From 1c425ec2eeb78085939c0c93f2a69c8a73e709b9 Mon Sep 17 00:00:00 2001
From: MaZderMind <github@mazdermind.de>
Date: Wed, 30 Jul 2014 00:34:14 +0200
Subject: add a distributor piping into two different mixes, start placing
 videos in quadmix

---
 voctocore/videomix.py | 48 ++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 42 insertions(+), 6 deletions(-)

(limited to 'voctocore/videomix.py')

diff --git a/voctocore/videomix.py b/voctocore/videomix.py
index e67a7b1..8cc3cb9 100644
--- a/voctocore/videomix.py
+++ b/voctocore/videomix.py
@@ -1,4 +1,4 @@
-import sys, inspect
+import sys, inspect, math
 from pprint import pprint
 from gi.repository import GLib, Gst
 
@@ -11,15 +11,27 @@ class Videomix:
 
 		# create audio and video mixer
 		mixerbin = self.createMixer()
-		self.pipeline.add(mixerbin)
+
+		# collection of video-sources to connect to the quadmix
+		quadmixSources = []
 
 		# create camera sources
 		for camberabin in self.createDummyCamSources():
-			# link camerasource to the mixers
-			self.pipeline.add(camberabin)
-			camberabin.get_by_name('video_src').link(self.pipeline.get_by_name('livevideo'))
+			# link camerasource to audiomixer
 			camberabin.get_by_name('audio_src').link(self.pipeline.get_by_name('liveaudio'))
 
+			# inject a ×2 distributor and link one end to the live-mixer
+			distributor = self.createDistributor(camberabin.get_by_name('video_src'))
+			distributor.get_by_name('a').link(self.pipeline.get_by_name('livevideo'))
+
+			# collect the other end to add it later to the quadmix
+			quadmixSources.append(distributor.get_by_name('b'))
+
+		# would generate pause & slides with another generator which only
+		# yields if the respective fil are there and which only have a video-pad
+
+		self.addVideosToQuadmix(quadmixSources, self.pipeline.get_by_name('quadmix'))
+
 		# demonstrate some control
 		liveaudio = self.pipeline.get_by_name('liveaudio')
 		liveaudio.set_property('active-pad', liveaudio.get_static_pad('sink_0'))
@@ -31,11 +43,33 @@ class Videomix:
 		self.pipeline.set_state(Gst.State.PLAYING)
 
 	def createMixer(self):
-		return Gst.parse_bin_from_description("""
+		mixerbin = Gst.parse_bin_from_description("""
 			videomixer name=livevideo ! autovideosink
 			input-selector name=liveaudio ! autoaudiosink
+
+			videomixer name=quadmix ! autovideosink
+		""", False)
+		self.pipeline.add(mixerbin)
+		return mixerbin
+
+	def addVideosToQuadmix(self, videosources, quadmix):
+		count = len(videosources)
+		rows = math.ceil(math.sqrt(count))
+		cols = math.ceil(count / rows)
+		for videosource in videosources:
+			# define size somewhere, scale and place here
+			videosource.link(quadmix)
+
+	def createDistributor(self, videosource):
+		distributor = Gst.parse_bin_from_description("""
+			tee name=t
+			t. ! queue name=a
+			t. ! queue name=b
 		""", False)
 
+		self.pipeline.add(distributor)
+		videosource.link(distributor.get_by_name('t'))
+		return distributor
 
 	def createDummyCamSources(self):
 		uris = ('file:///home/peter/122.mp4', 'file:///home/peter/10025.mp4',)
@@ -51,6 +85,7 @@ class Videomix:
 			camberabin.get_by_name('input').set_property('uri', uri)
 
 			# pass bin upstream
+			self.pipeline.add(camberabin)
 			yield camberabin
 
 
@@ -68,4 +103,5 @@ class Videomix:
 			camberabin.get_by_name('input').set_property('subdevice', cam)
 
 			# pass bin upstream
+			self.pipeline.add(camberabin)
 			yield camberabin
-- 
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