[f4m] Implement f4m fd in terms of fragment fd

This commit is contained in:
Sergey M․ 2015-07-29 02:27:50 +06:00
parent 95d8f7ea12
commit ab81ef8fa7

View file

@ -7,8 +7,7 @@ import os
import time
import xml.etree.ElementTree as etree
from .common import FileDownloader
from .http import HttpFD
from .fragment import FragmentFD
from ..compat import (
compat_urlparse,
compat_urllib_error,
@ -16,8 +15,6 @@ from ..compat import (
from ..utils import (
struct_pack,
struct_unpack,
encodeFilename,
sanitize_open,
xpath_text,
)
@ -226,16 +223,13 @@ def _add_ns(prop):
return '{http://ns.adobe.com/f4m/1.0}%s' % prop
class HttpQuietDownloader(HttpFD):
def to_screen(self, *args, **kargs):
pass
class F4mFD(FileDownloader):
class F4mFD(FragmentFD):
"""
A downloader for f4m manifests or AdobeHDS.
"""
FD_NAME = 'f4m'
def _get_unencrypted_media(self, doc):
media = doc.findall(_add_ns('media'))
if not media:
@ -288,7 +282,7 @@ class F4mFD(FileDownloader):
def real_download(self, filename, info_dict):
man_url = info_dict['url']
requested_bitrate = info_dict.get('tbr')
self.to_screen('[download] Downloading f4m manifest')
self.to_screen('[%s] Downloading f4m manifest' % self.FD_NAME)
manifest = self.ydl.urlopen(man_url).read()
doc = etree.fromstring(manifest)
@ -320,67 +314,20 @@ class F4mFD(FileDownloader):
# For some akamai manifests we'll need to add a query to the fragment url
akamai_pv = xpath_text(doc, _add_ns('pv-2.0'))
self.report_destination(filename)
http_dl = HttpQuietDownloader(
self.ydl,
{
'continuedl': True,
'quiet': True,
'noprogress': True,
'ratelimit': self.params.get('ratelimit', None),
'test': self.params.get('test', False),
}
)
tmpfilename = self.temp_name(filename)
(dest_stream, tmpfilename) = sanitize_open(tmpfilename, 'wb')
ctx = {
'filename': filename,
'total_frags': total_frags,
}
self._prepare_frag_download(ctx)
dest_stream = ctx['dest_stream']
write_flv_header(dest_stream)
if not live:
write_metadata_tag(dest_stream, metadata)
# This dict stores the download progress, it's updated by the progress
# hook
state = {
'status': 'downloading',
'downloaded_bytes': 0,
'frag_index': 0,
'frag_count': total_frags,
'filename': filename,
'tmpfilename': tmpfilename,
}
start = time.time()
def frag_progress_hook(s):
if s['status'] not in ('downloading', 'finished'):
return
frag_total_bytes = s.get('total_bytes', 0)
if s['status'] == 'finished':
state['downloaded_bytes'] += frag_total_bytes
state['frag_index'] += 1
estimated_size = (
(state['downloaded_bytes'] + frag_total_bytes) /
(state['frag_index'] + 1) * total_frags)
time_now = time.time()
state['total_bytes_estimate'] = estimated_size
state['elapsed'] = time_now - start
if s['status'] == 'finished':
progress = self.calc_percent(state['frag_index'], total_frags)
else:
frag_downloaded_bytes = s['downloaded_bytes']
frag_progress = self.calc_percent(frag_downloaded_bytes,
frag_total_bytes)
progress = self.calc_percent(state['frag_index'], total_frags)
progress += frag_progress / float(total_frags)
state['eta'] = self.calc_eta(
start, time_now, estimated_size, state['downloaded_bytes'] + frag_downloaded_bytes)
state['speed'] = s.get('speed')
self._hook_progress(state)
http_dl.add_progress_hook(frag_progress_hook)
self._start_frag_download(ctx)
frags_filenames = []
while fragments_list:
@ -391,9 +338,9 @@ class F4mFD(FileDownloader):
url += '?' + akamai_pv.strip(';')
if info_dict.get('extra_param_to_segment_url'):
url += info_dict.get('extra_param_to_segment_url')
frag_filename = '%s-%s' % (tmpfilename, name)
frag_filename = '%s-%s' % (ctx['tmpfilename'], name)
try:
success = http_dl.download(frag_filename, {'url': url})
success = ctx['dl'].download(frag_filename, {'url': url})
if not success:
return False
with open(frag_filename, 'rb') as down:
@ -425,20 +372,9 @@ class F4mFD(FileDownloader):
msg = 'Missed %d fragments' % (fragments_list[0][1] - (frag_i + 1))
self.report_warning(msg)
dest_stream.close()
self._finish_frag_download(ctx)
elapsed = time.time() - start
self.try_rename(tmpfilename, filename)
for frag_file in frags_filenames:
os.remove(frag_file)
fsize = os.path.getsize(encodeFilename(filename))
self._hook_progress({
'downloaded_bytes': fsize,
'total_bytes': fsize,
'filename': filename,
'status': 'finished',
'elapsed': elapsed,
})
return True