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svtplay-dl/lib/svtplay/hds.py
2013-02-12 19:22:22 +01:00

256 lines
6.7 KiB
Python

import sys
import base64
import re
import struct
import logging
import binascii
import time
from datetime import timedelta
import xml.etree.ElementTree as ET
from lib.svtplay.output import progressbar, progress_stream
from lib.svtplay.utils import get_http_data, select_quality
log = logging.getLogger('svtplay_dl')
def download_hds(options, url, swf=None):
data = get_http_data(url)
streams = {}
bootstrap = {}
xml = ET.XML(data)
prefix = xml.find("{http://ns.adobe.com/f4m/1.0}id").text
if sys.version_info < (2, 7):
bootstrapIter = xml.getiterator("{http://ns.adobe.com/f4m/1.0}bootstrapInfo")
mediaIter = xml.getiterator("{http://ns.adobe.com/f4m/1.0}media")
else:
bootstrapIter = xml.iter("{http://ns.adobe.com/f4m/1.0}bootstrapInfo")
mediaIter = xml.iter("{http://ns.adobe.com/f4m/1.0}media")
for i in bootstrapIter:
bootstrap[i.attrib["id"]] = i.text
for i in mediaIter:
streams[int(i.attrib["bitrate"])] = {"url": i.attrib["url"], "bootstrapInfoId": i.attrib["bootstrapInfoId"], "metadata": i.find("{http://ns.adobe.com/f4m/1.0}metadata").text}
test = select_quality(options, streams)
bootstrap = base64.b64decode(bootstrap[test["bootstrapInfoId"]])
box = readboxtype(bootstrap, 0)
if box[2] == "abst":
antal = readbox(bootstrap, box[0])
baseurl = url[0:url.rfind("/")]
i = 1
if options.output != "-":
extension = re.search("(\.[a-z0-9]+)$", options.output)
if not extension:
options.output = "%s.flv" % options.output
log.info("Outfile: %s", options.output)
file_d = open(options.output, "wb")
else:
file_d = sys.stdout
file_d.write(binascii.a2b_hex(b"464c56010500000009000000001200010c00000000000000"))
file_d.write(base64.b64decode(test["metadata"]))
file_d.write(binascii.a2b_hex(b"00000000"))
total = antal[1]["total"]
start = time.time()
estimated = ""
while i <= total:
url = "%s/%sSeg1-Frag%s" % (baseurl, test["url"], i)
if options.output != "-":
progressbar(total, i, estimated)
data = get_http_data(url)
number = decode_f4f(i, data)
file_d.write(data[number:])
now = time.time()
dt = now - start
et = dt / (i + 1) * total
rt = et - dt
td = timedelta(seconds = int(rt))
estimated = "Estimated Remaining: " + str(td)
i += 1
if options.output != "-":
file_d.close()
progress_stream.write('\n')
def readbyte(data, pos):
return struct.unpack("B", data[pos])[0]
def read16(data, pos):
endpos = pos + 2
return struct.unpack(">H", data[pos:endpos])[0]
def read24(data, pos):
end = pos + 3
return struct.unpack(">L", "\x00" + data[pos:end])[0]
def read32(data, pos):
end = pos + 4
return struct.unpack(">i", data[pos:end])[0]
def read64(data, pos):
end = pos + 8
return struct.unpack(">Q", data[pos:end])[0]
def readstring(data, pos):
length = 0
while (data[pos + length] != "\x00"):
length += 1
endpos = pos + length
string = data[pos:endpos]
pos += length + 1
return pos, string
def readboxtype(data, pos):
boxsize = read32(data, pos)
tpos = pos + 4
endpos = tpos + 4
boxtype = data[tpos:endpos]
if boxsize > 1:
boxsize -= 8
pos += 8
return pos, boxsize, boxtype
def readbox(data, pos):
version = readbyte(data, pos)
pos += 1
flags = read24(data, pos)
pos += 3
bootstrapversion = read32(data, pos)
pos += 4
byte = readbyte(data, pos)
pos += 1
profile = (byte & 0xC0) >> 6
live = (byte & 0x20) >> 5
update = (byte & 0x10) >> 4
timescale = read32(data, pos)
pos += 4
currentmediatime = read64(data, pos)
pos += 8
smptetimecodeoffset = read64(data, pos)
pos += 8
temp = readstring(data, pos)
movieidentifier = temp[1]
pos = temp[0]
serverentrycount = readbyte(data, pos)
pos += 1
serverentrytable = []
i = 0
while i < serverentrycount:
temp = readstring(data, pos)
serverentrytable.append(temp[1])
pos = temp[0]
i += 1
qualityentrycount = readbyte(data, pos)
pos += 1
qualityentrytable = []
i = 0
while i < qualityentrycount:
temp = readstring(data, pos)
qualityentrytable.append(temp[1])
pos = temp[0]
i += 1
tmp = readstring(data, pos)
drm = tmp[1]
pos = tmp[0]
tmp = readstring(data, pos)
metadata = tmp[1]
pos = tmp[0]
segmentruntable = readbyte(data, pos)
pos += 1
if segmentruntable > 0:
tmp = readboxtype(data, pos)
boxtype = tmp[2]
boxsize = tmp[1]
pos = tmp[0]
if boxtype == "asrt":
antal = readasrtbox(data, pos)
pos += boxsize
fragRunTableCount = readbyte(data, pos)
pos += 1
i = 0
while i < fragRunTableCount:
tmp = readboxtype(data, pos)
boxtype = tmp[2]
boxsize = tmp[1]
pos = tmp[0]
if boxtype == "afrt":
readafrtbox(data, pos)
pos += boxsize
i += 1
return antal
def readafrtbox(data, pos):
version = readbyte(data, pos)
pos += 1
flags = read24(data, pos)
pos += 3
timescale = read32(data, pos)
pos += 4
qualityentry = readbyte(data, pos)
pos += 1
i = 0
while i < qualityentry:
temp = readstring(data, pos)
qualitysegmulti = temp[1]
pos = temp[0]
i += 1
fragrunentrycount = read32(data, pos)
pos += 4
i = 0
while i < fragrunentrycount:
firstfragment = read32(data, pos)
pos += 4
timestamp = read64(data, pos)
pos += 8
duration = read32(data, pos)
pos += 4
i += 1
def readasrtbox(data, pos):
version = readbyte(data, pos)
pos += 1
flags = read24(data, pos)
pos += 3
qualityentrycount = readbyte(data, pos)
pos += 1
qualitysegmentmodifers = []
i = 0
while i < qualityentrycount:
temp = readstring(data, pos)
qualitysegmentmodifers.append(temp[1])
pos = temp[0]
i += 1
seqCount = read32(data, pos)
pos += 4
ret = {}
i = 0
while i < seqCount:
firstseg = read32(data, pos)
pos += 4
fragPerSeg = read32(data, pos)
pos += 4
tmp = i + 1
ret[tmp] = {"first": firstseg, "total": fragPerSeg}
i += 1
return ret
def decode_f4f(fragID, fragData):
start = fragData.find("mdat") + 4
if (fragID > 1):
for dummy in range(2):
tagLen, = struct.unpack_from(">L", fragData, start)
tagLen &= 0x00ffffff
start += tagLen + 11 + 4
return start