testing.tools.strip_jp2_comments Namespace Reference

Functions
	parse_box (buffer, offset)
	parse_marker (buffer, offset)
	rewrite_jp2c (buffer)
	main (in_file, out_file)

Variables
int	BOX_HEADER_SIZE = 8
str	BOX_TAG_JP2C = b'jp2c'
int	MARKER_SIZE = 2
int	MARKER_START = 0xff
int	MARKER_TAG_IGNORE = 0x00
int	MARKER_TAG_COMMENT = 0x64
int	MARKER_TAG_FILL = 0xff

Detailed Description

Strips comments from a JP2 file.

This is a simple filter script to strip comments from a JP2 file, in order to
save a few bytes from the final file size.

Function Documentation

main()

testing.tools.strip_jp2_comments.main	(		in_file,
			out_file )

Definition at line 105 of file strip_jp2_comments.py.

References main(), testing.tools.strip_jp2_comments.parse_box(), and testing.tools.strip_jp2_comments.rewrite_jp2c().

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parse_box()

testing.tools.strip_jp2_comments.parse_box	(		buffer,
			offset )

Parses the next box in a JP2 file.

Args:
  buffer: A buffer containing the JP2 file contents.
  offset: The starting offset into the buffer.

Returns:
  A tuple (next_offset, tag) where next_offset is the ending offset, and tag
  is the type tag. The box contents will be buffer[offset + 8:next_offset].

Definition at line 24 of file strip_jp2_comments.py.

Referenced by testing.tools.strip_jp2_comments.main().

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parse_marker()

testing.tools.strip_jp2_comments.parse_marker	(		buffer,
			offset )

Parses the next marker in a codestream.

Args:
  buffer: A buffer containing the codestream.
  offset: The starting offset into the buffer.

Returns:
  A tuple (next_offset, tag) where next_offset is the offset after the marker,
  and tag is the type tag. If no marker was found, next_offset will point to
  the end of the buffer, and tag will be None. A marker is always 2 bytes.

Definition at line 39 of file strip_jp2_comments.py.

Referenced by testing.tools.strip_jp2_comments.rewrite_jp2c().

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rewrite_jp2c()

testing.tools.strip_jp2_comments.rewrite_jp2c

(

buffer

)

Definition at line 76 of file strip_jp2_comments.py.

References bytearray, and testing.tools.strip_jp2_comments.parse_marker().

Referenced by testing.tools.strip_jp2_comments.main().

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Variable Documentation

BOX_HEADER_SIZE

int testing.tools.strip_jp2_comments.BOX_HEADER_SIZE = 8

Definition at line 14 of file strip_jp2_comments.py.

BOX_TAG_JP2C

str testing.tools.strip_jp2_comments.BOX_TAG_JP2C = b'jp2c'

Definition at line 15 of file strip_jp2_comments.py.

MARKER_SIZE

int testing.tools.strip_jp2_comments.MARKER_SIZE = 2

Definition at line 17 of file strip_jp2_comments.py.

MARKER_START

int testing.tools.strip_jp2_comments.MARKER_START = 0xff

Definition at line 18 of file strip_jp2_comments.py.

MARKER_TAG_COMMENT

int testing.tools.strip_jp2_comments.MARKER_TAG_COMMENT = 0x64

Definition at line 20 of file strip_jp2_comments.py.

MARKER_TAG_FILL

int testing.tools.strip_jp2_comments.MARKER_TAG_FILL = 0xff

Definition at line 21 of file strip_jp2_comments.py.

MARKER_TAG_IGNORE

int testing.tools.strip_jp2_comments.MARKER_TAG_IGNORE = 0x00

Definition at line 19 of file strip_jp2_comments.py.