mirror of
https://github.com/gnif/LookingGlass.git
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36e170d93a
Replace the single-owner PCM queues with one shared LGMP SPMC stream. Give each admitted client reliable state and an independent playback cursor, while clients without clock authority resample locally. Extend the audio protocol with per-client epochs and barriers. Keep capture exclusive and bound authority backpressure so slow secondary readers cannot affect the disciplined low-latency path.
94 lines
2.9 KiB
C++
94 lines
2.9 KiB
C++
/**
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* Looking Glass
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* Copyright © 2017-2026 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#pragma once
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#include "CSRWLock.h"
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#include "transport/lgmp/CLGMPHost.h"
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#include "transport/IControlSink.h"
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#include <LGProtocol/KVMFR.h>
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#include <Windows.h>
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#include <wdf.h>
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#include <IddCx.h>
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#include <memory>
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class CLGMPTransport;
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class CLGMPAudio;
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class CLGMPControl final : public IControlSink
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{
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private:
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friend class CLGMPTransport;
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friend class CLGMPAudio;
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static constexpr int POINTER_SHAPE_BUFFERS = 3;
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static constexpr int COLOR_TRANSFORM_BUFFERS = 3;
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CLGMPHost& m_host;
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PLGMPHostQueue m_pointerQueue = nullptr;
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PLGMPMemory m_pointerMemory[LGMP_Q_POINTER_LEN] = {};
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PLGMPMemory m_pointerShapeMemory[POINTER_SHAPE_BUFFERS] = {};
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PLGMPMemory m_pointerTransformMemory[COLOR_TRANSFORM_BUFFERS] = {};
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int m_pointerMemoryIndex = 0;
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int m_pointerShapeIndex = 0;
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int m_pointerTransformIndex = 0;
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mutable CSRWLock m_eventLock;
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IControlEvents * m_events = nullptr;
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ControlToken m_token = {};
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PLGMPMemory FindAvailable(
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PLGMPMemory * memory, int count, int& index) const;
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ControlResult SendColorTransform(
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const std::shared_ptr<const D12ColorTransform>& transform);
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bool Initialize();
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void DeInit();
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LGMP_STATUS ReadDataWithSource(void * data, size_t * size,
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uint32_t * sourceClientID);
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LGMP_STATUS AckData();
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LGMP_STATUS PostForClient(uint64_t udata, PLGMPMemory memory,
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uint32_t clientID, unsigned& recipients);
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bool PayloadPending(PLGMPMemory memory) const;
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LGMP_STATUS GetClientIDs(
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uint32_t clientIDs[LGMP_MAX_CLIENTS], unsigned& count) const;
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bool HasNewSubscribers();
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void RequestReplay();
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public:
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explicit CLGMPControl(CLGMPHost& host) :
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m_host(host) {}
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~CLGMPControl() override;
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CLGMPControl(const CLGMPControl&) = delete;
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CLGMPControl& operator=(const CLGMPControl&) = delete;
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void SetControlEvents(
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IControlEvents * events, const ControlToken& token) override;
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ControlResult SendCursor(const IDARG_OUT_QUERY_HWCURSOR& info,
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const BYTE * data, size_t size, UINT sdrWhiteLevel) override;
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ControlResult SetColorTransform(
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std::shared_ptr<const D12ColorTransform> transform) override;
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};
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