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114 lines
3.5 KiB
114 lines
3.5 KiB
#pragma once
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <condition_variable>
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#include <memory>
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#include <mutex>
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#include <unordered_map>
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#include "common/libs/concurrency/thread_annotations.h"
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#include "host/frontend/vnc_server/vnc_utils.h"
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namespace cuttlefish {
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namespace vnc {
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class VncClientConnection;
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class FrameBufferWatcher;
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using StripePtrVec = std::vector<std::shared_ptr<const Stripe>>;
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using SeqNumberVec = std::vector<StripeSeqNumber>;
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SeqNumberVec MakeSeqNumberVec();
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class BlackBoard {
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private:
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struct ClientFBUState {
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bool ready_to_receive{};
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ScreenOrientation orientation{};
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std::condition_variable new_frame_cv;
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SeqNumberVec stripe_seq_nums = MakeSeqNumberVec();
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bool closed{};
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};
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public:
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class Registerer {
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public:
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Registerer(BlackBoard* bb, const VncClientConnection* conn)
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: bb_{bb}, conn_{conn} {
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bb->Register(conn);
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}
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~Registerer() { bb_->Unregister(conn_); }
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Registerer(const Registerer&) = delete;
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Registerer& operator=(const Registerer&) = delete;
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private:
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BlackBoard* bb_{};
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const VncClientConnection* conn_{};
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};
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BlackBoard() = default;
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BlackBoard(const BlackBoard&) = delete;
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BlackBoard& operator=(const BlackBoard&) = delete;
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bool NoNewStripesFor(const SeqNumberVec& seq_nums) const REQUIRES(m_);
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void NewStripeReady(int index, StripeSeqNumber seq_num);
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void Register(const VncClientConnection* conn);
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void Unregister(const VncClientConnection* conn);
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StripePtrVec WaitForSenderWork(const VncClientConnection* conn);
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void WaitForAtLeastOneClientConnection();
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void FrameBufferUpdateRequestReceived(const VncClientConnection* conn);
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// Setting orientation implies needing the entire screen
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void SetOrientation(const VncClientConnection* conn,
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ScreenOrientation orientation);
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void SignalClientNeedsEntireScreen(const VncClientConnection* conn);
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void StopWaiting(const VncClientConnection* conn);
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void set_frame_buffer_watcher(FrameBufferWatcher* frame_buffer_watcher);
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// quality_level must be the value received from the client, in the range
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// [kJpegMinQualityEncoding, kJpegMaxQualityEncoding], else it is ignored.
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void set_jpeg_quality_level(int quality_level);
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int jpeg_quality_level() const {
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std::lock_guard<std::mutex> guard(m_);
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return jpeg_quality_level_;
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}
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private:
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ClientFBUState& GetStateForClient(const VncClientConnection* conn)
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REQUIRES(m_);
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static void ResetToZero(SeqNumberVec* seq_nums);
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mutable std::mutex m_;
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SeqNumberVec most_recent_stripe_seq_nums_ GUARDED_BY(m_) = MakeSeqNumberVec();
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std::unordered_map<const VncClientConnection*, ClientFBUState> clients_
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GUARDED_BY(m_);
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int jpeg_quality_level_ GUARDED_BY(m_) = 100;
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std::condition_variable new_client_cv_;
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// NOTE the FrameBufferWatcher pointer itself should be
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// guarded, but not the pointee.
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FrameBufferWatcher* frame_buffer_watcher_ GUARDED_BY(m_){};
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};
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} // namespace vnc
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} // namespace cuttlefish
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