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# Copyright 2007 World Wide Workshop Foundation
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# If you find this activity useful or end up using parts of it in one of your
# own creations we would love to hear from you at info@WorldWideWorkshop.org !
#
import os
import gst
import logging
from globals import Globals
from util.decorators import Property
class AudioPlayer(object):
def __init__(self):
pass
@Property
def uri():
def get(self): return self.__uri
def set(self, value):
if value is None or not os.path.exists(value):
logging.error('AudioPlayer - Invalid URI: %r', value)
return
self.__uri = value
size = os.path.getsize(self.__uri)
self.pipeline.get_by_name('source').set_property('location', self.__uri)
self.pipeline.get_by_name('source').set_property('mmapsize', size)
@Property
def raw():
def get(self):
if self.uri is None:
logging.error('AudioPlayer - No data')
return None
f = open(self.uri, 'r')
raw = f.read()
f.close()
return raw
def set(self, value):
name = Globals.temporary_filename()
f = open(name, 'w')
f.write(value)
f.close()
self.uri = name
logging.debug('AudioPlayer - set_raw wrote %d bytes to %s', len(value), name)
@Property
def pipeline():
def get(self):
if self.__pipeline is None:
self.__pipeline = self.__build_pipeline()
return self.__pipeline
def play(self):
logging.debug('AudioPlayer - started playing sound')
self.pipeline.set_state(gst.STATE_PLAYING)
logging.debug('AudioPlayer - finished playing sound')
def __build_pipeline(self):
# pipeline
pipeline = gst.Pipeline('pipeline')
# add source
source = gst.element_factory_make('filesrc', 'source')
pipeline.add(source)
# add decoder
decoder = gst.element_factory_make('decodebin', 'decoder')
decoder.connect("new-decoded-pad", self.__new_decoded_pad) #, converter)
pipeline.add(decoder)
source.link(decoder)
# add converter
converter = gst.element_factory_make("audioconvert", "converter")
pipeline.add(converter)
# add output
sink = gst.element_factory_make('autoaudiosink', 'sink')
pipeline.add(sink)
converter.link(sink)
bus = pipeline.get_bus()
bus.add_signal_watch()
bus.connect('message', self.__on_audio_message)
return pipeline
# callbacks ##################################################################
def __new_decoded_pad(self, dbin, pad, islast): #, converter)
converter = self.pipeline.get_by_name('converter') # TODO - pass by arg
pad.link(converter.get_pad("sink"))
def __on_audio_message(self, bus, message):
t = message.type
#logging.debug('message: %r' % t)
if t == gst.MESSAGE_EOS:
self.pipeline.set_state(gst.STATE_NULL)
logging.debug('AudioPlayer - EOS')
elif t == gst.MESSAGE_ERROR:
self.pipeline.set_state(gst.STATE_NULL)
err, debug = message.parse_error()
logging.debug('AudioPlayer - Error: %r %r', err, debug)
# Not used
def __on_source_handoff(self, source, buffer, pad):
logging.debug('on_source_handoff(%r, %r, %r)', source, buffer, pad)
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