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408a3c63d3
Also fix tests that relied on memory allocation behaviors. These only worked by chance in the past because the allocated sizes of planes changed enough to put them in a different location in memory. But there's no easy/valid way to ensure memory *wasn't* re-used, and the test doesn't really care anyways (if I420BufferPool could re-use the buffer object but change the resolution/stride, it'd still be fine). Bug: None Change-Id: I28135d58d23f194a0142e5a037fa9d315af6b1c8 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/130821 Commit-Queue: Noah Richards <noahric@chromium.org> Reviewed-by: Magnus Flodman <mflodman@webrtc.org> Cr-Commit-Position: refs/heads/master@{#27551}
76 lines
2.8 KiB
C++
76 lines
2.8 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 "common_video/include/i420_buffer_pool.h"
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#include <limits>
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#include "rtc_base/checks.h"
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namespace webrtc {
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I420BufferPool::I420BufferPool() : I420BufferPool(false) {}
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I420BufferPool::I420BufferPool(bool zero_initialize)
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: I420BufferPool(zero_initialize, std::numeric_limits<size_t>::max()) {}
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I420BufferPool::I420BufferPool(bool zero_initialize,
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size_t max_number_of_buffers)
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: zero_initialize_(zero_initialize),
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max_number_of_buffers_(max_number_of_buffers) {}
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I420BufferPool::~I420BufferPool() = default;
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void I420BufferPool::Release() {
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buffers_.clear();
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}
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rtc::scoped_refptr<I420Buffer> I420BufferPool::CreateBuffer(int width,
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int height) {
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// Default stride_y is width, default uv stride is width / 2 (rounding up).
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return CreateBuffer(width, height, width, (width + 1) / 2, (width + 1) / 2);
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}
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rtc::scoped_refptr<I420Buffer> I420BufferPool::CreateBuffer(int width,
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int height,
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int stride_y,
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int stride_u,
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int stride_v) {
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RTC_DCHECK_RUNS_SERIALIZED(&race_checker_);
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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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const auto& buffer = *it;
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if (buffer->width() != width || buffer->height() != height ||
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buffer->StrideY() != stride_y || buffer->StrideU() != stride_u ||
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buffer->StrideV() != stride_v) {
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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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}
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// Look for a free buffer.
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for (const rtc::scoped_refptr<PooledI420Buffer>& 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 the application. If the ref count is 1,
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// then the list we are looping over holds the only reference and it's safe
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// to reuse.
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if (buffer->HasOneRef())
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return buffer;
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}
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if (buffers_.size() >= max_number_of_buffers_)
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return nullptr;
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// Allocate new buffer.
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rtc::scoped_refptr<PooledI420Buffer> buffer =
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new PooledI420Buffer(width, height, stride_y, stride_u, stride_v);
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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 buffer;
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}
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} // namespace webrtc
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