123 lines
4.1 KiB
Python
123 lines
4.1 KiB
Python
from __future__ import division, unicode_literals
|
|
|
|
import os
|
|
import time
|
|
|
|
from .common import FileDownloader
|
|
from .http import HttpFD
|
|
from ..utils import (
|
|
encodeFilename,
|
|
sanitize_open,
|
|
)
|
|
|
|
|
|
class HttpQuietDownloader(HttpFD):
|
|
def to_screen(self, *args, **kargs):
|
|
pass
|
|
|
|
|
|
class FragmentFD(FileDownloader):
|
|
"""
|
|
A base file downloader class for fragmented media (e.g. f4m/m3u8 manifests).
|
|
"""
|
|
|
|
def _prepare_and_start_frag_download(self, ctx):
|
|
self._prepare_frag_download(ctx)
|
|
self._start_frag_download(ctx)
|
|
|
|
def _prepare_frag_download(self, ctx):
|
|
if 'live' not in ctx:
|
|
ctx['live'] = False
|
|
self.to_screen(
|
|
'[%s] Total fragments: %s'
|
|
% (self.FD_NAME, ctx['total_frags'] if not ctx['live'] else 'unknown (live)'))
|
|
self.report_destination(ctx['filename'])
|
|
dl = HttpQuietDownloader(
|
|
self.ydl,
|
|
{
|
|
'continuedl': True,
|
|
'quiet': True,
|
|
'noprogress': True,
|
|
'ratelimit': self.params.get('ratelimit'),
|
|
'retries': self.params.get('retries', 0),
|
|
'test': self.params.get('test', False),
|
|
}
|
|
)
|
|
tmpfilename = self.temp_name(ctx['filename'])
|
|
dest_stream, tmpfilename = sanitize_open(tmpfilename, 'wb')
|
|
ctx.update({
|
|
'dl': dl,
|
|
'dest_stream': dest_stream,
|
|
'tmpfilename': tmpfilename,
|
|
})
|
|
|
|
def _start_frag_download(self, ctx):
|
|
total_frags = ctx['total_frags']
|
|
# 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': ctx['filename'],
|
|
'tmpfilename': ctx['tmpfilename'],
|
|
}
|
|
|
|
start = time.time()
|
|
ctx.update({
|
|
'started': start,
|
|
# Total complete fragments downloaded so far in bytes
|
|
'complete_frags_downloaded_bytes': 0,
|
|
# Amount of fragment's bytes downloaded by the time of the previous
|
|
# frag progress hook invocation
|
|
'prev_frag_downloaded_bytes': 0,
|
|
})
|
|
|
|
def frag_progress_hook(s):
|
|
if s['status'] not in ('downloading', 'finished'):
|
|
return
|
|
|
|
time_now = time.time()
|
|
state['elapsed'] = time_now - start
|
|
frag_total_bytes = s.get('total_bytes') or 0
|
|
if not ctx['live']:
|
|
estimated_size = (
|
|
(ctx['complete_frags_downloaded_bytes'] + frag_total_bytes) /
|
|
(state['frag_index'] + 1) * total_frags)
|
|
state['total_bytes_estimate'] = estimated_size
|
|
|
|
if s['status'] == 'finished':
|
|
state['frag_index'] += 1
|
|
state['downloaded_bytes'] += frag_total_bytes - ctx['prev_frag_downloaded_bytes']
|
|
ctx['complete_frags_downloaded_bytes'] = state['downloaded_bytes']
|
|
ctx['prev_frag_downloaded_bytes'] = 0
|
|
else:
|
|
frag_downloaded_bytes = s['downloaded_bytes']
|
|
state['downloaded_bytes'] += frag_downloaded_bytes - ctx['prev_frag_downloaded_bytes']
|
|
if not ctx['live']:
|
|
state['eta'] = self.calc_eta(
|
|
start, time_now, estimated_size,
|
|
state['downloaded_bytes'])
|
|
state['speed'] = s.get('speed')
|
|
ctx['prev_frag_downloaded_bytes'] = frag_downloaded_bytes
|
|
self._hook_progress(state)
|
|
|
|
ctx['dl'].add_progress_hook(frag_progress_hook)
|
|
|
|
return start
|
|
|
|
def _finish_frag_download(self, ctx):
|
|
ctx['dest_stream'].close()
|
|
elapsed = time.time() - ctx['started']
|
|
self.try_rename(ctx['tmpfilename'], ctx['filename'])
|
|
fsize = os.path.getsize(encodeFilename(ctx['filename']))
|
|
|
|
self._hook_progress({
|
|
'downloaded_bytes': fsize,
|
|
'total_bytes': fsize,
|
|
'filename': ctx['filename'],
|
|
'status': 'finished',
|
|
'elapsed': elapsed,
|
|
})
|