Sha256: 31787cb9f72c3206d8f7bbd6ea0482dc326fe675c2355f971b1834f233c48015
Contents?: true
Size: 1.35 KB
Versions: 11
Compression:
Stored size: 1.35 KB
Contents
class FormatParser::CR3Parser
include FormatParser::IOUtils
require_relative 'cr3_parser/decoder'
CR3_MIME_TYPE = 'image/x-canon-cr3'
MAGIC_BYTES = 'ftypcrx '
def likely_match?(filename)
filename =~ /\.cr3$/i
end
def call(io)
@buf = FormatParser::IOConstraint.new(io)
return unless matches_cr3_definition?
box_tree = Measurometer.instrument('format_parser.cr3_parser.decoder.build_box_tree') do
Decoder.new.build_box_tree(0xffffffff, @buf)
end
moov_box = box_tree.find { |box| box.type == 'moov' }
cmt1_box = moov_box&.first_descendent('CMT1')
return unless cmt1_box
width = cmt1_box.fields[:image_width]
height = cmt1_box.fields[:image_length]
rotated = cmt1_box.fields[:rotated]
orientation = cmt1_box.fields[:orientation_sym]
FormatParser::Image.new(
format: :cr3,
content_type: CR3_MIME_TYPE,
width_px: width,
height_px: height,
orientation: orientation,
display_width_px: rotated ? height : width,
display_height_px: rotated ? width : height,
intrinsics: {
box_tree: box_tree,
exif: cmt1_box.fields,
},
)
end
private
def matches_cr3_definition?
skip_bytes(4)
matches = read_string(8) == MAGIC_BYTES
@buf.seek(0)
matches
end
FormatParser.register_parser new, natures: [:image], formats: [:cr3]
end
Version data entries
11 entries across 11 versions & 1 rubygems