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95d8f7ea S |
1 | from __future__ import division, unicode_literals |
2 | ||
3 | import os | |
4 | import time | |
5 | ||
6 | from .common import FileDownloader | |
7 | from .http import HttpFD | |
8 | from ..utils import ( | |
9 | encodeFilename, | |
10 | sanitize_open, | |
11 | ) | |
12 | ||
13 | ||
14 | class HttpQuietDownloader(HttpFD): | |
15 | def to_screen(self, *args, **kargs): | |
16 | pass | |
17 | ||
18 | ||
19 | class FragmentFD(FileDownloader): | |
20 | """ | |
21 | A base file downloader class for fragmented media (e.g. f4m/m3u8 manifests). | |
22 | """ | |
23 | ||
24 | def _prepare_and_start_frag_download(self, ctx): | |
25 | self._prepare_frag_download(ctx) | |
26 | self._start_frag_download(ctx) | |
27 | ||
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( | |
32 | self.ydl, | |
33 | { | |
34 | 'continuedl': True, | |
35 | 'quiet': True, | |
36 | 'noprogress': True, | |
37 | 'ratelimit': self.params.get('ratelimit', None), | |
6828c809 | 38 | 'retries': self.params.get('retries', 0), |
95d8f7ea S |
39 | 'test': self.params.get('test', False), |
40 | } | |
41 | ) | |
42 | tmpfilename = self.temp_name(ctx['filename']) | |
43 | dest_stream, tmpfilename = sanitize_open(tmpfilename, 'wb') | |
44 | ctx.update({ | |
45 | 'dl': dl, | |
46 | 'dest_stream': dest_stream, | |
47 | 'tmpfilename': tmpfilename, | |
48 | }) | |
49 | ||
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 | |
53 | # hook | |
54 | state = { | |
55 | 'status': 'downloading', | |
56 | 'downloaded_bytes': 0, | |
57 | 'frag_index': 0, | |
58 | 'frag_count': total_frags, | |
59 | 'filename': ctx['filename'], | |
60 | 'tmpfilename': ctx['tmpfilename'], | |
b83b782d S |
61 | } |
62 | ||
63 | start = time.time() | |
64 | ctx.update({ | |
65 | 'started': start, | |
709185a2 | 66 | # Total complete fragments downloaded so far in bytes |
b83b782d | 67 | 'complete_frags_downloaded_bytes': 0, |
709185a2 S |
68 | # Amount of fragment's bytes downloaded by the time of the previous |
69 | # frag progress hook invocation | |
b83b782d S |
70 | 'prev_frag_downloaded_bytes': 0, |
71 | }) | |
95d8f7ea S |
72 | |
73 | def frag_progress_hook(s): | |
74 | if s['status'] not in ('downloading', 'finished'): | |
75 | return | |
76 | ||
3c91e416 | 77 | frag_total_bytes = s.get('total_bytes') or 0 |
95d8f7ea S |
78 | |
79 | estimated_size = ( | |
b83b782d | 80 | (ctx['complete_frags_downloaded_bytes'] + frag_total_bytes) / |
95d8f7ea S |
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 | |
85 | ||
709185a2 S |
86 | if s['status'] == 'finished': |
87 | state['frag_index'] += 1 | |
b83b782d S |
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 | |
709185a2 S |
91 | else: |
92 | frag_downloaded_bytes = s['downloaded_bytes'] | |
b83b782d | 93 | state['downloaded_bytes'] += frag_downloaded_bytes - ctx['prev_frag_downloaded_bytes'] |
95d8f7ea | 94 | state['eta'] = self.calc_eta( |
9cb1a06b | 95 | start, time_now, estimated_size, |
709185a2 | 96 | state['downloaded_bytes']) |
95d8f7ea | 97 | state['speed'] = s.get('speed') |
b83b782d | 98 | ctx['prev_frag_downloaded_bytes'] = frag_downloaded_bytes |
95d8f7ea S |
99 | self._hook_progress(state) |
100 | ||
101 | ctx['dl'].add_progress_hook(frag_progress_hook) | |
102 | ||
103 | return start | |
104 | ||
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'])) | |
110 | ||
111 | self._hook_progress({ | |
112 | 'downloaded_bytes': fsize, | |
113 | 'total_bytes': fsize, | |
114 | 'filename': ctx['filename'], | |
115 | 'status': 'finished', | |
116 | 'elapsed': elapsed, | |
117 | }) |