#include "ltmm.h"
C Syntax |
HRESULT IltmmConvert_get_SourceProgramCount(pConvert, pVal) |
C++ Syntax |
HRESULT get_SourceProgramCount(pVal) |
IltmmConvert *pConvert; |
pointer to an interface |
long *pVal; |
pointer to a variable |
Get the number of programs in the current file.
Parameter | Description | |
pConvert | Pointer to an IltmmConvert interface. | |
pVal | Pointer to a variable to be updated with the number of programs. In most cases, this value will be filled with 1. |
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. |
See the Programs and Streams topic for more information on programs and streams. You can change the current program using IltmmConvert::put_CurrentSourceProgram.
You can get the number of streams in the current program by calling IltmmConvert::get_SourceStreamCount.
Required DLLs and Libraries
LTMM 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
IltmmConvert::put_CurrentSourceProgram, IltmmConvert::get_CurrentSourceProgram, IltmmConvert::get_SourceStreamCount |
|
|
C++ example:
/* This example will select the last program of a multi-program file. There is no error checking to make the example easier to understand */
void SelectLastProgram(IltmmConvert *pConvert)
{
long SourceProgramCount = 0;
pConvert->get_SourceProgramCount(&SourceProgramCount);
if(SourceProgramCount > 1)
{
/* If there is more than one program, select the last program. If there is only one program, you are already on the last program. The program index is 0-based, so the allowed value to pass to IltmmConvert::put_CurrentSourceProgram is between 0 and SourceProgramCount - 1 */
pConvert->put_CurrentSourceProgram(SourceProgramCount - 1);
}
}
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