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reactos/dll/win32/mmdrv/midi.c

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/*
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS Multimedia
* FILE: lib/mmdrv/midi.c
* PURPOSE: Multimedia User Mode Driver
* PROGRAMMER: Andrew Greenwood
* UPDATE HISTORY:
* Jan 30, 2004: Imported into ReactOS tree
*/
#include "mmdrv.h"
#define NDEBUG
#include <debug.h>
#include "wave.h"
// MIDI device instance information
//
#define LOCAL_DATA_SIZE 20
typedef struct _LOCALMIDIHDR {
OVERLAPPED Ovl;
DWORD BytesReturned;
struct _LOCALMIDIHDR *lpNext;
BOOL Done;
PVOID pClient;
// MIDI_DD_INPUT_DATA MidiData;
BYTE ExtraData[LOCAL_DATA_SIZE - sizeof(ULONG)];
} LOCALMIDIHDR, *PLOCALMIDIHDR;
#define LOCAL_MIDI_BUFFERS 8
typedef struct {
BOOL fMidiInStarted;
DWORD dwMsg;
DWORD dwCurData;
BYTE status;
BOOLEAN fSysex;
BOOLEAN Bad;
BYTE bBytesLeft;
BYTE bBytePos;
DWORD dwCurTime;
DWORD dwMsgTime;
PLOCALMIDIHDR DeviceQueue;
LOCALMIDIHDR
Bufs[LOCAL_MIDI_BUFFERS];
} LOCALMIDIDATA, *PLOCALMIDIDATA;
typedef struct tag_MIDIALLOC {
struct tag_MIDIALLOC *Next; // Chain of devices
UINT DeviceNumber; // Number of device
UINT DeviceType; // MidiInput or MidiOutput
DWORD dwCallback; // client's callback
DWORD dwInstance; // client's instance data
HMIDI hMidi; // handle for stream
HANDLE DeviceHandle; // Midi device handle
LPMIDIHDR lpMIQueue; // Buffers sent to device
// This is only required so that
// CLOSE knows when things have
// really finished.
// notify. This is only accessed
// on the device thread and its
// apcs so does not need any
// synchronized access.
HANDLE Event; // Event for driver synchronization
// and notification of auxiliary
// task operation completion.
// MIDITHREADFUNCTION AuxFunction; // Function for thread to perform
union {
LPMIDIHDR pHdr; // Buffer to pass in aux task
ULONG State; // State to set
struct {
ULONG Function; // IOCTL to use
PBYTE pData; // Data to set or get
ULONG DataLen; // Length of data
} GetSetData;
} AuxParam;
// 0 means terminate task.
HANDLE ThreadHandle; // Handle for termination ONLY
HANDLE AuxEvent1; // Aux thread waits on this
HANDLE AuxEvent2; // Aux thread caller waits on this
DWORD AuxReturnCode; // Return code from Aux task
DWORD dwFlags; // Open flags
PLOCALMIDIDATA Mid; // Extra midi input structures
int l; // Helper global for modMidiLength
} MIDIALLOC, *PMIDIALLOC;
PMIDIALLOC MidiHandleList; // Our chain of wave handles
static DWORD OpenMidiDevice(UINT DeviceType, DWORD ID, DWORD User, DWORD Param1, DWORD Param2)
{
PMIDIALLOC pClient = NULL;
MMRESULT Result = MMSYSERR_NOERROR;
// Check ID?
DPRINT("OpenMidiDevice()\n");
switch(DeviceType)
{
case MidiOutDevice :
pClient = (PMIDIALLOC) HeapAlloc(Heap, 0, sizeof(MIDIALLOC));
if ( pClient ) memset(pClient, 0, sizeof(MIDIALLOC));
break;
case MidiInDevice :
pClient = (PMIDIALLOC) HeapAlloc(Heap, 0, sizeof(MIDIALLOC) + sizeof(LOCALMIDIDATA));
if ( pClient ) memset(pClient, 0, sizeof(MIDIALLOC) + sizeof(LOCALMIDIDATA));
break;
};
if ( !pClient )
return MMSYSERR_NOMEM;
if (DeviceType == MidiInDevice)
{
int i;
pClient->Mid = (PLOCALMIDIDATA)(pClient + 1);
for (i = 0 ;i < LOCAL_MIDI_BUFFERS ; i++)
{
pClient->Mid->Bufs[i].pClient = pClient;
}
}
pClient->DeviceType = DeviceType;
pClient->dwCallback = ((LPMIDIOPENDESC)Param1)->dwCallback;
pClient->dwInstance = ((LPMIDIOPENDESC)Param1)->dwInstance;
pClient->hMidi = ((LPMIDIOPENDESC)Param1)->hMidi;
pClient->dwFlags = Param2;
Result = OpenDevice(DeviceType, ID, &pClient->DeviceHandle, (GENERIC_READ | GENERIC_WRITE));
if ( Result != MMSYSERR_NOERROR )
{
// cleanup
return Result;
}
pClient->Event = CreateEvent(NULL, FALSE, FALSE, NULL);
if ( !pClient->Event )
{
// cleanup
return MMSYSERR_NOMEM;
}
if (DeviceType == MidiInDevice)
{
pClient->AuxEvent1 = CreateEvent(NULL, FALSE, FALSE, NULL);
if (pClient->AuxEvent1 == NULL)
{
// cleanup
return MMSYSERR_NOMEM;
}
pClient->AuxEvent2 = CreateEvent(NULL, FALSE, FALSE, NULL);
if (pClient->AuxEvent2 == NULL)
{
// cleanup
return MMSYSERR_NOMEM;
}
// TaskCreate
WaitForSingleObject(pClient->AuxEvent2, INFINITE);
}
PMIDIALLOC *pUserHandle;
pUserHandle = (PMIDIALLOC*) User;
*pUserHandle = pClient;
// callback
return MMSYSERR_NOERROR;
}
static DWORD WriteMidi(PBYTE pData, ULONG Length, PMIDIALLOC pClient)
{
DWORD BytesReturned;
DPRINT("IOCTL_MIDI_PLAY == %d [%x]\n", IOCTL_MIDI_PLAY, IOCTL_MIDI_PLAY);
if ( !DeviceIoControl(pClient->DeviceHandle, IOCTL_MIDI_PLAY, (PVOID)pData,
Length, NULL, 0, &BytesReturned, NULL))
return TranslateStatus();
return MMSYSERR_NOERROR;
}
static int GetMidiLength(PMIDIALLOC pClient, BYTE b)
{
if (b >= 0xF8)
{
// Realtime message - leave running status
return 1; // Write one byte
}
switch (b)
{
case 0xF0: case 0xF4: case 0xF5: case 0xF6: case 0xF7:
pClient->l = 1;
return pClient->l;
case 0xF1: case 0xF3:
pClient->l = 2;
return pClient->l;
case 0xF2:
pClient->l = 3;
return pClient->l;
}
switch (b & 0xF0)
{
case 0x80: case 0x90: case 0xA0: case 0xB0: case 0xE0:
pClient->l = 3;
return pClient->l;
case 0xC0: case 0xD0:
pClient->l = 2;
return pClient->l;
}
return (pClient->l - 1); // uses previous value if data byte (running status)
}
/* ----------------------------------------------------------------------------
Exported functions
----------------------------------------------------------------------------- */
APIENTRY DWORD midMessage(DWORD dwId, DWORD dwMessage, DWORD dwUser, DWORD dwParam1, DWORD dwParam2)
{
DPRINT("midMessage\n");
return MMSYSERR_NOERROR;
switch (dwMessage) {
case MIDM_GETNUMDEVS:
DPRINT("MIDM_GETNUMDEVS");
return GetDeviceCount(MidiInDevice);
case MIDM_GETDEVCAPS:
DPRINT("MIDM_GETDEVCAPS");
return GetDeviceCapabilities(dwId, MidiInDevice, (LPBYTE)dwParam1, (DWORD)dwParam2);
case MIDM_OPEN:
DPRINT("MIDM_OPEN");
return MMSYSERR_NOERROR;
case MIDM_CLOSE:
DPRINT("MIDM_CLOSE");
return MMSYSERR_NOERROR;
case MIDM_ADDBUFFER:
DPRINT("MIDM_ADDBUFFER");
return MMSYSERR_NOERROR;
case MIDM_STOP:
DPRINT("MIDM_PAUSE");
return MMSYSERR_NOERROR;
case MIDM_START:
DPRINT("MIDM_RESTART");
return MMSYSERR_NOERROR;
case MIDM_RESET:
DPRINT("MIDM_RESET");
return MMSYSERR_NOERROR;
default:
return MMSYSERR_NOTSUPPORTED;
}
// the function should never get to this point
//FIXME: Would it be wise to assert here?
return MMSYSERR_NOTSUPPORTED;
}
APIENTRY DWORD modMessage(DWORD ID, DWORD Message, DWORD User, DWORD Param1, DWORD Param2)
{
DPRINT("modMessage\n");
switch(Message)
{
case MODM_GETNUMDEVS:
DPRINT("MODM_GETNUMDEVS == %d\n", (int)GetDeviceCount(MidiOutDevice));
return GetDeviceCount(MidiOutDevice);
case MODM_GETDEVCAPS:
DPRINT("MODM_GETDEVCAPS");
return GetDeviceCapabilities(ID, MidiOutDevice, (LPBYTE)Param1, (DWORD)Param2);
case MODM_OPEN :
return OpenMidiDevice(MidiOutDevice, ID, User, Param1, Param2);
case MODM_CLOSE:
DPRINT("MODM_CLOSE");
return MMSYSERR_NOTSUPPORTED;
case MODM_DATA:
DPRINT("MODM_DATA");
int i;
BYTE b[4];
for (i = 0; i < 4; i ++) {
b[i] = (BYTE)(Param1 % 256);
Param1 /= 256;
}
return WriteMidi(b, GetMidiLength((PMIDIALLOC)User, b[0]),
(PMIDIALLOC)User);
case MODM_LONGDATA:
DPRINT("MODM_LONGDATA");
return MMSYSERR_NOTSUPPORTED;
case MODM_RESET:
DPRINT("MODM_RESET");
return MMSYSERR_NOTSUPPORTED;
case MODM_SETVOLUME:
DPRINT("MODM_SETVOLUME");
return MMSYSERR_NOTSUPPORTED;
case MODM_GETVOLUME:
DPRINT("MODM_GETVOLUME");
return MMSYSERR_NOTSUPPORTED;
case MODM_CACHEPATCHES:
DPRINT("MODM_CACHEPATCHES");
return MMSYSERR_NOTSUPPORTED;
case MODM_CACHEDRUMPATCHES:
DPRINT("MODM_CACHEDRUMPATCHES");
return MMSYSERR_NOTSUPPORTED;
};
return MMSYSERR_NOTSUPPORTED;
}
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