Remove soreil/arw dependency

Signed-off-by: Igor Shishkin <me@teran.ru>

go.mod

@@ -3,7 +3,6 @@ module github.com/teran/imgsum
 go 1.13
 
 require (
-	github.com/soreil/arw v0.0.0-20180907190942-c71045f5319b
 	github.com/bamiaux/rez v0.0.0-20170731184118-29f4463c688b
 	github.com/brett-lempereur/ish v0.0.0-20161214150457-bbdc45bcf55d
 	github.com/gonum/blas v0.0.0-20181208220705-f22b278b28ac

go.sum

@@ -0,0 +1,18 @@
+github.com/bamiaux/rez v0.0.0-20170731184118-29f4463c688b h1:5Ci5wpOL75rYF6RQGRoqhEAU6xLJ6n/D4SckXX1yB74=
+github.com/bamiaux/rez v0.0.0-20170731184118-29f4463c688b/go.mod h1:obBQGGIFbbv9KWg92Qu9UHeD94JXmHD1jovY/z6I3O8=
+github.com/brett-lempereur/ish v0.0.0-20161214150457-bbdc45bcf55d h1:oCP9o9IOvgi0A1biE1EkI/m+pViqJoCQjU/bAopLpBo=
+github.com/brett-lempereur/ish v0.0.0-20161214150457-bbdc45bcf55d/go.mod h1:sGi2C1jLbZM77czzwYX70vIkYV8Smll6xG93m96IZYw=
+github.com/gonum/blas v0.0.0-20181208220705-f22b278b28ac/go.mod h1:P32wAyui1PQ58Oce/KYkOqQv8cVw1zAapXOl+dRFGbc=
+github.com/gonum/floats v0.0.0-20181209220543-c233463c7e82/go.mod h1:PxC8OnwL11+aosOB5+iEPoV3picfs8tUpkVd0pDo+Kg=
+github.com/gonum/internal v0.0.0-20181124074243-f884aa714029/go.mod h1:Pu4dmpkhSyOzRwuXkOgAvijx4o+4YMUJJo9OvPYMkks=
+github.com/gonum/lapack v0.0.0-20181123203213-e4cdc5a0bff9/go.mod h1:XA3DeT6rxh2EAE789SSiSJNqxPaC0aE9J8NTOI0Jo/A=
+github.com/gonum/matrix v0.0.0-20181209220409-c518dec07be9/go.mod h1:0EXg4mc1CNP0HCqCz+K4ts155PXIlUywf0wqN+GfPZw=
+github.com/gotk3/gotk3 v0.0.0-20190512183708-8365021fde1a/go.mod h1:Eew3QBwAOBTrfFFDmsDE5wZWbcagBL1NUslj1GhRveo=
+github.com/nf/cr2 v0.0.0-20180623103828-4699471a17ed h1:QP63yO3XEt8tJ1DgBsNjbOyBGjy2eHy9ITK4Eisr9rg=
+github.com/nf/cr2 v0.0.0-20180623103828-4699471a17ed/go.mod h1:HazDB3gS/i//QXMMRmTAV7Ni9gAi4mDNTH2HjZ5aVgU=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=
+github.com/steakknife/hamming v0.0.0-20180906055317-003c143a81c2 h1:o6NMd68tuqfQ0ZFnz2d16xzFNLWxrCvqF40InOJJHSM=
+github.com/steakknife/hamming v0.0.0-20180906055317-003c143a81c2/go.mod h1:hpGUWaI9xL8pRQCTXQgocU38Qw1g0Us7n5PxxTwTCYU=
+golang.org/x/image v0.0.0-20190516052701-61b8692d9a5c h1:VgWXv7ME0Tq2L5CBzVvhTMrfcKfvGs7ifTV9PBYTP3I=
+golang.org/x/image v0.0.0-20190516052701-61b8692d9a5c/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

image/image.go

@@ -1,21 +1,17 @@
 package image
 
 import (
-	"bytes"
 	"crypto/sha256"
 	"encoding/hex"
 	stdimage "image"
-	"image/jpeg"
 	"os"
 	"regexp"
 
 	"github.com/nf/cr2"
-	"github.com/soreil/arw"
 )
 
 var (
 	reCanon = regexp.MustCompile("(?i).cr(2)$")
-	reSony  = regexp.MustCompile("(?i).(arw|sr2)$")
 )
 
 // Image type
@@ -47,8 +43,6 @@ func (i *Image) open() error {
 
 	if reCanon.Match([]byte(i.filename)) {
 		err = i.openCanonRaw()
-	} else if reSony.Match([]byte(i.filename)) {
-		err = i.openSonyRaw()
 	} else {
 		err = i.openStdImage()
 	}
@@ -78,42 +72,6 @@ func (i *Image) openCanonRaw() error {
 	return nil
 }
 
-func (i *Image) openSonyRaw() error {
-	var jpegOffset uint32
-	var jpegLength uint32
-
-	header, err := arw.ParseHeader(i.fp)
-	if err != nil {
-		return err
-	}
-
-	meta, err := arw.ExtractMetaData(i.fp, int64(header.Offset), 0)
-	if err != nil {
-		return err
-	}
-
-	for i := range meta.FIA {
-		switch meta.FIA[i].Tag {
-		case arw.JPEGInterchangeFormat:
-			jpegOffset = meta.FIA[i].Offset
-		case arw.JPEGInterchangeFormatLength:
-			jpegLength = meta.FIA[i].Offset
-		}
-	}
-
-	jpg, err := arw.ExtractThumbnail(i.fp, jpegOffset, jpegLength)
-	if err != nil {
-		return err
-	}
-
-	reader := bytes.NewReader(jpg)
-	i.image, err = jpeg.Decode(reader)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
 // Hexdigest produces image hash and returns it as string
 // actually the string is SHA256 from the hasher's value
 func (i *Image) Hexdigest(hashKind HashType, res int) (string, error) {