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#![feature(box_patterns)]
use anyhow::Context;
use clap::Parser;
use evc::{
block::{Block, BlockInner},
codec::decode::decode_block,
frame::Frame,
header::Header,
pixel::Pixel,
ser::Source,
view::View,
};
use log::info;
use std::io::{BufReader, BufWriter};
#[derive(Parser)]
#[clap(about, version)]
pub struct DecodeArgs {
#[arg(long)]
debug: bool,
}
fn main() -> anyhow::Result<()> {
env_logger::init_from_env("LOG");
let args = DecodeArgs::parse();
let mut input = BufReader::new(std::io::stdin());
let mut output = BufWriter::new(std::io::stdout());
let header = input.get::<Header>().context("reading header")?;
info!("{header:?}");
let size = header.resolution;
let mut prev = Frame::new(size);
for i in 0.. {
info!("decode frame {i}");
let block = Block::read(&mut input, size).context("reading encoded frame")?;
let mut frame = Frame::new(size);
decode_block(&block, frame.view_mut(), prev.view());
if args.debug {
let mut f2 = frame.clone();
draw_debug(&block, f2.view_mut());
f2.write(&mut output).context("writing raw frame")?;
} else {
frame.write(&mut output).context("writing raw frame")?;
}
prev = frame;
}
drop(input);
Ok(())
}
fn draw_debug(block: &Block, mut target: View<&mut Frame>) {
match &block.inner {
BlockInner::Literal(_) => {
target.draw_box(Pixel::GREEN);
}
BlockInner::Split(box [a, b]) => {
let [at, bt] = target.split_mut_unsafe();
draw_debug(a, at);
draw_debug(b, bt);
}
BlockInner::Reference { translation: _ } => {
target.draw_box(Pixel::BLUE);
}
}
}
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