BPoH_Voodoo
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/*
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Custom effect that mimics a multiband VU meter
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Keith Lord - 2018
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LICENSE
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The MIT License (MIT)
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Copyright (c) 2018 Keith Lord
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sub-license, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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CHANGELOG
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2018-08-21 initial version
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*/
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#ifndef VUMeter_h
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#define VUMeter_h
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#include <WS2812FX.h>
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#ifndef NUM_BANDS
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#define NUM_BANDS 2
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#endif
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// set USE_RANDOM_DATA to false in the line below if vuMeterBands[] is populated
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// by an external data source. otherwise random data will be used for the effect.
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#ifndef USE_RANDOM_DATA
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#define USE_RANDOM_DATA true
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#endif
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extern WS2812FX ws2812fx;
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uint8_t vuMeterBands[NUM_BANDS]; // global VU meter band amplitude data (range 0-255)
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uint16_t vuMeter(void) {
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WS2812FX::Segment* seg = ws2812fx.getSegment();
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uint16_t seglen = seg->stop - seg->start + 1;
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uint16_t bandSize = seglen / NUM_BANDS;
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for(uint8_t i=0; i<NUM_BANDS; i++) {
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#if USE_RANDOM_DATA
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int randomData = vuMeterBands[i] + ws2812fx.random8(32) - ws2812fx.random8(32);
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vuMeterBands[i] = (randomData < 0 || randomData > 255) ? 128 : randomData;
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#endif
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uint8_t scaledBand = (vuMeterBands[i] * bandSize) / 256;
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for(uint16_t j=0; j<bandSize; j++) {
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uint16_t index = seg->start + (i * bandSize) + j;
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if(j <= scaledBand) {
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if(j < bandSize - 4) ws2812fx.setPixelColor(index, seg->colors[0]);
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else if(j < bandSize - 2) ws2812fx.setPixelColor(index, seg->colors[1]);
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else ws2812fx.setPixelColor(index, seg->colors[2]);
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} else {
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ws2812fx.setPixelColor(index, BLACK);
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}
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}
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}
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return seg->speed;
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}
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#endif
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