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extern crate byteorder;
extern crate libcodec2;
use byteorder::{LittleEndian, ReadBytesExt};
use std::fs::File;
use std::io::prelude::*;
use std::io::Cursor;
use std::path::Path;
use libcodec2::{Codec2, Modes};
struct Cli {
bit_rate: String,
in_path: std::path::PathBuf,
out_path: std::path::PathBuf,
}
const USAGE: &str = "Usage: c2enc <BITRATE> <INPUT_FILE> <OUTPUT_FILE>";
fn main() {
let bitrate_arg = std::env::args().nth(1).expect(USAGE);
let in_path_arg = std::env::args().nth(2).expect(USAGE);
let out_path_arg = std::env::args().nth(3).expect(USAGE);
let args = Cli {
bit_rate: String::from(bitrate_arg),
in_path: std::path::PathBuf::from(in_path_arg),
out_path: std::path::PathBuf::from(out_path_arg),
};
let in_path = Path::new(&args.in_path);
let mut file = File::open(&in_path).unwrap();
let mut buf = Vec::new();
file.read_to_end(&mut buf).unwrap();
let mut rdr = Cursor::new(buf);
let mut speech = Vec::new();
while let Ok(i) = rdr.read_i16::<LittleEndian>() {
speech.push(i);
}
let mode = match args.bit_rate.as_str() {
"3200" => Modes::Mode3200,
"2400" => Modes::Mode2400,
"1600" => Modes::Mode1600,
"1400" => Modes::Mode1400,
"1300" => Modes::Mode1300,
"1200" => Modes::Mode1200,
"700C" => Modes::Mode700C,
"450" => Modes::Mode450,
_ => Modes::Mode1400,
};
let c = Codec2::new(mode);
let nsam = c.samples_per_frame();
let nbits = c.bytes_per_frame();
let mut file = File::create(&args.out_path).unwrap();
for samples in speech.chunks_exact(nsam) {
// remainder frame will be dropped
let mut bits = vec![0u8; nbits];
c.encode(&samples, &mut bits);
file.write(&bits).unwrap();
}
file.flush().unwrap();
}
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