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Diffstat (limited to 'contrib/file/Magdir/jpeg')
| -rw-r--r-- | contrib/file/Magdir/jpeg | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/contrib/file/Magdir/jpeg b/contrib/file/Magdir/jpeg deleted file mode 100644 index 089405a68872..000000000000 --- a/contrib/file/Magdir/jpeg +++ /dev/null @@ -1,61 +0,0 @@ - -#------------------------------------------------------------------------------ -# 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 ->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 X%d: ->16 beshort x \bY%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 -# Here things get sticky. We can do ONE MORE marker segment with -# indirect addressing, and that's all. It would be great if we could -# do pointer arithemetic like in an assembler language. Christos? -# And if there was some sort of looping construct to do searches, plus a few -# named accumulators, it would be even more effective... -# At least we can show a comment if no other segments got inserted before: ->(4.S+5) byte 0xFE ->>(4.S+8) string >\0 \b, "%s" -#>(4.S+5) byte 0xFE \b, comment -#>>(4.S+6) beshort x \b length=%d -#>>(4.S+8) string >\0 \b, "%s" -# Or, we can show the encoding type (I've included only the three most common) -# and image dimensions if we are lucky and the SOFn (image segment) is here: ->(4.S+5) byte 0xC0 \b, baseline ->>(4.S+6) byte x \b, precision %d ->>(4.S+7) beshort x \b, %dx ->>(4.S+9) beshort x \b%d ->(4.S+5) byte 0xC1 \b, extended sequential ->>(4.S+6) byte x \b, precision %d ->>(4.S+7) beshort x \b, %dx ->>(4.S+9) beshort x \b%d ->(4.S+5) byte 0xC2 \b, progressive ->>(4.S+6) byte x \b, precision %d ->>(4.S+7) beshort x \b, %dx ->>(4.S+9) beshort x \b%d -# I've commented-out quantisation table reporting. I doubt anyone cares yet. -#>(4.S+5) byte 0xDB \b, quantisation table -#>>(4.S+6) beshort x \b length=%d - -# HSI is Handmade Software's proprietary JPEG encoding scheme -0 string hsi1 JPEG image data, HSI proprietary |