diff options
Diffstat (limited to 'recipes-core/file-magic-db-images/files/Magdir/jpeg')
| -rw-r--r-- | recipes-core/file-magic-db-images/files/Magdir/jpeg | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/recipes-core/file-magic-db-images/files/Magdir/jpeg b/recipes-core/file-magic-db-images/files/Magdir/jpeg new file mode 100644 index 0000000..e6a4ffa --- /dev/null +++ b/recipes-core/file-magic-db-images/files/Magdir/jpeg @@ -0,0 +1,119 @@ + +#------------------------------------------------------------------------------ +# $File: jpeg,v 1.28 2015/04/09 20:01:40 christos Exp $ +# JPEG images +# SunOS 5.5.1 had +# +# 0 string \377\330\377\340 JPEG file +# 0 string \377\330\377\356 JPG file +# +# both of which turn into "JPEG image data" here. +# +0 beshort 0xffd8 JPEG image data +!:mime image/jpeg +!:apple 8BIMJPEG +!:strength *3 +!:ext jpeg/jpg/jpe/jfif +>6 string JFIF \b, JFIF standard +# The following added by Erik Rossen <rossen@freesurf.ch> 1999-09-06 +# in a vain attempt to add image size reporting for JFIF. Note that these +# tests are not fool-proof since some perfectly valid JPEGs are currently +# impossible to specify in magic(4) format. +# First, a little JFIF version info: +>>11 byte x \b %d. +>>12 byte x \b%02d +# Next, the resolution or aspect ratio of the image: +>>13 byte 0 \b, aspect ratio +>>13 byte 1 \b, resolution (DPI) +>>13 byte 2 \b, resolution (DPCM) +>>14 beshort x \b, density %dx +>>16 beshort x \b%d +>>4 beshort x \b, segment length %d +# Next, show thumbnail info, if it exists: +>>18 byte !0 \b, thumbnail %dx +>>>19 byte x \b%d +>6 string Exif \b, Exif standard: [ +>>12 indirect/r x +>>12 string x \b] + +# Jump to the first segment +>(4.S+4) use jpeg_segment + +# This uses recursion... +0 name jpeg_segment +>0 beshort 0xFFFE +# Recursion handled by FFE0 +#>>(2.S+2) use jpeg_segment +>>2 pstring/HJ x \b, comment: "%s" + +>0 beshort 0xFFC0 +>>(2.S+2) use jpeg_segment +>>4 byte x \b, baseline, precision %d +>>7 beshort x \b, %dx +>>5 beshort x \b%d +>>9 byte x \b, frames %d + +>0 beshort 0xFFC1 +>>(2.S+2) use jpeg_segment +>>4 byte x \b, extended sequential, precision %d +>>7 beshort x \b, %dx +>>5 beshort x \b%d +>>9 byte x \b, frames %d + +>0 beshort 0xFFC2 +>>(2.S+2) use jpeg_segment +>>4 byte x \b, progressive, precision %d +>>7 beshort x \b, %dx +>>5 beshort x \b%d +>>9 byte x \b, frames %d + +# Define Huffman Tables +>0 beshort 0xFFC4 +>>(2.S+2) use jpeg_segment + +>0 beshort 0xFFE1 +# Recursion handled by FFE0 +#>>(2.S+2) use jpeg_segment +>>4 string Exif \b, Exif Standard: [ +>>>10 indirect/r x +>>>10 string x \b] + +# Application specific markers +>0 beshort&0xFFE0 =0xFFE0 +>>(2.S+2) use jpeg_segment + +# DB: Define Quantization tables +# DD: Define Restart interval [XXX: wrong here, it is 4 bytes] +# D8: Start of image +# D9: End of image +# Dn: Restart +>0 beshort&0xFFD0 =0xFFD0 +>>0 beshort&0xFFE0 !0xFFE0 +>>>(2.S+2) use jpeg_segment + +#>0 beshort x unknown 0x%x +#>>(2.S+2) use jpeg_segment + +# HSI is Handmade Software's proprietary JPEG encoding scheme +0 string hsi1 JPEG image data, HSI proprietary + +# From: David Santinoli <david@santinoli.com> +0 string \x00\x00\x00\x0C\x6A\x50\x20\x20\x0D\x0A\x87\x0A JPEG 2000 +# From: Johan van der Knijff <johan.vanderknijff@kb.nl> +# Added sub-entries for JP2, JPX, JPM and MJ2 formats; added mimetypes +# https://github.com/bitsgalore/jp2kMagic +# +# Now read value of 'Brand' field, which yields a few possibilities: +>20 string \x6a\x70\x32\x20 Part 1 (JP2) +!:mime image/jp2 +>20 string \x6a\x70\x78\x20 Part 2 (JPX) +!:mime image/jpx +>20 string \x6a\x70\x6d\x20 Part 6 (JPM) +!:mime image/jpm +>20 string \x6d\x6a\x70\x32 Part 3 (MJ2) +!:mime video/mj2 + +# Type: JPEG 2000 codesream +# From: Mathieu Malaterre <mathieu.malaterre@gmail.com> +0 belong 0xff4fff51 JPEG 2000 codestream +45 beshort 0xff52 |