diff options
Diffstat (limited to 'src/mdaAmbience.cpp')
| -rw-r--r-- | src/mdaAmbience.cpp | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/src/mdaAmbience.cpp b/src/mdaAmbience.cpp new file mode 100644 index 0000000..35d205c --- /dev/null +++ b/src/mdaAmbience.cpp @@ -0,0 +1,275 @@ +#include "mdaAmbience.h" + +#include <stdio.h> +#include <float.h> +#include <math.h> + +AudioEffect *createEffectInstance(audioMasterCallback audioMaster) +{ + return new mdaAmbience(audioMaster); +} + +mdaAmbience::mdaAmbience(audioMasterCallback audioMaster) : AudioEffectX(audioMaster, 1, 4) // programs, parameters +{ + //inits here! + fParam0 = 0.7f; //size + fParam1 = 0.7f; //hf + fParam2 = 0.9f; //mix + fParam3 = 0.5f; //output + + buf1 = new float[1024]; + buf2 = new float[1024]; + buf3 = new float[1024]; + buf4 = new float[1024]; + + fil = 0.0f; + den = pos=0; + + setNumInputs(2); + setNumOutputs(2); + setUniqueID("mdaA"); // identify here + DECLARE_LVZ_DEPRECATED(canMono) (); + canProcessReplacing(); + strcpy(programName, "Small Space Ambience"); + + suspend(); // flush buffer + setParameter(0, 0.7f); //go and set initial values! +} + +void mdaAmbience::setParameter(LvzInt32 index, float value) +{ + float tmp; + + switch(index) + { + case 0: fParam0 = value; break; + case 1: fParam1 = value; break; + case 2: fParam2 = value; break; + case 3: fParam3 = value; break; + } + //calcs here + fbak = 0.8f; + damp = 0.05f + 0.9f * fParam1; + tmp = (float)pow(10.0f, 2.0f * fParam3 - 1.0f); + dry = tmp - fParam2 * fParam2 * tmp; + wet = (0.4f + 0.4f) * fParam2 * tmp; + + tmp = 0.025f + 2.665f * fParam0; + if(size!=tmp) rdy=0; //need to flush buffer + size = tmp; +} + +mdaAmbience::~mdaAmbience() +{ + if(buf1) delete [] buf1; + if(buf2) delete [] buf2; + if(buf3) delete [] buf3; + if(buf4) delete [] buf4; +} + +bool mdaAmbience::getProductString(char* text) { strcpy(text, "mda Ambience"); return true; } +bool mdaAmbience::getVendorString(char* text) { strcpy(text, "mda"); return true; } +bool mdaAmbience::getEffectName(char* name) { strcpy(name, "Ambience"); return true; } + +void mdaAmbience::suspend() +{ + memset(buf1, 0, 1024 * sizeof(float)); + memset(buf2, 0, 1024 * sizeof(float)); + memset(buf3, 0, 1024 * sizeof(float)); + memset(buf4, 0, 1024 * sizeof(float)); + rdy = 1; +} + +void mdaAmbience::setProgramName(char *name) +{ + strcpy(programName, name); +} + +void mdaAmbience::getProgramName(char *name) +{ + strcpy(name, programName); +} + +float mdaAmbience::getParameter(LvzInt32 index) +{ + float v=0; + + switch(index) + { + case 0: v = fParam0; break; + case 1: v = fParam1; break; + case 2: v = fParam2; break; + case 3: v = fParam3; break; + } + return v; +} + +void mdaAmbience::getParameterName(LvzInt32 index, char *label) +{ + switch(index) + { + case 0: strcpy(label, "Size"); break; + case 1: strcpy(label, "HF Damp"); break; + case 2: strcpy(label, "Mix"); break; + case 3: strcpy(label, "Output"); break; + } +} + +void mdaAmbience::getParameterDisplay(LvzInt32 index, char *text) +{ + switch(index) + { + case 0: sprintf(text, "%.0f", 10.0f * fParam0); break; + case 1: sprintf(text, "%.0f", 100.0f * fParam1); break; + case 2: sprintf(text, "%.0f", 100.0f * fParam2); break; + case 3: sprintf(text, "%.0f", 40.0f * fParam3 - 20.0f); break; + } +} + +void mdaAmbience::getParameterLabel(LvzInt32 index, char *label) +{ + switch(index) + { + case 0: strcpy(label, "m"); break; + case 1: strcpy(label, "%"); break; + case 2: strcpy(label, "%"); break; + case 3: strcpy(label, "dB"); break; + } +} + +//-------------------------------------------------------------------------------- +// process + +void mdaAmbience::process(float **inputs, float **outputs, LvzInt32 sampleFrames) +{ + float *in1 = inputs[0]; + float *in2 = inputs[1]; + float *out1 = outputs[0]; + float *out2 = outputs[1]; + float a, b, c, d, r; + float t, f=fil, fb=fbak, dmp=damp, y=dry, w=wet; + long p=pos, d1, d2, d3, d4; + + if(rdy==0) suspend(); + + d1 = (p + (long)(107 * size)) & 1023; + d2 = (p + (long)(142 * size)) & 1023; + d3 = (p + (long)(277 * size)) & 1023; + d4 = (p + (long)(379 * size)) & 1023; + + --in1; + --in2; + --out1; + --out2; + + while(--sampleFrames >= 0) + { + a = *++in1; + b = *++in2; + c = out1[1]; + d = out2[1]; //process from here... + + f += dmp * (w * (a + b) - f); //HF damping + r = f; + + t = *(buf1 + p); + r -= fb * t; + *(buf1 + d1) = r; //allpass + r += t; + + t = *(buf2 + p); + r -= fb * t; + *(buf2 + d2) = r; //allpass + r += t; + + t = *(buf3 + p); + r -= fb * t; + *(buf3 + d3) = r; //allpass + r += t; + c += y * a + r - f; //left output + + t = *(buf4 + p); + r -= fb * t; + *(buf4 + d4) = r; //allpass + r += t; + d += y * b + r - f; //right output + + ++p &= 1023; + ++d1 &= 1023; + ++d2 &= 1023; + ++d3 &= 1023; + ++d4 &= 1023; + + *++out1 = c; + *++out2 = d; + } + pos=p; + if(fabs(f)>1.0e-10) { fil=f; den=0; } //catch denormals + else { fil=0.0f; if(den==0) { den=1; suspend(); } } +} + +void mdaAmbience::processReplacing(float **inputs, float **outputs, LvzInt32 sampleFrames) +{ + float *in1 = inputs[0]; + float *in2 = inputs[1]; + float *out1 = outputs[0]; + float *out2 = outputs[1]; + float a, b, r; + float t, f=fil, fb=fbak, dmp=damp, y=dry, w=wet; + long p=pos, d1, d2, d3, d4; + + if(rdy==0) suspend(); + + d1 = (p + (long)(107 * size)) & 1023; + d2 = (p + (long)(142 * size)) & 1023; + d3 = (p + (long)(277 * size)) & 1023; + d4 = (p + (long)(379 * size)) & 1023; + + --in1; + --in2; + --out1; + --out2; + + while(--sampleFrames >= 0) + { + a = *++in1; + b = *++in2; + + f += dmp * (w * (a + b) - f); //HF damping + r = f; + + t = *(buf1 + p); + r -= fb * t; + *(buf1 + d1) = r; //allpass + r += t; + + t = *(buf2 + p); + r -= fb * t; + *(buf2 + d2) = r; //allpass + r += t; + + t = *(buf3 + p); + r -= fb * t; + *(buf3 + d3) = r; //allpass + r += t; + a = y * a + r - f; //left output + + t = *(buf4 + p); + r -= fb * t; + *(buf4 + d4) = r; //allpass + r += t; + b = y * b + r - f; //right output + + ++p &= 1023; + ++d1 &= 1023; + ++d2 &= 1023; + ++d3 &= 1023; + ++d4 &= 1023; + + *++out1 = a; + *++out2 = b; + } + pos=p; + if(fabs(f)>1.0e-10) { fil=f; den=0; } //catch denormals + else { fil=0.0f; if(den==0) { den=1; suspend(); } } +} |