Make ReBuffer refcount management automatic, using std::shared_ptr:

- No longer need to call setRefCount() / decRefCount()
- Restore old ThreadBlockingQueue using std::deque, for std::shared_ptr correct behaviour.

src/modules/modem/Modem.h

@@ -8,6 +8,7 @@
 #include "AudioThread.h"
 #include <cmath>
 #include <atomic>
+#include <memory>
 
 #define MIN_BANDWIDTH 500
 
@@ -25,7 +26,7 @@ public:
     int audioSampleRate;
 };
 
-class ModemIQData: public ReferenceCounter {
+class ModemIQData {
 public:
     std::vector<liquid_float_complex> data;
     long long sampleRate;
@@ -34,11 +35,13 @@ public:
         
     }
     
-    ~ModemIQData() {
-        std::lock_guard < std::recursive_mutex > lock(m_mutex);
+    virtual ~ModemIQData() {
+        
     }
 };
 
+typedef std::shared_ptr<ModemIQData> ModemIQDataPtr;
+
 // Copy of SoapySDR::Range, original comments
 class ModemRange
 {

src/modules/modem/analog/ModemAM.cpp

@@ -24,13 +24,13 @@ int ModemAM::getDefaultSampleRate() {
     return 6000;
 }
 
-void ModemAM::demodulate(ModemKit *kit, ModemIQData *input, AudioThreadInput *audioOut) {
+void ModemAM::demodulate(ModemKit *kit, ModemIQData *input, AudioThreadInput* audioOut) {
     ModemKitAnalog *amkit = (ModemKitAnalog *)kit;
     
     initOutputBuffers(amkit,input);
     
     if (!bufSize) {
-        input->decRefCount();
+       
         return;
     }
     

src/modules/modem/analog/ModemDSB.cpp

@@ -30,7 +30,7 @@ void ModemDSB::demodulate(ModemKit *kit, ModemIQData *input, AudioThreadInput *a
     initOutputBuffers(amkit, input);
     
     if (!bufSize) {
-        input->decRefCount();
+       
         return;
     }
     

src/modules/modem/analog/ModemFM.cpp

@@ -29,7 +29,7 @@ void ModemFM::demodulate(ModemKit *kit, ModemIQData *input, AudioThreadInput *au
     initOutputBuffers(fmkit, input);
     
     if (!bufSize) {
-        input->decRefCount();
+      
         return;
     }
     

src/modules/modem/analog/ModemIQ.cpp

@@ -42,7 +42,7 @@ void ModemIQ::demodulate(ModemKit * /* kit */, ModemIQData *input, AudioThreadIn
     size_t bufSize = input->data.size();
     
     if (!bufSize) {
-        input->decRefCount();
+       
         return;
     }
     

src/modules/modem/analog/ModemLSB.cpp

@@ -46,7 +46,7 @@ void ModemLSB::demodulate(ModemKit *kit, ModemIQData *input, AudioThreadInput *a
     initOutputBuffers(akit,input);
     
     if (!bufSize) {
-        input->decRefCount();
+       
         return;
     }
     

src/modules/modem/analog/ModemNBFM.cpp

@@ -29,7 +29,7 @@ void ModemNBFM::demodulate(ModemKit *kit, ModemIQData *input, AudioThreadInput *
     initOutputBuffers(fmkit, input);
     
     if (!bufSize) {
-        input->decRefCount();
+       
         return;
     }
     

src/modules/modem/analog/ModemUSB.cpp

@@ -46,7 +46,7 @@ void ModemUSB::demodulate(ModemKit *kit, ModemIQData *input, AudioThreadInput *a
     initOutputBuffers(akit,input);
     
     if (!bufSize) {
-        input->decRefCount();
+       
         return;
     }