#include "ltmm.h"
#include "Filters/ILMMpg2MxT.h"
#include <time.h>
HRESULT UseFilterCache_Example (IltmmCapture* pCapture)
{
HRESULT hr;
IltmmDevices* devices = NULL;
IltmmCompressors* compressors = NULL;
IltmmTargetFormats* pformats = NULL;
IltmmTargetFormat* pformat = NULL;
IUnknown* pUnknown = NULL;
ILMMpg2MxT* pMpgMux = NULL;
long lIndex = 0;
BSTR bstr;
// mpeg2 compressor
static TCHAR SZ_MPEG2_Compressor[] = "@device:sw:{33D9A760-90C8-11D0-BD43-00A0C911CE86}\\LEAD MPEG2 Encoder (3.0)";
// get the video devices collection
hr = IltmmCapture_get_VideoDevices(pCapture, &devices);
if(FAILED(hr))
return hr;
// select the capture device
hr = IltmmDevices_put_Selection(devices, 1); // Use a different video device if you want
// release the video devices collection object
IltmmDevices_Release(devices);
if(FAILED(hr))
return hr;
// get the video compressors collection
hr = IltmmCapture_get_VideoCompressors(pCapture, &compressors);
if(FAILED(hr))
return hr;
// find mpeg2 compressor
hr = IltmmCompressors_Find(compressors, T2OLE(SZ_MPEG2_Compressor), &lIndex);
if(FAILED(hr) || lIndex == -1)
{
// release the compressors collection object
IltmmCompressors_Release(compressors);
return S_FALSE;
}
// set the video compressor (only if the capture device is not already capturing compressed video)
IltmmCompressors_put_Selection(compressors, lIndex);
// release the compressors collection object
IltmmCompressors_Release(compressors);
// set the target output file
bstr = SysAllocString(L"c:\\CaptureKLV.avi");
IltmmCapture_put_TargetFile(pCapture, bstr);
SysFreeString(bstr);
// just 10 seconds of capture time
IltmmCapture_put_UseTimeLimit (pCapture, VARIANT_TRUE);
IltmmCapture_put_TimeLimit(pCapture, 10);
// get the target formats collection
hr = IltmmCapture_get_TargetFormats(pCapture, &pformats);
if(FAILED(hr))
return hr;
// get the MPEG2Transport target format object
hr = IltmmTargetFormats_Item(pformats, ltmmCapture_TargetFormat_MPEG2_TRANSPORT, &pformat);
if(FAILED(hr))
{
// release the formats collection object
IltmmTargetFormats_Release(pformats);
return hr;
}
// IN a capture situation
// in order to get the mux in a capture situation, set the UseFilterCache property for the target format to TRUE
// This tells the toolkit to create a Mux object and keep it around when building or rebuilding graphs
// enable filter cache
hr = IltmmTargetFormat_put_UseFilterCache(pformat, VARIANT_TRUE);
if(FAILED(hr))
{
// release the format and collection objects
IltmmTargetFormat_Release(pformat);
IltmmTargetFormats_Release(pformats);
return hr;
}
// select MPEG2Transport target format
hr = IltmmCapture_put_TargetFormat (pCapture, ltmmCapture_TargetFormat_MPEG2_TRANSPORT);
if(FAILED(hr))
return hr;
// get the multiplexer object for this format
hr = IltmmTargetFormat_GetCacheObject(pformat, ltmmTargetFormat_Object_Mux, &pUnknown);
if(FAILED(hr))
{
// release the format and collection objects
IltmmTargetFormat_Release(pformat);
IltmmTargetFormats_Release(pformats);
return hr;
}
// release the format and collection objects
IltmmTargetFormat_Release(pformat);
IltmmTargetFormats_Release(pformats);
hr = IUnknown_QueryInterface(pUnknown, &IID_ILMMpg2MxT, (void **)&pMpgMux);
IUnknown_Release(pUnknown);
if(FAILED(hr))
return hr;
if(pMpgMux)
{
ILMMpg2MxT_put_PrivateDataPID(pMpgMux, 0x70);
ILMMpg2MxT_put_PrivateDataFormatID(pMpgMux, 0x41564c4b);
ILMMpg2MxT_put_EnablePrivateData(pMpgMux, VARIANT_TRUE);
}
// release the multiplexer object
ILMMpg2MxT_Release(pMpgMux);
// start capture
hr = IltmmCapture_StartCapture(pCapture, ltmmCapture_Mode_Video);
if(FAILED(hr))
return hr;
hr = WriteKLVData(pMpgMux);
return hr;
}
HRESULT WriteKLVData (ILMMpg2MxT* pMpgMux )
{
HRESULT hr = S_OK;
time_t basetime;
unsigned __int64 timestamp ;
ILMKlvBuilder* builder = NULL;
VARIANT v;
BSTR bstr;
time(&basetime);
timestamp = ((unsigned __int64) basetime * 1000000);
// get the mux builder
hr = ILMMpg2MxT_get_KlvBuilder(pMpgMux, &builder);
if(FAILED(hr))
goto abort;
// clear out any existing data
ILMKlvBuilder_Clear(builder);
bstr = SysAllocString(L"06 0E 2B 34 01 01 01 03 07 02 01 01 01 05 00 00");
// write the UDS timestamp
hr = ILMKlvBuilder_InsertUInt64(builder, -1L, bstr, timestamp);
SysFreeString(bstr);
if(FAILED(hr))
{
ILMKlvBuilder_Release(builder);
goto abort;
}
// get KLV data
VariantInit(&v);
hr = ILMKlvBuilder_GetData(builder, &v);
if(FAILED(hr))
{
ILMKlvBuilder_Release(builder);
goto abort;
}
// write one KLV data at the beginning
hr = ILMMpg2MxT_WritePrivateData(pMpgMux, Mpg2MxT_WriteFlag_PTSValid | Mpg2MxT_WriteFlag_PTSInSeconds, 1.0, v, -1);
VariantClear(&v);
if(FAILED(hr))
{
ILMKlvBuilder_Release(builder);
goto abort;
}
ILMKlvBuilder_Release(builder);
abort:
// close the stream
ILMMpg2MxT_ClosePrivateData(pMpgMux);
return hr;
}
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