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- #!/usr/bin/env python
- # -*- Mode: Python -*-
- # vi:si:et:sw=4:sts=4:ts=4
-
- # gst-python
- # Copyright (C) 2003 David I. Lehn
- #
- # This library is free software; you can redistribute it and/or
- # modify it under the terms of the GNU Library General Public
- # License as published by the Free Software Foundation; either
- # version 2 of the License, or (at your option) any later version.
- #
- # This library is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- # Library General Public License for more details.
- #
- # You should have received a copy of the GNU Library General Public
- # License along with this library; if not, write to the
- # Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- # Boston, MA 02111-1307, USA.
- #
- # Author: David I. Lehn <dlehn@users.sourceforge.net>
- #
-
- import sys
- import gst
-
- def gst_props_debug_entry(entry, level=0):
- name = entry.get_name()
- type = entry.get_props_type()
- indent = ' '*level
-
- if type == PROPS_INT_TYPE:
- ret, val = entry.get_int()
- assert ret
- print '%s%s: int %d' % (indent, name, val)
- elif type == PROPS_FLOAT_TYPE:
- ret, val = entry.get_float()
- assert ret
- print '%s%s: float %f' % (indent, name, val)
- elif type == PROPS_FOURCC_TYPE:
- ret, val = entry.get_fourcc()
- assert ret
- print '%s%s: fourcc %c%c%c%c' % (indent, name,
- (val>>0)&0xff,
- (val>>8)&0xff,
- (val>>16)&0xff,
- (val>>24)&0xff)
- elif type == PROPS_BOOLEAN_TYPE:
- ret, val = entry.get_bool()
- assert ret
- print '%s%s: bool %d' % (indent, name, val)
- elif type == PROPS_STRING_TYPE:
- ret, val = entry.get_string()
- assert ret
- print '%s%s: string "%s"' % (indent, name, val)
- elif type == PROPS_INT_RANGE_TYPE:
- ret, min, max = entry.get_int_range()
- assert ret
- print '%s%s: int range %d-%d' % (indent, name, min, max)
- elif type == PROPS_FLOAT_RANGE_TYPE:
- ret, min, max = entry.get_float_range()
- assert ret
- print '%s%s: float range %f-%f' % (indent, name, min, max)
- elif type == PROPS_LIST_TYPE:
- ret, val = entry.get_list()
- assert ret
- print '[list] ('
- for e in val:
- gst_props_debug_entry(e, level+1)
- print ')'
- else:
- print '%sWARNING: %s: unknown property type %d' % (indent, name, type)
-
- def debug_caps(caps):
- props = caps.get_props()
- ret, plist = props.get_list()
- for e in plist:
- gst_props_debug_entry(e, level=1)
-
- def streaminfo(sender, pspec):
- assert pspec.name == 'streaminfo'
- caps = sender.get_property(pspec.name)
- print 'streaminfo:'
- debug_caps(caps)
-
- def metadata(sender, pspec):
- assert pspec.name == 'metadata'
- caps = sender.get_property(pspec.name)
- print 'metadata:'
- debug_caps(caps)
-
- def decoder_notified(sender, pspec):
- if pspec.name == 'streaminfo':
- streaminfo(sender, pspec)
- elif pspec.name == 'metadata':
- metadata(sender, pspec)
- else:
- print 'notify:', sender, pspec
-
- def main(args):
- "Basic example to play an Ogg Vorbis stream through OSS"
-
- if len(args) != 2:
- print 'usage: %s <Ogg Vorbis file>' % args
- return -1
-
- bin = gst.parse_launch('filesrc name=source ! ' +
- 'oggdemux name=demuxer ! ' +
- 'vorbisdec name=decoder ! ' +
- 'audioconvert ! osssink')
- filesrc = bin.get_by_name('source')
- filesrc.set_property('location', args[1])
- demuxer = bin.get_by_name('demuxer')
- demuxer.connect('notify', decoder_notified)
- decoder = bin.get_by_name('decoder')
- decoder.connect('notify', decoder_notified)
-
- # start playing
- bin.set_state(gst.STATE_PLAYING);
-
- try:
- while bin.iterate():
- pass
- except KeyboardInterrupt:
- pass
-
- # stop the bin
- bin.set_state(gst.STATE_NULL)
-
- if __name__ == '__main__':
- sys.exit(main(sys.argv))
-