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author | 2025-03-09 17:47:56 +0100 | |
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committer | 2025-03-10 01:59:49 +0100 | |
commit | 3ac1ee16f377d31a0fb80c8dae28b6239ac4229e (patch) | |
tree | f61faa581feaaeaba2542b9f2b8234a590684413 /vendor/codeberg.org/superseriousbusiness/exif-terminator/jpeg.go | |
parent | [chore] update URLs to forked source (diff) | |
download | gotosocial-3ac1ee16f377d31a0fb80c8dae28b6239ac4229e.tar.xz |
[chore] remove vendor
Diffstat (limited to 'vendor/codeberg.org/superseriousbusiness/exif-terminator/jpeg.go')
-rw-r--r-- | vendor/codeberg.org/superseriousbusiness/exif-terminator/jpeg.go | 132 |
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 -} |