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In order to eliminate the WebRTC Subtree mirror in Chromium, WebRTC is moving the content of the src/webrtc directory up to the src/ directory. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38 Reviewed-on: https://webrtc-review.googlesource.com/1560 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19845}
87 lines
2.5 KiB
Python
87 lines
2.5 KiB
Python
# Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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#
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# Use of this source code is governed by a BSD-style license
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# that can be found in the LICENSE file in the root of the source
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# tree. An additional intellectual property rights grant can be found
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# in the file PATENTS. All contributing project authors may
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# be found in the AUTHORS file in the root of the source tree.
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"""Utility functions for calculating statistics.
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"""
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from __future__ import division
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import collections
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import sys
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def CountReordered(sequence_numbers):
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"""Returns number of reordered indices.
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A reordered index is an index `i` for which sequence_numbers[i] >=
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sequence_numbers[i + 1]
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"""
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return sum(1 for (s1, s2) in zip(sequence_numbers,
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sequence_numbers[1:]) if
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s1 >= s2)
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def SsrcNormalizedSizeTable(data_points):
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"""Counts proportion of data for every SSRC.
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Args:
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data_points: list of pb_parse.DataPoint
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Returns:
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A dictionary mapping from every SSRC in the data points. The
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value of an SSRC `s` is the proportion of sizes of packets with
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SSRC `s` to the total size of all packets.
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"""
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mapping = collections.defaultdict(int)
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for point in data_points:
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mapping[point.ssrc] += point.size
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return NormalizeCounter(mapping)
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def NormalizeCounter(counter):
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"""Returns a normalized version of the dictionary `counter`.
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Does not modify `counter`.
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Returns:
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A new dictionary, in which every value in `counter`
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has been divided by the total to sum up to 1.
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"""
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total = sum(counter.values())
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return {key: counter[key] / total for key in counter}
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def Unwrap(data, mod):
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"""Returns `data` unwrapped modulo `mod`. Does not modify data.
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Adds integer multiples of mod to all elements of data except the
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first, such that all pairs of consecutive elements (a, b) satisfy
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-mod / 2 <= b - a < mod / 2.
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E.g. Unwrap([0, 1, 2, 0, 1, 2, 7, 8], 3) -> [0, 1, 2, 3,
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4, 5, 4, 5]
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"""
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lst = data[:]
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for i in range(1, len(data)):
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lst[i] = lst[i - 1] + (lst[i] - lst[i - 1] +
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mod // 2) % mod - (mod // 2)
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return lst
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def SsrcDirections(data_points):
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ssrc_is_incoming = {}
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for point in data_points:
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ssrc_is_incoming[point.ssrc] = point.incoming
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return ssrc_is_incoming
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# Python 2/3-compatible input function
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if sys.version_info[0] <= 2:
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get_input = raw_input # pylint: disable=invalid-name
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else:
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get_input = input # pylint: disable=invalid-name
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