Fix potential memory leaks if CoreAudio initialization fails.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%402203

src/audio/macosx/SDL_coreaudio.c

@@ -315,6 +315,7 @@ static void
 COREAUDIO_CloseDevice(_THIS)
 {
     if (this->hidden != NULL) {
+        if (this->hidden->audioUnitOpened) {
             OSStatus result = noErr;
             AURenderCallbackStruct callback;
             const AudioUnitElement output_bus = 0;
@@ -331,10 +332,12 @@ COREAUDIO_CloseDevice(_THIS)
             SDL_memset(&callback, '\0', sizeof (AURenderCallbackStruct));
             result = AudioUnitSetProperty(this->hidden->audioUnit,
                                           kAudioUnitProperty_SetRenderCallback,
-                                      scope, bus, &callback, sizeof (callback));
+                                          scope, bus, &callback,
+                                          sizeof (callback));
 
             CloseComponent(this->hidden->audioUnit);
-
+            this->hidden->audioUnitOpened = 0;
+        }
         SDL_free(this->hidden->buffer);
         SDL_free(this->hidden);
         this->hidden = NULL;
@@ -435,6 +438,8 @@ prepare_audiounit(_THIS, const char *devname, int iscapture,
     result = OpenAComponent(comp, &this->hidden->audioUnit);
     CHECK_RESULT("OpenAComponent");
 
+    this->hidden->audioUnitOpened = 1;
+
     // !!! FIXME: this is wrong?
     enableIO = ((iscapture) ? 1 : 0);
     result = AudioUnitSetProperty(this->hidden->audioUnit,
@@ -544,6 +549,7 @@ COREAUDIO_OpenDevice(_THIS, const char *devname, int iscapture)
     }
 
     if (!valid_datatype) {      /* shouldn't happen, but just in case... */
+        COREAUDIO_CloseDevice(this);
         SDL_SetError("Unsupported audio format");
         return 0;
     }
@@ -554,6 +560,7 @@ COREAUDIO_OpenDevice(_THIS, const char *devname, int iscapture)
         strdesc.mBytesPerFrame * strdesc.mFramesPerPacket;
 
     if (!prepare_audiounit(this, devname, iscapture, &strdesc)) {
+        COREAUDIO_CloseDevice(this); \
         return 0;  /* prepare_audiounit() will call SDL_SetError()... */
     }
 

src/audio/macosx/SDL_coreaudio.h

@@ -32,6 +32,7 @@
 struct SDL_PrivateAudioData
 {
     AudioUnit audioUnit;
+    int audioUnitInitialized;
     void *buffer;
     UInt32 bufferOffset;
     UInt32 bufferSize;