interpreter/preprocessor/faust-0.9.47mr3/architecture/dssi.cpp

   1 /************************************************************************
   2         IMPORTANT NOTE : this file contains two clearly delimited
   3         sections : the ARCHITECTURE section (in two parts) and the
   4         USER section. Each section is governed by its own copyright
   5         and license. Please check individually each section for
   6         license and copyright information.
   7 *************************************************************************/
   8
   9 /*******************BEGIN ARCHITECTURE SECTION (part 1/2)****************/
  10
  11 /************************************************************************
  12     FAUST Architecture File
  13         Copyright (C) 2011 Michael J. Wilson
  14
  15     ---------------------------------------------------------------------
  16     This Architecture section is free software; you can redistribute
  17     it and/or modify it under the terms of the GNU General Public
  18     License as published by the Free Software Foundation; either
  19     version 3 of the License, or (at your option) any later version.
  20
  21     This program is distributed in the hope that it will be useful,
  22     but WITHOUT ANY WARRANTY; without even the implied warranty of
  23     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24     GNU General Public License for more details.
  25
  26     You should have received a copy of the GNU General Public License
  27     along with this program; If not, see <http://www.gnu.org/licenses/>.
  28
  29     EXCEPTION : As a special exception, you may create a larger work
  30     that contains this FAUST architecture section and distribute that
  31     work under terms of your choice, so long as this FAUST
  32     architecture section is not modified.
  33     ---------------------------------------------------------------------
  34
  35 ************************************************************************/
  36
  37 /********************************************************************
  38  * dssi.cpp - Polyphonic dssi wrapper for the FAUST language.
  39  *
  40  * Usage: faust -a dssi.cpp myfaustprog.dsp
  41  *
  42  * By Michael J. Wilson (mwilson@alumni.caltech.edu)
  43  *
  44  * Made with reference to:
  45  *   - vsti-mono.cpp by Julius Smith (http://ccrma.stanford.edu/~jos/)
  46  *   - ladspa.cpp by GRAME, Centre National de Creation Musicale
  47  *   - karplong.cpp by Chris Cannam, Steve Harris, Sean Bolton
  48  *
  49  * Because of the inclusion of code from ladspa.cpp, this architecture
  50  * file is also released under the GNU General Public Licenses version
  51  * 3.  Sections which were taken from ladspa.cpp are clearly marked
  52  * below, in order to trace the GPL dependency.
  53  * As with faust2pd and vsti-mono.cpp, to obtain MIDI control via
  54  * NoteOn/Off, Velocity, and KeyNumber, there must be a button named
  55  * "gate" and sliders (or numeric entries) named "gain" and "freq" in
  56  * the Faust patch specified in myfaustprog.dsp.
  57  *
  58  * FAUST
  59  * Copyright (C) 2003-2007 GRAME, Centre National de Creation Musicale
  60  * http://www.grame.fr/
  61  *
  62  ********************************************************************/
  63
  64 #include "dssi.h"
  65 #include "ladspa.h"
  66
  67 #include <math.h>
  68 #include <stdlib.h>
  69 #include <string.h>
  70
  71 #include <stack>
  72 #include <string>
  73 #include <map>
  74 #include <vector>
  75 #include <list>
  76
  77 // On Intel set FZ (Flush to Zero) and DAZ (Denormals Are Zero)
  78 // flags to avoid costly denormals
  79 #ifdef __SSE__
  80     #include <xmmintrin.h>
  81     #ifdef __SSE2__
  82         #define AVOIDDENORMALS _mm_setcsr(_mm_getcsr() | 0x8040)
  83     #else
  84         #define AVOIDDENORMALS _mm_setcsr(_mm_getcsr() | 0x8000)
  85     #endif
  86 #else
  87     #warning *** dssi.cpp: NO SSE FLAG (denormals may slow things down) ***
  88     #define AVOIDDENORMALS
  89 #endif
  90
  91 struct Meta : std::map<const char*, const char*>
  92 {
  93     void declare (const char* key, const char* value) { (*this)[key]=value; }
  94 };
  95
  96 #define max(x,y) (((x)>(y)) ? (x) : (y))
  97 #define min(x,y) (((x)<(y)) ? (x) : (y))
  98
  99 #define sym(name) xsym(name)
 100 #define xsym(name) #name
 101
 102 inline int lsr (int x, int n) { return int(((unsigned int)x) >> n); }
 103 inline int int2pow2 (int x) { int r=0; while ((1<<r)<x) r++; return r; }
 104
 105 /******************************************************************************
 106 *******************************************************************************
 107
 108 VECTOR INTRINSICS
 109
 110 *******************************************************************************
 111 *******************************************************************************/
 112
 113 <<includeIntrinsic>>
 114
 115 //---------------------Abstract User Interface--------------------
 116 //
 117 // Abstract definition of a User Interface to be passed to the
 118 // buildUserInterface method of a Faust Signal Processor
 119 //
 120 //----------------------------------------------------------------
 121 class UI
 122 {
 123     bool fStopped;
 124
 125 public:
 126     UI() : fStopped(false) {}
 127     virtual ~UI() {}
 128
 129     virtual void addButton(const char* label, float* zone) = 0;
 130     virtual void addToggleButton(const char* label, float* zone) = 0;
 131     virtual void addCheckButton(const char* label, float* zone) = 0;
 132     virtual void addVerticalSlider(const char* label, float* zone, float init, float min, float max, float step) = 0;
 133     virtual void addHorizontalSlider(const char* label, float* zone, float init, float min, float max, float step) = 0;
 134     virtual void addNumEntry(const char* label, float* zone, float init, float min, float max, float step) = 0;
 135
 136     // -- passive widgets
 137     virtual void addNumDisplay(const char* label, float* zone, int precision) = 0;
 138     virtual void addTextDisplay(const char* label, float* zone, char* names[], float min, float max) = 0;
 139     virtual void addHorizontalBargraph(const char* label, float* zone, float min, float max) = 0;
 140     virtual void addVerticalBargraph(const char* label, float* zone, float min, float max) = 0;
 141
 142     // -- frames and labels
 143     virtual void openFrameBox(const char* label) = 0;
 144     virtual void openTabBox(const char* label) = 0;
 145     virtual void openHorizontalBox(const char* label) = 0;
 146     virtual void openVerticalBox(const char* label) = 0;
 147     virtual void closeBox() = 0;
 148
 149     virtual void show() = 0;
 150     virtual void run() = 0;
 151
 152     void stop()         { fStopped = true; }
 153     bool stopped()      { return fStopped; }
 154
 155     virtual void declare(float* zone, const char* key, const char* value) {}
 156 };
 157
 158 //------------------Abstract Signal Processor---------------------
 159 //
 160 //  Abstract definition of a Faust Signal Processor
 161 //
 162 //----------------------------------------------------------------
 163 class dsp
 164 {
 165 protected:
 166     int fSamplingFreq;
 167 public:
 168     dsp() {}
 169     virtual ~dsp() {}
 170     virtual int getNumInputs() = 0;
 171     virtual int getNumOutputs() = 0;
 172     virtual void buildUserInterface(UI* interface) = 0;
 173     virtual void init(int samplingRate) = 0;
 174     virtual void compute(int len, float** inputs, float** outputs)= 0;
 175 };
 176
 177 /********************END ARCHITECTURE SECTION (part 1/2)****************/
 178
 179 /**************************BEGIN USER SECTION **************************/
 180
 181 <<includeclass>>
 182
 183 /***************************END USER SECTION ***************************/
 184
 185 /*******************BEGIN ARCHITECTURE SECTION (part 2/2)***************/
 186
 187 ////////////////////////////////////////////////////////////////////////////////
 188 // Forward declarations
 189 ////////////////////////////////////////////////////////////////////////////////
 190 class Plugin;
 191 class DescriptorUI;
 192 class Voice;
 193
 194 ////////////////////////////////////////////////////////////////////////////////
 195 // Global data
 196 ////////////////////////////////////////////////////////////////////////////////
 197 // Maximum polyphony, must be at least 1 (TODO make this configurable at compile / runtime?)
 198 const int MAX_POLYPHONY = 64;
 199 // Descriptor
 200 DSSI_Descriptor* g_dssi_descriptor;
 201 // Additional data for descriptor:
 202 LADSPA_Descriptor* g_ladspa_descriptor;
 203 // Program descriptor:
 204 DSSI_Program_Descriptor g_program_descriptor;
 205
 206 // Global data for the descriptor:
 207 std::vector<LADSPA_PortDescriptor> g_port_descriptors;
 208 std::vector<LADSPA_PortRangeHint> g_port_range_hints;
 209 std::vector<const char*> g_port_names;
 210 std::string g_name;
 211
 212 ////////////////////////////////////////////////////////////////////////////////
 213 // The enclosed code is from ladspa.cpp
 214 // TODO groups of port names
 215 static const char* inames[] =
 216 {
 217     "input00", "input01", "input02", "input03", "input04",
 218     "input05", "input06", "input07", "input08", "input09",
 219     "input10", "input11", "input12", "input13", "input14",
 220     "input15", "input16", "input17", "input18", "input19",
 221     "input20", "input21", "input22", "input23", "input24",
 222     "input25", "input26", "input27", "input28", "input29",
 223     "input30", "input31", "input32", "input33", "input34",
 224     "input35", "input36", "input37", "input38", "input39"
 225 };
 226 static const char* onames[] =
 227 {
 228     "output00", "output01", "output02", "output03", "output04",
 229     "output05", "output06", "output07", "output08", "output09",
 230     "output10", "output11", "output12", "output13", "output14",
 231     "output15", "output16", "output17", "output18", "output19",
 232     "output20", "output21", "output22", "output23", "output24",
 233     "output25", "output26", "output27", "output28", "output29",
 234     "output30", "output31", "output32", "output33", "output34",
 235     "output35", "output36", "output37", "output38", "output39"
 236 };
 237 // END code from ladspa.cpp
 238 ////////////////////////////////////////////////////////////////////////////////
 239
 240 ////////////////////////////////////////////////////////////////////////////////
 241 // Global helper functions
 242 ////////////////////////////////////////////////////////////////////////////////
 243 char* get_metadata_if_exists(const char* key, const char* default_string)
 244 {
 245     // TODO probably want to free these somehow.  Currently only used for ladspa descriptor
 246     Meta meta;
 247     mydsp::metadata(&meta);
 248     if(meta.find(key) != meta.end())
 249     {
 250         return strdup(meta[key]);
 251     }
 252     else
 253     {
 254         return strdup(default_string);
 255     }
 256 }
 257
 258 ////////////////////////////////////////////////////////////////////////////////
 259 // The enclosed code is from ladspa.cpp
 260 std::string simplify(const std::string& src)
 261 {
 262     int         i=0;
 263     int         level=2;
 264     std::string dst;
 265
 266     while (src[i] ) {
 267
 268         switch (level) {
 269
 270         case 0 :
 271         case 1 :
 272         case 2 :
 273             // Skip the begin of the label "--foo-"
 274             // until 3 '-' have been read
 275             if (src[i]=='-') { level++; }
 276             break;
 277
 278         case 3 :
 279             // copy the content, but skip non alphnum
 280             // and content in parenthesis
 281             switch (src[i]) {
 282             case '(' :
 283             case '[' :
 284                 level++;
 285                 break;
 286
 287             case '-' :
 288                 dst += '-';
 289                 break;
 290
 291             default :
 292                 if (isalnum(src[i])) {
 293                     dst+= tolower(src[i]);
 294                 }
 295
 296             }
 297             break;
 298
 299         default :
 300             // here we are inside parenthesis and
 301             // we skip the content until we are back to
 302             // level 3
 303             switch (src[i]) {
 304
 305             case '(' :
 306             case '[' :
 307                 level++;
 308                 break;
 309
 310             case ')' :
 311             case ']' :
 312                 level--;
 313                 break;
 314
 315             default :
 316                 break;
 317             }
 318         }
 319         i++;
 320     }
 321     return (dst.size() > 0) ? dst :src;
 322 }
 323 // END code from ladspa.cpp
 324 ////////////////////////////////////////////////////////////////////////////////
 325
 326 ////////////////////////////////////////////////////////////////////////////////
 327 // Single voice; use multiple for polyphony
 328 ////////////////////////////////////////////////////////////////////////////////
 329 class Voice : public UI
 330 {
 331 public:
 332     Voice(int sampleRate);
 333     ~Voice();
 334
 335     // UI methods:
 336     // TODO don't hardcode these so hard maybe
 337     void setFreq(float val);
 338     void setGate(float val);
 339     void setGain(float val);
 340
 341     virtual void addButton(const char* label, float* zone);
 342     virtual void addToggleButton(const char* label, float* zone);
 343     virtual void addCheckButton(const char* label, float* zone);
 344     virtual void addVerticalSlider(const char* label, float* zone, float init, float min, float max, float step);
 345     virtual void addHorizontalSlider(const char* label, float* zone, float init, float min, float max, float step);
 346     virtual void addNumEntry(const char* label, float* zone, float init, float min, float max, float step);
 347
 348     virtual void addNumDisplay(const char* label, float* zone, int precision);
 349     virtual void addTextDisplay(const char* label, float* zone, char* names[], float min, float max);
 350     virtual void addHorizontalBargraph(const char* label, float* zone, float min, float max);
 351     virtual void addVerticalBargraph(const char* label, float* zone, float min, float max);
 352
 353     virtual void openFrameBox(const char* label);
 354     virtual void openTabBox(const char* label);
 355     virtual void openHorizontalBox(const char* label);
 356     virtual void openVerticalBox(const char* label);
 357     virtual void closeBox();
 358
 359     virtual void show();
 360     virtual void run();
 361
 362     // Internal control (to Faust DSP)
 363     std::vector<float*> m_controls;
 364
 365     // TODO maybe don't make this public eventually
 366     mydsp* m_mydsp;
 367
 368 private:
 369     // Helpers for UI building:
 370     // TODO organize this a bit better later...
 371     bool ckAnyMatch(const char* label, const char* indexName, float **zone, float* newZone);
 372     bool ckAllMatches(const char* label, float* zone);
 373     void addZone(float* zone);
 374
 375     int m_samplerate;
 376
 377     float* m_freq_zone;
 378     float* m_gate_zone;
 379     float* m_gain_zone;
 380 };
 381
 382 ////////////////////////////////////////////////////////////////////////////////
 383 // Plugin class to handle DSSI methods:
 384 ////////////////////////////////////////////////////////////////////////////////
 385 class Plugin : public UI
 386 {
 387 public:
 388     // LADSPA methods:
 389     static LADSPA_Handle instantiate(const LADSPA_Descriptor *, unsigned long);
 390     static void connectPort(LADSPA_Handle, unsigned long, LADSPA_Data *);
 391     static void activate(LADSPA_Handle);
 392     static void run(LADSPA_Handle, unsigned long);
 393     static void cleanup(LADSPA_Handle);
 394
 395     // DSSI methods:
 396     static const DSSI_Program_Descriptor* getProgram(LADSPA_Handle, unsigned long);
 397     static void selectProgram(LADSPA_Handle, unsigned long, unsigned long);
 398     static int getMidiController(LADSPA_Handle, unsigned long);
 399     static void runSynth(LADSPA_Handle, unsigned long, snd_seq_event_t *, unsigned long);
 400
 401     // UI methods:
 402     // TODO don't hardcode these so hard maybe
 403     void setFreq(float val, int voice = 0);
 404     void setGate(float val, int voice = 0);
 405     void setGain(float val, int voice = 0);
 406
 407     virtual void addButton(const char* label, float* zone);
 408     virtual void addToggleButton(const char* label, float* zone);
 409     virtual void addCheckButton(const char* label, float* zone);
 410     virtual void addVerticalSlider(const char* label, float* zone, float init, float min, float max, float step);
 411     virtual void addHorizontalSlider(const char* label, float* zone, float init, float min, float max, float step);
 412     virtual void addNumEntry(const char* label, float* zone, float init, float min, float max, float step);
 413
 414     virtual void addNumDisplay(const char* label, float* zone, int precision);
 415     virtual void addTextDisplay(const char* label, float* zone, char* names[], float min, float max);
 416     virtual void addHorizontalBargraph(const char* label, float* zone, float min, float max);
 417     virtual void addVerticalBargraph(const char* label, float* zone, float min, float max);
 418
 419     virtual void openFrameBox(const char* label);
 420     virtual void openTabBox(const char* label);
 421     virtual void openHorizontalBox(const char* label);
 422     virtual void openVerticalBox(const char* label);
 423     virtual void closeBox();
 424
 425     virtual void show();
 426     virtual void run();
 427
 428 private:
 429     Plugin(int sampleRate);
 430     ~Plugin();
 431
 432     // Helper methods:
 433     void updateControlZones();
 434     void runImpl(unsigned long, snd_seq_event_t *, unsigned long);
 435     void addSamples(int);
 436
 437     // Helpers for UI building:
 438     // TODO organize this a bit better later...
 439     bool ckAnyMatch(const char* label, const char* indexName);
 440     bool ckAllMatches(const char* label);
 441     void add_control_with_default(float default_value);
 442
 443     int m_samplerate;
 444
 445     // Voice allocation memebers (TODO maybe break voice allocator into separate class later)
 446     // Note each voice is playing
 447     std::vector<int> voice_notes;
 448     // Queue of free voices
 449     std::list<size_t> voice_free;
 450
 451     // Voices for polyphony
 452     std::vector<Voice*> m_voices;
 453
 454     // Top-level inputs (from DSSI host)
 455     std::vector<float*> m_inputs;
 456     // Top-level outputs (to DSSI host)
 457     std::vector<float*> m_outputs;
 458     // Temp vector for collecting outputs TODO this is an ugly way to do it...
 459     std::vector<std::vector<float> > m_temp_outputs;
 460     // External control (from DSSI host)
 461     std::vector<float*> m_controls;
 462
 463     // Control default values
 464     std::vector<float> m_control_defaults;
 465 };
 466
 467 ////////////////////////////////////////////////////////////////////////////////
 468 // UI class to build descriptor, analogous to ladspa.cpp's portCollector
 469 ////////////////////////////////////////////////////////////////////////////////
 470 const int ICONTROL = LADSPA_PORT_INPUT|LADSPA_PORT_CONTROL;
 471 const int OCONTROL = LADSPA_PORT_OUTPUT|LADSPA_PORT_CONTROL;
 472
 473 class DescriptorUI : public UI
 474 {
 475 public:
 476     DescriptorUI(int ins, int outs);
 477
 478     virtual void addButton(const char* label, float* zone) {
 479         if (!ckAnyMatch(label, "gate"))
 480         {
 481             addPortDescr(ICONTROL, label, LADSPA_HINT_TOGGLED);
 482         }
 483     }
 484     virtual void addToggleButton(const char* label, float* zone) {
 485         addPortDescr(ICONTROL, label, LADSPA_HINT_TOGGLED);
 486     }
 487     virtual void addCheckButton(const char* label, float* zone) {
 488         addPortDescr(ICONTROL, label, LADSPA_HINT_TOGGLED);
 489     }
 490     virtual void addVerticalSlider(const char* label, float* zone, float init, float min, float max, float step) {
 491         if (!ckAllMatches(label))
 492         {
 493             addPortDescr(ICONTROL, label, LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE, min, max);
 494         }
 495     }
 496     virtual void addHorizontalSlider(const char* label, float* zone, float init, float min, float max, float step) {
 497         if (!ckAllMatches(label))
 498         {
 499             addPortDescr(ICONTROL, label, LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE, min, max);
 500         }
 501     }
 502     virtual void addNumEntry(const char* label, float* zone, float init, float min, float max, float step) {
 503         if (!ckAllMatches(label))
 504         {
 505             addPortDescr(ICONTROL, label, LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE, min, max);
 506         }
 507     }
 508     virtual void addNumDisplay(const char* label, float* zone, int precision) {
 509         addPortDescr(OCONTROL, label, 0, -10000, +10000);
 510     }
 511     virtual void addTextDisplay(const char* label, float* zone, char* names[], float min, float max) {
 512         addPortDescr(OCONTROL, label, LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE, min, max);
 513     }
 514     virtual void addHorizontalBargraph(const char* label, float* zone, float min, float max) {
 515         addPortDescr(OCONTROL, label, LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE, min, max);
 516     }
 517     virtual void addVerticalBargraph(const char* label, float* zone, float min, float max){
 518         addPortDescr(OCONTROL, label, LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE, min, max);
 519     }
 520
 521     virtual void openFrameBox(const char* label) { openAnyBox(label); }
 522     virtual void openTabBox(const char* label) { openAnyBox(label); }
 523     virtual void openHorizontalBox(const char* label) { openAnyBox(label); }
 524     virtual void openVerticalBox(const char* label) { openAnyBox(label); }
 525
 526     virtual void closeBox() { fPrefix.pop(); }
 527
 528     virtual void show() {}
 529     virtual void run() {}
 530
 531 private:
 532     std::stack<std::string> fPrefix;
 533
 534     void addPortDescr(int type, const char* label, int hint, float min=0.0, float max=0.0);
 535
 536     void openAnyBox(const char* label);
 537
 538     bool ckAnyMatch(const char* label, const char* indexName)
 539         {
 540             // TODO do case-insensitive here...
 541             if (strcmp(label,indexName)==0)
 542             {
 543                 // Don't set values in the DescriptorUI
 544                 // TODO consolidate this later
 545                 return true;
 546             }
 547             return false;
 548         }
 549     bool ckAllMatches(const char* label)
 550         {
 551             bool result = false;
 552             result = result || ckAnyMatch(label,"gain");
 553             result = result || ckAnyMatch(label,"gate");
 554             result = result || ckAnyMatch(label,"freq");
 555             return result;
 556         }
 557 };
 558
 559 ////////////////////////////////////////////////////////////////////////////////
 560 // DescriptorUI methods
 561 ////////////////////////////////////////////////////////////////////////////////
 562 DescriptorUI::DescriptorUI(int ins, int outs)
 563 {
 564     // Note inputs and outputs
 565     for (int i = 0; i < ins; i++)
 566     {
 567         g_port_descriptors.push_back(LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO);
 568         LADSPA_PortRangeHint temp;
 569         temp.HintDescriptor = 0;
 570         temp.LowerBound = 0;
 571         temp.UpperBound = 0;
 572         g_port_range_hints.push_back(temp);
 573         g_port_names.push_back(inames[i]);
 574     }
 575     for (int j = 0; j < outs; j++)
 576     {
 577         g_port_descriptors.push_back(LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO);
 578         LADSPA_PortRangeHint temp;
 579         temp.HintDescriptor = 0;
 580         temp.LowerBound = 0;
 581         temp.UpperBound = 0;
 582         g_port_range_hints.push_back(temp);
 583         g_port_names.push_back(onames[j]);
 584     }
 585 }
 586
 587 void DescriptorUI::addPortDescr(int type, const char* label, int hint, float min, float max)
 588 {
 589 ////////////////////////////////////////////////////////////////////////////////
 590 // The enclosed code is derived from ladspa.cpp
 591     std::string fullname = simplify(fPrefix.top() + "-" + label);
 592     // TODO for debugging, I'm just using the label for now instead of the full name (since fullname can get long)
 593 //    char * str = strdup(fullname.c_str());
 594     char * str = strdup(label);
 595 // END code from ladspa.cpp
 596 ////////////////////////////////////////////////////////////////////////////////
 597
 598     g_port_descriptors.push_back(type);
 599     LADSPA_PortRangeHint temp;
 600     temp.HintDescriptor = hint;
 601     temp.LowerBound = min;
 602     temp.UpperBound = max;
 603     g_port_range_hints.push_back(temp);
 604     g_port_names.push_back(str); // TODO memory leak; need to free
 605 }
 606
 607 void DescriptorUI::openAnyBox(const char* label)
 608 {
 609 ////////////////////////////////////////////////////////////////////////////////
 610 // The enclosed code is from ladspa.cpp
 611     if (fPrefix.size() == 0)
 612     {
 613         // top level label is used as plugin name
 614         g_name = label;
 615         fPrefix.push(label);
 616     }
 617     else
 618     {
 619         std::string s;
 620         if (label && label[0])
 621         {
 622             s = fPrefix.top() + "-" + label;
 623         }
 624         else
 625         {
 626             s = fPrefix.top();
 627         }
 628         fPrefix.push(s);
 629     }
 630 // END code from ladspa.cpp
 631 ////////////////////////////////////////////////////////////////////////////////
 632 }
 633
 634 ////////////////////////////////////////////////////////////////////////////////
 635 // Plugin methods
 636 ////////////////////////////////////////////////////////////////////////////////
 637 Plugin::Plugin(int sampleRate) :
 638     m_samplerate(sampleRate)
 639 {
 640     int i;
 641
 642     mydsp temp_mydsp;
 643
 644     for (i = 0; i < MAX_POLYPHONY; i++)
 645     {
 646         m_voices.push_back(new Voice(m_samplerate));
 647
 648         // Voice parameters:
 649         voice_free.push_back(i);
 650         // TODO using -1 to represent nothing; think of a more clear way to do this
 651         voice_notes.push_back(-1);
 652     }
 653     for (i = 0; i < temp_mydsp.getNumInputs(); i++)
 654     {
 655         m_inputs.push_back(0);
 656     }
 657     for (i = 0; i < temp_mydsp.getNumOutputs(); i++)
 658     {
 659         m_outputs.push_back(0);
 660         std::vector<float> temp;
 661         temp.push_back(0.0);
 662         m_temp_outputs.push_back(temp);
 663     }
 664 }
 665
 666 Plugin::~Plugin()
 667 {
 668     size_t i;
 669     for (i = 0; i < m_voices.size(); i++)
 670     {
 671         delete m_voices[i];
 672     }
 673 }
 674
 675 LADSPA_Handle Plugin::instantiate(const LADSPA_Descriptor *, unsigned long rate)
 676 {
 677     Plugin *plugin = new Plugin(rate);
 678     size_t i;
 679
 680     mydsp* temp_mydsp = new mydsp();
 681     temp_mydsp->buildUserInterface(plugin);
 682     delete temp_mydsp;
 683
 684     for (i = 0; i < plugin->m_voices.size(); i++)
 685     {
 686         plugin->m_voices[i]->m_mydsp->buildUserInterface(plugin->m_voices[i]);
 687     }
 688     return plugin;
 689 }
 690
 691 void Plugin::connectPort(LADSPA_Handle handle, unsigned long port, LADSPA_Data *location)
 692 {
 693     Plugin *plugin = (Plugin *)handle;
 694
 695     // Map inputs, then outputs, then controls:
 696     if (port < plugin->m_inputs.size())
 697     {
 698         *(&plugin->m_inputs[port]) = (float *)location;
 699     }
 700     else if (port < plugin->m_inputs.size() + plugin->m_outputs.size())
 701     {
 702         *(&plugin->m_outputs[port - plugin->m_inputs.size()]) = (float *)location;
 703     }
 704     else
 705     {
 706         plugin->m_controls[port - plugin->m_inputs.size() - plugin->m_outputs.size()] = (float *)location;
 707     }
 708 }
 709
 710 void Plugin::activate(LADSPA_Handle handle)
 711 {
 712     Plugin *plugin = (Plugin *)handle;
 713     for (size_t i = 0; i < plugin->m_voices.size(); i++)
 714     {
 715         plugin->m_voices[i]->m_mydsp->init(plugin->m_samplerate);
 716     }
 717 }
 718
 719 void Plugin::run(LADSPA_Handle handle, unsigned long samples)
 720 {
 721     runSynth(handle, samples, 0, 0);
 722 }
 723
 724 void Plugin::cleanup(LADSPA_Handle handle)
 725 {
 726     delete (Plugin *)handle;
 727 }
 728
 729 const DSSI_Program_Descriptor* Plugin::getProgram(LADSPA_Handle handle, unsigned long index)
 730 {
 731     if (index == 0)
 732     {
 733         return &g_program_descriptor;
 734     }
 735     else
 736     {
 737         return NULL;
 738     }
 739 }
 740
 741 void Plugin::selectProgram(LADSPA_Handle handle, unsigned long bank, unsigned long program)
 742 {
 743     Plugin *plugin = (Plugin *)handle;
 744     for (size_t i = 0; i < plugin->m_controls.size(); i++)
 745     {
 746         *(plugin->m_controls[i]) = plugin->m_control_defaults[i];
 747     }
 748 }
 749
 750 int Plugin::getMidiController(LADSPA_Handle, unsigned long port)
 751 {
 752     // TODO this is where we need to map MIDI controllers to ports
 753     return DSSI_NONE;
 754 }
 755
 756 void Plugin::updateControlZones()
 757 {
 758     for (size_t i = 0; i < m_controls.size(); i++)
 759     {
 760         for (size_t j = 0; j < m_voices.size(); j++)
 761         {
 762             *(m_voices[j]->m_controls[i]) = *(m_controls[i]);
 763         }
 764     }
 765 }
 766
 767 void Plugin::runSynth(LADSPA_Handle handle, unsigned long samples, snd_seq_event_t *events, unsigned long eventCount)
 768 {
 769     Plugin *plugin = (Plugin *)handle;
 770     plugin->updateControlZones();
 771     plugin->runImpl(samples, events, eventCount);
 772 }
 773
 774 void Plugin::runImpl(unsigned long sampleCount, snd_seq_event_t *events, unsigned long eventCount)
 775 {
 776     unsigned long pos;
 777     unsigned long count;
 778     unsigned long eventPos;
 779     snd_seq_ev_note_t n;
 780
 781     size_t voice_index;
 782
 783     pos = 0;
 784     eventPos = 0;
 785     while (pos < sampleCount)
 786     {
 787         while ((eventPos < eventCount) &&
 788                (pos >= events[eventPos].time.tick))
 789         {
 790             switch (events[eventPos].type)
 791             {
 792             case SND_SEQ_EVENT_NOTEON:
 793                 n = events[eventPos].data.note;
 794                 if (n.velocity > 0)
 795                 {
 796                     // Look for the next free voice:
 797                     if (!voice_free.empty())
 798                     {
 799                         // Get the index of the first free string and remove it from the list
 800                         voice_index = voice_free.front();
 801                         voice_free.pop_front();
 802
 803                         // Play the note on that voice
 804                         voice_notes[voice_index] = n.note;
 805                         float freq = 440.0f * powf(2.0f,(((float)n.note)-69.0f)/12.0f);
 806                         float gain = n.velocity/127.0f;
 807                         setFreq(freq, voice_index); // Hz - requires Faust control-signal "freq"
 808                         setGain(gain, voice_index); // 0-1 - requires Faust control-signal "gain"
 809                         setGate(1.0f, voice_index); // 0 or 1 - requires Faust button-signal "gate"
 810                     }
 811                 }
 812                 break;
 813             case SND_SEQ_EVENT_NOTEOFF:
 814                 for (voice_index = 0; voice_index < voice_notes.size(); voice_index++)
 815                 {
 816                     if (voice_notes[voice_index] == events[eventPos].data.note.note)
 817                     {
 818                         setGate(0, voice_index);
 819                         // TODO using -1 to represent nothing; think of a more clear way to do this
 820                         voice_notes[voice_index] = -1;
 821                         voice_free.push_back(voice_index);
 822                     }
 823                 }
 824                 break;
 825             default:
 826                 break;
 827             }
 828             ++eventPos;
 829         }
 830
 831         if ((eventPos < eventCount) && (events[eventPos].time.tick < sampleCount))
 832         {
 833             count = events[eventPos].time.tick - pos;
 834         }
 835         else
 836         {
 837             count = sampleCount - pos;
 838         }
 839
 840         addSamples(count);
 841         pos += count;
 842     }
 843 }
 844
 845 void Plugin::addSamples(int samples)
 846 {
 847     size_t i;
 848     int j;
 849     size_t v;
 850
 851     // TODO this isn't very efficient right now...
 852
 853     // Grow temp buffers to appropriate size / zero them:
 854     for (i = 0; i < m_temp_outputs.size(); i++)
 855     {
 856         for (j = 0; j < samples; j++)
 857         {
 858             if (m_temp_outputs[i].size() < (j+1))
 859             {
 860                 m_temp_outputs[i].push_back(0.0);
 861             }
 862             else
 863             {
 864                 m_temp_outputs[i][j] = 0.0;
 865             }
 866         }
 867     }
 868
 869     AVOIDDENORMALS;
 870
 871     // Add all voices together
 872     for (v = 0; v < m_voices.size(); v++)
 873     {
 874         m_voices[v]->m_mydsp->compute(samples, &m_inputs[0], &m_outputs[0]);
 875
 876         // Accumulate in temp buffer
 877         for (i = 0; i < m_outputs.size(); i++)
 878         {
 879             for (j = 0; j < samples; j++)
 880             {
 881                 m_temp_outputs[i][j] += m_outputs[i][j];
 882             }
 883         }
 884     }
 885
 886     // Transfer accumulator to actual outputs
 887     for (i = 0; i < m_outputs.size(); i++)
 888     {
 889         for (j = 0; j < samples; j++)
 890         {
 891             // TODO find a better way to protect against clipping.
 892             m_outputs[i][j] = m_temp_outputs[i][j] / (float)MAX_POLYPHONY;
 893         }
 894     }
 895 }
 896
 897 void Plugin::setFreq(float val, int voice)
 898 {
 899     m_voices[voice]->setFreq(val);
 900 }
 901
 902 void Plugin::setGate(float val, int voice)
 903 {
 904     m_voices[voice]->setGate(val);
 905 }
 906
 907 void Plugin::setGain(float val, int voice)
 908 {
 909     m_voices[voice]->setGain(val);
 910 }
 911
 912 void Plugin::addButton(const char* label, float* zone)
 913 {
 914     if (!ckAnyMatch(label, "gate"))
 915     {
 916         add_control_with_default(0);
 917     }
 918 }
 919
 920 void Plugin::addToggleButton(const char* label, float* zone)
 921 {
 922     add_control_with_default(0);
 923 }
 924
 925 void Plugin::addCheckButton(const char* label, float* zone)
 926 {
 927     add_control_with_default(0);
 928 }
 929
 930 void Plugin::addVerticalSlider(const char* label, float* zone, float init, float min, float max, float step)
 931 {
 932     if (!ckAllMatches(label))
 933     {
 934         add_control_with_default(init);
 935     }
 936 }
 937 void Plugin::addHorizontalSlider(const char* label, float* zone, float init, float min, float max, float step)
 938 {
 939     if (!ckAllMatches(label))
 940     {
 941         add_control_with_default(init);
 942     }
 943 }
 944 void Plugin::addNumEntry(const char* label, float* zone, float init, float min, float max, float step)
 945 {
 946     if (!ckAllMatches(label))
 947     {
 948         add_control_with_default(init);
 949     }
 950 }
 951
 952 void Plugin::addNumDisplay(const char* label, float* zone, int precision)
 953 {
 954     add_control_with_default(0);
 955 }
 956 void Plugin::addTextDisplay(const char* label, float* zone, char* names[], float min, float max)
 957 {
 958     add_control_with_default(0);
 959 }
 960 void Plugin::addHorizontalBargraph(const char* label, float* zone, float min, float max)
 961 {
 962     add_control_with_default(min);
 963 }
 964 void Plugin::addVerticalBargraph(const char* label, float* zone, float min, float max)
 965 {
 966     add_control_with_default(min);
 967 }
 968
 969 void Plugin::openFrameBox(const char* label)
 970 {
 971 }
 972 void Plugin::openTabBox(const char* label)
 973 {
 974 }
 975 void Plugin::openHorizontalBox(const char* label)
 976 {
 977 }
 978 void Plugin::openVerticalBox(const char* label)
 979 {
 980 }
 981 void Plugin::closeBox()
 982 {
 983 }
 984
 985 void Plugin::show()
 986 {
 987 }
 988 void Plugin::run()
 989 {
 990 }
 991
 992 bool Plugin::ckAnyMatch(const char* label, const char* indexName)
 993 {
 994     // TODO do case-insensitive here...
 995     if (strcmp(label,indexName)==0)
 996     {
 997         return true;
 998     }
 999     return false;
1000 }
1001 bool Plugin::ckAllMatches(const char* label)
1002 {
1003     bool result = false;
1004     result = result || ckAnyMatch(label,"gain");
1005     result = result || ckAnyMatch(label,"gate");
1006     result = result || ckAnyMatch(label,"freq");
1007     return result;
1008 }
1009 void Plugin::add_control_with_default(float default_value)
1010 {
1011     // TODO may need to consider different things for input and output controls...
1012     m_controls.push_back(0);
1013     m_control_defaults.push_back(default_value);
1014 }
1015
1016
1017 ////////////////////////////////////////////////////////////////////////////////
1018 // Voice methods
1019 ////////////////////////////////////////////////////////////////////////////////
1020 Voice::Voice(int sampleRate) :
1021     m_samplerate(sampleRate),
1022     m_freq_zone(0),
1023     m_gate_zone(0),
1024     m_gain_zone(0)
1025 {
1026     m_mydsp = new mydsp();
1027 }
1028
1029 Voice::~Voice()
1030 {
1031     delete m_mydsp;
1032 }
1033
1034 void Voice::setFreq(float val)
1035 {
1036     if (m_freq_zone)
1037     {
1038         *m_freq_zone = val;
1039     }
1040 }
1041
1042 void Voice::setGate(float val)
1043 {
1044     if (m_gate_zone)
1045     {
1046         *m_gate_zone = val;
1047     }
1048 }
1049
1050 void Voice::setGain(float val)
1051 {
1052     if (m_gain_zone)
1053     {
1054         *m_gain_zone = val;
1055     }
1056 }
1057
1058 void Voice::addButton(const char* label, float* zone)
1059 {
1060     if (!ckAnyMatch(label, "gate", &m_gate_zone, zone))
1061     {
1062         addZone(zone);
1063     }
1064 }
1065
1066 void Voice::addToggleButton(const char* label, float* zone)
1067 {
1068     addZone(zone);
1069 }
1070
1071 void Voice::addCheckButton(const char* label, float* zone)
1072 {
1073     addZone(zone);
1074 }
1075
1076 void Voice::addVerticalSlider(const char* label, float* zone, float init, float min, float max, float step)
1077 {
1078     if (!ckAllMatches(label, zone))
1079     {
1080         addZone(zone);
1081     }
1082 }
1083 void Voice::addHorizontalSlider(const char* label, float* zone, float init, float min, float max, float step)
1084 {
1085     if (!ckAllMatches(label, zone))
1086     {
1087         addZone(zone);
1088     }
1089 }
1090 void Voice::addNumEntry(const char* label, float* zone, float init, float min, float max, float step)
1091 {
1092     if (!ckAllMatches(label, zone))
1093     {
1094         addZone(zone);
1095     }
1096 }
1097
1098 void Voice::addNumDisplay(const char* label, float* zone, int precision)
1099 {
1100     addZone(zone);
1101 }
1102 void Voice::addTextDisplay(const char* label, float* zone, char* names[], float min, float max)
1103 {
1104     addZone(zone);
1105 }
1106 void Voice::addHorizontalBargraph(const char* label, float* zone, float min, float max)
1107 {
1108     addZone(zone);
1109 }
1110 void Voice::addVerticalBargraph(const char* label, float* zone, float min, float max)
1111 {
1112     addZone(zone);
1113 }
1114
1115 void Voice::openFrameBox(const char* label)
1116 {
1117 }
1118 void Voice::openTabBox(const char* label)
1119 {
1120 }
1121 void Voice::openHorizontalBox(const char* label)
1122 {
1123 }
1124 void Voice::openVerticalBox(const char* label)
1125 {
1126 }
1127 void Voice::closeBox()
1128 {
1129 }
1130
1131 void Voice::show()
1132 {
1133 }
1134 void Voice::run()
1135 {
1136 }
1137
1138 bool Voice::ckAnyMatch(const char* label, const char* indexName, float **zone, float* newZone)
1139 {
1140     // TODO do case-insensitive here...
1141     if (strcmp(label,indexName)==0)
1142     {
1143         *zone = newZone;
1144         return true;
1145     }
1146     return false;
1147 }
1148 bool Voice::ckAllMatches(const char* label, float* zone)
1149 {
1150     bool result = false;
1151     result = result || ckAnyMatch(label,"gain", &m_gain_zone, zone);
1152     result = result || ckAnyMatch(label,"gate", &m_gate_zone, zone);
1153     result = result || ckAnyMatch(label,"freq", &m_freq_zone, zone);
1154     return result;
1155 }
1156 void Voice::addZone(float* zone)
1157 {
1158     m_controls.push_back(zone);
1159 }
1160
1161
1162 ////////////////////////////////////////////////////////////////////////////////
1163 // Shared object hooks
1164 ////////////////////////////////////////////////////////////////////////////////
1165 extern "C"
1166 {
1167
1168 #ifdef __GNUC__
1169     __attribute__((constructor)) void init(void)
1170 #else
1171     void _init(void)
1172 #endif
1173     {
1174         AVOIDDENORMALS;
1175
1176         if (g_dssi_descriptor == 0)
1177         {
1178             g_ladspa_descriptor = new LADSPA_Descriptor();
1179             g_dssi_descriptor = new DSSI_Descriptor();
1180
1181             mydsp* temp_mydsp = new mydsp();
1182             DescriptorUI* temp_descriptor_ui = new DescriptorUI(temp_mydsp->getNumInputs(), temp_mydsp->getNumOutputs());
1183             temp_mydsp->buildUserInterface(temp_descriptor_ui);
1184
1185             // Fill the descriptors:
1186             // TODO figure out strdup with const strings
1187             g_ladspa_descriptor->UniqueID = 0;
1188             g_ladspa_descriptor->Label = get_metadata_if_exists("name", g_name.c_str());
1189             g_ladspa_descriptor->Properties = LADSPA_PROPERTY_HARD_RT_CAPABLE;
1190             g_ladspa_descriptor->Name = get_metadata_if_exists("name", g_name.c_str());
1191             g_ladspa_descriptor->Maker = get_metadata_if_exists("author", "Maker");
1192             g_ladspa_descriptor->Copyright = get_metadata_if_exists("copyright", "Copyright");
1193             g_ladspa_descriptor->PortCount = g_port_descriptors.size();
1194             g_ladspa_descriptor->PortDescriptors = &g_port_descriptors[0];
1195             g_ladspa_descriptor->PortNames = &g_port_names[0];
1196             g_ladspa_descriptor->PortRangeHints = &g_port_range_hints[0];
1197             g_ladspa_descriptor->ImplementationData = 0;
1198             g_ladspa_descriptor->instantiate = Plugin::instantiate;
1199             g_ladspa_descriptor->connect_port = Plugin::connectPort;
1200             g_ladspa_descriptor->activate = Plugin::activate;
1201             g_ladspa_descriptor->run = Plugin::run;
1202             g_ladspa_descriptor->run_adding = 0;
1203             g_ladspa_descriptor->set_run_adding_gain = 0;
1204             g_ladspa_descriptor->deactivate = 0;
1205             g_ladspa_descriptor->cleanup = Plugin::cleanup;
1206
1207             g_dssi_descriptor->DSSI_API_Version = 1;
1208             g_dssi_descriptor->LADSPA_Plugin = g_ladspa_descriptor;
1209             g_dssi_descriptor->configure = 0;
1210             g_dssi_descriptor->get_program = Plugin::getProgram;
1211             g_dssi_descriptor->select_program = Plugin::selectProgram;
1212             g_dssi_descriptor->get_midi_controller_for_port = Plugin::getMidiController;
1213             g_dssi_descriptor->run_synth = Plugin::runSynth;
1214             g_dssi_descriptor->run_synth_adding = 0;
1215             g_dssi_descriptor->run_multiple_synths = 0;
1216             g_dssi_descriptor->run_multiple_synths_adding = 0;
1217
1218             // Program description (TODO if we eventually support multiple programs we will need to handle this differently)
1219             g_program_descriptor.Bank = 0;
1220             g_program_descriptor.Program = 0;
1221             g_program_descriptor.Name = get_metadata_if_exists("name", g_name.c_str());
1222
1223             delete temp_mydsp;
1224             delete temp_descriptor_ui;
1225         }
1226     }
1227
1228 #ifdef __GNUC__
1229     __attribute__((destructor)) void fini(void)
1230 #else
1231     void _fini()
1232 #endif
1233     {
1234         if (g_ladspa_descriptor)
1235         {
1236             delete g_ladspa_descriptor;
1237         }
1238         if (g_dssi_descriptor)
1239         {
1240             delete g_dssi_descriptor;
1241         }
1242     }
1243
1244     const LADSPA_Descriptor *ladspa_descriptor(unsigned long index)
1245     {
1246         return 0;
1247     }
1248
1249     const DSSI_Descriptor *dssi_descriptor(unsigned long index)
1250     {
1251         if (index == 0)
1252         {
1253             return g_dssi_descriptor;
1254         }
1255         else
1256         {
1257             return NULL;
1258         }
1259     }
1260 }
1261
1262 /********************END ARCHITECTURE SECTION (part 2/2)****************/