Parent

Included Modules

Ogg::Codecs::Speex

Public Class Methods

decode_headers(reader) click to toggle source
# File lib/ogg/codecs/speex.rb, line 10
def decode_headers(reader)
  init_packet, tag_packet = reader.read_packets(2)
  info = extract_info(init_packet)
  info[:tag], info[:tag_vendor] = unpack_comments(tag_packet)
  return info
end
extract_info(info_packet) click to toggle source
# File lib/ogg/codecs/speex.rb, line 22
def extract_info(info_packet)
  _, #speex_string,
  _, #speex_version,
  _, #speex_version_id,
  _, #header_size,
  samplerate,
  _, #mode,
  _, #mode_bitstream_version,
  channels,
  nominal_bitrate,
  #framesize, vbr
  _, _ = info_packet.unpack("A8A20VVVVVVVVV")
  #not sure how to make sense of the bitrate info,picard doesn't show it either...
  
  return { :channels => channels, :samplerate => samplerate, :nominal_bitrate => nominal_bitrate }
end
match?(header_packet) click to toggle source
# File lib/ogg/codecs/speex.rb, line 6
def match?(header_packet)
  header_packet.start_with?("Speex")
end
replace_tags(reader, writer, new_tags, vendor) click to toggle source
# File lib/ogg/codecs/speex.rb, line 17
def replace_tags(reader, writer, new_tags, vendor)
  _ = reader.read_packets(1) # tag_packet
  writer.write_packets(0, pack_comments(new_tags, vendor))
end

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