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 = """ intervideosrc channel=video_{channel} ! {vcaps_in} ! videorate ! videoscale method=nearest-neighbour ! {vcaps_out} ! jpegenc ! queue ! mux. interaudiosrc channel=audio_{channel} ! {acaps} ! queue ! mux. matroskamux name=mux streamable=true writing-app=Voctomix-AVPreviewOutput ! multifdsink blocksize=1048576 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)