Google TTS

1-google-tts-usage.rb

  def tts(message, lang = 'en-US')
    GoogleTTS.download(message, lang)
  end

  def read_pin(message, lang = 'en-US')
    prompt = { audio: ANNOUNCEMENTS[lang][message],
               max_digits: 10,
               timeout: 20 }
    #3.times do |attempt_no|
      data = begin
        AGISelection.new(prompt).read(:agi => agi).to_s
      rescue => e
        ''
      end

      LOGGER.info "Entered data: #{data.inspect}"
      result = data.to_s
      return result unless result.empty?

      # change announcement here (no result)

      crm_empty_pin
    #end
    ''
  end

2-google-tts.rb

# encoding: utf-8

# Main module source taken here
# https://gist.github.com/pachacamac/2906367
# and
# http://jaredlevitz.com/post/61885725912/from-text-to-speech-using-ruby-and-google-translate

require 'net/http'

module GoogleTTS
  require 'digest/md5'
  require 'restclient'
  TTS_PATH = "#{APP_ROOT}/tts"

  class << self
    def play(text, lang='en-US')
      file = download_audio(text, lang)
      mp3 = "#{file}.mp3"
      @gttspid = fork{ exec 'mpg123', '-q', file }
    end

    def download(text, lang='en-US')
      file = download_audio(text, lang)
      mp3 = "#{file}.mp3"
      sln = "#{file}.sln"
      unless File.exist?(sln)
        system("ffmpeg -i #{mp3} -ar 8000 -ac 1 -acodec pcm_s16le -f s16le -y #{sln} 2> /dev/null")
      end
      file
    end

    private

    def download_audio(text, lang='en-US')
      digest = Digest::MD5.hexdigest("#{lang}_#{text}")
      file = "#{TTS_PATH}/gtts_#{digest}"
      mp3 = "#{file}.mp3"
      uri = URI('http://translate.google.com/translate_tts')

      unless File.exist?(mp3)
        # File.open(mp3, 'w') do |f|
        #   f.write RestClient.get("http://translate.google.com/translate_tts?tl=#{lang}&q=#{URI.encode(text)}")
        # end

        attempts = text.length / 99.0
        starts = 0
        ar = response = []

        attempts.ceil.times do
          ends = starts + 99
          ar << text[starts...ends]
          starts = ends
        end

        ar.each do |q|
          uri.query = URI.encode_www_form({ ie: 'UTF-8', q: q, tl: lang, total: 1, idx: 5, textlen: q.length, prev: 'input'  })
          res = Net::HTTP.get_response(uri)

          response << res.body.force_encoding(Encoding::UTF_8) if res.is_a?(Net::HTTPSuccess)
        end

        File.open(mp3, 'wb') do |f|
          f.write response.join
          # return f.path
        end

      end
      file
    end

  end
end