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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* 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 MODULES_RTP_RTCP_SOURCE_ULPFEC_RECEIVER_H_
#define MODULES_RTP_RTCP_SOURCE_ULPFEC_RECEIVER_H_
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <vector>
#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 "rtc_base/system/no_unique_address.h"
#include "rtc_base/thread_annotations.h"
#include "system_wrappers/include/clock.h"
namespace webrtc {
struct FecPacketCounter {
FecPacketCounter() = default;
size_t num_packets = 0; // Number of received packets.
size_t num_bytes = 0;
size_t num_fec_packets = 0; // Number of received FEC packets.
size_t num_recovered_packets =
0; // Number of recovered media packets using FEC.
// Time when first packet is received.
Timestamp first_packet_time = Timestamp::MinusInfinity();
};
class UlpfecReceiver {
public:
UlpfecReceiver(uint32_t ssrc,
int ulpfec_payload_type,
RecoveredPacketReceiver* callback,
Clock* clock);
~UlpfecReceiver();
int ulpfec_payload_type() const { return ulpfec_payload_type_; }
bool AddReceivedRedPacket(const RtpPacketReceived& rtp_packet);
void ProcessReceivedFec();
FecPacketCounter GetPacketCounter() const;
private:
const uint32_t ssrc_;
const int ulpfec_payload_type_;
Clock* const clock_;
RTC_NO_UNIQUE_ADDRESS SequenceChecker sequence_checker_;
RecoveredPacketReceiver* const recovered_packet_callback_;
const std::unique_ptr<ForwardErrorCorrection> fec_;
// TODO(nisse): The AddReceivedRedPacket method adds one or two packets to
// this list at a time, after which it is emptied by ProcessReceivedFec. It
// will make things simpler to merge AddReceivedRedPacket and
// ProcessReceivedFec into a single method, and we can then delete this list.
std::vector<std::unique_ptr<ForwardErrorCorrection::ReceivedPacket>>
received_packets_ RTC_GUARDED_BY(&sequence_checker_);
ForwardErrorCorrection::RecoveredPacketList recovered_packets_
RTC_GUARDED_BY(&sequence_checker_);
FecPacketCounter packet_counter_ RTC_GUARDED_BY(&sequence_checker_);
};
} // namespace webrtc
#endif // MODULES_RTP_RTCP_SOURCE_ULPFEC_RECEIVER_H_
|
