blob: c403eeb4fcba14a499f2b091040cd3158817ddb5 [file] [log] [blame]
magjed@webrtc.org73d763e2015-03-17 11:40:45 +00001/*
2 * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020011#include "common_video/include/i420_buffer_pool.h"
magjed@webrtc.org73d763e2015-03-17 11:40:45 +000012
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020013#include "rtc_base/checks.h"
magjed@webrtc.org73d763e2015-03-17 11:40:45 +000014
magjed@webrtc.org73d763e2015-03-17 11:40:45 +000015namespace webrtc {
16
Paulina Hensmana680a6a2018-04-05 11:42:24 +020017I420BufferPool::I420BufferPool() : I420BufferPool(false) {}
18I420BufferPool::I420BufferPool(bool zero_initialize)
19 : I420BufferPool(zero_initialize, std::numeric_limits<size_t>::max()) {}
Per00983572016-11-04 08:57:26 +010020I420BufferPool::I420BufferPool(bool zero_initialize,
21 size_t max_number_of_buffers)
22 : zero_initialize_(zero_initialize),
23 max_number_of_buffers_(max_number_of_buffers) {}
Paulina Hensmana680a6a2018-04-05 11:42:24 +020024I420BufferPool::~I420BufferPool() = default;
pbos@webrtc.orga3209a22015-03-20 13:35:56 +000025
26void I420BufferPool::Release() {
pbos@webrtc.orga3209a22015-03-20 13:35:56 +000027 buffers_.clear();
magjed@webrtc.org73d763e2015-03-17 11:40:45 +000028}
29
nissed591e3f2016-05-26 06:49:55 -070030rtc::scoped_refptr<I420Buffer> I420BufferPool::CreateBuffer(int width,
31 int height) {
Magnus Jedvert7fd92862016-09-17 11:27:35 +020032 RTC_DCHECK_RUNS_SERIALIZED(&race_checker_);
magjed@webrtc.org73d763e2015-03-17 11:40:45 +000033 // Release buffers with wrong resolution.
34 for (auto it = buffers_.begin(); it != buffers_.end();) {
35 if ((*it)->width() != width || (*it)->height() != height)
36 it = buffers_.erase(it);
37 else
38 ++it;
39 }
40 // Look for a free buffer.
nissed591e3f2016-05-26 06:49:55 -070041 for (const rtc::scoped_refptr<PooledI420Buffer>& buffer : buffers_) {
42 // If the buffer is in use, the ref count will be >= 2, one from the list we
43 // are looping over and one from the application. If the ref count is 1,
44 // then the list we are looping over holds the only reference and it's safe
45 // to reuse.
46 if (buffer->HasOneRef())
47 return buffer;
magjed@webrtc.org73d763e2015-03-17 11:40:45 +000048 }
Per00983572016-11-04 08:57:26 +010049
50 if (buffers_.size() >= max_number_of_buffers_)
51 return nullptr;
magjed@webrtc.org73d763e2015-03-17 11:40:45 +000052 // Allocate new buffer.
nissed591e3f2016-05-26 06:49:55 -070053 rtc::scoped_refptr<PooledI420Buffer> buffer =
54 new PooledI420Buffer(width, height);
hbos900f9752016-02-05 08:08:34 -080055 if (zero_initialize_)
56 buffer->InitializeData();
57 buffers_.push_back(buffer);
nissed591e3f2016-05-26 06:49:55 -070058 return buffer;
magjed@webrtc.org73d763e2015-03-17 11:40:45 +000059}
60
61} // namespace webrtc