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ctypes Python module for eSpeak

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• Maxim Kolosov

[Maxim Kolosov]

# speech to sound card example
from pyespeak import *
output = AUDIO_OUTPUT_SYNCH_PLAYBACK
print('pyespeak version %s eSpeak library %s' % (pyespeak_version, repr(c_module)))
result = espeak_Initialize(output, 0, '.', 0)
if result == EE_INTERNAL_ERROR:
 print('ERROR Initialize eSpeak')
else:
 print('sample rate in Hz %d' % result)
 print('eSpeak version %s' % repr(espeak_Info()))
 if output in (AUDIO_OUTPUT_SYNCHRONOUS, AUDIO_OUTPUT_SYNCH_PLAYBACK):
  def espeak_callback(wav, numsamples, events):
   print('=== espeak_callback %s' % repr((wav, numsamples, events)))
   return 0
  SynthCallback = t_espeak_callback(espeak_callback)
  print('espeak_SetSynthCallback', espeak_SetSynthCallback(SynthCallback))
 print('espeak_SetVoiceByName %d' % espeak_SetVoiceByName('default'))
 print('espeak_Char %d' % espeak_Char(u'a'))
 synth_flags = espeakCHARS_AUTO | espeakPHONEMES | espeakENDPAUSE
 pytext = 'Hello world!'
 text = ctypes.create_string_buffer(pytext, len(pytext))
 print('espeak_Synth %d' % espeak_Synth(text, ctypes.sizeof(text)+1, 0, POS_CHARACTER, 0, synth_flags, None, None))
 print('espeak_Synchronize %d' % espeak_Synchronize())
 print('espeak_Terminate %d' % espeak_Terminate())

[Maxim Kolosov]

# speech to WAV file example
import wave
from pyespeak import *

global f_wavfile, samples_total, samples_split_seconds, wavefile_count
file_name = 'test'
file_type = 'wav'

def OpenWavFile(path, frame_rate, sample_width):
    global f_wavfile
    f_wavfile = wave.open(path, 'wb')
    if f_wavfile:
        f_wavfile.setnchannels(1)
        if frame_rate <= 0:
            f_wavfile.setframerate(22050)
        else:
            f_wavfile.setframerate(frame_rate)
        if sample_width < 1 or sample_width > 4:
            f_wavfile.setsampwidth(2)
        else:
            f_wavfile.setsampwidth(sample_width)
    else:
        print("Can't create: '%s'" % path)
        return False
    return True

def CloseWavFile():
    global f_wavfile
    if not f_wavfile:
        return
    f_wavfile.close()
    f_wavfile = None

def espeak_callback(wav, numsamples, events):
    global f_wavfile, samples_total, samples_split_seconds, wavefile_count
    if wav is None:
        CloseWavFile()
        return 0
    events_index = 0
    samples_split = 0
    samplerate = 0
    while events[events_index].type != 0:
        if events[events_index].type == espeakEVENT_SAMPLERATE:
            samplerate = events[events_index].id.number
            samples_split = samples_split_seconds * samplerate
        elif events[events_index].type == espeakEVENT_SENTENCE:
            if (samples_split > 0) or (samples_total > samples_split):
                CloseWavFile()
                samples_total = 0
                wavefile_count += 1
        events_index += 1
    if not f_wavfile:
        fname = "%s_%.2d.%s" % (file_name, wavefile_count+1, file_type)
        if not OpenWavFile(fname, samplerate, numsamples):
            return 1
    if f_wavfile and numsamples > 0:
        samples_total += numsamples
        f_wavfile.writeframes(ctypes.string_at(wav, numsamples*2))
    return 0

if __name__ == "__main__":
    global f_wavfile, samples_total, samples_split_seconds, wavefile_count
    f_wavfile = None
    samples_total = 0
    samples_split_seconds = 0
    wavefile_count = 0
    output = AUDIO_OUTPUT_SYNCHRONOUS
    print('pyespeak version %s eSpeak library %s' % (pyespeak_version, repr(c_module)))
    result = espeak_Initialize(output, 0, '.', 0)
    if result == EE_INTERNAL_ERROR:
        print('ERROR Initialize eSpeak')
    else:
        print('sample rate in Hz %d' % result)
        print('eSpeak version %s' % repr(espeak_Info()))
        if output in (AUDIO_OUTPUT_SYNCHRONOUS, AUDIO_OUTPUT_SYNCH_PLAYBACK):
            SynthCallback = t_espeak_callback(espeak_callback)
            print('espeak_SetSynthCallback', espeak_SetSynthCallback(SynthCallback))
        print('espeak_SetVoiceByName %d' % espeak_SetVoiceByName('default'))
        print('espeak_Char %d' % espeak_Char(u'a'))
        synth_flags = espeakCHARS_AUTO | espeakPHONEMES | espeakENDPAUSE
        pytext = 'Hello world!'
        text = ctypes.create_string_buffer(pytext, len(pytext))
        print('espeak_Synth %d' % espeak_Synth(text, ctypes.sizeof(text)+1, 0, POS_CHARACTER, 0, synth_flags, None, None))
        print('espeak_Synchronize %d' % espeak_Synchronize())
        print('espeak_Terminate %d' % espeak_Terminate())