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|
use clap::{Parser, Subcommand};
use lvc::{
debug::draw_debug,
decode::decode,
encode::{encode, EncodeConfig},
huff::{read_huffman, write_huffman},
Block, Frame, Pixel, PixelValue, View, P2,
};
use std::{
io::{stdin, stdout, BufReader, BufWriter, Read, Write},
time::Instant,
};
#[derive(Parser)]
#[clap(about, version)]
struct Args {
// Width of the video signal
#[arg(short, long)]
width: u16,
// Height of the video signal
#[arg(short, long)]
height: u16,
#[clap(subcommand)]
action: Action,
}
#[derive(Clone, Subcommand)]
enum Action {
// Compress video
Encode {
#[arg(short, long, default_value_t = 400)]
max_block_size: usize,
#[arg(short, long, default_value_t = 10)]
iters: usize,
#[arg(short, long, default_value_t = 5_000)]
threshold: u32,
},
// Decompress video
Decode {
#[arg(short, long)]
debug: bool,
},
}
fn main() {
let args = Args::parse();
let size = P2 {
x: args.width as i32,
y: args.height as i32,
};
match args.action {
Action::Decode { debug } => {
let mut frame = Frame::new(size);
let mut last_frame = Frame::new(size);
let mut debug_frame = if debug { Some(Frame::new(size)) } else { None };
let mut stdin = BufReader::new(stdin());
let mut stdout = BufWriter::new(stdout());
loop {
let mut buf = vec![];
read_huffman(&mut stdin, &mut buf).unwrap();
eprintln!("{:?}", &buf[..20]);
let b = {
let mut buf = std::io::Cursor::new(&mut buf);
Block::read(&mut buf, View::all(size)).unwrap()
};
decode(&last_frame, &mut frame, View::all(size), &b);
if let Some(debug_frame) = &mut debug_frame {
debug_frame.pixels.copy_from_slice(&frame.pixels);
draw_debug(debug_frame, View::all(size), &b);
write_frame(&mut stdout, &debug_frame);
} else {
write_frame(&mut stdout, &frame);
}
last_frame.pixels.copy_from_slice(&frame.pixels); // TODO use mem::swap
frame.pixels.iter_mut().for_each(|e| *e = Pixel::BLACK);
}
}
Action::Encode {
max_block_size,
threshold,
iters,
} => {
let config = EncodeConfig {
threshold,
max_block_size,
iters,
};
let mut last_frame = Frame::new(size);
let mut stdin = BufReader::new(stdin());
let mut stdout = BufWriter::new(stdout());
for frame_number in 0.. {
let mut frame = read_frame(&mut stdin, size);
let t = Instant::now();
let b: Block = encode(&last_frame, &frame, View::all(size), &config);
let time_encode = t.elapsed();
let t = Instant::now();
decode(&last_frame, &mut frame, View::all(size), &b);
last_frame = frame;
let time_decode = t.elapsed();
let mut buf = vec![];
let mut bufw = std::io::Cursor::new(&mut buf);
b.write(&mut bufw).unwrap();
drop(bufw);
let t = Instant::now();
let bits_raw = buf.len() * 8;
// eprintln!("{:?}", &buf[..20]);
let bits_huff = write_huffman(&buf, &mut stdout).unwrap();
let time_huff = t.elapsed();
drop(buf);
eprintln!(
"frame {frame_number}: {:?}",
time_decode + time_huff + time_encode
);
eprintln!("\tencode {time_encode:?}");
eprintln!("\tdecode {time_decode:?}");
eprintln!(
"\thuff {time_huff:?} ({}%)",
((bits_huff as f32 / bits_raw as f32) * 100.0).round()
);
}
}
}
}
fn read_frame(inp: &mut impl Read, size: P2) -> Frame {
let mut f = Frame::new(size);
for y in 0..size.y {
for x in 0..size.x {
let mut cc = [0u8; 3];
inp.read_exact(&mut cc).unwrap();
f[P2 { x, y }] = Pixel {
r: cc[0] as PixelValue,
g: cc[1] as PixelValue,
b: cc[2] as PixelValue,
};
}
}
f
}
fn write_frame(out: &mut impl Write, frame: &Frame) {
for y in 0..frame.size.y {
for x in 0..frame.size.x {
let p = frame[P2 { x, y }];
let mut cc = [0u8; 3];
cc[0] = p.r.clamp(0, 255) as u8;
cc[1] = p.g.clamp(0, 255) as u8;
cc[2] = p.b.clamp(0, 255) as u8;
out.write_all(&mut cc).unwrap();
}
}
}
|
