c4669ce825
A new challenger has arrived. It looks like basically... any network traffic causes glitches in the ADC in. Not sure how to attack that yet.
114 lines
3.4 KiB
C
114 lines
3.4 KiB
C
//Copyright 2015 <>< Charles Lohr under the ColorChord License.
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#ifndef _EMBEDDEDNF_H
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#define _EMBEDDEDNF_H
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#include <ccconfig.h>
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//Use a 32-bit DFT. It won't work for AVRs, but for any 32-bit systems where
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//they can multiply quickly, this is the bees knees.
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#define USE_32DFT
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#ifndef DFREQ
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#define DFREQ 8000
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#endif
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//You may make this a float. If PRECOMPUTE_FREQUENCY_TABLE is defined, then
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//it will create the table at compile time, and the float will never be used
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//runtime.
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#define BASE_FREQ 55.0
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//The higher the number the slackier your FFT will be come.
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#ifndef FUZZ_IIR_BITS
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#define FUZZ_IIR_BITS 1
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#endif
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//Notes are the individually identifiable notes we receive from the sound.
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//We track up to this many at one time. Just because a note may appear to
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//vaporize in one frame doesn't mean it is annihilated immediately.
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#ifndef MAXNOTES
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#define MAXNOTES 12
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#endif
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//We take the raw signal off of the
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#ifndef FILTER_BLUR_PASSES
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#define FILTER_BLUR_PASSES 2
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#endif
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//Determines bit shifts for where notes lie. We represent notes with an
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//uint8_t. We have to define all of the possible locations on the note line
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//in this. note_frequency = 0..((1<<SEMIBITSPERBIN)*FIXBPERO-1)
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#ifndef SEMIBITSPERBIN
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#define SEMIBITSPERBIN 3
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#endif
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#define NOTERANGE ((1<<SEMIBITSPERBIN)*FIXBPERO)
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//If there is detected note this far away from an established note, we will
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//then consider this new note the same one as last time, and move the
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//established note. This is also used when combining notes. It is this
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//distance times two.
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#ifndef MAX_JUMP_DISTANCE
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#define MAX_JUMP_DISTANCE 4
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#endif
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#ifndef MAX_COMBINE_DISTANCE
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#define MAX_COMBINE_DISTANCE 7
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#endif
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//These control how quickly the IIR for the note strengths respond. AMP 1 is
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//the response for the slow-response, or what we use to determine size of
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//splotches, AMP 2 is the quick response, or what we use to see the visual
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//strength of the notes.
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#ifndef AMP_1_IIR_BITS
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#define AMP_1_IIR_BITS 4
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#endif
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#ifndef AMP_2_IIR_BITS
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#define AMP_2_IIR_BITS 2
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#endif
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//This is the amplitude, coming from folded_bins. If the value is below this
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//it is considered a non-note.
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#ifndef MIN_AMP_FOR_NOTE
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#define MIN_AMP_FOR_NOTE 80
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#endif
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//If the strength of a note falls below this, the note will disappear, and be
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//recycled back into the unused list of notes.
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#ifndef MINIMUM_AMP_FOR_NOTE_TO_DISAPPEAR
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#define MINIMUM_AMP_FOR_NOTE_TO_DISAPPEAR 64
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#endif
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//This prevents compilation of any floating-point code, but it does come with
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//an added restriction: Both DFREQ and BASE_FREQ must be #defined to be
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//constants.
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#define PRECOMPUTE_FREQUENCY_TABLE
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#include "DFT32.h"
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extern uint16_t fuzzed_bins[]; //[FIXBINS] <- The Full DFT after IIR, Blur and Taper
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extern uint16_t folded_bins[]; //[FIXBPERO] <- The folded fourier output.
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//frequency of note; Note if it is == 255, then it means it is not set. It is
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//generally a value from
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extern uint8_t note_peak_freqs[]; //[MAXNOTES]
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extern uint16_t note_peak_amps[]; //[MAXNOTES]
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extern uint16_t note_peak_amps2[]; //[MAXNOTES] (Responds quicker)
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extern uint8_t note_jumped_to[]; //[MAXNOTES] When a note combines into another one,
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//this records where it went. I.e. if your note just disappeared, check this flag.
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void UpdateFreqs(); //Not user-useful on most systems.
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void HandleFrameInfo(); //Not user-useful on most systems
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//Call this when starting.
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void InitColorChord();
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#endif
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