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pub mod sp;
pub mod dp;
#[cfg(test)]
mod tests {
use minimp3::{Decoder as Mp3Decoder, Frame as Mp3Frame, Error as Mp3Error};
use std::path::PathBuf;
use std::fs::File;
use audio_visualizer::{Channels, ChannelInterleavement};
use audio_visualizer::waveform::staticc::png_file::visualize;
use std::time::Instant;
use crate::simple::sp::apply_lpf_i16_sp;
use crate::simple::dp::apply_lpf_i16_dp;
use crate::test_util::{TEST_OUT_DIR, TEST_SAMPLES_DIR};
#[test]
fn test_visualize_lowpassed_data() {
let mut path = PathBuf::new();
path.push(TEST_SAMPLES_DIR);
path.push("sample_1");
let mut decoder = Mp3Decoder::new(File::open(path).unwrap());
let mut lrlr_mp3_samples = vec![];
loop {
match decoder.next_frame() {
Ok(Mp3Frame { data: samples_of_frame, .. }) => {
for sample in samples_of_frame {
lrlr_mp3_samples.push(sample);
}
}
Err(Mp3Error::Eof) => break,
Err(e) => panic!("{:?}", e),
}
}
visualize(
&lrlr_mp3_samples,
Channels::Stereo(ChannelInterleavement::LRLR),
TEST_OUT_DIR,
"sample_1_waveform.png"
);
let (mut left, mut right) = Channels::Stereo(ChannelInterleavement::LRLR)
.stereo_interleavement()
.to_channel_data(&lrlr_mp3_samples);
let now = Instant::now();
for _ in 0..3 {
apply_lpf_i16_sp(&mut left, 44100, 120);
}
let then = now.elapsed();
println!("took {}us to apply low pass filter for left channel ({}) samples", then.as_micros(), left.len());
apply_lpf_i16_sp(&mut right, 44100, 120);
visualize(
&left,
Channels::Mono,
TEST_OUT_DIR,
"sample_1_waveform_lowpassed_left.png"
);
visualize(
&right,
Channels::Mono,
TEST_OUT_DIR,
"sample_1_waveform_lowpassed_right.png"
);
}
#[test]
fn test_compare_sp_dp_lpf() {
let mut path = PathBuf::new();
path.push(TEST_SAMPLES_DIR);
path.push("sample_1.mp3");
let mut decoder = Mp3Decoder::new(File::open(path).unwrap());
let mut lrlr_mp3_samples = vec![];
loop {
match decoder.next_frame() {
Ok(Mp3Frame { data: samples_of_frame, .. }) => {
for sample in samples_of_frame {
lrlr_mp3_samples.push(sample);
}
}
Err(Mp3Error::Eof) => break,
Err(e) => panic!("{:?}", e),
}
}
let (mut left, mut right) = Channels::Stereo(ChannelInterleavement::LRLR)
.stereo_interleavement()
.to_channel_data(&lrlr_mp3_samples);
let sp_now = Instant::now();
apply_lpf_i16_sp(&mut left, 44100, 120);
let sp_duration = sp_now.elapsed().as_micros();
let dp_now = Instant::now();
apply_lpf_i16_dp(&mut right, 44100, 120);
let dp_duration = dp_now.elapsed().as_micros();
println!("sp lpf took: {}µs", sp_duration);
println!("dp lpf took: {}µs", dp_duration);
}
}