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colorchord/embeddedcommon/embeddedout.c

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C
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#include "embeddedout.h"
//uint8_t ledArray[NUM_LIN_LEDS]; //Points to which notes correspond to these LEDs
uint8_t ledOut[NUM_LIN_LEDS*3];
uint16_t ledSpin;
uint16_t ledAmpOut[NUM_LIN_LEDS];
uint8_t ledFreqOut[NUM_LIN_LEDS];
uint8_t ledFreqOutOld[NUM_LIN_LEDS];
uint8_t RootNoteOffset;
void UpdateLinearLEDs()
{
//Source material:
/*
extern uint8_t note_peak_freqs[];
extern uint16_t note_peak_amps[]; //[MAXNOTES]
extern uint16_t note_peak_amps2[]; //[MAXNOTES] (Responds quicker)
extern uint8_t note_jumped_to[]; //[MAXNOTES] When a note combines into another one,
*/
//Goal: Make splotches of light that are porportional to the strength of notes.
//Color them according to value in note_peak_amps2.
uint8_t i;
int8_t k;
uint16_t j, l;
uint32_t total_size_all_notes = 0;
int32_t porpamps[MAXNOTES]; //LEDs for each corresponding note.
uint8_t sorted_note_map[MAXNOTES]; //mapping from which note into the array of notes from the rest of the system.
uint8_t sorted_map_count = 0;
uint32_t note_nerf_a = 0;
for( i = 0; i < MAXNOTES; i++ )
{
if( note_peak_freqs[i] == 255 ) continue;
note_nerf_a += note_peak_amps[i];
}
note_nerf_a = ((note_nerf_a * NERF_NOTE_PORP)>>8);
for( i = 0; i < MAXNOTES; i++ )
{
uint16_t ist = note_peak_amps[i];
uint8_t nff = note_peak_freqs[i];
if( nff == 255 )
{
continue;
}
if( ist < note_nerf_a )
{
continue;
}
#if SORT_NOTES
for( j = 0; j < sorted_map_count; j++ )
{
if( note_peak_freqs[ sorted_note_map[j] ] > nff )
{
break;
}
}
for( k = sorted_map_count; k > j; k-- )
{
sorted_note_map[k] = sorted_note_map[k-1];
}
sorted_note_map[j] = i;
#else
#endif
sorted_note_map[sorted_map_count] = i;
sorted_map_count++;
}
#if 0
for( i = 0; i < sorted_map_count; i++ )
{
printf( "%d: %d: %d /", sorted_note_map[i], note_peak_freqs[sorted_note_map[i]], note_peak_amps[sorted_note_map[i]] );
}
printf( "\n" );
#endif
uint16_t local_peak_amps[MAXNOTES];
uint16_t local_peak_amps2[MAXNOTES];
uint8_t local_peak_freq[MAXNOTES];
//Make a copy of all of the variables into local ones so we don't have to keep double-dereferencing.
for( i = 0; i < sorted_map_count; i++ )
{
//printf( "%5d ", local_peak_amps[i] );
local_peak_amps[i] = note_peak_amps[sorted_note_map[i]] - note_nerf_a;
local_peak_amps2[i] = note_peak_amps2[sorted_note_map[i]];
local_peak_freq[i] = note_peak_freqs[sorted_note_map[i]];
// printf( "%5d ", local_peak_amps[i] );
}
// printf( "\n" );
for( i = 0; i < sorted_map_count; i++ )
{
uint16_t ist = local_peak_amps[i];
porpamps[i] = 0;
total_size_all_notes += local_peak_amps[i];
}
if( total_size_all_notes == 0 )
{
for( j = 0; j < NUM_LIN_LEDS * 3; j++ )
{
ledOut[j] = 0;
}
return;
}
uint32_t porportional = (uint32_t)(NUM_LIN_LEDS<<16)/((uint32_t)total_size_all_notes);
uint16_t total_accounted_leds = 0;
for( i = 0; i < sorted_map_count; i++ )
{
porpamps[i] = (local_peak_amps[i] * porportional) >> 16;
total_accounted_leds += porpamps[i];
}
int16_t total_unaccounted_leds = NUM_LIN_LEDS - total_accounted_leds;
int addedlast = 1;
do
{
for( i = 0; i < sorted_map_count && total_unaccounted_leds; i++ )
{
porpamps[i]++; total_unaccounted_leds--;
addedlast = 1;
}
} while( addedlast && total_unaccounted_leds );
//Put the frequencies on a ring.
j = 0;
for( i = 0; i < sorted_map_count; i++ )
{
while( porpamps[i] > 0 )
{
ledFreqOut[j] = local_peak_freq[i];
ledAmpOut[j] = (local_peak_amps2[i]*NOTE_FINAL_AMP)>>8;
j++;
porpamps[i]--;
}
}
//This part totally can't run on an embedded system.
#if LIN_WRAPAROUND
uint16_t midx = 0;
uint32_t mqty = 100000000;
for( j = 0; j < NUM_LIN_LEDS; j++ )
{
uint32_t dqty;
uint16_t localj;
dqty = 0;
localj = j;
for( l = 0; l < NUM_LIN_LEDS; l++ )
{
int32_t d = (int32_t)ledFreqOut[localj] - (int32_t)ledFreqOutOld[l];
if( d < 0 ) d *= -1;
if( d > (NOTERANGE>>1) ) { d = NOTERANGE - d + 1; }
dqty += ( d * d );
localj++;
if( localj == NUM_LIN_LEDS ) localj = 0;
}
if( dqty < mqty )
{
mqty = dqty;
midx = j;
}
}
ledSpin = midx;
#else
ledSpin = 0;
#endif
j = ledSpin;
for( l = 0; l < NUM_LIN_LEDS; l++, j++ )
{
if( j >= NUM_LIN_LEDS ) j = 0;
ledFreqOutOld[l] = ledFreqOut[j];
uint16_t amp = ledAmpOut[j];
if( amp > 255 ) amp = 255;
uint32_t color = ECCtoHEX( (ledFreqOut[j]+RootNoteOffset)%NOTERANGE, 255, amp );
ledOut[l*3+0] = ( color >> 0 ) & 0xff;
ledOut[l*3+1] = ( color >> 8 ) & 0xff;
ledOut[l*3+2] = ( color >>16 ) & 0xff;
}
/* j = ledSpin;
for( i = 0; i < sorted_map_count; i++ )
{
while( porpamps[i] > 0 )
{
uint16_t amp = ((uint32_t)local_peak_amps2[i] * NOTE_FINAL_AMP) >> 8;
if( amp > 255 ) amp = 255;
uint32_t color = ECCtoHEX( local_peak_freq[i], 255, amp );
ledOut[j*3+0] = ( color >> 0 ) & 0xff;
ledOut[j*3+1] = ( color >> 8 ) & 0xff;
ledOut[j*3+2] = ( color >>16 ) & 0xff;
j++;
if( j == NUM_LIN_LEDS ) j = 0;
porpamps[i]--;
}
}*/
//Now, we use porpamps to march through the LEDs, coloring them.
/* j = 0;
for( i = 0; i < sorted_map_count; i++ )
{
while( porpamps[i] > 0 )
{
uint16_t amp = ((uint32_t)local_peak_amps2[i] * NOTE_FINAL_AMP) >> 8;
if( amp > 255 ) amp = 255;
uint32_t color = ECCtoHEX( local_peak_freq[i], 255, amp );
ledOut[j*3+0] = ( color >> 0 ) & 0xff;
ledOut[j*3+1] = ( color >> 8 ) & 0xff;
ledOut[j*3+2] = ( color >>16 ) & 0xff;
j++;
porpamps[i]--;
}
}*/
}
uint32_t ECCtoHEX( uint8_t note, uint8_t sat, uint8_t val )
{
uint16_t hue = 0;
uint16_t third = 65535/3;
uint16_t scalednote = note;
uint32_t renote = ((uint32_t)note * 65536) / NOTERANGE;
//Note is expected to be a vale from 0..(NOTERANGE-1)
//renote goes from 0 to the next one under 65536.
if( renote < third )
{
//Yellow to Red.
hue = (third - renote) >> 1;
}
else if( renote < (third<<1) )
{
//Red to Blue
hue = (third-renote);
}
else
{
//hue = ((((65535-renote)>>8) * (uint32_t)(third>>8)) >> 1) + (third<<1);
hue = (uint16_t)(((uint32_t)(65536-renote)<<16) / (third<<1)) + (third>>1); // ((((65535-renote)>>8) * (uint32_t)(third>>8)) >> 1) + (third<<1);
}
hue >>= 8;
return EHSVtoHEX( hue, sat, val );
}
uint32_t EHSVtoHEX( uint8_t hue, uint8_t sat, uint8_t val )
{
#define SIXTH1 43
#define SIXTH2 85
#define SIXTH3 128
#define SIXTH4 171
#define SIXTH5 213
uint16_t or = 0, og = 0, ob = 0;
hue -= SIXTH1; //Off by 60 degrees.
//TODO: There are colors that overlap here, consider
//tweaking this to make the best use of the colorspace.
if( hue < SIXTH1 ) //Ok: Yellow->Red.
{
or = 255;
og = 255 - ((uint16_t)hue * 255) / (SIXTH1);
}
else if( hue < SIXTH2 ) //Ok: Red->Purple
{
or = 255;
ob = (uint16_t)hue*255 / SIXTH1 - 255;
}
else if( hue < SIXTH3 ) //Ok: Purple->Blue
{
ob = 255;
or = ((SIXTH3-hue) * 255) / (SIXTH1);
}
else if( hue < SIXTH4 ) //Ok: Blue->Cyan
{
ob = 255;
og = (hue - SIXTH3)*255 / SIXTH1;
}
else if( hue < SIXTH5 ) //Ok: Cyan->Green.
{
og = 255;
ob = ((SIXTH5-hue)*255) / SIXTH1;
}
else //Green->Yellow
{
og = 255;
or = (hue - SIXTH5) * 255 / SIXTH1;
}
uint16_t rv = val;
if( rv > 128 ) rv++;
uint16_t rs = sat;
if( rs > 128 ) rs++;
//or, og, ob range from 0...255 now.
//Need to apply saturation and value.
or = (or * val)>>8;
og = (og * val)>>8;
ob = (ob * val)>>8;
//OR..OB == 0..65025
or = or * rs + 255 * (256-rs);
og = og * rs + 255 * (256-rs);
ob = ob * rs + 255 * (256-rs);
//printf( "__%d %d %d =-> %d\n", or, og, ob, rs );
or >>= 8;
og >>= 8;
ob >>= 8;
return or | (og<<8) | ((uint32_t)ob<<16);
}
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