153 lines
3.5 KiB
C++
153 lines
3.5 KiB
C++
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// Copyright (c) 1998 Microsoft Corporation
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#include <windows.h>
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#include <mmsystem.h>
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#include <dsoundp.h>
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#include <regstr.h>
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#include "dmusicc.h"
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#include "..\dmusic\dmusicp.h"
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#include "dmusic32.h"
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// @globalv Registry location of legacy driver port definitions
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const char cszPortsRoot[] = REGSTR_PATH_PRIVATEPROPERTIES "\\Midi\\Ports";
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// @mfunc:(INTERNAL) Update the port list with legacy devices enumerated via
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// the WinMM MIDI API.
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//
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// @rdesc Returns one of the following:
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//
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// @flag S_OK | On success
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// @flag S_FALSE | If there were no devices found
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// @flag E_OUTOFMEMORY | If there was insufficient memory to build the port list
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//
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//
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HRESULT EnumLegacyDevices(
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LPVOID pInstance,
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PORTENUMCB cb)
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{
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MIDIOUTCAPS moc;
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MIDIINCAPS mic;
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int idxDev;
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int cDev;
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UINT cAdded;
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HRESULT hr;
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HKEY hkPortsRoot;
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DMUS_PORTCAPS dmpc;
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// Initialize caps with stuff that doesn't change
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//
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ZeroMemory(&dmpc, sizeof(dmpc));
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dmpc.dwSize = sizeof(dmpc);
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dmpc.dwMaxChannelGroups = 1;
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// Try to open the port registry key. We will continue even if this fails and use
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// non-persistent GUID's.
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//
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if (RegCreateKey(HKEY_LOCAL_MACHINE, cszPortsRoot, &hkPortsRoot))
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{
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hkPortsRoot = NULL;
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}
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cAdded = 0;
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// MIDI output devices
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//
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// Starts at -1 == MIDI mapper
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//
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cDev = (int)midiOutGetNumDevs();
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for (idxDev = -1; idxDev < cDev; ++idxDev)
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{
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if (midiOutGetDevCaps((UINT)idxDev, &moc, sizeof(moc)))
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{
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continue;
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}
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// NOTE: Since this DLL is only Win9x, we know that moc.szPname
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// is from midiOutGetDevCapsA
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//
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MultiByteToWideChar(
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CP_OEMCP,
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0,
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moc.szPname,
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-1,
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dmpc.wszDescription,
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sizeof(dmpc.wszDescription));
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dmpc.dwClass = DMUS_PC_OUTPUTCLASS;
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dmpc.dwType = DMUS_PORT_WINMM_DRIVER;
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dmpc.dwFlags = DMUS_PC_SHAREABLE;
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if (moc.wTechnology == MOD_MIDIPORT)
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{
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dmpc.dwFlags |= DMUS_PC_EXTERNAL;
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}
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hr = (*cb)(pInstance,
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dmpc,
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ptLegacyDevice,
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idxDev,
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-1,
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-1,
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hkPortsRoot);
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if (SUCCEEDED(hr))
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{
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++cAdded;
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}
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else if (hr == E_OUTOFMEMORY)
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{
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return hr;
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}
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}
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// MIDI input devices
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//
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// NOTE: Starts at 0, no input mapper
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//
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cDev = (int)midiInGetNumDevs();
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for (idxDev = 0; idxDev < cDev; ++idxDev)
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{
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if (midiInGetDevCaps((UINT)idxDev, &mic, sizeof(mic)))
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{
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continue;
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}
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MultiByteToWideChar(
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CP_OEMCP,
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0,
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mic.szPname,
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-1,
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dmpc.wszDescription,
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sizeof(dmpc.wszDescription));
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dmpc.dwClass = DMUS_PC_INPUTCLASS;
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dmpc.dwFlags = DMUS_PC_EXTERNAL;
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hr = (*cb)(pInstance,
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dmpc,
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ptLegacyDevice,
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idxDev,
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-1, // PinID -1 flags as legacy device
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-1,
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hkPortsRoot);
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if (SUCCEEDED(hr))
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{
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++cAdded;
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}
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else if (hr == E_OUTOFMEMORY)
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{
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return hr;
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}
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}
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if (hkPortsRoot)
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{
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RegCloseKey(hkPortsRoot);
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}
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return cAdded ? S_OK : S_FALSE;
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}
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