midimap.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

/* -*- tab-width: 8; c-basic-offset: 4 -*- */
/*
 * Wine MIDI mapper driver
 *
 * Copyright 	1999, 2000, 2001 Eric Pouech
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * TODO:
 *	notification has to be implemented
 *	IDF file loading
 */

#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "mmddk.h"
#include "winreg.h"
#include "wine/unicode.h"
#include "wine/debug.h"

/*
 * Here's how Windows stores the midiOut mapping information.
 *
 * Full form (in HKU) is:
 *
 * [Software\\Microsoft\\Windows\\CurrentVersion\\Multimedia\\MIDIMap] 988836060
 * "AutoScheme"=dword:00000000
 * "ConfigureCount"=dword:00000004
 * "CurrentInstrument"="Wine OSS midi"
 * "CurrentScheme"="epp"
 * "DriverList"=""
 * "UseScheme"=dword:00000000
 *
 * AutoScheme: 		?
 * CurrentInstrument: 	name of midiOut device to use when UseScheme is 0. Wine uses an extension
 *			of the form #n to link to n'th midiOut device of the system
 * CurrentScheme:	when UseScheme is non null, it's the scheme to use (see below)
 * DriverList:		?
 * UseScheme:		trigger for simple/complex mapping
 *
 * A scheme is defined (in HKLM) as:
 *
 * [System\\CurrentControlSet\\Control\\MediaProperties\\PrivateProperties\\Midi\\Schemes\\<nameScheme>]
 * <nameScheme>:	one key for each defined scheme (system wide)
 * under each one of these <nameScheme> keys, there's:
 * [...\\<nameScheme>\\<idxDevice>]
 * "Channels"="<bitMask>"
 * (the default value of this key also refers to the name of the device).
 *
 * this defines, for each midiOut device (identified by its index in <idxDevice>), which
 * channels have to be mapped onto it. The <bitMask> defines the channels (from 0 to 15)
 * will be mapped (mapping occurs for channel <ch> if bit <ch> is set in <bitMask>
 *
 * Further mapping information can also be defined in:
 * [System\\CurrentControlSet\\Control\\MediaProperties\\PrivateProperties\\Midi\\Ports\\<nameDevice>\\Instruments\\<idx>]
 * "Definition"="<.idf file>"
 * "FriendlyName"="#for .idx file#"
 * "Port"="<idxPort>"
 *
 * This last part isn't implemented (.idf file support).
 */

WINE_DEFAULT_DEBUG_CHANNEL(msacm);

typedef struct tagMIDIOUTPORT
{
    WCHAR		name[MAXPNAMELEN];
    int			loaded;
    HMIDIOUT		hMidi;
    unsigned short	uDevID;
    LPBYTE		lpbPatch;
    unsigned int	aChn[16];
} MIDIOUTPORT;

typedef	struct tagMIDIMAPDATA
{
    struct tagMIDIMAPDATA*	self;
    MIDIOUTPORT*	ChannelMap[16];
} MIDIMAPDATA;

static	MIDIOUTPORT*	midiOutPorts;
static  unsigned	numMidiOutPorts;

static	BOOL	MIDIMAP_IsBadData(MIDIMAPDATA* mm)
{
    if (!IsBadReadPtr(mm, sizeof(MIDIMAPDATA)) && mm->self == mm)
	return FALSE;
    TRACE("Bad midimap data (%p)\n", mm);
    return TRUE;
}

static BOOL	MIDIMAP_FindPort(const WCHAR* name, unsigned* dev)
{
    for (*dev = 0; *dev < numMidiOutPorts; (*dev)++)
    {
	TRACE("%s\n", wine_dbgstr_w(midiOutPorts[*dev].name));
	if (strcmpW(midiOutPorts[*dev].name, name) == 0)
	    return TRUE;
    }
    /* try the form #nnn */
    if (*name == '#' && isdigit(name[1]))
    {
        const WCHAR*  ptr = name + 1;
        *dev = 0;
        do 
        {
            *dev = *dev * 10 + *ptr - '0';
        } while (isdigit(*++ptr));
	if (*dev < numMidiOutPorts)
	    return TRUE;
    }
    return FALSE;
}

static BOOL	MIDIMAP_LoadSettingsDefault(MIDIMAPDATA* mom, const WCHAR* port)
{
    unsigned i, dev = 0;

    if (port != NULL && !MIDIMAP_FindPort(port, &dev))
    {
	ERR("Registry glitch: couldn't find midi out (%s)\n", wine_dbgstr_w(port));
	dev = 0;
    }

    /* this is necessary when no midi out ports are present */
    if (dev >= numMidiOutPorts)
	return FALSE;
    /* sets default */
    for (i = 0; i < 16; i++) mom->ChannelMap[i] = &midiOutPorts[dev];

    return TRUE;
}

static BOOL	MIDIMAP_LoadSettingsScheme(MIDIMAPDATA* mom, const WCHAR* scheme)
{
    HKEY	hSchemesKey, hKey, hPortKey;
    unsigned	i, idx, dev;
    WCHAR       buffer[256], port[256];
    DWORD	type, size, mask;

    for (i = 0; i < 16; i++)	mom->ChannelMap[i] = NULL;

    if (RegOpenKeyA(HKEY_LOCAL_MACHINE,
		    "System\\CurrentControlSet\\Control\\MediaProperties\\PrivateProperties\\Midi\\Schemes",
		    &hSchemesKey))
    {
	return FALSE;
    }
    if (RegOpenKeyW(hSchemesKey, scheme, &hKey))
    {
	RegCloseKey(hSchemesKey);
	return FALSE;
    }

    for (idx = 0; !RegEnumKeyW(hKey, idx, buffer, sizeof(buffer)); idx++)
    {
	if (RegOpenKeyW(hKey, buffer, &hPortKey)) continue;

	size = sizeof(port);
	if (RegQueryValueExW(hPortKey, NULL, 0, &type, (void*)port, &size)) continue;

	if (!MIDIMAP_FindPort(port, &dev)) continue;

	size = sizeof(mask);
	if (RegQueryValueExA(hPortKey, "Channels", 0, &type, (void*)&mask, &size))
	    continue;

	for (i = 0; i < 16; i++)
	{
	    if (mask & (1 << i))
	    {
		if (mom->ChannelMap[i])
		    ERR("Quirks in registry, channel %u is mapped twice\n", i);
		mom->ChannelMap[i] = &midiOutPorts[dev];
	    }
	}
    }

    RegCloseKey(hSchemesKey);
    RegCloseKey(hKey);

    return TRUE;
}

static BOOL	MIDIMAP_LoadSettings(MIDIMAPDATA* mom)
{
    HKEY 	hKey;
    BOOL	ret;

    if (RegOpenKeyA(HKEY_CURRENT_USER,
		    "Software\\Microsoft\\Windows\\CurrentVersion\\Multimedia\\MIDIMap", &hKey))
    {
	ret = MIDIMAP_LoadSettingsDefault(mom, NULL);
    }
    else
    {
	DWORD	type, size, out;
	WCHAR   buffer[256];

	ret = 2;
	size = sizeof(out);
	if (!RegQueryValueExA(hKey, "UseScheme", 0, &type, (void*)&out, &size) && out)
	{
            static const WCHAR cs[] = {'C','u','r','r','e','n','t','S','c','h','e','m','e',0};
	    size = sizeof(buffer);
	    if (!RegQueryValueExW(hKey, cs, 0, &type, (void*)buffer, &size))
	    {
		if (!(ret = MIDIMAP_LoadSettingsScheme(mom, buffer)))
		    ret = MIDIMAP_LoadSettingsDefault(mom, NULL);
	    }
	    else
	    {
		ERR("Wrong registry: UseScheme is active, but no CurrentScheme found\n");
	    }
	}
	if (ret == 2)
	{
            static const WCHAR ci[] = {'C','u','r','r','e','n','t','I','n','s','t','r','u','m','e','n','t',0};
	    size = sizeof(buffer);
	    if (!RegQueryValueExW(hKey, ci, 0, &type, (void*)buffer, &size) && *buffer)
	    {
		ret = MIDIMAP_LoadSettingsDefault(mom, buffer);
	    }
	    else
	    {
		ret = MIDIMAP_LoadSettingsDefault(mom, NULL);
	    }
	}
    }
    RegCloseKey(hKey);

    if (ret && TRACE_ON(msacm))
    {
	unsigned	i;

	for (i = 0; i < 16; i++)
	{
	    TRACE("chnMap[%2d] => %d\n",
		  i, mom->ChannelMap[i] ? mom->ChannelMap[i]->uDevID : -1);
	}
    }
    return ret;
}

static	DWORD	modOpen(LPDWORD lpdwUser, LPMIDIOPENDESC lpDesc, DWORD dwFlags)
{
    MIDIMAPDATA*	mom = HeapAlloc(GetProcessHeap(), 0, sizeof(MIDIMAPDATA));

    TRACE("(%p %p %08lx)\n", lpdwUser, lpDesc, dwFlags);

    if (!mom) return MMSYSERR_NOMEM;

    if (MIDIMAP_LoadSettings(mom))
    {
	*lpdwUser = (DWORD)mom;
	mom->self = mom;

	return MMSYSERR_NOERROR;
    }
    HeapFree(GetProcessHeap(), 0, mom);
    return MIDIERR_INVALIDSETUP;
}

static	DWORD	modClose(MIDIMAPDATA* mom)
{