1 from __future__ import division, unicode_literals
6 from .common import FileDownloader
7 from .http import HttpFD
14 class HttpQuietDownloader(HttpFD):
15 def to_screen(self, *args, **kargs):
19 class FragmentFD(FileDownloader):
21 A base file downloader class for fragmented media (e.g. f4m/m3u8 manifests).
24 def _prepare_and_start_frag_download(self, ctx):
25 self._prepare_frag_download(ctx)
26 self._start_frag_download(ctx)
28 def _prepare_frag_download(self, ctx):
29 self.to_screen('[%s] Total fragments: %d' % (self.FD_NAME, ctx['total_frags']))
30 self.report_destination(ctx['filename'])
31 dl = HttpQuietDownloader(
37 'ratelimit': self.params.get('ratelimit', None),
38 'retries': self.params.get('retries', 0),
39 'test': self.params.get('test', False),
42 tmpfilename = self.temp_name(ctx['filename'])
43 dest_stream, tmpfilename = sanitize_open(tmpfilename, 'wb')
46 'dest_stream': dest_stream,
47 'tmpfilename': tmpfilename,
50 def _start_frag_download(self, ctx):
51 total_frags = ctx['total_frags']
52 # This dict stores the download progress, it's updated by the progress
55 'status': 'downloading',
56 'downloaded_bytes': 0,
58 'frag_count': total_frags,
59 'filename': ctx['filename'],
60 'tmpfilename': ctx['tmpfilename'],
66 # Total complete fragments downloaded so far in bytes
67 'complete_frags_downloaded_bytes': 0,
68 # Amount of fragment's bytes downloaded by the time of the previous
69 # frag progress hook invocation
70 'prev_frag_downloaded_bytes': 0,
73 def frag_progress_hook(s):
74 if s['status'] not in ('downloading', 'finished'):
77 frag_total_bytes = s.get('total_bytes') or 0
80 (ctx['complete_frags_downloaded_bytes'] + frag_total_bytes) /
81 (state['frag_index'] + 1) * total_frags)
82 time_now = time.time()
83 state['total_bytes_estimate'] = estimated_size
84 state['elapsed'] = time_now - start
86 if s['status'] == 'finished':
87 state['frag_index'] += 1
88 state['downloaded_bytes'] += frag_total_bytes - ctx['prev_frag_downloaded_bytes']
89 ctx['complete_frags_downloaded_bytes'] = state['downloaded_bytes']
90 ctx['prev_frag_downloaded_bytes'] = 0
92 frag_downloaded_bytes = s['downloaded_bytes']
93 state['downloaded_bytes'] += frag_downloaded_bytes - ctx['prev_frag_downloaded_bytes']
94 state['eta'] = self.calc_eta(
95 start, time_now, estimated_size,
96 state['downloaded_bytes'])
97 state['speed'] = s.get('speed')
98 ctx['prev_frag_downloaded_bytes'] = frag_downloaded_bytes
99 self._hook_progress(state)
101 ctx['dl'].add_progress_hook(frag_progress_hook)
105 def _finish_frag_download(self, ctx):
106 ctx['dest_stream'].close()
107 elapsed = time.time() - ctx['started']
108 self.try_rename(ctx['tmpfilename'], ctx['filename'])
109 fsize = os.path.getsize(encodeFilename(ctx['filename']))
111 self._hook_progress({
112 'downloaded_bytes': fsize,
113 'total_bytes': fsize,
114 'filename': ctx['filename'],
115 'status': 'finished',