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#!/usr/bin/python
# -*- mode: python; coding: utf-8 -*-
# Copyright © 2009 Jeffrey C. Ollie
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see
# <http://www.gnu.org/licenses/>.
# Based upon code originally posted by Jono Bacon to his blog:
# http://www.jonobacon.org/2006/12/27/using-gnonlin-with-gstreamer-and-python/
import sys
import optparse
import pygst
pygst.require('0.10')
import gst
import gobject
# Cisco ringtones can be at most 16080 bytes long
max_ringtone_length_bytes = 16080
ringtone_sample_rate = 8000.0
ringtone_bytes_per_sample = 1
max_ringtone_duration = max_ringtone_length_bytes / (ringtone_bytes_per_sample * ringtone_sample_rate)
class Main:
def __init__(self, mainloop, source, destination, start, duration):
if duration > max_ringtone_duration:
sys.stderr.write('Cisco ring tones may be at most %4.2f seconds long, reducing duration.\n' % max_ringtone_duration)
duration = max_ringtone_duration
self.mainloop = mainloop
self.pipeline = gst.Pipeline()
bus = self.pipeline.get_bus()
bus.add_signal_watch()
bus.connect('message', self.handle_message)
self.gnlcomposition = gst.element_factory_make('gnlcomposition')
self.gnlcomposition.connect('pad-added', self.on_pad_added)
self.pipeline.add(self.gnlcomposition)
self.gnlfilesource = gst.element_factory_make('gnlfilesource')
self.gnlfilesource.set_property('caps', gst.caps_from_string('audio/x-raw-int; audio/x-raw-float'))
self.gnlfilesource.set_property('location', source)
self.gnlfilesource.set_property('start', 0 * gst.SECOND)
self.gnlfilesource.set_property('duration', int(duration * gst.SECOND))
self.gnlfilesource.set_property('media-start', int(start * gst.SECOND))
self.gnlfilesource.set_property('media-duration', int(duration * gst.SECOND))
self.gnlcomposition.add(self.gnlfilesource)
self.audioconvert = gst.element_factory_make('audioconvert')
self.pipeline.add(self.audioconvert)
self.audioresample = gst.element_factory_make('audioresample')
self.pipeline.add(self.audioresample)
self.audioconvert.link(self.audioresample)
self.mulawenc = gst.element_factory_make('mulawenc')
self.pipeline.add(self.mulawenc)
self.audioresample.link(self.mulawenc)
self.capsfilter = gst.element_factory_make('capsfilter')
self.capsfilter.set_property('caps',
gst.caps_from_string('audio/x-mulaw,rate=8000,channels=1'))
self.pipeline.add(self.capsfilter)
self.mulawenc.link(self.capsfilter)
self.filesink = gst.element_factory_make('filesink')
self.filesink.set_property('location', destination)
self.pipeline.add(self.filesink)
self.capsfilter.link(self.filesink)
self.pipeline.set_state(gst.STATE_PLAYING)
def on_pad_added(self, element, pad):
if element == self.gnlcomposition:
pad.link(self.audioconvert.get_compatible_pad(pad, pad.get_caps()))
def handle_message(self, bus, message):
if message.type == gst.MESSAGE_EOS:
self.pipeline.set_state(gst.STATE_NULL)
self.mainloop.quit()
elif message.type == gst.MESSAGE_ERROR:
error, debug = message.parse_error()
sys.stderr.write('Error %s: %s\n' % (error, debug))
self.pipeline.set_state(gst.STATE_NULL)
self.mainloop.quit()
parser = optparse.OptionParser(version='0.2')
parser.add_option('-s', '--start',
action = 'store',
type = 'float',
dest = 'start',
default = 0.0,
help = 'Position in the audio file to start extracting ring tone from.',
metavar = 'SECONDS')
parser.add_option('-d', '--duration',
action = 'store',
type = 'float',
dest = 'duration',
default = max_ringtone_duration,
help = 'Duration of ring tone to extract from the audio file.',
metavar = 'SECONDS')
options, args = parser.parse_args()
if len(args) != 2:
sys.stderr.write('Must specify a source and a destination!\n')
sys.exit(1)
gobject.threads_init()
mainloop = gobject.MainLoop()
start=Main(mainloop, args[0], args[1], options.start, options.duration)
mainloop.run()
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