87 lines
3.8 KiB
Python
87 lines
3.8 KiB
Python
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import logging
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from lbrynet.core.client.StreamProgressManager import StreamProgressManager
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from twisted.internet import defer
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class LiveStreamProgressManager(StreamProgressManager):
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def __init__(self, finished_callback, blob_manager, download_manager, delete_blob_after_finished=False,
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download_whole=True, max_before_skip_ahead=5):
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self.download_whole = download_whole
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self.max_before_skip_ahead = max_before_skip_ahead
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StreamProgressManager.__init__(self, finished_callback, blob_manager, download_manager,
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delete_blob_after_finished)
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######### IProgressManager #########
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def stream_position(self):
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blobs = self.download_manager.blobs
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if not blobs:
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return 0
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else:
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newest_known_blobnum = max(blobs.iterkeys())
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position = newest_known_blobnum
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oldest_relevant_blob_num = (max(0, newest_known_blobnum - self.max_before_skip_ahead + 1))
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for i in xrange(newest_known_blobnum, oldest_relevant_blob_num - 1, -1):
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if i in blobs and (not blobs[i].is_validated() and not i in self.provided_blob_nums):
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position = i
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return position
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def needed_blobs(self):
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blobs = self.download_manager.blobs
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stream_position = self.stream_position()
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if blobs:
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newest_known_blobnum = max(blobs.iterkeys())
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else:
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newest_known_blobnum = -1
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blobs_needed = []
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for i in xrange(stream_position, newest_known_blobnum + 1):
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if i in blobs and not blobs[i].is_validated() and not i in self.provided_blob_nums:
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blobs_needed.append(blobs[i])
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return blobs_needed
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######### internal #########
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def _output_loop(self):
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from twisted.internet import reactor
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if self.stopped is True:
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if self.outputting_d is not None:
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self.outputting_d.callback(True)
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self.outputting_d = None
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return
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blobs = self.download_manager.blobs
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logging.info("In _output_loop. last_blob_outputted: %s", str(self.last_blob_outputted))
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if blobs:
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logging.debug("Newest blob number: %s", str(max(blobs.iterkeys())))
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if self.outputting_d is None:
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self.outputting_d = defer.Deferred()
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current_blob_num = self.last_blob_outputted + 1
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def finished_outputting_blob():
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self.last_blob_outputted += 1
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final_blob_num = self.download_manager.final_blob_num()
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if final_blob_num is not None and final_blob_num == self.last_blob_outputted:
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self._finished_outputting()
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self.outputting_d.callback(True)
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self.outputting_d = None
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else:
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reactor.callLater(0, self._output_loop)
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if current_blob_num in blobs and blobs[current_blob_num].is_validated():
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logging.info("Outputting blob %s", str(current_blob_num))
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self.provided_blob_nums.append(current_blob_num)
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d = self.download_manager.handle_blob(current_blob_num)
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d.addCallback(lambda _: finished_outputting_blob())
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d.addCallback(lambda _: self._finished_with_blob(current_blob_num))
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elif blobs and max(blobs.iterkeys()) > self.last_blob_outputted + self.max_before_skip_ahead - 1:
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self.last_blob_outputted += 1
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logging.info("Skipping blob number %s due to knowing about blob number %s",
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str(self.last_blob_outputted), str(max(blobs.iterkeys())))
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self._finished_with_blob(current_blob_num)
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reactor.callLater(0, self._output_loop)
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else:
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self.outputting_d.callback(True)
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self.outputting_d = None
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