68 lines
1.6 KiB
Rust
68 lines
1.6 KiB
Rust
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// vim: noet
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use std::process::exit;
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use byteorder::{NativeEndian, ReadBytesExt};
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use mlua::Lua;
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mod signal_processing;
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mod config;
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use crate::signal_processing::SignalProcessing;
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fn main()
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{
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let mut stdin = std::io::stdin();
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// test the mlua crate
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let lua_state = Lua::new();
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lua_state.globals().set("get_rust_value", lua_state.create_function(|_, ()| {
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Ok(3)
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}).unwrap()).unwrap();
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let user_script = std::fs::read_to_string("test.lua").unwrap();
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lua_state.load(&user_script).exec().unwrap();
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let lua_func_test : mlua::Function = lua_state.globals().get("test").unwrap();
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println!("{}", lua_func_test.call::<_, u32>(123).unwrap());
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let mut sigproc = SignalProcessing::new(config::BLOCK_LEN, config::SAMP_RATE).unwrap();
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println!("Done! Starting main loop…");
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// array for samples directly read from stream
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let mut samples = [0i16; config::BLOCK_LEN];
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// main loop
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loop {
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// read a block of samples and exit gracefully on EOF
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for sample in samples.iter_mut() {
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let res = stdin.read_i16::<NativeEndian>();
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match res {
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Ok(s) => *sample = s,
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Err(e) if e.kind() == std::io::ErrorKind::UnexpectedEof => {
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println!("End of stream. Exiting.");
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exit(0);
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},
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Err(e) => panic!(e)
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}
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}
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sigproc.import_i16_mono(&samples).unwrap();
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sigproc.update_fft().unwrap();
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let energy_bass = sigproc.get_energy_in_band( 0.0, 400.0);
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let energy_mid = sigproc.get_energy_in_band( 400.0, 4000.0);
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let energy_treble = sigproc.get_energy_in_band(4000.0, config::SAMP_RATE/2.0);
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// dump the output
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println!("Bass: {:8.2} – Mid: {:8.2} – Treble: {:8.2}", energy_bass, energy_mid, energy_treble);
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}
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}
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