5c29a7aad1
Preparing for a media-independent RTP receive stream interface. BUG=webrtc:7135 Review-Url: https://codereview.webrtc.org/2686273002 Cr-Commit-Position: refs/heads/master@{#16646}
81 lines
2.7 KiB
C++
81 lines
2.7 KiB
C++
/*
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* 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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*/
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#ifndef WEBRTC_MODULES_RTP_RTCP_INCLUDE_FLEXFEC_RECEIVER_H_
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#define WEBRTC_MODULES_RTP_RTCP_INCLUDE_FLEXFEC_RECEIVER_H_
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#include <memory>
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#include "webrtc/base/basictypes.h"
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#include "webrtc/base/sequenced_task_checker.h"
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#include "webrtc/call/call.h"
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#include "webrtc/modules/rtp_rtcp/include/ulpfec_receiver.h"
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#include "webrtc/modules/rtp_rtcp/source/forward_error_correction.h"
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#include "webrtc/modules/rtp_rtcp/source/rtp_packet_received.h"
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#include "webrtc/system_wrappers/include/clock.h"
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namespace webrtc {
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// Callback interface for packets recovered by FlexFEC. The implementation
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// should be able to demultiplex the recovered RTP packets based on SSRC.
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class RecoveredPacketReceiver {
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public:
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virtual bool OnRecoveredPacket(const uint8_t* packet, size_t length) = 0;
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protected:
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virtual ~RecoveredPacketReceiver() = default;
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};
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class FlexfecReceiver {
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public:
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FlexfecReceiver(uint32_t ssrc,
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uint32_t protected_media_ssrc,
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RecoveredPacketReceiver* recovered_packet_receiver);
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~FlexfecReceiver();
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// Inserts a received packet (can be either media or FlexFEC) into the
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// internal buffer, and sends the received packets to the erasure code.
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// All newly recovered packets are sent back through the callback.
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void OnRtpPacket(const RtpPacketReceived& packet);
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// Returns a counter describing the added and recovered packets.
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FecPacketCounter GetPacketCounter() const;
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// Protected to aid testing.
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protected:
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bool AddReceivedPacket(const RtpPacketReceived& packet);
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bool ProcessReceivedPackets();
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private:
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// Config.
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const uint32_t ssrc_;
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const uint32_t protected_media_ssrc_;
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// Erasure code interfacing and callback.
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std::unique_ptr<ForwardErrorCorrection> erasure_code_
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GUARDED_BY(sequence_checker_);
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ForwardErrorCorrection::ReceivedPacketList received_packets_
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GUARDED_BY(sequence_checker_);
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ForwardErrorCorrection::RecoveredPacketList recovered_packets_
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GUARDED_BY(sequence_checker_);
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RecoveredPacketReceiver* const recovered_packet_receiver_;
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// Logging and stats.
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Clock* const clock_;
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int64_t last_recovered_packet_ms_ GUARDED_BY(sequence_checker_);
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FecPacketCounter packet_counter_ GUARDED_BY(sequence_checker_);
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rtc::SequencedTaskChecker sequence_checker_;
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_RTP_RTCP_INCLUDE_FLEXFEC_RECEIVER_H_
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