| /* |
| * Copyright (C) 2020 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 "AudioTrackCallback-JNI" |
| |
| #include <algorithm> |
| |
| #include <nativehelper/JNIHelp.h> |
| #include <utils/Errors.h> |
| #include <utils/Log.h> |
| |
| #include "android_media_AudioTrackCallback.h" |
| #include "core_jni_helpers.h" |
| |
| using namespace android; |
| |
| #define BYTE_BUFFER_NAME "java/nio/ByteBuffer" |
| #define BYTE_BUFFER_ALLOCATE_DIRECT_NAME "allocateDirect" |
| |
| JNIAudioTrackCallback::JNIAudioTrackCallback(JNIEnv* env, jobject thiz, jobject weak_thiz, |
| jmethodID postEventFromNative) { |
| // Hold onto the AudioTrack class for use in calling the static method |
| // that posts events to the application thread. |
| jclass clazz = env->GetObjectClass(thiz); |
| if (clazz == nullptr) { |
| return; |
| } |
| mClass = (jclass)env->NewGlobalRef(clazz); |
| |
| // We use a weak reference so the AudioTrack object can be garbage collected. |
| // The reference is only used as a proxy for callbacks. |
| mObject = env->NewGlobalRef(weak_thiz); |
| |
| mPostEventFromNative = postEventFromNative; |
| |
| jclass byteBufferClass = FindClassOrDie(env, BYTE_BUFFER_NAME); |
| mByteBufferClass = (jclass)env->NewGlobalRef(byteBufferClass); |
| mAllocateDirectMethod = |
| GetStaticMethodIDOrDie(env, mByteBufferClass, BYTE_BUFFER_ALLOCATE_DIRECT_NAME, |
| "(I)Ljava/nio/ByteBuffer;"); |
| } |
| |
| JNIAudioTrackCallback::~JNIAudioTrackCallback() { |
| // remove global references |
| JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| if (env == nullptr) { |
| return; |
| } |
| env->DeleteGlobalRef(mObject); |
| env->DeleteGlobalRef(mClass); |
| env->DeleteGlobalRef(mByteBufferClass); |
| } |
| |
| binder::Status JNIAudioTrackCallback::onCodecFormatChanged( |
| const std::vector<uint8_t>& audioMetadata) { |
| JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| if (env == nullptr) { |
| return binder::Status::ok(); |
| } |
| |
| jobject byteBuffer = env->CallStaticObjectMethod(mByteBufferClass, mAllocateDirectMethod, |
| (jint)audioMetadata.size()); |
| if (env->ExceptionCheck()) { |
| ALOGW("An exception occurred while allocating direct buffer"); |
| env->ExceptionDescribe(); |
| env->ExceptionClear(); |
| } |
| if (byteBuffer == nullptr) { |
| ALOGE("Failed allocating a direct ByteBuffer"); |
| return binder::Status::fromStatusT(NO_MEMORY); |
| } |
| |
| uint8_t* byteBufferAddr = (uint8_t*)env->GetDirectBufferAddress(byteBuffer); |
| std::copy(audioMetadata.begin(), audioMetadata.end(), byteBufferAddr); |
| env->CallStaticVoidMethod(mClass, mPostEventFromNative, mObject, |
| AUDIO_NATIVE_EVENT_CODEC_FORMAT_CHANGE, 0, 0, byteBuffer); |
| if (env->ExceptionCheck()) { |
| ALOGW("An exception occurred while notifying codec format changed."); |
| env->ExceptionDescribe(); |
| env->ExceptionClear(); |
| } |
| |
| return binder::Status::ok(); |
| } |