- import logging
- from gi.repository import Gst
- from lib.config import Config
- from lib.tcpmulticonnection import TCPMultiConnection
- from lib.clock import Clock
- class AVPreviewOutput(TCPMultiConnection):
- def __init__(self, channel, port):
- self.log = logging.getLogger('AVPreviewOutput['+channel+']')
- super().__init__(port)
- self.channel = channel
- if Config.has_option('previews', 'videocaps'):
- vcaps_out = Config.get('previews', 'videocaps')
- else:
- vcaps_out = Config.get('mix', 'videocaps')
- pipeline = """
- interaudiosrc channel=audio_{channel} !
- {acaps} !
- queue !
- mux.
- intervideosrc channel=video_{channel} !
- {vcaps_in} !
- videorate !
- videoscale method=nearest-neighbour !
- {vcaps_out} !
- jpegenc !
- queue !
- mux.
- matroskamux
- name=mux
- streamable=true
- writing-app=Voctomix-AVPreviewOutput !
- multifdsink
- buffers-max=500
- sync-method=next-keyframe
- name=fd
- """.format(
- channel=self.channel,
- acaps=Config.get('mix', 'audiocaps'),
- vcaps_in=Config.get('mix', 'videocaps'),
- vcaps_out=vcaps_out
- )
- self.log.debug('Creating Output-Pipeline:\n%s', pipeline)
- self.outputPipeline = Gst.parse_launch(pipeline)
- self.outputPipeline.use_clock(Clock)
- self.log.debug('Binding Error & End-of-Stream-Signal on Output-Pipeline')
- self.outputPipeline.bus.add_signal_watch()
- self.outputPipeline.bus.connect("message::eos", self.on_eos)
- self.outputPipeline.bus.connect("message::error", self.on_error)
- self.log.debug('Launching Output-Pipeline')
- self.outputPipeline.set_state(Gst.State.PLAYING)
- def on_accepted(self, conn, addr):
- self.log.debug('Adding fd %u to multifdsink', conn.fileno())
- fdsink = self.outputPipeline.get_by_name('fd')
- fdsink.emit('add', conn.fileno())
- def on_disconnect(multifdsink, fileno):
- if fileno == conn.fileno():
- self.log.debug('fd %u removed from multifdsink', fileno)
- self.close_connection(conn)
- fdsink.connect('client-fd-removed', on_disconnect)
- def on_eos(self, bus, message):
- self.log.debug('Received End-of-Stream-Signal on Output-Pipeline')
- def on_error(self, bus, message):
- self.log.debug('Received Error-Signal on Output-Pipeline')
- (error, debug) = message.parse_error()
- self.log.debug('Error-Details: #%u: %s', error.code, debug)
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