1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
# frozen_string_literal: true
module ESpeak
# Speech represents an Text-To-Speech audio that can be played or saved to file
class Speech
attr_reader :options, :text
# filename - The file that will be generated
# options - Posible key, values
# :voice - use voice file of this name from espeak-data/voices. ie 'en', 'de', ...
# :pitch - pitch adjustment, 0 to 99
# :speed - speed in words per minute, 80 to 370
# :capital - increase emphasis of capitalized letters by raising pitch by this amount
# no range given in man but good range is 10-40 to start
# :amplitude - amplitude adjustment, 0 to 200
# :quiet - remove printing to stdout. Affects only lame (default false)
#
def initialize(text, options = {})
@text = text
@options = options
end
# Speaks text
#
def speak
IO.popen(espeak_command(command_options), 'r', &:read)
end
# Generates mp3 file as a result of
# Text-To-Speech conversion.
#
def save(filename)
speech = bytes_wav
res = IO.popen(lame_command(filename, command_options), 'r+') do |process|
process.write(speech)
process.close_write
process.read
end
res.to_s
end
# Returns mp3 file bytes as a result of
# Text-To-Speech conversion.
#
def bytes
speech = bytes_wav
res = IO.popen(std_lame_command(command_options), 'r+') do |process|
process.write(speech)
process.close_write
process.read
end
res.to_s
end
# Returns wav file bytes as a result of
# Text-To-Speech conversion.
#
def bytes_wav
IO.popen(espeak_command(command_options, '--stdout'), 'r', &:read)
end
private
def command_options
default_options.merge(options.transform_keys(&:to_sym))
end
# Although espeak itself has default options
# I'm defining them here for easier generating
# command (with simple hash.merge)
#
def default_options
{ voice: 'en',
pitch: 50,
speed: 170,
capital: 1,
amplitude: 100,
quiet: true }
end
def espeak_command(options, flags = '')
['espeak', @text.to_s, flags.to_s, "-v#{options[:voice]}", "-p#{options[:pitch]}", "-k#{options[:capital]}",
"-s#{options[:speed]}", "-a#{options[:amplitude]}"]
end
def std_lame_command(options)
lame_command('-', options)
end
def lame_command(filename, options)
['lame', '-V2', '-', filename.to_s, ('--quiet' if options[:quiet] == true).to_s]
end
end
end
|
