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-rw-r--r--youtube_dl/downloader/fragment.py110
1 files changed, 110 insertions, 0 deletions
diff --git a/youtube_dl/downloader/fragment.py b/youtube_dl/downloader/fragment.py
new file mode 100644
index 000000000..5f9d6796d
--- /dev/null
+++ b/youtube_dl/downloader/fragment.py
@@ -0,0 +1,110 @@
+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):
+ self.to_screen('[%s] Total fragments: %d' % (self.FD_NAME, ctx['total_frags']))
+ self.report_destination(ctx['filename'])
+ 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(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['started'] = start
+
+ 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)
+
+ 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,
+ })