def _switch_data_type(self):
self.isStream = not self.isStream
if not self.isStream:
self.isWhite = not self.isWhite
logger.debug('switched to stream: %s and white: %s' % (self.isStream, self.isWhite,))
# recall us again, over and over again dude
return True
def OnDynamicPad(self, dbin, pad):
logger.debug("OnDynamicPad Called! %s %s" % (dbin.get_name(), pad,))
caps = pad.query_caps(None)
logger.debug(' with capabilities: %s' % caps.to_string())
if caps.to_string().startswith('audio'):
pad.link(self.convert.get_static_pad('sink'))
elif caps.to_string().startswith('video'):
pad.link(self.videosink.get_static_pad('sink'))
def push_data(self, source):
bff = self.copy_from_data() if self.isStream else self.build_white_black_stream(320, 240, 2)
if bff is None:
return True
result = source.emit('push-buffer', bff)
logger.debug('pushed %s' % bff)
if result != Gst.FlowReturn.OK:
logger.debug('error on on_need_data: %s' % result)
g_main_loop.quit()
return True
def build_white_black_stream(self, width, height, depth):
logger.debug('white: %s' % self.isWhite)
# http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/section-data-spoof.html#section-spoof-appsrc
size = width * height * depth
bffer = Gst.Buffer.new_allocate(None, size, None)
bffer.memset(0, 0x00 if self.isWhite else 0xff, size)
bffer.pts = self.timestamp
bffer.duration = Gst.util_uint64_scale_int(1, Gst.SECOND, 30)
# NOTE: if you remove this line below the stream after the first
# switch doesn't re-switch and the stream appears lagging
self.timestamp += bffer.duration
return bffer
def on_need_data(self, source, *args):
logger.debug('on_need_dat')
if not self.source_id:
self.source_id = GObject.idle_add(self.push_data, source)
def on_new_buffer(self, appsink):
with self.lock:
bffer = appsink.emit('pull-sample')
self.data = bffer
# logger.info('. %s' % buffer.get_caps().to_string())
logger.debug('pulled %s' % self.data)
def on_enough_data(self, *args):
logger.debug('enough data')
if self.source_id:
GObject.source_remove(self.source_id)
self.source_id = None
self.timestamp += bffer.duration
return bffer
def push_data(self, source):
bff = self.copy_from_data() if self.isStream else self.build_white_black_stream(320, 240, 2)
if bff is None:
return True
result = source.emit('push-buffer', bff)
logger.debug('pushed %s' % bff)
if result != Gst.FlowReturn.OK:
logger.debug('error on on_need_data: %s' % result)
g_main_loop.quit()
return True
def on_enough_data(self, *args):
logger.debug('enough data')
if self.source_id:
GObject.source_remove(self.source_id)
self.source_id = None
if __name__ == '__main__':
start=Main()
logger.debug('start')
g_main_loop.run()