Big batch of renames: strip qoi prefix everywhere

bench/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "qoi-bench"
+version = "0.1.0"
+edition = "2018"
+license = "MIT/Apache-2.0"
+authors = ["Ivan Smirnov <rust@ivan.smirnov.ie>"]
+publish = false
+
+[dependencies]
+# internal
+qoi-fast = { path = ".." }
+# external
+anyhow = "1.0"
+libc = "0.2"
+png = "0.17"
+structopt = "0.3"
+walkdir = "2.3"
+
+[build-dependencies]
+cc = "1.0"

bench/build.rs

@@ -0,0 +1,18 @@
+use std::env;
+use std::fs;
+use std::path::PathBuf;
+
+fn main() {
+    let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
+    let out_src = out_dir.join("qoi.c");
+    fs::write(&out_src, "#include \"qoi.h\"\n").unwrap();
+
+    cc::Build::new()
+        .file(&out_src)
+        .include("../ext/qoi")
+        .define("QOI_NO_STDIO", None)
+        .define("QOI_IMPLEMENTATION", None)
+        .flag("-Wno-unsequenced")
+        .opt_level(3)
+        .compile("qoi");
+}

bench/src/main.rs

@@ -0,0 +1,413 @@
+use std::cmp::Ordering;
+use std::fs::{self, File};
+use std::path::{Path, PathBuf};
+use std::ptr;
+use std::time::{Duration, Instant};
+
+use anyhow::{bail, ensure, Context, Result};
+use libc::{c_int, c_void};
+use structopt::StructOpt;
+use walkdir::{DirEntry, WalkDir};
+
+#[derive(Debug, Copy, Clone, Default)]
+#[repr(C)]
+#[allow(non_camel_case_types)]
+struct qoi_desc {
+    width: u32,
+    height: u32,
+    channels: u8,
+    colorspace: u8,
+}
+
+extern "C" {
+    fn qoi_encode(data: *const c_void, desc: *const qoi_desc, out_len: *mut c_int) -> *mut c_void;
+    fn qoi_decode(
+        data: *const c_void, size: c_int, desc: *mut qoi_desc, channels: c_int,
+    ) -> *mut c_void;
+}
+
+fn black_box<T>(dummy: T) -> T {
+    unsafe {
+        let ret = core::ptr::read_volatile(&dummy);
+        core::mem::forget(dummy);
+        ret
+    }
+}
+
+fn timeit<T>(func: impl Fn() -> T) -> (T, Duration) {
+    let t0 = Instant::now();
+    let out = func();
+    let t1 = Instant::now();
+    (black_box(out), t1 - t0)
+}
+
+fn mean(v: &[f64]) -> f64 {
+    v.iter().sum::<f64>() / v.len() as f64
+}
+
+fn find_pngs(paths: &[PathBuf]) -> Result<Vec<PathBuf>> {
+    let is_png_file = |path: &PathBuf| {
+        path.is_file()
+            && path.extension().unwrap_or_default().to_string_lossy().to_ascii_lowercase() == "png"
+    };
+
+    let mut out = vec![];
+    for path in paths {
+        if is_png_file(path) {
+            out.push(path.clone());
+        } else if path.is_dir() {
+            out.extend(
+                WalkDir::new(path)
+                    .follow_links(true)
+                    .into_iter()
+                    .filter_map(Result::ok)
+                    .map(DirEntry::into_path)
+                    .filter(is_png_file),
+            )
+        } else {
+            bail!("path doesn't exist: {}", path.to_string_lossy());
+        }
+    }
+    out.sort_unstable();
+    Ok(out)
+}
+
+#[derive(Clone)]
+struct Image {
+    pub width: u32,
+    pub height: u32,
+    pub channels: u8,
+    pub data: Vec<u8>,
+}
+
+impl Image {
+    pub const fn n_pixels(&self) -> usize {
+        (self.width as usize) * (self.height as usize)
+    }
+}
+
+fn read_png(filename: &Path) -> Result<Image> {
+    let decoder = png::Decoder::new(File::open(filename)?);
+    let mut reader = decoder.read_info()?;
+    let mut buf = vec![0; reader.output_buffer_size()];
+    let info = reader.next_frame(&mut buf)?;
+    let bytes = &buf[..info.buffer_size()];
+    let channels = info.color_type.samples() as u8;
+    ensure!(channels == 3 || channels == 4, "invalid channels: {}", channels);
+    Ok(Image { width: info.width, height: info.height, channels, data: bytes.to_vec() })
+}
+
+trait Codec {
+    fn name() -> &'static str;
+
+    fn encode(img: &Image) -> Result<Vec<u8>>;
+
+    fn encode_bench(img: &Image) -> Result<()> {
+        let _ = black_box(Self::encode(img)?);
+        Ok(())
+    }
+
+    fn decode(data: &[u8], img: &Image) -> Result<Vec<u8>>;
+
+    fn decode_bench(data: &[u8], img: &Image) -> Result<()> {
+        let _ = black_box(Self::decode(data, img)?);
+        Ok(())
+    }
+}
+
+struct CodecQoiFast;
+
+impl Codec for CodecQoiFast {
+    fn name() -> &'static str {
+        "qoi-fast"
+    }
+
+    fn encode(img: &Image) -> Result<Vec<u8>> {
+        Ok(qoi_fast::encode_to_vec(&img.data, img.width, img.height)?)
+    }
+
+    fn decode(data: &[u8], _img: &Image) -> Result<Vec<u8>> {
+        Ok(qoi_fast::decode_to_vec(data)?.1)
+    }
+}
+
+struct CodecQoiC;
+
+impl CodecQoiC {
+    unsafe fn qoi_encode(img: &Image) -> Result<(*mut u8, usize)> {
+        let desc = qoi_desc {
+            width: img.width,
+            height: img.height,
+            channels: img.channels,
+            colorspace: 0,
+        };
+        let mut out_len: c_int = 0;
+        let ptr =
+            qoi_encode(img.data.as_ptr() as *const _, &desc as *const _, &mut out_len as *mut _);
+        ensure!(!ptr.is_null(), "error encoding with qoi-c");
+        Ok((ptr as _, out_len as _))
+    }
+
+    unsafe fn qoi_decode(data: &[u8], img: &Image) -> Result<(*mut u8, qoi_desc)> {
+        let mut desc = qoi_desc::default();
+        let ptr =
+            qoi_decode(data.as_ptr() as _, data.len() as _, &mut desc as *mut _, img.channels as _);
+        ensure!(!ptr.is_null(), "error decoding with qoi-c");
+        Ok((ptr as _, desc))
+    }
+}
+
+impl Codec for CodecQoiC {
+    fn name() -> &'static str {
+        "qoi-c"
+    }
+
+    fn encode(img: &Image) -> Result<Vec<u8>> {
+        unsafe {
+            let (ptr, len) = Self::qoi_encode(img)?;
+            let mut vec = vec![0; len];
+            ptr::copy_nonoverlapping(ptr, vec.as_mut_ptr(), len);
+            libc::free(ptr as _);
+            Ok(vec)
+        }
+    }
+
+    fn encode_bench(img: &Image) -> Result<()> {
+        unsafe {
+            let (ptr, _) = Self::qoi_encode(img)?;
+            libc::free(ptr as _);
+            Ok(())
+        }
+    }
+
+    fn decode(data: &[u8], img: &Image) -> Result<Vec<u8>> {
+        unsafe {
+            let (ptr, desc) = Self::qoi_decode(data, img)?;
+            let len = desc.width as usize * desc.height as usize * desc.channels as usize;
+            let mut vec = vec![0; len];
+            ptr::copy_nonoverlapping(ptr, vec.as_mut_ptr(), len);
+            libc::free(ptr as _);
+            Ok(vec)
+        }
+    }
+
+    fn decode_bench(data: &[u8], img: &Image) -> Result<()> {
+        unsafe {
+            let (ptr, _) = Self::qoi_decode(data, img)?;
+            libc::free(ptr as _);
+            Ok(())
+        }
+    }
+}
+
+#[derive(Clone)]
+struct BenchResult {
+    pub codec: String,
+    pub decode_sec: Vec<f64>,
+    pub encode_sec: Vec<f64>,
+}
+
+impl BenchResult {
+    pub fn new(codec: impl AsRef<str>, mut decode_sec: Vec<f64>, mut encode_sec: Vec<f64>) -> Self {
+        decode_sec.sort_by(|a, b| a.partial_cmp(b).unwrap_or(Ordering::Equal));
+        encode_sec.sort_by(|a, b| a.partial_cmp(b).unwrap_or(Ordering::Equal));
+        let codec = codec.as_ref().into();
+        Self { codec, decode_sec, encode_sec }
+    }
+
+    pub fn average_decode_sec(&self, use_median: bool) -> f64 {
+        if use_median {
+            self.decode_sec[self.decode_sec.len() / 2]
+        } else {
+            mean(&self.decode_sec)
+        }
+    }
+
+    pub fn average_encode_sec(&self, use_median: bool) -> f64 {
+        if use_median {
+            self.encode_sec[self.encode_sec.len() / 2]
+        } else {
+            mean(&self.encode_sec)
+        }
+    }
+}
+
+#[derive(Clone)]
+struct ImageBench {
+    results: Vec<BenchResult>,
+    n_pixels: usize,
+}
+
+impl ImageBench {
+    pub fn new(img: &Image) -> Self {
+        Self { results: vec![], n_pixels: img.n_pixels() }
+    }
+
+    pub fn run<C: Codec>(&mut self, img: &Image, sec_allowed: f64) -> Result<()> {
+        let (encoded, t_encode) = timeit(|| C::encode(img));
+        let encoded = encoded?;
+        let (decoded, t_decode) = timeit(|| C::decode(&encoded, img));
+        let decoded = decoded?;
+        let roundtrip = decoded.as_slice() == img.data.as_slice();
+        if C::name() == "qoi-fast" {
+            assert!(roundtrip, "{}: decoded data doesn't roundtrip", C::name());
+        } else {
+            ensure!(roundtrip, "{}: decoded data doesn't roundtrip", C::name());
+        }
+
+        let n_encode = (sec_allowed / 2. / t_encode.as_secs_f64()).max(2.).ceil() as usize;
+        let mut encode_tm = Vec::with_capacity(n_encode);
+        for _ in 0..n_encode {
+            encode_tm.push(timeit(|| C::encode_bench(img)).1);
+        }
+        let encode_sec = encode_tm.iter().map(Duration::as_secs_f64).collect();
+
+        let n_decode = (sec_allowed / 2. / t_decode.as_secs_f64()).max(2.).ceil() as usize;
+        let mut decode_tm = Vec::with_capacity(n_decode);
+        for _ in 0..n_decode {
+            decode_tm.push(timeit(|| C::decode_bench(&encoded, img)).1);
+        }
+        let decode_sec = decode_tm.iter().map(Duration::as_secs_f64).collect();
+
+        self.results.push(BenchResult::new(C::name(), decode_sec, encode_sec));
+        Ok(())
+    }
+
+    pub fn report(&self, use_median: bool) {
+        let (w_name, w_col) = (11, 13);
+        print!("{:<w$}", "codec", w = w_name);
+        print!("{:>w$}", "decode:ms", w = w_col);
+        print!("{:>w$}", "encode:ms", w = w_col);
+        print!("{:>w$}", "decode:mp/s", w = w_col);
+        print!("{:>w$}", "encode:mp/s", w = w_col);
+        println!();
+        for r in &self.results {
+            let decode_sec = r.average_decode_sec(use_median);
+            let encode_sec = r.average_encode_sec(use_median);
+            let mpixels = self.n_pixels as f64 / 1e6;
+            let (decode_mpps, encode_mpps) = (mpixels / decode_sec, mpixels / encode_sec);
+
+            print!("{:<w$}", r.codec, w = w_name);
+            print!("{:>w$.2}", decode_sec * 1e3, w = w_col);
+            print!("{:>w$.2}", encode_sec * 1e3, w = w_col);
+            print!("{:>w$.1}", decode_mpps, w = w_col);
+            print!("{:>w$.1}", encode_mpps, w = w_col);
+            println!();
+        }
+    }
+}
+
+#[derive(Default)]
+struct BenchTotals {
+    results: Vec<ImageBench>,
+}
+
+impl BenchTotals {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    pub fn update(&mut self, b: &ImageBench) {
+        self.results.push(b.clone())
+    }
+
+    pub fn report(&self, use_median: bool) {
+        if self.results.is_empty() {
+            return;
+        }
+        let codec_names: Vec<_> = self.results[0].results.iter().map(|r| r.codec.clone()).collect();
+        let n_codecs = codec_names.len();
+        let (mut total_decode_sec, mut total_encode_sec, mut total_size) =
+            (vec![0.; n_codecs], vec![0.; n_codecs], 0);
+        for r in &self.results {
+            total_size += r.n_pixels;
+            for i in 0..n_codecs {
+                // sum of medians is not the median of sums, but w/e, good enough here
+                total_decode_sec[i] += r.results[i].average_decode_sec(use_median);
+                total_encode_sec[i] += r.results[i].average_encode_sec(use_median);
+            }
+        }
+
+        let (w_name, w_col) = (11, 13);
+        println!("---");
+        println!(
+            "Overall results: ({} images, {:.1} MB):",
+            self.results.len(),
+            total_size as f64 / 1024. / 1024.
+        );
+        println!("---");
+        print!("{:<w$}", "codec", w = w_name);
+        print!("{:>w$}", "decode:ms", w = w_col);
+        print!("{:>w$}", "encode:ms", w = w_col);
+        print!("{:>w$}", "decode:mp/s", w = w_col);
+        print!("{:>w$}", "encode:mp/s", w = w_col);
+        println!();
+        for (i, codec_name) in codec_names.iter().enumerate() {
+            let decode_sec = total_decode_sec[i];
+            let encode_sec = total_encode_sec[i];
+            let mpixels = total_size as f64 / 1e6;
+            let (decode_mpps, encode_mpps) = (mpixels / decode_sec, mpixels / encode_sec);
+
+            print!("{:<w$}", codec_name, w = w_name);
+            print!("{:>w$.2}", decode_sec * 1e3, w = w_col);
+            print!("{:>w$.2}", encode_sec * 1e3, w = w_col);
+            print!("{:>w$.1}", decode_mpps, w = w_col);
+            print!("{:>w$.1}", encode_mpps, w = w_col);
+            println!();
+        }
+    }
+}
+
+fn bench_png(filename: &Path, seconds: f64, use_median: bool) -> Result<ImageBench> {
+    let f = filename.to_string_lossy();
+    let img = read_png(filename).context(format!("error reading PNG file: {}", f))?;
+    let size_kb = fs::metadata(filename)?.len() / 1024;
+    let mpixels = img.n_pixels() as f64 / 1e6;
+    println!(
+        "{} ({}x{}:{}, {} KB, {:.1}MP)",
+        f, img.width, img.height, img.channels, size_kb, mpixels
+    );
+    let mut bench = ImageBench::new(&img);
+    bench.run::<CodecQoiC>(&img, seconds)?;
+    bench.run::<CodecQoiFast>(&img, seconds)?;
+    bench.report(use_median);
+    Ok(bench)
+}
+
+fn bench_suite(files: &[PathBuf], seconds: f64, use_median: bool) -> Result<()> {
+    let mut totals = BenchTotals::new();
+    for file in files {
+        match bench_png(file, seconds, use_median) {
+            Ok(res) => totals.update(&res),
+            Err(err) => {
+                eprintln!("Error processing `{}`: {}", file.display(), err);
+            }
+        }
+    }
+    if totals.results.len() > 1 {
+        totals.report(use_median);
+    }
+    Ok(())
+}
+
+#[derive(Debug, StructOpt)]
+struct Args {
+    /// Files or directories containing png images.
+    #[structopt(parse(from_os_str))]
+    paths: Vec<PathBuf>,
+    /// Number of seconds allocated for each image/codec.
+    #[structopt(short, long, default_value = "1")]
+    seconds: f64,
+    /// Use average (mean) instead of the median.
+    #[structopt(short, long)]
+    average: bool,
+}
+
+fn main() -> Result<()> {
+    let args = <Args as StructOpt>::from_args();
+    ensure!(!args.paths.is_empty(), "no input paths given");
+    let files = find_pngs(&args.paths)?;
+    ensure!(!files.is_empty(), "no PNG files found in given paths");
+    bench_suite(&files, args.seconds, !args.average)?;
+    Ok(())
+}

bench/src/qoi.c

@@ -0,0 +1 @@
+#include "qoi.h"