fmout.cc
/**************************************************************************
fmout.cc - class fmOut which handles the /dev/sequencer device
for fm synths
This file is part of LibKMid 0.9.5
Copyright (C) 1998,99,2000 Antonio Larrosa Jimenez
LibKMid's homepage : http://www.arrakis.es/~rlarrosa/libkmid.html
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
Send comments and bug fixes to Antonio Larrosa <larrosa@kde.org>
***************************************************************************/
#include "fmout.h"
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include "sndcard.h"
#include <sys/ioctl.h>
#include <errno.h>
#include <string.h>
#include <sys/param.h>
#include <stdlib.h>
#include <limits.h>
#include "midispec.h"
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
SEQ_USE_EXTBUF();
FMOut::FMOut( int d, int total )
{
seqfd = -1;
devicetype = KMID_FM;
device = d;
_ok = 1;
// Put opl=3 for opl/3 (better quality/ 6 voices)
// or opl=2 for fm output (less quality/ 18 voices, which is better imho) :
opl = 2;
// But be aware that opl=3 is not intended to be fully supported by now
nvoices = total;
vm = new VoiceManager (nvoices);
}
FMOut::~FMOut()
{
closeDev();
delete vm;
if (deleteFMPatchesDirectory)
{
free((char *)FMPatchesDirectory);
deleteFMPatchesDirectory = 0;
FMPatchesDirectory="/etc";
}
}
void FMOut::openDev (int sqfd)
{
#ifdef HAVE_OSS_SUPPORT
_ok=1;
seqfd = sqfd;
//vm->clearLists();
if ( seqfd == -1 )
{
printfdebug("ERROR: Could not open /dev/sequencer\n");
return;
}
loadFMPatches();
#endif
}
void FMOut::closeDev (void)
{
if (!ok()) return;
vm->clearLists();
//if (seqfd>=0) close(seqfd);
seqfd = -1;
}
void FMOut::initDev (void)
{
#ifdef HAVE_OSS_SUPPORT
int chn;
if (!ok()) return;
uchar gm_reset[5]={0x7e, 0x7f, 0x09, 0x01, 0xf7};
sysex(gm_reset, sizeof(gm_reset));
for (chn=0;chn<16;chn++)
{
chnmute[chn]=0;
chnPatchChange(chn,0);
chnPressure(chn,127);
chnPitchBender(chn, 0x00, 0x40);
chnController(chn, CTL_MAIN_VOLUME,127);
chnController(chn, CTL_EXT_EFF_DEPTH, 0);
chnController(chn, CTL_CHORUS_DEPTH, 0);
chnController(chn, 0x4a, 127);
}
if (opl==3) ioctl(seqfd, SNDCTL_FM_4OP_ENABLE, &device);
SEQ_VOLUME_MODE(device,VOL_METHOD_LINEAR);
for (int i = 0; i < nvoices; i++)
{
SEQ_CONTROL(device, i, SEQ_VOLMODE, VOL_METHOD_LINEAR);
SEQ_STOP_NOTE(device, i, vm->note(i), 64);
}
#endif
}
void FMOut::loadFMPatches(void)
{
#ifdef HAVE_OSS_SUPPORT
char patchesfile[PATH_MAX];
char drumsfile[PATH_MAX];
int size;
struct sbi_instrument instr;
char tmp[60];
int i,j;
for ( i=0; i<256; i++ )
patchloaded[i] = 0;
int stereoeffect=rand()%3;
FILE *fh;
int datasize;
if (opl==3)
{
snprintf(patchesfile, PATH_MAX, "%s/std.o3",FMPatchesDirectory);
size=60;
}
else
{
snprintf(patchesfile, PATH_MAX, "%s/std.sb",FMPatchesDirectory);
size=52;
}
fh=fopen(patchesfile,"rb");
if (fh==NULL) return;
for (i=0;i<128;i++)
{
fread(tmp,size,1,fh);
patchloaded[i]=1;
instr.key = ((strncmp(tmp, "4OP", 3) == 0))? OPL3_PATCH : FM_PATCH;
datasize = (strncmp(tmp, "4OP", 3) == 0)? 22 : 11;
instr.device=device;
instr.channel = i;
// Let's get some stereo effect ...
tmp[46] = (tmp[46] & 0xcf) | ((++stereoeffect)<<4);
stereoeffect=stereoeffect%3;
for (j=0; j<22; j++)
instr.operators[j] = tmp[j+36];
SEQ_WRPATCH(&instr,sizeof(instr));
}
fclose(fh);
if (opl==3)
{
snprintf(drumsfile, PATH_MAX, "%s/drums.o3",FMPatchesDirectory);
}
else
{
snprintf(drumsfile, PATH_MAX, "%s/drums.sb",FMPatchesDirectory);
}
fh=fopen(drumsfile,"rb");
if (fh==NULL) return;
for (i=128;i<175;i++)
{
fread(tmp,size,1,fh);
patchloaded[i]=1;
instr.key = (strncmp(tmp, "4OP", 3) == 0)? OPL3_PATCH : FM_PATCH;
datasize = (strncmp(tmp, "4OP", 3) == 0)? 22 : 11;
instr.device=device;
instr.channel = i;
// Let's get some stereo effect ...
tmp[46] = (tmp[46] & 0xcf) | ((++stereoeffect)<<4);
stereoeffect=stereoeffect%3;
for (j=0; j<22; j++)
instr.operators[j] = tmp[j+36];
SEQ_WRPATCH(&instr,sizeof(instr));
}
fclose(fh);
#ifdef FMOUTDEBUG
printfdebug("Patches loaded\n");
#endif
#endif
}
int FMOut::patch(int p)
{
if (patchloaded[p]==1) return p;
#ifdef FMOUTDEBUG
printfdebug("Not loaded %d!\n",p);
#endif
p=0;
while ((p<256)&&(patchloaded[p]==0)) p++;
return p;
}
void FMOut::noteOn (uchar chn, uchar note, uchar vel)
{
if (vel==0)
{
noteOff(chn,note,vel);
}
else
{
if (chn==PERCUSSION_CHANNEL)
{
if (patchloaded[note+128]==0) return;
else
if (patchloaded[chnpatch[chn]]==0) return;
}
int v=vm->allocateVoice(chn,note);
int p;
if (chn==PERCUSSION_CHANNEL)
SEQ_SET_PATCH(device,v ,p=patch(note+128))
else
SEQ_SET_PATCH(device,v ,p=map->patch(chn,chnpatch[chn]));
SEQ_BENDER(device, v, chnbender[chn]);
SEQ_START_NOTE(device, v, note, vel);
// SEQ_CONTROL(device, v, CTL_MAIN_VOLUME, chncontroller[chn][CTL_MAIN_VOLUME]);
SEQ_CHN_PRESSURE(device, v , chnpressure[chn]);
}
#ifdef FMOUTDEBUG
printfdebug("Note ON >\t chn : %d\tnote : %d\tvel: %d\n",chn,note,vel);
#endif
}
void FMOut::noteOff (uchar chn, uchar note, uchar vel)
{
int i;
vm->initSearch();
while ((i=vm->search(chn,note))!=-1)
{
SEQ_STOP_NOTE(device, i, note, vel);
vm->deallocateVoice(i);
}
#ifdef FMOUTDEBUG
printfdebug("Note OFF >\t chn : %d\tnote : %d\tvel: %d\n",chn,note,vel);
#endif
}
void FMOut::keyPressure (uchar chn, uchar note, uchar vel)
{
int i;
vm->initSearch();
while ((i=vm->search(chn,note))!=-1)
SEQ_KEY_PRESSURE(device, i, note,vel);
}
void FMOut::chnPatchChange (uchar chn, uchar patch)
{
if (chn==PERCUSSION_CHANNEL) return;
int i;
vm->initSearch();
while ((i=vm->search(chn))!=-1)
SEQ_SET_PATCH(device,i,map->patch(chn,patch));
chnpatch[chn]=patch;
}
void FMOut::chnPressure (uchar chn, uchar vel)
{
int i;
vm->initSearch();
while ((i=vm->search(chn))!=-1)
SEQ_CHN_PRESSURE(device, i , vel);
chnpressure[chn]=vel;
}
void FMOut::chnPitchBender(uchar chn,uchar lsb, uchar msb)
{
chnbender[chn]=((int)msb<<7) | (lsb & 0x7F);
int i;
vm->initSearch();
while ((i=vm->search(chn))!=-1)
SEQ_BENDER(device, i, chnbender[chn]);
}
void FMOut::chnController (uchar chn, uchar ctl, uchar v)
{
if ((ctl==11)||(ctl==7))
{
v=(v*volumepercentage)/100;
if (v>127) v=127;
}
int i;
vm->initSearch();
while ((i=vm->search(chn))!=-1)
SEQ_CONTROL(device, i, ctl, v);
chncontroller[chn][ctl]=v;
}
void FMOut::sysex(uchar *, ulong )
{
}
void FMOut::setFMPatchesDirectory(const char *dir)
{
if ((dir==NULL)||(dir[0]==0)) return;
if (deleteFMPatchesDirectory)
free((char *)FMPatchesDirectory);
FMPatchesDirectory = strdup(dir);
deleteFMPatchesDirectory=1;
}
void FMOut::setVolumePercentage ( int i )
{
#ifdef HAVE_OSS_SUPPORT
int fd=open("/dev/mixer0",O_RDWR,0);
if (fd==-1) return;
int a=i*255/100;
if (a>255) a=255;
a=(a<<8) | a;
if (ioctl(fd,MIXER_WRITE(SOUND_MIXER_SYNTH),&a) == -1)
printfdebug("ERROR writing to mixer\n");
close(fd);
#endif
volumepercentage=i;
}
const char *FMOut::FMPatchesDirectory = "/etc";
int FMOut::deleteFMPatchesDirectory = 0;
FMOut::chnPressure
virtual void chnPressure(uchar chn, uchar vel)
See MidiOut::chnPressure()
Definition: fmout.cc:285
FMOut::sysex
virtual void sysex(uchar *data, ulong size)
It's an empty function, as FM devices don't support System Exclusive messages.
Definition: fmout.cc:321
FMOut::closeDev
virtual void closeDev(void)
See MidiOut::closeDev()
Definition: fmout.cc:89
FMOut::initDev
virtual void initDev(void)
See MidiOut::initDev()
Definition: fmout.cc:97
FMOut::patch
int patch(int p)
Returns p if the patch p has been loaded, or another patch (already loaded) if p hasn't been loaded...
Definition: fmout.cc:207
FMOut::FMOut
FMOut(int d=0, int total=12)
Constructor.
Definition: fmout.cc:45
FMOut::noteOn
virtual void noteOn(uchar chn, uchar note, uchar vel)
See MidiOut::noteOn()
Definition: fmout.cc:218
FMOut::~FMOut
~FMOut()
Destructor.
Definition: fmout.cc:60
FMOut::keyPressure
virtual void keyPressure(uchar chn, uchar note, uchar vel)
See MidiOut::keyPressure()
Definition: fmout.cc:266
FMOut::chnPitchBender
virtual void chnPitchBender(uchar chn, uchar lsb, uchar msb)
See MidiOut::chnPitchBender()
Definition: fmout.cc:295
FMOut::setVolumePercentage
virtual void setVolumePercentage(int i)
See MidiOut::setVolumePercentage()
Definition: fmout.cc:337
FMOut::chnController
virtual void chnController(uchar chn, uchar ctl, uchar v)
See MidiOut::chnController()
Definition: fmout.cc:306
MidiMapper::patch
uchar patch(uchar chn, uchar pgm)
Returns the patch which pgm used on channel chn should be mapped to.
Definition: midimapper.cc:431
MidiOut::ok
int ok(void)
Returns true if everything's ok and false if there has been any problem.
Definition: midiout.h:231
FMOut::openDev
virtual void openDev(int sqfd)
See MidiOut::openDev()
Definition: fmout.cc:72
FMOut::setFMPatchesDirectory
static void setFMPatchesDirectory(const char *dir)
Sets the directory where the FM patches are stored, that is, where the std.o3, std.sb, drums.o3 and drums.sb files can be found.
Definition: fmout.cc:326
FMOut::chnPatchChange
virtual void chnPatchChange(uchar chn, uchar patch)
See MidiOut::chnPatchChange()
Definition: fmout.cc:274
FMOut::noteOff
virtual void noteOff(uchar chn, uchar note, uchar vel)
See MidiOut::noteOff()
Definition: fmout.cc:251

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