105 lines
2.1 KiB
Go
105 lines
2.1 KiB
Go
package main
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import (
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"fmt"
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"image"
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_ "image/jpeg"
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_ "image/png"
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"io"
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"os"
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"github.com/Kagami/go-avif"
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"github.com/docopt/docopt-go"
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)
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const VERSION = "0.0.0"
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const USAGE = `
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Usage: avif [options] -e src_filename -o dst_filename
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AVIF encoder
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Options:
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-h, --help Give this help
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-V, --version Display version number
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-e <src>, --encode=<src> Source filename
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-o <dst>, --output=<dst> Destination filename
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-q <qp>, --quality=<qp> Compression level (0..63), [default: 25]
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-s <spd>, --speed=<spd> Compression speed (0..8), [default: 4]
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--lossless Lossless compression (alias for -q 0)
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--best Slowest compression method (alias for -s 0)
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--fast Fastest compression method (alias for -s 8)
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`
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type config struct {
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Encode string
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Output string
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Quality int
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Speed int
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Lossless bool
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Best bool
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Fast bool
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}
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func checkErr(err error) {
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if err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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}
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func check(cond bool, errStr string) {
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if !cond {
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fmt.Println(errStr)
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os.Exit(1)
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}
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}
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func main() {
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var conf config
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opts, err := docopt.ParseArgs(USAGE, nil, VERSION)
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checkErr(err)
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err = opts.Bind(&conf)
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checkErr(err)
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check(conf.Quality >= avif.MinQuality && conf.Quality <= avif.MaxQuality, "bad quality (0..63)")
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check(conf.Speed >= avif.MinSpeed && conf.Speed <= avif.MaxSpeed, "bad speed (0..8)")
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check(!conf.Best || !conf.Fast, "can't use both --best and --fast")
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if conf.Lossless {
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conf.Quality = 0
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}
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if conf.Best {
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conf.Speed = 0
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} else if conf.Fast {
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conf.Speed = 8
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}
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avifOpts := avif.Options{
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Speed: conf.Speed,
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Quality: conf.Quality,
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}
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var src io.Reader
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var dst io.Writer
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if conf.Encode == "-" {
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src = os.Stdin
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} else {
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file, err := os.Open(conf.Encode)
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checkErr(err)
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defer file.Close()
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src = file
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}
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if conf.Output == "-" {
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dst = os.Stdout
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} else {
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file, err := os.Create(conf.Output)
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checkErr(err)
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defer file.Close()
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dst = file
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}
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// TODO(Kagami): Accept y4m.
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img, _, err := image.Decode(src)
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checkErr(err)
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err = avif.Encode(dst, img, &avifOpts)
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checkErr(err)
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}
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