PulseAudio sink-output changer

pamove

#!/usr/bin/env ruby

class String
  def to_i_first
    self.match(/\d+/)[0].to_i
  end

  def unquote_str
    self.match(/"(.*)"/)[1]
  end
end

def get_sinks
  sinks_str = `pacmd list-sinks`.split("\n").slice_before(/index:/).drop(1)

  sinks_str.map do |lines|
    name_raw = lines.grep(/device.product.name/).first

    [
      lines[0].to_i_first,
      {
        name: name_raw.unquote_str,
        is_active: lines[0].include?("*"),
      }
    ]
  end.to_h
end

def get_sink_inputs
  sink_inputs_str = `pacmd list-sink-inputs`.split("\n").slice_before(/index:/).drop(1)

  sink_inputs_str.map do |lines|
    [
      lines[0].to_i_first,
      {
        sink_id: lines.grep(/sink: /).first.to_i_first,
        name: lines.grep(/application.name/).first.unquote_str,
      }
    ]
  end.to_h
end

if ARGV.size != 0 && ARGV.size != 2
  puts "#{$0} [sink_input_id sink_id]"
  exit 0
end

sinks = get_sinks
sink_inputs = get_sink_inputs

if ARGV.size == 2
  sink_input_id = ARGV[0].to_i
  sink_id = ARGV[1].to_i

  unless sink_inputs[sink_input_id]
    puts "Invalid sink_input_id: #{ARGV[0]}"
  end
  
  unless sinks[sink_id]
    puts "Invalid sink_id: #{ARGV[1]}"
  end
  
  `pacmd set-default-sink #{sink_id}`
  puts "Set default sink: #{sinks[sink_id][:name]} (ID: #{sink_id})"
  `pacmd move-sink-input #{sink_input_id} #{sink_id}`
  puts "Moved sink_input #{sink_inputs[sink_input_id][:name]} (ID: #{sink_input_id}) to default sink"
  puts

  sinks = get_sinks
  sink_inputs = get_sink_inputs
end

puts "Sink inputs:"
sink_inputs.each{|k, v| puts "  #{k}: #{v[:name]} => #{sinks[v[:sink_id]][:name]} (ID: #{v[:sink_id]})" }

puts

puts "Sinks:"
sinks.each{|k, v| puts "#{v[:is_active] ? "*" : " "} #{k}: #{v[:name]}" }