update singledecodebin to latest version from pitivi
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4 changed files with 241 additions and 101 deletions
7
README
7
README
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@ -1,4 +1,9 @@
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oxgt-tools
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oxtools
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depends on gstreamer 0.10.30 or newer
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on ubuntu 10.04 you need
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sudo add-apt-repository ppa:gstreamer-developers/ppa
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Tools
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oxframe
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@ -9,9 +9,6 @@ pygst.require("0.10")
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import gst
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import Image
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from singledecodebin import SingleDecodeBin
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class ImageSink(gst.BaseSink):
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__gsignals__ = {
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@ -28,6 +28,38 @@ Single-stream queue-less decodebin
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import gobject
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import gst
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class CachedFactoryList(object):
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def __init__(self, factoryFilter=None):
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self._factoryFilter = factoryFilter
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self._factories = None
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self._registry = gst.registry_get_default()
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self._registry.connect("feature-added", self._registryFeatureAddedCb)
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def get(self):
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if self._factories is None:
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self._buildFactories()
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return self._factories
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def _buildFactories(self):
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# build the cache
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#log.debug("utils", "Getting factories list")
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factories = self._registry.get_feature_list(gst.ElementFactory)
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if self._factoryFilter is not None:
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#log.debug("utils", "filtering")
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factories = filter(self._factoryFilter, factories)
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#log.debug("utils", "Sorting by rank")
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factories.sort(key=lambda factory: factory.get_rank(), reverse=True)
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self._factories = factories
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#log.debug("utils", "Cached factories is now %r", self._factories)
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def _registryFeatureAddedCb(self, registry, feature):
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# invalidate the cache
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#log.warning("utils", "New feature added, invalidating cached factories")
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self._factories = None
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def is_raw(caps):
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""" returns True if the caps are RAW """
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rep = caps.to_string()
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@ -37,7 +69,28 @@ def is_raw(caps):
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return True
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return False
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def factoryFilter(factory):
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if factory.get_rank() < 64 :
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return False
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klass = factory.get_klass()
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for cat in ("Demuxer", "Decoder", "Parse"):
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if cat in klass:
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return True
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return False
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_factoryCache = CachedFactoryList(factoryFilter)
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class SingleDecodeBin(gst.Bin):
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"""
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A variant of decodebin.
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* Only outputs one stream
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* Doesn't contain any internal queue
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"""
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QUEUE_SIZE = 1 * gst.SECOND
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__gsttemplates__ = (
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gst.PadTemplate ("sinkpadtemplate",
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@ -49,11 +102,13 @@ class SingleDecodeBin(gst.Bin):
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gst.PAD_SOMETIMES,
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gst.caps_new_any())
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)
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def __init__(self, caps=None, uri=None, *args, **kwargs):
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def __init__(self, caps=None, uri=None, stream=None, *args, **kwargs):
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gst.Bin.__init__(self, *args, **kwargs)
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if not caps:
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caps = gst.caps_new_any()
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self.caps = caps
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self.stream = stream
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self.typefind = gst.element_factory_make("typefind", "internal-typefind")
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self.add(self.typefind)
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@ -63,7 +118,11 @@ class SingleDecodeBin(gst.Bin):
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self.log("created urisrc %s / %r" % (self.urisrc.get_name(),
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self.urisrc))
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self.add(self.urisrc)
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self.urisrc.link(self.typefind)
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# Set the blocksize to 512kbytes, this will only matter for push-based sources
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if hasattr(self.urisrc.props, "blocksize"):
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self.urisrc.props.blocksize = 524288
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self.urisrc.link_pads_full("src", self.typefind, "sink",
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gst.PAD_LINK_CHECK_NOTHING)
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else:
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self._sinkpad = gst.GhostPad("sink", self.typefind.get_pad("sink"))
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self._sinkpad.set_active(True)
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@ -77,8 +136,10 @@ class SingleDecodeBin(gst.Bin):
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self._validelements = [] #added elements
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self._factories = self._getSortedFactoryList()
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self.debug("stream:%r" % self.stream)
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self.pending_newsegment = False
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self.eventProbeId = None
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## internal methods
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@ -88,23 +149,6 @@ class SingleDecodeBin(gst.Bin):
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element.connect("pad-added", self._dynamicPadAddedCb)
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element.connect("no-more-pads", self._dynamicNoMorePadsCb)
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def _getSortedFactoryList(self):
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"""
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Returns the list of demuxers, decoders and parsers available, sorted
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by rank
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"""
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def myfilter(fact):
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if fact.get_rank() < 64 :
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return False
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klass = fact.get_klass()
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if not ("Demuxer" in klass or "Decoder" in klass or "Parse" in klass):
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return False
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return True
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reg = gst.registry_get_default()
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res = [x for x in reg.get_feature_list(gst.ElementFactory) if myfilter(x)]
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res.sort(lambda a, b: int(b.get_rank() - a.get_rank()))
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return res
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def _findCompatibleFactory(self, caps):
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"""
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Returns a list of factories (sorted by rank) which can take caps as
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@ -112,7 +156,7 @@ class SingleDecodeBin(gst.Bin):
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"""
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self.debug("caps:%s" % caps.to_string())
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res = []
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for factory in self._factories:
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for factory in _factoryCache.get():
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for template in factory.get_static_pad_templates():
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if template.direction == gst.PAD_SINK:
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intersect = caps.intersect(template.static_caps.get())
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@ -153,6 +197,35 @@ class SingleDecodeBin(gst.Bin):
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for pad in to_connect:
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self._closePadLink(element, pad, pad.get_caps())
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def _isDemuxer(self, element):
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if not 'Demux' in element.get_factory().get_klass():
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return False
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potential_src_pads = 0
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for template in element.get_pad_template_list():
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if template.direction != gst.PAD_SRC:
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continue
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if template.presence == gst.PAD_REQUEST or \
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"%" in template.name_template:
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potential_src_pads += 2
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break
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else:
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potential_src_pads += 1
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return potential_src_pads > 1
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def _plugDecodingQueue(self, pad):
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queue = gst.element_factory_make("queue")
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queue.props.max_size_time = self.QUEUE_SIZE
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queue.props.max_size_buffers = 3
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self.add(queue)
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queue.sync_state_with_parent()
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pad.link_full(queue.get_pad("sink"), gst.PAD_LINK_CHECK_NOTHING)
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pad = queue.get_pad("src")
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return pad
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def _tryToLink1(self, source, pad, factories):
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"""
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Tries to link one of the factories' element to the given pad.
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@ -162,6 +235,10 @@ class SingleDecodeBin(gst.Bin):
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self.debug("source:%s, pad:%s , factories:%r" % (source.get_name(),
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pad.get_name(),
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factories))
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if self._isDemuxer(source):
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pad = self._plugDecodingQueue(pad)
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result = None
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for factory in factories:
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element = factory.create()
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@ -174,6 +251,7 @@ class SingleDecodeBin(gst.Bin):
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continue
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self.add(element)
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element.set_state(gst.STATE_READY)
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try:
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pad.link(sinkpad)
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except:
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@ -204,10 +282,17 @@ class SingleDecodeBin(gst.Bin):
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if caps.is_any():
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self.log("type is not know yet, waiting")
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return
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if caps.intersect(self.caps):
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self.debug("stream %r" % (self.stream))
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if caps.intersect(self.caps) and (self.stream is None or
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(self.stream.pad_name == get_pad_id(pad))):
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# This is the desired caps
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if not self._srcpad:
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self._wrapUp(element, pad)
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elif is_raw(caps) and pad_compatible_stream(pad, self.stream):
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self.log ("not the target stream, but compatible")
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if not self._srcpad:
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self._wrapUp(element, pad)
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elif is_raw(caps):
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self.log("We hit a raw caps which isn't the wanted one")
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# FIXME : recursively remove everything until demux/typefind
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@ -232,13 +317,64 @@ class SingleDecodeBin(gst.Bin):
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if self._srcpad:
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return
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self._markValidElements(element)
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self._removeUnusedElements(self.typefind)
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self.log("ghosting pad %s" % pad.get_name)
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gobject.idle_add(self._removeUnusedElements, self.typefind)
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if pad.props.caps is not None:
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caps = pad.props.caps
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else:
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caps = pad.get_caps()
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self._srcpad = gst.GhostPad("src", pad)
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self._srcpad.set_active(True)
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if caps.is_fixed():
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self._exposePad(target=pad)
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else:
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self._blockPad(target=pad)
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def _exposePad(self, target):
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self.log("ghosting pad %s" % target.get_name())
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self.add_pad(self._srcpad)
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self.post_message(gst.message_new_state_dirty(self))
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def _blockPad(self, target):
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# don't pass target as an argument to set_blocked_async. Avoids
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# triggering a bug in gst-python where pad_block_destroy_data calls
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# CPython without acquiring the GIL
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self._target = target
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self._eventProbeId = target.add_event_probe(self._padEventCb)
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self._srcpad.set_blocked_async(True, self._padBlockedCb)
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def _unblockPad(self, target):
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target.remove_event_probe(self._eventProbeId)
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self._eventProbeId = None
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self._srcpad.set_blocked_async(False, self._padBlockedCb)
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def _padBlockedCb(self, ghost, blocked):
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if not blocked:
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if self.pending_newsegment is not None:
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self._srcpad.push_event(self.pending_newsegment)
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self.pending_newsegment = None
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return
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self._exposePad(target=self._target)
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self._unblockPad(target=self._target)
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def _padEventCb(self, pad, event):
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if event.type == gst.EVENT_TAG:
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self.debug("dropping TAG event")
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return False
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if event.type != gst.EVENT_NEWSEGMENT:
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self.warning("first event: %s is not a NEWSEGMENT, bailing out" %
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event)
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self._exposePad(target=pad)
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self._unblockPad(target=pad)
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return True
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self.debug("stored pending newsegment")
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self.pending_newsegment = event
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return False
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def _markValidElements(self, element):
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"""
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Mark this element and upstreams as valid
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@ -256,22 +392,24 @@ class SingleDecodeBin(gst.Bin):
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"""
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Remove unused elements connected to srcpad(s) of element
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"""
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self.log("element:%s" % element)
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for pad in element.src_pads():
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self.log("element:%r" % element)
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for pad in list(element.src_pads()):
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if pad.is_linked():
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peer = pad.get_peer().get_parent()
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self._removeUnusedElements(peer)
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if not peer in self._validelements:
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self.log("removing %s" % peer.get_name())
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pad.unlink(pad.get_peer())
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peer.set_state(gst.STATE_NULL)
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self.remove(peer)
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if isinstance(peer, gst.Element):
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self._removeUnusedElements(peer)
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if not peer in self._validelements:
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self.log("removing %s" % peer.get_name())
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pad.unlink(pad.get_peer())
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peer.set_state(gst.STATE_NULL)
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self.remove(peer)
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def _cleanUp(self):
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self.log("")
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if self._srcpad:
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self.remove_pad(self._srcpad)
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self._srcpad = None
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self._target = None
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for element in self._validelements:
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element.set_state(gst.STATE_NULL)
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self.remove(element)
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@ -282,7 +420,7 @@ class SingleDecodeBin(gst.Bin):
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def do_change_state(self, transition):
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self.debug("transition:%r" % transition)
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res = gst.Bin.do_change_state(self, transition)
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if transition in [gst.STATE_CHANGE_PAUSED_TO_READY, gst.STATE_CHANGE_READY_TO_NULL]:
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if transition == gst.STATE_CHANGE_PAUSED_TO_READY:
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self._cleanUp()
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return res
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