add methods to release direct byte buffer and get buffer address

Author: riccardobl

src/native/headers/com_jme3_util_AndroidNativeBufferAllocator.h

@@ -51,6 +51,7 @@
 #include <stdlib.h>
 #include <stdbool.h>
 #include <errno.h>
+#include <stdint.h>
 
 #ifndef NDEBUG
 #include <android/log.h>
@@ -85,6 +86,27 @@ JNIEXPORT void JNICALL Java_com_jme3_util_AndroidNativeBufferAllocator_releaseDi
     LOG(ANDROID_LOG_INFO, "Buffer mem_address formatted (mem_address, size) -> (%p, %u)", buffer, sizeof(buffer));
 }
 
+JNIEXPORT void JNICALL Java_com_jme3_util_AndroidNativeBufferAllocator_releaseDirectByteBufferAddress
+(JNIEnv * env, jobject object, jlong address)
+{
+    (void)env;
+    (void)object;
+    void* buffer = (void*)(uintptr_t) address;
+    free(buffer);
+    LOG(ANDROID_LOG_INFO, "Buffer released by address (mem_address) -> (%p)", buffer);
+}
+
+JNIEXPORT jlong JNICALL Java_com_jme3_util_AndroidNativeBufferAllocator_directBufferAddress
+(JNIEnv * env, jobject object, jobject bufferObject)
+{
+    (void)object;
+    if (bufferObject == NULL) {
+        return 0;
+    }
+    void* buffer = (*env)->GetDirectBufferAddress(env, bufferObject);
+    return (jlong)(uintptr_t) buffer;
+}
+
 JNIEXPORT jobject JNICALL Java_com_jme3_util_AndroidNativeBufferAllocator_createDirectByteBuffer
 (JNIEnv * env, jobject object, jlong size)
 {
@@ -96,4 +118,4 @@ JNIEXPORT jobject JNICALL Java_com_jme3_util_AndroidNativeBufferAllocator_create
        LOG(ANDROID_LOG_INFO, "Buffer created successfully (mem_address, size) -> (%p %lli)", buffer, size);
     }
     return (*env)->NewDirectByteBuffer(env, buffer, size);
-}
+}