Use a reference counter and call the mpg123_init/exit accordingly in ctor/dtor

1 files changed, 13 insertions, 5 deletions

diff --git a/src/decoders/qalmpg123audiodecoder.cpp b/src/decoders/qalmpg123audiodecoder.cpp
index 96db818..a2ec57b 100644
--- a/src/decoders/qalmpg123audiodecoder.cpp
+++ b/src/decoders/qalmpg123audiodecoder.cpp
@@ -28,17 +28,23 @@ class QALMpg123AudioDecoder::Private
 {
     public:
         Private()
-            : mpg123Handle(0)
+            : referenceCounter(0)
+            , mpg123Handle(0)
         {
-            int error;
-            if ((error = mpg123_init()) == MPG123_OK) {
-                qWarning() << Q_FUNC_INFO << "Failed to initialize the mpg123 library:" << error;
+            referenceCounter.ref();
+            if (int(referenceCounter) == 1) {
+                int error;
+                if ((error = mpg123_init()) == MPG123_OK) {
+                    qWarning() << Q_FUNC_INFO << "Failed to initialize the mpg123 library:" << error;
+                }
             }
         }
 
         ~Private()
         {
-            mpg123_exit();
+            if (referenceCounter.deref() == false) {
+                mpg123_exit();
+            }
         }
 
         static sf_count_t fileLengthCallback(void *user_data);
@@ -46,6 +52,8 @@ class QALMpg123AudioDecoder::Private
         static sf_count_t readCallback(void *ptr, sf_count_t count, void *user_data);
         static sf_count_t tellCallback(void *user_data);
 
+        QAtomicInt referenceCounter;
+
         QFile file;
 
         QByteArray encodedData;