From 8a2c2824a59d7644e13bc52c9a0ecbd641f21f95 Mon Sep 17 00:00:00 2001 From: Robert Jonsson Date: Wed, 13 Oct 2010 19:34:22 +0000 Subject: new branch muse2, first checkin --- muse2/plugins/freeverb/Makefile.am | 17 + muse2/plugins/freeverb/Makefile.in | 672 ++++++++++++++++++++++++++++++++++++ muse2/plugins/freeverb/allpass.h | 50 +++ muse2/plugins/freeverb/comb.h | 66 ++++ muse2/plugins/freeverb/denormals.h | 28 ++ muse2/plugins/freeverb/freeverb.cpp | 166 +++++++++ muse2/plugins/freeverb/readme.txt | 147 ++++++++ muse2/plugins/freeverb/revmodel.cpp | 232 +++++++++++++ muse2/plugins/freeverb/revmodel.h | 79 +++++ muse2/plugins/freeverb/tuning.h | 60 ++++ 10 files changed, 1517 insertions(+) create mode 100644 muse2/plugins/freeverb/Makefile.am create mode 100644 muse2/plugins/freeverb/Makefile.in create mode 100644 muse2/plugins/freeverb/allpass.h create mode 100644 muse2/plugins/freeverb/comb.h create mode 100644 muse2/plugins/freeverb/denormals.h create mode 100644 muse2/plugins/freeverb/freeverb.cpp create mode 100644 muse2/plugins/freeverb/readme.txt create mode 100644 muse2/plugins/freeverb/revmodel.cpp create mode 100644 muse2/plugins/freeverb/revmodel.h create mode 100644 muse2/plugins/freeverb/tuning.h (limited to 'muse2/plugins/freeverb') diff --git a/muse2/plugins/freeverb/Makefile.am b/muse2/plugins/freeverb/Makefile.am new file mode 100644 index 00000000..81dbec2d --- /dev/null +++ b/muse2/plugins/freeverb/Makefile.am @@ -0,0 +1,17 @@ +include $(top_srcdir)/common.am +include $(top_srcdir)/plugins/plugins-install.am + +AM_CXXFLAGS += -O3 -fno-exceptions -fno-rtti -ffast-math + +plugins_LTLIBRARIES = freeverb.la + +plugins_DATA = + +freeverb_la_SOURCES = \ + freeverb.cpp \ + revmodel.cpp revmodel.h \ + allpass.h comb.h denormals.h tuning.h +freeverb_la_LDFLAGS = -module -avoid-version + +EXTRA_DIST = readme.txt + diff --git a/muse2/plugins/freeverb/Makefile.in b/muse2/plugins/freeverb/Makefile.in new file mode 100644 index 00000000..394c9cbd --- /dev/null +++ b/muse2/plugins/freeverb/Makefile.in @@ -0,0 +1,672 @@ +# Makefile.in generated by automake 1.11.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, +# Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + + +VPATH = @srcdir@ +pkgdatadir = $(datadir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkglibexecdir = $(libexecdir)/@PACKAGE@ +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd 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$(top_srcdir)/muse/widgets -o $@ $< + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/muse2/plugins/freeverb/allpass.h b/muse2/plugins/freeverb/allpass.h new file mode 100644 index 00000000..4eb1c1a0 --- /dev/null +++ b/muse2/plugins/freeverb/allpass.h @@ -0,0 +1,50 @@ +// Allpass filter declaration +// +// Written by Jezar at Dreampoint, June 2000 +// http://www.dreampoint.co.uk +// This code is public domain + +#ifndef _allpass_ +#define _allpass_ +#include "denormals.h" + +//--------------------------------------------------------- +// allpass +//--------------------------------------------------------- + +class allpass + { + float feedback; + float *buffer; + int bufsize; + int bufidx; + + public: + allpass() { bufidx = 0; } + void setbuffer(float *buf, int size) { + buffer = buf; + bufsize = size; + } + float process(float input) { + float bufout = buffer[bufidx]; + undenormalise(bufout); + float output = -input + bufout; + buffer[bufidx] = input + (bufout*feedback); + if (++bufidx >= bufsize) + bufidx = 0; +// bufidx = ++bufidx % bufsize; + return output; + } + void mute() { + for (int i=0; i= bufsize) + bufidx = 0; +// bufidx = ++bufidx % bufsize; + return output; + } + void mute() { + for (int i=0; iport[port] = data; + } + +//--------------------------------------------------------- +// activate +//--------------------------------------------------------- + +void activate(LADSPA_Handle instance) + { + ((Revmodel *)instance)->activate(); + } + +//--------------------------------------------------------- +// deactivate +//--------------------------------------------------------- + +void deactivate(LADSPA_Handle /*Instance*/) + { + } + +//--------------------------------------------------------- +// runFreeverb +//--------------------------------------------------------- + +void run(LADSPA_Handle Instance, unsigned long n) + { + ((Revmodel*)Instance)->processreplace(n); + } + +//--------------------------------------------------------- +// runAddingFreeverb +// *ADD* the output to the output buffer. +//--------------------------------------------------------- + +void runAdding(LADSPA_Handle Instance, unsigned long n) + { + ((Revmodel*)Instance)->processmix(n); + } + +//--------------------------------------------------------- +// setFreeverbRunAddingGain +//--------------------------------------------------------- + +void setGain(LADSPA_Handle /*Instance*/, LADSPA_Data /*Gain*/) + { +// ((Freeverb *)Instance)->m_fRunAddingGain = Gain; + } + +//--------------------------------------------------------- +// cleanupFreeverb +//--------------------------------------------------------- + +void cleanup(LADSPA_Handle Instance) + { + delete (Revmodel *)Instance; + } + +static const char* portNames[] = { + "Input (Left)", + "Input (Right)", + "Output (Left)", + "Output (Right)", + "Room Size", + "Damping", + "Wet Level", + }; + +LADSPA_PortDescriptor portDescriptors[] = { + LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO, + LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO, + LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO, + LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO, + LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL, + LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL, + LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL, + }; + +LADSPA_PortRangeHint portRangeHints[] = { + { 0, 0.0, 0.0 }, + { 0, 0.0, 0.0 }, + { 0, 0.0, 0.0 }, + { 0, 0.0, 0.0 }, + { LADSPA_HINT_BOUNDED_ABOVE | LADSPA_HINT_BOUNDED_BELOW, 0.0, 1.0 }, + { LADSPA_HINT_BOUNDED_ABOVE | LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_LOGARITHMIC, 0.0, 1.0 }, + { LADSPA_HINT_BOUNDED_ABOVE | LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_LOGARITHMIC, 0.0, 1.0 }, + }; + +LADSPA_Descriptor descriptor = { + 1050, + "freeverb1", + LADSPA_PROPERTY_HARD_RT_CAPABLE, + "Freeverb", + "Werner Schweer", + "None", + 7, + portDescriptors, + portNames, + portRangeHints, + 0, // impl. data + instantiate, + connect, + activate, + run, + runAdding, + setGain, + deactivate, + cleanup + }; + +//--------------------------------------------------------- +// _init +// called automatically when the plugin library is first +// loaded. +//--------------------------------------------------------- + +void _init() + { + } + +//--------------------------------------------------------- +// _fini +// called automatically when the library is unloaded. +//--------------------------------------------------------- + +void _fini() + { + } + +//--------------------------------------------------------- +// ladspa_descriptor +// Return a descriptor of the requested plugin type. +//--------------------------------------------------------- + +const LADSPA_Descriptor* ladspa_descriptor(unsigned long i) + { + return (i == 0) ? &descriptor : 0; + } + diff --git a/muse2/plugins/freeverb/readme.txt b/muse2/plugins/freeverb/readme.txt new file mode 100644 index 00000000..2c1349a3 --- /dev/null +++ b/muse2/plugins/freeverb/readme.txt @@ -0,0 +1,147 @@ +readme from original freeverb-source: +============================================== + + +Freeverb - Free, studio-quality reverb SOURCE CODE in the public domain +----------------------------------------------------------------------- + +Written by Jezar at Dreampoint - http://www.dreampoint.co.uk + + +Introduction +------------ + +Hello. + +I'll try to keep this "readme" reasonably small. +There are few things in the world that I hate more than long "readme" files. +Except "coding conventions" - but more on that later... + +In this zip file you will find two folders of C++ source code: + +"Components" - Contains files that should clean-compile + ON ANY TYPE OF COMPUTER OR SYSTEM WHATSOEVER. It should not be necessary + to make ANY changes to these files to get them to compile, except to make + up for inadequacies of certain compilers. These files create three classes + - a comb filter, an allpass filter, and a reverb model made up of a number + of instances of the filters, with some features to control the filters at + a macro level. You will need to link these classes into another program that + interfaces with them. The files in the components drawer are completely + independant, and can be built without dependancies on anything else. + Because of the simple interface, it should be possible to interface + these files to any system - VST, DirectX, anything - without changing + them AT ALL. + +"FreeverbVST" - Contains a Steinberg VST implementation of this version of + Freeverb, using the components in (surprise) the components folder. + It was built on a PC but may compile properly for the Macintosh with + no problems. I don't know - I don't have a Macintosh. If you've + figured out how to compile the examples in the Steinberg VST + Development Kit, then you should easilly figure out how to bring the + files into a project and get it working in a few minutes. It should + be very simple. + +Note that this version of Freeverb doesn't contain predelay, or any EQ. +I thought that might make it difficult to understand the "reverb" part of +the code. Once you figure out how Freeverb works, you should find it trivial +to add such features with little CPU overhead. + +Also, the code in this version of Freeverb has been optimised. This has changed +the sound *slightly*, but not significantly compared to how much processing +power it saves. + +Finally, note that there is also a built copy of this version of Freeverb called +"Freeverb3.dll" - this is a VST plugin for the PC. If you want a version for +the Mac or anything else, then you'll need to build it yourself from the code. + + +Technical Explanation +--------------------- + +Freeverb is a simple implementation of the standard Schroeder/Moorer reverb +model. I guess the only reason why it sounds better than other reverbs, +is simply because I spent a long while doing listening tests in order to create +the values found in "tuning.h". It uses 8 comb filters on both the left and right +channels), and you might possibly be able to get away with less if CPU power +is a serious constraint for you. It then feeds the result of the reverb through +4 allpass filters on both the left and right channels. These "smooth" the sound. +Adding more than four allpasses doesn't seem to add anything significant +to the sound, and if you use less, the sound gets a bit "grainy". +The filters on the right channel are slightly detuned compared to the left channel +in order to create a stereo effect. + +Hopefully, you should find the code in the components drawer a model of +brevity and clarity. Notice that I don't use any "coding conventions". +Personally, I think that coding conventions suck. They are meant to make +the code "clearer", but they inevitably do the complete opposite, making +the code completely unfathomable. Anyone whose done Windows programming +with its - frankly stupid - "Hungarian notation" will know exactly what +I mean. Coding conventions typically promote issues that are irrelevant +up to the status of appearing supremely important. It may have helped back +people in the days when compilers where somewhat feeble in their type-safety, +but not in the new millenium with advanced C++ compilers. + +Imagine if we rewrote the English language to conform to coding conventions. +After all, The arguments should be just as valid for the English language as +they are for a computer language. For example, we could put a lower-case "n" +in front of every noun, a lower-case "p" in front of a persons name, +a lower-case "v" in front of every verb, and a lower-case "a" in front +of every adjective. Can you imagine what the English language would look like? +All in the name of "clarity". It's just as stupid to do this for computer +code as it would be to do it for the English language. I hope that the +code for Freeverb in the components drawer demonstrates this, and helps start +a movement back towards sanity in coding practices. + + +Background +---------- + +Why is the Freeverb code now public domain? Simple. I only intended to create +Freeverb to provide me and my friends with studio-quality reverb for free. +I never intended to make any money out of it. However, I simply do not have the +time to develop it any further. I'm working on a "concept album" at the moment, +and I'll never finish it if I spend any more time programming. + +In any case, I make more far money as a contract programmer - making Mobile +Internet products - than I ever could writing plugins, so it simply doesn't +make financial sense for me to spend any more time on it. + +Rather than give Freeverb to any particular individual or organisation +to profit from it, I've decided to give it away to the internet community +at large, so that quality, FREE (or at the very least, low-cost) reverbs can +be developed for all platforms. + +Feel free to use the source code for Freeverb in any of your own products, +whether they are also available for free, or even if they are commercial - +I really don't mind. You may do with the code whatever you wish. If you use +it in a product (whether commercial or not), it would be very nice of you, +if you were to send me a copy of your product - although I appreciate that +this isn't always possible in all circumstances. + +HOWEVER, please don't bug me with questions about how to use this code. +I gave away Freeverb because I don't have time to maintain it. That means +I *certainly* don't have time to answer questions about the source code, so +please don't email questions to me. I *will* ignore them. If you can't figure +the code for Freeverb out - then find somebody who can. I hope that either +way, you enjoy experimenting with it. + + +Disclaimer +---------- + +This software and source code is given away for free, without any warranties +of any kind. It has been given away to the internet community as a free gift, +so please treat it in the same spirit. + + +I hope this code is useful and interesting to you all! +I hope you have lots of fun experimenting with it and make good products! + +Very best regards, +Jezar. +Technology Consultant +Dreampoint Design and Engineering +http://www.dreampoint.co.uk + + +//ends diff --git a/muse2/plugins/freeverb/revmodel.cpp b/muse2/plugins/freeverb/revmodel.cpp new file mode 100644 index 00000000..c72ee22b --- /dev/null +++ b/muse2/plugins/freeverb/revmodel.cpp @@ -0,0 +1,232 @@ +// Reverb model implementation +// +// Written by Jezar at Dreampoint, June 2000 +// http://www.dreampoint.co.uk +// This code is public domain + +#include +#include "revmodel.h" + +//--------------------------------------------------------- +// Revmodel +//--------------------------------------------------------- + +Revmodel::Revmodel() + { + // Tie the components to their buffers + combL[0].setbuffer(bufcombL1,combtuningL1); + combR[0].setbuffer(bufcombR1,combtuningR1); + combL[1].setbuffer(bufcombL2,combtuningL2); + combR[1].setbuffer(bufcombR2,combtuningR2); + combL[2].setbuffer(bufcombL3,combtuningL3); + combR[2].setbuffer(bufcombR3,combtuningR3); + combL[3].setbuffer(bufcombL4,combtuningL4); + combR[3].setbuffer(bufcombR4,combtuningR4); + combL[4].setbuffer(bufcombL5,combtuningL5); + combR[4].setbuffer(bufcombR5,combtuningR5); + combL[5].setbuffer(bufcombL6,combtuningL6); + combR[5].setbuffer(bufcombR6,combtuningR6); + combL[6].setbuffer(bufcombL7,combtuningL7); + combR[6].setbuffer(bufcombR7,combtuningR7); + combL[7].setbuffer(bufcombL8,combtuningL8); + combR[7].setbuffer(bufcombR8,combtuningR8); + allpassL[0].setbuffer(bufallpassL1,allpasstuningL1); + allpassR[0].setbuffer(bufallpassR1,allpasstuningR1); + allpassL[1].setbuffer(bufallpassL2,allpasstuningL2); + allpassR[1].setbuffer(bufallpassR2,allpasstuningR2); + allpassL[2].setbuffer(bufallpassL3,allpasstuningL3); + allpassR[2].setbuffer(bufallpassR3,allpasstuningR3); + allpassL[3].setbuffer(bufallpassL4,allpasstuningL4); + allpassR[3].setbuffer(bufallpassR4,allpasstuningR4); + + // Set default values + allpassL[0].setfeedback(0.5f); + allpassR[0].setfeedback(0.5f); + allpassL[1].setfeedback(0.5f); + allpassR[1].setfeedback(0.5f); + allpassL[2].setfeedback(0.5f); + allpassR[2].setfeedback(0.5f); + allpassL[3].setfeedback(0.5f); + allpassR[3].setfeedback(0.5f); + + param[0] = initialroom; + param[1] = initialdamp; + param[2] = initialwet; + + setroomsize(initialroom); + setdamp(initialdamp); + setwidth(initialwidth); + setmode(initialmode); + + // Buffer will be full of rubbish - so we MUST mute them + + for (int i = 0; i < numcombs; i++) { + combL[i].mute(); + combR[i].mute(); + } + for (int i=0;i= freezemode) { + roomsize1 = 1; + damp1 = 0; + gain = muted; + } + else { + roomsize1 = roomsize; + damp1 = damp; + gain = fixedgain; + } + + for (int i = 0; i < numcombs; i++) { + combL[i].setfeedback(roomsize1); + combR[i].setfeedback(roomsize1); + } + + for (int i = 0; i < numcombs; i++) { + combL[i].setdamp(damp1); + combR[i].setdamp(damp1); + } + } + +// The following get/set functions are not inlined, because +// speed is never an issue when calling them, and also +// because as you develop the reverb model, you may +// wish to take dynamic action when they are called. + +void Revmodel::setroomsize(float value) + { + roomsize = (value*scaleroom) + offsetroom; + update(); + } + +float Revmodel::getroomsize() + { + return (roomsize-offsetroom)/scaleroom; + } + +void Revmodel::setdamp(float value) + { + damp = value*scaledamp; + update(); + } + +void Revmodel::setwidth(float value) + { + width = value; + update(); + } + +void Revmodel::setmode(float value) + { + mode = value; + update(); + } + +float Revmodel::getmode() + { + return (mode >= freezemode) ? 1 : 0; + } diff --git a/muse2/plugins/freeverb/revmodel.h b/muse2/plugins/freeverb/revmodel.h new file mode 100644 index 00000000..bfa1f0b3 --- /dev/null +++ b/muse2/plugins/freeverb/revmodel.h @@ -0,0 +1,79 @@ +// Reverb model declaration +// +// Written by Jezar at Dreampoint, June 2000 +// http://www.dreampoint.co.uk +// This code is public domain + +#ifndef _revmodel_ +#define _revmodel_ + +#include "comb.h" +#include "allpass.h" +#include "tuning.h" +#include "../../muse/ladspa.h" + +//--------------------------------------------------------- +// Revmodel +//--------------------------------------------------------- + +class Revmodel { + float gain; + float roomsize,roomsize1; + float damp,damp1; + float width; + float mode; + + // Comb filters + comb combL[numcombs]; + comb combR[numcombs]; + + // Allpass filters + allpass allpassL[numallpasses]; + allpass allpassR[numallpasses]; + + // Buffers for the combs + float bufcombL1[combtuningL1]; + float bufcombR1[combtuningR1]; + float bufcombL2[combtuningL2]; + float bufcombR2[combtuningR2]; + float bufcombL3[combtuningL3]; + float bufcombR3[combtuningR3]; + float bufcombL4[combtuningL4]; + float bufcombR4[combtuningR4]; + float bufcombL5[combtuningL5]; + float bufcombR5[combtuningR5]; + float bufcombL6[combtuningL6]; + float bufcombR6[combtuningR6]; + float bufcombL7[combtuningL7]; + float bufcombR7[combtuningR7]; + float bufcombL8[combtuningL8]; + float bufcombR8[combtuningR8]; + + // Buffers for the allpasses + float bufallpassL1[allpasstuningL1]; + float bufallpassR1[allpasstuningR1]; + float bufallpassL2[allpasstuningL2]; + float bufallpassR2[allpasstuningR2]; + float bufallpassL3[allpasstuningL3]; + float bufallpassR3[allpasstuningR3]; + float bufallpassL4[allpasstuningL4]; + float bufallpassR4[allpasstuningR4]; + void update(); + + public: + LADSPA_Data* port[7]; + float param[3]; + + Revmodel(); + void processmix(long numsamples); + void processreplace(long numsamples); + void setroomsize(float value); + float getroomsize(); + void setdamp(float value); + void setwidth(float value); + void setmode(float value); + float getmode(); + void activate(); + }; + +#endif diff --git a/muse2/plugins/freeverb/tuning.h b/muse2/plugins/freeverb/tuning.h new file mode 100644 index 00000000..ced89252 --- /dev/null +++ b/muse2/plugins/freeverb/tuning.h @@ -0,0 +1,60 @@ +// Reverb model tuning values +// +// Written by Jezar at Dreampoint, June 2000 +// http://www.dreampoint.co.uk +// This code is public domain + +#ifndef _tuning_ +#define _tuning_ + +const int numcombs = 8; +const int numallpasses = 4; +const float muted = 0; +const float fixedgain = 0.015f; +const float scalewet = 3; +const float scaledry = 2; +const float scaledamp = 0.4f; +const float scaleroom = 0.28f; +const float offsetroom = 0.7f; +const float initialroom = 0.5f; +const float initialdamp = 0.5f; +const float initialwet = 1/scalewet; +const float initialdry = 0; +const float initialwidth = 1; +const float initialmode = 0; +const float freezemode = 0.5f; +const int stereospread = 23; + +// These values assume 44.1KHz sample rate +// they will probably be OK for 48KHz sample rate +// but would need scaling for 96KHz (or other) sample rates. +// The values were obtained by listening tests. +const int combtuningL1 = 1116; +const int combtuningR1 = 1116+stereospread; +const int combtuningL2 = 1188; +const int combtuningR2 = 1188+stereospread; +const int combtuningL3 = 1277; +const int combtuningR3 = 1277+stereospread; +const int combtuningL4 = 1356; +const int combtuningR4 = 1356+stereospread; +const int combtuningL5 = 1422; +const int combtuningR5 = 1422+stereospread; +const int combtuningL6 = 1491; +const int combtuningR6 = 1491+stereospread; +const int combtuningL7 = 1557; +const int combtuningR7 = 1557+stereospread; +const int combtuningL8 = 1617; +const int combtuningR8 = 1617+stereospread; +const int allpasstuningL1 = 556; +const int allpasstuningR1 = 556+stereospread; +const int allpasstuningL2 = 441; +const int allpasstuningR2 = 441+stereospread; +const int allpasstuningL3 = 341; +const int allpasstuningR3 = 341+stereospread; +const int allpasstuningL4 = 225; +const int allpasstuningR4 = 225+stereospread; + +#endif//_tuning_ + +//ends + -- cgit v1.2.3