blob: dc2a81eda71dea3daa8094e204b4fe2d6081ade2 (
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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/*
* Copyright (c) 2011 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.
*/
#include <Swiften/ScreenSharing/ReferencePictureSelection.h>
#include <Swiften/Base/Log.h>
#include "vpx/vpx_encoder.h"
#include "vpx/vp8cx.h"
namespace Swift {
ReferencePictureSelection::ReferencePictureSelection()
: update_golden_next_(true),
established_golden_(false),
received_ack_(false),
last_sent_ref_picture_id_(0),
established_ref_picture_id_(0),
send_refresh(false) {
}
void ReferencePictureSelection::ReceivedRPSI(int rpsi_picture_id) {
// Assume RPSI is signaled with 7 bits.
SWIFT_LOG(debug) << "ReceivedRPSI: " << rpsi_picture_id << ", " << last_sent_ref_picture_id_ << std::endl;
if ((rpsi_picture_id & 127) == (last_sent_ref_picture_id_ & 127)) {
// Remote peer has received our last reference frame, switch frame type.
received_ack_ = true;
established_golden_ = update_golden_next_;
update_golden_next_ = !update_golden_next_;
established_ref_picture_id_ = last_sent_ref_picture_id_;
SWIFT_LOG(debug) << "Ref established: " << established_ref_picture_id_ << std::endl;
}
}
void ReferencePictureSelection::ReceivedSLI() {
send_refresh = true;
}
int ReferencePictureSelection::EncodeFlags(int picture_id) {
int flags = 0;
// We can't refresh the decoder until we have established the key frame.
if (send_refresh/* && received_ack_*/) {
flags = VPX_EFLAG_FORCE_KF;
// flags |= VPX_EFLAG_FORCE_KF;
/*
flags |= VP8_EFLAG_NO_REF_LAST; // Don't reference the last frame
if (established_golden_)
flags |= VP8_EFLAG_NO_REF_ARF; // Don't reference the alt-ref frame.
else
flags |= VP8_EFLAG_NO_REF_GF; // Don't reference the golden frame
*/
/*SWIFT_LOG(debug) << "Send refresh" << std::endl;
if (established_golden_) {
flags |= VP8_EFLAG_FORCE_ARF;
flags |= VP8_EFLAG_NO_UPD_GF;
flags |= VP8_EFLAG_NO_REF_ARF;
} else {
flags |= VP8_EFLAG_FORCE_GF;
flags |= VP8_EFLAG_NO_UPD_ARF;
flags |= VP8_EFLAG_NO_REF_GF;
}*/
}
send_refresh = false;
// Don't send reference frame updates until we have an established reference.
if (received_ack_ && picture_id % 8 == 0 && false) {
flags |= VP8_EFLAG_NO_REF_LAST; // Don't reference the last frame.
SWIFT_LOG(debug) << "Send reference : " << std::boolalpha << update_golden_next_ << std::endl;
if (update_golden_next_) {
flags |= VP8_EFLAG_FORCE_GF; // Update the golden reference.
flags |= VP8_EFLAG_NO_UPD_ARF; // Don't update alt-ref.
flags |= VP8_EFLAG_NO_REF_GF; // Don't reference the golden frame.
} else {
flags |= VP8_EFLAG_FORCE_ARF; // Update the alt-ref reference.
flags |= VP8_EFLAG_NO_UPD_GF; // Don't update the golden frame.
flags |= VP8_EFLAG_NO_REF_ARF; // Don't reference the alt-ref frame.
}
} else {
// No update of golden or alt-ref. We can therefore freely reference the
// established reference frame and the last frame.
if (established_golden_)
flags |= VP8_EFLAG_NO_REF_ARF; // Don't reference the alt-ref frame.
else
flags |= VP8_EFLAG_NO_REF_GF; // Don't reference the golden frame.
flags |= VP8_EFLAG_NO_UPD_GF; // Don't update the golden frame.
flags |= VP8_EFLAG_NO_UPD_ARF; // Don't update the alt-ref frame.
}
return flags;
}
void ReferencePictureSelection::refFrameSent(int picture_id) {
last_sent_ref_picture_id_ = picture_id;
received_ack_ = false;
}
}
|
Swift