Ticket #733: coreaudio_sample.rb

require "coreaudio"

outdevid =  CoreAudio.get_default_output_device
puts "Default Output Device ID = #{outdevid}"

callback = lambda do |devid, now, input, in_time, output, out_time, userdata|
  p out_time
  output.mNumberBuffers.times do |i|
    ptr = output.mBuffers[i].mData.cast!("^C")
    output.mBuffers[i].mDataByteSize.times do |j|
      ptr[j] = 0
    end
  end
  0
end
procid =  CoreAudio.create_io_proc_id(outdevid, &callback)

p procid
puts "start"
CoreAudio.device_start(outdevid, procid)
puts "sleep"
sleep 5
puts "stop"
CoreAudio.device_stop(outdevid, procid)

CoreAudio.destroy_io_proc_id(outdevid, procid)