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