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/*++
THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
PURPOSE.
Module Name:
offloadStreamEngine.h
Abstract:
Virtual Streaming Engine - this module controls offload streaming logic for
the device.
Environment:
Kernel mode
--*/
#pragma once
#include "streamengine.h"
#include "PositionSimClock.h"
#define MAX_FILE_WRITE_FRAMES (16)
#define OFFLOAD_PRESENTATION_POSITION_LAG_IN_MS (20)
class COffloadStreamEngine : public CStreamEngine
{
public:
__drv_maxIRQL(PASSIVE_LEVEL)
PAGED_CODE_SEG
COffloadStreamEngine(
_In_ ACXSTREAM Stream,
_In_ ACXDATAFORMAT StreamFormat,
_In_ CSimPeakMeter *circuitPeakmeter
);
virtual
__drv_maxIRQL(PASSIVE_LEVEL)
#pragma code_seg()
~COffloadStreamEngine();
virtual
__drv_maxIRQL(PASSIVE_LEVEL)
PAGED_CODE_SEG
NTSTATUS
PrepareHardware();
virtual
__drv_maxIRQL(PASSIVE_LEVEL)
PAGED_CODE_SEG
NTSTATUS
ReleaseHardware();
virtual
__drv_maxIRQL(PASSIVE_LEVEL)
PAGED_CODE_SEG
NTSTATUS
Run();
virtual
__drv_maxIRQL(PASSIVE_LEVEL)
PAGED_CODE_SEG
NTSTATUS
Pause();
virtual
__drv_maxIRQL(PASSIVE_LEVEL)
#pragma code_seg()
NTSTATUS
GetPresentationPosition(
_Out_ PULONGLONG PositionInBlocks,
_Out_ PULONGLONG QPCPosition
);
virtual
__drv_maxIRQL(PASSIVE_LEVEL)
PAGED_CODE_SEG
NTSTATUS
AssignDrmContentId(
_In_ ULONG DrmContentId,
_In_ PACXDRMRIGHTS DrmRights
);
virtual
__drv_maxIRQL(PASSIVE_LEVEL)
#pragma code_seg()
NTSTATUS
GetLinearBufferPosition(
_Out_ PULONGLONG Position
);
virtual
__drv_maxIRQL(PASSIVE_LEVEL)
PAGED_CODE_SEG
NTSTATUS
SetCurrentWritePosition(
_In_ ULONG Position
);
virtual
__drv_maxIRQL(PASSIVE_LEVEL)
PAGED_CODE_SEG
NTSTATUS
SetLastBufferPosition(
_In_ ULONG Position
);
protected:
WDFTIMER m_BufferReadTimer;
WDFTIMER m_LastBufferTimer;
CPositionSimClock m_LinearBufferClock;
CSaveData m_SaveData;
// Number of packets written by OS
ULONG m_PacketsWritten;
// Number of packets read by hardware
ULONG m_PacketsRead;
ULONG m_SinglePacketPosition;
virtual
__drv_maxIRQL(DISPATCH_LEVEL)
#pragma code_seg()
VOID
ProcessPacket();
virtual
__drv_maxIRQL(PASSIVE_LEVEL)
PAGED_CODE_SEG
NTSTATUS
SetCurrentWritePositionSinglePacket(
_In_ ULONG Position
);
static
__drv_maxIRQL(DISPATCH_LEVEL)
_Function_class_(EVT_WDF_TIMER)
#pragma code_seg()
VOID s_EvtBufferReadTimerCallback(
_In_ WDFTIMER Timer
);
static
__drv_maxIRQL(DISPATCH_LEVEL)
_Function_class_(EVT_WDF_TIMER)
#pragma code_seg()
VOID s_EvtLastBufferTimerCallback(
_In_ WDFTIMER Timer
);
// Callback indicating buffer read complete
virtual
__drv_maxIRQL(DISPATCH_LEVEL)
#pragma code_seg()
VOID
BufferReadCallback();
virtual
__drv_maxIRQL(DISPATCH_LEVEL)
#pragma code_seg()
VOID
LastBufferRenderComplete();
};
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