Module: Tts

Included in:
String
Defined in:
lib/tts.rb

Constant Summary collapse

@@default_url = 
"http://translate.google.com/translate_tts"
@@user_agent = 
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.68 Safari/534.24"
@@referer = 
"http://translate.google.com/"

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.server_url(url = nil) ⇒ Object 



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# File 'lib/tts.rb', line 10

def self.server_url url=nil
  return @@default_url if url.nil?
  @@default_url = url
end

Instance Method Details

#chunk_text(text) ⇒ Object 



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# File 'lib/tts.rb', line 32

def chunk_text text
  chunks = []
  words = split_into_words(text)
  chunk = ''
  words.each do |word|
    if (chunk.length + word.length) > 100
      chunks << chunk.strip!
      chunk = ''
    end
    chunk += "#{word} "
  end
  chunks << chunk.strip!
end

#fetch_mp3(url, file_name) ⇒ Object 



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# File 'lib/tts.rb', line 64

def fetch_mp3 url, file_name
  begin 
    content = open(url, "User-Agent" => @@user_agent, "Referer" => @@referer).read
 
    File.open("temp.mp3", "wb") do |f|
      f.puts content
    end
    merge_mp3_file(file_name)
  rescue => e
    $stderr.puts("Internet error! #{e.message}")
    exit(1)
  end
end

#generate_file_name ⇒ Object 



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# File 'lib/tts.rb', line 50

def generate_file_name
  to_valid_fn + ".mp3"
end

#merge_mp3_file(file_name) ⇒ Object 



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# File 'lib/tts.rb', line 78

def merge_mp3_file file_name
  `cat temp.mp3 >> "#{file_name}" && rm temp.mp3`
end

#play(lang = "en", times = 1, pause_gap = 1) ⇒ Object 



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# File 'lib/tts.rb', line 82

def play lang="en", times=1, pause_gap = 1 
  #test if mpg123 exists?
  `which mpg123`
  if $?.to_i != 0
    puts "mpg123 executable NOT found. This function only work with POSIX systems.\n Install mpg123 with `brew install mpg123` or `apt-get install mpg123`"
    exit 1
  end
  fn = "tts_playonce"
  self.to_file(lang, fn)
  times.times{|i| `mpg123 -q #{fn}`}
  File.delete(fn)
end

#split_into_words(text) ⇒ Object 



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# File 'lib/tts.rb', line 46

def split_into_words text
  text.gsub(/\s+/m, ' ').strip.split(" ")
end

#to_file(lang, file_name = nil) ⇒ Object 



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# File 'lib/tts.rb', line 15

def to_file lang, file_name=nil
  parts = validate_text_length(self)
  file_name = self[0..20].generate_file_name if file_name.nil?
  parts.each do |part|
    url = part.to_url(lang)
    fetch_mp3(url, file_name) 
  end
end

#to_url(lang) ⇒ Object 



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# File 'lib/tts.rb', line 58

def to_url lang
  langs = ['af', 'ar', 'az', 'be', 'bg', 'bn', 'ca', 'cs', 'cy', 'da', 'de', 'el', 'en', 'en_us', 'en_gb', 'en_au', 'eo', 'es', 'et', 'eu', 'fa', 'fi', 'fr', 'ga', 'gl', 'gu', 'hi', 'hr', 'ht', 'hu', 'id', 'is', 'it', 'iw', 'ja', 'ka', 'kn', 'ko', 'la', 'lt', 'lv', 'mk', 'ms', 'mt', 'nl', 'no', 'pl', 'pt', 'ro', 'ru', 'sk', 'sl', 'sq', 'sr', 'sv', 'sw', 'ta', 'te', 'th', 'tl', 'tr', 'uk', 'ur', 'vi', 'yi', 'zh', 'zh-CN', 'zh-TW']
  raise "Not accepted language, accpeted are #{langs * ","}" unless langs.include? lang
  base = "#{Tts.server_url}?tl=#{lang}&ie=UTF-8&client=t&q=#{URI.escape self}"
end

#to_valid_fn ⇒ Object 



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# File 'lib/tts.rb', line 54

def to_valid_fn 
  gsub(/[\x00\/\\:\*\?\"<>\|]/, '_')
end

#validate_text_length(text) ⇒ Object 



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# File 'lib/tts.rb', line 24

def validate_text_length text
  if text.length > 100
    chunk_text(text)
  else 
    [text]
  end
end