87 lines
2.6 KiB
C++
87 lines
2.6 KiB
C++
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/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "host/frontend/webrtc/cvd_video_frame_buffer.h"
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#include <map>
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#include <mutex>
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#include <vector>
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#include "common/libs/utils/size_utils.h"
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namespace cuttlefish {
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namespace {
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constexpr int kPlanePadding = 1024;
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constexpr int kLogAlignment = 6; // multiple of 2^6
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inline int AlignStride(int width) {
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return AlignToPowerOf2(width, kLogAlignment);
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}
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std::multimap<int, std::vector<uint8_t>> pool;
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std::mutex pool_mutex;
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std::vector<uint8_t> FromPool(int size) {
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{
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std::lock_guard<std::mutex> lock(pool_mutex);
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auto it = pool.find(size);
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if (it != pool.end()) {
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auto ret = std::move(it->second);
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pool.erase(it);
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return ret;
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}
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}
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return std::vector<uint8_t>(size);
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}
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void BackToPool(std::vector<uint8_t> item) {
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std::lock_guard<std::mutex> lock(pool_mutex);
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pool.insert({item.size(), std::move(item)});
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}
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} // namespace
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CvdVideoFrameBuffer::CvdVideoFrameBuffer(int width, int height)
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: width_(width),
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height_(height),
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y_(FromPool(AlignStride(width) * height + kPlanePadding)),
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u_(FromPool(AlignStride((width + 1) / 2) * ((height + 1) / 2) +
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kPlanePadding)),
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v_(FromPool(AlignStride((width + 1) / 2) * ((height + 1) / 2) +
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kPlanePadding)) {}
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CvdVideoFrameBuffer::~CvdVideoFrameBuffer() {
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BackToPool(std::move(y_));
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BackToPool(std::move(u_));
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BackToPool(std::move(v_));
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}
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int CvdVideoFrameBuffer::width() const { return width_; }
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int CvdVideoFrameBuffer::height() const { return height_; }
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int CvdVideoFrameBuffer::StrideY() const { return AlignStride(width_); }
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int CvdVideoFrameBuffer::StrideU() const {
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return AlignStride((width_ + 1) / 2);
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}
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int CvdVideoFrameBuffer::StrideV() const {
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return AlignStride((width_ + 1) / 2);
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}
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const uint8_t *CvdVideoFrameBuffer::DataY() const { return y_.data(); }
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const uint8_t *CvdVideoFrameBuffer::DataU() const { return u_.data(); }
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const uint8_t *CvdVideoFrameBuffer::DataV() const { return v_.data(); }
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} // namespace cuttlefish
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