67 lines
1.6 KiB
Rust
67 lines
1.6 KiB
Rust
//! This crate contains a JPEG decoder.
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//!
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//! # Examples
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//!
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//! ```
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//! use jpeg_decoder::Decoder;
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//! use std::fs::File;
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//! use std::io::BufReader;
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//!
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//! let file = File::open("tests/reftest/images/extraneous-data.jpg").expect("failed to open file");
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//! let mut decoder = Decoder::new(BufReader::new(file));
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//! let pixels = decoder.decode().expect("failed to decode image");
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//! let metadata = decoder.info().unwrap();
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//! ```
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//!
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//! Get metadata from a file without decoding it:
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//!
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//! ```
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//! use jpeg_decoder::Decoder;
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//! use std::fs::File;
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//! use std::io::BufReader;
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//!
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//! let file = File::open("tests/reftest/images/extraneous-data.jpg").expect("failed to open file");
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//! let mut decoder = Decoder::new(BufReader::new(file));
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//! decoder.read_info().expect("failed to read metadata");
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//! let metadata = decoder.info().unwrap();
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//! ```
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#![deny(missing_docs)]
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#![deny(unsafe_code)]
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#![cfg_attr(feature = "platform_independent", forbid(unsafe_code))]
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extern crate alloc;
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extern crate core;
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#[cfg(feature = "rayon")]
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extern crate rayon;
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pub use decoder::{ColorTransform, Decoder, ImageInfo, PixelFormat};
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pub use error::{Error, UnsupportedFeature};
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pub use parser::CodingProcess;
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use std::io;
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#[cfg(not(feature = "platform_independent"))]
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mod arch;
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mod decoder;
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mod error;
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mod huffman;
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mod idct;
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mod marker;
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mod parser;
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mod upsampler;
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mod worker;
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fn read_u8<R: io::Read>(reader: &mut R) -> io::Result<u8> {
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let mut buf = [0];
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reader.read_exact(&mut buf)?;
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Ok(buf[0])
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}
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fn read_u16_from_be<R: io::Read>(reader: &mut R) -> io::Result<u16> {
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let mut buf = [0, 0];
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reader.read_exact(&mut buf)?;
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Ok(u16::from_be_bytes(buf))
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}
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