def start_playback_smart(dp_object, domain, playback_type=None, download=False, video_segment_duration=None, duration=120):
global PLAYER
""" Module that downloads the MPD-FIle and download
all the representations of the Module to download
the MPEG-DASH media.
Example: start_playback_smart(dp_object, domain, "SMART", DOWNLOAD, video_segment_duration)
:param dp_object: The DASH-playback object
:param domain: The domain name of the server (The segment URLS are domain + relative_address)
:param playback_type: The type of playback
1. 'BASIC' - The basic adapataion scheme
2. 'SARA' - Segment Aware Rate Adaptation
3. 'NETFLIX' - Buffer based adaptation used by Netflix
:param download: Set to True if the segments are to be stored locally (Boolean). Default False
:param video_segment_duration: Playback duratoin of each segment
:return:
"""
print("START_PLAYBACK_SMART:DOMAIN=" + domain)
# Initialize the DASH buffer
dash_player = dash_buffer.DashPlayer(dp_object.playback_duration, video_segment_duration)
PLAYER = dash_player
global PLAYBACK_TIME
PLAYBACK_TIME = duration
dash_event_logger.init(0, PLAYER, 'unknown', MPD , 'AStream', 'standard',)
dash_event_logger.setBufferLevelProvider()
dash_player.start()
# A folder to save the segments in
file_identifier = id_generator()
config_dash.LOG.info("The segments are stored in %s" % file_identifier)
dp_list = defaultdict(defaultdict)
# Creating a Dictionary of all that has the URLs for each segment and different bitrates
for bitrate in dp_object.video:
# Getting the URL list for each bitrate
dp_object.video[bitrate] = read_mpd.get_url_list(dp_object.video[bitrate], video_segment_duration,
dp_object.playback_duration, bitrate)
if "$Bandwidth$" in dp_object.video[bitrate].initialization:
dp_object.video[bitrate].initialization = dp_object.video[bitrate].initialization.replace(
"$Bandwidth$", str(bitrate))
media_urls = [dp_object.video[bitrate].initialization] + dp_object.video[bitrate].url_list
for segment_count, segment_url in enumerate(media_urls, dp_object.video[bitrate].start):
# segment_duration = dp_object.video[bitrate].segment_duration
dp_list[segment_count][bitrate] = segment_url
bitrates = dp_object.video.keys()
bitrates.sort()
average_dwn_time = 0
segment_files = []
# For basic adaptation
previous_segment_times = []
recent_download_sizes = []
weighted_mean_object = None
current_bitrate = bitrates[0]
previous_bitrate = None
total_downloaded = 0
# Delay in terms of the number of segments
delay = 0
segment_duration = 0
segment_size = segment_download_time = None
# Netflix Variables
average_segment_sizes = netflix_rate_map = None
netflix_state = "INITIAL"
# Start playback of all the segments
#dash_event_logger.startupDelay(time.time() - PLAYER.actual_start_time)
for segment_number, segment in enumerate(dp_list, dp_object.video[current_bitrate].start):
config_dash.LOG.info(" {}: Processing the segment {}".format(playback_type.upper(), segment_number))
write_json()
if not previous_bitrate:
previous_bitrate = current_bitrate
if SEGMENT_LIMIT:
if not dash_player.segment_limit:
dash_player.segment_limit = int(SEGMENT_LIMIT)
if segment_number > int(SEGMENT_LIMIT):
config_dash.LOG.info("Segment limit reached")
break
if segment_number == dp_object.video[bitrate].start:
current_bitrate = bitrates[0]
else:
if playback_type.upper() == "BASIC":
current_bitrate, average_dwn_time = basic_dash2.basic_dash2(segment_number, bitrates, average_dwn_time,
recent_download_sizes,
previous_segment_times, current_bitrate)
if dash_player.buffer.qsize() > config_dash.BASIC_THRESHOLD:
delay = dash_player.buffer.qsize() - config_dash.BASIC_THRESHOLD
config_dash.LOG.info("Basic-DASH: Selected {} for the segment {}".format(current_bitrate,
segment_number + 1))
elif playback_type.upper() == "SMART":
if not weighted_mean_object:
weighted_mean_object = WeightedMean(config_dash.SARA_SAMPLE_COUNT)
config_dash.LOG.debug("Initializing the weighted Mean object")
# Checking the segment number is in acceptable range
if segment_number < len(dp_list) - 1 + dp_object.video[bitrate].start:
try:
current_bitrate, delay = weighted_dash.weighted_dash(bitrates, dash_player,
weighted_mean_object.weighted_mean_rate,
current_bitrate,
get_segment_sizes(dp_object,
segment_number+1))
except IndexError, e:
config_dash.LOG.error(e)
elif playback_type.upper() == "NETFLIX":
config_dash.LOG.info("Playback is NETFLIX")
# Calculate the average segment sizes for each bitrate
if not average_segment_sizes:
average_segment_sizes = get_average_segment_sizes(dp_object)
if segment_number < len(dp_list) - 1 + dp_object.video[bitrate].start:
try:
if segment_size and segment_download_time:
segment_download_rate = segment_size / segment_download_time
else:
segment_download_rate = 0
current_bitrate, netflix_rate_map, netflix_state = netflix_dash.netflix_dash(
bitrates, dash_player, segment_download_rate, current_bitrate, average_segment_sizes,
netflix_rate_map, netflix_state)
config_dash.LOG.info("NETFLIX: Next bitrate = {}".format(current_bitrate))
except IndexError, e:
config_dash.LOG.error(e)
else:
config_dash.LOG.critical("Completed segment playback for Netflix")
break
# If the buffer is full wait till it gets empty
if dash_player.buffer.qsize() >= config_dash.NETFLIX_BUFFER_SIZE:
delay = (dash_player.buffer.qsize() - config_dash.NETFLIX_BUFFER_SIZE + 1) * segment_duration
config_dash.LOG.info("NETFLIX: delay = {} seconds".format(delay))
def start_playback_smart(dp_object,
domain,
playback_type=None,
download=False,
video_segment_duration=None,
connection_type="",
JUMP_SCENARIO=""):
""" Module that downloads the MPD-FIle and download
all the representations of the Module to download
the MPEG-DASH media.
Example: start_playback_smart(dp_object, domain, "SMART", DOWNLOAD, video_segment_duration)
:param dp_object: The DASH-playback object
:param domain: The domain name of the server (The segment URLS are domain + relative_address)
:param playback_type: The type of playback
1. 'BASIC' - The basic adapataion scheme
2. 'SARA' - Segment Aware Rate Adaptation
3. 'NETFLIX' - Buffer based adaptation used by Netflix
:param download: Set to True if the segments are to be stored locally (Boolean). Default False
:param video_segment_duration: Playback duratoin of each segment
:return:
"""
# Initialize the DASH buffer
dash_player = dash_buffer.DashPlayer(dp_object.playback_duration,
video_segment_duration,
connection_type)
dash_player.start()
# A folder to save the segments in
file_identifier = 'URLLIB_' #id_generator()
config_dash.LOG.info("The segments are stored in %s" % file_identifier)
dp_list = defaultdict(defaultdict)
# Creating a Dictionary of all that has the URLs for each segment and different bitrates
for bitrate in dp_object.video:
# Getting the URL list for each bitrate
dp_object.video[bitrate] = read_mpd.get_url_list(
dp_object.video[bitrate], video_segment_duration,
dp_object.playback_duration, bitrate)
if "$Bandwidth$" in dp_object.video[bitrate].initialization:
dp_object.video[bitrate].initialization = dp_object.video[
bitrate].initialization.replace("$Bandwidth$", str(bitrate))
media_urls = [dp_object.video[bitrate].initialization
] + dp_object.video[bitrate].url_list
for segment_count, segment_url in enumerate(
media_urls, dp_object.video[bitrate].start):
# segment_duration = dp_object.video[bitrate].segment_duration
dp_list[segment_count][bitrate] = segment_url
# print segment_count,bitrate,segment_url
bitrates = dp_object.video.keys()
bitrates.sort()
average_dwn_time = 0
segment_files = []
# For basic adaptation
previous_segment_times = []
recent_download_sizes = []
weighted_mean_object = None
current_bitrate = bitrates[0]
previous_bitrate = None
total_downloaded = 0
# Delay in terms of the number of segments
delay = 0
segment_duration = 0
segment_size = segment_download_time = None
# Netflix Variables
average_segment_sizes = netflix_rate_map = None
netflix_state = "INITIAL"
sb = None
global JUMP_BUFFER_COUNTER
JUMP_BUFFER_COUNTER = 0
# Start playback of all the segments
"""
for segment1 in dp_list.keys():
for bitrate1 in dp_list[segment1]:
print segment1, bitrate1, dp_list[segment1][bitrate1]
"""
if (CURL or QUIC): # CURL or QUIC client
""" CURL or QUIC client Module to download the segment """
if CURL:
CMD = config_dash.CURL_CLIENT_CMD
print CMD
if QUIC:
CMD = config_dash.QUIC_CLIENT_CMD
print CMD
sb = Popen(CMD, shell=True, stdout=PIPE, stdin=PIPE, stderr=STDOUT)
while True:
out = non_block_read(
sb.stdout) # will return '' instead of hanging for ever
if "started" in out:
print out
break
max_jump_count = 0
current_jump_index = 0
if JUMP:
JUMP_SCENARIO_ARR = JUMP_SCENARIO.split(',')
max_jump_count = len(JUMP_SCENARIO_ARR)
total_segment_count = len(dp_list)
segment_number = 1
while segment_number <= total_segment_count:
config_dash.LOG.info("*************** segment_number:" +
str(segment_number) + "*********************")
config_dash.LOG.info(" {}: Processing the segment {}".format(
playback_type.upper(), segment_number))
write_json()
if not previous_bitrate:
previous_bitrate = current_bitrate
if SEGMENT_LIMIT:
if not dash_player.segment_limit:
dash_player.segment_limit = int(SEGMENT_LIMIT)
if segment_number > int(SEGMENT_LIMIT):
config_dash.LOG.info("Segment limit reached")
break
if segment_number == dp_object.video[bitrate].start:
current_bitrate = bitrates[0]
else:
if playback_type.upper() == "BASIC":
current_bitrate, average_dwn_time = basic_dash2.basic_dash2(
segment_number, bitrates, average_dwn_time,
recent_download_sizes, previous_segment_times,
current_bitrate)
if dash_player.buffer.qsize() > config_dash.BASIC_THRESHOLD:
delay = dash_player.buffer.qsize(
) - config_dash.BASIC_THRESHOLD
config_dash.LOG.info(
"Basic-DASH: Selected {} for the segment {}".format(
current_bitrate, segment_number + 1))
elif playback_type.upper() == "SMART":
if not weighted_mean_object:
weighted_mean_object = WeightedMean(
config_dash.SARA_SAMPLE_COUNT)
config_dash.LOG.debug(
"Initializing the weighted Mean object")
# Checking the segment number is in acceptable range
if segment_number < len(
dp_list) - 1 + dp_object.video[bitrate].start:
try:
config_dash.LOG.info("JUMP_BUFFER_COUNTER: %s",
str(JUMP_BUFFER_COUNTER))
current_bitrate, delay, JUMP_BUFFER_COUNTER = weighted_dash.weighted_dash(
bitrates, dash_player,
weighted_mean_object.weighted_mean_rate,
current_bitrate,
get_segment_sizes(dp_object, segment_number + 1),
JUMP_BUFFER_COUNTER)
except IndexError, e:
config_dash.LOG.error(e)
elif playback_type.upper() == "NETFLIX":
config_dash.LOG.info("Playback is NETFLIX")
# Calculate the average segment sizes for each bitrate
if not average_segment_sizes:
average_segment_sizes = get_average_segment_sizes(
dp_object)
if segment_number < len(
dp_list) - 1 + dp_object.video[bitrate].start:
try:
if segment_size and segment_download_time:
segment_download_rate = segment_size / segment_download_time
else:
segment_download_rate = 0
config_dash.LOG.info("JUMP_BUFFER_COUNTER: %s",
str(JUMP_BUFFER_COUNTER))
current_bitrate, netflix_rate_map, netflix_state, JUMP_BUFFER_COUNTER = netflix_dash.netflix_dash(
bitrates, dash_player, segment_download_rate,
current_bitrate, average_segment_sizes,
netflix_rate_map, netflix_state,
JUMP_BUFFER_COUNTER)
config_dash.LOG.info(
"NETFLIX: Next bitrate = {}".format(
current_bitrate))
except IndexError, e:
config_dash.LOG.error(e)
else:
config_dash.LOG.critical(
"Completed segment playback for Netflix")
break
# If the buffer is full wait till it gets empty
if dash_player.buffer.qsize(
) >= config_dash.NETFLIX_BUFFER_SIZE:
delay = (dash_player.buffer.qsize() -
config_dash.NETFLIX_BUFFER_SIZE +
1) * segment_duration
config_dash.LOG.info(
"NETFLIX: delay = {} seconds".format(delay))
def start_playback_smart(dp_object,
domain,
playback_type=None,
download=False,
video_segment_duration=None,
retrans=False):
""" Module that downloads the MPD-FIle and download
all the representations of the Module to download
the MPEG-DASH media.
Example: start_playback_smart(dp_object, domain, "SMART", DOWNLOAD, video_segment_duration)
:param dp_object: The DASH-playback object
:param domain: The domain name of the server (The segment URLS are domain + relative_address)
:param playback_type: The type of playback
1. 'BASIC' - The basic adapataion scheme
2. 'SARA' - Segment Aware Rate Adaptation
3. 'NETFLIX' - Buffer based adaptation used by Netflix
4. 'VLC' - VLC adaptation scheme
:param download: Set to True if the segments are to be stored locally (Boolean). Default False
:param video_segment_duration: Playback duratoin of each segment
:return:
"""
# Initialize the DASH buffer
video_segment_duration = 2
dash_player = dash_buffer.DashPlayer(dp_object.playback_duration,
video_segment_duration)
start_dload_time = timeit.default_timer()
dash_player.start()
# A folder to save the segments in
file_identifier = id_generator()
config_dash.LOG.info("The segments are stored in %s" % file_identifier)
dp_list = defaultdict(defaultdict)
# Creating a Dictionary of all that has the URLs for each segment and different bitrates
for bitrate in dp_object.video:
# Getting the URL list for each bitrate
dp_object.video[bitrate] = read_mpd.get_url_list(
dp_object.video[bitrate], video_segment_duration,
dp_object.playback_duration, bitrate)
if "$Bandwidth$" in dp_object.video[bitrate].initialization:
dp_object.video[bitrate].initialization = dp_object.video[
bitrate].initialization.replace("$Bandwidth$", str(bitrate))
media_urls = [dp_object.video[bitrate].initialization
] + dp_object.video[bitrate].url_list
for segment_count, segment_url in enumerate(
media_urls, dp_object.video[bitrate].start):
# segment_duration = dp_object.video[bitrate].segment_duration
dp_list[segment_count][bitrate] = segment_url
bitrates = dp_object.video.keys()
bitrates.sort()
average_dwn_time = 0
segment_files = []
# For basic adaptation
global segment_w_chunks
init_dl_start_time = timeit.default_timer()
segment_w_chunks = []
previous_segment_times = []
recent_download_sizes = []
bitrate_history = []
#segment_dl_rates = []
weighted_mean_object = None
current_bitrate = bitrates[0]
previous_bitrate = None
total_downloaded = 0
bitrate_holder = 0
dl_rate_history = []
# Delay in terms of the number of segments
delay = 0
segment_duration = 0
segment_size = segment_download_time = None
# Netflix Variables
average_segment_sizes = netflix_rate_map = None
netflix_state = "INITIAL"
RETRANSMISSION_SWITCH = False
retransmission_delay = 0
retransmission_delay_switch = False
# Start playback of all the segments
#for segment_number, segment in enumerate(dp_list, dp_object.video[current_bitrate].start):
#for segment_number in dp_list:s
segment_number = 1
original_segment_number = 1
while segment_number < len(dp_list):
if retransmission_delay_switch == True:
#segment_number = original_segment_number
retransmission_delay_switch = False
segment = segment_number
#print len(dp_list)
#print "dp_list"
#print segment
#print segment_number
#print "++++++++++++"
config_dash.LOG.info(" {}: Processing the segment {}".format(
playback_type.upper(), segment_number))
write_json()
if not previous_bitrate:
previous_bitrate = current_bitrate
if SEGMENT_LIMIT:
if not dash_player.segment_limit:
dash_player.segment_limit = int(SEGMENT_LIMIT)
if segment_number > int(SEGMENT_LIMIT):
config_dash.LOG.info("Segment limit reached")
break
if segment_number == dp_object.video[bitrate].start:
current_bitrate = bitrates[0]
else:
if playback_type.upper() == "BASIC":
current_bitrate, average_dwn_time = basic_dash2.basic_dash2(
segment_number, bitrates, average_dwn_time,
recent_download_sizes, previous_segment_times,
current_bitrate)
# if dash_player.buffer.qsize() > config_dash.BASIC_THRESHOLD:
if dash_player.buffer.__len__(
) > config_dash.BASIC_THRESHOLD: #MZ
# delay = dash_player.buffer.qsize() - config_dash.BASIC_THRESHOLD
delay = dash_player.buffer.__len__(
) - config_dash.BASIC_THRESHOLD #MZ
config_dash.LOG.info(
"Basic-DASH: Selected {} for the segment {}".format(
current_bitrate, segment_number + 1))
elif playback_type.upper() == "SMART":
if not weighted_mean_object:
weighted_mean_object = WeightedMean(
config_dash.SARA_SAMPLE_COUNT)
config_dash.LOG.debug(
"Initializing the weighted Mean object")
# Checking the segment number is in acceptable range
segment_download_rate = segment_size / segment_download_time
if segment_number < len(
dp_list) - 1 + dp_object.video[bitrate].start:
try:
current_bitrate, delay = weighted_dash.weighted_dash(
bitrates, dash_player,
weighted_mean_object.weighted_mean_rate,
current_bitrate, segment_number, segment_size,
segment_download_time,
get_segment_sizes(dp_object, segment_number + 1))
except IndexError, e:
config_dash.LOG.error(e)
#with open('sara-dash-chosen-rate.txt', 'a') as sara:
#sara.write(str(current_bitrate) + '\t' + str(segment_download_rate) + '\n')
if not os.path.exists(download_log_file):
header_row = "EpochTime, CurrentBufferSize, Bitrate, DownloadRate".split(
",")
stats = ((timeit.default_timer() - start_dload_time),
str(dash_player.buffer.__len__()),
current_bitrate, segment_download_rate)
else:
header_row = None
stats = ((timeit.default_timer() - start_dload_time),
str(dash_player.buffer.__len__()),
current_bitrate, segment_download_rate)
str_stats = [str(i) for i in stats]
with open(download_log_file, "ab") as log_file_handle:
result_writer = csv.writer(log_file_handle, delimiter=",")
if header_row:
result_writer.writerow(header_row)
result_writer.writerow(str_stats)
elif playback_type.upper() == "NETFLIX":
config_dash.LOG.info("Playback is NETFLIX")
# Calculate the average segment sizes for each bitrate
if not average_segment_sizes:
average_segment_sizes = get_average_segment_sizes(
dp_object)
if segment_number < len(
dp_list) - 1 + dp_object.video[bitrate].start:
try:
if segment_size and segment_download_time:
segment_download_rate = segment_size / segment_download_time
else:
segment_download_rate = 0
current_bitrate, netflix_rate_map, netflix_state = netflix_dash.netflix_dash(
bitrates, dash_player, segment_download_rate,
current_bitrate, average_segment_sizes,
netflix_rate_map, netflix_state)
config_dash.LOG.info(
"NETFLIX: Next bitrate = {}".format(
current_bitrate))
except IndexError, e:
config_dash.LOG.error(e)
else:
config_dash.LOG.critical(
"Completed segment playback for Netflix")
break
if not os.path.exists(download_log_file):
header_row = "EpochTime, CurrentBufferSize, Bitrate, DownloadRate".split(
",")
stats = (timeit.default_timer() - start_dload_time,
str(dash_player.buffer.__len__()),
current_bitrate, segment_download_rate)
else:
header_row = None
stats = (timeit.default_timer() - start_dload_time,
str(dash_player.buffer.__len__()),
current_bitrate, segment_download_rate)
str_stats = [str(i) for i in stats]
with open(download_log_file, "ab") as log_file_handle:
result_writer = csv.writer(log_file_handle, delimiter=",")
if header_row:
result_writer.writerow(header_row)
result_writer.writerow(str_stats)
# If the buffer is full wait till it gets empty
# if dash_player.buffer.qsize() >= config_dash.NETFLIX_BUFFER_SIZE:
if dash_player.buffer.__len__(
) >= config_dash.NETFLIX_BUFFER_SIZE: #MZ
# delay = (dash_player.buffer.qsize() - config_dash.NETFLIX_BUFFER_SIZE + 1) * segment_duration
delay = (dash_player.buffer.__len__() -
config_dash.NETFLIX_BUFFER_SIZE +
1) * segment_duration #MZ
config_dash.LOG.info(
"NETFLIX: delay = {} seconds".format(delay))
def start_playback_smart(dp_object,
domain,
playback_type=None,
download=False,
video_segment_duration=None):
""" Module that downloads the MPD-FIle and download
all the representations of the Module to download
the MPEG-DASH media.
Example: start_playback_smart(dp_object, domain, "SMART", DOWNLOAD, video_segment_duration)
:param dp_object: The DASH-playback object
:param domain: The domain name of the server (The segment URLS are domain + relative_address)
:param playback_type: The type of playback
1. 'BASIC' - The basic adapataion scheme
2. 'SARA' - Segment Aware Rate Adaptation
3. 'NETFLIX' - Buffer based adaptation used by Netflix
:param download: Set to True if the segments are to be stored locally (Boolean). Default False
:param video_segment_duration: Playback duratoin of each segment
:return:
"""
# Initialize the DASH buffer
dash_player = dash_buffer.DashPlayer(dp_object.playback_duration,
video_segment_duration)
dash_player.start()
# A folder to save the segments in
file_identifier = id_generator()
config_dash.LOG.info("The segments are stored in %s" % file_identifier)
dp_list = defaultdict(defaultdict)
# Creating a Dictionary of all that has the URLs for each segment and different bitrates
for bitrate in dp_object.video:
# Getting the URL list for each bitrate
dp_object.video[bitrate] = read_mpd.get_url_list(
dp_object.video[bitrate], video_segment_duration,
dp_object.playback_duration, bitrate)
if "$Bandwidth$" in dp_object.video[bitrate].initialization:
dp_object.video[bitrate].initialization = dp_object.video[
bitrate].initialization.replace("$Bandwidth$", str(bitrate))
media_urls = [dp_object.video[bitrate].initialization
] + dp_object.video[bitrate].url_list
#print "media urls"
#print media_urls
for segment_count, segment_url in enumerate(
media_urls, dp_object.video[bitrate].start):
# segment_duration = dp_object.video[bitrate].segment_duration
#print "segment url"
#print segment_url
dp_list[segment_count][bitrate] = segment_url
bitrates = list(dp_object.video.keys())
bitrates.sort()
average_dwn_time = 0
segment_files = []
# For basic adaptation
previous_segment_times = []
recent_download_sizes = []
weighted_mean_object = None
current_bitrate = bitrates[0]
previous_bitrate = None
total_downloaded = 0
# Delay in terms of the number of segments
delay = 0
segment_duration = 0
segment_size = segment_download_time = None
# Netflix Variables
average_segment_sizes = netflix_rate_map = None
netflix_state = "INITIAL"
# Start playback of all the segments
for segment_number, segment in enumerate(
dp_list, dp_object.video[current_bitrate].start):
config_dash.LOG.info(" {}: Processing the segment {}".format(
playback_type.upper(), segment_number))
write_json()
if not previous_bitrate:
previous_bitrate = current_bitrate
if SEGMENT_LIMIT:
if not dash_player.segment_limit:
dash_player.segment_limit = int(SEGMENT_LIMIT)
if segment_number > int(SEGMENT_LIMIT):
config_dash.LOG.info("Segment limit reached")
break
print(("segment_number ={}".format(segment_number)))
print(("dp_object.video[bitrate].start={}".format(
dp_object.video[bitrate].start)))
if segment_number == dp_object.video[bitrate].start:
current_bitrate = bitrates[0]
else:
if playback_type.upper() == "BASIC":
current_bitrate, average_dwn_time = basic_dash2.basic_dash2(
segment_number, bitrates, average_dwn_time,
recent_download_sizes, previous_segment_times,
current_bitrate)
if dash_player.buffer.qsize() > config_dash.BASIC_THRESHOLD:
delay = dash_player.buffer.qsize(
) - config_dash.BASIC_THRESHOLD
config_dash.LOG.info(
"Basic-DASH: Selected {} for the segment {}".format(
current_bitrate, segment_number + 1))
elif playback_type.upper() == "SMART":
if not weighted_mean_object:
weighted_mean_object = WeightedMean(
config_dash.SARA_SAMPLE_COUNT)
config_dash.LOG.debug(
"Initializing the weighted Mean object")
# Checking the segment number is in acceptable range
if segment_number < len(
dp_list) - 1 + dp_object.video[bitrate].start:
try:
current_bitrate, delay = weighted_dash.weighted_dash(
bitrates, dash_player,
weighted_mean_object.weighted_mean_rate,
current_bitrate,
get_segment_sizes(dp_object, segment_number + 1))
except (IndexError, e):
config_dash.LOG.error(e)
elif playback_type.upper() == "NETFLIX":
config_dash.LOG.info("Playback is NETFLIX")
# Calculate the average segment sizes for each bitrate
if not average_segment_sizes:
average_segment_sizes = get_average_segment_sizes(
dp_object)
if segment_number < len(
dp_list) - 1 + dp_object.video[bitrate].start:
try:
if segment_size and segment_download_time:
segment_download_rate = segment_size / segment_download_time
else:
segment_download_rate = 0
current_bitrate, netflix_rate_map, netflix_state = netflix_dash.netflix_dash(
bitrates, dash_player, segment_download_rate,
current_bitrate, average_segment_sizes,
netflix_rate_map, netflix_state)
config_dash.LOG.info(
"NETFLIX: Next bitrate = {}".format(
current_bitrate))
except (IndexError, e):
config_dash.LOG.error(e)
else:
config_dash.LOG.critical(
"Completed segment playback for Netflix")
break
# If the buffer is full wait till it gets empty
if dash_player.buffer.qsize(
) >= config_dash.NETFLIX_BUFFER_SIZE:
delay = (dash_player.buffer.qsize() -
config_dash.NETFLIX_BUFFER_SIZE +
1) * segment_duration
config_dash.LOG.info(
"NETFLIX: delay = {} seconds".format(delay))
else:
config_dash.LOG.error(
"Unknown playback type:{}. Continuing with basic playback".
format(playback_type))
current_bitrate, average_dwn_time = basic_dash.basic_dash(
segment_number, bitrates, average_dwn_time,
segment_download_time, current_bitrate)
segment_path = dp_list[segment][current_bitrate]
#print "domain"
#print domain
#print "segment"
#print segment
#print "current bitrate"
#print current_bitrate
#print segment_path
segment_url = urljoin(domain, segment_path)
#print "segment url"
#print segment_url
config_dash.LOG.info("{}: Segment URL = {}".format(
playback_type.upper(), segment_url))
if delay:
delay_start = time.time()
config_dash.LOG.info("SLEEPING for {}seconds ".format(
delay * segment_duration))
while time.time() - delay_start < (delay * segment_duration):
time.sleep(1)
delay = 0
config_dash.LOG.debug("SLEPT for {}seconds ".format(time.time() -
delay_start))
start_time = timeit.default_timer()
try:
#print 'url'
#print segment_url
#print 'file'
#print file_identifier
segment_size, segment_filename = download_segment(
segment_url, file_identifier)
config_dash.LOG.info("{}: Downloaded segment {}".format(
playback_type.upper(), segment_url))
except (IOError, e):
config_dash.LOG.error("Unable to save segment %s" % e)
return None
segment_download_time = timeit.default_timer() - start_time
previous_segment_times.append(segment_download_time)
recent_download_sizes.append(segment_size)
# Updating the JSON information
segment_name = os.path.split(segment_url)[1]
if "segment_info" not in config_dash.JSON_HANDLE:
config_dash.JSON_HANDLE["segment_info"] = list()
config_dash.JSON_HANDLE["segment_info"].append(
(segment_name, current_bitrate, segment_size,
segment_download_time))
total_downloaded += segment_size
config_dash.LOG.info(
"{} : The total downloaded = {}, segment_size = {}, segment_number = {}"
.format(playback_type.upper(), total_downloaded, segment_size,
segment_number))
if playback_type.upper() == "SMART" and weighted_mean_object:
weighted_mean_object.update_weighted_mean(segment_size,
segment_download_time)
segment_info = {
'playback_length': video_segment_duration,
'size': segment_size,
'bitrate': current_bitrate,
'data': segment_filename,
'URI': segment_url,
'segment_number': segment_number
}
segment_duration = segment_info['playback_length']
dash_player.write(segment_info)
segment_files.append(segment_filename)
config_dash.LOG.info(
"Downloaded %s. Size = %s in %s seconds" %
(segment_url, segment_size, str(segment_download_time)))
if previous_bitrate:
if previous_bitrate < current_bitrate:
config_dash.JSON_HANDLE['playback_info']['up_shifts'] += 1
elif previous_bitrate > current_bitrate:
config_dash.JSON_HANDLE['playback_info']['down_shifts'] += 1
previous_bitrate = current_bitrate
# waiting for the player to finish playing
while dash_player.playback_state not in dash_buffer.EXIT_STATES:
time.sleep(1)
write_json()
if not download:
clean_files(file_identifier)
def start_playback_smart(dp_object,
domain,
playback_type=None,
download=False,
video_segment_duration=None,
retrans=False):
""" Module that downloads the MPD-FIle and download
all the representations of the Module to download
the MPEG-DASH media.
Example: start_playback_smart(dp_object, domain, "SMART", DOWNLOAD, video_segment_duration)
:param dp_object: The DASH-playback object
:param domain: The domain name of the server (The segment URLS are domain + relative_address)
:param playback_type: The type of playback
1. 'BASIC' - The basic adapataion scheme
2. 'SARA' - Segment Aware Rate Adaptation
3. 'NETFLIX' - Buffer based adaptation used by Netflix
4. 'VLC' - VLC adaptation scheme
:param download: Set to True if the segments are to be stored locally (Boolean). Default False
:param video_segment_duration: Playback duratoin of each segment
:return:
"""
# Initialize the DASH buffer
video_segment_duration = 2
dash_player = dash_buffer.DashPlayer(dp_object.playback_duration,
video_segment_duration)
start_dload_time = timeit.default_timer()
dash_player.start()
# A folder to save the segments in
file_identifier = id_generator()
config_dash.LOG.info("The segments are stored in %s" % file_identifier)
dp_list = defaultdict(defaultdict)
# Creating a Dictionary of all that has the URLs for each segment and different bitrates
for bitrate in dp_object.video:
# Getting the URL list for each bitrate
dp_object.video[bitrate] = read_mpd.get_url_list(
dp_object.video[bitrate], video_segment_duration,
dp_object.playback_duration, bitrate)
if "$Bandwidth$" in dp_object.video[bitrate].initialization:
dp_object.video[bitrate].initialization = dp_object.video[
bitrate].initialization.replace("$Bandwidth$", str(bitrate))
media_urls = [dp_object.video[bitrate].initialization
] + dp_object.video[bitrate].url_list
for segment_count, segment_url in enumerate(
media_urls, dp_object.video[bitrate].start):
# segment_duration = dp_object.video[bitrate].segment_duration
dp_list[segment_count][bitrate] = segment_url
bitrates = sorted(dp_object.video.keys())
average_dwn_time = 0
segment_files = []
# For basic adaptation
global segment_w_chunks
init_dl_start_time = timeit.default_timer()
segment_w_chunks = []
previous_segment_times = []
recent_download_sizes = []
bitrate_history = []
#segment_dl_rates = []
weighted_mean_object = None
current_bitrate = bitrates[0]
previous_bitrate = None
total_downloaded = 0
bitrate_holder = 0
dl_rate_history = []
# Delay in terms of the number of segments
delay = 0
segment_duration = 0
segment_size = segment_download_time = None
# Netflix Variables
average_segment_sizes = netflix_rate_map = None
netflix_state = "INITIAL"
RETRANSMISSION_SWITCH = False
retransmission_delay = 0
retransmission_delay_switch = False
# Start playback of all the segments
#for segment_number, segment in enumerate(dp_list, dp_object.video[current_bitrate].start):
#for segment_number in dp_list:s
segment_number = 1
original_segment_number = 1
while segment_number < len(dp_list):
if retransmission_delay_switch == True:
#segment_number = original_segment_number
retransmission_delay_switch = False
segment = segment_number
#print len(dp_list)
#print "dp_list"
#print segment
#print segment_number
#print "++++++++++++"
config_dash.LOG.info(" {}: Processing the segment {}".format(
playback_type.upper(), segment_number))
write_json()
if not previous_bitrate:
previous_bitrate = current_bitrate
if SEGMENT_LIMIT:
if not dash_player.segment_limit:
dash_player.segment_limit = int(SEGMENT_LIMIT)
if segment_number > int(SEGMENT_LIMIT):
config_dash.LOG.info("Segment limit reached")
break
if segment_number == dp_object.video[bitrate].start:
current_bitrate = bitrates[0]
else:
if playback_type.upper() == "BASIC":
current_bitrate, average_dwn_time = basic_dash2.basic_dash2(
segment_number, bitrates, average_dwn_time,
recent_download_sizes, previous_segment_times,
current_bitrate)
# if dash_player.buffer.qsize() > config_dash.BASIC_THRESHOLD:
if dash_player.buffer.__len__(
) > config_dash.BASIC_THRESHOLD: #MZ
# delay = dash_player.buffer.qsize() - config_dash.BASIC_THRESHOLD
delay = dash_player.buffer.__len__(
) - config_dash.BASIC_THRESHOLD #MZ
config_dash.LOG.info(
"Basic-DASH: Selected {} for the segment {}".format(
current_bitrate, segment_number + 1))
elif playback_type.upper() == "SMART":
if not weighted_mean_object:
weighted_mean_object = WeightedMean(
config_dash.SARA_SAMPLE_COUNT)
config_dash.LOG.debug(
"Initializing the weighted Mean object")
# Checking the segment number is in acceptable range
segment_download_rate = segment_size / segment_download_time
if segment_number < len(
dp_list) - 1 + dp_object.video[bitrate].start:
try:
current_bitrate, delay = weighted_dash.weighted_dash(
bitrates, dash_player,
weighted_mean_object.weighted_mean_rate,
current_bitrate, segment_number, segment_size,
segment_download_time,
get_segment_sizes(dp_object, segment_number + 1))
except IndexError as e:
config_dash.LOG.error(e)
#with open('sara-dash-chosen-rate.txt', 'a') as sara:
#sara.write(str(current_bitrate) + '\t' + str(segment_download_rate) + '\n')
if not os.path.exists(download_log_file):
header_row = "EpochTime, CurrentBufferSize, Bitrate, DownloadRate".split(
",")
stats = ((timeit.default_timer() - start_dload_time),
str(dash_player.buffer.__len__()),
current_bitrate, segment_download_rate)
else:
header_row = None
stats = ((timeit.default_timer() - start_dload_time),
str(dash_player.buffer.__len__()),
current_bitrate, segment_download_rate)
str_stats = [str(i) for i in stats]
with open(download_log_file, "a") as log_file_handle:
result_writer = csv.writer(log_file_handle, delimiter=",")
if header_row:
result_writer.writerow(header_row)
result_writer.writerow(str_stats)
elif playback_type.upper() == "NETFLIX":
config_dash.LOG.info("Playback is NETFLIX")
# Calculate the average segment sizes for each bitrate
if not average_segment_sizes:
average_segment_sizes = get_average_segment_sizes(
dp_object)
if segment_number < len(
dp_list) - 1 + dp_object.video[bitrate].start:
try:
if segment_size and segment_download_time:
segment_download_rate = segment_size / segment_download_time
else:
segment_download_rate = 0
current_bitrate, netflix_rate_map, netflix_state = netflix_dash.netflix_dash(
bitrates, dash_player, segment_download_rate,
current_bitrate, average_segment_sizes,
netflix_rate_map, netflix_state)
config_dash.LOG.info(
"NETFLIX: Next bitrate = {}".format(
current_bitrate))
except IndexError as e:
config_dash.LOG.error(e)
else:
config_dash.LOG.critical(
"Completed segment playback for Netflix")
break
if not os.path.exists(download_log_file):
header_row = "EpochTime, CurrentBufferSize, Bitrate, DownloadRate".split(
",")
stats = (timeit.default_timer() - start_dload_time,
str(dash_player.buffer.__len__()),
current_bitrate, segment_download_rate)
else:
header_row = None
stats = (timeit.default_timer() - start_dload_time,
str(dash_player.buffer.__len__()),
current_bitrate, segment_download_rate)
str_stats = [str(i) for i in stats]
with open(download_log_file, "ab") as log_file_handle:
result_writer = csv.writer(log_file_handle, delimiter=",")
if header_row:
result_writer.writerow(header_row)
result_writer.writerow(str_stats)
# If the buffer is full wait till it gets empty
# if dash_player.buffer.qsize() >= config_dash.NETFLIX_BUFFER_SIZE:
if dash_player.buffer.__len__(
) >= config_dash.NETFLIX_BUFFER_SIZE: #MZ
# delay = (dash_player.buffer.qsize() - config_dash.NETFLIX_BUFFER_SIZE + 1) * segment_duration
delay = (dash_player.buffer.__len__() -
config_dash.NETFLIX_BUFFER_SIZE +
1) * segment_duration #MZ
config_dash.LOG.info(
"NETFLIX: delay = {} seconds".format(delay))
elif playback_type.upper() == "VLC":
config_dash.LOG.info(
"Unknown playback type:{}. Continuing with basic playback".
format(playback_type))
config_dash.LOG.info("VLC: Current Bitrate %d" %
current_bitrate)
# current_bitrate = basic_dash.basic_dash(segment_number, bitrates, segment_download_time, current_bitrate, dash_player.buffer.qsize(), segment_size)
current_bitrate = basic_dash.basic_dash(
segment_number, bitrates,
segment_download_time, current_bitrate,
dash_player.buffer.__len__(), segment_size) #MZ
with open('vlc-dash-chosen-rate.txt', 'a') as vlc:
vlc.write(str(current_bitrate) + '\n')
# if dash_player.buffer.qsize() >= (config_dash.NETFLIX_BUFFER_SIZE):
if dash_player.buffer.__len__() >= (
config_dash.NETFLIX_BUFFER_SIZE): #MZ
delay = 1
else:
delay = 0
if segment_number < len(
dp_list) - 1 + dp_object.video[bitrate].start:
try:
if segment_size and segment_download_time:
segment_download_rate = segment_size / segment_download_time
else:
segment_download_rate = 0
except IndexError as e:
config_dash.LOG.error(e)
if not os.path.exists(download_log_file):
header_row = "EpochTime, CurrentBufferSize, Bitrate, DownloadRate".split(
",")
stats = (timeit.default_timer() - start_dload_time,
str(dash_player.buffer.__len__()),
current_bitrate, segment_download_rate)
else:
header_row = None
stats = (timeit.default_timer() - start_dload_time,
str(dash_player.buffer.__len__()),
current_bitrate, segment_download_rate)
str_stats = [str(i) for i in stats]
with open(download_log_file, "ab") as log_file_handle:
result_writer = csv.writer(log_file_handle, delimiter=",")
if header_row:
result_writer.writerow(header_row)
result_writer.writerow(str_stats)
elif playback_type.upper() == "EMPIRICAL":
buffer_upper = config_dash.NETFLIX_BUFFER_SIZE * BUFFER_THRESHOLD_UPPER
buffer_lower = config_dash.NETFLIX_BUFFER_SIZE * BUFFER_THRESHOLD_LOWER
#segment_sizes_test = get_segment_sizes(dp_object,segment_number)
#print "================"
#print segment_sizes_test
#print segment_number
#print "================"
if segment_size == 0:
curr_rate = 0
else:
curr_rate = (segment_size * 8) / segment_download_time
#segment_dl_rates.append(curr_rate)
average_segment_sizes = get_average_segment_sizes(dp_object)
dl_rate_history.append(curr_rate)
#print "-----------!!!!!!!!"
#print dl_rate_history
#print "!!!!!!!------------"
if len(dl_rate_history) > 10:
dl_rate_history.pop(0)
# current_bitrate = empirical_dash.empirical_dash(average_segment_sizes, segment_number, bitrates, segment_download_time, current_bitrate, dash_player.buffer.qsize(), segment_size, get_segment_sizes(dp_object,segment_number-2), video_segment_duration, dl_rate_history, bitrate_history, segment_w_chunks, DOWNLOAD_CHUNK)
emp_func_time = timeit.default_timer()
current_bitrate = empirical_dash.empirical_dash(
average_segment_sizes, segment_number, bitrates,
segment_download_time, current_bitrate,
dash_player.buffer.__len__(), segment_size,
get_segment_sizes(dp_object, segment_number - 2),
video_segment_duration, dl_rate_history, bitrate_history,
segment_w_chunks, DOWNLOAD_CHUNK) #MZ
with open("/dev/SQUAD/http1_seg_time", 'a') as seg_time:
seg_time.write("{},{}\n".format(
segment_number,
timeit.default_timer() - emp_func_time))
bitrates = [float(i) for i in bitrates]
if len(segment_w_chunks) > 10:
#segment_w_chunks = numpy.delete(segment_w_chunks, (0), axis=0)
segment_w_chunks.pop(0)
print("deleted elements!")
#print bitrates
# if dash_player.buffer.qsize() >= buffer_upper and segment_number > 10:
if segment_number > 10:
if current_bitrate <= bitrate_history[
-1] or dash_player.buffer.__len__() < buffer_lower:
print(
"current_bitrate <= bitrate_history[-1] or dash_player.buffer.__len__() < buffer_lower"
)
if dash_player.buffer.__len__() >= buffer_upper: #MZ
with open('empirical-buffer-holder.txt',
'a') as buh:
buh.write(
str(segment_number) + '\t' + '1' + '\n')
if bitrate_holder == 1:
#print "bitrate holder: ON"
#print "bitrate_history[-1]: " + str(bitrate_history[-1])
#print bitrate_history
current_bitrate = bitrate_history[-1]
elif len(bitrates
) > 1 and current_bitrate < bitrates[int(
bitrates.index(bitrate_history[-1]) -
2)]:
#print "current_rate! : " + str(current_bitrate)
#current_bitrate = bitrate_history[-1]
next_bitrate = int(
round(bitrate_history[-1] +
current_bitrate) / 2)
current_bitrate = min(
bitrates,
key=lambda x: abs(x - next_bitrate))
#next_q_layer = int(round((bitrates.index(bitrate_history[-1]) + bitrates.index(current_bitrate)) / 2))
#print "next_q_layer! : " + str(next_q_layer)
#current_bitrate = bitrates[next_q_layer]
#print "changed current_rate! : " + str(current_bitrate)
bitrate_holder = 1
#elif (current_bitrate > bitrates[int(bitrates.index(bitrate_history[-1]) - 2)]) and (current_bitrate < bitrates[int(bitrates.index(bitrate_history[-1]))]):
elif len(bitrates) > 1 and (
current_bitrate >= bitrates[int(
bitrates.index(bitrate_history[-1]) -
2)]) and (current_bitrate <
bitrate_history[-1]):
#print "holding bitrate!"
#print bitrate_history
current_bitrate = bitrate_history[-1]
elif bitrate_holder == 0 and current_bitrate < bitrates[
-1] and (current_bitrate == bitrates[int(
bitrates.index(bitrate_history[-1]) +
1)]):
current_bitrate = bitrate_history[-1]
elif bitrate_holder == 0:
print("go ahead!")
elif bitrate_holder == 1 and dash_player.buffer.__len__(
) >= buffer_lower:
#print "bitrate holder: ON; buffer > lower_bound"
#print bitrate_history
#print "bitrate_history[-1]: " + str(bitrate_history[-1])
current_bitrate = bitrate_history[-1]
if dash_player.buffer.__len__() < buffer_lower:
#print "buffer < lower"
#print dash_player.buffer.__len__()
#print buffer_lower
bitrate_holder = 0
if current_bitrate != bitrates[-1] and bitrate_history[
-1] < bitrates[-1] and (
current_bitrate == bitrates[int(
bitrates.index(bitrate_history[-1]) +
1)]):
current_bitrate = bitrate_history[-1]
elif current_bitrate > bitrate_history[
-1] and dash_player.buffer.__len__(
) >= buffer_upper:
#print "current_bitrate > bitrate_history[-1] and dash_player.buffer.__len__() >= buffer_lower"
#print current_bitrate
#print bitrate_history[-1]
#print buffer_lower
#print "current_bitrate > bitrate_history[-1] and dash_player.buffer.__len__() >= buffer_lower"
bitrate_holder = 0
#if (bitrates.index(current_bitrate) - bitrates.index(bitrate_history[-1])) <= 2 and (bitrates.index(current_bitrate) - bitrates.index(bitrate_history[-1])) >= 0:
# current_bitrate = bitrate_history[-1]
#current_bitrate = bitrates[bitrates.index(bitrate_history[-1])/2]
print("---------------current_bitrate: " +
str(current_bitrate))
bitrate_actual_time = timeit.default_timer(
) - init_dl_start_time
# if dash_player.buffer.qsize() >= (config_dash.NETFLIX_BUFFER_SIZE):
if segment_size and segment_download_time:
segment_download_rate = segment_size / segment_download_time
#with open('/dev/SQUAD/http2_read_seg_size_rate.txt', 'a') as rate_f:
#rate_f.write(str(segment_size)+'\t'+str(segment_download_rate)+'\n')
else:
segment_download_rate = 0
RETRANS_OFFSET = False
#original_segment_number = segment_number
if segment_number > 10 and retrans:
print('++++++++++++++++++++++++++')
print(dash_player.buffer.__len__())
print(RETRANS_THRESHOLD_UPPER *
config_dash.NETFLIX_BUFFER_SIZE)
print(RETRANSMISSION_SWITCH)
print('++++++++++++++++++++++++++')
if dash_player.buffer.__len__() >= (
RETRANS_THRESHOLD_UPPER *
config_dash.NETFLIX_BUFFER_SIZE
) or RETRANSMISSION_SWITCH == True:
with open('empirical-retrans.txt', 'a') as retrans:
retrans.write(
str(segment_number) + '\t' + '2' + '\n')
with open('empirical-debug.txt', 'a') as emp:
emp.write("!!!!!!!RETRANSMISSION!!!!!!!!" + '\n')
print("RETRANSMISSION_SWITCH = True !")
RETRANSMISSION_SWITCH = True
original_segment_number = segment_number
original_current_bitrate = current_bitrate
current_bitrate, segment_number = retransmission.retransmission(
dp_object, current_bitrate, segment_number,
dash_player.buffer, bitrates,
segment_download_rate,
config_dash.NETFLIX_BUFFER_SIZE,
video_segment_duration)
if dash_player.buffer.__len__() < (
RETRANS_THRESHOLD_LOWER *
config_dash.NETFLIX_BUFFER_SIZE):
RETRANSMISSION_SWITCH = False
#dl_rate based retransmission:
#if segment_number != original_segment_number and (curr_rate - current_bitrate >= original_current_bitrate):
if segment_number != original_segment_number:
retransmission_delay_switch = True
seg_num_offset = -(original_segment_number -
segment_number + 1)
bitrate_history.pop(seg_num_offset)
bitrate_history.insert(seg_num_offset,
current_bitrate)
RETRANS_OFFSET = True
retransmission_delay += 1
with open('empirical-debug.txt', 'a') as emp:
#for item in bitrate_history:
# emp.write("%s " % item)
emp.write('\n' + str(segment_number) + '\t' +
str(bitrate_actual_time) + '\t' +
str(current_bitrate) + '\t' +
str(dash_player.buffer.__len__()) +
'retr' + '\n')
#print "###########"
with open('empirical-dash-chosen-rate.txt', 'a') as emp:
emp.write(
str(segment_number) + '\t' + str(bitrate_actual_time) +
'\t' + str(segment_download_rate * 8) + '\t' +
str(current_bitrate) + '\t' +
str(dash_player.buffer.__len__()) + '\n')
if dash_player.buffer.__len__() >= (
config_dash.NETFLIX_BUFFER_SIZE): #MZ
delay = 1
else:
delay = 0
#print segment_number
#print "=============="
#print dp_object.video[current_bitrate]
#print "=============="
if RETRANS_OFFSET == False:
bitrate_history.append(current_bitrate)
#segment_number -= retransmission_delay
#retransmission_delay_done = True
print("-------------+++++++++++++")
print(dp_list[segment][current_bitrate])
print(urllib.parse.urljoin(domain, segment_path))
print("-------------+++++++++++++")
if not os.path.exists(download_log_file):
header_row = "EpochTime, CurrentBufferSize, Bitrate, DownloadRate, SegmentNumber,SegmentSize,SegmentDownloadTime".split(
",")
stats = (timeit.default_timer() - start_dload_time,
str(dash_player.buffer.__len__()),
current_bitrate, segment_download_rate,
segment_number, segment_size,
segment_download_time)
else:
header_row = None
stats = (timeit.default_timer() - start_dload_time,
str(dash_player.buffer.__len__()),
current_bitrate, segment_download_rate,
segment_number, segment_size,
segment_download_time)
str_stats = [str(i) for i in stats]
with open(download_log_file, "a") as log_file_handle:
result_writer = csv.writer(log_file_handle, delimiter=",")
if header_row:
result_writer.writerow(header_row)
result_writer.writerow(str_stats)
segment_path = dp_list[segment][current_bitrate]
segment_url = urllib.parse.urljoin(domain, segment_path)
#print "+++++++++++++"
#print segment_path
#print segment_url
#print dp_list[segment]
#print "+++++++++++++"
config_dash.LOG.info("{}: Segment URL = {}".format(
playback_type.upper(), segment_url))
if delay:
delay_start = time.time()
config_dash.LOG.info("SLEEPING for {}seconds ".format(
delay * segment_duration))
while time.time() - delay_start < (delay * segment_duration):
time.sleep(1)
delay = 0
config_dash.LOG.debug("SLEPT for {}seconds ".format(time.time() -
delay_start))
start_time = timeit.default_timer()
try:
config_dash.LOG.info("{}: Started downloading segment {}".format(
playback_type.upper(), segment_url))
segment_size, segment_filename, segment_w_chunks = download_segment(
segment_url, file_identifier)
config_dash.LOG.info("{}: Finished Downloaded segment {}".format(
playback_type.upper(), segment_url))
except IOError as e:
config_dash.LOG.error("Unable to save segment: {0}".format(
e.filename))
return None
segment_download_time = timeit.default_timer() - start_time
segment_download_rate = segment_size / segment_download_time
#with open('/dev/SQUAD/tst_hyper_http1_read_mod_chunk_seg_time_rate.txt', 'a') as rate_f:
# rate_f.write(str(segment_size)+'\t'+str(segment_download_time)+'\t'+str(segment_download_rate*8)+'\n')
previous_segment_times.append(segment_download_time)
recent_download_sizes.append(segment_size)
# Updating the JSON information
segment_name = os.path.split(segment_url)[1]
if "segment_info" not in config_dash.JSON_HANDLE:
config_dash.JSON_HANDLE["segment_info"] = list()
config_dash.JSON_HANDLE["segment_info"].append(
(segment_name, current_bitrate, segment_size,
segment_download_time))
total_downloaded += segment_size
config_dash.LOG.info(
"{} : The total downloaded = {}, segment_size = {}, segment_number = {}"
.format(playback_type.upper(), total_downloaded, segment_size,
segment_number))
if playback_type.upper() == "SMART" and weighted_mean_object:
weighted_mean_object.update_weighted_mean(segment_size,
segment_download_time)
segment_info = {
'playback_length': video_segment_duration,
'size': segment_size,
'bitrate': current_bitrate,
'data': segment_filename,
'URI': segment_url,
'segment_number': segment_number,
'segment_layer': bitrates.index(current_bitrate)
}
segment_duration = segment_info['playback_length']
dash_player.write(segment_info)
segment_files.append(segment_filename)
segment_number += 1
if retransmission_delay_switch == True:
segment_number = original_segment_number
#if segment_number > 10:
# if original_segment_number != segment_number:
# print "!!!!!!!!! not equal !!!!!!!!!!!!"
# print "segment_number " + str(segment_number)
# print "original segment number : " + str(original_segment_number)
# retransmission_delay_switch = True
# #original_segment_number += 1
config_dash.LOG.info(
"Download info: segment URL: %s. Size = %s in %s seconds" %
(segment_url, segment_size, str(segment_download_time)))
if previous_bitrate:
if previous_bitrate < current_bitrate:
config_dash.JSON_HANDLE['playback_info']['up_shifts'] += 1
elif previous_bitrate > current_bitrate:
config_dash.JSON_HANDLE['playback_info']['down_shifts'] += 1
previous_bitrate = current_bitrate
# waiting for the player to finish playing
while dash_player.playback_state not in dash_buffer.EXIT_STATES:
time.sleep(1)
write_json()
if not download:
clean_files(file_identifier)