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#--
# This file is part of Sonic Pi: http://sonic-pi.net
# Full project source: https://github.com/samaaron/sonic-pi
# License: https://github.com/samaaron/sonic-pi/blob/master/LICENSE.md
#
# Copyright 2013, 2014, 2015, 2016 by Sam Aaron (http://sam.aaron.name).
# All rights reserved.
#
# Permission is granted for use, copying, modification, and
# distribution of modified versions of this work as long as this
# notice is included.
#++
require_relative "buffer"
require_relative "util"
require_relative "sox"
require 'aubio'
module SonicPi
class SampleBuffer < Buffer
include Util
def initialize(buffer, path)
@aubio_onsets = {}
@buffer = buffer
@mono_buffer = nil
@path = path
@aubio_sem = Mutex.new
@slices = {}
@slices_sem = Mutex.new
@sox_sem = Mutex.new
@sox_info = nil
end
def num_frames
@buffer.num_frames
end
def num_chans
@buffer.num_chans
end
def sample_rate
@buffer.sample_rate
end
def duration
@buffer.duration
end
def buffer
@buffer
end
def state
@buffer.state
end
def path
@path
end
def free
@buffer.free
end
def id
@buffer.id
end
def to_i
@buffer.to_i
end
def mono
return self if num_chans == 1
raise "implement me!"
end
def info
return @sox_info if @sox_info
@sox_sem.synchronize do
return @sox_info if @sox_info
@sox_info = Sox.info(@path)
end
return @sox_info
end
def onset_data
return @aubio_onset_data if @aubio_onset_data
@aubio_sem.synchronize do
return @aubio_onset_data if @aubio_onset_data
__no_kill_block do
aubio_file = Aubio.open(@path, {sample_rate: sample_rate})
native_onsets = aubio_file.onsets.to_a.ring
aubio_file.close
@aubio_onset_data = native_onsets
end
end
return @aubio_onset_data
end
def onsets(stretch=1)
return @aubio_onsets[stretch] if @aubio_onsets[stretch]
data = onset_data
@aubio_sem.synchronize do
return @aubio_onsets[stretch] if @aubio_onsets[stretch]
onset_times = data.map do |el|
[1, (el[:s].to_f / duration)].min * stretch
end
@aubio_onsets[stretch] = onset_times
end
return @aubio_onsets[stretch]
end
def onset_slices
return @aubio_slices if @aubio_slices
ons = onsets
@aubio_sem.synchronize do
return @aubio_slices if @aubio_slices
res = []
ons[0...-1].each_with_index do |onset, idx|
res << {:start => onset, :finish => ons[idx + 1], index: idx}
end
@aubio_slices = res.ring
end
return @aubio_slices
end
def slices(num=16, start=0, finish=1)
return @slices[[num, start, finish]] if @slices[[num, start, finish]]
res = []
@slices_sem.synchronize do
return @slices[[num, start, finish]] if @slices[[num, start, finish]]
raise "start arg must be a number, got: #{start.inspect}" unless start.is_a?(Numeric)
raise "finish arg must be a number, got: #{finish.inspect}" unless finish.is_a?(Numeric)
slice_size = (finish - start) / num.to_f
prev = start
val = start + slice_size
num = num.to_i
num.times do |n|
res << {:start => prev, :finish => val, index: n}
prev = val
val += slice_size
end
res = res.ring
@slices[[num, start, finish]] = res
end
return res
end
def inspect
to_s
end
def to_s
if @buffer.path
"#<SampleBuffer @id=#{@buffer.id}, @num_chans=#{@buffer.num_chans}, @num_frames=#{@buffer.num_frames}, @sample_rate=#{@buffer.sample_rate}, @duration=#{@buffer.duration}, @path=#{@buffer.path}>"
else
"#<SampleBuffer @id=#{@buffer.id}, @num_chans=#{@buffer.num_chans.inspect}, @num_frames=#{@buffer.num_frames}, @sample_rate=#{@buffer.sample_rate}, @duration=#{@buffer.duration}>"
end
end
end
end
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