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ILMDVRSource::ReadData

#include "ILMDVRSource.h"

C Syntax	HRESULT ILMDVRSource_ReadData(pILMDVRSource, startOffset, minSize, maxSize, dwUserData, pData, pSizeRead)
C++ Syntax	HRESULT ReadData(startOffset, minSize, maxSize, dwUserData, pData, pSizeRead)

ILMDVRSource *pILMDVRSource;	pointer to an interface
double startOffset;	data read starting offset
long minSize;	minimum size to read
long maxSize;	maximum size to read
DWORD dwUserData;	Reserved
BYTE * pData;	pointer to a block of memory data
long * pSizeRead;	pointer to data read size

Reads the DVRSource data associated with the specified offset.

Parameter	Description
pILMDVRSource	Pointer to an ILMDVRSource interface.
startOffset	A double value indicating the starting offset for the read operation.
minSize	A long value specifying the minimum size to read.
maxSize	A long value specifying the maximum size to read.
dwUserData	Reserved.
pData	A pointer to a block of memory that will receive the read data.
pSizeRead	Pointer to a long type that will receive the size of the read data.

S_OK	The function was successful.
<> S_OK	An error occurred. Refer to the Error Codes or the HRESULT error codes in the DirectShow documentation.

Comments

S_OK if successful; otherwise, returns a code indicating the reason for failure:

E_UNEXPECTED = Unexpected invalid file handle

LTMM_E_DVR_DISCARDED_DATA = Data has been discarded due to a restart.

LTMM_E_DVR_CORRUPT_STUB_FILE = Corrupted .LBL file.

Required DLLs and Libraries

ILMDVRSource

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Win32, x64

Help Version 20.0.2020.4.2

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LEADTOOLS Multimedia C API Help

Elements:	ILMDVRSource::GetAvailabilityInfo, ILMDVRSource::CopyBufferToFile, ILMDVRSource::ResetToDefaultsEx, ILMDVRSource::GetBufferInfo
Topics:	Multimedia Function Group, DVR Function Groups, Introduction to the LEADTOOLS MPEG-2 Transport Module, DVR Component FAQs, LEAD DVR Sink Filter, Accessing the DVR Sink Object,How to Use the DVR Sink Object to Control Capture Buffer Settings (C++), How to Set DVR Buffer Locations on Multiple Physical Disks (C++), How to Copy Buffered DVR Data to a New File