[directmusic] DM-test
- From: tomas <tomas.elf@xxxxxxxxxxxx>
- To: d99elf@xxxxxxxxxxxxxxxx, directmusic@xxxxxxxxxxxxx
- Date: Wed, 16 Feb 2005 17:35:31 +0100
Hi everyone,
I'm Tomas, Directmusic programmer of a small game development group and
reader of this mailing list for quite some time now.
I've noticed that there's a lot of smart people around here, so I hope
someone can help me with a Directmusic problem that I'm having :-).
The background: I must find a way to load Directmusic-objects without using
the specific file functions in
IDirectMusicLoader8 (e.g LoadObjectFromFile, SetSearchDirectory etc). The
reason for this is that the Directmusic
module in our system will not have access to any files, but instead will be
given a pointer to the data that I probably will
be able to load using IDirectMusicLoader8::GetObject. I'm pretty sure that
I've managed to load a segment consisting of a number of wavetracks by
first using IDirectMusicLoader8::SetObject on the wave-files referred to by
the script, and then loading the Segment like usual.
Now, the problem is: This does not seem to work too well with scripts (or
containers in general, I suspect). The only way I've
managed to load a script is by either embedding all references in the
script or by placing all referred files in the same directory
and then pointing IDirectMusicLoader8::SetSearchDirectory to that
directory. But, as I said before, the latter one does not meet
our requirements (and obviously, the first one is very inefficient if I
want to use the same file in a lot of scripts). So, I need to be able
to load scripts by using IDirectMusicLoader8::SetObject or by some other
solution that lets me give the loader a pointer to the data.
What I thought was that you could simply use IDirectMusicLoader8::SetObject
on all the objects that are referred to by the script,
and then simply load the script, just as with segments. Is this not
possible? Here's an excerpt of how the current, flawed solution looks like:
<CODE>
int main()
{
//*snip*
//First run SetObject on all files that the script refers to. The
LoaderSetObject simply runs SetObject on the file passed to it.
hr = LoaderSetObject(g_pLoader, CLSID_DirectMusicAudioPathConfig,
L"Audiopath_AllCh", L"C:\\Runtimefiles\\Audiopath_AllCh.aud");
hr = LoaderSetObject(g_pLoader, CLSID_DirectSoundWave,
L"Riff_Bass-01", L"C:\\Runtimefiles\\Riff_Bass-01.wav");
//... *snip* LoaderSetObject of all other referred files is
omitted from this code listing...
WCHAR wcharFilename[] = L"C:\\Runtimefiles\\TestScript1.spt";
WCHAR wcharRoutine[] = L"PlaySegment";
//... Then load & play the script.
hr = PlayScript(g_pLoader, g_pPerformance, pScript, wcharFilename,
wcharRoutine);
//*snip*
} //End main
/*
LoaderSetObject:
Lets the loader know where all referred files can be found when
loading a script.
pLoader: The Directmusic loader
guidClass: The class id of the object to give to SetObject.
wcharObjName: The internal name of the object to set [optional]
wcharFilepath: The path+filename to the object that is going to be
set.
*/
HRESULT LoaderSetObject(IDirectMusicLoader8* &pLoader, GUID guidClass,
WCHAR* wcharObjName, WCHAR* wcharFilepath)
{
DMUS_OBJECTDESC objDesc;
HRESULT hr;
ZeroMemory(&objDesc,sizeof(objDesc));
objDesc.dwSize = sizeof(objDesc);
objDesc.guidClass = guidClass;
wcscpy(objDesc.wszFileName, wcharFilepath);
objDesc.dwValidData = DMUS_OBJ_FULLPATH | DMUS_OBJ_CLASS;
if (wcharObjName)
{
wcsncpy(objDesc.wszName, wcharObjName,
sizeof(objDesc.wszName) - 1);
objDesc.wszName[sizeof(objDesc.wszName) - 1] = 0;
objDesc.dwValidData |= DMUS_OBJ_NAME;
}
hr = pLoader->SetObject(&objDesc);
return hr;
}
/*
PlayScript:
Loads and plays the script.
pLoader & pPerformance: Obvious ;-)
pScript: Return variable of the script object loaded by PlayScript
wcharFilename: The path+filename of the script to load & play.
wcharRoutinge: The name of the script routine to play.
*/
HRESULT PlayScript(IDirectMusicLoader8* &pLoader, IDirectMusicPerformance8*
&pPerformance, IDirectMusicScript8* &pScript, WCHAR* wcharFilename, WCHAR*
wcharRoutine)
{
HRESULT hr;
DMUS_SCRIPT_ERRORINFO errInfo;
DMUS_OBJECTDESC objDesc;
try
{
if (!pLoader || !pPerformance)
return E_INVALIDARG;
ZeroMemory(&objDesc,sizeof(objDesc));
objDesc.dwSize = sizeof(DMUS_OBJECTDESC);
objDesc.guidClass = CLSID_DirectMusicScript;
wcscpy(objDesc.wszFileName, wcharFilename);
objDesc.dwValidData = DMUS_OBJ_FULLPATH | DMUS_OBJ_CLASS;
//ERROR PRINTOUT FROM DIRECTX DEBUG WHEN DOING THIS GETOBJECT.
hr = pLoader->GetObject(&objDesc, IID_IDirectMusicScript, (LPVOID
*) &pScript);
if (FAILED (hr = pScript->Init(pPerformance, &errInfo)))
{
pScript->Release();
return E_FAIL;
}
hr = pScript->CallRoutine(wcharRoutine, &errInfo);
MessageBox(NULL, "Script", "Playing", MB_OK);
pPerformance->Stop(NULL, NULL, 0, 0);
pScript->Release();
return S_OK;
} //End try
catch(...)
{
DEBUG ("PlayScript Exception!\n");
return S_FALSE;
}
} //End PlayScript
</CODE>
You may wonder why I load files in this code example when I told you that I
would not use files. That's because I thought that it would be
easy to just replace the file references with memory references later on,
since I use SetObject.
Now, what happens is that when reaching the row: "hr =
pLoader->GetObject(&objDesc, IID_IDirectMusicScript, (LPVOID *) &pScript);" in
the PlayScript-method above, I get the following debug printout from
direct-x in my output window in Visual Studio and the &pScript is still
unallocated:
DMLOADER: Warning: The file Riff_Bass-01.wav couldn't be opened: No such
file or directory
. Try another path.
DMLOADER: Warning: The file Riff_Chords-01.wav couldn't be opened: No such
file or directory
. Try another path.
DMLOADER: Warning: The file Riff_Drums-01.wav couldn't be opened: No such
file or directory
. Try another path.
DMLOADER: Warning: The file Audiopath_AllCh.aud couldn't be opened: No such
file or directory
. Try another path.
DMLOADER: Warning: The file Segment1.sgt couldn't be opened: No such file
or directory
. Try another path.
DMLOADER: Warning: The file Riff_Bass-01.wav couldn't be opened: No such
file or directory
. Try another path.
DMLOADER: Load failure. While attempting to load the object
DMLOADER: [file C:\Documents and Settings\Tomas\My
Documents\DMUSProducer\Test1\Runtimefiles\TestScript1.spt, name
TestScript1, type Microsoft.DirectMusicScript.1, guid
{CAFFF46E-F3D6-4AA1-BE06-FACAA7A17F0E}]
DMLOADER: the following referenced objects could not be loaded:
DMLOADER: [file Riff_Bass-01.wav, name Riff_Bass-01, type
Microsoft.DirectMusicSegment.1, guid {F7B4BDBE-4695-4320-9A9E-C4CF4785B8C0}]
Basically, all files that the script refers to cannot be loaded. They
cannot be found it seems, since they are found if I were to point out their
the directory using IDirectMusicLoader8::SetSearchDirectory (but since I
won't be able to rely on files, this is a no-no).
I don't understand why the loader cannot find the files. If I point out
them using the SetObject, the loader should be able to load them when
loading the script, right?
FYI, in Producer, the script is set to load all references and download all
segments when it's loaded.
I would be very grateful if somebody with more experience out there could
help me with this problem. It makes no sense to me :-(.
Best regards,
Tomas Elf
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