ILMDVRSource::ReadData

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#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.

Returns

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

See Also

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 Capture Buffers on More Than One Physical Disk, How to Copy Buffered DVR Data to a New File

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