Fix nekobi tuning parameter

See https://github.com/DISTRHO/Nekobi/pull/17

Signed-off-by: falkTX <falktx@falktx.com>

plugins/Nekobi/DistrhoPluginNekobi.cpp

@@ -18,7 +18,6 @@
 
 #include "DistrhoPluginNekobi.hpp"
 
-extern "C" {
 
 #include "nekobee-src/nekobee_synth.c"
 #include "nekobee-src/nekobee_voice.c"
@@ -31,7 +30,7 @@ extern "C" {
 bool dssp_voicelist_mutex_trylock(nekobee_synth_t* const synth)
 {
     /* Attempt the mutex lock */
-    if (pthread_mutex_trylock(&synth->voicelist_mutex) != 0)
+    if (!synth->voicelist_mutex.try_lock())
     {
         synth->voicelist_mutex_grab_failed = 1;
         return false;
@@ -47,9 +46,9 @@ bool dssp_voicelist_mutex_trylock(nekobee_synth_t* const synth)
     return true;
 }
 
-bool dssp_voicelist_mutex_unlock(nekobee_synth_t* const synth)
+void dssp_voicelist_mutex_unlock(nekobee_synth_t* const synth)
 {
-    return (pthread_mutex_unlock(&synth->voicelist_mutex) == 0);
+    synth->voicelist_mutex.unlock();
 }
 
 // -----------------------------------------------------------------------
@@ -79,7 +78,6 @@ void nekobee_handle_raw_event(nekobee_synth_t* const synth, const uint8_t size,
     }
 }
 
-} /* extern "C" */
 
 START_NAMESPACE_DISTRHO
 
@@ -109,7 +107,6 @@ DistrhoPluginNekobi::DistrhoPluginNekobi()
 
     fSynth.voice = nekobee_voice_new();
     fSynth.voicelist_mutex_grab_failed = 0;
-    pthread_mutex_init(&fSynth.voicelist_mutex, nullptr);
 
     fSynth.channel_pressure = 0;
     fSynth.pitch_wheel_sensitivity = 0;
@@ -299,7 +296,7 @@ void DistrhoPluginNekobi::setParameterValue(uint32_t index, float value)
         break;
     case paramTuning:
         fParams.tuning = value;
-        fSynth.tuning = (value+12.0f)/24.0f * 1.5 + 0.5f; // FIXME: log?
+        fSynth.tuning = exp2f( value / 12.0f );
         DISTRHO_SAFE_ASSERT(fSynth.tuning >= 0.5f && fSynth.tuning <= 2.0f);
         break;
     case paramCutoff:

plugins/Nekobi/DistrhoPluginNekobi.hpp

@@ -21,9 +21,7 @@
 
 #include "DistrhoPlugin.hpp"
 
-extern "C" {
 #include "nekobee-src/nekobee_synth.h"
-}
 
 START_NAMESPACE_DISTRHO
 

plugins/Nekobi/nekobee-src/nekobee.h

@@ -63,8 +63,8 @@
 
 #else  /* !XSYNTH_DEBUG */
 
-#define XDB_MESSAGE(type, fmt...)
-#define GDB_MESSAGE(type, fmt...)
+#define XDB_MESSAGE(type, fmt, ...)
+#define GDB_MESSAGE(type, fmt, ...)
 #define XSYNTH_DEBUG_INIT(x)
 
 #endif  /* XSYNTH_DEBUG */

plugins/Nekobi/nekobee-src/nekobee_synth.c

@@ -29,7 +29,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <math.h>
-#include <pthread.h>
+#include <mutex>
 
 #include "nekobee.h"
 #include "nekobee_synth.h"

plugins/Nekobi/nekobee-src/nekobee_synth.h

@@ -26,7 +26,7 @@
 #ifndef _XSYNTH_SYNTH_H
 #define _XSYNTH_SYNTH_H
 
-#include <pthread.h>
+#include <mutex>
 
 #include "nekobee.h"
 #include "nekobee_types.h"
@@ -64,7 +64,7 @@ struct _nekobee_synth_t {
 
     //nekobee_voice_t *voice[XSYNTH_MAX_POLYPHONY];
     nekobee_voice_t *voice;
-    pthread_mutex_t voicelist_mutex;
+    std::mutex      voicelist_mutex;
     int             voicelist_mutex_grab_failed;
 
     /* current non-paramter-mapped controller values */