| /*************************************************************************** |
| * __________ __ ___. |
| * 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 setPan(int ch, int pan) |
| { |
| // printf("\npanning[%d] %d ==> %d", ch, chPanRight[ch], pan); |
| |
| chPanLeft[ch]=128-pan; |
| chPanRight[ch]=pan; |
| } |
| |
| |
| static inline void setPatch(int ch, int pat) |
| { |
| chPat[ch]=pat; |
| } |
| |
| |
| /* |
| * Pitch Bend table, Computed by |
| * for i=0:127, fprintf('%d,', round(2^16*2^((i-64)/384))); end |
| * (When typed into Matlab) |
| * 16 bit pitch bend table |
| */ |
| /* |
| long pitchTbl[]= |
| { |
| 58386,58491,58597,58703,58809,58915,59022,59128,59235,59342,59449,59557, |
| 59664,59772,59880,59988,60097,60205,60314,60423,60532,60642,60751,60861, |
| 60971,61081,61191,61302,61413,61524,61635,61746,61858,61970,62081,62194, |
| 62306,62419,62531,62644,62757,62871,62984,63098,63212,63326,63441,63555, |
| 63670,63785,63901,64016,64132,64248,64364,64480,64596,64713,64830,64947, |
| 65065,65182,65300,65418,65536,65654,65773,65892,66011,66130,66250,66369, |
| 66489,66609,66730,66850,66971,67092,67213,67335,67456,67578,67700,67823, |
| 67945,68068,68191,68314,68438,68561,68685,68809,68933,69058,69183,69308, |
| 69433,69558,69684,69810,69936,70062,70189,70316,70443,70570,70698,70825, |
| 70953,71082,71210,71339,71468,71597,71726,71856,71985,72115,72246,72376, |
| 72507,72638,72769,72901,73032,73164,73297,73429 |
| }; |
| */ |
| |
| const uint32_t pitchTbl[] ICONST_ATTR={ |
| 58386,58412,58439,58465,58491,58518,58544,58571,58597,58624,58650,58676, |
| 58703,58729,58756,58782,58809,58836,58862,58889,58915,58942,58968,58995, |
| 59022,59048,59075,59102,59128,59155,59182,59208,59235,59262,59289,59315, |
| 59342,59369,59396,59423,59449,59476,59503,59530,59557,59584,59611,59638, |
| 59664,59691,59718,59745,59772,59799,59826,59853,59880,59907,59934,59961, |
| 59988,60015,60043,60070,60097,60124,60151,60178,60205,60233,60260,60287, |
| 60314,60341,60369,60396,60423,60450,60478,60505,60532,60560,60587,60614, |
| 60642,60669,60696,60724,60751,60779,60806,60833,60861,60888,60916,60943, |
| 60971,60998,61026,61054,61081,61109,61136,61164,61191,61219,61247,61274, |
| 61302,61330,61357,61385,61413,61440,61468,61496,61524,61551,61579,61607, |
| 61635,61663,61690,61718,61746,61774,61802,61830,61858,61886,61914,61942, |
| 61970,61997,62025,62053,62081,62109,62138,62166,62194,62222,62250,62278, |
| 62306,62334,62362,62390,62419,62447,62475,62503,62531,62560,62588,62616, |
| 62644,62673,62701,62729,62757,62786,62814,62843,62871,62899,62928,62956, |
| 62984,63013,63041,63070,63098,63127,63155,63184,63212,63241,63269,63298, |
| 63326,63355,63384,63412,63441,63470,63498,63527,63555,63584,63613,63642, |
| 63670,63699,63728,63757,63785,63814,63843,63872,63901,63929,63958,63987, |
| 64016,64045,64074,64103,64132,64161,64190,64219,64248,64277,64306,64335, |
| 64364,64393,64422,64451,64480,64509,64538,64567,64596,64626,64655,64684, |
| 64713,64742,64772,64801,64830,64859,64889,64918,64947,64976,65006,65035, |
| 65065,65094,65123,65153,65182,65211,65241,65270,65300,65329,65359,65388, |
| 65418,65447,65477,65506,65536,65566,65595,65625,65654,65684,65714,65743, |
| 65773,65803,65832,65862,65892,65922,65951,65981,66011,66041,66071,66100, |
| 66130,66160,66190,66220,66250,66280,66309,66339,66369,66399,66429,66459, |
| 66489,66519,66549,66579,66609,66639,66670,66700,66730,66760,66790,66820, |
| 66850,66880,66911,66941,66971,67001,67032,67062,67092,67122,67153,67183, |
| 67213,67244,67274,67304,67335,67365,67395,67426,67456,67487,67517,67548, |
| 67578,67609,67639,67670,67700,67731,67761,67792,67823,67853,67884,67915, |
| 67945,67976,68007,68037,68068,68099,68129,68160,68191,68222,68252,68283, |
| 68314,68345,68376,68407,68438,68468,68499,68530,68561,68592,68623,68654, |
| 68685,68716,68747,68778,68809,68840,68871,68902,68933,68965,68996,69027, |
| 69058,69089,69120,69152,69183,69214,69245,69276,69308,69339,69370,69402, |
| 69433,69464,69496,69527,69558,69590,69621,69653,69684,69716,69747,69778, |
| 69810,69841,69873,69905,69936,69968,69999,70031,70062,70094,70126,70157, |
| 70189,70221,70252,70284,70316,70348,70379,70411,70443,70475,70507,70538, |
| 70570,70602,70634,70666,70698,70730,70762,70793,70825,70857,70889,70921, |
| 70953,70985,71017,71049,71082,71114,71146,71178,71210,71242,71274,71306, |
| 71339,71371,71403,71435,71468,71500,71532,71564,71597,71629,71661,71694, |
| 71726,71758,71791,71823,71856,71888,71920,71953,71985,72018,72050,72083, |
| 72115,72148,72181,72213,72246,72278,72311,72344,72376,72409,72442,72474, |
| 72507,72540,72573,72605,72638,72671,72704,72736,72769,72802,72835,72868, |
| 72901,72934,72967,72999,73032,73065,73098,73131,73164,73197,73230,73264, |
| 73297,73330,73363,73396,73429,73462,73495,73528 |
| }; |
| |
| 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]<<FRACTSIZE) / (wf->rootFreq)) * wf->sampRate / (SAMPLE_RATE)); |
| delta = (delta * pitchTbl[chPW[ch]])>> 16; |
| |
| so->delta = delta; |
| } |
| |
| static inline void setPW(int ch, int msb, int lsb) |
| { |
| chPW[ch] = msb<<2|lsb>>5; |
| |
| 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); |
| } |
| } |
| } |
| |
| static 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: |
| { |
| setPan((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; |
| } |
| |