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// Ogg decoder and encoder written in Rust
//
// Copyright (c) 2018 est31 <MTest31@outlook.com>
// and contributors. All rights reserved.
// Licensed under MIT license, or Apache 2 license,
// at your option. Please see the LICENSE file
// attached to this source distribution for details.
extern crate ogg;
use std::env;
use ogg::{PacketReader, Packet};
use std::fs::File;
fn main() {
match run() {
Ok(_) =>(),
Err(err) => println!("Error: {}", err),
}
}
#[allow(dead_code)]
fn print_u8_slice(arr :&[u8]) {
if arr.len() <= 4 {
for a in arr {
print!("0x{:02x} ", a);
}
println!();
return;
}
println!("[");
let mut i :usize = 0;
while i * 4 < arr.len() - 4 {
println!("\t0x{:02x}, 0x{:02x}, 0x{:02x}, 0x{:02x},",
arr[i * 4], arr[i * 4 + 1], arr[i * 4 + 2], arr[i * 4 + 3]);
i += 1;
}
match arr.len() as i64 - i as i64 * 4 {
1 => println!("\t0x{:02x}];", arr[i * 4]),
2 => println!("\t0x{:02x}, 0x{:02x}];", arr[i * 4], arr[i * 4 + 1]),
3 => println!("\t0x{:02x}, 0x{:02x}, 0x{:02x}];",
arr[i * 4], arr[i * 4 + 1], arr[i * 4 + 2]),
4 => println!("\t0x{:02x}, 0x{:02x}, 0x{:02x}, 0x{:02x}];",
arr[i * 4], arr[i * 4 + 1], arr[i * 4 + 2], arr[i * 4 + 3]),
de => panic!("impossible value {}", de),
}
}
fn dump_pck_info(p :&Packet, ctr :usize) {
println!("Packet: serial 0x{:08x}, data {:08} large, first {: >5}, last {: >5}, absgp 0x{:016x} nth {}",
p.stream_serial(), p.data.len(), p.first_in_page(), p.last_in_page(),
p.absgp_page(), ctr);
print_u8_slice(&p.data);
}
fn run() -> Result<(), std::io::Error> {
let file_path = env::args().nth(1).expect("No arg found. Please specify a file to open.");
println!("Opening file: {}", file_path);
let mut f = File::open(file_path)?;
let mut pck_rdr = PacketReader::new(&mut f);
let mut ctr = 0;
loop {
let r = pck_rdr.read_packet();
match r {
Ok(Some(p)) => {
dump_pck_info(&p, ctr);
// Why do we not check p.last_packet here, and break the loop if false?
// Well, first, this is only an example.
// Second, the codecs may end streams in the middle of the file,
// while still continuing other streams.
// Therefore, don't do a probably too-early break.
// Applications which know the codec may know after which
// ended stream to stop decoding the file and thus not
// encounter an error.
},
// End of stream
Ok(None) => break,
Err(e) => {
println!("Encountered Error: {:?}", e);
break;
}
}
ctr+=1;
}
Ok(())
}
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