1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319
|
////////////////////////////////////////////////////////////////////////
// This file is part of the SndObj library
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Copyright (c)Victor Lazzarini, 1997-2004
// See License.txt for a disclaimer of all warranties
// and licensing information
//////////////////////////////////////////////////
// SyncGrain implementation
// VL, 2002
//
//////////////////////////////////////////////////
#include "SyncGrain.h"
SyncGrain::SyncGrain(){
m_table = 0; // wavetable
m_envtable = 0; // envelope table
m_amp = 1.f; // overall amp
m_inputamp =0;
m_fr = 440.f; // fundamental freq
m_inputfr = 0;
m_pitch = 1.f; // grain pitch
m_inputpitch = 0;
m_grsize = 0.f; // size of grains (msecs)
m_inputgrsize = 0;
m_olaps = 100; // max number of streams (overlaps)
m_point = 0;
if(!(m_index = new double[m_olaps])){
m_error = 11;
return; // index into wavetable
}
if(!(m_envindex = new double[m_olaps])){
m_error = 11;
return;
} // index into envtable
if(!(m_streamon = new short[m_olaps])){
m_error = 11;
return;
}
m_count = 0; // sampling period counter
m_numstreams = 0; // curr num of streams
m_firststream = 0; // streams index (first stream)
m_tablesize = 0; // size of wavetable
m_envtablesize = 0; // size of envtable
for(int i = 0; i < m_olaps; i++) {
m_streamon[i] = 0;
m_index[i] = m_envindex[i] = 0.f;
}
m_start = 0.f;
m_frac = 0.f;
AddMsg("frequency", 21);
AddMsg("grain size", 22);
AddMsg("grain pitch", 23);
AddMsg("pointer rate", 24);
AddMsg("amplitude", 25);
AddMsg("source table", 26);
AddMsg("envelope table", 27);
}
SyncGrain::SyncGrain(Table* wavetable, Table* envtable, float fr, float amp,
float pitch, float grsize, float prate, SndObj* inputfr,
SndObj* inputamp, SndObj* inputpitch,
SndObj* inputgrsize, int olaps,
int vecsize, float sr):
SndObj(inputfr, vecsize, sr){
m_table = wavetable; // wavetable
m_envtable = envtable; // envelope table
m_amp = amp; // overall amp
m_inputamp = inputamp;
m_fr = fr; // fundamental freq
m_inputfr = inputfr;
m_pitch = pitch; // grain pitch
m_inputpitch = inputpitch;
m_grsize = grsize; // size of grains (msecs)
m_inputgrsize = inputgrsize;
m_olaps = olaps; // max number of streams (overlaps)
if(!(m_index = new double[m_olaps])){
m_error = 11;
return; // index into wavetable
}
if(!(m_envindex = new double[m_olaps])){
m_error = 11;
return;
} // index into envtable
if(!(m_streamon = new short[m_olaps])){
m_error = 11;
return;
}
m_count = 0xFFFFFFFF; // sampling period counter
m_numstreams = 0; // curr num of streams
m_firststream = 0; // streams index (first stream)
m_tablesize = m_table->GetLen(); // size of wavetable
m_envtablesize = m_envtable->GetLen(); // size of envtable
for(int i = 0; i < olaps; i++){
m_streamon[i] = 0;
m_index[i] = m_envindex[i] = 0.;
}
m_start = 0.f;
m_point = prate;
m_frac = 0.f;
AddMsg("frequency", 21);
AddMsg("grain size", 22);
AddMsg("grain pitch", 23);
AddMsg("pointer rate", 24);
AddMsg("amplitude", 25);
AddMsg("source table", 26);
AddMsg("envelope table", 27);
}
SyncGrain::~SyncGrain(){
// perform any necessary de-allocation etc
// here
delete[] m_index;
delete[] m_envindex;
delete[] m_streamon;
}
int
SyncGrain::Set(char* mess, float value){
switch (FindMsg(mess)){
case 21:
SetFreq(value);
return 1;
case 22:
SetGrainSize(value);
return 1;
case 23:
SetPitch(value);
return 1;
case 24:
SetPointerRate(value);
return 1;
case 25:
SetAmp(value);
return 1;
default:
return SndObj::Set(mess,value);
}
}
int
SyncGrain::Connect(char* mess, void* input){
switch (FindMsg(mess)){
case 21:
m_inputfr = (SndObj *) input;
return 1;
case 22:
m_inputgrsize = (SndObj *) input;
return 1;
case 23:
m_inputpitch = (SndObj *) input;
return 1;
case 25:
m_inputamp = (SndObj *) input;
return 1;
case 26:
m_table = (Table *) input;
return 1;
case 27:
m_envtable = (Table *) input;
return 1;
default:
return SndObj::Connect(mess, input);
}
}
short
SyncGrain::DoProcess(){
if(!m_error){
float sig, pitch, amp, grsize, envincr, period;
for(m_vecpos = 0; m_vecpos < m_vecsize; m_vecpos++) {
if(m_enable) {
// set the control parameters
// (amp, fund period, grain pitch and size, in samples)
sig = 0.f;
pitch = m_pitch + (m_inputpitch ? m_inputpitch->Output(m_vecpos) : 0);
period = m_frac + m_sr/(m_fr + (m_inputfr ? m_inputfr->Output(m_vecpos) : 0));
amp = m_amp + (m_inputamp ? m_inputamp->Output(m_vecpos) : 0);
grsize = (m_sr *
(m_grsize + (m_inputgrsize ? m_inputgrsize->Output(m_vecpos) : 0)));
envincr = m_envtablesize/grsize;
// if a grain has finished, clean up
if((!m_streamon[m_firststream]) && (m_numstreams) ){
m_numstreams--; // decrease the no of streams
m_firststream=(m_firststream+1)%m_olaps; // first stream is the next
}
// if a fund period has elapsed
// start a new grain
if(m_count >= period){
m_frac = m_count - period; // frac part to be accummulated
int newstream =(m_firststream+m_numstreams)%m_olaps;
m_streamon[newstream] = 1; // turn the stream on
m_envindex[newstream] = 0.f;
m_index[newstream] = m_start;
m_numstreams++; // increase the stream count
m_count = 0;
m_start += m_point*grsize;
while (m_start > m_tablesize) m_start-=m_tablesize;
while (m_start < 0) m_start += m_tablesize;
}
for(int i=m_numstreams,
j=m_firststream; i; i--, j=(j+1)%m_olaps){
// modulus
while(m_index[j] > m_tablesize)
m_index[j] -= m_tablesize;
while(m_index[j] < 0)
m_index[j] += m_tablesize;
// sum all the grain streams
sig += m_table->GetTable()[Ftoi(m_index[j])]
*m_envtable->GetTable()[Ftoi(m_envindex[j])];
// increment the indexes
// for each grain
m_index[j] += pitch;
m_envindex[j] += envincr;
// if the envelope is finished
// the grain is also finished
if(m_envindex[j] > m_envtablesize)
m_streamon[j] = 0;
}
// increment the period counter
m_count++;
// scale the output
m_output[m_vecpos] = sig*amp;
}
else m_output[m_vecpos] = 0.f;
}
return 1;
}
else return 0;
}
char*
SyncGrain::ErrorMessage(){
char* message;
switch(m_error){
// handle your error codes here
case 11:
message = "Memory allocation error\n";
break;
default:
message = SndObj::ErrorMessage();
break;
}
return message;
}
|