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'Software' was the directory everything that was not KiCad ended up in, which stopped describing anything a while ago - Validation and the web app are software too. Worse, it put the shared parts inside the firmware, where they read as the firmware's own. They are not. Effects/ has three consumers built from it: the firmware, Validation's bench, and the web app's controls, all generated from the same POT: comments by gen_effects.py. Audio/ has two - the bench compiles the same biquads, the same envelope followers and the same single_sample(), which is the whole reason a measurement on a workstation says anything about the pedal. Neither belongs under Firmware/, so neither is under it any more: Effects/ one file per effect Audio/ the DSP they are built from, and the audio loop Firmware/ the rest of what runs on the pedal, and the submodules WebMIDI/ the web app scripts/ what the build runs Validation/ unchanged Hardware/, Documentation/, Images/ CMakeLists.txt and the wrapper Makefile move to the top with them, because the build now consumes four of those directories and generates into a fifth. board.local and build/ come along; MIDI_CC_MAP.md is generated into Documentation/ rather than into the old Software/ root. scripts/ goes with the build rather than staying under the firmware, because six of the ten had nothing to do with the firmware: gen_effects.py reads Effects/ and writes to three different places, pow2/log2/quarter_sine generate Audio/'s tables, check-readme.py compares Effects/ against the README, and server.py serves the web app. Four of them are invoked from Validation, which was reaching into Firmware/ for tooling - the same burying this commit is undoing. The four that really are about the firmware are ELF checks the top-level build drives anyway, and a second scripts directory would only be a second place to look. C includes say "Audio/foo.h" and the generated map says "Effects/bar.h", with the repository root on the include path for both the firmware and the bench. Spelling the directory out rather than relying on a bare name is what keeps Audio/cycles.h shimmable: a quoted include searches the including file's own directory first. The submodules are renamed as well as moved. git mv updates their paths but leaves the section names, and 'Software/pico-sdk' surviving in .gitmodules would be the word this commit removes, still load-bearing. That meant the nested modules under pico-sdk too - six .git files pointing into .git/modules/Software - which is why 'git submodule update --init --recursive' is worth running once after pulling this. Verified rather than assumed: a clean configure and build, make check (failing only on the missing-eeprom case it already failed on), check-effects, all four analysis pages reproducing every series and drawing every chart, and a flash to the board that still measures a routed reverb where it did before. One latent bug fell out of it. bench/coeff declared only quarter_sine.h of the three generated math tables, and Audio/util.h includes pow2.h and log2.h as well - so building that target with an empty gen/ could never have worked. 'make bench' builds bench/bench first, which generates all three, so it stayed hidden until this rebuilt everything from nothing. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
// NAME: Boost [BOOST]
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// PRIORITY: 40
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// POT: "Boost" LINEAR(0.0 40.0) = 0.0 dB
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// POT: "Level" LINEAR(-40.0 0.0) = 0.0 dB
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// POT: "Basscut" FREQUENCY(10.0 200.0) = 30 Hz
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// POT: "Highcut" FREQUENCY(1.0 20.0) = 3.4 kHz
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// DEFAULT_MIX: 0.5
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struct {
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float mult, level;
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struct biquad basscut, highcut;
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} boost;
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void boost_init(unsigned char pot[10])
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{
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boost.mult = db_to_level(boost_boost_pot(pot));
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boost.level = db_to_level(boost_level_pot(pot));
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biquad_hpf(&boost.basscut, boost_basscut_pot(pot), 0.707);
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biquad_lpf(&boost.highcut, boost_highcut_pot(pot)*1000, 0.707);
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}
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static float fold(float in, float level)
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{
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float fold_scale = 0.5;
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boost_effect.intense = 1;
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for (;;) {
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float over = (in - level) * fold_scale;
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in = level - over;
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if (in >= -level)
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return in;
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over = (in + level) * fold_scale;
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in = - level - over;
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if (in <= level)
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return in;
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}
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}
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static float boost_step(float in)
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{
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float out = in * boost.mult;
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out = biquad_step(&boost.basscut, out);
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out = biquad_step(&boost.highcut, out);
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if (out > boost.level)
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out = fold(out, boost.level);
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else if (out < -boost.level)
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out = -fold(-out, boost.level);
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return out;
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}
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