From 9fbf91db06a6d4f4b5cd8bb45389a731bb86bf22 Mon Sep 17 00:00:00 2001
From: Richard <q@1bpm.net>
Date: Sun, 13 Apr 2025 18:48:02 +0100
Subject: initial

---
 site/udo/spectral_sampler.udo | 126 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100755 site/udo/spectral_sampler.udo

(limited to 'site/udo/spectral_sampler.udo')

diff --git a/site/udo/spectral_sampler.udo b/site/udo/spectral_sampler.udo
new file mode 100755
index 0000000..04f1f4d
--- /dev/null
+++ b/site/udo/spectral_sampler.udo
@@ -0,0 +1,126 @@
+#ifndef UDO_SPECTRALSAMPLER
+#define UDO_SPECTRALSAMPLER ##
+/*
+	Spectral sampler
+
+	This file is part of the SONICS UDO collection by Richard Knight 2021
+		License: GPL-2.0-or-later
+		http://1bpm.net
+*/
+
+
+/*
+ ; pvs buffer handle and length storage
+gipvsBuffers[] init 8
+gipvsBufferLengths[] init lenarray(gipvsBuffers)
+
+; record to a spectral sampling buffer
+; ibuffer spectralsamplerecord ain, iduration, ifftsize
+opcode spectralsamplerrecord, i, aio
+	ain, iduration, ifftsize xin
+	if (ifftsize == 0) then
+		ifftsize = 1024
+	endif
+	kamp linseg 0, iduration * 0.01, 1, iduration * 0.98, 1, iduration * 0.01, 0
+	ain1 = ain * kamp
+	ilength = iduration + (ifftsize / sr)
+	fanal pvsanal ain1, ifftsize, ifftsize/4, ifftsize, 1
+	ibuffer, ktim pvsbuffer fanal, ilength
+	xout ibuffer
+endop
+
+
+; play back from a spectral sampling buffer
+; aL, aR spectralsamplerplay ibuffer, ilength, ktime, kpos
+opcode spectralsamplerplay, aa, iikk
+	ibuffer, ilength, ktime, kpos xin
+	kchange changed kpos
+	aphasor, asyncout syncphasor a(ktime * ilength), a(kchange)
+	kphasor = k(aphasor) + (kpos * ilength)
+	fL pvsbufread kphasor, ibuffer
+	fR pvsbufread kphasor*0.95, ibuffer
+	aL pvsynth fL
+	aR pvsynth fR
+	xout aL, aR
+endop
+
+
+*/
+; ABOVE ARE LEGACY AND TO BE DEPRECATED
+
+
+/*
+	Spectral sampling and playback
+	
+	Can't sub-opcode the f in the a for some reason, doesn't work - so some duplication here
+*/
+
+opcode spectralsampler, f, fkkio
+	fanal, ktime, kpos, ilength, icontinuous xin
+
+	ksampling init 1
+	if (icontinuous == 1 || ksampling == 1) then
+		ibuffer, ktime pvsbuffer fanal, ilength
+		if (icontinuous == 0 && timeinsts() >= ilength) then
+			ksampling = 0
+		endif
+	endif
+
+	kchange changed kpos
+	aphasor, asyncout syncphasor a(ktime * ilength), a(kchange)
+	kphasor = k(aphasor) + (kpos * ilength)
+	fread pvsbufread kphasor, ibuffer
+	xout fread
+endop
+
+
+
+opcode spectralsampler, a, akkioo
+	ain, ktime, kpos, ilength, ifftsize, icontinuous xin
+
+	ifftsize = (ifftsize == 0) ? 1024 : ifftsize
+	ksampling init 1
+	if (icontinuous == 1 || ksampling == 1) then
+		fanal pvsanal ain, ifftsize, ifftsize/4, ifftsize, 1
+		ibuffer, ktime pvsbuffer fanal, ilength
+		if (icontinuous == 0 && timeinsts() >= ilength) then
+			ksampling = 0
+		endif
+	endif
+
+	kchange changed kpos
+	aphasor, asyncout syncphasor a(ktime * ilength), a(kchange)
+	kphasor = k(aphasor) + (kpos * ilength)
+	fread pvsbufread kphasor, ibuffer
+	aout pvsynth fread
+	xout aout
+endop
+
+
+
+opcode spectralsampler, aa, aakkioo
+	ainL, ainR, ktime, kpos, ilength, ifftsize, icontinuous xin
+
+	ifftsize = (ifftsize == 0) ? 1024 : ifftsize
+	ksampling init 1
+	if (icontinuous == 1 || ksampling == 1) then
+		fanalL pvsanal ainL, ifftsize, ifftsize/4, ifftsize, 1
+		fanalR pvsanal ainR, ifftsize, ifftsize/4, ifftsize, 1
+		ibufferL, ktime pvsbuffer fanalL, ilength
+		ibufferR, ktime pvsbuffer fanalR, ilength
+		if (icontinuous == 0 && timeinsts() >= ilength) then
+			ksampling = 0
+		endif
+	endif
+
+	kchange changed kpos
+	aphasor, asyncout syncphasor a(ktime * ilength), a(kchange)
+	kphasor = k(aphasor) + (kpos * ilength)
+	freadL pvsbufread kphasor, ibufferL
+	freadR pvsbufread kphasor, ibufferR
+	aoutL pvsynth freadL
+	aoutR pvsynth freadR
+	xout aoutL, aoutR
+endop
+
+#end
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