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Contents
require 'wavefile'
module Mext
module Sound
#
# +Mext::Sound::Info+
#
# +Mext::Sound::Info+ is a class that holds all the information
# about a given sound sample.
#
# PLEASE NOTE: current implementation only supports wav files.
# You are welcome to contribute a more encompassing one.
#
class Info
attr_reader :filename, :sound_dir
attr_reader :sample_rate, :channels, :num_frames
def initialize(f, dir)
@filename = f
@sound_dir = dir
setup
end
#
# +dur+
#
# returns the total duration in seconds, calculating it with
# sample precision
#
def dur
self.num_frames.to_f / self.sample_rate.to_f
end
private
def setup
path = File.join(self.sound_dir, self.filename)
WaveFile::Reader.new(path) do
|reader|
@sample_rate = reader.format.sample_rate
@num_frames = reader.total_sample_frames
@total_dur = reader.total_duration # FIXME: kept but not used for now
@channels = reader.format.channels
end
end
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems