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",
176    build: |_| Representation::Lines,
177};
178
179static ATOMS: Reading = Reading {
180    name: "atoms",
181    takes: &[],
182    reads: Reads::ClosedForm,
183    help: "each term of a closed form: its sketch, line, decay, polynomial and window",
184    build: |_| Representation::Atoms,
185};
186
187static SPECTRUM: Reading = Reading {
188    name: "spectrum",
189    takes: &[Arg::Peaks, Arg::Frame],
190    reads: Reads::Either,
191    help: "its lines, or its spectrum averaged over every frame and, power per bin, every \
192           channel; off samples a Hann spans the samples a frame holds, zero past them, and, \
193           loudest first, a local maximum is no peak where its bin holds no more than the \
194           peaks kept can leak there, each bounded by Harris's (1978) Hann sidelobe bound \
195           1/(pi m (m^2 - 1)) at m bins, its sinusoid taken anywhere within half a bin of its \
196           own: a bound where the frame is stationary sinusoids at the kept peaks",
197    build: |g| Representation::Spectrum {
198        max_peaks: g.peaks,
199        frame_secs: g.frame,
200    },
201};
202
203static ENVELOPE: Reading = Reading {
204    name: "envelope",
205    takes: &[Arg::Frame],
206    reads: Reads::Either,
207    help: "rms and peak, per frame off samples: the rms of every channel's samples together, \
208           the peak of any channel",
209    build: |g| Representation::Envelope {
210        frame_secs: g.frame,
211    },
212};
213
214static DERIVATIVE: Reading = Reading {
215    name: "derivative",
216    takes: &[],
217    reads: Reads::Either,
218    help: "the derivative, or the first difference of samples",
219    build: |_| Representation::Derivative,
220};
221
222static SAMPLES: Reading = Reading {
223    name: "samples",
224    takes: &[Arg::Buffer],
225    reads: Reads::Samples,
226    help: "the samples themselves; a `.wav` destination writes them as audio, an \
227           `alsa:<device>` one plays them as they render",
228    build: |_| Representation::Samples,
229};
230
231static LEDGER: Reading = Reading {
232    name: "ledger",
233    takes: &[Arg::Depth, Arg::Brief, Arg::Skim],
234    reads: Reads::Graph,
235    help: "rms, peak, share and clipping per node under the target",
236    build: |g| Representation::Ledger { depth: g.depth },
237};
238
239static PITCH: Reading = Reading {
240    name: "pitch",
241    takes: &[Arg::Peaks, Arg::Frame],
242    reads: Reads::Either,
243    help: "the notes it holds, per frame off samples, every channel's power per bin averaged; \
244           off samples its peaks are picked as `spectrum` picks them, and a series' \
245           fundamental is read within half the frame's resolution of its root's peak",
246    build: |g| Representation::Pitch {
247        max_notes: g.peaks,
248        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
249    },
250};
251
252static FORMANTS: Reading = Reading {
253    name: "formants",
254    takes: &[Arg::Peaks, Arg::Frame],
255    reads: Reads::Samples,
256    help: "formant frequencies, bandwidths and levels per frame, off every channel's \
257           autocorrelation averaged",
258    build: |g| Representation::Formants {
259        max_formants: g.peaks,
260        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
261    },
262};
263
264static STEREO: Reading = Reading {
265    name: "stereo",
266    takes: &[Arg::Frame],
267    reads: Reads::Samples,
268    help: "correlation, width and balance between two channels, per frame",
269    build: |g| Representation::Stereo {
270        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
271    },
272};
273
274static BANDS: Reading = Reading {
275    name: "bands",
276    takes: &[],
277    reads: Reads::Samples,
278    help: "each auditory band's level over time, every channel's band energy averaged",
279    build: |_| Representation::Bands,
280};
281
282static CREST: Reading = Reading {
283    name: "crest",
284    takes: &[],
285    reads: Reads::Samples,
286    help: "peak against rms, broadband and per band: any channel's peak against the rms of \
287           every channel's samples together",
288    build: |_| Representation::Crest,
289};
290
291static LOUDNESS: Reading = Reading {
292    name: "loudness",
293    takes: &[],
294    reads: Reads::Samples,
295    help: "integrated, momentary and short-term loudness in LUFS",
296    build: |_| Representation::Loudness,
297};
298
299static ONSETS: Reading = Reading {
300    name: "onsets",
301    takes: &[],
302    reads: Reads::Samples,
303    help: "onset times, their strength and the spacing between them, each channel's spectral \
304           flux summed",
305    build: |_| Representation::Onsets,
306};
307
308static ALIAS: Reading = Reading {
309    name: "alias",
310    takes: &[Arg::Oversample],
311    reads: Reads::Graph,
312    help: "what folded, against a re-render at a multiple of the rate",
313    build: |g| Representation::Alias {
314        oversample: g.oversample,
315    },
316};
317
318static DISSONANCE: Reading = Reading {
319    name: "dissonance",
320    takes: &[Arg::Frame, Arg::Floor, Arg::Pairs],
321    reads: Reads::Either,
322    help: "Sethares' sensory roughness per frame of its partials over a floor, with its mean, \
323           max and min; measured partials off every channel's power per bin averaged",
324    build: |g| Representation::Harmony {
325        reading: Harmonic::Dissonance {
326            max_pairs: g.max_pairs,
327        },
328        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
329        floor_db: g.floor_db,
330    },
331};
332
333static VOICE_LEADING: Reading = Reading {
334    name: "voice_leading",
335    takes: &[Arg::Frame, Arg::Floor, Arg::Norm],
336    reads: Reads::Either,
337    help: "its chords over time, and the smallest voice leading between each two, l1 or l2 \
338           in semitones; measured partials off every channel's power per bin averaged",
339    build: |g| Representation::Harmony {
340        reading: Harmonic::VoiceLeading { norm: g.norm },
341        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
342        floor_db: g.floor_db,
343    },
344};
345
346static TONAL_DISTANCE: Reading = Reading {
347    name: "tonal_distance",
348    takes: &[Arg::Frame, Arg::Floor],
349    reads: Reads::Either,
350    help: "its chords over time, the Tonnetz steps between each two triads and each one's \
351           from the first; measured partials off every channel's power per bin averaged",
352    build: |g| Representation::Harmony {
353        reading: Harmonic::TonalDistance,
354        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
355        floor_db: g.floor_db,
356    },
357};
358
359static INHARMONICITY: Reading = Reading {
360    name: "inharmonicity",
361    takes: &[Arg::Frame, Arg::Floor],
362    reads: Reads::Either,
363    help: "its harmonic series per frame: each member's cents off n f1, the stiff-string B each \
364           fits, and the energy in no series; measured partials off every channel's power per \
365           bin averaged",
366    build: |g| Representation::Harmony {
367        reading: Harmonic::Inharmonicity,
368        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
369        floor_db: g.floor_db,
370    },
371};
372
373static PERIODICITY: Reading = Reading {
374    name: "periodicity",
375    takes: &[Arg::Frame, Arg::Window, Arg::Curve],
376    reads: Reads::Samples,
377    help: "how strongly its onset strength repeats per sliding window, broadband, under 150 Hz \
378           and over: the leading periods in seconds and bpm with their bounds, their \
379           autocorrelation heights, the drift between windows; every channel's band energy \
380           averaged",
381    build: |g| Representation::Periodicity {
382        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
383        window_secs: g.window.unwrap_or(DEFAULT_PERIODICITY_WINDOW_SECS),
384        curve: g.curve,
385    },
386};
387
388static MODULATION: Reading = Reading {
389    name: "modulation",
390    takes: &[Arg::Frame, Arg::Window, Arg::Bpm],
391    reads: Reads::Samples,
392    help: "how its band envelopes move per sliding window, under 150 Hz, to 2 kHz and over: \
393           the leading modulation rates from 0.5 to 20 Hz, in beats where `bpm` is given, \
394           their depth as a modulation index, each with its bounds, the level, and the \
395           spectral centroid's mean and its own swing in Hz; every channel's band energy \
396           averaged",
397    build: |g| Representation::Modulation {
398        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
399        window_secs: g.window.unwrap_or(DEFAULT_MODULATION_WINDOW_SECS),
400        bpm: g.bpm,
401    },
402};
403
404static SELF_SIMILARITY: Reading = Reading {
405    name: "self_similarity",
406    takes: &[
407        Arg::Frame,
408        Arg::Cell,
409        Arg::Smooth,
410        Arg::Window,
411        Arg::Floor,
412        Arg::Peaks,
413        Arg::Curve,
414    ],
415    reads: Reads::Samples,
416    help: "how its stretches resemble one another, by chroma and by band levels, over cells \
417           of `cell`: the repeated stretches as stripes, each pair of spans with its \
418           similarity and, by chroma, its transposition in semitones; Foote's novelty at every \
419           cell boundary and its peaks; `curve=1` adds the cells and the matrix; every \
420           channel's power per bin and band energy averaged",
421    build: |g| Representation::SelfSimilarity {
422        frame_secs: g.frame.unwrap_or(DEFAULT_FRAME_SECS),
423        cell_secs: g.cell_secs,
424        smooth_secs: g.smooth_secs,
425        window_secs: g.window.unwrap_or(DEFAULT_NOVELTY_WINDOW_SECS),
426        floor_db: g.floor_db,
427        listed: g.peaks,
428        curve: g.curve,
429    },
430};
431
432static BINDINGS: Reading = Reading {
433    name: "bindings",
434    takes: &[Arg::Node],
435    reads: Reads::Structure,
436    help: "the bindings one instance resolved, each with its source",
437    build: |_| Representation::Bindings,
438};
439
440static ARGUMENTS: Reading = Reading {
441    name: "arguments",
442    takes: &[],
443    reads: Reads::Structure,
444    help: "each builtin call's named arguments as the numbers it was lowered with",
445    build: |_| Representation::Arguments,
446};
447
448/// Every reading a caller may ask for, in the order a listing prints them.
449pub static READINGS: [&Reading; 24] = [
450    &LINES,
451    &ATOMS,
452    &SPECTRUM,
453    &ENVELOPE,
454    &DERIVATIVE,
455    &SAMPLES,
456    &LEDGER,
457    &PITCH,
458    &FORMANTS,
459    &STEREO,
460    &BANDS,
461    &CREST,
462    &LOUDNESS,
463    &ONSETS,
464    &ALIAS,
465    &DISSONANCE,
466    &VOICE_LEADING,
467    &TONAL_DISTANCE,
468    &INHARMONICITY,
469    &PERIODICITY,
470    &MODULATION,
471    &SELF_SIMILARITY,
472    &BINDINGS,
473    &ARGUMENTS,
474];
475
476#[derive(Clone, Copy, Debug, PartialEq)]
477pub enum Representation {
478    Lines,
479    Atoms,
480    Spectrum {
481        max_peaks: usize,
482        frame_secs: Option<f64>,
483    },
484    Envelope {
485        frame_secs: Option<f64>,
486    },
487    Derivative,
488    Samples,
489    Ledger {
490        depth: usize,
491    },
492    Pitch {
493        max_notes: usize,
494        frame_secs: f64,
495    },
496    Formants {
497        max_formants: usize,
498        frame_secs: f64,
499    },
500    Stereo {
501        frame_secs: f64,
502    },
503    Bands,
504    Crest,
505    Loudness,
506    Onsets,
507    Alias {
508        oversample: u32,
509    },
510    /// The partials it is read from step by `frame_secs` and stop at `floor_db`.
511    Harmony {
512        reading: Harmonic,
513        frame_secs: f64,
514        floor_db: f64,
515    },
516    /// Windows of `window_secs` centred every `frame_secs`; `curve` adds each one's heights.
517    Periodicity {
518        frame_secs: f64,
519        window_secs: f64,
520        curve: bool,
521    },
522    /// Windows of `window_secs` centred every `frame_secs`; `bpm` adds each rate in beats.
523    Modulation {
524        frame_secs: f64,
525        window_secs: f64,
526        bpm: Option<f64>,
527    },
528    /// Cells of `cell_secs` over frames every `frame_secs`; `listed` stripes and peaks are
529    /// listed, and `curve` adds the cells and matrices.
530    SelfSimilarity {
531        frame_secs: f64,
532        cell_secs: f64,
533        smooth_secs: f64,
534        window_secs: f64,
535        floor_db: f64,
536        listed: usize,
537        curve: bool,
538    },
539    Bindings,
540    Arguments,
541}
542
543/// The readings taken off one curve of partials.
544#[derive(Clone, Copy, Debug, PartialEq, Eq)]
545pub enum Harmonic {
546    Dissonance { max_pairs: usize },
547    VoiceLeading { norm: Norm },
548    TonalDistance,
549    Inharmonicity,
550}
551
552/// What a caller asked of one node.
553#[derive(Clone, Debug, PartialEq)]
554pub struct Ask {
555    pub node: String,
556    pub representation: Representation,
557}
558
559#[derive(Clone, Debug, PartialEq)]
560pub enum Output {
561    Lines(Vec<Line>),
562    Atoms(Vec<Atom>),
563    Symbolic(Box<SpectralSum>),
564    Samples(Box<Buffer>),
565    Spectrum(Box<Spectrum>),
566    Envelope(Vec<EnvelopeFrame>),
567    Pitch(Vec<PitchFrame>),
568    Formants(Vec<FormantFrame>),
569    Stereo(Box<StereoImage>),
570    Bands(Box<Bands>),
571    Crest(Box<Crest>),
572    Loudness(Box<Loudness>),
573    Onsets(Box<Onsets>),
574    Alias(Box<Alias>),
575    Ledger(Vec<LedgerEntry>),
576    Dissonance(Box<Dissonance>),
577    VoiceLeading(Box<VoiceLeading>),
578    TonalDistance(Box<TonalDistance>),
579    Inharmonicity(Box<Inharmonicity>),
580    Periodicity(Box<Periodicity>),
581    Modulation(Box<Modulation>),
582    SelfSimilarity(Box<SelfSimilarity>),
583    Bindings(Vec<Binding>),
584    Arguments(Vec<Arguments>),
585}
586
587/// `amp (x-polynomial_at)^degree e^(-decay (x-decay_from)) e^(2pi i turns x)` on `[start, end)`
588#[derive(Clone, Debug, PartialEq)]
589pub struct Atom {
590    pub var: Var,
591    pub sketch: String,
592    pub amp: C64,
593    pub turns: f64,
594    pub decay: f64,
595    pub decay_from: f64,
596    pub degree: u16,
597    pub polynomial_at: f64,
598    pub start: Option<f64>,
599    pub end: Option<f64>,
600}
601
602/// Every answer says which reading ran and under which profile, so a caller never has to
603/// infer either from the shape of the value.
604#[derive(Clone, Debug, PartialEq)]
605pub struct Answer {
606    pub value: Output,
607    pub source: Source,
608    pub profile: &'static str,
609    pub rate: Option<u32>,
610    /// A series answers the terms it keeps, the tail beside them.
611    pub dropped: Vec<sva_formula::Line>,
612    pub tail_db: Option<f64>,
613}
614
615impl Answer {
616    pub fn whole(
617        value: Output,
618        source: Source,
619        profile: &'static str,
620        rate: Option<u32>,
621    ) -> Answer {
622        Answer {
623            value,
624            source,
625            profile,
626            rate,
627            dropped: Vec::new(),
628            tail_db: None,
629        }
630    }
631}
632
633impl Representation {
634    /// Exhaustive, so a variant with no row is a compile error.
635    pub fn reading(self) -> &'static Reading {
636        match self {
637            Representation::Lines => &LINES,
638            Representation::Atoms => &ATOMS,
639            Representation::Spectrum { .. } => &SPECTRUM,
640            Representation::Envelope { .. } => &ENVELOPE,
641            Representation::Derivative => &DERIVATIVE,
642            Representation::Samples => &SAMPLES,
643            Representation::Ledger { .. } => &LEDGER,
644            Representation::Pitch { .. } => &PITCH,
645            Representation::Formants { .. } => &FORMANTS,
646            Representation::Stereo { .. } => &STEREO,
647            Representation::Bands => &BANDS,
648            Representation::Crest => &CREST,
649            Representation::Loudness => &LOUDNESS,
650            Representation::Onsets => &ONSETS,
651            Representation::Alias { .. } => &ALIAS,
652            Representation::Harmony { reading, .. } => match reading {
653                Harmonic::Dissonance { .. } => &DISSONANCE,
654                Harmonic::VoiceLeading { .. } => &VOICE_LEADING,
655                Harmonic::TonalDistance => &TONAL_DISTANCE,
656                Harmonic::Inharmonicity => &INHARMONICITY,
657            },
658            Representation::Periodicity { .. } => &PERIODICITY,
659            Representation::Modulation { .. } => &MODULATION,
660            Representation::SelfSimilarity { .. } => &SELF_SIMILARITY,
661            Representation::Bindings => &BINDINGS,
662            Representation::Arguments => &ARGUMENTS,
663        }
664    }
665
666    pub fn name(self) -> &'static str {
667        self.reading().name
668    }
669
670    pub fn consumes(self, closed: bool) -> Consumes {
671        self.reading().reads.consumes(closed)
672    }
673
674    /// Whether a node's samples alone answer this reading, `sampled` where it holds samples.
675    pub fn off_samples(self, sampled: bool) -> bool {
676        self.reading().reads.off_samples(sampled)
677    }
678
679    pub fn from_name(name: &str) -> Option<Representation> {
680        READINGS
681            .iter()
682            .find(|row| row.name == name)
683            .map(|row| row.representation(&Given::default()))
684    }
685}
sva_engine/query.rs

sva_engine/
query.rs
