1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "host/frontend/webrtc/cvd_video_frame_buffer.h"
18
19 #include "common/libs/utils/size_utils.h"
20
21 namespace cuttlefish {
22
23 namespace {
24 constexpr int kPlanePadding = 1024;
25 constexpr int kLogAlignment = 6; // multiple of 2^6
26
AlignStride(int width)27 inline int AlignStride(int width) {
28 return AlignToPowerOf2(width, kLogAlignment);
29 }
30
31 } // namespace
32
CvdVideoFrameBuffer(int width,int height)33 CvdVideoFrameBuffer::CvdVideoFrameBuffer(int width, int height)
34 : width_(width),
35 height_(height),
36 y_(AlignStride(width) * height + kPlanePadding),
37 u_(AlignStride((width + 1) / 2) * ((height + 1) / 2) + kPlanePadding),
38 v_(AlignStride((width + 1) / 2) * ((height + 1) / 2) + kPlanePadding) {}
39
width() const40 int CvdVideoFrameBuffer::width() const { return width_; }
height() const41 int CvdVideoFrameBuffer::height() const { return height_; }
42
StrideY() const43 int CvdVideoFrameBuffer::StrideY() const { return AlignStride(width_); }
StrideU() const44 int CvdVideoFrameBuffer::StrideU() const {
45 return AlignStride((width_ + 1) / 2);
46 }
StrideV() const47 int CvdVideoFrameBuffer::StrideV() const {
48 return AlignStride((width_ + 1) / 2);
49 }
50
DataY() const51 const uint8_t *CvdVideoFrameBuffer::DataY() const { return y_.data(); }
DataU() const52 const uint8_t *CvdVideoFrameBuffer::DataU() const { return u_.data(); }
DataV() const53 const uint8_t *CvdVideoFrameBuffer::DataV() const { return v_.data(); }
54
55 } // namespace cuttlefish
56