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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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144 lines
4.2 KiB
Python
Executable file
144 lines
4.2 KiB
Python
Executable file
#!/usr/bin/env python
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#
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# gst-python
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# Copyright (C) 2003 David I. Lehn
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#
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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 Library General Public
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# License as published by the Free Software Foundation; either
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# version 2 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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# Library General Public License for more details.
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#
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# You should have received a copy of the GNU Library General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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#
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# Author: David I. Lehn <dlehn@users.sourceforge.net>
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#
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import sys
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from gstreamer import *
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def gst_props_debug_entry(entry, level=0):
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name = entry.get_name()
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type = entry.get_props_type()
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indent = ' '*level
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if type == PROPS_INT_TYPE:
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ret, val = entry.get_int()
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assert ret
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print '%s%s: int %d' % (indent, name, val)
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elif type == PROPS_FLOAT_TYPE:
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ret, val = entry.get_float()
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assert ret
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print '%s%s: float %f' % (indent, name, val)
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elif type == PROPS_FOURCC_TYPE:
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ret, val = entry.get_fourcc()
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assert ret
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print '%s%s: fourcc %c%c%c%c' % (indent, name,
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(val>>0)&0xff,
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(val>>8)&0xff,
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(val>>16)&0xff,
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(val>>24)&0xff)
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elif type == PROPS_BOOLEAN_TYPE:
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ret, val = entry.get_bool()
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assert ret
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print '%s%s: bool %d' % (indent, name, val)
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elif type == PROPS_STRING_TYPE:
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ret, val = entry.get_string()
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assert ret
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print '%s%s: string "%s"' % (indent, name, val)
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elif type == PROPS_INT_RANGE_TYPE:
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ret, min, max = entry.get_int_range()
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assert ret
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print '%s%s: int range %d-%d' % (indent, name, min, max)
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elif type == PROPS_FLOAT_RANGE_TYPE:
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ret, min, max = entry.get_float_range()
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assert ret
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print '%s%s: float range %f-%f' % (indent, name, min, max)
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elif type == PROPS_LIST_TYPE:
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ret, val = entry.get_list()
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assert ret
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print '[list] ('
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for e in val:
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gst_props_debug_entry(e, level+1)
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print ')'
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else:
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print '%sWARNING: %s: unknown property type %d' % (indent, name, type)
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def debug_caps(caps):
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props = caps.get_props()
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ret, plist = props.get_list()
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for e in plist:
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gst_props_debug_entry(e, level=1)
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def streaminfo(sender, pspec):
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assert pspec.name == 'streaminfo'
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caps = sender.get_property(pspec.name)
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print 'streaminfo:'
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debug_caps(caps)
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def metadata(sender, pspec):
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assert pspec.name == 'metadata'
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caps = sender.get_property(pspec.name)
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print 'metadata:'
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debug_caps(caps)
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def decoder_notified(sender, pspec):
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if pspec.name == 'streaminfo':
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streaminfo(sender, pspec)
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elif pspec.name == 'metadata':
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metadata(sender, pspec)
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else:
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print 'notify:', sender, pspec
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def main():
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"Basic example to play an Ogg Vorbis stream through OSS"
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if len(sys.argv) != 2:
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print 'usage: %s <Ogg Vorbis file>' % (sys.argv[0])
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return -1
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# create a new bin to hold the elements
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bin = Pipeline('pipeline')
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# create a disk reader
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filesrc = Element ('filesrc', 'disk_source')
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filesrc.set_property('location', sys.argv[1])
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# now get the decoder
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decoder = Element ('vorbisfile', 'parse')
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decoder.connect('notify', decoder_notified)
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# and an audio sink
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osssink = Element ('osssink', 'play_audio')
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# add objects to the main pipeline
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for e in (filesrc, decoder, osssink):
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bin.add(e)
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# link the elements
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previous = None
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for e in (filesrc, decoder, osssink):
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if previous:
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previous.link(e)
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previous = e
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# start playing
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bin.set_state(STATE_PLAYING);
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while bin.iterate(): pass
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# stop the bin
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bin.set_state(STATE_NULL)
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return 0
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if __name__ == '__main__':
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ret = main()
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sys.exit(ret)
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