114 lines
4.1 KiB
Python
114 lines
4.1 KiB
Python
#!/bin/python
|
|
# -*- coding: utf-8 -*-
|
|
|
|
# Fenrir TTY screen reader
|
|
# By Chrys, Storm Dragon, and contributers.
|
|
|
|
from fenrirscreenreader.core import debug
|
|
import time, threading
|
|
from fenrirscreenreader.core.soundDriver import soundDriver
|
|
|
|
_gstreamerAvailable = False
|
|
try:
|
|
import gi
|
|
from gi.repository import GLib
|
|
gi.require_version('Gst', '1.0')
|
|
from gi.repository import Gst
|
|
_gstreamerAvailable, args = Gst.init_check(None)
|
|
except Exception as e:
|
|
_gstreamerAvailable = False
|
|
_availableError = str(e)
|
|
|
|
class driver(soundDriver):
|
|
def __init__(self):
|
|
soundDriver.__init__(self)
|
|
self._source = None
|
|
self._sink = None
|
|
|
|
def initialize(self, environment):
|
|
self.env = environment
|
|
global _gstreamerAvailable
|
|
self._initialized = _gstreamerAvailable
|
|
if not self._initialized:
|
|
global _availableError
|
|
self.environment['runtime']['debug'].writeDebugOut('Gstreamer not available ' + _availableError,debug.debugLevel.ERROR)
|
|
return
|
|
self._player = Gst.ElementFactory.make('playbin', 'player')
|
|
bus = self._player.get_bus()
|
|
bus.add_signal_watch()
|
|
bus.connect("message", self._onPlayerMessage)
|
|
|
|
self._pipeline = Gst.Pipeline(name='fenrir-pipeline')
|
|
bus = self._pipeline.get_bus()
|
|
bus.add_signal_watch()
|
|
bus.connect("message", self._onPipelineMessage)
|
|
|
|
self._source = Gst.ElementFactory.make('audiotestsrc', 'src')
|
|
self._sink = Gst.ElementFactory.make('autoaudiosink', 'output')
|
|
self._pipeline.add(self._source)
|
|
self._pipeline.add(self._sink)
|
|
self._source.link(self._sink)
|
|
self.mainloop = GLib.MainLoop()
|
|
self.thread = threading.Thread(target=self.mainloop.run)
|
|
self.thread.start()
|
|
|
|
def shutdown(self):
|
|
if not self._initialized:
|
|
return
|
|
self.cancel()
|
|
self.mainloop.quit()
|
|
|
|
def _onPlayerMessage(self, bus, message):
|
|
if not self._initialized:
|
|
return
|
|
if message.type == Gst.MessageType.EOS:
|
|
self._player.set_state(Gst.State.NULL)
|
|
elif message.type == Gst.MessageType.ERROR:
|
|
self._player.set_state(Gst.State.NULL)
|
|
error, info = message.parse_error()
|
|
self.env['runtime']['debug'].writeDebugOut('GSTREAMER: _onPlayerMessage'+ str(error) + str(info),debug.debugLevel.WARNING)
|
|
|
|
def _onPipelineMessage(self, bus, message):
|
|
if not self._initialized:
|
|
return
|
|
if message.type == Gst.MessageType.EOS:
|
|
self._pipeline.set_state(Gst.State.NULL)
|
|
elif message.type == Gst.MessageType.ERROR:
|
|
self._pipeline.set_state(Gst.State.NULL)
|
|
error, info = message.parse_error()
|
|
self.env['runtime']['debug'].writeDebugOut('GSTREAMER: _onPipelineMessage'+ str(error) + str(info),debug.debugLevel.WARNING)
|
|
|
|
def _onTimeout(self, element):
|
|
if not self._initialized:
|
|
return
|
|
element.set_state(Gst.State.NULL)
|
|
|
|
def playSoundFile(self, fileName, interrupt=True):
|
|
if not self._initialized:
|
|
return
|
|
if interrupt:
|
|
self.cancel()
|
|
self._player.set_property('uri', 'file://%s' % fileName)
|
|
self._player.set_state(Gst.State.PLAYING)
|
|
|
|
def playFrequence(self, frequence, duration, adjustVolume, interrupt=True):
|
|
if not self._initialized:
|
|
return
|
|
if interrupt:
|
|
self.cancel()
|
|
self._source.set_property('volume', tone.volume)
|
|
self._source.set_property('freq', tone.frequency)
|
|
self._source.set_property('wave', tone.wave)
|
|
self._pipeline.set_state(Gst.State.PLAYING)
|
|
duration = int(1000 * tone.duration)
|
|
GLib.timeout_add(duration, self._onTimeout, self._pipeline)
|
|
|
|
def cancel(self, element=None):
|
|
if not self._initialized:
|
|
return
|
|
if element:
|
|
element.set_state(Gst.State.NULL)
|
|
return
|
|
self._player.set_state(Gst.State.NULL)
|
|
self._pipeline.set_state(Gst.State.NULL)
|