media/jni/android_media_Utils.cpp - platform/frameworks/base - Git at Google

 /*
  * Copyright 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.
  */

 // #define LOG_NDEBUG 0
 #define LOG_TAG "AndroidMediaUtils"

 #include <utils/Log.h>
 #include "android_media_Utils.h"

 #include <media/stagefright/foundation/ADebug.h>
 #include <media/stagefright/foundation/ABuffer.h>
 #include <media/stagefright/foundation/AMessage.h>

 #include <nativehelper/ScopedLocalRef.h>

 namespace android {

 bool ConvertKeyValueArraysToKeyedVector(
         JNIEnv *env, jobjectArray keys, jobjectArray values,
         KeyedVector<String8, String8>* keyedVector) {

     int nKeyValuePairs = 0;
     bool failed = false;
     if (keys != NULL && values != NULL) {
         nKeyValuePairs = env->GetArrayLength(keys);
         failed = (nKeyValuePairs != env->GetArrayLength(values));
     }

     if (!failed) {
         failed = ((keys != NULL && values == NULL) ||
                   (keys == NULL && values != NULL));
     }

     if (failed) {
         ALOGE("keys and values arrays have different length");
         jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
         return false;
     }

     for (int i = 0; i < nKeyValuePairs; ++i) {
         // No need to check on the ArrayIndexOutOfBoundsException, since
         // it won't happen here.
         jstring key = (jstring) env->GetObjectArrayElement(keys, i);
         jstring value = (jstring) env->GetObjectArrayElement(values, i);

         const char* keyStr = env->GetStringUTFChars(key, NULL);
         if (!keyStr) {  // OutOfMemoryError
             return false;
         }

         const char* valueStr = env->GetStringUTFChars(value, NULL);
         if (!valueStr) {  // OutOfMemoryError
             env->ReleaseStringUTFChars(key, keyStr);
             return false;
         }

         keyedVector->add(String8(keyStr), String8(valueStr));

         env->ReleaseStringUTFChars(key, keyStr);
         env->ReleaseStringUTFChars(value, valueStr);
         env->DeleteLocalRef(key);
         env->DeleteLocalRef(value);
     }
     return true;
 }

 static jobject makeIntegerObject(JNIEnv *env, int32_t value) {
     ScopedLocalRef<jclass> clazz(env, env->FindClass("java/lang/Integer"));
     CHECK(clazz.get() != NULL);

     jmethodID integerConstructID =
         env->GetMethodID(clazz.get(), "<init>", "(I)V");
     CHECK(integerConstructID != NULL);

     return env->NewObject(clazz.get(), integerConstructID, value);
 }

 static jobject makeLongObject(JNIEnv *env, int64_t value) {
     ScopedLocalRef<jclass> clazz(env, env->FindClass("java/lang/Long"));
     CHECK(clazz.get() != NULL);

     jmethodID longConstructID = env->GetMethodID(clazz.get(), "<init>", "(J)V");
     CHECK(longConstructID != NULL);

     return env->NewObject(clazz.get(), longConstructID, value);
 }

 static jobject makeFloatObject(JNIEnv *env, float value) {
     ScopedLocalRef<jclass> clazz(env, env->FindClass("java/lang/Float"));
     CHECK(clazz.get() != NULL);

     jmethodID floatConstructID =
         env->GetMethodID(clazz.get(), "<init>", "(F)V");
     CHECK(floatConstructID != NULL);

     return env->NewObject(clazz.get(), floatConstructID, value);
 }

 static jobject makeByteBufferObject(
         JNIEnv *env, const void *data, size_t size) {
     jbyteArray byteArrayObj = env->NewByteArray(size);
     env->SetByteArrayRegion(byteArrayObj, 0, size, (const jbyte *)data);

     ScopedLocalRef<jclass> clazz(env, env->FindClass("java/nio/ByteBuffer"));
     CHECK(clazz.get() != NULL);

     jmethodID byteBufWrapID =
         env->GetStaticMethodID(
                 clazz.get(), "wrap", "([B)Ljava/nio/ByteBuffer;");
     CHECK(byteBufWrapID != NULL);

     jobject byteBufObj = env->CallStaticObjectMethod(
             clazz.get(), byteBufWrapID, byteArrayObj);

     env->DeleteLocalRef(byteArrayObj); byteArrayObj = NULL;

     return byteBufObj;
 }

 static void SetMapInt32(
         JNIEnv *env, jobject hashMapObj, jmethodID hashMapPutID,
         const char *key, int32_t value) {
     jstring keyObj = env->NewStringUTF(key);
     jobject valueObj = makeIntegerObject(env, value);

     env->CallObjectMethod(hashMapObj, hashMapPutID, keyObj, valueObj);

     env->DeleteLocalRef(valueObj); valueObj = NULL;
     env->DeleteLocalRef(keyObj); keyObj = NULL;
 }

 status_t ConvertMessageToMap(
         JNIEnv *env, const sp<AMessage> &msg, jobject *map) {
     ScopedLocalRef<jclass> hashMapClazz(
             env, env->FindClass("java/util/HashMap"));

     if (hashMapClazz.get() == NULL) {
         return -EINVAL;
     }

     jmethodID hashMapConstructID =
         env->GetMethodID(hashMapClazz.get(), "<init>", "()V");

     if (hashMapConstructID == NULL) {
         return -EINVAL;
     }

     jmethodID hashMapPutID =
         env->GetMethodID(
                 hashMapClazz.get(),
                 "put",
                 "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");

     if (hashMapPutID == NULL) {
         return -EINVAL;
     }

     jobject hashMap = env->NewObject(hashMapClazz.get(), hashMapConstructID);

     for (size_t i = 0; i < msg->countEntries(); ++i) {
         AMessage::Type valueType;
         const char *key = msg->getEntryNameAt(i, &valueType);

         jobject valueObj = NULL;

         switch (valueType) {
             case AMessage::kTypeInt32:
             {
                 int32_t val;
                 CHECK(msg->findInt32(key, &val));

                 valueObj = makeIntegerObject(env, val);
                 break;
             }

             case AMessage::kTypeInt64:
             {
                 int64_t val;
                 CHECK(msg->findInt64(key, &val));

                 valueObj = makeLongObject(env, val);
                 break;
             }

             case AMessage::kTypeFloat:
             {
                 float val;
                 CHECK(msg->findFloat(key, &val));

                 valueObj = makeFloatObject(env, val);
                 break;
             }

             case AMessage::kTypeString:
             {
                 AString val;
                 CHECK(msg->findString(key, &val));

                 valueObj = env->NewStringUTF(val.c_str());
                 break;
             }

             case AMessage::kTypeBuffer:
             {
                 sp<ABuffer> buffer;
                 CHECK(msg->findBuffer(key, &buffer));

                 valueObj = makeByteBufferObject(
                         env, buffer->data(), buffer->size());
                 break;
             }

             case AMessage::kTypeRect:
             {
                 int32_t left, top, right, bottom;
                 CHECK(msg->findRect(key, &left, &top, &right, &bottom));

                 SetMapInt32(
                         env,
                         hashMap,
                         hashMapPutID,
                         AStringPrintf("%s-left", key).c_str(),
                         left);

                 SetMapInt32(
                         env,
                         hashMap,
                         hashMapPutID,
                         AStringPrintf("%s-top", key).c_str(),
                         top);

                 SetMapInt32(
                         env,
                         hashMap,
                         hashMapPutID,
                         AStringPrintf("%s-right", key).c_str(),
                         right);

                 SetMapInt32(
                         env,
                         hashMap,
                         hashMapPutID,
                         AStringPrintf("%s-bottom", key).c_str(),
                         bottom);
                 break;
             }

             default:
                 break;
         }

         if (valueObj != NULL) {
             jstring keyObj = env->NewStringUTF(key);

             env->CallObjectMethod(hashMap, hashMapPutID, keyObj, valueObj);

             env->DeleteLocalRef(keyObj); keyObj = NULL;
             env->DeleteLocalRef(valueObj); valueObj = NULL;
         }
     }

     *map = hashMap;

     return OK;
 }

 status_t ConvertKeyValueArraysToMessage(
         JNIEnv *env, jobjectArray keys, jobjectArray values,
         sp<AMessage> *out) {
     ScopedLocalRef<jclass> stringClass(env, env->FindClass("java/lang/String"));
     CHECK(stringClass.get() != NULL);
     ScopedLocalRef<jclass> integerClass(env, env->FindClass("java/lang/Integer"));
     CHECK(integerClass.get() != NULL);
     ScopedLocalRef<jclass> longClass(env, env->FindClass("java/lang/Long"));
     CHECK(longClass.get() != NULL);
     ScopedLocalRef<jclass> floatClass(env, env->FindClass("java/lang/Float"));
     CHECK(floatClass.get() != NULL);
     ScopedLocalRef<jclass> byteBufClass(env, env->FindClass("java/nio/ByteBuffer"));
     CHECK(byteBufClass.get() != NULL);

     sp<AMessage> msg = new AMessage;

     jsize numEntries = 0;

     if (keys != NULL) {
         if (values == NULL) {
             return -EINVAL;
         }

         numEntries = env->GetArrayLength(keys);

         if (numEntries != env->GetArrayLength(values)) {
             return -EINVAL;
         }
     } else if (values != NULL) {
         return -EINVAL;
     }

     for (jsize i = 0; i < numEntries; ++i) {
         jobject keyObj = env->GetObjectArrayElement(keys, i);

         if (!env->IsInstanceOf(keyObj, stringClass.get())) {
             return -EINVAL;
         }

         const char *tmp = env->GetStringUTFChars((jstring)keyObj, NULL);

         if (tmp == NULL) {
             return -ENOMEM;
         }

         AString key = tmp;

         env->ReleaseStringUTFChars((jstring)keyObj, tmp);
         tmp = NULL;

         jobject valueObj = env->GetObjectArrayElement(values, i);

         if (env->IsInstanceOf(valueObj, stringClass.get())) {
             const char *value = env->GetStringUTFChars((jstring)valueObj, NULL);

             if (value == NULL) {
                 return -ENOMEM;
             }

             msg->setString(key.c_str(), value);

             env->ReleaseStringUTFChars((jstring)valueObj, value);
             value = NULL;
         } else if (env->IsInstanceOf(valueObj, integerClass.get())) {
             jmethodID intValueID =
                 env->GetMethodID(integerClass.get(), "intValue", "()I");
             CHECK(intValueID != NULL);

             jint value = env->CallIntMethod(valueObj, intValueID);

             msg->setInt32(key.c_str(), value);
         } else if (env->IsInstanceOf(valueObj, longClass.get())) {
             jmethodID longValueID =
                 env->GetMethodID(longClass.get(), "longValue", "()J");
             CHECK(longValueID != NULL);

             jlong value = env->CallLongMethod(valueObj, longValueID);

             msg->setInt64(key.c_str(), value);
         } else if (env->IsInstanceOf(valueObj, floatClass.get())) {
             jmethodID floatValueID =
                 env->GetMethodID(floatClass.get(), "floatValue", "()F");
             CHECK(floatValueID != NULL);

             jfloat value = env->CallFloatMethod(valueObj, floatValueID);

             msg->setFloat(key.c_str(), value);
         } else if (env->IsInstanceOf(valueObj, byteBufClass.get())) {
             jmethodID positionID =
                 env->GetMethodID(byteBufClass.get(), "position", "()I");
             CHECK(positionID != NULL);

             jmethodID limitID =
                 env->GetMethodID(byteBufClass.get(), "limit", "()I");
             CHECK(limitID != NULL);

             jint position = env->CallIntMethod(valueObj, positionID);
             jint limit = env->CallIntMethod(valueObj, limitID);

             sp<ABuffer> buffer = new ABuffer(limit - position);

             void *data = env->GetDirectBufferAddress(valueObj);

             if (data != NULL) {
                 memcpy(buffer->data(),
                        (const uint8_t *)data + position,
                        buffer->size());
             } else {
                 jmethodID arrayID =
                     env->GetMethodID(byteBufClass.get(), "array", "()[B");
                 CHECK(arrayID != NULL);

                 jbyteArray byteArray =
                     (jbyteArray)env->CallObjectMethod(valueObj, arrayID);
                 CHECK(byteArray != NULL);

                 env->GetByteArrayRegion(
                         byteArray,
                         position,
                         buffer->size(),
                         (jbyte *)buffer->data());

                 env->DeleteLocalRef(byteArray); byteArray = NULL;
             }

             msg->setBuffer(key.c_str(), buffer);
         }
     }

     *out = msg;

     return OK;
 }

 }  // namespace android
	/*
	* Copyright 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.
	*/

	// #define LOG_NDEBUG 0
	#define LOG_TAG "AndroidMediaUtils"

	#include <utils/Log.h>
	#include "android_media_Utils.h"

	#include <media/stagefright/foundation/ADebug.h>
	#include <media/stagefright/foundation/ABuffer.h>
	#include <media/stagefright/foundation/AMessage.h>

	#include <nativehelper/ScopedLocalRef.h>

	namespace android {

	bool ConvertKeyValueArraysToKeyedVector(
	JNIEnv *env, jobjectArray keys, jobjectArray values,
	KeyedVector<String8, String8>* keyedVector) {

	int nKeyValuePairs = 0;
	bool failed = false;
	if (keys != NULL && values != NULL) {
	nKeyValuePairs = env->GetArrayLength(keys);
	failed = (nKeyValuePairs != env->GetArrayLength(values));
	}

	if (!failed) {
	failed = ((keys != NULL && values == NULL) \|\|
	(keys == NULL && values != NULL));
	}

	if (failed) {
	ALOGE("keys and values arrays have different length");
	jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
	return false;
	}

	for (int i = 0; i < nKeyValuePairs; ++i) {
	// No need to check on the ArrayIndexOutOfBoundsException, since
	// it won't happen here.
	jstring key = (jstring) env->GetObjectArrayElement(keys, i);
	jstring value = (jstring) env->GetObjectArrayElement(values, i);

	const char* keyStr = env->GetStringUTFChars(key, NULL);
	if (!keyStr) { // OutOfMemoryError
	return false;
	}

	const char* valueStr = env->GetStringUTFChars(value, NULL);
	if (!valueStr) { // OutOfMemoryError
	env->ReleaseStringUTFChars(key, keyStr);
	return false;
	}

	keyedVector->add(String8(keyStr), String8(valueStr));

	env->ReleaseStringUTFChars(key, keyStr);
	env->ReleaseStringUTFChars(value, valueStr);
	env->DeleteLocalRef(key);
	env->DeleteLocalRef(value);
	}
	return true;
	}

	static jobject makeIntegerObject(JNIEnv *env, int32_t value) {
	ScopedLocalRef<jclass> clazz(env, env->FindClass("java/lang/Integer"));
	CHECK(clazz.get() != NULL);

	jmethodID integerConstructID =
	env->GetMethodID(clazz.get(), "<init>", "(I)V");
	CHECK(integerConstructID != NULL);

	return env->NewObject(clazz.get(), integerConstructID, value);
	}

	static jobject makeLongObject(JNIEnv *env, int64_t value) {
	ScopedLocalRef<jclass> clazz(env, env->FindClass("java/lang/Long"));
	CHECK(clazz.get() != NULL);

	jmethodID longConstructID = env->GetMethodID(clazz.get(), "<init>", "(J)V");
	CHECK(longConstructID != NULL);

	return env->NewObject(clazz.get(), longConstructID, value);
	}

	static jobject makeFloatObject(JNIEnv *env, float value) {
	ScopedLocalRef<jclass> clazz(env, env->FindClass("java/lang/Float"));
	CHECK(clazz.get() != NULL);

	jmethodID floatConstructID =
	env->GetMethodID(clazz.get(), "<init>", "(F)V");
	CHECK(floatConstructID != NULL);

	return env->NewObject(clazz.get(), floatConstructID, value);
	}

	static jobject makeByteBufferObject(
	JNIEnv env, const void data, size_t size) {
	jbyteArray byteArrayObj = env->NewByteArray(size);
	env->SetByteArrayRegion(byteArrayObj, 0, size, (const jbyte *)data);

	ScopedLocalRef<jclass> clazz(env, env->FindClass("java/nio/ByteBuffer"));
	CHECK(clazz.get() != NULL);

	jmethodID byteBufWrapID =
	env->GetStaticMethodID(
	clazz.get(), "wrap", "([B)Ljava/nio/ByteBuffer;");
	CHECK(byteBufWrapID != NULL);

	jobject byteBufObj = env->CallStaticObjectMethod(
	clazz.get(), byteBufWrapID, byteArrayObj);

	env->DeleteLocalRef(byteArrayObj); byteArrayObj = NULL;

	return byteBufObj;
	}

	static void SetMapInt32(
	JNIEnv *env, jobject hashMapObj, jmethodID hashMapPutID,
	const char *key, int32_t value) {
	jstring keyObj = env->NewStringUTF(key);
	jobject valueObj = makeIntegerObject(env, value);

	env->CallObjectMethod(hashMapObj, hashMapPutID, keyObj, valueObj);

	env->DeleteLocalRef(valueObj); valueObj = NULL;
	env->DeleteLocalRef(keyObj); keyObj = NULL;
	}

	status_t ConvertMessageToMap(
	JNIEnv env, const sp<AMessage> &msg, jobject map) {
	ScopedLocalRef<jclass> hashMapClazz(
	env, env->FindClass("java/util/HashMap"));

	if (hashMapClazz.get() == NULL) {
	return -EINVAL;
	}

	jmethodID hashMapConstructID =
	env->GetMethodID(hashMapClazz.get(), "<init>", "()V");

	if (hashMapConstructID == NULL) {
	return -EINVAL;
	}

	jmethodID hashMapPutID =
	env->GetMethodID(
	hashMapClazz.get(),
	"put",
	"(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");

	if (hashMapPutID == NULL) {
	return -EINVAL;
	}

	jobject hashMap = env->NewObject(hashMapClazz.get(), hashMapConstructID);

	for (size_t i = 0; i < msg->countEntries(); ++i) {
	AMessage::Type valueType;
	const char *key = msg->getEntryNameAt(i, &valueType);

	jobject valueObj = NULL;

	switch (valueType) {
	case AMessage::kTypeInt32:
	{
	int32_t val;
	CHECK(msg->findInt32(key, &val));

	valueObj = makeIntegerObject(env, val);
	break;
	}

	case AMessage::kTypeInt64:
	{
	int64_t val;
	CHECK(msg->findInt64(key, &val));

	valueObj = makeLongObject(env, val);
	break;
	}

	case AMessage::kTypeFloat:
	{
	float val;
	CHECK(msg->findFloat(key, &val));

	valueObj = makeFloatObject(env, val);
	break;
	}

	case AMessage::kTypeString:
	{
	AString val;
	CHECK(msg->findString(key, &val));

	valueObj = env->NewStringUTF(val.c_str());
	break;
	}

	case AMessage::kTypeBuffer:
	{
	sp<ABuffer> buffer;
	CHECK(msg->findBuffer(key, &buffer));

	valueObj = makeByteBufferObject(
	env, buffer->data(), buffer->size());
	break;
	}

	case AMessage::kTypeRect:
	{
	int32_t left, top, right, bottom;
	CHECK(msg->findRect(key, &left, &top, &right, &bottom));

	SetMapInt32(
	env,
	hashMap,
	hashMapPutID,
	AStringPrintf("%s-left", key).c_str(),
	left);

	SetMapInt32(
	env,
	hashMap,
	hashMapPutID,
	AStringPrintf("%s-top", key).c_str(),
	top);

	SetMapInt32(
	env,
	hashMap,
	hashMapPutID,
	AStringPrintf("%s-right", key).c_str(),
	right);

	SetMapInt32(
	env,
	hashMap,
	hashMapPutID,
	AStringPrintf("%s-bottom", key).c_str(),
	bottom);
	break;
	}

	default:
	break;
	}

	if (valueObj != NULL) {
	jstring keyObj = env->NewStringUTF(key);

	env->CallObjectMethod(hashMap, hashMapPutID, keyObj, valueObj);

	env->DeleteLocalRef(keyObj); keyObj = NULL;
	env->DeleteLocalRef(valueObj); valueObj = NULL;
	}
	}

	*map = hashMap;

	return OK;
	}

	status_t ConvertKeyValueArraysToMessage(
	JNIEnv *env, jobjectArray keys, jobjectArray values,
	sp<AMessage> *out) {
	ScopedLocalRef<jclass> stringClass(env, env->FindClass("java/lang/String"));
	CHECK(stringClass.get() != NULL);
	ScopedLocalRef<jclass> integerClass(env, env->FindClass("java/lang/Integer"));
	CHECK(integerClass.get() != NULL);
	ScopedLocalRef<jclass> longClass(env, env->FindClass("java/lang/Long"));
	CHECK(longClass.get() != NULL);
	ScopedLocalRef<jclass> floatClass(env, env->FindClass("java/lang/Float"));
	CHECK(floatClass.get() != NULL);
	ScopedLocalRef<jclass> byteBufClass(env, env->FindClass("java/nio/ByteBuffer"));
	CHECK(byteBufClass.get() != NULL);

	sp<AMessage> msg = new AMessage;

	jsize numEntries = 0;

	if (keys != NULL) {
	if (values == NULL) {
	return -EINVAL;
	}

	numEntries = env->GetArrayLength(keys);

	if (numEntries != env->GetArrayLength(values)) {
	return -EINVAL;
	}
	} else if (values != NULL) {
	return -EINVAL;
	}

	for (jsize i = 0; i < numEntries; ++i) {
	jobject keyObj = env->GetObjectArrayElement(keys, i);

	if (!env->IsInstanceOf(keyObj, stringClass.get())) {
	return -EINVAL;
	}

	const char *tmp = env->GetStringUTFChars((jstring)keyObj, NULL);

	if (tmp == NULL) {
	return -ENOMEM;
	}

	AString key = tmp;

	env->ReleaseStringUTFChars((jstring)keyObj, tmp);
	tmp = NULL;

	jobject valueObj = env->GetObjectArrayElement(values, i);

	if (env->IsInstanceOf(valueObj, stringClass.get())) {
	const char *value = env->GetStringUTFChars((jstring)valueObj, NULL);

	if (value == NULL) {
	return -ENOMEM;
	}

	msg->setString(key.c_str(), value);

	env->ReleaseStringUTFChars((jstring)valueObj, value);
	value = NULL;
	} else if (env->IsInstanceOf(valueObj, integerClass.get())) {
	jmethodID intValueID =
	env->GetMethodID(integerClass.get(), "intValue", "()I");
	CHECK(intValueID != NULL);

	jint value = env->CallIntMethod(valueObj, intValueID);

	msg->setInt32(key.c_str(), value);
	} else if (env->IsInstanceOf(valueObj, longClass.get())) {
	jmethodID longValueID =
	env->GetMethodID(longClass.get(), "longValue", "()J");
	CHECK(longValueID != NULL);

	jlong value = env->CallLongMethod(valueObj, longValueID);

	msg->setInt64(key.c_str(), value);
	} else if (env->IsInstanceOf(valueObj, floatClass.get())) {
	jmethodID floatValueID =
	env->GetMethodID(floatClass.get(), "floatValue", "()F");
	CHECK(floatValueID != NULL);

	jfloat value = env->CallFloatMethod(valueObj, floatValueID);

	msg->setFloat(key.c_str(), value);
	} else if (env->IsInstanceOf(valueObj, byteBufClass.get())) {
	jmethodID positionID =
	env->GetMethodID(byteBufClass.get(), "position", "()I");
	CHECK(positionID != NULL);

	jmethodID limitID =
	env->GetMethodID(byteBufClass.get(), "limit", "()I");
	CHECK(limitID != NULL);

	jint position = env->CallIntMethod(valueObj, positionID);
	jint limit = env->CallIntMethod(valueObj, limitID);

	sp<ABuffer> buffer = new ABuffer(limit - position);

	void *data = env->GetDirectBufferAddress(valueObj);

	if (data != NULL) {
	memcpy(buffer->data(),
	(const uint8_t *)data + position,
	buffer->size());
	} else {
	jmethodID arrayID =
	env->GetMethodID(byteBufClass.get(), "array", "()[B");
	CHECK(arrayID != NULL);

	jbyteArray byteArray =
	(jbyteArray)env->CallObjectMethod(valueObj, arrayID);
	CHECK(byteArray != NULL);

	env->GetByteArrayRegion(
	byteArray,
	position,
	buffer->size(),
	(jbyte *)buffer->data());

	env->DeleteLocalRef(byteArray); byteArray = NULL;
	}

	msg->setBuffer(key.c_str(), buffer);
	}
	}

	*out = msg;

	return OK;
	}

	} // namespace android