class NuWav::Chunk

Attributes

id[RW]
pad_byte[RW]
raw[RW]
size[RW]

Public Class Methods

new(id=nil, size=nil, raw=nil) click to toggle source
# File lib/nu_wav/chunk.rb, line 12
def initialize(id=nil, size=nil, raw=nil)
  @id, @size, @raw = id, size, raw
end
parse(id, size, file) click to toggle source
# File lib/nu_wav/chunk.rb, line 5
def self.parse(id, size, file)
  raw = file.read(size)
  chunk = self.new(id, size, raw)
  chunk.parse
  return chunk
end

Public Instance Methods

parse() click to toggle source
# File lib/nu_wav/chunk.rb, line 16
def parse
end
read_char(start, length=(@raw.length-start)) click to toggle source
# File lib/nu_wav/chunk.rb, line 27
def read_char(start, length=(@raw.length-start))
  (@raw[start..(start+length-1)] || '').strip
end
read_dword(start) click to toggle source
# File lib/nu_wav/chunk.rb, line 19
def read_dword(start)
  @raw[start..(start+3)].unpack('V').first
end
read_word(start) click to toggle source
# File lib/nu_wav/chunk.rb, line 23
def read_word(start)
  @raw[start..(start+1)].unpack('v').first
end
to_binary(options={}) click to toggle source
# File lib/nu_wav/chunk.rb, line 52
def to_binary(options={})
end
write_char(val, length=nil) click to toggle source
# File lib/nu_wav/chunk.rb, line 41
def write_char(val, length=nil)
  val ||= ''
  val = val.to_s
  length ||= val.length
  # NuWav::WaveFile.log "length:#{length} val.length:#{val.length} val:#{val}"
  padding = "\0" * [(length - val.length), 0].max
  out = val[0,length] + padding
  # NuWav::WaveFile.log out
  out
end
write_dword(val) click to toggle source
# File lib/nu_wav/chunk.rb, line 31
def write_dword(val)
  val ||= 0
  [val].pack('V')
end
write_word(val) click to toggle source
# File lib/nu_wav/chunk.rb, line 36
def write_word(val)
  val ||= 0
  [val].pack('v')
end