Proxy dll relative paths tip
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When using the proxy dll it is useful to edit dxwnd.dxw and change the path fields from absolute to relative.
E.g. change this:
path0=C:\game\game.exe
to this:
path0=.\game.exe
This makes the proxy fully portable.
Side note:
Virtual CD audio does not seem to work when using a proxy dll. Copying "dxwplay.dll, libogg.dll, libvorbis.dll, libvorbisfile.dll" to the game folder did not help either.
I think I posted some code here somewhere that makes the proxy portable by removing the path completely, not sure if it's included with DxWnd though
I'm not even sure that a path0 field is necessary in proxy mode, the dxwnd.dll is loaded by the proxy library (es. ddraw.dll) and may not need an executable name at all. But I'm not sure, let me check ...
I see that the "path0" field is not needed for the proxy at all. (Neither is "startfolder0" or "launchpath0" I assume.)
Problem is that when you install a proxy from the Dxwnd GUI that field gets copied to the dxwnd.dxw file that stores the all the game specific settings. So possibly one would need to edit the source at “proxy\init.cpp” so that the path0 field gets omitted or just replaced by ".\" or something...
As for the Virtual CD audio not working with a proxy setup it might be enough to build a small winmm.dll proxy. And modify the proxy installation to also copy "winmm.dll, dxwplay.dll, libogg.dll, libvorbis.dll, libvorbisfile.dll" to the game folder. Maybe add a check in there to see if the user has enabled the Virtual CD audio flag before copying those extra files?
I think you're right: the proxy mode is enabled by the fact that the game links the fake system dll (either ddraw.dll, dinput.dll, .... Beware: NEVER put more than one proxy dll in the game folder or the trick won't work!) who automatically loads dxwnd.dll, so there's no check for task names.
Furthermore, when dxwnd.dll is loaded the game is started already, so there's no possible use for startfolder or launchpath. All these fields could be cleared in the dxwnd.dxw file generation, but they make no harm (and could be useful to re-import the configuration back in DxWnd.exe, so why do that?
About Virtual CD audio, a small (ehm.. small? try counting the number of function calls in there ...) winmm.dll proxy is the original solution, also existing in GOG games, but it could bring a problem: winmm.dll doesn't hold only mci sound calls, it also have system calls for movie, joystick, timing and other stuff that DxWnd could be interested in hooking. I fear that a winmm.dll proxy could interfere with that. I should try to be sure.
Right you are. The proxy does not care about those path fields at all so this is really a completely moot point.
As for the winmm.dll proxy I see what you mean now. The number of calls in there is quite daunting. I was looking at the already existing stand alone winmm wrappers and it seems that they have a lot of issues. Mainly they are no where near as good as what is included with Dxwnd.
Here is a winmm.def listing from the stand alone winmm-ogg wrapper:
LIBRARY winmm.dll EXPORTS auxGetVolume = fake_auxGetVolume auxSetVolume = fake_auxSetVolume auxGetDevCapsA = fake_auxGetDevCapsA auxGetNumDevs = fake_auxGetNumDevs mciSendCommandA = fake_mciSendCommandA mciSendStringA = fake_mciSendStringA auxGetDevCapsW = fake_auxGetDevCapsW auxOutMessage = fake_auxOutMessage CloseDriver = fake_CloseDriver DefDriverProc = fake_DefDriverProc DriverCallback = fake_DriverCallback DrvGetModuleHandle = fake_DrvGetModuleHandle GetDriverModuleHandle = fake_GetDriverModuleHandle joyConfigChanged = fake_joyConfigChanged joyGetDevCapsA = fake_joyGetDevCapsA joyGetDevCapsW = fake_joyGetDevCapsW joyGetNumDevs = fake_joyGetNumDevs joyGetPos = fake_joyGetPos joyGetPosEx = fake_joyGetPosEx joyGetThreshold = fake_joyGetThreshold joyReleaseCapture = fake_joyReleaseCapture joySetCapture = fake_joySetCapture joySetThreshold = fake_joySetThreshold mciExecute = fake_mciExecute mciFreeCommandResource = fake_mciFreeCommandResource mciGetCreatorTask = fake_mciGetCreatorTask mciGetDeviceIDA = fake_mciGetDeviceIDA mciGetDeviceIDFromElementIDA = fake_mciGetDeviceIDFromElementIDA mciGetDeviceIDFromElementIDW = fake_mciGetDeviceIDFromElementIDW mciGetDeviceIDW = fake_mciGetDeviceIDW mciGetErrorStringA = fake_mciGetErrorStringA mciGetErrorStringW = fake_mciGetErrorStringW mciGetYieldProc = fake_mciGetYieldProc mciLoadCommandResource = fake_mciLoadCommandResource mciSendCommandW = fake_mciSendCommandW mciSendStringW = fake_mciSendStringW mciSetYieldProc = fake_mciSetYieldProc midiConnect = fake_midiConnect midiDisconnect = fake_midiDisconnect midiInAddBuffer = fake_midiInAddBuffer midiInClose = fake_midiInClose midiInGetDevCapsA = fake_midiInGetDevCapsA midiInGetDevCapsW = fake_midiInGetDevCapsW midiInGetErrorTextA = fake_midiInGetErrorTextA midiInGetErrorTextW = fake_midiInGetErrorTextW midiInGetID = fake_midiInGetID midiInGetNumDevs = fake_midiInGetNumDevs midiInMessage = fake_midiInMessage midiInOpen = fake_midiInOpen midiInPrepareHeader = fake_midiInPrepareHeader midiInReset = fake_midiInReset midiInStart = fake_midiInStart midiInStop = fake_midiInStop midiInUnprepareHeader = fake_midiInUnprepareHeader midiOutCacheDrumPatches = fake_midiOutCacheDrumPatches midiOutCachePatches = fake_midiOutCachePatches midiOutClose = fake_midiOutClose midiOutGetDevCapsA = fake_midiOutGetDevCapsA midiOutGetDevCapsW = fake_midiOutGetDevCapsW midiOutGetErrorTextA = fake_midiOutGetErrorTextA midiOutGetErrorTextW = fake_midiOutGetErrorTextW midiOutGetID = fake_midiOutGetID midiOutGetNumDevs = fake_midiOutGetNumDevs midiOutGetVolume = fake_midiOutGetVolume midiOutLongMsg = fake_midiOutLongMsg midiOutMessage = fake_midiOutMessage midiOutOpen = fake_midiOutOpen midiOutPrepareHeader = fake_midiOutPrepareHeader midiOutReset = fake_midiOutReset midiOutSetVolume = fake_midiOutSetVolume midiOutShortMsg = fake_midiOutShortMsg midiOutUnprepareHeader = fake_midiOutUnprepareHeader midiStreamClose = fake_midiStreamClose midiStreamOpen = fake_midiStreamOpen midiStreamOut = fake_midiStreamOut midiStreamPause = fake_midiStreamPause midiStreamPosition = fake_midiStreamPosition midiStreamProperty = fake_midiStreamProperty midiStreamRestart = fake_midiStreamRestart midiStreamStop = fake_midiStreamStop mixerClose = fake_mixerClose mixerGetControlDetailsA = fake_mixerGetControlDetailsA mixerGetControlDetailsW = fake_mixerGetControlDetailsW mixerGetDevCapsA = fake_mixerGetDevCapsA mixerGetDevCapsW = fake_mixerGetDevCapsW mixerGetID = fake_mixerGetID mixerGetLineControlsA = fake_mixerGetLineControlsA mixerGetLineControlsW = fake_mixerGetLineControlsW mixerGetLineInfoA = fake_mixerGetLineInfoA mixerGetLineInfoW = fake_mixerGetLineInfoW mixerGetNumDevs = fake_mixerGetNumDevs mixerMessage = fake_mixerMessage mixerOpen = fake_mixerOpen mixerSetControlDetails = fake_mixerSetControlDetails mmGetCurrentTask = fake_mmGetCurrentTask mmTaskBlock = fake_mmTaskBlock mmTaskCreate = fake_mmTaskCreate mmTaskSignal = fake_mmTaskSignal mmTaskYield = fake_mmTaskYield mmioAdvance = fake_mmioAdvance mmioAscend = fake_mmioAscend mmioClose = fake_mmioClose mmioCreateChunk = fake_mmioCreateChunk mmioDescend = fake_mmioDescend mmioFlush = fake_mmioFlush mmioGetInfo = fake_mmioGetInfo mmioInstallIOProcA = fake_mmioInstallIOProcA mmioInstallIOProcW = fake_mmioInstallIOProcW mmioOpenA = fake_mmioOpenA mmioOpenW = fake_mmioOpenW mmioRead = fake_mmioRead mmioRenameA = fake_mmioRenameA mmioRenameW = fake_mmioRenameW mmioSeek = fake_mmioSeek mmioSendMessage = fake_mmioSendMessage mmioSetBuffer = fake_mmioSetBuffer mmioSetInfo = fake_mmioSetInfo mmioStringToFOURCCA = fake_mmioStringToFOURCCA mmioStringToFOURCCW = fake_mmioStringToFOURCCW mmioWrite = fake_mmioWrite mmsystemGetVersion = fake_mmsystemGetVersion NotifyCallbackData = fake_NotifyCallbackData OpenDriver = fake_OpenDriver PlaySound = fake_PlaySound PlaySoundA = fake_PlaySoundA PlaySoundW = fake_PlaySoundW SendDriverMessage = fake_SendDriverMessage sndPlaySoundA = fake_sndPlaySoundA sndPlaySoundW = fake_sndPlaySoundW timeBeginPeriod = fake_timeBeginPeriod timeEndPeriod = fake_timeEndPeriod timeGetDevCaps = fake_timeGetDevCaps timeGetSystemTime = fake_timeGetSystemTime timeGetTime = fake_timeGetTime timeKillEvent = fake_timeKillEvent timeSetEvent = fake_timeSetEvent waveInAddBuffer = fake_waveInAddBuffer waveInClose = fake_waveInClose waveInGetDevCapsA = fake_waveInGetDevCapsA waveInGetDevCapsW = fake_waveInGetDevCapsW waveInGetErrorTextA = fake_waveInGetErrorTextA waveInGetErrorTextW = fake_waveInGetErrorTextW waveInGetID = fake_waveInGetID waveInGetNumDevs = fake_waveInGetNumDevs waveInGetPosition = fake_waveInGetPosition waveInMessage = fake_waveInMessage waveInOpen = fake_waveInOpen waveInPrepareHeader = fake_waveInPrepareHeader waveInReset = fake_waveInReset waveInStart = fake_waveInStart waveInStop = fake_waveInStop waveInUnprepareHeader = fake_waveInUnprepareHeader waveOutBreakLoop = fake_waveOutBreakLoop waveOutClose = fake_waveOutClose waveOutGetDevCapsA = fake_waveOutGetDevCapsA waveOutGetDevCapsW = fake_waveOutGetDevCapsW waveOutGetErrorTextA = fake_waveOutGetErrorTextA waveOutGetErrorTextW = fake_waveOutGetErrorTextW waveOutGetID = fake_waveOutGetID waveOutGetNumDevs = fake_waveOutGetNumDevs waveOutGetPitch = fake_waveOutGetPitch waveOutGetPlaybackRate = fake_waveOutGetPlaybackRate waveOutGetPosition = fake_waveOutGetPosition waveOutGetVolume = fake_waveOutGetVolume waveOutMessage = fake_waveOutMessage waveOutOpen = fake_waveOutOpen waveOutPause = fake_waveOutPause waveOutPrepareHeader = fake_waveOutPrepareHeader waveOutReset = fake_waveOutReset waveOutRestart = fake_waveOutRestart waveOutSetPitch = fake_waveOutSetPitch waveOutSetPlaybackRate = fake_waveOutSetPlaybackRate waveOutSetVolume = fake_waveOutSetVolume waveOutUnprepareHeader = fake_waveOutUnprepareHeader waveOutWrite = fake_waveOutWriteThe ones I saw until now were mainly designed having one specific game in mind: this is why they're not as good as DxWnd: each game uses a tiny bit of mci capabilities and there's no point in adding unnecessary stuff, both unused call wrappers or variations in the syntax. On the contrary, DWnd tries to be a one-fits-all software, so you have good chances that it could apply to untested games, and in any case you can always post here your "case" and wait for me to fix the code ;)
P.s. another weird idea I have in mind (but it's not at all a invention of mine) is to automate the proxy code generation: now that I learnt how to walk the dll PE structure, it should be easy to make a tool that outputs some C code with all function declarations and other stuff to build a generic proxy... this way the number of dll entries wouldn't frighten me no more.
Last edit: gho 2018-10-17
Wait just a minute here...
Now I got the Virtual CD audio playing just fine with the proxy setup.
Testing with the game Pandemonium!
All I did was install the ddraw proxy from the Dxwnd GUI making sure the sound tab had "virtual CD audio" enabled of course. Then I also manually copied the "dxwplay.dll", "libogg.dll", "libvorbis.dll" and "libvorbisfile.dll" to the game folder.
I swear I tried to do exactly the same thing several times before and the music did not play. And now it is suddenly working just fine.
Weird, but I'm rather used to weidness with proxy configurations. Anyway, there's a little trick to try getting more information about what's going wrong: the proxy command clears all the log flag when writing the dxwnd.dxw file, but after that you can copy the value from a dflagn field from within dxwnd.ini (picking one entry that has the logging you wish, of course) and paste that value in dxwnd.dxw (making sure that the left part remains "dflag0"). This way the proxed game will write its own dxwnd.log file.
Maybe I should add a small dialog to the procedure to select whether to keep or clear the log flags ...
Last edit: gho 2018-10-17