| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2005 Stepan Moskovchenko |
| * |
| * All files in this archive are subject to the GNU General Public License. |
| * See the file COPYING in the source tree root for full license agreement. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ****************************************************************************/ |
| #include "plugin.h" |
| #include "midiutil.h" |
| #include "guspat.h" |
| #include "synth.h" |
| |
| extern struct plugin_api * rb; |
| |
| long tempo=375000; |
| |
| /* Sets the volume scaling by channel volume and note volume */ |
| /* This way we can do the multiplication/indexing once per */ |
| /* MIDI event at the most, instead of once per sample. */ |
| static inline void setVolScale(int a) |
| { |
| struct SynthObject * so = &voices[a]; |
| so->volscale = ((signed short int)so->vol*(signed short int)chVol[so->ch]); |
| } |
| |
| static inline void setVol(int ch, int vol) |
| { |
| int a=0; |
| chVol[ch]=vol; |
| |
| /* If channel volume changes, we need to recalculate the volume scale */ |
| /* factor for all voices active on this channel */ |
| for(a=0; a<MAX_VOICES; a++) |
| if(voices[a].ch == ch) |
| setVolScale(a); |
| } |
| |
| static inline void setPatch(int ch, int pat) |
| { |
| chPat[ch]=pat; |
| } |
| |
| |
| |
| /* |
| This is the new pitch bend table. There are 512 entries. |
| The middle entry is exactly 65536 - no bending. |
| |
| The range of the table is one semitone /in either direction/ |
| Ie, one semitone from the center. |
| |
| Bends beyond this can be achieved by first offsetting the index |
| into the GUS frequency table by the appropriate number of semitones, |
| and then using this table to bend the rest of the way. |
| |
| Generated using Matlab code: |
| for i=0:512, fprintf('%d,', round(2^16*2^((i-256)/1536))); end |
| */ |
| |
| const uint32_t pitchTbl[] ICONST_ATTR={ |
| 61858,61872,61886,61900,61914,61928,61942,61956,61970,61983,61997,62011, |
| 62025,62039,62053,62067,62081,62095,62109,62124,62138,62152,62166,62180, |
| 62194,62208,62222,62236,62250,62264,62278,62292,62306,62320,62334,62348, |
| 62362,62376,62390,62404,62419,62433,62447,62461,62475,62489,62503,62517, |
| 62531,62545,62560,62574,62588,62602,62616,62630,62644,62658,62673,62687, |
| 62701,62715,62729,62743,62757,62772,62786,62800,62814,62828,62843,62857, |
| 62871,62885,62899,62913,62928,62942,62956,62970,62984,62999,63013,63027, |
| 63041,63056,63070,63084,63098,63112,63127,63141,63155,63169,63184,63198, |
| 63212,63227,63241,63255,63269,63284,63298,63312,63326,63341,63355,63369, |
| 63384,63398,63412,63427,63441,63455,63470,63484,63498,63512,63527,63541, |
| 63555,63570,63584,63599,63613,63627,63642,63656,63670,63685,63699,63713, |
| 63728,63742,63757,63771,63785,63800,63814,63829,63843,63857,63872,63886, |
| 63901,63915,63929,63944,63958,63973,63987,64002,64016,64030,64045,64059, |
| 64074,64088,64103,64117,64132,64146,64161,64175,64190,64204,64219,64233, |
| 64248,64262,64277,64291,64306,64320,64335,64349,64364,64378,64393,64407, |
| 64422,64436,64451,64465,64480,64494,64509,64524,64538,64553,64567,64582, |
| 64596,64611,64626,64640,64655,64669,64684,64699,64713,64728,64742,64757, |
| 64772,64786,64801,64815,64830,64845,64859,64874,64889,64903,64918,64933, |
| 64947,64962,64976,64991,65006,65020,65035,65050,65065,65079,65094,65109, |
| 65123,65138,65153,65167,65182,65197,65211,65226,65241,65256,65270,65285, |
| 65300,65315,65329,65344,65359,65374,65388,65403,65418,65433,65447,65462, |
| 65477,65492,65506,65521,65536,65551,65566,65580,65595,65610,65625,65640, |
| 65654,65669,65684,65699,65714,65729,65743,65758,65773,65788,65803,65818, |
| 65832,65847,65862,65877,65892,65907,65922,65936,65951,65966,65981,65996, |
| 66011,66026,66041,66056,66071,66085,66100,66115,66130,66145,66160,66175, |
| 66190,66205,66220,66235,66250,66265,66280,66294,66309,66324,66339,66354, |
| 66369,66384,66399,66414,66429,66444,66459,66474,66489,66504,66519,66534, |
| 66549,66564,66579,66594,66609,66624,66639,66654,66670,66685,66700,66715, |
| 66730,66745,66760,66775,66790,66805,66820,66835,66850,66865,66880,66896, |
| 66911,66926,66941,66956,66971,66986,67001,67016,67032,67047,67062,67077, |
| 67092,67107,67122,67137,67153,67168,67183,67198,67213,67228,67244,67259, |
| 67274,67289,67304,67320,67335,67350,67365,67380,67395,67411,67426,67441, |
| 67456,67472,67487,67502,67517,67532,67548,67563,67578,67593,67609,67624, |
| 67639,67655,67670,67685,67700,67716,67731,67746,67761,67777,67792,67807, |
| 67823,67838,67853,67869,67884,67899,67915,67930,67945,67961,67976,67991, |
| 68007,68022,68037,68053,68068,68083,68099,68114,68129,68145,68160,68176, |
| 68191,68206,68222,68237,68252,68268,68283,68299,68314,68330,68345,68360, |
| 68376,68391,68407,68422,68438,68453,68468,68484,68499,68515,68530,68546, |
| 68561,68577,68592,68608,68623,68639,68654,68670,68685,68701,68716,68732, |
| 68747,68763,68778,68794,68809,68825,68840,68856,68871,68887,68902,68918, |
| 68933,68949,68965,68980,68996,69011,69027,69042,69058,69074,69089,69105, |
| 69120,69136,69152,69167,69183,69198,69214,69230,69245,69261,69276,69292, |
| 69308,69323,69339,69355,69370,69386,69402,69417,69433 |
| }; |
| |
| |
| static void findDelta(struct SynthObject * so, int ch, int note) |
| { |
| |
| struct GWaveform * wf = patchSet[chPat[ch]]->waveforms[patchSet[chPat[ch]]->noteTable[note]]; |
| so->wf=wf; |
| unsigned int delta= 0; |
| delta = (((gustable[note+chPBNoteOffset[ch]]<<FRACTSIZE) / (wf->rootFreq)) * wf->sampRate / (SAMPLE_RATE)); |
| delta = (delta * chPBFractBend[ch])>> 16; |
| |
| so->delta = delta; |
| } |
| |
| static inline void setPW(int ch, int msb, int lsb) |
| { |
| chPW[ch] = msb<<2|lsb>>5; |
| |
| int totalBend = (chPW[ch]-256) * chPBDepth[ch]; |
| chPBNoteOffset[ch] = totalBend >> 8; |
| chPBFractBend[ch] = pitchTbl[(totalBend & 0xFF) + 256]; |
| |
| int a=0; |
| for(a = 0; a<MAX_VOICES; a++) |
| { |
| if(voices[a].isUsed==1 && voices[a].ch == ch) |
| { |
| findDelta(&voices[a], ch, voices[a].note); |
| } |
| } |
| } |
| |
| inline void pressNote(int ch, int note, int vol) |
| { |
| static int lastKill = 0; |
| /* Silences all channels but one, for easy debugging, for me. */ |
| /* |
| if(ch == 0) return; |
| if(ch == 1) return; |
| if(ch == 2) return; |
| if(ch == 3) return; |
| if(ch == 4) return; |
| if(ch == 5) return; |
| if(ch == 6) return; |
| if(ch == 7) return; |
| if(ch == 8) return; |
| if(ch == 9) return; |
| if(ch == 10) return; |
| if(ch == 11) return; |
| if(ch == 12) return; |
| if(ch == 13) return; |
| if(ch == 14) return; |
| if(ch == 15) return; |
| */ |
| int a=0; |
| for(a=0; a<MAX_VOICES; a++) |
| { |
| if(voices[a].ch == ch && voices[a].note == note) |
| break; |
| |
| if(voices[a].isUsed==0) |
| break; |
| } |
| if(a==MAX_VOICES) |
| { |
| // printf("\nVoice kill"); |
| // printf("\nToo many voices playing at once. No more left"); |
| // printf("\nVOICE DUMP: "); |
| // for(a=0; a<48; a++) |
| // printf("\n#%d Ch=%d Note=%d curRate=%d curOffset=%d curPoint=%d targetOffset=%d", a, voices[a].ch, voices[a].note, voices[a].curRate, voices[a].curOffset, voices[a].curPoint, voices[a].targetOffset); |
| lastKill++; |
| if(lastKill == MAX_VOICES) |
| lastKill = 0; |
| a = lastKill; |
| // return; /* None available */ |
| } |
| voices[a].ch=ch; |
| voices[a].note=note; |
| voices[a].vol=vol; |
| voices[a].cp=0; |
| voices[a].state=STATE_ATTACK; |
| voices[a].decay=255; |
| |
| setVolScale(a); |
| |
| voices[a].loopState=STATE_NONLOOPING; |
| voices[a].loopDir = LOOPDIR_FORWARD; |
| /* |
| * OKAY. Gt = Gus Table value |
| * rf = Root Frequency of wave |
| * SR = sound sampling rate |
| * sr = WAVE sampling rate |
| */ |
| |
| if(ch!=9) |
| { |
| findDelta(&voices[a], ch, note); |
| /* Turn it on */ |
| voices[a].isUsed=1; |
| setPoint(&voices[a], 0); |
| } else |
| { |
| if(drumSet[note]!=NULL) |
| { |
| if(note<35) |
| printf("NOTE LESS THAN 35, AND A DRUM PATCH EXISTS FOR THIS? WHAT THE HELL?"); |
| |
| struct GWaveform * wf = drumSet[note]->waveforms[0]; |
| voices[a].wf=wf; |
| voices[a].delta = (((gustable[note]<<10) / wf->rootFreq) * wf->sampRate / SAMPLE_RATE); |
| if(wf->mode & 28) |
| // printf("\nWoah, a drum patch has a loop. Stripping the loop..."); |
| wf->mode = wf->mode & (255-28); |
| |
| /* Turn it on */ |
| voices[a].isUsed=1; |
| setPoint(&voices[a], 0); |
| |
| } else |
| { |
| /* printf("\nWarning: drum %d does not have a patch defined... Ignoring it", note); */ |
| } |
| } |
| } |
| |
| static void releaseNote(int ch, int note) |
| { |
| |
| if(ch==9) |
| return; |
| |
| int a=0; |
| for(a=0; a<MAX_VOICES; a++) |
| { |
| if(voices[a].ch == ch && voices[a].note == note) |
| { |
| if((voices[a].wf->mode & 28)) |
| { |
| setPoint(&voices[a], 3); |
| } |
| } |
| } |
| } |
| |
| static void sendEvent(struct Event * ev) |
| { |
| const unsigned char status_low = ev->status & 0x0F; |
| const unsigned char d1 = ev->d1; |
| const unsigned char d2 = ev->d2; |
| switch(ev->status & 0xF0) |
| { |
| case MIDI_CONTROL: |
| switch(d1) |
| { |
| case CTRL_VOLUME: |
| { |
| setVol((status_low), d2); |
| return; |
| } |
| case CTRL_PANNING: |
| { |
| chPan[status_low]=d2; |
| return; |
| } |
| case CTRL_PWDEPTH: |
| { |
| /* TODO: Update all deltas. Is this really needed? */ |
| chPBDepth[status_low] = d2; |
| return; |
| } |
| |
| } |
| break; |
| |
| case MIDI_PITCHW: |
| setPW((status_low), d2, d1); |
| return; |
| |
| case MIDI_NOTE_ON: |
| switch(d2) |
| { |
| case 0: /* Release by vol=0 */ |
| releaseNote(status_low, d1); |
| return; |
| |
| default: |
| pressNote(status_low, d1, d2); |
| return; |
| } |
| |
| case MIDI_NOTE_OFF: |
| releaseNote(status_low, d1); |
| return; |
| |
| case MIDI_PRGM: |
| if((status_low) != 9) |
| setPatch(status_low, d1); |
| } |
| } |
| |
| int tick(void) ICODE_ATTR; |
| int tick(void) |
| { |
| if(mf==NULL) |
| return 0; |
| |
| int a=0; |
| int tracksAdv=0; |
| for(a=0; a<mf->numTracks; a++) |
| { |
| struct Track * tr = mf->tracks[a]; |
| |
| if(tr == NULL) |
| printf("NULL TRACK: %d", a); |
| |
| |
| //BIG DEBUG STATEMENT |
| //printf("\nTrack %2d, Event = %4d of %4d, Delta = %5d, Next = %4d", a, tr->pos, tr->numEvents, tr->delta, getEvent(tr, tr->pos)->delta); |
| |
| |
| if(tr != NULL && (tr->pos < tr->numEvents)) |
| { |
| tr->delta++; |
| tracksAdv++; |
| while(getEvent(tr, tr->pos)->delta <= tr->delta) |
| { |
| struct Event * e = getEvent(tr, tr->pos); |
| |
| if(e->status != 0xFF) |
| { |
| sendEvent(e); |
| if(((e->status&0xF0) == MIDI_PRGM)) |
| { |
| /* printf("\nPatch Event, patch[%d] ==> %d", e->status&0xF, e->d1); */ |
| } |
| } |
| else |
| { |
| if(e->d1 == 0x51) |
| { |
| tempo = (((short)e->evData[0])<<16)|(((short)e->evData[1])<<8)|(e->evData[2]); |
| /* printf("\nMeta-Event: Tempo Set = %d", tempo); */ |
| bpm=mf->div*1000000/tempo; |
| numberOfSamples=SAMPLE_RATE/bpm; |
| |
| } |
| } |
| tr->delta = 0; |
| tr->pos++; |
| if(tr->pos>=(tr->numEvents-1)) |
| break; |
| } |
| } |
| } |
| |
| if(tracksAdv != 0) |
| return 1; |
| else |
| return 0; |
| } |
| |