add new clip module... document it and the addition of item...

document DMC-250 and add it to the QA check list...

[git-p4: depot-paths = "//depot/": change = 1347]

Clip.py

@@ -0,0 +1,115 @@
+#!/usr/bin/env python
+# Copyright 2009 John-Mark Gurney <jmg@funkthat.com>
+'''MPEG-TS clip'''
+
+__version__ = '$Change: 1308 $'
+# $Id: //depot/python/pymeds/main/shoutcast.py#22 $
+
+import bisect
+import email
+import os.path
+
+from DIDLLite import VideoItem, Resource
+from FSStorage import registerklassfun
+
+from twisted.web import static
+
+class ClipProxyFile:
+	def __init__(self, f, p):
+		self.fp = open(f)
+		self.p = p
+		self.pos = 0
+		lp = p[-1]
+		self.size = lp[0] + lp[1]
+
+	def read(self, s=None):
+		if s is None:
+			s = self.size - self.pos
+
+		p = bisect.bisect_right(self.p, (self.pos,))
+		if p > 0:
+			p -= 1
+		# We might be able to do this with proper construction of
+		# self.p, but this is easier.
+		r = []
+		fp = self.fp
+		records = iter(self.p[p:])
+		while s:
+			rec = records.next()
+			diff = self.pos - rec[0]
+			rlen = min(s, rec[1] - diff)
+			fp.seek(rec[2] + diff)
+			r.append(fp.read(rlen))
+			s -= rlen
+			self.pos += rlen
+
+		return ''.join(r)
+
+	def close(self):
+		self.fp.close()
+
+	def seek(self, p, d=0):
+		assert d == 0
+		self.pos = p
+		if self.pos > self.size:
+			self.pos = self.size
+
+	def tell(self):
+		return self.pos
+
+class ClipProxy(static.File):
+	isLeaf = True
+
+	synchronized = [ 'parsefile', 'getsize', 'open' ]
+
+	def __init__(self, f, *args):
+		self.__mtime = None
+		static.File.__init__(self, f, *args)
+		self.parsefile(self.path)
+
+	def parsefile(self, f):
+		if self.getModificationTime() == self.__mtime:
+			return
+
+		self.__mtime = self.getModificationTime()
+		i = email.message_from_file(open(f))
+		self.origfile = i['file']
+		self.date = eval(i['datetuple'], { '__builtins__': {} })
+		# date is UTC
+		p = [ map(int, x.split()) for x in i.get_payload().split('\n') if x ]
+		pos = 0
+		self.pos = par = []
+		for j in p:
+			l = j[1] - j[0] + 188
+			par.append((pos, l, j[0]))
+			pos += l
+		self.__size = pos
+
+	def getsize(self):
+		return self.__size
+
+	def open(self):
+		return ClipProxyFile(self.origfile, self.pos)
+
+	def restat(self):
+		static.File.restat(self)
+		self.parsefile(self.path)
+
+class ClipFile(VideoItem):
+	def __init__(self, *args, **kwargs):
+		file = kwargs.pop('file')
+		mimetype = 'video/mpeg'
+		kwargs['content'] = ClipProxy(file, mimetype)
+		VideoItem.__init__(self, *args, **kwargs)
+		self.url = '%s/%s' % (self.cd.urlbase, self.id)
+		self.res = Resource(self.url, 'http-get:*:%s:*' % mimetype)
+
+def detectclipfile(origpath, fobj):
+	path = os.path.basename(origpath)
+	ext = os.path.splitext(path)[1]
+	if ext == '.clip':
+		return ClipFile, { 'file': origpath }
+
+	return None, None
+
+registerklassfun(detectclipfile)

QACheckList

@@ -1,7 +1,7 @@
 General Functionality
 error w/o media dir	
 
-			PS3	DSM-520	Cidero	Intel
+			PS3	DSM-520	Cidero	Intel	DMC-250
 Discovered					
 remains after 30m				
 FSStorage
@@ -12,3 +12,5 @@ mpegtsmod
 shoutcast
 dvd
 pyvr
+Clip
+item

README

@@ -14,6 +14,7 @@ Tested basic functionality with the following devices and/or programs:
 	Intel's Media Control Point and Media Renderer
 	D-Link DSM-520
 	Sony PlayStation 3
+	Linksys DMC-250
 
 The Intel tools are good for testing (though Windows only) and are
 available at:
@@ -82,7 +83,7 @@ v0.x:
 	Ignore AppleDouble Resource Fork Files.  (Maybe we should ignore all
 	  dot files.)
 	Readded SOAPpy/fpconst requirement as it is necessary for twisted.
-	Made it a bit closer to a real twisted proejct, in the process,
+	Made it a bit closer to a real twisted project, in the process,
 	  pymediaserv looks more like a normal program.  It allows you to
 	  override the media path and title of the server.
 	Minor change to checkUpdate API, we didn't use the return value, so
@@ -91,6 +92,11 @@ v0.x:
 	  This means that you can support streaming radio stations that
 	  provides a .pls file such as KCSM 91.1.
 	Fix ShoutCast error handling to be correct.
+	Add support for an XML file containing an object so you can create
+	  an item that points to an mp3 streaming url that isn't a .pls.
+	Add support for playing parts of TS streams.  This is useful for
+	  splitting apart a TS stream w/ multiple clips (like HDV) w/o
+	  creating the files.
 
 v0.5:
 	Support multiple SSDP servers on the same box.

pymeds.py

@@ -3,7 +3,7 @@
 # Licensed under the MIT license
 # http://opensource.org/licenses/mit-license.php
 # Copyright 2005, Tim Potter <tpot@samba.org>
-# Copyright 2006 John-Mark Gurney <jmg@funkthat.com>
+# Copyright 2006-2009 John-Mark Gurney <jmg@funkthat.com>
 
 __version__ = '$Change$'
 # $Id$
@@ -29,6 +29,7 @@ def tryloadmodule(mod):
 # mpegtsmod can be really expensive.
 modules = [
 	'shoutcast',
+	'Clip',
 	'pyvr',
 	'item',
 	'dvd',