#!/bin/env ruby 
#
# Ruby client for the MARY TTS HTTP server.
# This is for Windows only, and relies on 
# the Win32-Sound gem to access the audio.
#
#
require 'rubygems'
require 'win32/sound'
require 'net/http'
require 'uri'

# A fairly minimal client class for the
# MARY TTS system.  This uses the modern
# HTTP interface to access the server.
# It is limited, at the moment, to Windows
# systems and relies on the Win32-Sound gem
# which must be obtained in the usual way
# that Rubygems are obtained.
# At present, this doesn't wrap the methods
# which provide documentation or lists of
# voices or features.
class WinMaryClient
  attr_accessor :host, :port
  attr_accessor :input_type, :output_type
  attr_accessor :locale, :audio, :voice

  # Set up the defaults for the MARY TTS
  # server, which is assumed to be running
  # on the local host, with British voices
  # installed.  These may be modified with 
  # the appropriate methods.
  # host = 127.0.0.1)
  # port = 59125
  # input_type = "TEXT" 
  # output_type = "AUDIO"
  # audio = "WAVE_FILE"
  # locale = "en_GB"
  # voice = "dfki-prudence-hsmm"
  def initialize
    @host = "127.0.0.1"	# The local machine
    @port = 59125
    @input_type = "TEXT"
    @output_type = "AUDIO"
    @locale = "en_GB"
    @audio = "WAVE_FILE"
    @voice = "dfki-prudence-hsmm"
  end

  # Process a text message, which with a
  # new client, will just say it.
  def say(message)
    raw_params = {"INPUT_TEXT" => message,
                "INPUT_TYPE" => @input_type,
                "OUTPUT_TYPE" => @output_type,
                "LOCALE" => @locale,
                "AUDIO" => @audio,
                "VOICE" => @voice,
                }
    res = Net::HTTP.post_form(URI.parse("http://#{@host}:#{@port}/process"), raw_params)
    res.value # Throw an exception on failure
    if res.get_fields('content-type')[0] =~ /^audio\//i
      Win32::Sound.play(res.body, Win32::Sound::MEMORY)
    else
      #puts res.body
      return res.body
    end
  end
end

# If this invoked as a program, just give a 
# greeting to show that it is working.
if __FILE__ == $0
  client = WinMaryClient.new()
  client.say("Hello from Mary Text to Speech with Ruby.")
end