1 files changed, 84 insertions, 0 deletions
diff --git a/media/mca/filterfw/jni/jni_native_buffer.cpp b/media/mca/filterfw/jni/jni_native_buffer.cpp
new file mode 100644
index 0000000..097c145
--- /dev/null
+++ b/media/mca/filterfw/jni/jni_native_buffer.cpp
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "jni/jni_native_buffer.h"
+#include "jni/jni_util.h"
+
+char* GetJBufferData(JNIEnv* env, jobject buffer, int* size) {
+  jclass base_class = env->FindClass("android/filterfw/core/NativeBuffer");
+
+  // Get fields
+  jfieldID ptr_field = env->GetFieldID(base_class, "mDataPointer", "J");
+  jfieldID size_field = env->GetFieldID(base_class, "mSize", "I");
+
+  // Get their values
+  char* data = reinterpret_cast<char*>(env->GetLongField(buffer, ptr_field));
+  if (size) {
+    *size = env->GetIntField(buffer, size_field);
+  }
+
+  // Clean-up
+  env->DeleteLocalRef(base_class);
+
+  return data;
+}
+
+bool AttachDataToJBuffer(JNIEnv* env, jobject buffer, char* data, int size) {
+  jclass base_class = env->FindClass("android/filterfw/core/NativeBuffer");
+
+  // Get fields
+  jfieldID ptr_field = env->GetFieldID(base_class, "mDataPointer", "J");
+  jfieldID size_field = env->GetFieldID(base_class, "mSize", "I");
+
+  // Set their values
+  env->SetLongField(buffer, ptr_field, reinterpret_cast<jlong>(data));
+  env->SetIntField(buffer, size_field, size);
+
+  return true;
+}
+
+jboolean Java_android_filterfw_core_NativeBuffer_allocate(JNIEnv* env, jobject thiz, jint size) {
+  char* data = new char[size];
+  return ToJBool(AttachDataToJBuffer(env, thiz, data, size));
+}
+
+jboolean Java_android_filterfw_core_NativeBuffer_deallocate(JNIEnv* env,
+                                                            jobject thiz,
+                                                            jboolean owns_data) {
+  if (ToCppBool(owns_data)) {
+    char* data = GetJBufferData(env, thiz, NULL);
+    delete[] data;
+  }
+  return JNI_TRUE;
+}
+
+jboolean Java_android_filterfw_core_NativeBuffer_nativeCopyTo(JNIEnv* env,
+                                                              jobject thiz,
+                                                              jobject new_buffer) {
+  // Get source buffer
+  int size;
+  char* source_data = GetJBufferData(env, thiz, &size);
+
+  // Make copy
+  char* target_data = new char[size];
+  memcpy(target_data, source_data, size);
+
+  // Attach it to new buffer
+  AttachDataToJBuffer(env, new_buffer, target_data, size);
+
+  return JNI_TRUE;
+}
+