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