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kimgio: add rarely used jpeg header

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Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
This commit is contained in:
Ivailo Monev 2023-08-15 22:54:58 +03:00
parent 8b9b1703aa
commit 2efb42147b
1 changed files with 4 additions and 1 deletions
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5
kimgio/jpg.cpp
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@ -36,10 +36,12 @@ static const TJSAMP s_jpegsubsampling = TJSAMP_444;
static const int s_jpegflags = TJFLAG_FASTDCT;
// for reference:
// https://en.wikipedia.org/wiki/List_of_file_signatures
// https://dev.exiv2.org/projects/exiv2/wiki/The_Metadata_in_JPEG_files
static const uchar s_jpgjfifheader[] = { 0xFF, 0xD8, 0xFF, 0xE0, 0x00, 0x10, 0x4A, 0x46, 0x49, 0x46, 0x00, 0x01 };
static const uchar s_jpgheader[] = { 0xFF, 0xD8, 0xFF, 0xE0 };
static const uchar s_jpg2header[] = { 0xFF, 0xD8, 0xFF, 0xEE };
static const uchar s_jpegexifheader[] = { 0xFF, 0xD8, 0xFF, 0xE1 };
static const uchar s_jpegapp1header[] = { 0xFF, 0xD8, 0xFF, 0xED };
static const struct HeadersTblData {
const uchar *header;
@ -48,7 +50,8 @@ static const struct HeadersTblData {
{ s_jpgjfifheader, 12 },
{ s_jpgheader, 4 },
{ s_jpg2header, 4 },
{ s_jpegexifheader, 4 }
{ s_jpegexifheader, 4 },
{ s_jpegapp1header, 4 }
};
static const qint16 HeadersTblSize = sizeof(HeadersTbl) / sizeof(HeadersTblData);