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raze/polymer/eduke32/source/mpu401.c

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//-------------------------------------------------------------------------
/*
Copyright (C) 2010 EDuke32 developers and contributors
This file is part of EDuke32.
EDuke32 is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License version 2
as published by the Free Software Foundation.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
//-------------------------------------------------------------------------
/**********************************************************************
module: MPU401.C
author: James R. Dose
date: January 1, 1994
Low level routines to support sending of MIDI data to MPU401
compatible MIDI interfaces.
(c) Copyright 1994 James R. Dose. All Rights Reserved.
**********************************************************************/
#include "mpu401.h"
#include "compat.h"
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <mmsystem.h>
static HMIDISTRM hmido = (HMIDISTRM)-1;
static MIDIOUTCAPS midicaps;
static DWORD mididevice = -1;
typedef struct
{
int32_t time;
int32_t stream;
int32_t event;
}
MIDIEVENTHEAD;
#define PAD(x) ((((x)+3)&(~3)))
#define BUFFERLEN (32*4*4)
#define NUMBUFFERS 6
static char eventbuf[NUMBUFFERS][BUFFERLEN];
static int32_t eventcnt[NUMBUFFERS];
static MIDIHDR bufferheaders[NUMBUFFERS];
int32_t _MPU_CurrentBuffer = 0;
int32_t _MPU_BuffersWaiting = 0;
extern uint32_t _MIDI_GlobalPositionInTicks;
uint32_t _MPU_LastEvent=0;
#define MIDI_NOTE_OFF 0x80
#define MIDI_NOTE_ON 0x90
#define MIDI_POLY_AFTER_TCH 0xA0
#define MIDI_CONTROL_CHANGE 0xB0
#define MIDI_PROGRAM_CHANGE 0xC0
#define MIDI_AFTER_TOUCH 0xD0
#define MIDI_PITCH_BEND 0xE0
#define MIDI_META_EVENT 0xFF
#define MIDI_END_OF_TRACK 0x2F
#define MIDI_TEMPO_CHANGE 0x51
#define MIDI_MONO_MODE_ON 0x7E
#define MIDI_ALL_NOTES_OFF 0x7B
/**********************************************************************
Memory locked functions:
**********************************************************************/
void MPU_FinishBuffer(int32_t buffer)
{
if (!eventcnt[buffer]) return;
ZeroMemory(&bufferheaders[buffer], sizeof(MIDIHDR));
bufferheaders[buffer].lpData = eventbuf[buffer];
bufferheaders[buffer].dwBufferLength =
bufferheaders[buffer].dwBytesRecorded = eventcnt[buffer];
midiOutPrepareHeader((HMIDIOUT)hmido, &bufferheaders[buffer], sizeof(MIDIHDR));
midiStreamOut(hmido, &bufferheaders[buffer], sizeof(MIDIHDR));
// printf("Sending %d bytes (buffer %d)\n",eventcnt[buffer],buffer);
_MPU_BuffersWaiting++;
}
void MPU_BeginPlayback(void)
{
_MPU_LastEvent = _MIDI_GlobalPositionInTicks;
if (hmido != (HMIDISTRM)-1) midiStreamRestart(hmido);
}
void MPU_Pause(void)
{
if (hmido != (HMIDISTRM)-1) midiStreamPause(hmido);
}
void MPU_Unpause(void)
{
if (hmido != (HMIDISTRM)-1) midiStreamRestart(hmido);
}
void CALLBACK MPU_MIDICallback(HMIDIOUT handle, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2)
{
int32_t i;
UNREFERENCED_PARAMETER(dwInstance);
UNREFERENCED_PARAMETER(dwParam2);
switch (uMsg)
{
case MOM_DONE:
midiOutUnprepareHeader((HMIDIOUT)handle, (MIDIHDR*)dwParam1, sizeof(MIDIHDR));
for (i=0; i<NUMBUFFERS; i++)
{
if (dwParam1 == (uint32_t)&bufferheaders[i])
{
eventcnt[i] = 0; // marks the buffer as free
// printf("Finished buffer %d\n",i);
_MPU_BuffersWaiting--;
break;
}
}
return;
default: return;
}
}
/*---------------------------------------------------------------------
Function: MPU_SendMidi
Queues a MIDI message to the music device.
---------------------------------------------------------------------*/
int32_t MPU_GetNextBuffer(void)
{
int32_t i;
for (i=0; i<NUMBUFFERS; i++)
{
if (eventcnt[i] == 0) return i;
}
return -1;
}
void MPU_SendMidi(char *data, int32_t count)
{
char *p;
int32_t padded, nextbuffer;
static int32_t masks[3] = { 0x000000ffl, 0x0000ffffl, 0x00ffffffl };
if (count <= 0) return;
if (count <= 3)
{
if (eventcnt[_MPU_CurrentBuffer] + 12 > BUFFERLEN)
{
// buffer over-full
nextbuffer = MPU_GetNextBuffer();
if (nextbuffer < 0)
{
// printf("All buffers full!\n");
return;
}
MPU_FinishBuffer(_MPU_CurrentBuffer);
_MPU_CurrentBuffer = nextbuffer;
}
p = eventbuf[_MPU_CurrentBuffer] + eventcnt[_MPU_CurrentBuffer];
((int32_t*)p)[0] = _MIDI_GlobalPositionInTicks - _MPU_LastEvent;
((int32_t*)p)[1] = 0;
((int32_t*)p)[2] = (MEVT_SHORTMSG << 24) | ((*((int32_t*)data)) & masks[count-1]);
eventcnt[_MPU_CurrentBuffer] += 12;
}
else
{
padded = PAD(count);
if (eventcnt[_MPU_CurrentBuffer] + 12 + padded > BUFFERLEN)
{
// buffer over-full
nextbuffer = MPU_GetNextBuffer();
if (nextbuffer < 0)
{
// printf("All buffers full!\n");
return;
}
MPU_FinishBuffer(_MPU_CurrentBuffer);
_MPU_CurrentBuffer = nextbuffer;
}
p = eventbuf[_MPU_CurrentBuffer] + eventcnt[_MPU_CurrentBuffer];
((int32_t*)p)[0] = _MIDI_GlobalPositionInTicks - _MPU_LastEvent;
((int32_t*)p)[1] = 0;
((int32_t*)p)[2] = (MEVT_LONGMSG<<24) | (count & 0xffffffl);
p+=12; eventcnt[_MPU_CurrentBuffer] += 12;
for (; count>0; count--, padded--, eventcnt[_MPU_CurrentBuffer]++)
*(p++) = *(data++);
for (; padded>0; padded--, eventcnt[_MPU_CurrentBuffer]++)
*(p++) = 0;
}
_MPU_LastEvent = _MIDI_GlobalPositionInTicks;
}
/*---------------------------------------------------------------------
Function: MPU_SendMidiImmediate
Sends a MIDI message immediately to the the music device.
---------------------------------------------------------------------*/
void MPU_SendMidiImmediate(char *data, int32_t count)
{
MIDIHDR mhdr;
static int32_t masks[3] = { 0x00ffffffl, 0x0000ffffl, 0x000000ffl };
if (!count) return;
if (count<=3) midiOutShortMsg((HMIDIOUT)hmido, (*((int32_t*)data)) & masks[count-1]);
else
{
ZeroMemory(&mhdr, sizeof(mhdr));
mhdr.lpData = data;
mhdr.dwBufferLength = count;
midiOutPrepareHeader((HMIDIOUT)hmido, &mhdr, sizeof(MIDIHDR));
midiOutLongMsg((HMIDIOUT)hmido, &mhdr, sizeof(MIDIHDR));
while (!(mhdr.dwFlags & MHDR_DONE)) ;
midiOutUnprepareHeader((HMIDIOUT)hmido, &mhdr, sizeof(MIDIHDR));
}
}
/*---------------------------------------------------------------------
Function: MPU_Reset
Resets the MPU401 card.
---------------------------------------------------------------------*/
int32_t MPU_Reset
(
void
)
{
midiStreamStop(hmido);
midiStreamClose(hmido);
return(MPU_Ok);
}
/*---------------------------------------------------------------------
Function: MPU_Init
Detects and initializes the MPU401 card.
---------------------------------------------------------------------*/
int32_t MPU_Init
(
int32_t addr
)
{
int32_t i;
for (i=0; i<NUMBUFFERS; i++) eventcnt[i]=0;
mididevice = addr;
if (midiOutGetDevCaps(mididevice, &midicaps, sizeof(MIDIOUTCAPS)) != MMSYSERR_NOERROR) return MPU_Error;
if (midiStreamOpen(&hmido,(LPUINT)&mididevice,1,(DWORD)MPU_MIDICallback,0L,CALLBACK_FUNCTION) != MMSYSERR_NOERROR) return(MPU_Error);
return(MPU_Ok);
}
/*---------------------------------------------------------------------
Function: MPU_NoteOff
Sends a full MIDI note off event out to the music device.
---------------------------------------------------------------------*/
void MPU_NoteOff
(
int32_t channel,
int32_t key,
int32_t velocity
)
{
char msg[3];
msg[0] = (MIDI_NOTE_OFF | channel);
msg[1] = (key);
msg[2] = (velocity);
MPU_SendMidi(msg, 3);
}
/*---------------------------------------------------------------------
Function: MPU_NoteOn
Sends a full MIDI note on event out to the music device.
---------------------------------------------------------------------*/
void MPU_NoteOn
(
int32_t channel,
int32_t key,
int32_t velocity
)
{
char msg[3];
msg[0] = (MIDI_NOTE_ON | channel);
msg[1] = (key);
msg[2] = (velocity);
MPU_SendMidi(msg, 3);
}
/*---------------------------------------------------------------------
Function: MPU_PolyAftertouch
Sends a full MIDI polyphonic aftertouch event out to the music device.
---------------------------------------------------------------------*/
void MPU_PolyAftertouch
(
int32_t channel,
int32_t key,
int32_t pressure
)
{
char msg[3];
msg[0] = (MIDI_POLY_AFTER_TCH | channel);
msg[1] = (key);
msg[2] = (pressure);
MPU_SendMidi(msg, 3);
}
/*---------------------------------------------------------------------
Function: MPU_ControlChange
Sends a full MIDI control change event out to the music device.
---------------------------------------------------------------------*/
void MPU_ControlChange
(
int32_t channel,
int32_t number,
int32_t value
)
{
char msg[3];
msg[0] = (MIDI_CONTROL_CHANGE | channel);
msg[1] = (number);
msg[2] = (value);
MPU_SendMidi(msg, 3);
}
/*---------------------------------------------------------------------
Function: MPU_ProgramChange
Sends a full MIDI program change event out to the music device.
---------------------------------------------------------------------*/
void MPU_ProgramChange
(
int32_t channel,
int32_t program
)
{
char msg[2];
msg[0] = (MIDI_PROGRAM_CHANGE | channel);
msg[1] = (program);
MPU_SendMidi(msg, 2);
}
/*---------------------------------------------------------------------
Function: MPU_ChannelAftertouch
Sends a full MIDI channel aftertouch event out to the music device.
---------------------------------------------------------------------*/
void MPU_ChannelAftertouch
(
int32_t channel,
int32_t pressure
)
{
char msg[2];
msg[0] = (MIDI_AFTER_TOUCH | channel);
msg[1] = (pressure);
MPU_SendMidi(msg, 2);
}
/*---------------------------------------------------------------------
Function: MPU_PitchBend
Sends a full MIDI pitch bend event out to the music device.
---------------------------------------------------------------------*/
void MPU_PitchBend
(
int32_t channel,
int32_t lsb,
int32_t msb
)
{
char msg[3];
msg[0] = (MIDI_PITCH_BEND | channel);
msg[1] = (lsb);
msg[2] = (msb);
MPU_SendMidi(msg, 3);
}
void MPU_SetTempo(int32_t tempo)
{
MIDIPROPTEMPO prop;
prop.cbStruct = sizeof(MIDIPROPTEMPO);
prop.dwTempo = 60000000l/tempo;
midiStreamProperty(hmido, (LPBYTE)&prop, MIDIPROP_SET|MIDIPROP_TEMPO);
}
void MPU_SetDivision(int32_t division)
{
MIDIPROPTIMEDIV prop;
prop.cbStruct = sizeof(MIDIPROPTIMEDIV);
prop.dwTimeDiv = division;
midiStreamProperty(hmido, (LPBYTE)&prop, MIDIPROP_SET|MIDIPROP_TIMEDIV);
}
void MPU_SetVolume(int32_t volume)
{
/*
HMIXER hmixer;
int32_t mixerid;
MIXERCONTROLDETAILS mxcd;
MIXERCONTROLDETAILS_UNSIGNED mxcdu;
MMRESULT mme;
if (mididevice < 0) return;
mme = mixerOpen(&hmixer, mididevice, 0,0, MIXER_OBJECTF_MIDIOUT);
if (mme) {
puts("Failed opening mixer");
return;
}
mixerGetID(hmixer, &mixerid, MIXER_OBJECTF_HMIXER);
printf("mixerid=%d\n",mixerid);
ZeroMemory(&mxcd,sizeof(mxcd));
mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
mxcd.dwControlID = MIXERCONTROL_CONTROLTYPE_VOLUME;
mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);
mxcd.paDetails = (LPVOID)&mxcdu;
mxcdu.dwValue = (volume << 8) & 0xffff;
printf("set %d\n",mixerSetControlDetails((HMIXEROBJ)mididevice, &mxcd,
MIXER_OBJECTF_MIDIOUT|MIXER_SETCONTROLDETAILSF_VALUE));
mixerClose(hmixer);
*/
UNREFERENCED_PARAMETER(volume);
}
int32_t MPU_GetVolume(void)
{
// if (mididevice < 0) return 0;
return 0;
}
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