635            tail_db: None,
636        }
637    }
638}
639
640impl Representation {
641    /// Exhaustive, so a variant with no row is a compile error.
642    pub fn reading(self) -> &'static Reading {
643        match self {
644            Representation::Lines => &LINES,
645            Representation::Atoms => &ATOMS,
646            Representation::Spectrum { .. } => &SPECTRUM,
647            Representation::Envelope { .. } => &ENVELOPE,
648            Representation::Derivative => &DERIVATIVE,
649            Representation::Samples => &SAMPLES,
650            Representation::Ledger { .. } => &LEDGER,
651            Representation::Pitch { .. } => &PITCH,
652            Representation::Formants { .. } => &FORMANTS,
653            Representation::Stereo { .. } => &STEREO,
654            Representation::Bands => &BANDS,
655            Representation::Crest => &CREST,
656            Representation::Loudness => &LOUDNESS,
657            Representation::Onsets => &ONSETS,
658            Representation::Alias { .. } => &ALIAS,
659            Representation::Harmony { reading, .. } => match reading {
660                Harmonic::Dissonance { .. } => &DISSONANCE,
661                Harmonic::VoiceLeading { .. } => &VOICE_LEADING,
662                Harmonic::TonalDistance => &TONAL_DISTANCE,
663                Harmonic::Inharmonicity => &INHARMONICITY,
664            },
665            Representation::Periodicity { .. } => &PERIODICITY,
666            Representation::Modulation { .. } => &MODULATION,
667            Representation::SelfSimilarity { .. } => &SELF_SIMILARITY,
668            Representation::Bindings => &BINDINGS,
669            Representation::Arguments => &ARGUMENTS,
670        }
671    }
672
673    pub fn name(self) -> &'static str {
674        self.reading().name
675    }
676
677    pub fn consumes(self, closed: bool) -> Consumes {
678        self.reading().reads.consumes(closed)
679    }
680
681    /// Whether a node's samples alone answer this reading, `sampled` where it holds samples.
682    pub fn off_samples(self, sampled: bool) -> bool {
683        self.reading().reads.off_samples(sampled)
684    }
685
686    pub fn from_name(name: &str) -> Option<Representation> {
687        READINGS
688            .iter()
689            .find(|row| row.name == name)
690            .map(|row| row.representation(&Given::default()))
691    }
692}
sva_engine/query.rs

sva_engine/
query.rs
