mirror of
https://github.com/gnif/LookingGlass.git
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5681dcdbe7
Forward coalesced feedback through the broker to the render clock. Keep capture independent and apply the rate to WaveRT timing. Bound and slew targets, then restore unity when feedback stalls. Withdraw feedback after the watchdog makes fallback safe.
171 lines
5.4 KiB
C++
171 lines
5.4 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 "Adapter.h"
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#include "Common.h"
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#include "Formats.h"
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class CMiniportWaveRT;
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class CMiniportWaveRTStream final :
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public IMiniportWaveRTStreamNotification,
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public IMiniportWaveRTInputStream,
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public IMiniportWaveRTOutputStream
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{
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public:
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CMiniportWaveRTStream(
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_In_ CMiniportWaveRT *miniport,
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_In_ CAudioAdapter *adapter,
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_In_ PPORTWAVERTSTREAM portStream,
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_In_ EndpointKind kind);
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~CMiniportWaveRTStream();
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NTSTATUS Initialize(
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_In_ const KSDATAFORMAT_WAVEFORMATEXTENSIBLE *format);
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STDMETHODIMP_(NTSTATUS) QueryInterface(
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_In_ REFIID interfaceId,
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_COM_Outptr_ void **object) override;
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STDMETHODIMP_(ULONG) AddRef() override;
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STDMETHODIMP_(ULONG) Release() override;
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STDMETHODIMP_(NTSTATUS) SetFormat(
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_In_ PKSDATAFORMAT dataFormat) override;
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STDMETHODIMP_(NTSTATUS) SetState(_In_ KSSTATE state) override;
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STDMETHODIMP_(NTSTATUS) GetPosition(
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_Out_ PKSAUDIO_POSITION position) override;
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STDMETHODIMP_(NTSTATUS) AllocateAudioBuffer(
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_In_ ULONG requestedSize,
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_Out_ PMDL *audioBufferMdl,
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_Out_ ULONG *actualSize,
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_Out_ ULONG *offsetFromFirstPage,
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_Out_ MEMORY_CACHING_TYPE *cacheType) override;
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STDMETHODIMP_(void) FreeAudioBuffer(
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_In_opt_ PMDL audioBufferMdl,
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_In_ ULONG bufferSize) override;
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STDMETHODIMP_(void) GetHWLatency(
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_Out_ PKSRTAUDIO_HWLATENCY latency) override;
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STDMETHODIMP_(NTSTATUS) GetPositionRegister(
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_Out_ PKSRTAUDIO_HWREGISTER positionRegister) override;
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STDMETHODIMP_(NTSTATUS) GetClockRegister(
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_Out_ PKSRTAUDIO_HWREGISTER clockRegister) override;
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STDMETHODIMP_(NTSTATUS) AllocateBufferWithNotification(
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_In_ ULONG notificationCount,
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_In_ ULONG requestedSize,
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_Out_ PMDL *audioBufferMdl,
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_Out_ ULONG *actualSize,
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_Out_ ULONG *offsetFromFirstPage,
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_Out_ MEMORY_CACHING_TYPE *cacheType) override;
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STDMETHODIMP_(void) FreeBufferWithNotification(
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_In_ PMDL audioBufferMdl,
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_In_ ULONG bufferSize) override;
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STDMETHODIMP_(NTSTATUS) RegisterNotificationEvent(
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_In_ PKEVENT notificationEvent) override;
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STDMETHODIMP_(NTSTATUS) UnregisterNotificationEvent(
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_In_ PKEVENT notificationEvent) override;
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STDMETHODIMP_(NTSTATUS) GetReadPacket(
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_Out_ ULONG *packetNumber,
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_Out_ DWORD *flags,
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_Out_ ULONG64 *performanceCounterValue,
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_Out_ BOOL *moreData) override;
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STDMETHODIMP_(NTSTATUS) SetWritePacket(
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_In_ ULONG packetNumber,
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_In_ DWORD flags,
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_In_ ULONG eosPacketLength) override;
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STDMETHODIMP_(NTSTATUS) GetOutputStreamPresentationPosition(
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_Out_ KSAUDIO_PRESENTATION_POSITION *position) override;
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STDMETHODIMP_(NTSTATUS) GetPacketCount(
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_Out_ ULONG *packetCount) override;
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private:
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static void TimerCallback(
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_In_ PEX_TIMER timer,
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_In_opt_ void *context);
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NTSTATUS AllocateBuffer(
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_In_ ULONG notificationCount,
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_In_ ULONG requestedSize,
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_Out_ PMDL *audioBufferMdl,
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_Out_ ULONG *actualSize,
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_Out_ ULONG *offsetFromFirstPage,
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_Out_ MEMORY_CACHING_TYPE *cacheType);
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void FreeBuffer(_In_opt_ PMDL audioBufferMdl);
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void StopTimer();
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void ArmTimerLocked();
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void AdvanceLocked(_In_ const AudioClockSnapshot &clock);
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void AdvanceEventPacketsLocked(
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_In_ const AudioClockSnapshot &clock);
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bool RenderPacketCommittedLocked(_In_ ULONGLONG position) const;
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void PublishRenderFramesLocked();
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void UpdatePresentationQpcLocked(
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_In_ const AudioClockSnapshot &clock);
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void TransferFramesLocked(
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_In_ ULONGLONG bytes,
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_In_ bool transferRender = true);
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void SignalNotificationsLocked();
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volatile LONG m_refCount;
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CMiniportWaveRT *m_miniport;
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CAudioAdapter *m_adapter;
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PPORTWAVERTSTREAM m_portStream;
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EndpointKind m_kind;
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KSDATAFORMAT_WAVEFORMATEXTENSIBLE m_format;
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FormatFingerprint m_fingerprint;
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KSSTATE m_state;
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KSPIN_LOCK m_positionLock;
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PEX_TIMER m_timer;
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bool m_hasRun;
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PMDL m_bufferMdl;
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BYTE *m_buffer;
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bool m_bufferAllocationPending;
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ULONG m_bufferSize;
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ULONG m_notificationCount;
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ULONG m_packetSize;
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ULONG m_renderPublicationSliceBytes;
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PKEVENT m_notificationEvents[8];
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ULONG m_notificationEventCount;
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ULONGLONG m_clockFrequency;
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ULONGLONG m_qpcFrequency;
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ULONGLONG m_clockRateQ32;
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ULONGLONG m_lastClockPosition;
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ULONGLONG m_lastQpcPosition;
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ULONGLONG m_lastPresentationQpc;
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ULONGLONG m_frameRemainder;
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ULONGLONG m_pendingBytes;
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ULONGLONG m_linearPosition;
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ULONG m_cyclicPosition;
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ULONGLONG m_renderPublishedPosition;
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ULONGLONG m_completedPackets;
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ULONGLONG m_lastReadPacket;
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ULONG m_lastWritePacket;
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bool m_eosReceived;
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bool m_eosNotificationSent;
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ULONGLONG m_eosLinearPosition;
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};
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