900f97534b
Had to update I420BufferPool to allow zero-initializing buffers. BUG=chromium:500605, chromium:468365, webrtc:5428 Review URL: https://codereview.webrtc.org/1645543003 Cr-Commit-Position: refs/heads/master@{#11505}
96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/common_video/include/i420_buffer_pool.h"
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#include "webrtc/base/checks.h"
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namespace {
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// One extra indirection is needed to make |HasOneRef| work.
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class PooledI420Buffer : public webrtc::VideoFrameBuffer {
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public:
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explicit PooledI420Buffer(
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const rtc::scoped_refptr<webrtc::I420Buffer>& buffer)
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: buffer_(buffer) {}
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private:
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~PooledI420Buffer() override {}
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int width() const override { return buffer_->width(); }
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int height() const override { return buffer_->height(); }
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const uint8_t* data(webrtc::PlaneType type) const override {
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return buffer_->data(type);
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}
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uint8_t* MutableData(webrtc::PlaneType type) override {
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// Make the HasOneRef() check here instead of in |buffer_|, because the pool
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// also has a reference to |buffer_|.
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RTC_DCHECK(HasOneRef());
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return const_cast<uint8_t*>(buffer_->data(type));
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}
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int stride(webrtc::PlaneType type) const override {
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return buffer_->stride(type);
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}
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void* native_handle() const override { return nullptr; }
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rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() override {
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RTC_NOTREACHED();
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return nullptr;
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}
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friend class rtc::RefCountedObject<PooledI420Buffer>;
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rtc::scoped_refptr<webrtc::I420Buffer> buffer_;
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};
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} // namespace
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namespace webrtc {
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I420BufferPool::I420BufferPool(bool zero_initialize)
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: zero_initialize_(zero_initialize) {
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Release();
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}
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void I420BufferPool::Release() {
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thread_checker_.DetachFromThread();
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buffers_.clear();
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}
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rtc::scoped_refptr<VideoFrameBuffer> I420BufferPool::CreateBuffer(int width,
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int height) {
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RTC_DCHECK(thread_checker_.CalledOnValidThread());
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// Release buffers with wrong resolution.
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for (auto it = buffers_.begin(); it != buffers_.end();) {
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if ((*it)->width() != width || (*it)->height() != height)
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it = buffers_.erase(it);
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else
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++it;
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}
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// Look for a free buffer.
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for (const rtc::scoped_refptr<I420Buffer>& buffer : buffers_) {
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// If the buffer is in use, the ref count will be 2, one from the list we
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// are looping over and one from a PooledI420Buffer returned from
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// CreateBuffer that has not been released yet. If the ref count is 1
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// (HasOneRef), then the list we are looping over holds the only reference
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// and it's safe to reuse.
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if (buffer->HasOneRef())
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return new rtc::RefCountedObject<PooledI420Buffer>(buffer);
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}
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// Allocate new buffer.
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rtc::scoped_refptr<I420Buffer> buffer = new rtc::RefCountedObject<I420Buffer>(
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width, height);
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if (zero_initialize_)
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buffer->InitializeData();
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buffers_.push_back(buffer);
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return new rtc::RefCountedObject<PooledI420Buffer>(buffers_.back());
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}
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} // namespace webrtc
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