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/*
This LADSPA plugin provides tube distortion
(c) Fraser Stuart 2009
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <ladspa.h>
#include "libinv_common.h"
#include "inv_tube.h"
/* The port numbers for the plugin: */
#define ITUBE_DRIVE 0
#define ITUBE_DCOFFSET 1
#define ITUBE_PHASE 2
#define ITUBE_MIX 3
#define ITUBE_AUDIO_IN1 4
#define ITUBE_AUDIO_OUT1 5
#define ITUBE_AUDIO_IN2 6 /* not used in mono mode */
#define ITUBE_AUDIO_OUT2 7 /* not used in mono mode */
/* The structure used to hold port connection information and state
(actually gain controls require no further state). */
typedef struct {
unsigned long SampleRate;
/* Ports */
LADSPA_Data * ControlDrive;
LADSPA_Data * ControlDcoffset;
LADSPA_Data * ControlPhase;
LADSPA_Data * ControlMix;
LADSPA_Data * AudioInputBuffer1;
LADSPA_Data * AudioOutputBuffer1;
LADSPA_Data * AudioInputBuffer2;
LADSPA_Data * AudioOutputBuffer2;
/* params with complex conversions get remembered */
LADSPA_Data LastDrive;
LADSPA_Data LastDcoffset;
LADSPA_Data LastPhase;
LADSPA_Data LastMix;
LADSPA_Data ConvertedDrive;
LADSPA_Data ConvertedDcoffset;
LADSPA_Data ConvertedPhase;
LADSPA_Data ConvertedMix;
} Itube;
/*****************************************************************************/
/* Construct a new plugin instance. */
LADSPA_Handle instantiateItube(const LADSPA_Descriptor * Descriptor, unsigned long SampleRate) {
LADSPA_Handle Instance;
Itube * plug;
if((Instance=malloc(sizeof(Itube)))==NULL)
return NULL;
/* set some initial params */
plug = (Itube *)Instance;
/* should check SampleRate > 0 */
plug->SampleRate=SampleRate;
return Instance;
}
/*****************************************************************************/
/* Connect a port to a data location. */
void connectPortToItube(LADSPA_Handle Instance,unsigned long Port,LADSPA_Data * DataLocation) {
Itube * plug;
plug = (Itube *)Instance;
switch (Port) {
case ITUBE_DRIVE:
plug->ControlDrive = DataLocation;
break;
case ITUBE_DCOFFSET:
plug->ControlDcoffset = DataLocation;
break;
case ITUBE_PHASE:
plug->ControlPhase = DataLocation;
break;
case ITUBE_MIX:
plug->ControlMix = DataLocation;
break;
case ITUBE_AUDIO_IN1:
plug->AudioInputBuffer1 = DataLocation;
break;
case ITUBE_AUDIO_OUT1:
plug->AudioOutputBuffer1 = DataLocation;
break;
case ITUBE_AUDIO_IN2:
plug->AudioInputBuffer2 = DataLocation;
break;
case ITUBE_AUDIO_OUT2:
plug->AudioOutputBuffer2 = DataLocation;
break;
}
}
void activateItube(LADSPA_Handle Instance) {
Itube * plug;
plug = (Itube *)Instance;
/* set some defaults */
plug->LastDrive=0;
plug->LastDcoffset=0;
plug->LastPhase=0;
plug->LastMix=75;
plug->ConvertedDrive = convertParam(ITUBE_DRIVE, plug->LastDrive, plug->SampleRate);
plug->ConvertedDcoffset = convertParam(ITUBE_DCOFFSET, plug->LastDcoffset, plug->SampleRate);
plug->ConvertedPhase = convertParam(ITUBE_PHASE, plug->LastPhase, plug->SampleRate);
plug->ConvertedMix = convertParam(ITUBE_MIX, plug->LastMix, plug->SampleRate);
}
void runMonoItube(LADSPA_Handle Instance, unsigned long SampleCount) {
LADSPA_Data (*pParamFunc)(unsigned long, LADSPA_Data, unsigned long) = NULL;
LADSPA_Data * pfAudioInput1;
LADSPA_Data * pfAudioOutput1;
LADSPA_Data fAudio1, fDrive, fDCOffset, fPhase, fMix, fDCOffsetADJ;
Itube * plug;
unsigned long lSampleIndex;
plug = (Itube *)Instance;
pParamFunc = &convertParam;
/* check for any params changes */
checkParamChange(ITUBE_DRIVE, plug->ControlDrive, &(plug->LastDrive), &(plug->ConvertedDrive), plug->SampleRate, pParamFunc);
checkParamChange(ITUBE_DCOFFSET, plug->ControlDcoffset, &(plug->LastDcoffset), &(plug->ConvertedDcoffset), plug->SampleRate, pParamFunc);
checkParamChange(ITUBE_PHASE, plug->ControlPhase, &(plug->LastPhase), &(plug->ConvertedPhase), plug->SampleRate, pParamFunc);
checkParamChange(ITUBE_MIX, plug->ControlMix, &(plug->LastMix), &(plug->ConvertedMix), plug->SampleRate, pParamFunc);
fDrive = plug->ConvertedDrive;
fDCOffset = plug->ConvertedDcoffset;
fPhase = plug->ConvertedPhase;
fMix = plug->ConvertedMix;
fDCOffsetADJ = ITube(fDCOffset,fDrive);
pfAudioInput1 = plug->AudioInputBuffer1;
pfAudioOutput1 = plug->AudioOutputBuffer1;
for (lSampleIndex = 0; lSampleIndex < SampleCount; lSampleIndex++) {
fAudio1=*(pfAudioInput1++);
*(pfAudioOutput1++) = fPhase <= 0 ?
(fAudio1*(1-fMix)) + (ITube(fAudio1 + fDCOffset,fDrive)-fDCOffsetADJ)*fMix :
(fAudio1*(1-fMix)) - (ITube(fAudio1 + fDCOffset,fDrive)-fDCOffsetADJ)*fMix ;
}
}
void runStereoItube(LADSPA_Handle Instance, unsigned long SampleCount) {
LADSPA_Data (*pParamFunc)(unsigned long, LADSPA_Data, unsigned long) = NULL;
LADSPA_Data * pfAudioInput1;
LADSPA_Data * pfAudioInput2;
LADSPA_Data * pfAudioOutput1;
LADSPA_Data * pfAudioOutput2;
LADSPA_Data fAudio1, fAudio2, fDrive, fDCOffset, fPhase, fMix, fDCOffsetADJ;
Itube * plug;
unsigned long lSampleIndex;
plug = (Itube *)Instance;
pParamFunc = &convertParam;
/* check for any params changes */
checkParamChange(ITUBE_DRIVE, plug->ControlDrive, &(plug->LastDrive), &(plug->ConvertedDrive), plug->SampleRate, pParamFunc);
checkParamChange(ITUBE_DCOFFSET, plug->ControlDcoffset, &(plug->LastDcoffset), &(plug->ConvertedDcoffset), plug->SampleRate, pParamFunc);
checkParamChange(ITUBE_PHASE, plug->ControlPhase, &(plug->LastPhase), &(plug->ConvertedPhase), plug->SampleRate, pParamFunc);
checkParamChange(ITUBE_MIX, plug->ControlMix, &(plug->LastMix), &(plug->ConvertedMix), plug->SampleRate, pParamFunc);
fDrive = plug->ConvertedDrive;
fDCOffset = plug->ConvertedDcoffset;
fPhase = plug->ConvertedPhase;
fMix = plug->ConvertedMix;
fDCOffsetADJ = ITube(fDCOffset,fDrive);
pfAudioInput1 = plug->AudioInputBuffer1;
pfAudioInput2 = plug->AudioInputBuffer2;
pfAudioOutput1 = plug->AudioOutputBuffer1;
pfAudioOutput2 = plug->AudioOutputBuffer2;
for (lSampleIndex = 0; lSampleIndex < SampleCount; lSampleIndex++) {
fAudio1=*(pfAudioInput1++);
*(pfAudioOutput1++) = fPhase <= 0 ?
(fAudio1*(1-fMix)) + (ITube(fAudio1 + fDCOffset,fDrive)-fDCOffsetADJ)*fMix :
(fAudio1*(1-fMix)) - (ITube(fAudio1 + fDCOffset,fDrive)-fDCOffsetADJ)*fMix ;
fAudio2=*(pfAudioInput2++);
*(pfAudioOutput2++) = fPhase <= 0 ?
(fAudio2*(1-fMix)) + (ITube(fAudio2 + fDCOffset,fDrive)-fDCOffsetADJ)*fMix :
(fAudio2*(1-fMix)) - (ITube(fAudio2 + fDCOffset,fDrive)-fDCOffsetADJ)*fMix ;
}
}
void cleanupItube(LADSPA_Handle Instance) {
free(Instance);
}
LADSPA_Descriptor * g_psMonoTubeDescriptor = NULL;
LADSPA_Descriptor * g_psStereoTubeDescriptor = NULL;
/* _init() is called automatically when the plugin library is first
loaded. */
void _init() {
char ** pcPortNames;
LADSPA_PortDescriptor * piPortDescriptors;
LADSPA_PortRangeHint * psPortRangeHints;
g_psMonoTubeDescriptor = (LADSPA_Descriptor *)malloc(sizeof(LADSPA_Descriptor));
g_psStereoTubeDescriptor = (LADSPA_Descriptor *)malloc(sizeof(LADSPA_Descriptor));
if (g_psMonoTubeDescriptor) {
g_psMonoTubeDescriptor->UniqueID = 3306;
g_psMonoTubeDescriptor->Properties = LADSPA_PROPERTY_HARD_RT_CAPABLE;
g_psMonoTubeDescriptor->Label = strdup("invada_mono_tube_module_0_1");
g_psMonoTubeDescriptor->Name = strdup(":: Invada :: Tube - Mono");
g_psMonoTubeDescriptor->Maker = strdup("Fraser At Invada Records dot Com");
g_psMonoTubeDescriptor->Copyright = strdup("(c) Invada Records");
g_psMonoTubeDescriptor->PortCount = 6;
piPortDescriptors = (LADSPA_PortDescriptor *)calloc(6, sizeof(LADSPA_PortDescriptor));
g_psMonoTubeDescriptor->PortDescriptors = (const LADSPA_PortDescriptor *)piPortDescriptors;
piPortDescriptors[ITUBE_DRIVE] = LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL;
piPortDescriptors[ITUBE_DCOFFSET] = LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL;
piPortDescriptors[ITUBE_PHASE] = LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL;
piPortDescriptors[ITUBE_MIX] = LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL;
piPortDescriptors[ITUBE_AUDIO_IN1] = LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO;
piPortDescriptors[ITUBE_AUDIO_OUT1] = LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO;
pcPortNames = (char **)calloc(6, sizeof(char *));
g_psMonoTubeDescriptor->PortNames = (const char **)pcPortNames;
pcPortNames[ITUBE_DRIVE] = strdup("Drive (dB)");
pcPortNames[ITUBE_DCOFFSET] = strdup("DC Offset");
pcPortNames[ITUBE_PHASE] = strdup("Phase");
pcPortNames[ITUBE_MIX] = strdup("Wet/Dry Mix (%)");
pcPortNames[ITUBE_AUDIO_IN1] = strdup("Input");
pcPortNames[ITUBE_AUDIO_OUT1] = strdup("Output");
psPortRangeHints = ((LADSPA_PortRangeHint *) calloc(6, sizeof(LADSPA_PortRangeHint)));
g_psMonoTubeDescriptor->PortRangeHints = (const LADSPA_PortRangeHint *)psPortRangeHints;
psPortRangeHints[ITUBE_DRIVE].HintDescriptor = (LADSPA_HINT_BOUNDED_BELOW |
LADSPA_HINT_BOUNDED_ABOVE |
LADSPA_HINT_DEFAULT_0);
psPortRangeHints[ITUBE_DRIVE].LowerBound = 0;
psPortRangeHints[ITUBE_DRIVE].UpperBound = 18;
psPortRangeHints[ITUBE_DCOFFSET].HintDescriptor = (LADSPA_HINT_BOUNDED_BELOW |
LADSPA_HINT_BOUNDED_ABOVE |
LADSPA_HINT_DEFAULT_0 );
psPortRangeHints[ITUBE_DCOFFSET].LowerBound = -1;
psPortRangeHints[ITUBE_DCOFFSET].UpperBound = 1;
psPortRangeHints[ITUBE_PHASE].HintDescriptor = (LADSPA_HINT_TOGGLED |
LADSPA_HINT_DEFAULT_0);
psPortRangeHints[ITUBE_MIX].HintDescriptor = (LADSPA_HINT_BOUNDED_BELOW |
LADSPA_HINT_BOUNDED_ABOVE |
LADSPA_HINT_DEFAULT_HIGH );
psPortRangeHints[ITUBE_MIX].LowerBound = 0;
psPortRangeHints[ITUBE_MIX].UpperBound = 100;
psPortRangeHints[ITUBE_AUDIO_IN1].HintDescriptor = 0;
psPortRangeHints[ITUBE_AUDIO_OUT1].HintDescriptor = 0;
g_psMonoTubeDescriptor->instantiate = instantiateItube;
g_psMonoTubeDescriptor->connect_port = connectPortToItube;
g_psMonoTubeDescriptor->activate = activateItube;
g_psMonoTubeDescriptor->run = runMonoItube;
g_psMonoTubeDescriptor->run_adding = NULL;
g_psMonoTubeDescriptor->set_run_adding_gain = NULL;
g_psMonoTubeDescriptor->deactivate = NULL;
g_psMonoTubeDescriptor->cleanup = cleanupItube;
}
if (g_psStereoTubeDescriptor) {
g_psStereoTubeDescriptor->UniqueID = 3307;
g_psStereoTubeDescriptor->Properties = LADSPA_PROPERTY_HARD_RT_CAPABLE;
g_psStereoTubeDescriptor->Label = strdup("invada_stereo_tube_module_0_1");
g_psStereoTubeDescriptor->Name = strdup(":: Invada :: Tube - Stereo");
g_psStereoTubeDescriptor->Maker = strdup("Fraser At Invada Records dot Com");
g_psStereoTubeDescriptor->Copyright = strdup("(c) Invada Records");
g_psStereoTubeDescriptor->PortCount = 8;
piPortDescriptors = (LADSPA_PortDescriptor *)calloc(8, sizeof(LADSPA_PortDescriptor));
g_psStereoTubeDescriptor->PortDescriptors = (const LADSPA_PortDescriptor *)piPortDescriptors;
piPortDescriptors[ITUBE_DRIVE] = LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL;
piPortDescriptors[ITUBE_DCOFFSET] = LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL;
piPortDescriptors[ITUBE_PHASE] = LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL;
piPortDescriptors[ITUBE_MIX] = LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL;
piPortDescriptors[ITUBE_AUDIO_IN1] = LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO;
piPortDescriptors[ITUBE_AUDIO_OUT1] = LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO;
piPortDescriptors[ITUBE_AUDIO_IN2] = LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO;
piPortDescriptors[ITUBE_AUDIO_OUT2] = LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO;
pcPortNames = (char **)calloc(8, sizeof(char *));
g_psStereoTubeDescriptor->PortNames = (const char **)pcPortNames;
pcPortNames[ITUBE_DRIVE] = strdup("Drive (dB)");
pcPortNames[ITUBE_DCOFFSET] = strdup("DC Offset");
pcPortNames[ITUBE_PHASE] = strdup("Phase");
pcPortNames[ITUBE_MIX] = strdup("Wet/Dry Mix (%)");
pcPortNames[ITUBE_AUDIO_IN1] = strdup("Input (Left)");
pcPortNames[ITUBE_AUDIO_OUT1] = strdup("Output (Left)");
pcPortNames[ITUBE_AUDIO_IN2] = strdup("Input (Right)");
pcPortNames[ITUBE_AUDIO_OUT2] = strdup("Output (Right)");
psPortRangeHints = ((LADSPA_PortRangeHint *) calloc(8, sizeof(LADSPA_PortRangeHint)));
g_psStereoTubeDescriptor->PortRangeHints = (const LADSPA_PortRangeHint *)psPortRangeHints;
psPortRangeHints[ITUBE_DRIVE].HintDescriptor = (LADSPA_HINT_BOUNDED_BELOW |
LADSPA_HINT_BOUNDED_ABOVE |
LADSPA_HINT_DEFAULT_0);
psPortRangeHints[ITUBE_DRIVE].LowerBound = 0;
psPortRangeHints[ITUBE_DRIVE].UpperBound = 18;
psPortRangeHints[ITUBE_DCOFFSET].HintDescriptor = (LADSPA_HINT_BOUNDED_BELOW |
LADSPA_HINT_BOUNDED_ABOVE |
LADSPA_HINT_DEFAULT_0 );
psPortRangeHints[ITUBE_DCOFFSET].LowerBound = -1;
psPortRangeHints[ITUBE_DCOFFSET].UpperBound = 1;
psPortRangeHints[ITUBE_PHASE].HintDescriptor = (LADSPA_HINT_TOGGLED |
LADSPA_HINT_DEFAULT_0);
psPortRangeHints[ITUBE_MIX].HintDescriptor = (LADSPA_HINT_BOUNDED_BELOW |
LADSPA_HINT_BOUNDED_ABOVE |
LADSPA_HINT_DEFAULT_HIGH );
psPortRangeHints[ITUBE_MIX].LowerBound = 0;
psPortRangeHints[ITUBE_MIX].UpperBound = 100;
psPortRangeHints[ITUBE_AUDIO_IN1].HintDescriptor = 0;
psPortRangeHints[ITUBE_AUDIO_OUT1].HintDescriptor = 0;
psPortRangeHints[ITUBE_AUDIO_IN2].HintDescriptor = 0;
psPortRangeHints[ITUBE_AUDIO_OUT2].HintDescriptor = 0;
g_psStereoTubeDescriptor->instantiate = instantiateItube;
g_psStereoTubeDescriptor->connect_port = connectPortToItube;
g_psStereoTubeDescriptor->activate = activateItube;
g_psStereoTubeDescriptor->run = runStereoItube;
g_psStereoTubeDescriptor->run_adding = NULL;
g_psStereoTubeDescriptor->set_run_adding_gain = NULL;
g_psStereoTubeDescriptor->deactivate = NULL;
g_psStereoTubeDescriptor->cleanup = cleanupItube;
}
}
void deleteDescriptor(LADSPA_Descriptor * psDescriptor) {
unsigned long lIndex;
if (psDescriptor) {
free((char *)psDescriptor->Label);
free((char *)psDescriptor->Name);
free((char *)psDescriptor->Maker);
free((char *)psDescriptor->Copyright);
free((LADSPA_PortDescriptor *)psDescriptor->PortDescriptors);
for (lIndex = 0; lIndex < psDescriptor->PortCount; lIndex++)
free((char *)(psDescriptor->PortNames[lIndex]));
free((char **)psDescriptor->PortNames);
free((LADSPA_PortRangeHint *)psDescriptor->PortRangeHints);
free(psDescriptor);
}
}
/* _fini() is called automatically when the library is unloaded. */
void _fini() {
deleteDescriptor(g_psMonoTubeDescriptor);
deleteDescriptor(g_psStereoTubeDescriptor);
}
/* Return a descriptor of the requested plugin type. */
const LADSPA_Descriptor * ladspa_descriptor(unsigned long Index) {
switch (Index) {
case 0:
return g_psMonoTubeDescriptor;
case 1:
return g_psStereoTubeDescriptor;
default:
return NULL;
}
}
LADSPA_Data convertParam(unsigned long param, LADSPA_Data value, unsigned long sr) {
LADSPA_Data result;
switch(param)
{
case ITUBE_DRIVE:
if(value<0)
result= 1;
else if (value < 18)
result = pow(10,value/20.0);
else
result= pow(10,0.9);
break;
case ITUBE_DCOFFSET:
if(value<-1)
result= -1;
else if (value < 0)
result = -pow(value,2);
else if (value < 1)
result = pow(value,2);
else
result= 1;
break;
case ITUBE_PHASE:
if(value<0.5)
result= 0;
else
result= 1;
break;
case ITUBE_MIX:
if(value<0)
result= 0;
else if (value < 100)
result = value/100;
else
result= 1;
break;
default:
result=0;
break;
}
return result;
}
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