blob: 166b6a7f0c79ace1156d86347ba32d3ff127e3dc (
plain)
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
|
/*
* Copyright (c) 2020 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_VIDEO_CODING_RTP_SEQ_NUM_ONLY_REF_FINDER_H_
#define MODULES_VIDEO_CODING_RTP_SEQ_NUM_ONLY_REF_FINDER_H_
#include <deque>
#include <map>
#include <memory>
#include <set>
#include <utility>
#include "absl/container/inlined_vector.h"
#include "modules/rtp_rtcp/source/frame_object.h"
#include "modules/video_coding/rtp_frame_reference_finder.h"
#include "rtc_base/numerics/sequence_number_unwrapper.h"
namespace webrtc {
class RtpSeqNumOnlyRefFinder {
public:
RtpSeqNumOnlyRefFinder() = default;
RtpFrameReferenceFinder::ReturnVector ManageFrame(
std::unique_ptr<RtpFrameObject> frame);
RtpFrameReferenceFinder::ReturnVector PaddingReceived(uint16_t seq_num);
void ClearTo(uint16_t seq_num);
private:
static constexpr int kMaxStashedFrames = 100;
static constexpr int kMaxPaddingAge = 100;
enum FrameDecision { kStash, kHandOff, kDrop };
FrameDecision ManageFrameInternal(RtpFrameObject* frame);
void RetryStashedFrames(RtpFrameReferenceFinder::ReturnVector& res);
void UpdateLastPictureIdWithPadding(uint16_t seq_num);
// For every group of pictures, hold two sequence numbers. The first being
// the sequence number of the last packet of the last completed frame, and
// the second being the sequence number of the last packet of the last
// completed frame advanced by any potential continuous packets of padding.
std::map<uint16_t,
std::pair<uint16_t, uint16_t>,
DescendingSeqNumComp<uint16_t>>
last_seq_num_gop_;
// Padding packets that have been received but that are not yet continuous
// with any group of pictures.
std::set<uint16_t, DescendingSeqNumComp<uint16_t>> stashed_padding_;
// Frames that have been fully received but didn't have all the information
// needed to determine their references.
std::deque<std::unique_ptr<RtpFrameObject>> stashed_frames_;
// Unwrapper used to unwrap generic RTP streams. In a generic stream we derive
// a picture id from the packet sequence number.
SeqNumUnwrapper<uint16_t> rtp_seq_num_unwrapper_;
};
} // namespace webrtc
#endif // MODULES_VIDEO_CODING_RTP_SEQ_NUM_ONLY_REF_FINDER_H_
|
