Drop an mp3 in, generate C++, fix up the hrcheck() with char * so it compiles...
Now, it builds fine. But when running it, there are NO pins found for CLSID_MP3DecoderDMO. So of course it can't find the in0 pin!
I'm on Windows 7, below is the pasted generated code, building on Visual Studio 2005:
//Don't forget to change project settings:
//1. C++: add include path to DirectShow include folder (such as c:\dxsdk\include)
//2. Link: add link path to DirectShow lib folder (such as c:\dxsdk\lib).
//3. Link: add strmiids.lib and quartz.lib
#include "stdafx.h"
#include <DShow.h>
#include <atlbase.h>
#include <initguid.h>
#include <dvdmedia.h>
BOOL hrcheck(HRESULT hr, char* errtext)
{
if (hr >= S_OK)
return FALSE;
TCHAR szErr[MAX_ERROR_TEXT_LEN];
DWORD res = AMGetErrorText(hr, szErr, MAX_ERROR_TEXT_LEN);
if (res)
printf("Error %x: %s\n%s\n",hr, errtext,szErr);
else
printf("Error %x: %s\n", hr, errtext);
return TRUE;
}
//change this macro to fit your style of error handling
#define CHECK_HR(hr, msg) if (hrcheck(hr, msg)) return hr;
CComPtr<IPin> GetPin(IBaseFilter *pFilter, LPCOLESTR pinname)
{
CComPtr<IEnumPins> pEnum;
CComPtr<IPin> pPin;
HRESULT hr = pFilter->EnumPins(&pEnum);
if (hrcheck(hr, "Can't enumerate pins."))
return NULL;
while(pEnum->Next(1, &pPin, 0) == S_OK)
{
PIN_INFO pinfo;
pPin->QueryPinInfo(&pinfo);
BOOL found = !wcsicmp(pinname, pinfo.achName);
if (pinfo.pFilter) pinfo.pFilter->Release();
if (found)
return pPin;
pPin.Release();
}
printf("Pin not found!\n");
return NULL;
}
// {94297043-BD82-4DFD-B0DE-8177739C6D20}
DEFINE_GUID(CLSID_MP3DecoderDMO,
0x94297043, 0xBD82, 0x4DFD, 0xB0, 0xDE, 0x81, 0x77, 0x73, 0x9C, 0x6D, 0x20); //qasf.dll
HRESULT BuildGraph(IGraphBuilder *pGraph, LPCOLESTR srcFile1)
{
HRESULT hr = S_OK;
//graph builder
CComPtr<ICaptureGraphBuilder2> pBuilder;
hr = pBuilder.CoCreateInstance(CLSID_CaptureGraphBuilder2);
CHECK_HR(hr, "Can't create Capture Graph Builder");
hr = pBuilder->SetFiltergraph(pGraph);
CHECK_HR(hr, "Can't SetFiltergraph");
//add File Source (Async.)
CComPtr<IBaseFilter> pFileSourceAsync;
hr = pFileSourceAsync.CoCreateInstance(CLSID_AsyncReader);
CHECK_HR(hr, "Can't create File Source (Async.)");
hr = pGraph->AddFilter(pFileSourceAsync, L"File Source (Async.)");
CHECK_HR(hr, "Can't add File Source (Async.) to graph");
//set source filename
CComQIPtr<IFileSourceFilter, &IID_IFileSourceFilter> pFileSourceAsync_src(pFileSourceAsync);
if (!pFileSourceAsync_src)
CHECK_HR(E_NOINTERFACE, "Can't get IFileSourceFilter");
hr = pFileSourceAsync_src->Load(srcFile1, NULL);
CHECK_HR(hr, "Can't load file");
//add MPEG-I Stream Splitter
CComPtr<IBaseFilter> pMPEGIStreamSplitter;
hr = pMPEGIStreamSplitter.CoCreateInstance(CLSID_MPEG1Splitter);
CHECK_HR(hr, "Can't create MPEG-I Stream Splitter");
hr = pGraph->AddFilter(pMPEGIStreamSplitter, L"MPEG-I Stream Splitter");
CHECK_HR(hr, "Can't add MPEG-I Stream Splitter to graph");
//connect File Source (Async.) and MPEG-I Stream Splitter
hr = pGraph->ConnectDirect(GetPin(pFileSourceAsync, L"Output"), GetPin(pMPEGIStreamSplitter, L"Input"), NULL);
CHECK_HR(hr, "Can't connect File Source (Async.) and MPEG-I Stream Splitter");
//add MP3 Decoder DMO
CComPtr<IBaseFilter> pMP3DecoderDMO;
hr = pMP3DecoderDMO.CoCreateInstance(CLSID_MP3DecoderDMO);
CHECK_HR(hr, "Can't create MP3 Decoder DMO");
hr = pGraph->AddFilter(pMP3DecoderDMO, L"MP3 Decoder DMO");
CHECK_HR(hr, "Can't add MP3 Decoder DMO to graph");
//connect MPEG-I Stream Splitter and MP3 Decoder DMO
hr = pGraph->ConnectDirect(GetPin(pMPEGIStreamSplitter, L"Audio"), GetPin(pMP3DecoderDMO, L"in0"), NULL);
CHECK_HR(hr, "Can't connect MPEG-I Stream Splitter and MP3 Decoder DMO");
//add Default DirectSound Device
CComPtr<IBaseFilter> pDefaultDirectSoundDevice;
hr = pDefaultDirectSoundDevice.CoCreateInstance(CLSID_DSoundRender);
CHECK_HR(hr, "Can't create Default DirectSound Device");
hr = pGraph->AddFilter(pDefaultDirectSoundDevice, L"Default DirectSound Device");
CHECK_HR(hr, "Can't add Default DirectSound Device to graph");
//connect MP3 Decoder DMO and Default DirectSound Device
hr = pGraph->ConnectDirect(GetPin(pMP3DecoderDMO, L"out0"), GetPin(pDefaultDirectSoundDevice, L"Audio Input pin (rendered)"), NULL);
CHECK_HR(hr, "Can't connect MP3 Decoder DMO and Default DirectSound Device");
return S_OK;
}
//int _tmain(int argc, _TCHAR* argv[]) //use this line in VS2008
int main(int argc, char* argv[])
{
CoInitialize(NULL);
CComPtr<IGraphBuilder> graph;
graph.CoCreateInstance(CLSID_FilterGraph);
printf("Building graph...\n");
HRESULT hr = BuildGraph(graph, L"C:\\Tmp\\mp3.mp3");
if (hr==S_OK) {
printf("Running");
CComQIPtr<IMediaControl, &IID_IMediaControl> mediaControl(graph);
hr = mediaControl->Run();
CHECK_HR(hr, "Can't run the graph");
CComQIPtr<IMediaEvent, &IID_IMediaEvent> mediaEvent(graph);
BOOL stop = FALSE;
MSG msg;
while(!stop)
{
long ev=0, p1=0, p2=0;
Sleep(500);
printf(".");
while(PeekMessage(&msg, NULL, 0,0, PM_REMOVE))
DispatchMessage(&msg);
while (mediaEvent->GetEvent(&ev, &p1, &p2, 0)==S_OK)
{
if (ev == EC_COMPLETE || ev == EC_USERABORT)
{
printf("Done!\n");
stop = TRUE;
}
else
if (ev == EC_ERRORABORT)
{
printf("An error occured: HRESULT=%x\n", p1);
mediaControl->Stop();
stop = TRUE;
}
mediaEvent->FreeEventParams(ev, p1, p2);
}
}
}
CoUninitialize();
return 0;
}
