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-rw-r--r--libtdemid/fmout.cc354
1 files changed, 354 insertions, 0 deletions
diff --git a/libtdemid/fmout.cc b/libtdemid/fmout.cc
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+++ b/libtdemid/fmout.cc
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+/**************************************************************************
+
+ 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/libtdemid.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[strlen(FMPatchesDirectory)+7+1];
+ char drumsfile[strlen(FMPatchesDirectory)+9+1];
+ 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, sizeof(patchesfile), "%s/std.o3",FMPatchesDirectory);
+ size=60;
+ }
+ else
+ {
+ snprintf(patchesfile, sizeof(patchesfile), "%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, sizeof(drumsfile), "%s/drums.o3",FMPatchesDirectory);
+ }
+ else
+ {
+ snprintf(drumsfile, sizeof(drumsfile), "%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;
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