1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 // Note: ported from Chromium commit head: 2de6929
5
6 #include <string.h>
7
8 #include <algorithm>
9
10 #include "base/logging.h"
11 #include "base/stl_util.h"
12 #include "h264_dpb.h"
13
14 namespace media {
15
H264Picture()16 H264Picture::H264Picture()
17 : pic_order_cnt_type(0),
18 top_field_order_cnt(0),
19 bottom_field_order_cnt(0),
20 pic_order_cnt(0),
21 pic_order_cnt_msb(0),
22 pic_order_cnt_lsb(0),
23 delta_pic_order_cnt_bottom(0),
24 delta_pic_order_cnt0(0),
25 delta_pic_order_cnt1(0),
26 pic_num(0),
27 long_term_pic_num(0),
28 frame_num(0),
29 frame_num_offset(0),
30 frame_num_wrap(0),
31 long_term_frame_idx(0),
32 type(H264SliceHeader::kPSlice),
33 nal_ref_idc(0),
34 idr(false),
35 idr_pic_id(0),
36 ref(false),
37 long_term(false),
38 outputted(false),
39 mem_mgmt_5(false),
40 nonexisting(false),
41 field(FIELD_NONE),
42 long_term_reference_flag(false),
43 adaptive_ref_pic_marking_mode_flag(false),
44 dpb_position(0) {
45 memset(&ref_pic_marking, 0, sizeof(ref_pic_marking));
46 }
47
48 H264Picture::~H264Picture() = default;
49
AsV4L2H264Picture()50 V4L2H264Picture* H264Picture::AsV4L2H264Picture() {
51 return nullptr;
52 }
53
H264DPB()54 H264DPB::H264DPB() : max_num_pics_(0) {}
55 H264DPB::~H264DPB() = default;
56
Clear()57 void H264DPB::Clear() {
58 pics_.clear();
59 }
60
set_max_num_pics(size_t max_num_pics)61 void H264DPB::set_max_num_pics(size_t max_num_pics) {
62 DCHECK_LE(max_num_pics, static_cast<size_t>(kDPBMaxSize));
63 max_num_pics_ = max_num_pics;
64 if (pics_.size() > max_num_pics_)
65 pics_.resize(max_num_pics_);
66 }
67
UpdatePicPositions()68 void H264DPB::UpdatePicPositions() {
69 size_t i = 0;
70 for (auto& pic : pics_) {
71 pic->dpb_position = i;
72 ++i;
73 }
74 }
75
DeleteByPOC(int poc)76 void H264DPB::DeleteByPOC(int poc) {
77 for (H264Picture::Vector::iterator it = pics_.begin(); it != pics_.end();
78 ++it) {
79 if ((*it)->pic_order_cnt == poc) {
80 pics_.erase(it);
81 UpdatePicPositions();
82 return;
83 }
84 }
85 NOTREACHED() << "Missing POC: " << poc;
86 }
87
DeleteUnused()88 void H264DPB::DeleteUnused() {
89 for (H264Picture::Vector::iterator it = pics_.begin(); it != pics_.end();) {
90 if ((*it)->outputted && !(*it)->ref)
91 it = pics_.erase(it);
92 else
93 ++it;
94 }
95 UpdatePicPositions();
96 }
97
StorePic(const scoped_refptr<H264Picture> & pic)98 void H264DPB::StorePic(const scoped_refptr<H264Picture>& pic) {
99 DCHECK_LT(pics_.size(), max_num_pics_);
100 DVLOG(3) << "Adding PicNum: " << pic->pic_num << " ref: " << (int)pic->ref
101 << " longterm: " << (int)pic->long_term << " to DPB";
102 pic->dpb_position = pics_.size();
103 pics_.push_back(pic);
104 }
105
CountRefPics()106 int H264DPB::CountRefPics() {
107 int ret = 0;
108 for (size_t i = 0; i < pics_.size(); ++i) {
109 if (pics_[i]->ref)
110 ++ret;
111 }
112 return ret;
113 }
114
MarkAllUnusedForRef()115 void H264DPB::MarkAllUnusedForRef() {
116 for (size_t i = 0; i < pics_.size(); ++i)
117 pics_[i]->ref = false;
118 }
119
GetShortRefPicByPicNum(int pic_num)120 scoped_refptr<H264Picture> H264DPB::GetShortRefPicByPicNum(int pic_num) {
121 for (const auto& pic : pics_) {
122 if (pic->ref && !pic->long_term && pic->pic_num == pic_num)
123 return pic;
124 }
125
126 DVLOG(1) << "Missing short ref pic num: " << pic_num;
127 return nullptr;
128 }
129
GetLongRefPicByLongTermPicNum(int pic_num)130 scoped_refptr<H264Picture> H264DPB::GetLongRefPicByLongTermPicNum(int pic_num) {
131 for (const auto& pic : pics_) {
132 if (pic->ref && pic->long_term && pic->long_term_pic_num == pic_num)
133 return pic;
134 }
135
136 DVLOG(1) << "Missing long term pic num: " << pic_num;
137 return nullptr;
138 }
139
GetLowestFrameNumWrapShortRefPic()140 scoped_refptr<H264Picture> H264DPB::GetLowestFrameNumWrapShortRefPic() {
141 scoped_refptr<H264Picture> ret;
142 for (const auto& pic : pics_) {
143 if (pic->ref && !pic->long_term &&
144 (!ret || pic->frame_num_wrap < ret->frame_num_wrap))
145 ret = pic;
146 }
147 return ret;
148 }
149
GetNotOutputtedPicsAppending(H264Picture::Vector * out)150 void H264DPB::GetNotOutputtedPicsAppending(H264Picture::Vector* out) {
151 for (const auto& pic : pics_) {
152 if (!pic->outputted)
153 out->push_back(pic);
154 }
155 }
156
GetShortTermRefPicsAppending(H264Picture::Vector * out)157 void H264DPB::GetShortTermRefPicsAppending(H264Picture::Vector* out) {
158 for (const auto& pic : pics_) {
159 if (pic->ref && !pic->long_term)
160 out->push_back(pic);
161 }
162 }
163
GetLongTermRefPicsAppending(H264Picture::Vector * out)164 void H264DPB::GetLongTermRefPicsAppending(H264Picture::Vector* out) {
165 for (const auto& pic : pics_) {
166 if (pic->ref && pic->long_term)
167 out->push_back(pic);
168 }
169 }
170
171 } // namespace media
172