862 lines
22 KiB
Rust
862 lines
22 KiB
Rust
// Copyright (c) 2021 Weird Constructor <weirdconstructor@gmail.com>
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// This file is a part of HexoDSP. Released under GPL-3.0-or-later.
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// See README.md and COPYING for details.
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pub use hexodsp::dsp::*;
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pub use hexodsp::matrix::*;
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pub use hexodsp::nodes::new_node_engine;
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pub use hexodsp::NodeExecutor;
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use hound;
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pub const SAMPLE_RATE: f32 = 44100.0;
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#[allow(dead_code)]
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pub const SAMPLE_RATE_US: usize = 44100;
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#[macro_export]
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macro_rules! init_test {
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($matrix: ident, $node_exec: ident, $size: expr) => {
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let (node_conf, mut node_exec) = new_node_engine();
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let mut matrix = Matrix::new(node_conf, $size, $size);
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let $matrix = &mut matrix;
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let $node_exec = &mut node_exec;
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};
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}
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#[macro_export]
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macro_rules! assert_float_eq {
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($a:expr, $b:expr) => {
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if ($a - $b).abs() > 0.0001 {
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panic!(
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r#"assertion failed: `(left == right)`
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left: `{:?}`,
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right: `{:?}`"#,
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$a, $b
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)
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}
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};
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}
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#[macro_export]
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macro_rules! assert_fpair_eq {
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($a:expr, $b:expr) => {
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if ($a.0 - $b.0).abs() > 0.0001 {
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panic!(
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r#"assertion failed: `(left.0 == right.0)`
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left: `{:?}`,
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right: `{:?}`"#,
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$a.0, $b.0
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)
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}
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if ($a.1 - $b.1).abs() > 0.0001 {
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panic!(
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r#"assertion failed: `(left.1 == right.1)`
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left: `{:?}`,
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right: `{:?}`"#,
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$a.1, $b.1
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)
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}
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};
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}
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#[macro_export]
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macro_rules! assert_f3tupl_eq {
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($a:expr, $b:expr) => {
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if ($a.0 - $b.0).abs() > 0.0001 {
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panic!(
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r#"assertion failed: `(left.0 == right.0)`
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left.0: `{:?}`,
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right.0: `{:?}`"#,
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$a.0, $b.0
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)
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}
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if ($a.1 - $b.1).abs() > 0.0001 {
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panic!(
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r#"assertion failed: `(left.1 == right.1)`
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left.1: `{:?}`,
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right.1: `{:?}`"#,
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$a.1, $b.1
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)
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}
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if ($a.2 - $b.2).abs() > 0.0001 {
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panic!(
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r#"assertion failed: `(left.2 == right.2)`
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left.2: `{:?}`,
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right.2: `{:?}`"#,
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$a.2, $b.2
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)
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}
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};
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}
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#[macro_export]
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macro_rules! assert_vec_feq {
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($vec:expr, $cmp_vec:expr) => {
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let cmp_vec = $cmp_vec;
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let res: Vec<f32> = $vec.iter().copied().collect();
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for (i, (s, scmp)) in res.iter().zip(cmp_vec.iter()).enumerate() {
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if (s - scmp).abs() > 0.0001 {
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panic!(
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r#"
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table_left: {:?}
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table_right: {:?}
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assertion failed: `(left[{}] == right[{}])`
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left: `{:?}`,
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right: `{:?}`"#,
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&res[i..],
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&(cmp_vec[i..]),
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i,
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i,
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s,
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scmp
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)
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}
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}
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};
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}
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#[macro_export]
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macro_rules! assert_decimated_feq {
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($vec:expr, $decimate:expr, $cmp_vec:expr) => {
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let cmp_vec = $cmp_vec;
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let res: Vec<f32> = $vec.iter().step_by($decimate).copied().collect();
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for (i, (s, scmp)) in res.iter().zip(cmp_vec.iter()).enumerate() {
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if (s - scmp).abs() > 0.0001 {
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panic!(
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r#"
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table_left: {:?}
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table_right: {:?}
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assertion failed: `(left[{}] == right[{}])`
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left: `{:?}`,
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right: `{:?}`"#,
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&res[i..],
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&(cmp_vec[i..]),
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i,
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i,
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s,
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scmp
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)
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}
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}
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};
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}
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#[macro_export]
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macro_rules! assert_slope_feq {
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($vec:expr, $cmp_vec:expr) => {
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let cmp_vec = $cmp_vec;
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let mut res: Vec<f32> = vec![];
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let mut prev = 0.0;
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for (i, s) in $vec.iter().enumerate() {
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let delta = *s - prev;
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if i > 0 {
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res.push(delta);
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}
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prev = *s;
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}
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let res: Vec<f32> = res.iter().copied().collect();
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for (i, (s, scmp)) in res.iter().zip(cmp_vec.iter()).enumerate() {
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if (s - scmp).abs() > 0.0001 {
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panic!(
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r#"
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table_left: {:?}
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table_right: {:?}
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assertion failed: `(left[{}] == right[{}])`
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left: `{:?}`,
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right: `{:?}`"#,
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&res[i..],
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&(cmp_vec[i..]),
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i,
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i,
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s,
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scmp
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)
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}
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}
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};
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}
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#[macro_export]
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macro_rules! assert_decimated_slope_feq {
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($vec:expr, $decimate:expr, $cmp_vec:expr) => {
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let cmp_vec = $cmp_vec;
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let mut res: Vec<f32> = vec![];
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let mut prev = 0.0;
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for (i, s) in $vec.iter().enumerate() {
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let delta = *s - prev;
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if i > 0 {
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res.push(delta);
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}
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prev = *s;
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}
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let res: Vec<f32> = res.iter().step_by($decimate).copied().collect();
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for (i, (s, scmp)) in res.iter().zip(cmp_vec.iter()).enumerate() {
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if (s - scmp).abs() > 0.0001 {
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panic!(
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r#"
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table_left: {:?}
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table_right: {:?}
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assertion failed: `(left[{}] == right[{}])`
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left: `{:?}`,
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right: `{:?}`"#,
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&res[i..],
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&(cmp_vec[i..]),
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i,
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i,
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s,
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scmp
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)
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}
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}
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};
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}
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#[macro_export]
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macro_rules! assert_decimated_slope_feq_fine {
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($vec:expr, $decimate:expr, $cmp_vec:expr) => {
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let cmp_vec = $cmp_vec;
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let mut res: Vec<f32> = vec![];
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let mut prev = 0.0;
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for (i, s) in $vec.iter().enumerate() {
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let delta = *s - prev;
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if i > 0 {
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res.push(delta);
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}
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prev = *s;
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}
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let res: Vec<f32> = res.iter().step_by($decimate).copied().collect();
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for (i, (s, scmp)) in res.iter().zip(cmp_vec.iter()).enumerate() {
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if (s - scmp).abs() > 0.0000001 {
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panic!(
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r#"
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table_left: {:?}
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table_right: {:?}
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assertion failed: `(left[{}] == right[{}])`
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left: `{:?}`,
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right: `{:?}`"#,
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&res[i..],
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&(cmp_vec[i..]),
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i,
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i,
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s,
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scmp
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)
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}
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}
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};
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}
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#[macro_export]
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macro_rules! assert_decimated_slope_feq_sfine {
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($vec:expr, $decimate:expr, $cmp_vec:expr) => {
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let cmp_vec = $cmp_vec;
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let mut res: Vec<f32> = vec![];
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let mut prev = 0.0;
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for (i, s) in $vec.iter().enumerate() {
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let delta = *s - prev;
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if i > 0 {
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res.push(delta);
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}
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prev = *s;
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}
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let res: Vec<f32> = res.iter().step_by($decimate).copied().collect();
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for (i, (s, scmp)) in res.iter().zip(cmp_vec.iter()).enumerate() {
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if (s - scmp).abs() > 0.000000001 {
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panic!(
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r#"
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table_left: {:?}
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table_right: {:?}
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assertion failed: `(left[{}] == right[{}])`
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left: `{:?}`,
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right: `{:?}`"#,
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&res[i..],
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&(cmp_vec[i..]),
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i,
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i,
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s,
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scmp
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)
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}
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}
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};
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}
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#[macro_export]
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macro_rules! dump_table {
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($vec:expr) => {
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for (i, s) in $vec.iter().enumerate() {
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println!("{:2} {:?}", i, s);
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}
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};
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}
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#[allow(dead_code)]
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pub fn collect_signal_changes(inp: &[f32], thres: i64) -> Vec<(usize, i64)> {
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let mut idxs = vec![];
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let mut last_sig = 0.0;
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for i in 0..inp.len() {
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if (inp[i] - last_sig).abs() > 0.1 {
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idxs.push((i, (inp[i] * 100.0).floor() as i64));
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last_sig = inp[i];
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}
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}
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let mut idxs_big = vec![];
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for v in idxs.iter() {
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if v.1.abs() > thres {
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idxs_big.push(*v);
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}
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}
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return idxs_big;
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}
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#[allow(dead_code)]
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pub fn collect_non_zero(inp: &[f32]) -> Vec<(usize, usize)> {
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let mut idxs = vec![];
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let mut start_idx = 0;
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let mut length = 0;
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for i in 0..inp.len() {
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if inp[i].abs() > 0.00001 {
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if length == 0 {
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start_idx = i;
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}
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length += 1;
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} else {
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if length > 0 {
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idxs.push((start_idx, length));
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length = 0;
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}
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}
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}
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return idxs;
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}
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#[allow(dead_code)]
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pub fn collect_gates(inp: &[f32]) -> Vec<(usize, usize)> {
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let mut idxs = vec![];
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let mut start_idx = 0;
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let mut length = 0;
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for i in 0..inp.len() {
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if inp[i].abs() > 0.1 {
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if length == 0 {
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start_idx = i;
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}
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length += 1;
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} else {
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if length > 0 {
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idxs.push((start_idx, length));
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length = 0;
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}
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}
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}
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return idxs;
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}
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#[macro_export]
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macro_rules! assert_rmsmima {
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($rms:expr, $b:expr) => {
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assert_f3tupl_eq!($rms, $b);
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};
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}
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#[macro_export]
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macro_rules! assert_minmax_of_rms {
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($rms:expr, $b:expr) => {
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let (_, min, max) = $rms;
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assert_fpair_eq!((min, max), $b);
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};
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}
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#[allow(unused)]
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pub fn pset_s(matrix: &mut Matrix, nid: NodeId, parm: &str, set: i64) {
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let p = nid.inp_param(parm).unwrap();
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matrix.set_param(p, SAtom::setting(set));
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}
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#[allow(unused)]
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pub fn pset_n(matrix: &mut Matrix, nid: NodeId, parm: &str, v_norm: f32) {
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let p = nid.inp_param(parm).unwrap();
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matrix.set_param(p, SAtom::param(v_norm));
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}
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#[allow(unused)]
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pub fn pset_d(matrix: &mut Matrix, nid: NodeId, parm: &str, v_denorm: f32) {
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let p = nid.inp_param(parm).unwrap();
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matrix.set_param(p, SAtom::param(p.norm(v_denorm)));
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}
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#[allow(unused)]
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pub fn pset_n_wait(
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matrix: &mut Matrix,
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ne: &mut NodeExecutor,
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nid: NodeId,
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parm: &str,
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v_norm: f32,
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) {
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let p = nid.inp_param(parm).unwrap();
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matrix.set_param(p, SAtom::param(v_norm));
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run_for_ms(ne, 15.0);
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}
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#[allow(unused)]
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pub fn pset_d_wait(
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matrix: &mut Matrix,
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ne: &mut NodeExecutor,
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nid: NodeId,
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parm: &str,
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v_denorm: f32,
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) {
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let p = nid.inp_param(parm).unwrap();
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matrix.set_param(p, SAtom::param(p.norm(v_denorm)));
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run_for_ms(ne, 15.0);
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}
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#[allow(unused)]
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pub fn pset_mod(matrix: &mut Matrix, nid: NodeId, parm: &str, modamt: f32) {
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let p = nid.inp_param(parm).unwrap();
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matrix.set_param_modamt(p, Some(modamt));
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}
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#[allow(unused)]
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pub fn pset_mod_wait(
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matrix: &mut Matrix,
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ne: &mut NodeExecutor,
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nid: NodeId,
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parm: &str,
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modamt: f32,
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) {
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let p = nid.inp_param(parm).unwrap();
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matrix.set_param_modamt(p, Some(modamt));
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run_for_ms(ne, 15.0);
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}
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#[allow(dead_code)]
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pub fn save_wav(name: &str, buf: &[f32]) {
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let spec = hound::WavSpec {
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channels: 1,
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sample_rate: SAMPLE_RATE as u32,
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bits_per_sample: 16,
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sample_format: hound::SampleFormat::Int,
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};
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let mut writer = hound::WavWriter::create(name, spec).unwrap();
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for s in buf.iter() {
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let amp = i16::MAX as f32;
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writer.write_sample((amp * s) as i16).unwrap();
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}
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}
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pub fn run_no_input(
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node_exec: &mut hexodsp::nodes::NodeExecutor,
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seconds: f32,
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) -> (Vec<f32>, Vec<f32>) {
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run_realtime_no_input(node_exec, seconds, false)
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}
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#[allow(dead_code)]
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pub fn run_for_ms(node_exec: &mut hexodsp::nodes::NodeExecutor, ms: f32) -> (Vec<f32>, Vec<f32>) {
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run_realtime_no_input(node_exec, ms / 1000.0, false)
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}
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pub fn run_realtime_no_input(
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node_exec: &mut hexodsp::nodes::NodeExecutor,
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seconds: f32,
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sleep_a_bit: bool,
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) -> (Vec<f32>, Vec<f32>) {
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node_exec.test_run(seconds, sleep_a_bit)
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}
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pub fn calc_rms_mimax_each_ms(buf: &[f32], ms: f32) -> Vec<(f32, f32, f32)> {
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let ms_samples = ms * SAMPLE_RATE / 1000.0;
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let len_ms = ms_samples as usize;
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let mut idx = 0;
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let mut res = vec![];
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loop {
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if (idx + len_ms) > buf.len() {
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break;
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}
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let mut max = -1000.0;
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let mut min = 1000.0;
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for s in buf[idx..(idx + len_ms)].iter() {
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max = s.max(max);
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min = s.min(min);
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}
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let rms: f32 =
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buf[idx..(idx + len_ms)].iter().map(|s: &f32| s * s).sum::<f32>() / ms_samples;
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res.push((rms, min, max));
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idx += len_ms;
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}
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res
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}
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#[allow(dead_code)]
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pub fn run_and_undersample(
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node_exec: &mut hexodsp::nodes::NodeExecutor,
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run_len_ms: f32,
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samples: usize,
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) -> Vec<f32> {
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let (out_l, _out_r) = run_no_input(node_exec, run_len_ms / 1000.0);
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let sample_interval = out_l.len() / samples;
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let mut out_samples = vec![];
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for i in 0..samples {
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let idx = i * sample_interval;
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|
out_samples.push(out_l[idx]);
|
|
}
|
|
|
|
out_samples
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
pub fn run_and_get_each_rms_mimax(
|
|
node_exec: &mut hexodsp::nodes::NodeExecutor,
|
|
len_ms: f32,
|
|
) -> Vec<(f32, f32, f32)> {
|
|
let (out_l, _out_r) = run_no_input(node_exec, (len_ms * 3.0) / 1000.0);
|
|
calc_rms_mimax_each_ms(&out_l[..], len_ms)
|
|
}
|
|
|
|
/// Get the rms of a specified amount of time 'len_ms' and take samples
|
|
/// of RMS, Min and Max each 'sample_ms' (of the same length).
|
|
///
|
|
/// * 'len_ms' - complete runtime
|
|
/// * 'sample_ms' - length of each rms sample
|
|
#[allow(dead_code)]
|
|
pub fn run_and_get_rms_mimax(
|
|
node_exec: &mut hexodsp::nodes::NodeExecutor,
|
|
len_ms: f32,
|
|
sample_ms: f32,
|
|
) -> Vec<(f32, f32, f32)> {
|
|
let (out_l, _out_r) = run_no_input(node_exec, len_ms / 1000.0);
|
|
calc_rms_mimax_each_ms(&out_l[..], sample_ms)
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
pub fn run_and_get_first_rms_mimax(
|
|
node_exec: &mut hexodsp::nodes::NodeExecutor,
|
|
len_ms: f32,
|
|
) -> (f32, f32, f32) {
|
|
let (out_l, _out_r) = run_no_input(node_exec, (len_ms * 3.0) / 1000.0);
|
|
let rms_mimax = calc_rms_mimax_each_ms(&out_l[..], len_ms);
|
|
rms_mimax[0]
|
|
}
|
|
|
|
#[allow(unused)]
|
|
pub fn run_and_get_l_rms_mimax(
|
|
node_exec: &mut hexodsp::nodes::NodeExecutor,
|
|
len_ms: f32,
|
|
) -> (f32, f32, f32) {
|
|
let (out_l, _out_r) = run_no_input(node_exec, (len_ms * 3.0) / 1000.0);
|
|
let rms_mimax = calc_rms_mimax_each_ms(&out_l[..], len_ms);
|
|
rms_mimax[1]
|
|
}
|
|
|
|
#[allow(unused)]
|
|
pub fn run_and_get_counted_freq(node_exec: &mut hexodsp::nodes::NodeExecutor, ms: f32) -> f64 {
|
|
let (out_l, _out_r) =
|
|
// +0.1 here for some extra samples
|
|
// this is just for tuning the frequency counter, so that it detects
|
|
// the last swing correctly. It's probably wrong, but the results
|
|
// match up better this way.
|
|
run_no_input(node_exec, (ms + 0.1) / 1000.0);
|
|
|
|
let mut zero_trans = 0;
|
|
let mut last_val = 0.0;
|
|
|
|
for s in out_l.iter() {
|
|
if last_val >= 0.0 && *s < 0.0 {
|
|
zero_trans += 1;
|
|
} else if last_val <= 0.0 && *s > 0.0 {
|
|
zero_trans += 1;
|
|
}
|
|
|
|
last_val = *s;
|
|
}
|
|
|
|
println!("SAMPLES: {}", out_l.len());
|
|
println!("ZERO TRANS: {}", zero_trans);
|
|
|
|
let trans_per_sample =
|
|
// substract the extra samples applied earlier.
|
|
(zero_trans as f64) / ((out_l.len() - 4) as f64);
|
|
trans_per_sample * 44100.0 * 0.5
|
|
}
|
|
|
|
#[allow(unused)]
|
|
pub fn run_and_get_fft4096(
|
|
node_exec: &mut hexodsp::nodes::NodeExecutor,
|
|
thres: u32,
|
|
offs_ms: f32,
|
|
) -> Vec<(u16, u32)> {
|
|
let min_samples_for_fft = 4096.0;
|
|
let offs_samples = (offs_ms * (SAMPLE_RATE / 1000.0)).ceil();
|
|
let min_len_samples = offs_samples
|
|
// 2.0 * for safety margin
|
|
+ 2.0 * min_samples_for_fft;
|
|
let run_len_s = min_len_samples / SAMPLE_RATE;
|
|
let (mut out_l, _out_r) = run_no_input(node_exec, run_len_s);
|
|
fft_thres_at_ms(&mut out_l[..], FFT::F4096, thres, offs_ms)
|
|
}
|
|
|
|
#[allow(unused)]
|
|
pub fn run_and_get_fft4096_2(
|
|
node_exec: &mut hexodsp::nodes::NodeExecutor,
|
|
thres: u32,
|
|
) -> Vec<(u16, u32)> {
|
|
let min_samples_for_fft = 4096.0;
|
|
let min_len_samples = 2.0 * min_samples_for_fft;
|
|
let run_len_s = min_len_samples / SAMPLE_RATE;
|
|
let (mut out_l, _out_r) = run_no_input(node_exec, run_len_s);
|
|
fft(&mut out_l[..], FFT::F4096, thres)
|
|
}
|
|
|
|
/// Minimal 'each_ms' is 47ms, because each spectrum takes that time.
|
|
#[allow(unused)]
|
|
pub fn run_fft_spectrum_each_47ms(
|
|
node_exec: &mut hexodsp::nodes::NodeExecutor,
|
|
thres: u32,
|
|
count: usize,
|
|
) -> Vec<Vec<(u16, u32)>> {
|
|
let mut out = vec![];
|
|
|
|
for _ in 0..count {
|
|
let min_samples_for_fft = 1024.0;
|
|
let min_len_samples = 2.0 * min_samples_for_fft;
|
|
let run_len_s = min_len_samples / SAMPLE_RATE;
|
|
let offs_ms = (run_len_s * 1000.0);
|
|
let (mut out_l, _out_r) = run_no_input(node_exec, run_len_s);
|
|
out.push(fft(&mut out_l[..], FFT::F1024, thres));
|
|
}
|
|
|
|
out
|
|
}
|
|
|
|
#[allow(unused)]
|
|
pub fn calc_exp_avg_buckets4096(fft: &[(u16, u32)]) -> Vec<(u16, u32)> {
|
|
let mut avg = vec![];
|
|
let mut last_n = [0; 256];
|
|
let mut p = 0;
|
|
let mut cur_len = 2;
|
|
|
|
for (i, (fq, lvl)) in fft.iter().enumerate() {
|
|
last_n[p] = *lvl;
|
|
p += 1;
|
|
if p >= cur_len {
|
|
avg.push((
|
|
*fq,
|
|
last_n.iter().take(cur_len).map(|x| *x).sum::<u32>() / (cur_len as u32),
|
|
));
|
|
p = 0;
|
|
}
|
|
|
|
if i % 16 == 0 {
|
|
cur_len += 2;
|
|
if cur_len > last_n.len() {
|
|
cur_len = last_n.len();
|
|
}
|
|
//d// println!("len={}", cur_len);
|
|
}
|
|
}
|
|
|
|
avg
|
|
}
|
|
|
|
#[allow(unused)]
|
|
pub fn avg_fft_freqs(round_by: f32, ranges: &[u16], fft: &[(u16, u32)]) -> Vec<(u16, u32)> {
|
|
let mut from = 0;
|
|
let mut out = vec![];
|
|
for rng in ranges.iter() {
|
|
out.push((from, ((avg_fft_range(from, *rng, fft) / round_by).floor() * round_by) as u32));
|
|
from = *rng;
|
|
}
|
|
|
|
out
|
|
}
|
|
|
|
#[allow(unused)]
|
|
pub fn avg_fft_range(from_freq: u16, to_freq: u16, fft: &[(u16, u32)]) -> f32 {
|
|
let mut count = 0;
|
|
let mut sum = 0;
|
|
for (fq, lvl) in fft.iter() {
|
|
if from_freq <= *fq && *fq < to_freq {
|
|
sum += *lvl;
|
|
count += 1;
|
|
}
|
|
}
|
|
|
|
sum as f32 / count as f32
|
|
}
|
|
|
|
#[allow(unused)]
|
|
pub fn run_and_get_fft512(
|
|
node_exec: &mut hexodsp::nodes::NodeExecutor,
|
|
thres: u32,
|
|
offs_ms: f32,
|
|
) -> Vec<(u16, u32)> {
|
|
let min_samples_for_fft = 512.0;
|
|
let offs_samples = (offs_ms * (SAMPLE_RATE / 1000.0)).ceil();
|
|
let min_len_samples = offs_samples
|
|
// 2.0 * for safety margin
|
|
+ 2.0 * min_samples_for_fft;
|
|
let run_len_s = min_len_samples / SAMPLE_RATE;
|
|
let (mut out_l, _out_r) = run_no_input(node_exec, run_len_s);
|
|
fft_thres_at_ms(&mut out_l[..], FFT::F512, thres, offs_ms)
|
|
}
|
|
|
|
#[allow(unused)]
|
|
pub fn run_and_get_fft4096_now(
|
|
node_exec: &mut hexodsp::nodes::NodeExecutor,
|
|
thres: u32,
|
|
) -> Vec<(u16, u32)> {
|
|
let min_samples_for_fft = 4096.0 * 1.5; // 1.5 for some extra margin
|
|
let run_len_s = min_samples_for_fft / SAMPLE_RATE;
|
|
let (mut out_l, _out_r) = run_no_input(node_exec, run_len_s);
|
|
fft_thres_at_ms(&mut out_l[..], FFT::F4096, thres, 0.0)
|
|
}
|
|
|
|
/// Takes about 1 second of audio to average 10 ffts
|
|
#[allow(unused)]
|
|
pub fn run_and_get_avg_fft4096_now(
|
|
node_exec: &mut hexodsp::nodes::NodeExecutor,
|
|
thres: u32,
|
|
) -> Vec<(u16, u32)> {
|
|
let min_samples_for_fft = 4096.0 * 1.5; // 1.5 for some extra margin
|
|
let run_len_s = min_samples_for_fft / SAMPLE_RATE;
|
|
|
|
let (mut out_l, _out_r) = run_no_input(node_exec, run_len_s);
|
|
let mut data = fft_thres_at_ms(&mut out_l[..], FFT::F4096, 0, 0.0);
|
|
|
|
for _ in 0..9 {
|
|
let (mut out_l, _out_r) = run_no_input(node_exec, run_len_s);
|
|
let out = fft_thres_at_ms(&mut out_l[..], FFT::F4096, 0, 0.0);
|
|
for (x, d) in out.iter().zip(data.iter_mut()) {
|
|
d.1 += x.1;
|
|
}
|
|
}
|
|
|
|
for d in data.iter_mut() {
|
|
d.1 /= 10;
|
|
}
|
|
|
|
data.iter().filter(|d| d.1 >= thres).copied().collect()
|
|
}
|
|
|
|
#[allow(unused)]
|
|
pub enum FFT {
|
|
F16,
|
|
F32,
|
|
F64,
|
|
F128,
|
|
F512,
|
|
F1024,
|
|
F2048,
|
|
F4096,
|
|
F8192,
|
|
F16384,
|
|
F65535,
|
|
}
|
|
|
|
impl FFT {
|
|
pub fn size(&self) -> usize {
|
|
match self {
|
|
FFT::F16 => 16,
|
|
FFT::F32 => 32,
|
|
FFT::F64 => 64,
|
|
FFT::F128 => 128,
|
|
FFT::F512 => 512,
|
|
FFT::F1024 => 1024,
|
|
FFT::F2048 => 2048,
|
|
FFT::F4096 => 4096,
|
|
FFT::F8192 => 8192,
|
|
FFT::F16384 => 16384,
|
|
FFT::F65535 => 65535,
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn fft_thres_at_ms(buf: &mut [f32], size: FFT, amp_thres: u32, ms_idx: f32) -> Vec<(u16, u32)> {
|
|
let ms_sample_offs = ms_idx * (SAMPLE_RATE / 1000.0);
|
|
let fft_nbins = size.size();
|
|
let len = fft_nbins;
|
|
let idx = ms_sample_offs as usize;
|
|
|
|
if (idx + len) > buf.len() {
|
|
return vec![];
|
|
}
|
|
|
|
fft(&mut buf[idx..(idx + len)], size, amp_thres)
|
|
}
|
|
|
|
pub fn fft(buf: &mut [f32], size: FFT, amp_thres: u32) -> Vec<(u16, u32)> {
|
|
let len = size.size();
|
|
let mut res = vec![];
|
|
|
|
if len > buf.len() {
|
|
return res;
|
|
}
|
|
|
|
// Hann window:
|
|
for (i, s) in buf[0..len].iter_mut().enumerate() {
|
|
let w = 0.5 * (1.0 - ((2.0 * std::f32::consts::PI * i as f32) / (len as f32 - 1.0)).cos());
|
|
*s *= w;
|
|
}
|
|
|
|
use rustfft::{num_complex::Complex, FftPlanner};
|
|
|
|
let mut complex_buf =
|
|
buf.iter().map(|s| Complex { re: *s, im: 0.0 }).collect::<Vec<Complex<f32>>>();
|
|
|
|
let mut p = FftPlanner::<f32>::new();
|
|
let fft = p.plan_fft_forward(len);
|
|
|
|
fft.process(&mut complex_buf[0..len]);
|
|
|
|
let amplitudes: Vec<_> = complex_buf[0..len].iter().map(|c| c.norm() as u32).collect();
|
|
// println!("fft: {:?}", &complex_buf[0..len]);
|
|
|
|
for (i, amp) in amplitudes.iter().enumerate() {
|
|
if *amp >= amp_thres {
|
|
let freq = (i as f32 * SAMPLE_RATE) / len as f32;
|
|
if freq > 22050.0 {
|
|
// no freqency images above nyquist...
|
|
continue;
|
|
}
|
|
// println!("{:6.0} {}", freq, *amp);
|
|
res.push((freq.round() as u16, *amp));
|
|
}
|
|
}
|
|
|
|
res
|
|
}
|