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e6ac8ff162
Bug: webrtc:10342 Change-Id: I5e8a204881b94fe5786b14e27cefce2fe056e91b Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/178140 Reviewed-by: Björn Terelius <terelius@webrtc.org> Reviewed-by: Philip Eliasson <philipel@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31579}
63 lines
2.2 KiB
C++
63 lines
2.2 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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#ifndef MODULES_RTP_RTCP_SOURCE_ACTIVE_DECODE_TARGETS_HELPER_H_
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#define MODULES_RTP_RTCP_SOURCE_ACTIVE_DECODE_TARGETS_HELPER_H_
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#include <stdint.h>
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#include <bitset>
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#include "absl/types/optional.h"
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#include "api/array_view.h"
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namespace webrtc {
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// Helper class that decides when active_decode_target_bitmask should be written
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// into the dependency descriptor rtp header extension.
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// See: https://aomediacodec.github.io/av1-rtp-spec/#a44-switching
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// This class is thread-compatible
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class ActiveDecodeTargetsHelper {
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public:
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ActiveDecodeTargetsHelper() = default;
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ActiveDecodeTargetsHelper(const ActiveDecodeTargetsHelper&) = delete;
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ActiveDecodeTargetsHelper& operator=(const ActiveDecodeTargetsHelper&) =
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delete;
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~ActiveDecodeTargetsHelper() = default;
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// Decides if active decode target bitmask should be attached to the frame
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// that is about to be sent.
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void OnFrame(rtc::ArrayView<const int> decode_target_protected_by_chain,
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std::bitset<32> active_decode_targets,
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bool is_keyframe,
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int64_t frame_id,
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rtc::ArrayView<const int> chain_diffs);
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// Returns active decode target to attach to the dependency descriptor.
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absl::optional<uint32_t> ActiveDecodeTargetsBitmask() const {
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if (unsent_on_chain_.none())
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return absl::nullopt;
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return last_active_decode_targets_.to_ulong();
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}
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std::bitset<32> ActiveChainsBitmask() const { return last_active_chains_; }
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private:
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// `unsent_on_chain_[i]` indicates last active decode
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// target bitmask wasn't attached to a packet on the chain with id `i`.
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std::bitset<32> unsent_on_chain_ = 0;
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std::bitset<32> last_active_decode_targets_ = 0;
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std::bitset<32> last_active_chains_ = 0;
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int64_t last_frame_id_ = 0;
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};
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} // namespace webrtc
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#endif // MODULES_RTP_RTCP_SOURCE_ACTIVE_DECODE_TARGETS_HELPER_H_
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