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/*
* Copyright (c) 2012 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 WEBRTC_MODULES_RTP_RTCP_SOURCE_PRODUCER_FEC_H_
#define WEBRTC_MODULES_RTP_RTCP_SOURCE_PRODUCER_FEC_H_
#include <list>
#include <vector>
#include "webrtc/modules/rtp_rtcp/source/forward_error_correction.h"
namespace webrtc {
struct RtpPacket;
class RedPacket {
public:
explicit RedPacket(size_t length);
~RedPacket();
void CreateHeader(const uint8_t* rtp_header, size_t header_length,
int red_pl_type, int pl_type);
void SetSeqNum(int seq_num);
void AssignPayload(const uint8_t* payload, size_t length);
void ClearMarkerBit();
uint8_t* data() const;
size_t length() const;
private:
uint8_t* data_;
size_t length_;
size_t header_length_;
};
class ProducerFec {
public:
explicit ProducerFec(ForwardErrorCorrection* fec);
~ProducerFec();
void SetFecParameters(const FecProtectionParams* params,
int max_fec_frames);
// The caller is expected to delete the memory when done.
RedPacket* BuildRedPacket(const uint8_t* data_buffer,
size_t payload_length,
size_t rtp_header_length,
int red_pl_type);
int AddRtpPacketAndGenerateFec(const uint8_t* data_buffer,
size_t payload_length,
size_t rtp_header_length);
bool ExcessOverheadBelowMax();
bool MinimumMediaPacketsReached();
bool FecAvailable() const;
size_t NumAvailableFecPackets() const;
// GetFecPackets allocates memory and creates FEC packets, but the caller is
// assumed to delete the memory when done with the packets.
std::vector<RedPacket*> GetFecPackets(int red_pl_type,
int fec_pl_type,
uint16_t first_seq_num,
size_t rtp_header_length);
private:
void DeletePackets();
int Overhead() const;
ForwardErrorCorrection* fec_;
std::list<ForwardErrorCorrection::Packet*> media_packets_fec_;
std::list<ForwardErrorCorrection::Packet*> fec_packets_;
int num_frames_;
int num_first_partition_;
int minimum_media_packets_fec_;
FecProtectionParams params_;
FecProtectionParams new_params_;
};
} // namespace webrtc
#endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_PRODUCER_FEC_H_
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