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Diffstat (limited to 'vendor/codeberg.org/superseriousbusiness/exif-terminator/jpeg.go')
-rw-r--r--vendor/codeberg.org/superseriousbusiness/exif-terminator/jpeg.go132
1 files changed, 0 insertions, 132 deletions
diff --git a/vendor/codeberg.org/superseriousbusiness/exif-terminator/jpeg.go b/vendor/codeberg.org/superseriousbusiness/exif-terminator/jpeg.go
deleted file mode 100644
index 01ca313ca..000000000
--- a/vendor/codeberg.org/superseriousbusiness/exif-terminator/jpeg.go
+++ /dev/null
@@ -1,132 +0,0 @@
-/*
- exif-terminator
- Copyright (C) 2022 SuperSeriousBusiness admin@gotosocial.org
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU Affero General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Affero General Public License for more details.
-
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-package terminator
-
-import (
- "encoding/binary"
- "fmt"
- "io"
-
- jpegstructure "github.com/superseriousbusiness/go-jpeg-image-structure/v2"
-)
-
-var markerLen = map[byte]int{
- 0x00: 0,
- 0x01: 0,
- 0xd0: 0,
- 0xd1: 0,
- 0xd2: 0,
- 0xd3: 0,
- 0xd4: 0,
- 0xd5: 0,
- 0xd6: 0,
- 0xd7: 0,
- 0xd8: 0,
- 0xd9: 0,
- 0xda: 0,
-
- // J2C
- 0x30: 0,
- 0x31: 0,
- 0x32: 0,
- 0x33: 0,
- 0x34: 0,
- 0x35: 0,
- 0x36: 0,
- 0x37: 0,
- 0x38: 0,
- 0x39: 0,
- 0x3a: 0,
- 0x3b: 0,
- 0x3c: 0,
- 0x3d: 0,
- 0x3e: 0,
- 0x3f: 0,
- 0x4f: 0,
- 0x92: 0,
- 0x93: 0,
-
- // J2C extensions
- 0x74: 4,
- 0x75: 4,
- 0x77: 4,
-}
-
-type jpegVisitor struct {
- js *jpegstructure.JpegSplitter
- writer io.Writer
-}
-
-// HandleSegment satisfies the visitor interface{} of the jpegstructure library.
-//
-// We don't really care about many of the parameters, since all we're interested
-// in here is the very last segment that was scanned.
-func (v *jpegVisitor) HandleSegment(segmentMarker byte, _ string, _ int, _ bool) error {
- segmentList := v.js.Segments()
- segments := segmentList.Segments()
- mostRecentSegment := segments[len(segments)-1]
- return v.writeSegment(mostRecentSegment)
-}
-
-func (v *jpegVisitor) writeSegment(s *jpegstructure.Segment) error {
- w := v.writer
-
- defer func() {
- // whatever happens, when we finished then evict data from the segment;
- // once we've written it we don't want it in memory anymore
- s.Data = nil
- }()
-
- if s.IsExif() {
- // Segment contains exif data, terminate!
- if err := terminateEXIF(s); err != nil {
- return err
- }
- }
-
- // The scan-data will have a marker-ID of (0) because it doesn't have a marker-ID or length.
- if s.MarkerId != 0 {
- _, err := w.Write([]byte{0xff, s.MarkerId})
- if err != nil {
- return err
- }
-
- sizeLen, found := markerLen[s.MarkerId]
- if !found || sizeLen == 2 {
- l := uint16(len(s.Data) + 2)
- b := make([]byte, 2)
- binary.BigEndian.PutUint16(b, l)
- if _, err := w.Write(b); err != nil {
- return err
- }
- } else if sizeLen == 4 {
- l := uint32(len(s.Data) + 4)
- b := make([]byte, 4)
- binary.BigEndian.PutUint32(b, l)
- if _, err := w.Write(b); err != nil {
- return err
- }
- } else if sizeLen != 0 {
- return fmt.Errorf("not a supported marker-size: MARKER-ID=(0x%02x) MARKER-SIZE-LEN=(%d)", s.MarkerId, sizeLen)
- }
- }
-
- _, err := w.Write(s.Data)
- return err
-}