mirror of
https://github.com/gnif/LookingGlass.git
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b75b90ff1d
Publish committed WaveRT render frames on a 4 kHz timer while keeping packet completion and notification semantics unchanged. Serialize clock sampling with position updates to prevent concurrent queries from replaying elapsed time.
170 lines
5.3 KiB
C++
170 lines
5.3 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_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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