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52 lines
1.7 KiB
52 lines
1.7 KiB
7 months ago
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// Copyright 2019 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CAST_STREAMING_SENDER_REPORT_PARSER_H_
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#define CAST_STREAMING_SENDER_REPORT_PARSER_H_
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#include "absl/types/optional.h"
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#include "absl/types/span.h"
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#include "cast/streaming/rtcp_common.h"
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#include "cast/streaming/rtcp_session.h"
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#include "cast/streaming/rtp_defines.h"
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#include "cast/streaming/rtp_time.h"
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namespace openscreen {
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namespace cast {
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// Parses RTCP packets from a Sender to extract Sender Reports. Ignores anything
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// else, since that is all a Receiver would be interested in.
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class SenderReportParser {
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public:
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// Returned by Parse(), to also separately expose the StatusReportId. The
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// report ID isn't included in the common RtcpSenderReport struct because it's
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// not an input to SenderReportBuilder (it is generated by the builder).
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struct SenderReportWithId : public RtcpSenderReport {
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SenderReportWithId();
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~SenderReportWithId();
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StatusReportId report_id{};
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};
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explicit SenderReportParser(RtcpSession* session);
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~SenderReportParser();
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// Parses the RTCP |packet|, and returns a parsed sender report if the packet
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// contained one. Returns nullopt if the data is corrupt or the packet did not
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// contain a sender report.
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absl::optional<SenderReportWithId> Parse(absl::Span<const uint8_t> packet);
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private:
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RtcpSession* const session_;
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// Tracks the recently-parsed RTP timestamps so that the truncated values can
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// be re-expanded into full-form.
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RtpTimeTicks last_parsed_rtp_timestamp_;
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};
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} // namespace cast
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} // namespace openscreen
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#endif // CAST_STREAMING_SENDER_REPORT_PARSER_H_
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