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#!/usr/bin/python3
#
# flufigut
#
# flufigut, the flumotion configuration utility, is a simple tool
# that generates flumotion configuration files using pyhton jinja2
# template engine. flufigut generates planet.xml and worker.xml
# files from configuration templates and an easy to understand
# representation of the flow structure written in json or yaml.
#
#
# Copyright (C) 2018 Christian Pointner <equinox@spreadspace.org>
#
# This file is part of flufigut.
#
# flufigut 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
# any later version.
#
# flufigut 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 flufigut. If not, see <http://www.gnu.org/licenses/>.
#
import string
import random
import sys
import yaml
# from jinja2 import Environment, FileSystemLoader
# helper functions ############################################
#
def rand_string(size=8, chars=string.ascii_lowercase + string.ascii_uppercase + string.digits):
return ''.join(random.choice(chars) for x in range(size))
# a flufigut stream description ###############################
#
class Description:
def __init__(self):
self.globals = {}
self.inputs = {}
self.muxes = {}
self.streams = {}
self.records = {}
def _sanity_check(self):
# TODO: add more sanity checks
components = {}
for _, worker in self.globals['workers'].items():
for c in worker:
if c in components:
raise Exception("ERROR: component '%s' is assigned to more than one worker!" % c)
else:
components[c] = 1
def parse(self, config_file):
cf = open(config_file, 'r')
config = yaml.load(cf)
cf.close()
self.globals = config['globals']
self.inputs = config['inputs']
self.muxes = config['muxes']
self.streams = config['streams']
if 'records' in config:
self.records = config['records']
return self._sanity_check()
# a flumtion planet configuration #############################
#
class Planet:
def __init__(self):
self.atmosphere = {}
self.flow = {}
self._workers = {}
self._components = {}
#
# inputs
def __set_input_properties(self, name, props, globals):
for prop in props.keys():
if prop == 'resolution':
self.flow['inputs'][name]['properties']['width'] = globals['resolutions'][props[prop]]['width']
self.flow['inputs'][name]['properties']['height'] = globals['resolutions'][props[prop]]['height']
self.flow['inputs'][name]['properties']['framerate'] = globals['resolutions'][props[prop]]['rate']
else:
self.flow['inputs'][name]['properties'][prop] = props[prop]
def _generate_inputs(self, inputs, globals):
self.flow['inputs'] = {}
master_cnt = 0
for source, input in inputs.items():
name = 'input-%s' % source
if name not in self._components:
self._components[name] = -1
else:
self._components[name] = 1
self.flow['inputs'][name] = {
'type': input['type'],
'desc': "capture raw data from %s" % (source),
'worker': name,
'master': input['master'],
'properties': {},
}
if input['master']:
master_cnt += 1
self.__set_input_properties(name, input['properties'], globals)
if master_cnt == 0:
raise exception("You have not configured any master clock device!")
elif master_cnt > 1:
raise exception("You have configured multiple master clock devices!")
#
# muxes
def __generate_audio_resampler(self, mux, format, inputs, globals):
source = mux['audio'].split(':')[0]
input_samplerate = inputs[source]['properties']['samplerate']
if 'samplerate' in globals['formats'][format]:
samplerate = globals['formats'][format]['samplerate']
if samplerate != input_samplerate:
comp_name = 'resample-%s' % (source)
if comp_name not in self._components:
self._components[comp_name] = -1
else:
self._components[comp_name] = 1
feeder = 'input-%s' % (mux['audio'])
self.flow['inputs']['resample-%s-%s' % (source, samplerate)] = {
'type': 'audio-resample',
'desc': "resample audio from %s to %s Hz" % (source, samplerate),
'worker': comp_name,
'feeder': feeder,
'properties': {
'samplerate': samplerate,
},
}
def __generate_video_resizer(self, mux, format, inputs, globals):
source = mux['video'].split(':')[0]
input_resolution = inputs[source]['properties']['resolution']
for profile in mux['formats'][format]:
if 'video' in globals['profiles'][profile]:
if input_resolution == "":
raise exception("format definition needs video but no video input given")
resolution = globals['profiles'][profile]['video']
if input_resolution != resolution:
if globals['resolutions'][resolution]['rate'] != globals['resolutions'][input_resolution]['rate']:
raise exception("ERROR: video rate conversion is not yet supported!!!")
comp_name = 'resize-%s' % (source)
if comp_name not in self._components:
self._components[comp_name] = -1
else:
self._components[comp_name] = 1
feeder = 'input-%s' % (mux['video'])
self.flow['inputs']['resize-%s-%s' % (source, resolution)] = {
'type': 'video-resize',
'desc': "resize video from %s to %sx%s" % (source, globals['resolutions'][resolution]['width'], globals['resolutions'][resolution]['height']),
'worker': comp_name,
'feeder': feeder,
'properties': {
'width': globals['resolutions'][resolution]['width'],
'height': globals['resolutions'][resolution]['height'],
},
}
def _generate_muxes(self, muxes, inputs, globals):
for _, mux in muxes.items():
for format in mux['formats'].keys():
if 'audio' in mux:
self.__generate_audio_resampler(mux, format, inputs, globals)
if 'video' in mux:
self.__generate_video_resizer(mux, format, inputs, globals)
# TODO: add encoder and muxer
#
# all
def generate(self, desc):
self._generate_inputs(desc.inputs, desc.globals)
self._generate_muxes(desc.muxes, desc.inputs, desc.globals)
# Main ########################################################
#
if __name__ == '__main__':
import traceback
import pprint
__pp = pprint.PrettyPrinter(indent=4, width=160)
if len(sys.argv) <= 1:
print("ERROR: No configuration file given")
sys.exit(-1)
config_file = sys.argv[1]
ret = 0
try:
d = Description()
d.parse(config_file)
p = Planet()
p.generate(d)
print("****************************************************")
print("** atmosphere **")
print("**")
__pp.pprint(p.atmosphere)
print("**")
print("**************************")
print("** planet **")
print("**")
__pp.pprint(p.flow)
print("**")
print("****************************************************")
print("** _workers **")
print("**")
__pp.pprint(p._workers)
print("**")
print("**************************")
print("** _components **")
print("**")
__pp.pprint(p._components)
print("**")
print("****************************************************")
except Exception as e:
print("ERROR: while running app: %s" % e)
print(traceback.format_exc())
sys.exit(1)
sys.exit(ret)
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