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examples/gstfile.py: Moved the Discoverer class to gst.extend
Original commit message from CVS: * examples/gstfile.py: Moved the Discoverer class to gst.extend Now works asynchronous... bl**dy fast :) * gst/extend/Makefile.am: * gst/extend/discoverer.py: Discoverer has landed in extend and is now asynchronous. It emits a 'discovered' signal when it has finished.
This commit is contained in:
Edward Hervey
parent
ddf94ea8fa
commit
1e233d42c1
5 changed files with 344 additions and 248 deletions
10
ChangeLog
10
ChangeLog
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@ -1,3 +1,13 @@
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2005-12-12 Edward Hervey <edward@fluendo.com>
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* examples/gstfile.py:
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Moved the Discoverer class to gst.extend
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Now works asynchronous... bl**dy fast :)
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* gst/extend/Makefile.am:
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* gst/extend/discoverer.py:
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Discoverer has landed in extend and is now asynchronous.
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It emits a 'discovered' signal when it has finished.
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2005-12-09 Edward Hervey <edward@fluendo.com>
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2005-12-09 Edward Hervey <edward@fluendo.com>
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* gst/arg-types.py:
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* gst/arg-types.py:
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2
common
2
common
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@ -1 +1 @@
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Subproject commit fe94837afc0b10eaf867156fc29eea0073ba45df
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Subproject commit 4edc214072fe07d2aade96bc336493425654d7b4
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@ -19,266 +19,54 @@ import gobject
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import pygst
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import pygst
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pygst.require('0.10')
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pygst.require('0.10')
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import gst
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from gst.extend.discoverer import Discoverer
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def time_to_string(value):
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class GstFile:
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"""
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"""
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transform a value in nanoseconds into a human-readable string
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Analyses one or more files and prints out the multimedia information of
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each file.
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"""
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"""
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ms = value / gst.MSECOND
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sec = ms / 1000
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ms = ms % 1000
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min = sec / 60
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sec = sec % 60
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return "%2dm %2ds %3d" % (min, sec, ms)
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def __init__(self, files):
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self.files = files
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self.mainloop = gobject.MainLoop()
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self.current = None
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class Discoverer(gst.Pipeline):
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def run(self):
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"""
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gobject.idle_add(self._discover_one)
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Discovers information about files
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self.mainloop.run()
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"""
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mimetype = None
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audiocaps = {}
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def _discovered(self, discoverer, ismedia):
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videocaps = {}
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discoverer.print_info()
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self.current = None
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videowidth = 0
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if len(self.files):
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videoheight = 0
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print "\n"
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videorate = 0
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gobject.idle_add(self._discover_one)
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audiofloat = False
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audiorate = 0
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audiodepth = 0
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audiowidth = 0
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audiochannels = 0
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audiolength = 0L
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videolength = 0L
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is_video = False
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is_audio = False
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otherstreams = []
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finished = False
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tags = {}
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def __init__(self, filename):
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gobject.GObject.__init__(self)
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self.mimetype = None
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self.audiocaps = {}
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self.videocaps = {}
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self.videowidth = 0
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self.videoheight = 0
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self.videorate = 0
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self.audiofloat = False
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self.audiorate = 0
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self.audiodepth = 0
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self.audiowidth = 0
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self.audiochannels = 0
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self.audiolength = 0L
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self.videolength = 0L
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self.is_video = False
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self.is_audio = False
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self.otherstreams = []
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self.finished = False
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self.tags = {}
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def _discover_one(self):
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if not len(self.files):
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gobject.idle_add(self.mainloop.quit)
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return False
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filename = self.files.pop(0)
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if not os.path.isfile(filename):
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if not os.path.isfile(filename):
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self.finished = True
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gobject.idle_add(self._discover_one)
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return
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return False
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print "Running on", filename
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# the initial elements of the pipeline
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# create a discoverer for that file
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self.src = gst.element_factory_make("filesrc")
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self.current = Discoverer(filename)
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self.src.set_property("location", filename)
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# connect a callback on the 'discovered' signal
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self.src.set_property("blocksize", 1000000)
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self.current.connect('discovered', self._discovered)
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self.dbin = gst.element_factory_make("decodebin")
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# start the discovery
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self.add(self.src, self.dbin)
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self.current.discover()
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self.src.link(self.dbin)
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return False
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self.typefind = self.dbin.get_by_name("typefind")
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# callbacks
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self.typefind.connect("have-type", self._have_type_cb)
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self.dbin.connect("new-decoded-pad", self._new_decoded_pad_cb)
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self.dbin.connect("unknown-type", self._unknown_type_cb)
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self.discover()
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def discover(self):
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"""iterate on ourself to find the information on the given file"""
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if self.finished:
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return
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self.info("setting to PLAY")
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if not self.set_state(gst.STATE_PLAYING):
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# the pipeline wasn't able to be set to playing
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self.finished = True
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return
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bus = self.get_bus()
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while 1:
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if self.finished:
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self.debug("self.finished, stopping")
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break
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msg = bus.poll(gst.MESSAGE_ANY, gst.SECOND)
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if not msg:
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print "got empty message..."
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break
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if msg.type & gst.MESSAGE_STATE_CHANGED:
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pass
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elif msg.type & gst.MESSAGE_EOS:
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break
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elif msg.type & gst.MESSAGE_TAG:
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for key in msg.parse_tag().keys():
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self.tags[key] = msg.structure[key]
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elif msg.type & gst.MESSAGE_ERROR:
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print "whooops, error", msg.parse_error()
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break
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self.set_state(gst.STATE_PAUSED)
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self.set_state(gst.STATE_READY)
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self.finished = True
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def print_info(self):
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"""prints out the information on the given file"""
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if not self.finished:
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self.discover()
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if not self.mimetype:
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print "Unknown media type"
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return
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print "Mime Type :\t", self.mimetype
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if not self.is_video and not self.is_audio:
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return
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print "Length :\t", time_to_string(max(self.audiolength, self.videolength))
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print "\tAudio:", time_to_string(self.audiolength), "\tVideo:", time_to_string(self.videolength)
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if self.is_video:
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print "Video :"
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print "\t%d x %d @ %d/%d fps" % (self.videowidth,
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self.videoheight,
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self.videorate.num, self.videorate.denom)
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if self.tags.has_key("video-codec"):
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print "\tCodec :", self.tags.pop("video-codec")
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if self.is_audio:
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print "Audio :"
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if self.audiofloat:
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print "\t%d channels(s) : %dHz @ %dbits (float)" % (self.audiochannels,
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self.audiorate,
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self.audiowidth)
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else:
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print "\t%d channels(s) : %dHz @ %dbits (int)" % (self.audiochannels,
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self.audiorate,
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self.audiodepth)
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if self.tags.has_key("audio-codec"):
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print "\tCodec :", self.tags.pop("audio-codec")
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for stream in self.otherstreams:
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if not stream == self.mimetype:
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print "Other unsuported Multimedia stream :", stream
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if self.tags:
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print "Additional information :"
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for tag in self.tags.keys():
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print "%20s :\t" % tag, self.tags[tag]
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def _unknown_type_cb(self, dbin, pad, caps):
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print "unknown type", caps.to_string()
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# if we get an unknown type and we don't already have an
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# audio or video pad, we are finished !
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self.otherstreams.append(caps.to_string())
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if not self.is_video and not self.is_audio:
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self.finished = True
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def _have_type_cb(self, typefind, prob, caps):
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self.mimetype = caps.to_string()
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def _notify_caps_cb(self, pad, args):
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caps = pad.get_negotiated_caps()
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if not caps:
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return
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# the caps are fixed
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# We now get the total length of that stream
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q = gst.query_new_duration(gst.FORMAT_TIME)
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pad.info("sending position query")
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if pad.get_peer().query(q):
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format, length = q.parse_duration()
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pad.info("got position query answer : %d:%d" % (length, format))
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else:
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gst.warning("position query didn't work")
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# We store the caps and length in the proper location
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if "audio" in caps.to_string():
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self.audiocaps = caps
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self.audiolength = length
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self.audiorate = caps[0]["rate"]
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self.audiowidth = caps[0]["width"]
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self.audiochannels = caps[0]["channels"]
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if "x-raw-float" in caps.to_string():
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self.audiofloat = True
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else:
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self.audiodepth = caps[0]["depth"]
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if (not self.is_video) or self.videocaps:
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self.finished = True
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elif "video" in caps.to_string():
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self.videocaps = caps
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self.videolength = length
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self.videowidth = caps[0]["width"]
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self.videoheight = caps[0]["height"]
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self.videorate = caps[0]["framerate"]
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if (not self.is_audio) or self.audiocaps:
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self.finished = True
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def _new_decoded_pad_cb(self, dbin, pad, is_last):
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# Does the file contain got audio or video ?
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caps = pad.get_caps()
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gst.info("caps:%s" % caps.to_string())
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if "audio" in caps.to_string():
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self.is_audio = True
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elif "video" in caps.to_string():
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self.is_video = True
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else:
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print "got a different caps..", caps
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return
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if is_last and not self.is_video and not self.is_audio:
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self.finished = True
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return
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# we connect a fakesink to the new pad...
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pad.info("adding queue->fakesink")
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fakesink = gst.element_factory_make("fakesink")
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queue = gst.element_factory_make("queue")
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self.add(fakesink, queue)
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queue.link(fakesink)
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sinkpad = fakesink.get_pad("sink")
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queuepad = queue.get_pad("sink")
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# ... and connect a callback for when the caps are fixed
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sinkpad.connect("notify::caps", self._notify_caps_cb)
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if pad.link(queuepad):
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pad.warning("##### Couldn't link pad to queue")
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queue.set_state(gst.STATE_PLAYING)
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fakesink.set_state(gst.STATE_PLAYING)
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gst.info('finished here')
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def _found_tag_cb(self, dbin, source, tags):
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self.tags.update(tags)
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gobject.type_register(Discoverer)
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def main(args):
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def main(args):
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if len(args) < 2:
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if len(args) < 2:
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print 'usage: %s files...' % args[0]
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print 'usage: %s files...' % args[0]
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return 2
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return 2
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if len(args[1:]) > 1:
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gstfile = GstFile(args[1:])
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for filename in args[1:]:
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gstfile.run()
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print "File :", filename
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Discoverer(filename).print_info()
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print "\n"
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else:
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Discoverer(args[1]).print_info()
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if __name__ == '__main__':
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if __name__ == '__main__':
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sys.exit(main(sys.argv))
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sys.exit(main(sys.argv))
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@ -1,4 +1,4 @@
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pkgpythondir = $(pythondir)/gst-$(GST_MAJORMINOR)/gst/extend
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pkgpythondir = $(pythondir)/gst-$(GST_MAJORMINOR)/gst/extend
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pygstdir = $(pkgpythondir)
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pygstdir = $(pkgpythondir)
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pygst_PYTHON = __init__.py pygobject.py utils.py
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pygst_PYTHON = __init__.py pygobject.py utils.py discoverer.py
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298
gst/extend/discoverer.py
Normal file
298
gst/extend/discoverer.py
Normal file
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@ -0,0 +1,298 @@
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#!/usr/bin/env python
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# -*- Mode: Python -*-
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# vi:si:et:sw=4:sts=4:ts=4
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# discoverer.py
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# (c) 2005 Edward Hervey <edward at fluendo dot com>
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# Discovers multimedia information on files
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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"""
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Class and functions for getting multimedia information about files
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"""
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import gst
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import gobject
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import os.path
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from gst.extend.pygobject import gsignal
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class Discoverer(gst.Pipeline):
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"""
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Discovers information about files.
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This class is event-based and needs a mainloop to work properly.
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Emits the 'discovered' signal when discovery is finished.
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The 'discovered' callback has one boolean argument, which is True if the
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file contains decodable multimedia streams.
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"""
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__gsignals__ = {
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'discovered' : (gobject.SIGNAL_RUN_FIRST,
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None,
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(gobject.TYPE_BOOLEAN, ))
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}
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mimetype = None
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audiocaps = {}
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videocaps = {}
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videowidth = 0
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videoheight = 0
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videorate = 0
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audiofloat = False
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audiorate = 0
|
||||||
|
audiodepth = 0
|
||||||
|
audiowidth = 0
|
||||||
|
audiochannels = 0
|
||||||
|
|
||||||
|
audiolength = 0L
|
||||||
|
videolength = 0L
|
||||||
|
|
||||||
|
is_video = False
|
||||||
|
is_audio = False
|
||||||
|
|
||||||
|
otherstreams = []
|
||||||
|
|
||||||
|
finished = False
|
||||||
|
tags = {}
|
||||||
|
|
||||||
|
|
||||||
|
def __init__(self, filename):
|
||||||
|
gobject.GObject.__init__(self)
|
||||||
|
|
||||||
|
self.mimetype = None
|
||||||
|
|
||||||
|
self.audiocaps = {}
|
||||||
|
self.videocaps = {}
|
||||||
|
|
||||||
|
self.videowidth = 0
|
||||||
|
self.videoheight = 0
|
||||||
|
self.videorate = gst.Fraction(0,1)
|
||||||
|
|
||||||
|
self.audiofloat = False
|
||||||
|
self.audiorate = 0
|
||||||
|
self.audiodepth = 0
|
||||||
|
self.audiowidth = 0
|
||||||
|
self.audiochannels = 0
|
||||||
|
|
||||||
|
self.audiolength = 0L
|
||||||
|
self.videolength = 0L
|
||||||
|
|
||||||
|
self.is_video = False
|
||||||
|
self.is_audio = False
|
||||||
|
|
||||||
|
self.otherstreams = []
|
||||||
|
|
||||||
|
self.finished = False
|
||||||
|
self.tags = {}
|
||||||
|
self._success = False
|
||||||
|
|
||||||
|
self._timeoutid = 0
|
||||||
|
|
||||||
|
if not os.path.isfile(filename):
|
||||||
|
self.finished = True
|
||||||
|
return
|
||||||
|
|
||||||
|
# the initial elements of the pipeline
|
||||||
|
self.src = gst.element_factory_make("filesrc")
|
||||||
|
self.src.set_property("location", filename)
|
||||||
|
self.src.set_property("blocksize", 1000000)
|
||||||
|
self.dbin = gst.element_factory_make("decodebin")
|
||||||
|
self.add(self.src, self.dbin)
|
||||||
|
self.src.link(self.dbin)
|
||||||
|
self.typefind = self.dbin.get_by_name("typefind")
|
||||||
|
|
||||||
|
# callbacks
|
||||||
|
self.typefind.connect("have-type", self._have_type_cb)
|
||||||
|
self.dbin.connect("new-decoded-pad", self._new_decoded_pad_cb)
|
||||||
|
self.dbin.connect("unknown-type", self._unknown_type_cb)
|
||||||
|
|
||||||
|
def _finished(self, success=False):
|
||||||
|
self.debug("success:%d" % success)
|
||||||
|
self._success = success
|
||||||
|
self.bus.remove_signal_watch()
|
||||||
|
if self._timeoutid:
|
||||||
|
gobject.source_remove(self._timeoutid)
|
||||||
|
self._timeoutid = 0
|
||||||
|
gobject.idle_add(self._stop)
|
||||||
|
return False
|
||||||
|
|
||||||
|
def _stop(self):
|
||||||
|
self.debug("success:%d" % self._success)
|
||||||
|
self.finished = True
|
||||||
|
self.set_state(gst.STATE_READY)
|
||||||
|
self.debug("about to emit signal")
|
||||||
|
self.emit('discovered', self._success)
|
||||||
|
|
||||||
|
|
||||||
|
def _bus_message_cb(self, bus, message):
|
||||||
|
if message.type == gst.MESSAGE_EOS:
|
||||||
|
self._finished()
|
||||||
|
elif message.type == gst.MESSAGE_TAG:
|
||||||
|
for key in message.parse_tag().keys():
|
||||||
|
self.tags[key] = message.structure[key]
|
||||||
|
elif message.type == gst.MESSAGE_ERROR:
|
||||||
|
self._finished()
|
||||||
|
|
||||||
|
def discover(self):
|
||||||
|
"""Find the information on the given file asynchronously"""
|
||||||
|
self.debug("starting discovery")
|
||||||
|
if self.finished:
|
||||||
|
self.emit('discovered', False)
|
||||||
|
return
|
||||||
|
|
||||||
|
self.bus = self.get_bus()
|
||||||
|
self.bus.add_signal_watch()
|
||||||
|
self.bus.connect("message", self._bus_message_cb)
|
||||||
|
|
||||||
|
# 3s timeout
|
||||||
|
self._timeoutid = gobject.timeout_add(3000, self._finished)
|
||||||
|
|
||||||
|
self.info("setting to PLAY")
|
||||||
|
if not self.set_state(gst.STATE_PLAYING):
|
||||||
|
self._finished()
|
||||||
|
|
||||||
|
def _time_to_string(self, value):
|
||||||
|
"""
|
||||||
|
transform a value in nanoseconds into a human-readable string
|
||||||
|
"""
|
||||||
|
ms = value / gst.MSECOND
|
||||||
|
sec = ms / 1000
|
||||||
|
ms = ms % 1000
|
||||||
|
min = sec / 60
|
||||||
|
sec = sec % 60
|
||||||
|
return "%2dm %2ds %3d" % (min, sec, ms)
|
||||||
|
|
||||||
|
def print_info(self):
|
||||||
|
"""prints out the information on the given file"""
|
||||||
|
if not self.finished:
|
||||||
|
return
|
||||||
|
if not self.mimetype:
|
||||||
|
print "Unknown media type"
|
||||||
|
return
|
||||||
|
print "Mime Type :\t", self.mimetype
|
||||||
|
if not self.is_video and not self.is_audio:
|
||||||
|
return
|
||||||
|
print "Length :\t", self._time_to_string(max(self.audiolength, self.videolength))
|
||||||
|
print "\tAudio:", self._time_to_string(self.audiolength), "\tVideo:", self._time_to_string(self.videolength)
|
||||||
|
if self.is_video and self.videorate:
|
||||||
|
print "Video :"
|
||||||
|
print "\t%d x %d @ %d/%d fps" % (self.videowidth,
|
||||||
|
self.videoheight,
|
||||||
|
self.videorate.num, self.videorate.denom)
|
||||||
|
if self.tags.has_key("video-codec"):
|
||||||
|
print "\tCodec :", self.tags.pop("video-codec")
|
||||||
|
if self.is_audio:
|
||||||
|
print "Audio :"
|
||||||
|
if self.audiofloat:
|
||||||
|
print "\t%d channels(s) : %dHz @ %dbits (float)" % (self.audiochannels,
|
||||||
|
self.audiorate,
|
||||||
|
self.audiowidth)
|
||||||
|
else:
|
||||||
|
print "\t%d channels(s) : %dHz @ %dbits (int)" % (self.audiochannels,
|
||||||
|
self.audiorate,
|
||||||
|
self.audiodepth)
|
||||||
|
if self.tags.has_key("audio-codec"):
|
||||||
|
print "\tCodec :", self.tags.pop("audio-codec")
|
||||||
|
for stream in self.otherstreams:
|
||||||
|
if not stream == self.mimetype:
|
||||||
|
print "Other unsuported Multimedia stream :", stream
|
||||||
|
if self.tags:
|
||||||
|
print "Additional information :"
|
||||||
|
for tag in self.tags.keys():
|
||||||
|
print "%20s :\t" % tag, self.tags[tag]
|
||||||
|
|
||||||
|
def _unknown_type_cb(self, dbin, pad, caps):
|
||||||
|
self.debug("unknown type : %s" % caps.to_string())
|
||||||
|
# if we get an unknown type and we don't already have an
|
||||||
|
# audio or video pad, we are finished !
|
||||||
|
self.otherstreams.append(caps.to_string())
|
||||||
|
if not self.is_video and not self.is_audio:
|
||||||
|
self.finished = True
|
||||||
|
self._finished()
|
||||||
|
|
||||||
|
def _have_type_cb(self, typefind, prob, caps):
|
||||||
|
self.mimetype = caps.to_string()
|
||||||
|
|
||||||
|
def _notify_caps_cb(self, pad, args):
|
||||||
|
caps = pad.get_negotiated_caps()
|
||||||
|
if not caps:
|
||||||
|
pad.info("no negotiated caps available")
|
||||||
|
return
|
||||||
|
pad.info("caps:%s" % caps.to_string)
|
||||||
|
# the caps are fixed
|
||||||
|
# We now get the total length of that stream
|
||||||
|
q = gst.query_new_duration(gst.FORMAT_TIME)
|
||||||
|
pad.info("sending position query")
|
||||||
|
if pad.get_peer().query(q):
|
||||||
|
format, length = q.parse_duration()
|
||||||
|
pad.info("got position query answer : %d:%d" % (length, format))
|
||||||
|
else:
|
||||||
|
length = -1
|
||||||
|
gst.warning("position query didn't work")
|
||||||
|
|
||||||
|
# We store the caps and length in the proper location
|
||||||
|
if "audio" in caps.to_string():
|
||||||
|
self.audiocaps = caps
|
||||||
|
self.audiolength = length
|
||||||
|
self.audiorate = caps[0]["rate"]
|
||||||
|
self.audiowidth = caps[0]["width"]
|
||||||
|
self.audiochannels = caps[0]["channels"]
|
||||||
|
if "x-raw-float" in caps.to_string():
|
||||||
|
self.audiofloat = True
|
||||||
|
else:
|
||||||
|
self.audiodepth = caps[0]["depth"]
|
||||||
|
if (not self.is_video) or self.videocaps:
|
||||||
|
self._finished(True)
|
||||||
|
elif "video" in caps.to_string():
|
||||||
|
self.videocaps = caps
|
||||||
|
self.videolength = length
|
||||||
|
self.videowidth = caps[0]["width"]
|
||||||
|
self.videoheight = caps[0]["height"]
|
||||||
|
self.videorate = caps[0]["framerate"]
|
||||||
|
if (not self.is_audio) or self.audiocaps:
|
||||||
|
self._finished(True)
|
||||||
|
|
||||||
|
def _new_decoded_pad_cb(self, dbin, pad, is_last):
|
||||||
|
# Does the file contain got audio or video ?
|
||||||
|
caps = pad.get_caps()
|
||||||
|
gst.info("caps:%s" % caps.to_string())
|
||||||
|
if "audio" in caps.to_string():
|
||||||
|
self.is_audio = True
|
||||||
|
elif "video" in caps.to_string():
|
||||||
|
self.is_video = True
|
||||||
|
else:
|
||||||
|
self.warning("got a different caps.. %s" % caps.to_string())
|
||||||
|
return
|
||||||
|
if is_last and not self.is_video and not self.is_audio:
|
||||||
|
self._finished(False)
|
||||||
|
return
|
||||||
|
# we connect a fakesink to the new pad...
|
||||||
|
pad.info("adding queue->fakesink")
|
||||||
|
fakesink = gst.element_factory_make("fakesink")
|
||||||
|
queue = gst.element_factory_make("queue")
|
||||||
|
self.add(fakesink, queue)
|
||||||
|
queue.link(fakesink)
|
||||||
|
sinkpad = fakesink.get_pad("sink")
|
||||||
|
queuepad = queue.get_pad("sink")
|
||||||
|
# ... and connect a callback for when the caps are fixed
|
||||||
|
sinkpad.connect("notify::caps", self._notify_caps_cb)
|
||||||
|
if pad.link(queuepad):
|
||||||
|
pad.warning("##### Couldn't link pad to queue")
|
||||||
|
queue.set_state(gst.STATE_PLAYING)
|
||||||
|
fakesink.set_state(gst.STATE_PLAYING)
|
||||||
|
gst.info('finished here')
|
||||||
Loading…
Reference in a new issue