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02d71fb882
Bug: webrtc:10342 Change-Id: Iff769d2604fd79784bcb09874d2803793d20bde5 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/167000 Reviewed-by: Philip Eliasson <philipel@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#30505}
78 lines
2.8 KiB
C++
78 lines
2.8 KiB
C++
/*
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* Copyright (c) 2020 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 "modules/video_coding/frame_dependencies_calculator.h"
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#include <stdint.h>
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#include <iterator>
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#include <set>
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#include "absl/algorithm/container.h"
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#include "absl/container/inlined_vector.h"
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#include "api/array_view.h"
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#include "api/video/video_frame_type.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/logging.h"
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namespace webrtc {
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absl::InlinedVector<int64_t, 5> FrameDependenciesCalculator::FromBuffersUsage(
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VideoFrameType frame_type,
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int64_t frame_id,
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rtc::ArrayView<const CodecBufferUsage> buffers_usage) {
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absl::InlinedVector<int64_t, 5> dependencies;
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RTC_DCHECK_GT(buffers_usage.size(), 0);
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for (const CodecBufferUsage& buffer_usage : buffers_usage) {
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RTC_CHECK_GE(buffer_usage.id, 0);
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if (buffers_.size() <= static_cast<size_t>(buffer_usage.id)) {
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buffers_.resize(buffer_usage.id + 1);
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}
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}
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std::set<int64_t> direct_depenendencies;
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std::set<int64_t> indirect_depenendencies;
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if (frame_type == VideoFrameType::kVideoFrameDelta) {
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for (const CodecBufferUsage& buffer_usage : buffers_usage) {
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if (!buffer_usage.referenced) {
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continue;
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}
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const BufferUsage& buffer = buffers_[buffer_usage.id];
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if (buffer.frame_id == absl::nullopt) {
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RTC_LOG(LS_ERROR) << "Odd configuration: frame " << frame_id
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<< " references buffer #" << buffer_usage.id
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<< " that was never updated.";
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continue;
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}
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direct_depenendencies.insert(*buffer.frame_id);
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indirect_depenendencies.insert(buffer.dependencies.begin(),
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buffer.dependencies.end());
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}
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// Reduce references: if frame #3 depends on frame #2 and #1, and frame #2
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// depends on frame #1, then frame #3 needs to depend just on frame #2.
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// Though this set diff removes only 1 level of indirection, it seems
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// enough for all currently used structures.
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absl::c_set_difference(direct_depenendencies, indirect_depenendencies,
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std::back_inserter(dependencies));
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}
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// Update buffers.
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for (const CodecBufferUsage& buffer_usage : buffers_usage) {
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if (!buffer_usage.updated) {
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continue;
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}
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BufferUsage& buffer = buffers_[buffer_usage.id];
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buffer.frame_id = frame_id;
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buffer.dependencies.assign(direct_depenendencies.begin(),
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direct_depenendencies.end());
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}
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return dependencies;
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}
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} // namespace webrtc
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