├── r2a ├── __init__.py ├── r2afixed.py ├── ir2a.py ├── r2a_averagethroughput.py └── r2arandom.py ├── __init__.py ├── requirements.txt ├── results └── .DS_Store ├── main.py ├── .gitignore ├── dash_client.json ├── base ├── singleton.py ├── scheduler_event.py ├── scheduler.py ├── configuration_parser.py ├── timer.py ├── simple_module.py ├── message.py └── whiteboard.py ├── player ├── out_vector.py ├── parser.py └── player.py ├── dash_client.py ├── README.md ├── connection └── connection_handler.py └── LICENSE /r2a/__init__.py: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /__init__.py: -------------------------------------------------------------------------------- 1 | __all__ = ["dash_client.py", "main"] -------------------------------------------------------------------------------- /requirements.txt: -------------------------------------------------------------------------------- 1 | numpy 2 | matplotlib 3 | scipy 4 | seaborn -------------------------------------------------------------------------------- /results/.DS_Store: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/mfcaetano/pydash/HEAD/results/.DS_Store -------------------------------------------------------------------------------- /main.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 11/03/2020 4 | 5 | @description: PyDash Project 6 | 7 | Everything always starts from somewhere =) 8 | """ 9 | 10 | from dash_client import DashClient 11 | 12 | dash_client = DashClient() 13 | dash_client.run_application() -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Virtualenv 2 | venv/ 3 | ENV/ 4 | env/ 5 | .venv/ 6 | 7 | # Distribuição / pacotes 8 | build/ 9 | dist/ 10 | *.egg-info/ 11 | 12 | # Testes 13 | .coverage 14 | *.log 15 | 16 | # Editor configs extras 17 | .vscode/ 18 | 19 | 20 | .DS_Store 21 | .idea/ 22 | 23 | # Byte-compiled / optimized / DLL files 24 | __pycache__/ 25 | *.py[cod] 26 | *$py.class 27 | -------------------------------------------------------------------------------- /dash_client.json: -------------------------------------------------------------------------------- 1 | { 2 | "buffering_until": 5, 3 | "max_buffer_size": 60, 4 | "playbak_step": 1, 5 | "traffic_shaping_profile_interval": "5", 6 | "traffic_shaping_profile_sequence": "LMH", 7 | "traffic_shaping_seed": "1", 8 | "url_mpd" : "http://45.171.101.167/DASHDataset2014/BigBuckBunny/1sec/BigBuckBunny_1s_simple_2014_05_09.mpd", 9 | "r2a_algorithm": "R2AFixed" 10 | } 11 | -------------------------------------------------------------------------------- /base/singleton.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 11/03/2020 4 | 5 | @description: PyDash Project 6 | """ 7 | 8 | 9 | class Singleton(type): 10 | _instances = {} 11 | 12 | def __call__(cls, *args, **kwargs): 13 | if cls not in cls._instances: 14 | cls._instances[cls] = super(Singleton, cls).__call__(*args, **kwargs) 15 | return cls._instances[cls] 16 | -------------------------------------------------------------------------------- /base/scheduler_event.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 11/03/2020 4 | 5 | @description: PyDash Project 6 | """ 7 | 8 | 9 | class SchedulerEvent: 10 | 11 | def __init__(self, msg, src, dst): 12 | self.origin = src 13 | self.destination = dst 14 | self.msg = msg 15 | 16 | def get_src(self): 17 | return self.origin 18 | 19 | def get_dst(self): 20 | return self.destination 21 | 22 | def get_msg(self): 23 | return self.msg 24 | -------------------------------------------------------------------------------- /base/scheduler.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 11/03/2020 4 | 5 | @description: PyDash Project 6 | 7 | The Scheduler is a Singleton class implementation 8 | """ 9 | 10 | from base.singleton import Singleton 11 | 12 | 13 | class Scheduler(metaclass=Singleton): 14 | 15 | def __init__(self): 16 | self.events = [] 17 | 18 | def add_event(self, event): 19 | self.events.append(event) 20 | 21 | def get_event(self): 22 | return self.events.pop(0) 23 | 24 | def is_empty(self): 25 | return bool(self.events == []) 26 | -------------------------------------------------------------------------------- /player/out_vector.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 11/03/2020 4 | 5 | @description: PyDash Project 6 | 7 | OutVector class stores all simulation statistics to be plot later. 8 | """ 9 | 10 | import datetime 11 | 12 | 13 | class OutVector: 14 | 15 | def __init__(self): 16 | self.items = [] 17 | 18 | def add(self, t, item): 19 | self.items.append([t, item]) 20 | 21 | def __len__(self): 22 | return len(self.items) 23 | 24 | def __str__(self): 25 | return self.items.__str__() 26 | 27 | def get_items(self): 28 | return self.items 29 | 30 | #def __getitem__(self, key): 31 | # if len(self.items) == 0: 32 | # return [] 33 | 34 | # return self.items[key] 35 | -------------------------------------------------------------------------------- /base/configuration_parser.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 11/03/2020 4 | 5 | @description: PyDash Project 6 | """ 7 | import json 8 | 9 | 10 | class ConfigurationParser(): 11 | __instance = None 12 | 13 | @staticmethod 14 | def get_instance(): 15 | if ConfigurationParser.__instance is None: 16 | ConfigurationParser() 17 | return ConfigurationParser.__instance 18 | 19 | def __init__(self): 20 | if ConfigurationParser.__instance is not None: 21 | raise Exception('This class is a singleton!') 22 | else: 23 | with open('dash_client.json') as f: 24 | self.config_parameters = json.load(f) 25 | 26 | ConfigurationParser.__instance = self 27 | 28 | def get_parameter(self, key): 29 | return self.config_parameters[key] 30 | -------------------------------------------------------------------------------- /base/timer.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 11/03/2020 4 | 5 | @description: PyDash Project 6 | 7 | A Global timer reference used by all classes. 8 | """ 9 | import time 10 | 11 | 12 | class Timer(): 13 | __instance = None 14 | 15 | @staticmethod 16 | def get_instance(): 17 | if Timer.__instance is None: 18 | Timer() 19 | return Timer.__instance 20 | 21 | def __init__(self): 22 | if Timer.__instance is not None: 23 | raise Exception('This class is a singleton!') 24 | else: 25 | # for the statistics purpose 26 | self.started_time = time.perf_counter() 27 | Timer.__instance = self 28 | 29 | def get_current_time(self): 30 | return round(time.perf_counter() - self.started_time, 6) 31 | 32 | def get_started_time(self): 33 | return self.started_time 34 | -------------------------------------------------------------------------------- /r2a/r2afixed.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 03/11/2020 4 | 5 | @description: PyDash Project 6 | 7 | An implementation example of a FIXED R2A Algorithm. 8 | 9 | the quality list is obtained with the parameter of handle_xml_response() method and the choice 10 | is made inside of handle_segment_size_request(), before sending the message down. 11 | 12 | In this algorithm the quality choice is always the same. 13 | """ 14 | 15 | from player.parser import * 16 | from r2a.ir2a import IR2A 17 | 18 | 19 | class R2AFixed(IR2A): 20 | 21 | def __init__(self, id): 22 | IR2A.__init__(self, id) 23 | self.parsed_mpd = '' 24 | self.qi = [] 25 | 26 | def handle_xml_request(self, msg): 27 | self.send_down(msg) 28 | 29 | def handle_xml_response(self, msg): 30 | # getting qi list 31 | self.parsed_mpd = parse_mpd(msg.get_payload()) 32 | self.qi = self.parsed_mpd.get_qi() 33 | 34 | self.send_up(msg) 35 | 36 | def handle_segment_size_request(self, msg): 37 | # time to define the segment quality choose to make the request 38 | msg.add_quality_id(self.qi[19]) 39 | self.send_down(msg) 40 | 41 | def handle_segment_size_response(self, msg): 42 | self.send_up(msg) 43 | 44 | def initialize(self): 45 | pass 46 | 47 | def finalization(self): 48 | pass 49 | -------------------------------------------------------------------------------- /r2a/ir2a.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 03/11/2020 4 | 5 | @description: PyDash Project 6 | 7 | Abstract Class for R2A (Rate Adaptation Algorithms) implementations 8 | 9 | It is necessary to implement all the @abstractmethod methods to generate a new R2A Algorithm implementation 10 | 11 | """ 12 | 13 | from base.simple_module import SimpleModule 14 | from abc import ABCMeta, abstractmethod 15 | from base.message import Message, MessageKind 16 | from base.whiteboard import Whiteboard 17 | 18 | 19 | class IR2A(SimpleModule): 20 | 21 | def __init__(self, id): 22 | SimpleModule.__init__(self, id) 23 | 24 | # Whiteboard object to change statistical information between Player and R2A algorithm 25 | self.whiteboard = Whiteboard.get_instance() 26 | 27 | @abstractmethod 28 | def handle_xml_request(self, msg): 29 | pass 30 | 31 | @abstractmethod 32 | def handle_xml_response(self, msg): 33 | pass 34 | 35 | @abstractmethod 36 | def handle_segment_size_request(self, msg): 37 | pass 38 | 39 | @abstractmethod 40 | def handle_segment_size_response(self, msg): 41 | pass 42 | 43 | @abstractmethod 44 | def initialize(self): 45 | SimpleModule.initialize(self) 46 | pass 47 | 48 | @abstractmethod 49 | def finalization(self): 50 | SimpleModule.finalization(self) 51 | pass 52 | -------------------------------------------------------------------------------- /r2a/r2a_averagethroughput.py: -------------------------------------------------------------------------------- 1 | from r2a.ir2a import IR2A 2 | from player.parser import * 3 | import time 4 | from statistics import mean 5 | 6 | 7 | class R2A_AverageThroughput(IR2A): 8 | 9 | def __init__(self, id): 10 | IR2A.__init__(self, id) 11 | self.throughputs = [] 12 | self.request_time = 0 13 | self.qi = [] 14 | 15 | def handle_xml_request(self, msg): 16 | self.request_time = time.perf_counter() 17 | self.send_down(msg) 18 | 19 | def handle_xml_response(self, msg): 20 | 21 | parsed_mpd = parse_mpd(msg.get_payload()) 22 | self.qi = parsed_mpd.get_qi() 23 | 24 | t = time.perf_counter() - self.request_time 25 | self.throughputs.append(msg.get_bit_length() / t) 26 | 27 | self.send_up(msg) 28 | 29 | def handle_segment_size_request(self, msg): 30 | self.request_time = time.perf_counter() 31 | avg = mean(self.throughputs) / 2 32 | 33 | selected_qi = self.qi[0] 34 | for i in self.qi: 35 | if avg > i: 36 | selected_qi = i 37 | 38 | msg.add_quality_id(selected_qi) 39 | self.send_down(msg) 40 | 41 | def handle_segment_size_response(self, msg): 42 | t = time.perf_counter() - self.request_time 43 | self.throughputs.append(msg.get_bit_length() / t) 44 | self.send_up(msg) 45 | 46 | def initialize(self): 47 | pass 48 | 49 | def finalization(self): 50 | pass 51 | -------------------------------------------------------------------------------- /r2a/r2arandom.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 03/11/2020 4 | 5 | @description: PyDash Project 6 | 7 | An implementation example of a Random R2A Algorithm. 8 | 9 | The quality list is obtained with the parameter of handle_xml_response() 10 | method and the choice is made inside of handle_segment_size_request(), 11 | before sending the message down. 12 | 13 | In this algorithm the quality choice is made randomly. 14 | """ 15 | 16 | 17 | import random 18 | 19 | from player.parser import * 20 | from r2a.ir2a import IR2A 21 | 22 | 23 | class R2ARandom(IR2A): 24 | 25 | def __init__(self, id): 26 | IR2A.__init__(self, id) 27 | self.parsed_mpd = '' 28 | self.qi = [] 29 | 30 | def handle_xml_request(self, msg): 31 | self.send_down(msg) 32 | 33 | def handle_xml_response(self, msg): 34 | # getting qi list 35 | self.parsed_mpd = parse_mpd(msg.get_payload()) 36 | self.qi = self.parsed_mpd.get_qi() 37 | 38 | self.send_up(msg) 39 | 40 | def handle_segment_size_request(self, msg): 41 | 42 | #random choosing approach 43 | qi_id = random.randint(0, len(self.qi)-1) 44 | 45 | print(self.whiteboard.get_playback_history()) 46 | 47 | #list = self.whiteboard.get_playback_history() 48 | #if len(list) > 0: 49 | # print(f'>>>>>>>>>>> {list[0][1]}') 50 | 51 | # Hora de definir qual qualidade será escolhida 52 | msg.add_quality_id(self.qi[qi_id]) 53 | 54 | self.send_down(msg) 55 | 56 | def handle_segment_size_response(self, msg): 57 | 58 | 59 | 60 | self.send_up(msg) 61 | 62 | def initialize(self): 63 | # self.send_up(Message(MessageKind.SEGMENT_REQUEST, 'Olá Mundo')) 64 | pass 65 | 66 | def finalization(self): 67 | pass 68 | -------------------------------------------------------------------------------- /base/simple_module.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 11/03/2020 4 | 5 | @description: PyDash Project 6 | 7 | Abstract Class for Simple Module Implementation. 8 | 9 | Class implements basic functionality to be called by the main program. 10 | """ 11 | 12 | from abc import ABCMeta, abstractmethod 13 | from base.scheduler import Scheduler 14 | from base.scheduler_event import SchedulerEvent 15 | from base.message import Message, MessageKind 16 | 17 | 18 | class SimpleModule(metaclass=ABCMeta): 19 | 20 | def __init__(self, id): 21 | self.scheduler = Scheduler() 22 | self.id = id 23 | 24 | def send_up(self, msg): 25 | self.scheduler.add_event(SchedulerEvent(msg, self.id, self.id - 1)) 26 | 27 | # if self.id == 0: 28 | # print(f'Object {self} with id {self.id} is in the top of the control stack!') 29 | # exit(0) 30 | 31 | def send_down(self, msg): 32 | self.scheduler.add_event(SchedulerEvent(msg, self.id, self.id + 1)) 33 | 34 | @abstractmethod 35 | def initialize(self): 36 | print(f'> Initializing module {self.__class__.__name__}') 37 | pass 38 | 39 | @abstractmethod 40 | def finalization(self): 41 | print(f'> Finalization module {self.__class__.__name__}') 42 | pass 43 | 44 | @abstractmethod 45 | def handle_xml_request(self, msg): 46 | pass 47 | 48 | @abstractmethod 49 | def handle_xml_response(self, msg): 50 | pass 51 | 52 | @abstractmethod 53 | def handle_segment_size_request(self, msg): 54 | pass 55 | 56 | @abstractmethod 57 | def handle_segment_size_response(self, msg): 58 | pass 59 | 60 | def handle_message(self, msg): 61 | if msg.get_kind() == MessageKind.XML_REQUEST: 62 | self.handle_xml_request(msg) 63 | elif msg.get_kind() == MessageKind.XML_RESPONSE: 64 | self.handle_xml_response(msg) 65 | elif msg.get_kind() == MessageKind.SEGMENT_REQUEST: 66 | self.handle_segment_size_request(msg) 67 | elif msg.get_kind() == MessageKind.SEGMENT_RESPONSE: 68 | self.handle_segment_size_response(msg) 69 | else: 70 | raise ValueError(f'Invalid Message Kind - {msg}') 71 | 72 | pass 73 | -------------------------------------------------------------------------------- /dash_client.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 11/03/2020 4 | 5 | @description: PyDash Project 6 | 7 | Dash client representation. It knows all entities in our 8 | layer model (Player, R2A and Connection_Handler). 9 | There isn't a strong relation among the entities 10 | (they don't know each other). The Dash_client is 11 | responsible to make the communication among them happens. 12 | """ 13 | 14 | import importlib 15 | 16 | from base.configuration_parser import ConfigurationParser 17 | from base.scheduler import Scheduler 18 | from connection.connection_handler import ConnectionHandler 19 | from player.player import Player 20 | 21 | 22 | class DashClient: 23 | 24 | def __init__(self): 25 | config_parser = ConfigurationParser.get_instance() 26 | 27 | r2a_algorithm = str(config_parser.get_parameter('r2a_algorithm')) 28 | 29 | self.scheduler = Scheduler() 30 | 31 | self.modules = [] 32 | 33 | # adding modules to manage 34 | self.player = Player(0) 35 | 36 | # automatic loading class by the name 37 | r2a_class = getattr(importlib.import_module('r2a.' + r2a_algorithm.lower()), r2a_algorithm) 38 | self.r2a = r2a_class(1) 39 | 40 | self.connection_handler = ConnectionHandler(2) 41 | 42 | self.modules.append(self.player) 43 | self.modules.append(self.r2a) 44 | self.modules.append(self.connection_handler) 45 | 46 | 47 | def run_application(self): 48 | self.modules_initialization() 49 | 50 | while not self.scheduler.is_empty(): 51 | event = self.scheduler.get_event() 52 | self.handle_scheduler_event(event) 53 | 54 | self.modules_finalization() 55 | 56 | 57 | def handle_scheduler_event(self, event): 58 | 59 | #checking if the event is inside of the modules position range limits 60 | if event.get_dst() < 0 or event.get_dst() >= len(self.modules): 61 | print(f'It is no possible to route a {event.get_msg()} message from {event.get_src()} to {event.get_dst()} module list position.') 62 | exit(0) 63 | 64 | self.modules[event.get_dst()].handle_message(event.get_msg()) 65 | 66 | 67 | 68 | def modules_initialization(self): 69 | print('Initialization modules phase.') 70 | for m in self.modules: 71 | super(type(m), m).initialize() 72 | m.initialize() 73 | 74 | def modules_finalization(self): 75 | print('Finalization modules phase.') 76 | for m in self.modules: 77 | super(type(m), m).finalization() 78 | m.finalization() -------------------------------------------------------------------------------- /base/message.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 11/03/2020 4 | 5 | @description: PyDash Project 6 | """ 7 | 8 | from enum import Enum 9 | 10 | 11 | class MessageKind(Enum): 12 | SELF = 1 13 | SEGMENT_REQUEST = 2 14 | SEGMENT_RESPONSE = 3 15 | XML_REQUEST = 4 16 | XML_RESPONSE = 5 17 | 18 | 19 | class Message: 20 | def __init__(self, kind, payload): 21 | self.payload = payload 22 | self.kind = kind 23 | self.bit_length = 0 24 | 25 | def get_payload(self): 26 | return self.payload 27 | 28 | def set_kind(self, kind): 29 | self.kind = kind 30 | 31 | def get_kind(self): 32 | return self.kind 33 | 34 | def add_bit_length(self, bit_length): 35 | self.bit_length = bit_length 36 | 37 | def get_bit_length(self): 38 | return self.bit_length 39 | 40 | 41 | # Segment Size Message 42 | class SSMessage(Message): 43 | 44 | def __init__(self, kind, payload=None): 45 | 46 | Message.__init__(self, kind, payload) 47 | 48 | self.path_name = '' 49 | self.media_mpd = '' 50 | self.host_name = '' 51 | self.quality_id = 0 52 | self.segment_id = 0 53 | self.__found = True 54 | 55 | def __str__(self): 56 | return f'{self.segment_id}, {self.quality_id}, {self.bit_length}, {self.__found}, {self.path_name}, {self.media_mpd}, {self.host_name}' 57 | 58 | def add_path_name(self, path_name): 59 | self.path_name = path_name 60 | 61 | def add_host_name(self, host_name): 62 | self.host_name = host_name 63 | 64 | def get_host_name(self): 65 | return self.host_name 66 | 67 | def add_segment_id(self, segment_id): 68 | self.segment_id = segment_id 69 | 70 | def get_segment_id(self): 71 | return self.segment_id 72 | 73 | def get_segment_size(self): 74 | for i in self.path_name.split('/'): 75 | if 'sec' in i: 76 | return int(i.split('sec')[0]) 77 | 78 | def add_media_mpd(self, media_mpd): 79 | self.media_mpd = media_mpd 80 | 81 | def add_quality_id(self, quality_id): 82 | self.quality_id = quality_id 83 | 84 | def get_quality_id(self): 85 | return self.quality_id 86 | 87 | def set_found(self, status=True): 88 | self.__found = status 89 | 90 | def found(self): 91 | return bool(self.bit_length > 0 and self.__found) 92 | 93 | def get_url(self): 94 | media_mpd = self.media_mpd 95 | media_mpd = media_mpd.replace('$Bandwidth$', str(self.quality_id)) 96 | media_mpd = media_mpd.replace('$Number$', str(self.segment_id)) 97 | return self.path_name + '/' + media_mpd 98 | 99 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # pyDash: A Framework Based Educational Tool for Adaptive Streaming Video Algorithms Study 2 | 3 | ![bigbuckbunny](https://user-images.githubusercontent.com/4336448/118493151-2b9fc380-b6f7-11eb-8a25-9134862da754.jpg) A Python Dash Project. 4 | 5 | PyDash is a framework for the development of adaptive streaming video algorithms. It is a learning tool designed to abstract the networking communication details, allowing e-students to focus exclusively on developing and evaluating ABR protocols. 6 | 7 | PyDash is licensed as GPL. You are more than welcome to use PyDash and contribute to the project. We just ask you to properly cite our contribution as follows. 8 | 9 | > M. A. Marotta, G. C. Souza, M. Holanda and M. F. Caetano, ["PyDash - A Framework Based Educational Tool for Adaptive Streaming Video Algorithms Study"](https://ieeexplore.ieee.org/document/9637335), 2021 IEEE Frontiers in Education Conference (FIE), 2021, pp. 1-8, doi: 10.1109/FIE49875.2021.9637335. 10 | 11 | 12 | # Who we are? 13 | 14 | We are from the **Department of Computer Science** at the **University of Brasília (UnB)**, Brazil. 15 | 16 | This project is leaded by [Prof. Dr. Marcos Caetano](mailto:mfcaetano@unb.br) and [Prof. Dr. Marcelo Marotta](mailto:marcelo.marotta@unb.br). 17 | 18 | If you have any questions regarding the pyDash project, please drop us an email. 19 | 20 | # Before start 21 | 22 | PyDash is an open-source initiative that uses only open-source code as a dependency. We've implemented and tested it using the GNU Linux operating system. The following software versions were used. 23 | 24 | * Ubuntu 22.04.03 25 | * Python 3.10.12 26 | * numpy 1.26-1 27 | * matplotlib 3.8.0 28 | * seaborn 0.13.0 29 | * scipy 1.11.3 30 | 31 | # Instalation Process 32 | 33 | ## Requirements 34 | 35 | It is necessary the installation of few python packages before you can use PyDash. The requirements are described in [requirements.txt](requirements.txt) file. 36 | 37 | ## Requirements ## 38 | 39 | ## Where do I start? 40 | 41 | There are a few ways for you to set your development environment. In this section, we will present you with just one possible way to do this. 42 | 43 | * The first step is to do the checkout of the pyDash source code. You should have git software installed on your operating system. Using a terminal, do the pyDash source code repository clone operation. 44 | 45 | ``` 46 | git clone https://github.com/mfcaetano/pydash.git 47 | ``` 48 | 49 | If you are doing a Computer Networking class at the Department of Computer Science at the UnB, we strongly suggest that you should clone the repository instead of just downloading it. Source code updates could be available and new functionalities released during the current semester. 50 | 51 | ``` 52 | python3 -m venv pydash/venv 53 | ``` 54 | 55 | * Get in the repository folder. 56 | 57 | ``` 58 | cd pydash 59 | ``` 60 | 61 | * The next step is to activate the terminal and load the python configurations. 62 | 63 | ``` 64 | source venv/bin/activate 65 | ``` 66 | 67 | * Now, you need to install the dependency libraries used by pyDash. 68 | ``` 69 | pip3 install -r requirements.txt 70 | ``` 71 | 72 | Done! To test your pyDash installation, you have to execute: 73 | ``` 74 | python3 main.py 75 | ``` 76 | 77 | # Architecture 78 | 79 | ![Arquitetura](https://user-images.githubusercontent.com/4336448/98450304-85a54800-211a-11eb-93f7-fd4e60c46ed5.png) 80 | 81 | ![Arquitetura_Servidor](https://user-images.githubusercontent.com/4336448/98450354-ea60a280-211a-11eb-9fd9-1f7e1ddc1f9c.png) 82 | 83 | ![Arquitetura_Cliente](https://user-images.githubusercontent.com/4336448/98450355-ec2a6600-211a-11eb-9845-298b51f9801e.png) 84 | 85 | 86 | 87 | -------------------------------------------------------------------------------- /base/whiteboard.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 11/03/2020 4 | 5 | @description: PyDash Project 6 | 7 | Whiteboard structure to deliver statistical information 8 | from the Player to the R2A algorithms. 9 | """ 10 | 11 | 12 | class Whiteboard: 13 | __instance = None 14 | 15 | @staticmethod 16 | def get_instance(): 17 | if Whiteboard.__instance is None: 18 | Whiteboard() 19 | return Whiteboard.__instance 20 | 21 | def __init__(self): 22 | if Whiteboard.__instance is not None: 23 | raise Exception('This class is a singleton!') 24 | else: 25 | Whiteboard.__instance = self 26 | self.__buffer = [] 27 | self.__playback = [] 28 | self.__playback_qi = [] 29 | self.__playback_pauses = [] 30 | self.__playback_buffer_size = [] 31 | self.__playback_segment_size_time_at_buffer = [] 32 | # partial segment size time at buffer list 33 | self.__partial_sstb = [] 34 | self.__max_buffer_size = 0 35 | self.__amount_video_to_play = 0 36 | 37 | def add_buffer(self, buffer): 38 | self.__buffer = buffer 39 | 40 | def add_amount_video_to_play(self, amount_video_to_play): 41 | self.__amount_video_to_play = amount_video_to_play 42 | 43 | def add_max_buffer_size(self, max_buffer_size): 44 | self.__max_buffer_size = max_buffer_size 45 | 46 | def add_playback_qi(self, playback_qi): 47 | self.__playback_qi = playback_qi 48 | 49 | def add_playback_pauses(self, pauses): 50 | self.__playback_pauses = pauses 51 | 52 | def add_playback_buffer_size(self, buffer_size): 53 | self.__playback_buffer_size = buffer_size 54 | 55 | def add_playback_history(self, playback): 56 | self.__playback = playback 57 | 58 | def add_playback_segment_size_time_at_buffer(self, segment_size_time_at_buffer): 59 | self.__playback_segment_size_time_at_buffer = segment_size_time_at_buffer 60 | 61 | def get_playback_segment_size_time_at_buffer(self): 62 | """ 63 | It returns a list of the time each segment size spends 64 | in the buffer before was played by the player. The list 65 | will increase over time. It is ordered from the oldest 66 | segment until de newest one (from the begging until the 67 | end of the reproduced video). 68 | """ 69 | pos = 0 70 | 71 | try: 72 | pos = [x[1] for x in self.__playback_segment_size_time_at_buffer].index(-1, max(len(self.__partial_sstb) - 1, 0)) 73 | except: 74 | pos = len(self.__playback_segment_size_time_at_buffer) 75 | 76 | plist = [round(x[1] - x[0], 6) for x in self.__playback_segment_size_time_at_buffer[len(self.__partial_sstb):pos]] 77 | self.__partial_sstb = self.__partial_sstb + plist 78 | 79 | return tuple(self.__partial_sstb) 80 | 81 | def get_buffer(self): 82 | return tuple(self.__buffer) 83 | 84 | def get_amount_video_to_play(self): 85 | """ 86 | It returns the total amount of video stored in the __buffer that still will be played 87 | """ 88 | return self.__amount_video_to_play 89 | 90 | def get_max_buffer_size(self): 91 | """ 92 | Returns the maximum __buffer size. The download will stop after this amount will be achieved 93 | """ 94 | return self.__max_buffer_size 95 | 96 | def get_playback_qi(self): 97 | """ 98 | It returns a tuples list of time and QI's segments already played by the Player. 99 | The time represents the moment when a QI segment was consumed (played) by the Player. 100 | """ 101 | return tuple(self.__playback_qi) 102 | 103 | def get_playback_pauses(self): 104 | """ 105 | It returns a tuples list of time and pauses happened during the playing of 106 | the video. The time (s) represents the moment when a video pause occurred and 107 | the pauses represents the lenght of this pauses. 108 | """ 109 | 110 | return tuple(self.__playback_pauses) 111 | 112 | def get_playback_buffer_size(self): 113 | """ 114 | It returns a tuples list of time and __buffer size during the playing video. 115 | The time represents the moment when the __buffer size was measured. 116 | """ 117 | 118 | return tuple(self.__playback_buffer_size) 119 | 120 | def get_playback_history(self): 121 | """ 122 | It returns a tuples list of time and __playback history happened during 123 | the playing video. The time represents the moment when was measured the possible 124 | to play or not the video. For __playback, the number one means it was possible to 125 | play and zero is otherwise. 126 | """ 127 | return tuple(self.__playback) 128 | -------------------------------------------------------------------------------- /player/parser.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Matheus Stauffer (matheusvostauffer@gmail.com) 10/06/2020 4 | 5 | @description: PyDash Project 6 | 7 | A mpd parser implementation to store and extract MDP information used 8 | during the simulation 9 | """ 10 | 11 | from xml.etree.ElementTree import fromstring, ElementTree 12 | 13 | class mpd_node: 14 | def __init__(self): 15 | self.mpd_dict = {} 16 | self.period_dict = {} 17 | self.program_info_dict = {} 18 | self.adaptation_set_list = [] 19 | self.adaptation_set_dict = {} 20 | self.title = "" 21 | self.segment_template = {} 22 | self.first_level_adp_set = {} 23 | 24 | def add_mpd_info(self, data): 25 | self.mpd_dict = data 26 | 27 | # return mpd_info dict 28 | def get_mpd_info(self): 29 | return self.mpd_dict 30 | 31 | def add_period_info(self, data): 32 | self.period_dict = data 33 | 34 | # return period_info dict 35 | def get_period_info(self): 36 | return self.period_dict 37 | 38 | def add_program_info(self, data): 39 | self.program_info_dict = data 40 | 41 | # return program_info dict 42 | def get_program_info(self): 43 | return self.program_info_dict 44 | 45 | def add_adaptation_set_info(self, data): 46 | self.adaptation_set_list = data 47 | 48 | # return adaptation set 49 | def get_adaptation_set_info(self): 50 | return self.adaptation_set_list 51 | 52 | def add_title(self, data): 53 | self.title = data 54 | 55 | # return title 56 | def get_title(self): 57 | return self.title 58 | 59 | def add_segment_template(self, data): 60 | self.segment_template = data 61 | 62 | # return segment template 63 | def get_segment_template(self): 64 | return self.segment_template 65 | 66 | def add_first_level_adp_set(self, data): 67 | self.first_level_adp_set = data 68 | 69 | # return first level adp set 70 | def get_first_level_adp_set(self): 71 | return self.first_level_adp_set 72 | 73 | def get_qi(self): 74 | handle_list = self.get_adaptation_set_info() 75 | qi = [int(i['bandwidth']) for i in handle_list] 76 | qi.sort() 77 | return qi 78 | 79 | # mpd file parsing. 80 | def parse_mpd(file_path): 81 | node = mpd_node() 82 | adaptation_set = [] 83 | 84 | #tree = ET.parse(file_path) 85 | tree = ElementTree(fromstring(file_path)) 86 | 87 | root = tree.getroot() 88 | 89 | node.add_mpd_info(root.attrib) 90 | 91 | # inside mpd 92 | for child in root: 93 | if child.tag == "{urn:mpeg:dash:schema:mpd:2011}ProgramInformation": 94 | node.add_program_info(child.attrib) 95 | elif child.tag == "{urn:mpeg:dash:schema:mpd:2011}Period": 96 | node.add_period_info(child.attrib) 97 | # inside program_information and period 98 | for inside in child: 99 | if inside.tag == "{urn:mpeg:dash:schema:mpd:2011}Title": 100 | node.add_title(inside.text) 101 | elif inside.tag == "{urn:mpeg:dash:schema:mpd:2011}AdaptationSet": 102 | node.add_first_level_adp_set(inside.attrib) 103 | # inside adaptation_set 104 | for adp_set in inside: 105 | if adp_set.tag == "{urn:mpeg:dash:schema:mpd:2011}SegmentTemplate": 106 | node.add_segment_template(adp_set.attrib) 107 | else: 108 | adaptation_set.append(adp_set.attrib) 109 | 110 | node.add_adaptation_set_info(adaptation_set) 111 | 112 | return node 113 | 114 | # return the specific attribute value. 115 | # if representation_id is passed, returns the correspondent dict. 116 | def navigate_mpd(mpd_node, attribute = None, representation_id = None): 117 | handle_dict = {} 118 | handle_list = [] 119 | 120 | if representation_id: 121 | handle_list = mpd_node.get_adaptation_set_info() 122 | for i, item in enumerate(handle_list): 123 | if item['id'] == representation_id: 124 | return item 125 | 126 | else: 127 | handle_dict = mpd_node.get_mpd_info() 128 | for key in handle_dict: 129 | if attribute == key: 130 | return(attribute, handle_dict[key]) 131 | 132 | handle_dict = mpd_node.get_period_info() 133 | for key in handle_dict: 134 | if attribute == key: 135 | return(attribute, handle_dict[key]) 136 | 137 | handle_dict = mpd_node.get_program_info() 138 | for key in handle_dict: 139 | if attribute == key: 140 | return(attribute, handle_dict[key]) 141 | 142 | handle_dict = mpd_node.get_segment_template() 143 | for key in handle_dict: 144 | if attribute == key: 145 | return(attribute, handle_dict[key]) 146 | 147 | handle_dict = mpd_node.get_first_level_adp_set() 148 | for key in handle_dict: 149 | if attribute == key: 150 | return(attribute, handle_dict[key]) 151 | 152 | ''' 153 | exemplo = mpd_node() 154 | exemplo = parse_mpd('file.mpd') 155 | 156 | print(exemplo.get_mpd_info()) 157 | print(navigate_mpd(exemplo, 'timescale')) 158 | print(navigate_mpd(exemplo, 'blah', '480x360 182.0kbps')) 159 | ''' -------------------------------------------------------------------------------- /connection/connection_handler.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 11/03/2020 4 | 5 | @description: PyDash Project 6 | 7 | The ConnectionHandler is a Singleton class implementation 8 | 9 | The class responsible to retrieve segments in the web server. 10 | Also it implements a traffic shaping approach. 11 | """ 12 | 13 | from base.simple_module import SimpleModule 14 | from base.message import Message, MessageKind, SSMessage 15 | from base.configuration_parser import ConfigurationParser 16 | from player.parser import * 17 | import http.client 18 | import time 19 | from scipy.stats import expon 20 | from base.timer import Timer 21 | import math 22 | import seaborn as sns 23 | import matplotlib.pyplot as plt 24 | 25 | 26 | class ConnectionHandler(SimpleModule): 27 | 28 | def __init__(self, id): 29 | SimpleModule.__init__(self, id) 30 | self.initial_time = 0 31 | self.qi = [] 32 | 33 | # for traffic shaping 34 | config_parser = ConfigurationParser.get_instance() 35 | self.traffic_shaping_interval = int(config_parser.get_parameter('traffic_shaping_profile_interval')) 36 | self.traffic_shaping_seed = int(config_parser.get_parameter('traffic_shaping_seed')) 37 | self.traffic_shaping_values = [] 38 | 39 | # mark the current traffic shapping interval 40 | self.current_traffic_shaping_interval = 0 41 | 42 | self.traffic_shaping_sequence = [] 43 | # traffic shaping sequence position 44 | self.tss_position = 0 45 | # traffic shaping values position 46 | self.tsv_position = 0 47 | 48 | token = config_parser.get_parameter('traffic_shaping_profile_sequence') 49 | for i in range(len(token)): 50 | if token[i] == 'L': 51 | self.traffic_shaping_sequence.append(0) 52 | elif token[i] == 'M': 53 | self.traffic_shaping_sequence.append(1) 54 | elif token[i] == 'H': 55 | self.traffic_shaping_sequence.append(2) 56 | 57 | self.timer = Timer.get_instance() 58 | 59 | def get_traffic_shaping_positions(self, delta_time=0.0): 60 | current_tsi = (self.timer.get_current_time() + delta_time) // self.traffic_shaping_interval 61 | 62 | if current_tsi > self.current_traffic_shaping_interval: 63 | self.current_traffic_shaping_interval = current_tsi 64 | self.tss_position = (self.tss_position + 1) % len(self.traffic_shaping_sequence) 65 | 66 | self.tsv_position = (self.tsv_position + 1) % len(self.traffic_shaping_values[0]) 67 | 68 | return self.tss_position, self.tsv_position 69 | 70 | def initialize(self): 71 | # self.send_down(Message(MessageKind.SEGMENT_REQUEST, 'Olá Mundo')) 72 | pass 73 | 74 | def bandwidth_limitation(self, package_size=0): 75 | if package_size == 0: 76 | return 77 | 78 | tsp = self.get_traffic_shaping_positions() 79 | target_throughput = self.traffic_shaping_values[self.traffic_shaping_sequence[tsp[0]]][tsp[1]] 80 | 81 | rtt = time.perf_counter() - self.initial_time 82 | throughput = package_size / rtt 83 | 84 | # we didn't pass our throughput go 85 | if target_throughput >= throughput: 86 | return 87 | 88 | waiting_time = (package_size - (target_throughput * rtt)) / target_throughput 89 | 90 | st_data = [] 91 | if waiting_time > self.traffic_shaping_interval: 92 | 93 | waiting_time = self.traffic_shaping_interval 94 | length = package_size - (waiting_time * target_throughput) 95 | st_data.append((target_throughput, self.traffic_shaping_interval)) 96 | 97 | while length > 0: 98 | tsp = self.get_traffic_shaping_positions(waiting_time) 99 | target_throughput = self.traffic_shaping_values[self.traffic_shaping_sequence[tsp[0]]][tsp[1]] 100 | 101 | t = length / target_throughput 102 | 103 | if t > self.traffic_shaping_interval: 104 | waiting_time += self.traffic_shaping_interval 105 | length = length - (self.traffic_shaping_interval * target_throughput) 106 | st_data.append((target_throughput, self.traffic_shaping_interval)) 107 | else: 108 | waiting_time += t 109 | length = length - (t * target_throughput) 110 | st_data.append((target_throughput, t)) 111 | 112 | time.sleep(waiting_time) 113 | 114 | if len(st_data) > 0: 115 | target_throughput = package_size / (time.perf_counter() - self.initial_time) 116 | 117 | #print(f'Execution Time {self.timer.get_current_time()} > target throughput: {target_throughput} - {st_data}') 118 | 119 | 120 | def finalization(self): 121 | pass 122 | 123 | def handle_xml_request(self, msg): 124 | if not 'http://' in msg.get_payload(): 125 | raise ValueError('url_mpd parameter should starts with http://') 126 | 127 | url_tokens = msg.get_payload().split('/')[2:] 128 | port = '80' 129 | host_name = url_tokens[0] 130 | path_name = '/' + '/'.join(url_tokens[1:]) 131 | mdp_file = '' 132 | 133 | try: 134 | connection = http.client.HTTPConnection(host_name, port) 135 | connection.request('GET', path_name) 136 | mdp_file = connection.getresponse().read().decode() 137 | connection.close() 138 | except Exception as err: 139 | print('> Houston, we have a problem!') 140 | print(f'> trying to connecto to: {msg.get_payload()}') 141 | print(f'Execution Time {self.timer.get_current_time()} > msg obj: {msg}') 142 | print(err) 143 | exit(-1) 144 | 145 | msg = Message(MessageKind.XML_RESPONSE, mdp_file) 146 | msg.add_bit_length(8 * len(mdp_file)) 147 | 148 | parsed_mpd = parse_mpd(msg.get_payload()) 149 | self.qi = parsed_mpd.get_qi() 150 | 151 | increase_factor = 1 152 | low = round(self.qi[len(self.qi) - 1] * increase_factor) 153 | medium = round(self.qi[(len(self.qi) // 2) - 1] * increase_factor) 154 | high = round(self.qi[0] * increase_factor) 155 | 156 | self.traffic_shaping_values.append( 157 | expon.rvs(scale=1, loc=low, size=1000, random_state=self.traffic_shaping_seed)) 158 | self.traffic_shaping_values.append( 159 | expon.rvs(scale=1, loc=medium, size=1000, random_state=self.traffic_shaping_seed)) 160 | self.traffic_shaping_values.append( 161 | expon.rvs(scale=1, loc=high, size=1000, random_state=self.traffic_shaping_seed)) 162 | 163 | self.send_up(msg) 164 | 165 | def handle_segment_size_request(self, msg): 166 | port = '80' 167 | host_name = msg.get_host_name() 168 | path_name = msg.get_url() 169 | ss_file = '' 170 | self.initial_time = time.perf_counter() 171 | 172 | print(f'Execution Time {self.timer.get_current_time()} > selected QI: {self.qi.index(msg.get_quality_id())}') 173 | 174 | try: 175 | connection = http.client.HTTPConnection(host_name, port) 176 | connection.request('GET', path_name) 177 | ss_file = connection.getresponse().read() 178 | connection.close() 179 | except Exception as err: 180 | print('> Houston, we have a problem!') 181 | print(f'> trying to connecto to: {msg.get_payload()}') 182 | print(f'Execution Time {self.timer.get_current_time()} > msg obj: {msg}') 183 | print(err) 184 | exit(-1) 185 | 186 | msg.set_kind(MessageKind.SEGMENT_RESPONSE) 187 | 188 | decoded = False 189 | 190 | try: 191 | ss_file = ss_file.decode() 192 | except UnicodeDecodeError: 193 | # if wasn't possible to decode() is a ss 194 | msg.add_bit_length(8 * len(ss_file)) 195 | self.bandwidth_limitation(msg.get_bit_length()) 196 | decoded = True 197 | 198 | if not decoded and '404 Not Found' in ss_file: 199 | msg.set_found(False) 200 | 201 | self.send_up(msg) 202 | 203 | def handle_segment_size_response(self, msg): 204 | pass 205 | 206 | def handle_xml_response(self, msg): 207 | pass 208 | -------------------------------------------------------------------------------- /player/player.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | """ 3 | @author: Marcos F. Caetano (mfcaetano@unb.br) 11/03/2020 4 | 5 | @description: PyDash Project 6 | 7 | This is the player representation. It has the buffer and submit 8 | segments requests to the lower layers. The Payer stores 9 | the received segments in the buffer to be consumed later. 10 | Also "watches" the movie and compute the statistics. 11 | """ 12 | import glob 13 | import os 14 | import threading 15 | import time 16 | from matplotlib import pyplot as plt 17 | import statistics 18 | 19 | from base.configuration_parser import ConfigurationParser 20 | from base.message import * 21 | from base.simple_module import SimpleModule 22 | from base.timer import Timer 23 | from player.out_vector import OutVector 24 | from player.parser import * 25 | from base.whiteboard import Whiteboard 26 | 27 | ''' 28 | quality_id - Taxa em que o video foi codificado (46980bps, ..., 4726737bps) 29 | qi - indice de qualidade normalizado 30 | segment_id - número de sequência do arquivo de video 31 | 32 | Player is a Singleton class implementation 33 | 34 | ''' 35 | 36 | 37 | class Player(SimpleModule): 38 | 39 | def __init__(self, id): 40 | SimpleModule.__init__(self, id) 41 | 42 | config_parser = ConfigurationParser.get_instance() 43 | 44 | self.buffering_until = int(config_parser.get_parameter('buffering_until')) 45 | self.max_buffer_size = int(config_parser.get_parameter('max_buffer_size')) 46 | self.playback_step = int(config_parser.get_parameter('playbak_step')) 47 | self.url_mpd = config_parser.get_parameter('url_mpd') 48 | 49 | # last pause started at time 50 | self.pause_started_at = None 51 | self.pauses_number = 0 52 | 53 | # tag to verify if buffer has an minimal amount of data 54 | self.buffer_initialization = True 55 | 56 | # Does the player already started to download a segment? 57 | self.already_downloading = False 58 | 59 | # buffer itself 60 | self.buffer = [] 61 | 62 | # the buffer played position 63 | self.buffer_played = 0 64 | 65 | # history of what was played in buffer 66 | self.playback_history = [] 67 | 68 | # initialize with the first segment sequence number to download 69 | self.segment_id = 1 70 | 71 | self.parsed_mpd = '' 72 | self.qi = [] 73 | 74 | self.timer = Timer.get_instance() 75 | 76 | # threading playback 77 | self.playback_thread = threading.Thread(target=self.handle_video_playback) 78 | self.player_thread_events = threading.Event() 79 | self.lock = threading.Lock() 80 | self.kill_playback_thread = False 81 | 82 | self.request_time = 0 83 | 84 | self.playback_segment_size_time_at_buffer = [] 85 | self.playback_qi = OutVector() 86 | self.playback_quality_qi = OutVector() 87 | self.playback_pauses = OutVector() 88 | self.playback = OutVector() 89 | self.playback_buffer_size = OutVector() 90 | self.throughput = OutVector() 91 | 92 | self.whiteboard = Whiteboard.get_instance() 93 | self.whiteboard.add_playback_history(self.playback.get_items()) 94 | self.whiteboard.add_playback_qi(self.playback_qi.get_items()) 95 | self.whiteboard.add_playback_pauses(self.playback_pauses.get_items()) 96 | self.whiteboard.add_playback_buffer_size(self.playback_buffer_size.get_items()) 97 | self.whiteboard.add_buffer(self.buffer) 98 | self.whiteboard.add_playback_segment_size_time_at_buffer(self.playback_segment_size_time_at_buffer) 99 | self.whiteboard.add_max_buffer_size(self.max_buffer_size) 100 | 101 | def get_qi(self, quality_qi): 102 | return self.qi.index(quality_qi) 103 | 104 | def get_amount_of_video_to_play_without_lock(self): 105 | video_data = len(self.buffer) - self.buffer_played 106 | self.whiteboard.add_amount_video_to_play(video_data) 107 | return video_data 108 | 109 | def get_amount_of_video_to_play(self): 110 | self.lock.acquire() 111 | video_data = len(self.buffer) - self.buffer_played 112 | self.lock.release() 113 | self.whiteboard.add_amount_video_to_play(video_data) 114 | return video_data 115 | 116 | def is_there_something_to_play(self): 117 | return bool(self.get_amount_of_video_to_play() > 0) 118 | 119 | def get_current_playtime_position(self): 120 | self.lock.acquire() 121 | player_position = self.buffer_played 122 | self.lock.release() 123 | 124 | return player_position 125 | 126 | def get_buffer_size(self): 127 | self.lock.acquire() 128 | bs = len(self.buffer) 129 | self.lock.release() 130 | return bs 131 | 132 | # called function every time a segment was played 133 | def handle_video_playback(self): 134 | while True: 135 | self.lock.acquire() 136 | current_time = self.timer.get_current_time() 137 | buffer_size = self.get_amount_of_video_to_play_without_lock() 138 | # print(f'{current_time} player acordou') 139 | 140 | # there is something to play 141 | if buffer_size > 0: 142 | # player thread is sleeping. 143 | if buffer_size >= self.max_buffer_size and not self.already_downloading: 144 | print(f'{current_time} Acordar Player Thread!') 145 | self.player_thread_events.set() 146 | self.player_thread_events.clear() 147 | 148 | for i in range(self.playback_step): 149 | qi = self.buffer[self.buffer_played] 150 | self.playback_qi.add(current_time, qi) 151 | self.playback_quality_qi.add(current_time, self.qi[qi]) 152 | self.playback.add(current_time, 1) 153 | 154 | # compute the difference time from writing to read the segment in the buffer 155 | # self.playback_segment_size_time_at_buffer[self.buffer_played] -= current_time 156 | self.playback_segment_size_time_at_buffer[self.buffer_played][1] = current_time 157 | 158 | self.buffer_played += 1 159 | 160 | buffer_size = self.get_amount_of_video_to_play_without_lock() 161 | self.playback_buffer_size.add(current_time, buffer_size) 162 | print(f'Execution Time {current_time} > buffer size: {buffer_size}') 163 | 164 | if self.pause_started_at is not None: 165 | # pause_time = (time.time_ns() - self.pause_started_at) * 1e-9 166 | pause_time = current_time - self.pause_started_at 167 | self.playback_pauses.add(current_time, pause_time) 168 | self.pause_started_at = None 169 | else: 170 | # self.pause_started_at = time.time_ns() 171 | self.playback.add(current_time, 0) 172 | 173 | if self.pause_started_at is None: 174 | self.pauses_number += 1 175 | self.pause_started_at = current_time 176 | 177 | # update buffer_size 178 | buffer_size = self.get_amount_of_video_to_play_without_lock() 179 | self.lock.release() 180 | 181 | if (not threading.main_thread().is_alive() or self.kill_playback_thread) and buffer_size <= 0: 182 | print(f'Execution Time {current_time} thread {threading.get_ident()} will be killed.') 183 | break 184 | 185 | # playback steps 186 | # print(f'{current_time} player vai dormir') 187 | time.sleep(self.playback_step) 188 | 189 | def buffering_video_segment(self, msg): 190 | # buffer already stored the segment id 191 | buffer_size = self.get_buffer_size() 192 | if buffer_size >= ((msg.get_segment_id() - 1) * msg.get_segment_size() + 1): 193 | raise ValueError(f'buffer: {buffer_size}, {msg}') 194 | 195 | # adding the segment in the buffer 196 | self.store_in_buffer(self.get_qi(msg.get_quality_id()), msg.get_segment_size()) 197 | 198 | # statistical purpose 199 | current_time = self.timer.get_current_time() 200 | buffer_size = self.get_amount_of_video_to_play() 201 | self.playback_buffer_size.add(current_time, buffer_size) 202 | print(f'Execution Time {current_time} > buffer size: {buffer_size}') 203 | 204 | if self.buffer_initialization and self.get_amount_of_video_to_play() >= self.buffering_until: 205 | self.buffer_initialization = False 206 | print(f'Execution Time {self.timer.get_current_time()} buffering process is concluded') 207 | self.playback_thread.start() 208 | 209 | def store_in_buffer(self, qi, segment_size): 210 | self.lock.acquire() 211 | current_time = self.timer.get_current_time() 212 | 213 | for i in range(segment_size): 214 | self.buffer.append(qi) 215 | 216 | # logging the time the segment size was written in the buffer 217 | self.playback_segment_size_time_at_buffer.append([current_time, -1]) 218 | self.lock.release() 219 | 220 | def request_next_segment(self): 221 | if self.already_downloading: 222 | raise ValueError('Something doesn\'t look right, a segment is already being downloaded!') 223 | 224 | self.request_time = time.perf_counter() 225 | # self.request_time = self.timer.get_current_time() 226 | segment_request = SSMessage(MessageKind.SEGMENT_REQUEST) 227 | 228 | url_tokens = self.url_mpd.split('/') 229 | 230 | segment_request.add_host_name(url_tokens[2]) 231 | segment_request.add_path_name('/'.join(url_tokens[:len(url_tokens) - 1])) 232 | segment_request.add_media_mpd(navigate_mpd(self.parsed_mpd, 'media')[1]) 233 | segment_request.add_segment_id(self.segment_id) 234 | 235 | self.segment_id += 1 236 | 237 | # set status to downloading a segment 238 | self.already_downloading = True 239 | 240 | print(f'Execution Time {self.timer.get_current_time()} > request: {segment_request}') 241 | 242 | self.send_down(segment_request) 243 | 244 | def initialize(self): 245 | # starting the application downloading mdp file 246 | xml_request = Message(MessageKind.XML_REQUEST, self.url_mpd) 247 | self.send_down(xml_request) 248 | 249 | def finalization(self): 250 | 251 | print(f'Pauses number: {self.pauses_number}') 252 | 253 | if self.pauses_number > 1: 254 | pauses = [i[1] for i in self.playback_pauses.get_items()] 255 | print(f' >> Average Time Pauses: {round(statistics.mean(pauses), 2)}') 256 | print(f' >> Standard deviation: {round(statistics.stdev(pauses), 2)}') 257 | print(f' >> Variance: {round(statistics.variance(pauses), 2)}') 258 | 259 | playback_qi = [i[1] for i in self.playback_qi.get_items()] 260 | 261 | if len(playback_qi) > 1: 262 | print(f'Average QI: {round(statistics.mean(playback_qi), 2)}') 263 | print(f' >> Standard deviation: {round(statistics.stdev(playback_qi), 2)}') 264 | print(f' >> Variance: {round(statistics.variance(playback_qi), 2)}') 265 | 266 | diff = [] 267 | for i in range(len(playback_qi) - 1): 268 | diff.append(abs(playback_qi[i + 1] - playback_qi[i])) 269 | 270 | if len(diff) > 1: 271 | print(f'Average QI distance: {round(statistics.mean(diff), 2)}') 272 | print(f' >> Standard deviation: {round(statistics.stdev(diff), 2)}') 273 | print(f' >> Variance: {round(statistics.variance(diff), 2)}') 274 | 275 | [os.remove(f) for f in glob.glob('./results/*.png')] 276 | self.logging_all_statistics() 277 | 278 | def handle_xml_response(self, msg): 279 | self.parsed_mpd = parse_mpd(msg.get_payload()) 280 | self.qi = self.parsed_mpd.get_qi() 281 | self.request_next_segment() 282 | 283 | def handle_segment_size_response(self, msg): 284 | 285 | # set status to not downloading a segment 286 | self.already_downloading = False 287 | 288 | current_time = self.timer.get_current_time() 289 | print(f'Execution Time {current_time} > received: {msg}') 290 | 291 | if msg.found(): 292 | measured_throughput = msg.get_bit_length() / (time.perf_counter() - self.request_time) 293 | self.throughput.add(current_time, measured_throughput) 294 | 295 | print(f'Execution Time {self.timer.get_current_time()} > measured throughput: {measured_throughput}') 296 | 297 | # self.throughput.add(current_time, msg.get_bit_length() /(current_time - self.request_time)) 298 | self.buffering_video_segment(msg) 299 | 300 | # still have space in buffer to download next ss 301 | if self.get_amount_of_video_to_play() >= self.max_buffer_size: 302 | print( 303 | f'Execution Time {current_time} Maximum buffer size is achieved... the principal process will sleep now.') 304 | self.player_thread_events.wait() 305 | 306 | self.request_next_segment() 307 | 308 | ''' 309 | if not self.is_buffer_achieve_max_size(): 310 | self.request_next_segment() 311 | else: 312 | print('terminou o download... vamos encerrar') 313 | self.kill_playback_thread = True 314 | self.playback_thread.join() 315 | ''' 316 | else: 317 | print(f'Execution Time {current_time} All video\'s segments was downloaded') 318 | self.kill_playback_thread = True 319 | if self.playback_thread.is_alive(): 320 | self.playback_thread.join() 321 | 322 | def __multiplication_factor(self, values: list): 323 | units = ['Bps', 'Kbps', 'Mbps', 'Gbps', 'Tbps'] 324 | mult = [1, 1e3, 1e6, 1e9, 1e12] 325 | # find the maximum value 326 | v = 0 327 | for i in range(len(values)): 328 | if values[i][1] > v: 329 | v = values[i][1] 330 | 331 | # find the maximum multiplication factor 332 | index = 0 333 | for i in mult: 334 | # cannot be zero 335 | if int(v) // (int(i) * 1000) == 0: 336 | break 337 | index += 1 338 | return mult[index], units[index] 339 | 340 | def logging_all_statistics(self): 341 | 342 | #fact = self.__multiplication_factor(self.playback_quality_qi.items) 343 | #self.playback_quality_qi.items = [(x, i / fact[0]) for x, i in self.playback_quality_qi.items] 344 | 345 | 346 | fact = self.__multiplication_factor(self.throughput.items) 347 | self.throughput.items = [(x, i / fact[0]) for x, i in self.throughput.items] 348 | self.logVlines(self.throughput, 'throughput', 'Throughput Variation', fact[1]) 349 | 350 | self.log(self.playback_quality_qi, 'playback_quality_qi', 'Quality QI', 'Mbps') 351 | self.log(self.playback_pauses, 'playback_pauses', 'Pauses Size (seconds)', 'Pauses Size') 352 | self.log(self.playback, 'playback', 'Playback History', 'on/off') 353 | self.log(self.playback_qi, 'playback_qi', 'Quality Index', 'QI') 354 | self.log(self.playback_buffer_size, 'playback_buffer_size', 'Buffer Size', 'seconds') 355 | 356 | def log(self, log, file_name, title, y_axis, x_axis='execution time (s)'): 357 | items = log.items 358 | 359 | if len(items) == 0: 360 | return 361 | 362 | x = [] 363 | y = [] 364 | for i in range(len(items)): 365 | x.append(items[i][0]) 366 | y.append(items[i][1]) 367 | 368 | plt.plot(x, y, label=file_name) 369 | plt.xlabel(x_axis) 370 | plt.ylabel(y_axis) 371 | plt.title(title) 372 | plt.ylim(min(y), max(y) * 4 / 3) 373 | 374 | plt.savefig(f'./results/{file_name}.png') 375 | plt.clf() 376 | plt.cla() 377 | plt.close() 378 | 379 | def logVlines(self, log, file_name, title, y_axis, x_axis='execution time (s)'): 380 | items = log.items 381 | 382 | if len(items) == 0: 383 | return 384 | 385 | x = [] 386 | y = [] 387 | for i in range(len(items)): 388 | x.append(items[i][0]) 389 | y.append(items[i][1]) 390 | 391 | _, ax = plt.subplots() 392 | ax.vlines(x, [0], y, color='brown') 393 | 394 | plt.title(file_name) 395 | plt.xlabel(x_axis) 396 | plt.ylabel(y_axis) 397 | plt.title(title) 398 | plt.ylim(0, max(y) * 4 / 3) 399 | 400 | plt.savefig(f'./results/{file_name}.png') 401 | plt.clf() 402 | plt.cla() 403 | plt.close() 404 | 405 | def handle_xml_request(self, msg): 406 | # not applied 407 | pass 408 | 409 | def handle_segment_size_request(self, msg): 410 | # not applied 411 | pass 412 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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You may not convey a covered 525 | work if you are a party to an arrangement with a third party that is 526 | in the business of distributing software, under which you make payment 527 | to the third party based on the extent of your activity of conveying 528 | the work, and under which the third party grants, to any of the 529 | parties who would receive the covered work from you, a discriminatory 530 | patent license (a) in connection with copies of the covered work 531 | conveyed by you (or copies made from those copies), or (b) primarily 532 | for and in connection with specific products or compilations that 533 | contain the covered work, unless you entered into that arrangement, 534 | or that patent license was granted, prior to 28 March 2007. 535 | 536 | Nothing in this License shall be construed as excluding or limiting 537 | any implied license or other defenses to infringement that may 538 | otherwise be available to you under applicable patent law. 539 | 540 | 12. No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------