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- # Source Generated with Decompyle++
- # File: in.pyc (Python 2.6)
-
- '''
- Class and functions for getting multimedia information about files
- '''
- import os.path as os
- import gobject
- import gst
- from gst.extend.pygobject import gsignal
-
- class Discoverer(gst.Pipeline):
- """
- Discovers information about files.
- This class is event-based and needs a mainloop to work properly.
- Emits the 'discovered' signal when discovery is finished.
-
- The 'discovered' callback has one boolean argument, which is True if the
- file contains decodable multimedia streams.
- """
- __gsignals__ = {
- 'discovered': (gobject.SIGNAL_RUN_FIRST, None, (gobject.TYPE_BOOLEAN,)) }
- mimetype = None
- audiocaps = { }
- videocaps = { }
- videowidth = 0
- videoheight = 0
- videorate = 0
- audiofloat = False
- audiorate = 0
- audiodepth = 0
- audiowidth = 0
- audiochannels = 0
- audiolength = 0x0L
- videolength = 0x0L
- is_video = False
- is_audio = False
- otherstreams = []
- finished = False
- sinknumber = 0
- tags = { }
-
- def __init__(self, filename, max_interleave = 1, timeout = 3000):
- """
- filename: str; absolute path of the file to be discovered.
- max_interleave: int or float; the maximum frame interleave in seconds.
- The value must be greater than the input file frame interleave
- or the discoverer may not find out all input file's streams.
- The default value is 1 second and you shouldn't have to change it,
- changing it mean larger discovering time and bigger memory usage.
- timeout: int; duration in ms for the discovery to complete.
- """
- 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 = 0x0L
- self.videolength = 0x0L
- self.is_video = False
- self.is_audio = False
- self.otherstreams = []
- self.finished = False
- self.tags = { }
- self._success = False
- self._nomorepads = False
- self._timeoutid = 0
- self._timeout = timeout
- self._max_interleave = max_interleave
- if not os.path.isfile(filename):
- self.debug("File '%s' does not exist, finished" % filename)
- self.finished = True
- return None
- 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')
- self.typefind.connect('have-type', self._have_type_cb)
- self.dbin.connect('new-decoded-pad', self._new_decoded_pad_cb)
- self.dbin.connect('no-more-pads', self._no_more_pads_cb)
- self.dbin.connect('unknown-type', self._unknown_type_cb)
-
-
- def _timed_out_or_eos(self):
- if not not (self.is_audio) or not (self.is_video):
- if (self.is_audio or not (self.audiocaps) or self.is_video) and not (self.videocaps):
- self._finished(False)
- else:
- self._finished(True)
-
-
- 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.debug('Got EOS')
- self._timed_out_or_eos()
- 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.debug('Got 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 None
- self.bus = self.get_bus()
- self.bus.add_signal_watch()
- self.bus.connect('message', self._bus_message_cb)
- self._timeoutid = gobject.timeout_add(self._timeout, self._timed_out_or_eos)
- 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 None
- if not self.mimetype:
- print 'Unknown media type'
- return None
- print 'Mime Type :\t', self.mimetype
- if not (self.is_video) and not (self.is_audio):
- return None
- 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
- continue
-
- if self.tags:
- print 'Additional information :'
- for tag in self.tags.keys():
- print '%20s :\t' % tag, self.tags[tag]
-
-
-
-
- def _no_more_pads_cb(self, dbin):
- self.info('no more pads')
- self._nomorepads = True
-
-
- def _unknown_type_cb(self, dbin, pad, caps):
- self.debug('unknown type : %s' % caps.to_string())
- 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 None
- pad.info('caps:%s' % caps.to_string())
- q = gst.query_new_duration(gst.FORMAT_TIME)
- pad.info('sending duration query')
- if pad.get_peer().query(q):
- (format, length) = q.parse_duration()
- if format == gst.FORMAT_TIME:
- pad.info('got duration (time) : %s' % (gst.TIME_ARGS(length),))
- else:
- pad.info('got duration : %d [format:%d]' % (length, format))
- else:
- length = -1
- gst.warning('duration query failed')
- 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 self._nomorepads:
- pass
- None if not (self.is_video) or self.videocaps else self.videocaps
- 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 self._nomorepads:
- pass
- None if not (self.is_audio) or self.audiocaps else self.audiocaps
-
-
-
- def _new_decoded_pad_cb(self, dbin, pad, is_last):
- 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 None
- if 'audio' in caps.to_string() and not (self.is_video) and not (self.is_audio):
- self.debug('is last, not video or audio')
- self._finished(False)
- return None
- pad.info('adding queue->fakesink')
- if not 'audio' in caps.to_string() or 'audio':
- pass
- fakesink = gst.element_factory_make('fakesink', 'fakesink%d-%s' % (self.sinknumber, 'video'))
- self.sinknumber += 1
- queue = gst.element_factory_make('queue')
- queue.props.min_threshold_time = int(self._max_interleave * gst.SECOND)
- queue.props.max_size_time = int(2 * self._max_interleave * gst.SECOND)
- queue.props.max_size_bytes = 0
- queue.props.max_size_buffers = int(100 * self._max_interleave)
-
- def _disable_min_threshold_cb(queue):
- queue.props.min_threshold_time = 0
- queue.disconnect(signal_id)
-
- signal_id = queue.connect('overrun', _disable_min_threshold_cb)
- self.add(fakesink, queue)
- queue.link(fakesink)
- sinkpad = fakesink.get_pad('sink')
- queuepad = queue.get_pad('sink')
- sinkpad.connect('notify::caps', self._notify_caps_cb)
- queue.set_state(gst.STATE_PLAYING)
- fakesink.set_state(gst.STATE_PLAYING)
- gst.info('finished here')
-
-
-