1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CAST_STREAMING_SENDER_REPORT_PARSER_H_
#define CAST_STREAMING_SENDER_REPORT_PARSER_H_
#include "absl/types/optional.h"
#include "absl/types/span.h"
#include "cast/streaming/rtcp_common.h"
#include "cast/streaming/rtcp_session.h"
#include "cast/streaming/rtp_defines.h"
#include "cast/streaming/rtp_time.h"
namespace openscreen {
namespace cast {
// Parses RTCP packets from a Sender to extract Sender Reports. Ignores anything
// else, since that is all a Receiver would be interested in.
class SenderReportParser {
public:
// Returned by Parse(), to also separately expose the StatusReportId. The
// report ID isn't included in the common RtcpSenderReport struct because it's
// not an input to SenderReportBuilder (it is generated by the builder).
struct SenderReportWithId : public RtcpSenderReport {
SenderReportWithId();
~SenderReportWithId();
StatusReportId report_id{};
};
explicit SenderReportParser(RtcpSession* session);
~SenderReportParser();
// Parses the RTCP |packet|, and returns a parsed sender report if the packet
// contained one. Returns nullopt if the data is corrupt or the packet did not
// contain a sender report.
absl::optional<SenderReportWithId> Parse(absl::Span<const uint8_t> packet);
private:
RtcpSession* const session_;
// Tracks the recently-parsed RTP timestamps so that the truncated values can
// be re-expanded into full-form.
RtpTimeTicks last_parsed_rtp_timestamp_;
};
} // namespace cast
} // namespace openscreen
#endif // CAST_STREAMING_SENDER_REPORT_PARSER_H_
|
