falkTX
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Carla
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Add simple audio-gain plugin 

Closes #683
tags/v2.1-rc1
falkTX 5 years ago
parent
a1f759bcc8
commit
7c25288384
4 changed files with 350 additions and 2 deletions
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  1. +1
    -0
      source/native-plugins/Makefile
  2. +4
    -2
      source/native-plugins/_all.c
  3. +32
    -0
      source/native-plugins/_data.cpp
  4. +313
    -0
      source/native-plugins/audio-gain.c

+ 1
- 0
source/native-plugins/Makefile View File

@@ -25,6 +25,7 @@ TARGETS = $(MODULEDIR)/$(MODULENAME).a
OBJS = \
$(OBJDIR)/_all.c.o \
$(OBJDIR)/_data.cpp.o \
$(OBJDIR)/audio-gain.c.o \
$(OBJDIR)/bypass.c.o \
$(OBJDIR)/lfo.c.o \
$(OBJDIR)/midi-channel-filter.c.o \


+ 4
- 2
source/native-plugins/_all.c View File

@@ -1,6 +1,6 @@
/*
* Carla Native Plugins
* Copyright (C) 2012-2018 Filipe Coelho <falktx@falktx.com>
* Copyright (C) 2012-2019 Filipe Coelho <falktx@falktx.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
@@ -21,6 +21,7 @@
// --------------------------------------------------------------------------------------------------------------------

// Simple plugins
extern void carla_register_native_plugin_audiogain(void);
extern void carla_register_native_plugin_bypass(void);
extern void carla_register_native_plugin_lfo(void);
extern void carla_register_native_plugin_midichanfilter(void);
@@ -57,6 +58,7 @@ void carla_register_all_native_external_plugins(void);
void carla_register_all_native_plugins(void)
{
// Simple plugins
carla_register_native_plugin_audiogain();
carla_register_native_plugin_bypass();
carla_register_native_plugin_lfo();
carla_register_native_plugin_midichanfilter();
@@ -85,7 +87,7 @@ void carla_register_all_native_plugins(void)
#endif // HAVE_PYQT

#ifdef HAVE_EXTERNAL_PLUGINS
// Experimental plugins
// External plugins
carla_register_all_native_external_plugins();
#endif
}


+ 32
- 0
source/native-plugins/_data.cpp View File

@@ -32,6 +32,38 @@ static const NativePluginDescriptor sNativePluginDescriptors[] = {
// --------------------------------------------------------------------------------------------------------------------
// Simple plugins

{
/* category */ NATIVE_PLUGIN_CATEGORY_UTILITY,
/* hints */ NATIVE_PLUGIN_IS_RTSAFE,
/* supports */ NATIVE_PLUGIN_SUPPORTS_NOTHING,
/* audioIns */ 1,
/* audioOuts */ 1,
/* midiIns */ 0,
/* midiOuts */ 0,
/* paramIns */ 1,
/* paramOuts */ 0,
/* name */ "Audio Gain (Mono)",
/* label */ "audiogain",
/* maker */ "falkTX",
/* copyright */ "GNU GPL v2+",
DESCFUNCS
},
{
/* category */ NATIVE_PLUGIN_CATEGORY_UTILITY,
/* hints */ NATIVE_PLUGIN_IS_RTSAFE,
/* supports */ NATIVE_PLUGIN_SUPPORTS_NOTHING,
/* audioIns */ 2,
/* audioOuts */ 2,
/* midiIns */ 0,
/* midiOuts */ 0,
/* paramIns */ 3,
/* paramOuts */ 0,
/* name */ "Audio Gain (Stereo)",
/* label */ "audiogain_s",
/* maker */ "falkTX",
/* copyright */ "GNU GPL v2+",
DESCFUNCS
},
{
/* category */ NATIVE_PLUGIN_CATEGORY_NONE,
/* hints */ NATIVE_PLUGIN_IS_RTSAFE,


+ 313
- 0
source/native-plugins/audio-gain.c View File

@@ -0,0 +1,313 @@
/*
* Carla Native Plugins
* Copyright (C) 2012-2019 Filipe Coelho <falktx@falktx.com>
*
* 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 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.
*
* For a full copy of the GNU General Public License see the doc/GPL.txt file.
*/

#include "CarlaNative.h"
#include "CarlaMIDI.h"

#include <stdlib.h>
#include <string.h>

// -----------------------------------------------------------------------

typedef enum {
// all versions
PARAM_GAIN = 0,
PARAM_COUNT_MONO,

// stereo version
PARAM_APPLY_LEFT = PARAM_COUNT_MONO,
PARAM_APPLY_RIGHT,
PARAM_COUNT_STEREO
} AudioGainParams;

typedef struct {
float gain;
bool isMono;
bool applyLeft;
bool applyRight;
} AudioGainHandle;

// -----------------------------------------------------------------------

static NativePluginHandle audiogain_instantiate(const NativeHostDescriptor* host, const bool isMono)
{
AudioGainHandle* const handle = (AudioGainHandle*)malloc(sizeof(AudioGainHandle));

if (handle == NULL)
return NULL;

handle->gain = 1.0f;
handle->isMono = isMono;
handle->applyLeft = true;
handle->applyRight = true;
return handle;

// unused
(void)host;
}

static NativePluginHandle audiogain_instantiate_mono(const NativeHostDescriptor* host)
{
return audiogain_instantiate(host, true);
}

static NativePluginHandle audiogain_instantiate_stereo(const NativeHostDescriptor* host)
{
return audiogain_instantiate(host, false);
}

#define handlePtr ((AudioGainHandle*)handle)

static void audiogain_cleanup(NativePluginHandle handle)
{
free(handlePtr);
}

static uint32_t audiogain_get_parameter_count(NativePluginHandle handle)
{
return handlePtr->isMono ? PARAM_COUNT_MONO : PARAM_COUNT_STEREO;
}

static const NativeParameter* audiogain_get_parameter_info(NativePluginHandle handle, uint32_t index)
{
if (index > (handlePtr->isMono ? PARAM_COUNT_MONO : PARAM_COUNT_STEREO))
return NULL;

static NativeParameter param;

param.hints = NATIVE_PARAMETER_IS_ENABLED|NATIVE_PARAMETER_IS_AUTOMABLE;
param.unit = NULL;
param.scalePointCount = 0;
param.scalePoints = NULL;

switch (index)
{
case PARAM_GAIN:
param.name = "Gain";
param.ranges.def = 1.0f;
param.ranges.min = 0.0f;
param.ranges.max = 4.0f;
param.ranges.step = PARAMETER_RANGES_DEFAULT_STEP;
param.ranges.stepSmall = PARAMETER_RANGES_DEFAULT_STEP_SMALL;
param.ranges.stepLarge = PARAMETER_RANGES_DEFAULT_STEP_LARGE;
break;
case PARAM_APPLY_LEFT:
param.name = "Apply Left";
param.hints |= NATIVE_PARAMETER_IS_BOOLEAN;
param.ranges.def = 1.0f;
param.ranges.min = 0.0f;
param.ranges.max = 1.0f;
param.ranges.step = 1.0f;
param.ranges.stepSmall = 1.0f;
param.ranges.stepLarge = 1.0f;
break;
case PARAM_APPLY_RIGHT:
param.name = "Apply Right";
param.hints |= NATIVE_PARAMETER_IS_BOOLEAN;
param.ranges.def = 1.0f;
param.ranges.min = 0.0f;
param.ranges.max = 1.0f;
param.ranges.step = 1.0f;
param.ranges.stepSmall = 1.0f;
param.ranges.stepLarge = 1.0f;
break;
}

return &param;
}

static float audiogain_get_parameter_value(NativePluginHandle handle, uint32_t index)
{
switch (index)
{
case PARAM_GAIN:
return handlePtr->gain;
case PARAM_APPLY_LEFT:
return handlePtr->applyLeft ? 1.0f : 0.0f;
case PARAM_APPLY_RIGHT:
return handlePtr->applyRight ? 1.0f : 0.0f;
default:
return 0.0f;
}
}

static void audiogain_set_parameter_value(NativePluginHandle handle, uint32_t index, float value)
{
switch (index)
{
case PARAM_GAIN:
handlePtr->gain = value;
break;
case PARAM_APPLY_LEFT:
handlePtr->applyLeft = (value >= 0.5f);
break;
case PARAM_APPLY_RIGHT:
handlePtr->applyRight = (value >= 0.5f);
break;
}
}

static void handle_audio_buffers(const float* inBuffer, float* outBuffer, const float gain, const uint32_t frames)
{
/*
if (gain == 0.0f)
{
memset(outBuffer, 0, sizeof(float)*frames);
}
else if (gain == 1.0f)
{
if (outBuffer != inBuffer)
memcpy(outBuffer, inBuffer, sizeof(float)*frames);
}
else
*/
{
for (uint32_t i=0; i < frames; ++i)
*outBuffer++ = *inBuffer++ * gain;
}
}

static void audiogain_process(NativePluginHandle handle,
const float** inBuffer, float** outBuffer, uint32_t frames,
const NativeMidiEvent* midiEvents, uint32_t midiEventCount)
{
const float gain = handlePtr->gain;
const bool applyLeft = handlePtr->applyLeft;
const bool applyRight = handlePtr->applyRight;
const bool isMono = handlePtr->isMono;

handle_audio_buffers(inBuffer[0], outBuffer[0], (isMono || applyLeft) ? gain : 1.0f, frames);

if (! isMono)
handle_audio_buffers(inBuffer[1], outBuffer[1], applyRight ? gain : 1.0f, frames);

return;

// unused
(void)midiEvents;
(void)midiEventCount;
}

// -----------------------------------------------------------------------

static const NativePluginDescriptor audiogainMonoDesc = {
.category = NATIVE_PLUGIN_CATEGORY_UTILITY,
.hints = NATIVE_PLUGIN_IS_RTSAFE,
.supports = NATIVE_PLUGIN_SUPPORTS_NOTHING,
.audioIns = 1,
.audioOuts = 1,
.midiIns = 0,
.midiOuts = 0,
.paramIns = PARAM_COUNT_MONO,
.paramOuts = 0,
.name = "Audio Gain (Mono)",
.label = "audiogain",
.maker = "falkTX",
.copyright = "GNU GPL v2+",

.instantiate = audiogain_instantiate_mono,
.cleanup = audiogain_cleanup,

.get_parameter_count = audiogain_get_parameter_count,
.get_parameter_info = audiogain_get_parameter_info,
.get_parameter_value = audiogain_get_parameter_value,

.get_midi_program_count = NULL,
.get_midi_program_info = NULL,

.set_parameter_value = audiogain_set_parameter_value,
.set_midi_program = NULL,
.set_custom_data = NULL,

.ui_show = NULL,
.ui_idle = NULL,

.ui_set_parameter_value = NULL,
.ui_set_midi_program = NULL,
.ui_set_custom_data = NULL,

.activate = NULL,
.deactivate = NULL,
.process = audiogain_process,

.get_state = NULL,
.set_state = NULL,

.dispatcher = NULL,

.render_inline_display = NULL
};

static const NativePluginDescriptor audiogainStereoDesc = {
.category = NATIVE_PLUGIN_CATEGORY_UTILITY,
.hints = NATIVE_PLUGIN_IS_RTSAFE,
.supports = NATIVE_PLUGIN_SUPPORTS_NOTHING,
.audioIns = 2,
.audioOuts = 2,
.midiIns = 0,
.midiOuts = 0,
.paramIns = PARAM_COUNT_STEREO,
.paramOuts = 0,
.name = "Audio Gain (Stereo)",
.label = "audiogain_s",
.maker = "falkTX",
.copyright = "GNU GPL v2+",

.instantiate = audiogain_instantiate_stereo,
.cleanup = audiogain_cleanup,

.get_parameter_count = audiogain_get_parameter_count,
.get_parameter_info = audiogain_get_parameter_info,
.get_parameter_value = audiogain_get_parameter_value,

.get_midi_program_count = NULL,
.get_midi_program_info = NULL,

.set_parameter_value = audiogain_set_parameter_value,
.set_midi_program = NULL,
.set_custom_data = NULL,

.ui_show = NULL,
.ui_idle = NULL,

.ui_set_parameter_value = NULL,
.ui_set_midi_program = NULL,
.ui_set_custom_data = NULL,

.activate = NULL,
.deactivate = NULL,
.process = audiogain_process,

.get_state = NULL,
.set_state = NULL,

.dispatcher = NULL,

.render_inline_display = NULL
};

// -----------------------------------------------------------------------

void carla_register_native_plugin_audiogain(void);

void carla_register_native_plugin_audiogain(void)
{
carla_register_native_plugin(&audiogainMonoDesc);
carla_register_native_plugin(&audiogainStereoDesc);
}

// -----------------------------------------------------------------------

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