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/*
* 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.
*/
#ifndef MODULES_RTP_RTCP_INCLUDE_FLEXFEC_RECEIVER_H_
#define MODULES_RTP_RTCP_INCLUDE_FLEXFEC_RECEIVER_H_
#include <stdint.h>
#include <memory>
#include "api/sequence_checker.h"
#include "api/units/timestamp.h"
#include "modules/rtp_rtcp/include/recovered_packet_receiver.h"
#include "modules/rtp_rtcp/source/forward_error_correction.h"
#include "modules/rtp_rtcp/source/rtp_packet_received.h"
#include "modules/rtp_rtcp/source/ulpfec_receiver.h"
#include "rtc_base/system/no_unique_address.h"
#include "rtc_base/thread_annotations.h"
namespace webrtc {
class Clock;
class FlexfecReceiver {
public:
FlexfecReceiver(uint32_t ssrc,
uint32_t protected_media_ssrc,
RecoveredPacketReceiver* recovered_packet_receiver);
FlexfecReceiver(Clock* clock,
uint32_t ssrc,
uint32_t protected_media_ssrc,
RecoveredPacketReceiver* recovered_packet_receiver);
~FlexfecReceiver();
// Inserts a received packet (can be either media or FlexFEC) into the
// internal buffer, and sends the received packets to the erasure code.
// All newly recovered packets are sent back through the callback.
void OnRtpPacket(const RtpPacketReceived& packet);
// Returns a counter describing the added and recovered packets.
FecPacketCounter GetPacketCounter() const;
// Protected to aid testing.
protected:
std::unique_ptr<ForwardErrorCorrection::ReceivedPacket> AddReceivedPacket(
const RtpPacketReceived& packet);
void ProcessReceivedPacket(
const ForwardErrorCorrection::ReceivedPacket& received_packet);
private:
// Config.
const uint32_t ssrc_;
const uint32_t protected_media_ssrc_;
// Erasure code interfacing and callback.
std::unique_ptr<ForwardErrorCorrection> erasure_code_
RTC_GUARDED_BY(sequence_checker_);
ForwardErrorCorrection::RecoveredPacketList recovered_packets_
RTC_GUARDED_BY(sequence_checker_);
RecoveredPacketReceiver* const recovered_packet_receiver_;
// Logging and stats.
Clock* const clock_;
Timestamp last_recovered_packet_ RTC_GUARDED_BY(sequence_checker_) =
Timestamp::MinusInfinity();
FecPacketCounter packet_counter_ RTC_GUARDED_BY(sequence_checker_);
RTC_NO_UNIQUE_ADDRESS SequenceChecker sequence_checker_;
};
} // namespace webrtc
#endif // MODULES_RTP_RTCP_INCLUDE_FLEXFEC_RECEIVER_H_
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