avif

.gitignore

@@ -2,3 +2,4 @@ bin
 example.*
 test.*
 *.exe
+ffwebp

cmd/ffwebp/main.go

@@ -80,7 +80,7 @@ func main() {
 	}
 
 	if err := app.Run(context.Background(), os.Args); err != nil {
-		logx.Errorf("fatal: %v", err)
+		logx.Errorf("fatal: %v\n", err)
 	}
 }
 
@@ -112,6 +112,13 @@ func run(_ context.Context, cmd *cli.Command) error {
 		logx.Printf("reading input from <stdin>\n")
 	}
 
+	sniffed, reader, err := codec.Sniff(reader)
+	if err != nil {
+		return err
+	}
+
+	logx.Printf("sniffed codec: %s (%q)\n", sniffed.Codec, sniffed)
+
 	if output = cmd.String("output"); output != "-" {
 		logx.Printf("opening output file %q\n", filepath.ToSlash(output))
 
@@ -132,13 +139,6 @@ func run(_ context.Context, cmd *cli.Command) error {
 
 	common.FillDefaults()
 
-	sniffed, reader, err := codec.Sniff(reader)
-	if err != nil {
-		return err
-	}
-
-	logx.Printf("sniffed codec: %s (%q)\n", sniffed.Codec, sniffed)
-
 	oCodec, err := codec.Detect(output, cmd.String("codec"))
 	if err != nil {
 		return err

go.mod

@@ -5,6 +5,7 @@ go 1.24.2
 require github.com/urfave/cli/v3 v3.3.8
 
 require (
+	github.com/gen2brain/avif v0.4.4
 	github.com/gen2brain/webp v0.5.5
 	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
 	golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8

go.sum

@@ -2,6 +2,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/ebitengine/purego v0.8.3 h1:K+0AjQp63JEZTEMZiwsI9g0+hAMNohwUOtY0RPGexmc=
 github.com/ebitengine/purego v0.8.3/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
+github.com/gen2brain/avif v0.4.4 h1:Ga/ss7qcWWQm2bxFpnjYjhJsNfZrWs5RsyklgFjKRSE=
+github.com/gen2brain/avif v0.4.4/go.mod h1:/XCaJcjZraQwKVhpu9aEd9aLOssYOawLvhMBtmHVGqk=
 github.com/gen2brain/webp v0.5.5 h1:MvQR75yIPU/9nSqYT5h13k4URaJK3gf9tgz/ksRbyEg=
 github.com/gen2brain/webp v0.5.5/go.mod h1:xOSMzp4aROt2KFW++9qcK/RBTOVC2S9tJG66ip/9Oc0=
 github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 h1:zYyBkD/k9seD2A7fsi6Oo2LfFZAehjjQMERAvZLEDnQ=

internal/builtins/avif.go

@@ -0,0 +1,8 @@
+//go:build avif || core || full
+// +build avif core full
+
+package builtins
+
+import (
+	_ "github.com/coalaura/ffwebp/internal/codec/avif"
+)

internal/codec/avif/avif.go

@@ -0,0 +1,119 @@
+package avif
+
+import (
+	"bytes"
+	"fmt"
+	"image"
+	"io"
+
+	"github.com/gen2brain/avif"
+
+	"github.com/coalaura/ffwebp/internal/codec"
+	"github.com/coalaura/ffwebp/internal/logx"
+	"github.com/coalaura/ffwebp/internal/opts"
+	"github.com/urfave/cli/v3"
+)
+
+var (
+	quality  int
+	qualityA int
+	speed    int
+	chroma   int
+)
+
+func init() {
+	codec.Register(impl{})
+}
+
+type impl struct{}
+
+func (impl) String() string {
+	return "avif"
+}
+
+func (impl) Extensions() []string {
+	return []string{"avif"}
+}
+
+func (impl) Flags(flags []cli.Flag) []cli.Flag {
+	return append(flags,
+		&cli.IntFlag{
+			Name:        "avif.quality-alpha",
+			Usage:       "AVIF: alpha channel quality in range [0-100]",
+			Value:       60,
+			Destination: &qualityA,
+			Validator: func(v int) error {
+				if v < 0 || v > 100 {
+					return fmt.Errorf("invalid avif.quality-alpha: %d", v)
+				}
+				return nil
+			},
+		},
+		&cli.IntFlag{
+			Name:        "avif.speed",
+			Usage:       "AVIF: encoding speed in range [0-10] (0=slowest/best)",
+			Value:       6,
+			Destination: &speed,
+			Validator: func(v int) error {
+				if v < 0 || v > 10 {
+					return fmt.Errorf("invalid avif.speed: %d", v)
+				}
+				return nil
+			},
+		},
+		&cli.IntFlag{
+			Name:        "avif.chroma",
+			Usage:       "AVIF: chroma subsampling (444=best, 422, 420=smallest)",
+			Value:       444,
+			Destination: &chroma,
+			Validator: func(v int) error {
+				if v != 444 && v != 422 && v != 420 {
+					return fmt.Errorf("invalid avif.chroma: %d", v)
+				}
+				return nil
+			},
+		},
+	)
+}
+
+func (impl) Sniff(reader io.ReaderAt) (int, []byte, error) {
+	buf := make([]byte, 12)
+
+	if _, err := reader.ReadAt(buf, 0); err != nil {
+		return 0, nil, err
+	}
+
+	if bytes.Equal(buf[4:12], []byte("ftypavif")) {
+		return 100, buf[:12], nil
+	}
+
+	return 0, nil, nil
+}
+
+func (impl) Decode(reader io.Reader) (image.Image, error) {
+	return avif.Decode(reader)
+}
+
+func (impl) Encode(writer io.Writer, img image.Image, options opts.Common) error {
+	logx.Printf("avif: quality=%d, quality-alpha=%d, speed=%d, chroma=%d\n", options.Quality, qualityA, speed, chroma)
+
+	return avif.Encode(writer, img, avif.Options{
+		Quality:           options.Quality,
+		QualityAlpha:      qualityA,
+		Speed:             speed,
+		ChromaSubsampling: chromaSubsampling(chroma),
+	})
+}
+
+func chromaSubsampling(c int) image.YCbCrSubsampleRatio {
+	switch c {
+	case 444:
+		return image.YCbCrSubsampleRatio444
+	case 422:
+		return image.YCbCrSubsampleRatio422
+	case 420:
+		return image.YCbCrSubsampleRatio420
+	default:
+		return image.YCbCrSubsampleRatio444
+	}
+}

internal/codec/detect.go

@@ -61,7 +61,7 @@ func Sniff(reader io.Reader) (*Sniffed, io.Reader, error) {
 	}
 
 	if guess == nil {
-		return nil, nil, errors.New("unknown format")
+		return nil, nil, errors.New("unknown input format")
 	}
 
 	return &Sniffed{

run.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+echo "Rebuilding..."
+go build -tags full -o ffwebp ./cmd/ffwebp
+
+chmod +x ffwebp
+
+./ffwebp $*