From 9bfcbeea97f62b39d8bcc0134117e7f056caa91b Mon Sep 17 00:00:00 2001
From: John-Mark Gurney <jmg@funkthat.com>
Date: Thu, 24 Dec 2009 15:10:08 -0800
Subject: [PATCH] when we are doing producing, also notify that we are
 finished...

disable a bunch of debugging print's...

document why we need to keep a pauseProducing, bug in twisted...

[git-p4: depot-paths = "//depot/": change = 1423]
---
 audioraw.py | 37 +++++++++++++++++++++++++------------
 1 file changed, 25 insertions(+), 12 deletions(-)

diff --git a/audioraw.py b/audioraw.py
index 46b6fdb..dc7c518 100644
--- a/audioraw.py
+++ b/audioraw.py
@@ -1,5 +1,6 @@
 #!/usr/bin/env python
 # Copyright 2009 John-Mark Gurney <jmg@funkthat.com>
+
 '''Audio Raw Converter'''
 
 from DIDLLite import AudioItem, Album, Resource, ResourceList
@@ -38,17 +39,25 @@ class DecoderProducer:
 	implements(IPullProducer)
 
 	def __init__(self, consumer, decoder, tbytes, skipbytes):
+		'''skipbytes should always be small.  It is here in case
+		someone requests the middle of a sample.'''
+
 		self.decoder = decoder
 		self.consumer = consumer
 		self.tbytes = tbytes
 		self.skipbytes = skipbytes
+		#print 'DPregP', `self`, `self.tbytes`, `self.skipbytes`
 		consumer.registerProducer(self, False)
+		self.resumeProducing()
 
 	def pauseProducing(self):
-		print 'DPpP, doing nothing'
+		# XXX - bug in Twisted 8.2.0 on pipelined requests this is
+		# called: http://twistedmatrix.com/trac/ticket/3919
+		pass
 
 	def resumeProducing(self):
-		r = self.decoder.read(8*1024)
+		#print 'DPrP', `self`
+		r = self.decoder.read(oneblk=True)
 		if r:
 			#print 'DPrP:', len(r)
 			if self.skipbytes:
@@ -60,16 +69,19 @@ class DecoderProducer:
 			r = r[:send]
 			self.tbytes -= len(r)
 			self.consumer.write(r)
+			#print 'write %d bytes, remaining %d' % (len(r), self.tbytes)
 			if self.tbytes:
 				return
 
-		print 'DPurP'
+		#print 'DPurP', `self`
 		self.consumer.unregisterProducer()
+		self.consumer.finish()
 
 	def stopProducing(self):
-		print 'DPsP'
+		#print 'DPsP', `self`
 		self.decoder.close()
 		self.decoder = None
+		self.consumer = None
 
 class AudioResource(resource.Resource):
 	isLeaf = True
@@ -95,6 +107,7 @@ class AudioResource(resource.Resource):
 		return start, end - start + 1
 
 	def render(self, request):
+		#print 'render:', `request`
 		decoder = self.dec(self.f)
 		request.setHeader('content-type', makemtfromdec(decoder))
 		bytespersample = decoder.channels * decoder.bitspersample / 8
@@ -105,15 +118,15 @@ class AudioResource(resource.Resource):
 		request.setHeader('accept-ranges', 'bytes')
 
 		if request.requestHeaders.hasHeader('range'):
-			print 'range req:', `request.requestHeaders.getRawHeaders('range')`
+			#print 'range req:', `request.requestHeaders.getRawHeaders('range')`
 			start, cnt = self.calcrange(
 			    request.requestHeaders.getRawHeaders('range')[0],
 			    tbytes)
 			skipbytes = start % bytespersample
 
-			print 'going:', start / bytespersample
+			#print 'going:', start / bytespersample
 			decoder.goto(self.start + start / bytespersample)
-			print 'there'
+			#print 'there'
 
 			request.setHeader('content-length', cnt)
 			request.setHeader('content-range', 'bytes %s-%s/%s' %
@@ -126,7 +139,7 @@ class AudioResource(resource.Resource):
 			return ''
 
 		DecoderProducer(request, decoder, tbytes, skipbytes)
-		print 'producing render'
+		#print 'producing render', `decoder`, `tbytes`, `skipbytes`
 
 		# and make sure the connection doesn't get closed
 		return server.NOT_DONE_YET
@@ -149,10 +162,10 @@ class AudioDisc(FSObject, Album):
 		# XXX - exclude track 1 pre-gap?
 		kwargs['content'] = AudioResource(self.file,
 		    kwargs.pop('decoder'), 0, kwargs['samples'])
-		print 'doing construction'
+		#print 'doing construction'
 		Album.__init__(self, *args, **kwargs)
 
-		print 'adding resource'
+		#print 'adding resource'
 		self.url = '%s/%s' % (self.cd.urlbase, self.id)
 		self.res = ResourceList()
 		r = Resource(self.url, 'http-get:*:%s:*' % makeaudiomt(bitsps,
@@ -164,7 +177,7 @@ class AudioDisc(FSObject, Album):
 		r.bitsPerSample = bitsps
 		r.nrAudioChannels = nchan
 		self.res.append(r)
-		print 'completed'
+		#print 'completed'
 
 	def sort(self, fun=lambda x, y: cmp(int(x.title), int(y.title))):
 		return list.sort(self, fun)
@@ -173,7 +186,7 @@ class AudioDisc(FSObject, Album):
 		r = [ str(x['number']) for x in
 		    self.cuesheet['tracks_array'] if x['number'] not in
 		    (170, 255) ]
-		print 'gC:', `r`
+		#print 'gC:', `r`
 		return r
 
 	def findtrackidx(self, trk):