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https://github.com/gnif/LookingGlass.git
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5e07786468
Expose cancel-safe direct-I/O queues for reading rendered frames and writing captured frames through the private broker endpoint. Separate render and capture storage, publish format and state generations, and preserve local loopback while no broker is bound.
125 lines
3.4 KiB
C++
125 lines
3.4 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 "AudioClock.h"
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#include "Common.h"
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#include "RingBuffer.h"
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struct AudioStreamSnapshot
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{
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KSSTATE state;
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bool formatValid;
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UCHAR reserved[3];
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ULONGLONG generation;
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FormatFingerprint format;
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};
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class CAudioAdapter final : public IUnknown
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{
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public:
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CAudioAdapter();
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~CAudioAdapter();
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NTSTATUS Initialize();
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_IRQL_requires_max_(DISPATCH_LEVEL)
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NTSTATUS ConfigureStream(
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_In_ EndpointKind kind,
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_In_ const FormatFingerprint &format);
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_IRQL_requires_max_(DISPATCH_LEVEL)
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void SetStreamState(
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_In_ EndpointKind kind,
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_In_ KSSTATE state);
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_IRQL_requires_max_(DISPATCH_LEVEL)
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void GetStreamSnapshot(
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_In_ EndpointKind kind,
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_Out_ AudioStreamSnapshot *snapshot);
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_IRQL_requires_max_(DISPATCH_LEVEL)
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void SetBrokerActive(_In_ bool active);
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_IRQL_requires_max_(DISPATCH_LEVEL)
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void ResetCapture();
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_IRQL_requires_max_(DISPATCH_LEVEL)
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void WriteRenderFrames(
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_In_reads_bytes_(bytes) const BYTE *data,
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_In_ ULONG bytes);
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_IRQL_requires_max_(DISPATCH_LEVEL)
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void ReadCaptureFrames(
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_In_ const FormatFingerprint &format,
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_Out_writes_bytes_(bytes) BYTE *data,
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_In_ ULONG bytes);
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_IRQL_requires_max_(DISPATCH_LEVEL)
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void DiscardCaptureFrames(
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_In_ const FormatFingerprint &format,
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_In_ ULONGLONG bytes);
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_IRQL_requires_max_(DISPATCH_LEVEL)
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NTSTATUS ReadRenderFrames(
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_In_ const FormatFingerprint &format,
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_In_ ULONGLONG streamGeneration,
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_Out_writes_bytes_(capacity) BYTE *data,
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_In_ ULONG capacity,
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_Out_ PULONG bytesRead,
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_Out_ bool *discontinuity);
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_IRQL_requires_max_(DISPATCH_LEVEL)
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NTSTATUS WriteCaptureFrames(
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_In_ const FormatFingerprint &format,
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_In_ ULONGLONG streamGeneration,
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_In_ bool discontinuity,
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_In_reads_bytes_(bytes) const BYTE *data,
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_In_ ULONG bytes,
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_Out_ PULONG droppedBytes);
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_IRQL_requires_max_(DISPATCH_LEVEL)
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AudioClockSnapshot GetClockSnapshot() const;
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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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private:
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volatile LONG m_refCount;
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volatile LONG m_brokerActive;
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volatile LONG m_renderDiscontinuity;
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KSPIN_LOCK m_transportLock;
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KSPIN_LOCK m_streamStateLock;
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AudioStreamSnapshot m_renderState;
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AudioStreamSnapshot m_captureState;
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CAudioClock m_clock;
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CAudioRingBuffer m_renderRing;
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CAudioRingBuffer m_captureRing;
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};
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NTSTATUS StartAudioDevice(
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_In_ PDEVICE_OBJECT deviceObject,
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_In_ PIRP irp,
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_In_ PRESOURCELIST resourceList);
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