import logging from gi.repository import Gst from enum import Enum, unique from lib.config import Config from lib.clock import Clock @unique class CompositeModes(Enum): fullscreen = 0 side_by_side_equal = 1 side_by_side_preview = 2 picture_in_picture = 3 class PadState(object): def __init__(self): self.reset() def reset(self): self.alpha = 1.0 self.xpos = 0 self.ypos = 0 self.zorder = 1 self.width = 0 self.height = 0 class VideoMix(object): log = logging.getLogger('VideoMix') def __init__(self): self.caps = Config.get('mix', 'videocaps') self.names = Config.getlist('mix', 'sources') self.log.info('Configuring Mixer for %u Sources', len(self.names)) pipeline = """ compositor name=mix ! {caps} ! identity name=sig ! queue ! tee name=tee intervideosrc channel=video_background ! {caps} ! mix. tee. ! queue ! intervideosink channel=video_mix_out """.format( caps=self.caps ) if Config.getboolean('previews', 'enabled'): pipeline += """ tee. ! queue ! intervideosink channel=video_mix_preview """ if Config.getboolean('stream-blanker', 'enabled'): pipeline += """ tee. ! queue ! intervideosink channel=video_mix_streamblanker """ for idx, name in enumerate(self.names): pipeline += """ intervideosrc channel=video_{name}_mixer ! {caps} ! mix. """.format( name=name, caps=self.caps, idx=idx ) self.log.debug('Creating Mixing-Pipeline:\n%s', pipeline) self.mixingPipeline = Gst.parse_launch(pipeline) self.mixingPipeline.use_clock(Clock) self.log.debug('Binding Error & End-of-Stream-Signal on Mixing-Pipeline') self.mixingPipeline.bus.add_signal_watch() self.mixingPipeline.bus.connect("message::eos", self.on_eos) self.mixingPipeline.bus.connect("message::error", self.on_error) self.log.debug('Binding Handoff-Handler for Synchronus mixer manipulation') sig = self.mixingPipeline.get_by_name('sig') sig.connect('handoff', self.on_handoff) self.padStateDirty = False self.padState = list() for idx, name in enumerate(self.names): self.padState.append(PadState()) self.log.debug('Initializing Mixer-State') self.compositeMode = CompositeModes.fullscreen self.sourceA = 0 self.sourceB = 1 self.recalculateMixerState() self.applyMixerState() bgMixerpad = self.mixingPipeline.get_by_name('mix').get_static_pad('sink_0') bgMixerpad.set_property('zorder', 0) self.log.debug('Launching Mixing-Pipeline') self.mixingPipeline.set_state(Gst.State.PLAYING) def getInputVideoSize(self): caps = Gst.Caps.from_string(self.caps) struct = caps.get_structure(0) _, width = struct.get_int('width') _, height = struct.get_int('height') return width, height def recalculateMixerState(self): if self.compositeMode == CompositeModes.fullscreen: self.recalculateMixerStateFullscreen() elif self.compositeMode == CompositeModes.side_by_side_equal: self.recalculateMixerStateSideBySideEqual() elif self.compositeMode == CompositeModes.side_by_side_preview: self.recalculateMixerStateSideBySidePreview() elif self.compositeMode == CompositeModes.picture_in_picture: self.recalculateMixerStatePictureInPicture() self.log.debug('Marking Pad-State as Dirty') self.padStateDirty = True def recalculateMixerStateFullscreen(self): self.log.info('Updating Mixer-State for Fullscreen-Composition') for idx, name in enumerate(self.names): pad = self.padState[idx] pad.reset() pad.alpha = float(idx == self.sourceA) def recalculateMixerStateSideBySideEqual(self): self.log.info('Updating Mixer-State for Side-by-side-Equal-Composition') width, height = self.getInputVideoSize() self.log.debug('Video-Size parsed as %ux%u', width, height) try: gutter = Config.getint('side-by-side-equal', 'gutter') self.log.debug('Gutter configured to %u', gutter) except: gutter = int(width / 100) self.log.debug('Gutter calculated to %u', gutter) targetWidth = int((width - gutter) / 2) targetHeight = int(targetWidth / width * height) try: y = Config.getint('side-by-side-equal', 'ypos') self.log.debug('Y-Pos configured to %u', y) except: y = (height - targetHeight) / 2 self.log.debug('Y-Pos calculated to %u', y) xa = 0 xb = width - targetWidth for idx, name in enumerate(self.names): pad = self.padState[idx] pad.reset() pad.ypos = y pad.width = targetWidth pad.height = targetHeight if idx == self.sourceA: pad.xpos = xa pad.zorder = 1 elif idx == self.sourceB: pad.xpos = xb pad.zorder = 2 else: pad.alpha = 0 def recalculateMixerStateSideBySidePreview(self): self.log.info('Updating Mixer-State for Side-by-side-Preview-Composition') width, height = self.getInputVideoSize() self.log.debug('Video-Size parsed as %ux%u', width, height) try: asize = [int(i) for i in Config.get('side-by-side-preview', 'asize').split('x', 1)] self.log.debug('A-Video-Size configured to %ux%u', asize[0], asize[1]) except: asize = [ int(width / 1.25), # 80% int(height / 1.25) # 80% ] self.log.debug('A-Video-Size calculated to %ux%u', asize[0], asize[1]) try: apos = [int(i) for i in Config.get('side-by-side-preview', 'apos').split('/', 1)] self.log.debug('B-Video-Position configured to %u/%u', apos[0], apos[1]) except: apos = [ int(width / 100), # 1% int(width / 100) # 1% ] self.log.debug('B-Video-Position calculated to %u/%u', apos[0], apos[1]) try: bsize = [int(i) for i in Config.get('side-by-side-preview', 'bsize').split('x', 1)] self.log.debug('B-Video-Size configured to %ux%u', bsize[0], bsize[1]) except: bsize = [ int(width / 4), # 25% int(height / 4) # 25% ] self.log.debug('B-Video-Size calculated to %ux%u', bsize[0], bsize[1]) try: bpos = [int(i) for i in Config.get('side-by-side-preview', 'bpos').split('/', 1)] self.log.debug('B-Video-Position configured to %u/%u', bpos[0], bpos[1]) except: bpos = [ width - int(width / 100) - bsize[0], height - int(width / 100) - bsize[1] # 1% ] self.log.debug('B-Video-Position calculated to %u/%u', bpos[0], bpos[1]) for idx, name in enumerate(self.names): pad = self.padState[idx] pad.reset() if idx == self.sourceA: pad.xpos, pad.ypos = apos pad.width, pad.height = asize pad.zorder = 1 elif idx == self.sourceB: pad.xpos, pad.ypos = bpos pad.width, pad.height = bsize pad.zorder = 2 else: pad.alpha = 0 def recalculateMixerStatePictureInPicture(self): self.log.info('Updating Mixer-State for Picture-in-Picture-Composition') width, height = self.getInputVideoSize() self.log.debug('Video-Size parsed as %ux%u', width, height) try: pipsize = [int(i) for i in Config.get('picture-in-picture', 'pipsize').split('x', 1)] self.log.debug('PIP-Size configured to %ux%u', pipsize[0], pipsize[1]) except: pipsize = [ int(width / 4), # 25% int(height / 4) # 25% ] self.log.debug('PIP-Size calculated to %ux%u', pipsize[0], pipsize[1]) try: pippos = [int(i) for i in Config.get('picture-in-picture', 'pippos').split('/', 1)] self.log.debug('PIP-Position configured to %u/%u', pippos[0], pippos[1]) except: pippos = [ width - pipsize[0] - int(width / 100), # 1% height - pipsize[1] -int(width / 100) # 1% ] self.log.debug('PIP-Position calculated to %u/%u', pippos[0], pippos[1]) for idx, name in enumerate(self.names): pad = self.padState[idx] pad.reset() if idx == self.sourceA: pass elif idx == self.sourceB: pad.xpos, pad.ypos = pippos pad.width, pad.height = pipsize pad.zorder = 2 else: pad.alpha = 0 def applyMixerState(self): for idx, state in enumerate(self.padState): # mixerpad 0 = background mixerpad = self.mixingPipeline.get_by_name('mix').get_static_pad('sink_%u' % (idx+1)) self.log.debug('Reconfiguring Mixerpad %u to x/y=%u/%u, w/h=%u/%u alpha=%0.2f, zorder=%u', \ idx, state.xpos, state.ypos, state.width, state.height, state.alpha, state.zorder) mixerpad.set_property('xpos', state.xpos) mixerpad.set_property('ypos', state.ypos) mixerpad.set_property('width', state.width) mixerpad.set_property('height', state.height) mixerpad.set_property('alpha', state.alpha) mixerpad.set_property('zorder', state.zorder) def on_handoff(self, object, buffer): if self.padStateDirty: self.padStateDirty = False self.log.debug('[Streaming-Thread]: Pad-State is Dirty, applying new Mixer-State') self.applyMixerState() def on_eos(self, bus, message): self.log.debug('Received End-of-Stream-Signal on Mixing-Pipeline') def on_error(self, bus, message): self.log.debug('Received Error-Signal on Mixing-Pipeline') (error, debug) = message.parse_error() self.log.debug('Error-Details: #%u: %s', error.code, debug) def setVideoSourceA(self, source): # swap if required if self.sourceB == source: self.sourceB = self.sourceA self.sourceA = source self.recalculateMixerState() def getVideoSourceA(self): return self.sourceA def setVideoSourceB(self, source): # swap if required if self.sourceA == source: self.sourceA = self.sourceB self.sourceB = source self.recalculateMixerState() def getVideoSourceB(self): return self.sourceB def setCompositeMode(self, mode): self.compositeMode = mode self.recalculateMixerState() def getCompositeMode(self): return self.compositeMode