blob: b0ca2b3354463a76e5f932758e21c580eedb6f43 [file] [log] [blame]
# Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
# Use of this source code is governed by a BSD-style license
# that can be found in the LICENSE file in the root of the source
# tree. An additional intellectual property rights grant can be found
# in the file PATENTS. All contributing project authors may
# be found in the AUTHORS file in the root of the source tree.
"""Parses protobuf RTC dumps."""
from __future__ import division
import struct
import as rtc_pb
class DataPoint(object):
"""Simple container class for RTP events."""
def __init__(self, rtp_header_str, packet_size,
"""Builds a data point by parsing an RTP header, size and arrival time.
RTP header structure is defined in RFC 3550 section 5.1.
self.size = packet_size
self.arrival_timestamp_ms = arrival_timestamp_us / 1000
header = struct.unpack_from("!HHII", rtp_header_str, 0)
(first2header_bytes, self.sequence_number, self.timestamp,
self.ssrc) = header
self.payload_type = first2header_bytes & 0b01111111
self.marker_bit = (first2header_bytes & 0b10000000) >> 7
def parse_protobuf(file_path):
"""Parses RTC event log from protobuf file.
file_path: path to protobuf file of RTC event stream
all RTP packet events from the event stream as a list of DataPoints
event_stream = rtc_pb.EventStream()
with open(file_path, "rb") as f:
return [DataPoint(event.rtp_packet.header,
for event in
if event.HasField("rtp_packet")]