forked from len0rd/rockbox
midi: yield more, fixes flickering backlight fade on some targets while playing midi. Some coding style clean up, it's a little better but still a mess
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20562 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Nils Wallménius
parent
24ae50699d
commit
1adc869d9c
3 changed files with 321 additions and 353 deletions
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@ -23,10 +23,7 @@
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#include "guspat.h"
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#include "synth.h"
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extern int playingTime IBSS_ATTR;
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extern int samplesThisSecond IBSS_ATTR;
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long tempo=375000;
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long tempo = 375000;
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/* From the old patch config.... each patch is scaled.
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* Should be moved into patchset.cfg
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@ -62,13 +59,13 @@ static inline void setVolScale(int a)
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static inline void setVol(int ch, int vol)
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{
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int a=0;
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chVol[ch]=vol;
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int a;
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chVol[ch] = vol;
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/* If channel volume changes, we need to recalculate the volume scale */
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/* factor for all voices active on this channel */
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for(a=0; a<MAX_VOICES; a++)
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if(voices[a].ch == ch)
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for (a = 0; a < MAX_VOICES; a++)
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if (voices[a].ch == ch)
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setVolScale(a);
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}
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@ -77,8 +74,6 @@ static inline void setPatch(int ch, int pat)
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chPat[ch]=pat;
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}
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/*
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This is the new pitch bend table. There are 512 entries.
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The middle entry is exactly 65536 - no bending.
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@ -143,11 +138,12 @@ const uint32_t pitchTbl[] ICONST_ATTR={
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static void findDelta(struct SynthObject * so, int ch, int note)
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{
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struct GWaveform * wf = patchSet[chPat[ch]]->waveforms[patchSet[chPat[ch]]->noteTable[note]];
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so->wf=wf;
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struct GWaveform * wf =
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patchSet[chPat[ch]]->waveforms[patchSet[chPat[ch]]->noteTable[note]];
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so->wf = wf;
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/* Used to be unsigned int, but math had to be done in different order to avoid overflow */
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unsigned long long delta= 0;
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unsigned long long delta = 0;
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/*
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Old formula:
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@ -169,10 +165,10 @@ static void findDelta(struct SynthObject * so, int ch, int note)
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static inline void computeDeltas(int ch)
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{
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int a=0;
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for(a = 0; a<MAX_VOICES; a++)
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int a;
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for (a = 0; a < MAX_VOICES; a++)
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{
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if(voices[a].isUsed && voices[a].ch == ch)
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if (voices[a].isUsed && voices[a].ch == ch)
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{
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findDelta(&voices[a], ch, voices[a].note);
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}
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@ -212,16 +208,16 @@ inline void pressNote(int ch, int note, int vol)
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if(ch == 14) return;
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if(ch == 15) return;
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*/
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int a=0;
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for(a=0; a<MAX_VOICES; a++)
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int a;
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for (a = 0; a < MAX_VOICES; a++)
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{
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if(voices[a].ch == ch && voices[a].note == note)
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if (voices[a].ch == ch && voices[a].note == note)
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break;
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if(!voices[a].isUsed)
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if (!voices[a].isUsed)
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break;
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}
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if(a==MAX_VOICES)
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if (a == MAX_VOICES)
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{
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// printf("\nVoice kill");
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// printf("\nToo many voices playing at once. No more left");
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@ -229,17 +225,17 @@ inline void pressNote(int ch, int note, int vol)
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// for(a=0; a<48; a++)
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// 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);
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lastKill++;
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if(lastKill == MAX_VOICES)
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if (lastKill == MAX_VOICES)
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lastKill = 0;
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a = lastKill;
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// return; /* None available */
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}
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voices[a].ch=ch;
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voices[a].note=note;
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voices[a].vol=vol;
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voices[a].cp=0;
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voices[a].state=STATE_ATTACK;
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voices[a].decay=255;
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voices[a].ch = ch;
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voices[a].note = note;
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voices[a].vol = vol;
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voices[a].cp = 0;
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voices[a].state = STATE_ATTACK;
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voices[a].decay = 255;
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setVolScale(a);
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@ -251,28 +247,28 @@ inline void pressNote(int ch, int note, int vol)
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* sr = WAVE sampling rate
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*/
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if(ch!=9)
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if (ch != 9)
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{
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findDelta(&voices[a], ch, note);
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/* Turn it on */
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voices[a].isUsed=true;
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voices[a].isUsed = true;
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setPoint(&voices[a], 0);
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} else
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{
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if(drumSet[note]!=NULL)
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if (drumSet[note] != NULL)
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{
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if(note<35)
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if (note < 35)
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printf("NOTE LESS THAN 35, AND A DRUM PATCH EXISTS FOR THIS? WHAT THE HELL?");
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struct GWaveform * wf = drumSet[note]->waveforms[0];
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voices[a].wf=wf;
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voices[a].wf = wf;
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voices[a].delta = (((gustable[note]<<FRACTSIZE) / wf->rootFreq) * wf->sampRate / SAMPLE_RATE);
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if(wf->mode & 28)
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if (wf->mode & 28)
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// printf("\nWoah, a drum patch has a loop. Stripping the loop...");
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wf->mode = wf->mode & (255-28);
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/* Turn it on */
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voices[a].isUsed=true;
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voices[a].isUsed = true;
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setPoint(&voices[a], 0);
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} else
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@ -284,16 +280,15 @@ inline void pressNote(int ch, int note, int vol)
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static void releaseNote(int ch, int note)
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{
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if(ch==9)
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if (ch == 9)
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return;
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int a=0;
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for(a=0; a<MAX_VOICES; a++)
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int a;
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for (a = 0; a < MAX_VOICES; a++)
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{
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if(voices[a].ch == ch && voices[a].note == note)
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if (voices[a].ch == ch && voices[a].note == note)
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{
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if((voices[a].wf->mode & 28))
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if (voices[a].wf->mode & 28)
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{
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setPoint(&voices[a], 3);
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}
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@ -306,10 +301,10 @@ static void sendEvent(struct Event * ev)
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const unsigned char status_low = ev->status & 0x0F;
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const unsigned char d1 = ev->d1;
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const unsigned char d2 = ev->d2;
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switch(ev->status & 0xF0)
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switch (ev->status & 0xF0)
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{
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case MIDI_CONTROL:
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switch(d1)
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switch (d1)
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{
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case CTRL_VOLUME:
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{
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@ -318,7 +313,7 @@ static void sendEvent(struct Event * ev)
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}
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case CTRL_PANNING:
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{
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chPan[status_low]=d2;
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chPan[status_low] = d2;
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return;
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}
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case CTRL_DATAENT_MSB:
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@ -365,7 +360,7 @@ static void sendEvent(struct Event * ev)
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return;
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case MIDI_NOTE_ON:
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switch(d2)
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switch (d2)
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{
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case 0: /* Release by vol=0 */
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releaseNote(status_low, d1);
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@ -381,139 +376,131 @@ static void sendEvent(struct Event * ev)
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return;
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case MIDI_PRGM:
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if((status_low) != 9)
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if (status_low != 9)
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setPatch(status_low, d1);
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}
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}
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void rewindFile(void)
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{
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int i=0;
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for(i=0; i<mf->numTracks; i++)
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int i;
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for (i = 0; i < mf->numTracks; i++)
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{
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mf->tracks[i]->delta = 0;
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mf->tracks[i]->pos = 0;
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}
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}
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int tick(void) ICODE_ATTR;
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void seekBackward(int nsec)
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{
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int notesUsed = 0, a=0;
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int desiredTime = playingTime - nsec; /* Rewind 5 sec */
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if(desiredTime < 0)
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desiredTime = 0;
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/* Set controllers to default values */
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resetControllers();
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/* Set the tempo to defalt */
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bpm=mf->div*1000000/tempo;
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numberOfSamples=SAMPLE_RATE/bpm;
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/* Reset the tracks to start */
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rewindFile();
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/* Reset the time counter to 0 */
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playingTime = 0;
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samplesThisSecond = 0;
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/* Quickly run through any initial things that occur before notes */
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do
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{
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notesUsed = 0;
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for(a=0; a<MAX_VOICES; a++)
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if(voices[a].isUsed)
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notesUsed++;
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tick();
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} while(notesUsed == 0);
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/* Reset the time counter to 0 */
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playingTime = 0;
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samplesThisSecond = 0;
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/* Tick until goal is reached */
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while(playingTime < desiredTime)
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tick();
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}
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void seekForward(int nsec)
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{
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int desiredTime = playingTime + nsec;
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while(tick() && playingTime < desiredTime);
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}
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int tick(void)
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{
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if(mf==NULL)
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if (mf == NULL)
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return 0;
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int a=0;
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int tracksAdv=0;
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for(a=0; a<mf->numTracks; a++)
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int a, tracksAdv=0;
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for (a = 0; a < mf->numTracks; a++)
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{
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struct Track * tr = mf->tracks[a];
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if(tr == NULL)
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if (tr == NULL)
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printf("NULL TRACK: %d", a);
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//BIG DEBUG STATEMENT
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//printf("\nTrack %2d, Event = %4d of %4d, Delta = %5d, Next = %4d", a, tr->pos, tr->numEvents, tr->delta, getEvent(tr, tr->pos)->delta);
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if(tr != NULL && (tr->pos < tr->numEvents))
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if (tr != NULL && (tr->pos < tr->numEvents))
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{
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tr->delta++;
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tracksAdv++;
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while(getEvent(tr, tr->pos)->delta <= tr->delta)
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while (getEvent(tr, tr->pos)->delta <= tr->delta)
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{
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struct Event * e = getEvent(tr, tr->pos);
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if(e->status != 0xFF)
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if (e->status != 0xFF)
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{
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sendEvent(e);
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if(((e->status&0xF0) == MIDI_PRGM))
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if ((e->status&0xF0) == MIDI_PRGM)
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{
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/* printf("\nPatch Event, patch[%d] ==> %d", e->status&0xF, e->d1); */
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}
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}
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else
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{
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if(e->d1 == 0x51)
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if (e->d1 == 0x51)
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{
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tempo = (((short)e->evData[0])<<16)|(((short)e->evData[1])<<8)|(e->evData[2]);
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/* printf("\nMeta-Event: Tempo Set = %d", tempo); */
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bpm=mf->div*1000000/tempo;
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numberOfSamples=SAMPLE_RATE/bpm;
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number_of_samples=SAMPLE_RATE/bpm;
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}
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}
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tr->delta = 0;
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tr->pos++;
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if(tr->pos>=(tr->numEvents-1))
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if (tr->pos >= (tr->numEvents-1))
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break;
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}
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}
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}
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samplesThisSecond += numberOfSamples;
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samples_this_second += number_of_samples;
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while(samplesThisSecond >= SAMPLE_RATE)
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while (samples_this_second >= SAMPLE_RATE)
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{
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samplesThisSecond -= SAMPLE_RATE;
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playingTime++;
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// printf("Time: %d sec\n", playingTime);
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samples_this_second -= SAMPLE_RATE;
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playing_time++;
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}
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if(tracksAdv != 0)
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if (tracksAdv != 0)
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return 1;
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else
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return 0;
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}
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void seekBackward(int nsec)
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{
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int notes_used, a;
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int desired_time = playing_time - nsec; /* Rewind 5 sec */
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if (desired_time < 0)
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desired_time = 0;
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/* Set controllers to default values */
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resetControllers();
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/* Set the tempo to defalt */
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bpm = mf->div*1000000/tempo;
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number_of_samples = SAMPLE_RATE/bpm;
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/* Reset the tracks to start */
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rewindFile();
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/* Reset the time counter to 0 */
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playing_time = 0;
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samples_this_second = 0;
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/* Quickly run through any initial things that occur before notes */
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do
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{
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notes_used = 0;
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for (a = 0; a < MAX_VOICES; a++)
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if (voices[a].isUsed)
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notes_used++;
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tick();
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} while (notes_used == 0);
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/* Reset the time counter to 0 */
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playing_time = 0;
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samples_this_second = 0;
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/* Tick until goal is reached */
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while (playing_time < desired_time)
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tick();
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}
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void seekForward(int nsec)
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{
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int desired_time = playing_time + nsec;
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while (tick() && playing_time < desired_time);
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}
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