app/jni/com_android_bluetooth_le_audio.cpp

/*   Copyright 2019 HIMSA II K/S - www.himsa.com
 * Represented by EHIMA - www.ehima.com
 *
 * 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_TAG "BluetoothLeAudioServiceJni"

#include <hardware/bluetooth.h>

#include <array>
#include <optional>
#include <shared_mutex>

#include "com_android_bluetooth.h"
#include "hardware/bt_le_audio.h"

using bluetooth::le_audio::BroadcastId;
using bluetooth::le_audio::BroadcastState;
using bluetooth::le_audio::btle_audio_codec_config_t;
using bluetooth::le_audio::btle_audio_codec_index_t;
using bluetooth::le_audio::ConnectionState;
using bluetooth::le_audio::GroupNodeStatus;
using bluetooth::le_audio::GroupStatus;
using bluetooth::le_audio::LeAudioBroadcasterCallbacks;
using bluetooth::le_audio::LeAudioBroadcasterInterface;
using bluetooth::le_audio::LeAudioClientCallbacks;
using bluetooth::le_audio::LeAudioClientInterface;

namespace android {
static jmethodID method_onInitialized;
static jmethodID method_onConnectionStateChanged;
static jmethodID method_onGroupStatus;
static jmethodID method_onGroupNodeStatus;
static jmethodID method_onAudioConf;
static jmethodID method_onSinkAudioLocationAvailable;
static jmethodID method_onAudioLocalCodecCapabilities;
static jmethodID method_onAudioGroupCodecConf;

static struct {
  jclass clazz;
  jmethodID constructor;
  jmethodID getCodecType;
} android_bluetooth_BluetoothLeAudioCodecConfig;

static struct {
  jclass clazz;
  jmethodID constructor;
} android_bluetooth_BluetoothLeAudioCodecConfigMetadata;

static struct {
  jclass clazz;
  jmethodID constructor;
  jmethodID add;
} java_util_ArrayList;

static struct {
  jclass clazz;
  jmethodID constructor;
} android_bluetooth_BluetoothLeBroadcastChannel;

static struct {
  jclass clazz;
  jmethodID constructor;
} android_bluetooth_BluetoothLeBroadcastSubgroup;

static struct {
  jclass clazz;
  jmethodID constructor;
} android_bluetooth_BluetoothLeAudioContentMetadata;

static struct {
  jclass clazz;
  jmethodID constructor;
} android_bluetooth_BluetoothLeBroadcastMetadata;

static struct {
  jclass clazz;
  jmethodID constructor;
} android_bluetooth_BluetoothDevice;

static LeAudioClientInterface* sLeAudioClientInterface = nullptr;
static std::shared_timed_mutex interface_mutex;

static jobject mCallbacksObj = nullptr;
static std::shared_timed_mutex callbacks_mutex;

jobject prepareCodecConfigObj(JNIEnv* env,
                              btle_audio_codec_config_t codecConfig) {
  jobject codecConfigObj =
      env->NewObject(android_bluetooth_BluetoothLeAudioCodecConfig.clazz,
                     android_bluetooth_BluetoothLeAudioCodecConfig.constructor,
                     (jint)codecConfig.codec_type, 0, 0, 0, 0, 0, 0, 0, 0);
  return codecConfigObj;
}

jobjectArray prepareArrayOfCodecConfigs(
    JNIEnv* env, std::vector<btle_audio_codec_config_t> codecConfigs) {
  jsize i = 0;
  jobjectArray CodecConfigArray = env->NewObjectArray(
      (jsize)codecConfigs.size(),
      android_bluetooth_BluetoothLeAudioCodecConfig.clazz, nullptr);

  for (auto const& cap : codecConfigs) {
    jobject Obj = prepareCodecConfigObj(env, cap);

    env->SetObjectArrayElement(CodecConfigArray, i++, Obj);
    env->DeleteLocalRef(Obj);
  }

  return CodecConfigArray;
}

class LeAudioClientCallbacksImpl : public LeAudioClientCallbacks {
 public:
  ~LeAudioClientCallbacksImpl() = default;

  void OnInitialized(void) override {
    LOG(INFO) << __func__;
    std::shared_lock<std::shared_timed_mutex> lock(callbacks_mutex);
    CallbackEnv sCallbackEnv(__func__);
    if (!sCallbackEnv.valid() || mCallbacksObj == nullptr) return;
    sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onInitialized);
  }

  void OnConnectionState(ConnectionState state,
                         const RawAddress& bd_addr) override {
    LOG(INFO) << __func__ << ", state:" << int(state);

    std::shared_lock<std::shared_timed_mutex> lock(callbacks_mutex);
    CallbackEnv sCallbackEnv(__func__);
    if (!sCallbackEnv.valid() || mCallbacksObj == nullptr) return;

    ScopedLocalRef<jbyteArray> addr(
        sCallbackEnv.get(), sCallbackEnv->NewByteArray(sizeof(RawAddress)));
    if (!addr.get()) {
      LOG(ERROR) << "Failed to new jbyteArray bd addr for connection state";
      return;
    }

    sCallbackEnv->SetByteArrayRegion(addr.get(), 0, sizeof(RawAddress),
                                     (jbyte*)&bd_addr);
    sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onConnectionStateChanged,
                                 (jint)state, addr.get());
  }

  void OnGroupStatus(int group_id, GroupStatus group_status) override {
    LOG(INFO) << __func__;

    std::shared_lock<std::shared_timed_mutex> lock(callbacks_mutex);
    CallbackEnv sCallbackEnv(__func__);
    if (!sCallbackEnv.valid() || mCallbacksObj == nullptr) return;

    sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onGroupStatus,
                                 (jint)group_id, (jint)group_status);
  }

  void OnGroupNodeStatus(const RawAddress& bd_addr, int group_id,
                         GroupNodeStatus node_status) override {
    LOG(INFO) << __func__;

    std::shared_lock<std::shared_timed_mutex> lock(callbacks_mutex);
    CallbackEnv sCallbackEnv(__func__);
    if (!sCallbackEnv.valid() || mCallbacksObj == nullptr) return;

    ScopedLocalRef<jbyteArray> addr(
        sCallbackEnv.get(), sCallbackEnv->NewByteArray(sizeof(RawAddress)));
    if (!addr.get()) {
      LOG(ERROR) << "Failed to new jbyteArray bd addr for group status";
      return;
    }

    sCallbackEnv->SetByteArrayRegion(addr.get(), 0, sizeof(RawAddress),
                                     (jbyte*)&bd_addr);
    sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onGroupNodeStatus,
                                 addr.get(), (jint)group_id, (jint)node_status);
  }

  void OnAudioConf(uint8_t direction, int group_id,
                   uint32_t sink_audio_location, uint32_t source_audio_location,
                   uint16_t avail_cont) override {
    LOG(INFO) << __func__;

    std::shared_lock<std::shared_timed_mutex> lock(callbacks_mutex);
    CallbackEnv sCallbackEnv(__func__);
    if (!sCallbackEnv.valid() || mCallbacksObj == nullptr) return;

    sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onAudioConf,
                                 (jint)direction, (jint)group_id,
                                 (jint)sink_audio_location,
                                 (jint)source_audio_location, (jint)avail_cont);
  }

  void OnSinkAudioLocationAvailable(const RawAddress& bd_addr,
                                    uint32_t sink_audio_location) override {
    LOG(INFO) << __func__;

    std::shared_lock<std::shared_timed_mutex> lock(callbacks_mutex);
    CallbackEnv sCallbackEnv(__func__);
    if (!sCallbackEnv.valid() || mCallbacksObj == nullptr) return;

    ScopedLocalRef<jbyteArray> addr(
        sCallbackEnv.get(), sCallbackEnv->NewByteArray(sizeof(RawAddress)));
    if (!addr.get()) {
      LOG(ERROR) << "Failed to new jbyteArray bd addr for group status";
      return;
    }

    sCallbackEnv->SetByteArrayRegion(addr.get(), 0, sizeof(RawAddress),
                                     (jbyte*)&bd_addr);
    sCallbackEnv->CallVoidMethod(mCallbacksObj,
                                 method_onSinkAudioLocationAvailable,
                                 addr.get(), (jint)sink_audio_location);
  }

  void OnAudioLocalCodecCapabilities(
      std::vector<btle_audio_codec_config_t> local_input_capa_codec_conf,
      std::vector<btle_audio_codec_config_t> local_output_capa_codec_conf)
      override {
    LOG(INFO) << __func__;

    std::shared_lock<std::shared_timed_mutex> lock(callbacks_mutex);
    CallbackEnv sCallbackEnv(__func__);
    if (!sCallbackEnv.valid() || mCallbacksObj == nullptr) return;

    jobject localInputCapCodecConfigArray = prepareArrayOfCodecConfigs(
        sCallbackEnv.get(), local_input_capa_codec_conf);

    jobject localOutputCapCodecConfigArray = prepareArrayOfCodecConfigs(
        sCallbackEnv.get(), local_output_capa_codec_conf);

    sCallbackEnv->CallVoidMethod(
        mCallbacksObj, method_onAudioLocalCodecCapabilities,
        localInputCapCodecConfigArray, localOutputCapCodecConfigArray);
  }

  void OnAudioGroupCodecConf(
      int group_id, btle_audio_codec_config_t input_codec_conf,
      btle_audio_codec_config_t output_codec_conf,
      std::vector<btle_audio_codec_config_t> input_selectable_codec_conf,
      std::vector<btle_audio_codec_config_t> output_selectable_codec_conf)
      override {
    LOG(INFO) << __func__;

    std::shared_lock<std::shared_timed_mutex> lock(callbacks_mutex);
    CallbackEnv sCallbackEnv(__func__);
    if (!sCallbackEnv.valid() || mCallbacksObj == nullptr) return;

    jobject inputCodecConfigObj =
        prepareCodecConfigObj(sCallbackEnv.get(), input_codec_conf);
    jobject outputCodecConfigObj =
        prepareCodecConfigObj(sCallbackEnv.get(), input_codec_conf);
    jobject inputSelectableCodecConfigArray = prepareArrayOfCodecConfigs(
        sCallbackEnv.get(), input_selectable_codec_conf);
    jobject outputSelectableCodecConfigArray = prepareArrayOfCodecConfigs(
        sCallbackEnv.get(), output_selectable_codec_conf);

    sCallbackEnv->CallVoidMethod(
        mCallbacksObj, method_onAudioGroupCodecConf, (jint)group_id,
        inputCodecConfigObj, outputCodecConfigObj,
        inputSelectableCodecConfigArray, outputSelectableCodecConfigArray);
  }
};

static LeAudioClientCallbacksImpl sLeAudioClientCallbacks;

static void classInitNative(JNIEnv* env, jclass clazz) {
  jclass jniBluetoothLeAudioCodecConfigClass =
      env->FindClass("android/bluetooth/BluetoothLeAudioCodecConfig");
  android_bluetooth_BluetoothLeAudioCodecConfig.constructor = env->GetMethodID(
      jniBluetoothLeAudioCodecConfigClass, "<init>", "(IIIIIIIII)V");
  android_bluetooth_BluetoothLeAudioCodecConfig.getCodecType = env->GetMethodID(
      jniBluetoothLeAudioCodecConfigClass, "getCodecType", "()I");

  method_onGroupStatus = env->GetMethodID(clazz, "onGroupStatus", "(II)V");
  method_onGroupNodeStatus =
      env->GetMethodID(clazz, "onGroupNodeStatus", "([BII)V");
  method_onAudioConf = env->GetMethodID(clazz, "onAudioConf", "(IIIII)V");
  method_onSinkAudioLocationAvailable =
      env->GetMethodID(clazz, "onSinkAudioLocationAvailable", "([BI)V");
  method_onInitialized = env->GetMethodID(clazz, "onInitialized", "()V");
  method_onConnectionStateChanged =
      env->GetMethodID(clazz, "onConnectionStateChanged", "(I[B)V");
  method_onAudioLocalCodecCapabilities =
      env->GetMethodID(clazz, "onAudioLocalCodecCapabilities",
                       "([Landroid/bluetooth/BluetoothLeAudioCodecConfig;"
                       "[Landroid/bluetooth/BluetoothLeAudioCodecConfig;)V");
  method_onAudioGroupCodecConf =
      env->GetMethodID(clazz, "onAudioGroupCodecConf",
                       "(ILandroid/bluetooth/BluetoothLeAudioCodecConfig;"
                       "Landroid/bluetooth/BluetoothLeAudioCodecConfig;"
                       "[Landroid/bluetooth/BluetoothLeAudioCodecConfig;"
                       "[Landroid/bluetooth/BluetoothLeAudioCodecConfig;)V");
}

std::vector<btle_audio_codec_config_t> prepareCodecPreferences(
    JNIEnv* env, jobject object, jobjectArray codecConfigArray) {
  std::vector<btle_audio_codec_config_t> codec_preferences;

  int numConfigs = env->GetArrayLength(codecConfigArray);
  for (int i = 0; i < numConfigs; i++) {
    jobject jcodecConfig = env->GetObjectArrayElement(codecConfigArray, i);
    if (jcodecConfig == nullptr) continue;
    if (!env->IsInstanceOf(
            jcodecConfig,
            android_bluetooth_BluetoothLeAudioCodecConfig.clazz)) {
      ALOGE("%s: Invalid BluetoothLeAudioCodecConfig instance", __func__);
      continue;
    }
    jint codecType = env->CallIntMethod(
        jcodecConfig,
        android_bluetooth_BluetoothLeAudioCodecConfig.getCodecType);

    btle_audio_codec_config_t codec_config = {
        .codec_type = static_cast<btle_audio_codec_index_t>(codecType)};

    codec_preferences.push_back(codec_config);
  }
  return codec_preferences;
}

static void initNative(JNIEnv* env, jobject object,
                       jobjectArray codecOffloadingArray) {
  std::unique_lock<std::shared_timed_mutex> interface_lock(interface_mutex);
  std::unique_lock<std::shared_timed_mutex> callbacks_lock(callbacks_mutex);

  const bt_interface_t* btInf = getBluetoothInterface();
  if (btInf == nullptr) {
    LOG(ERROR) << "Bluetooth module is not loaded";
    return;
  }

  if (mCallbacksObj != nullptr) {
    LOG(INFO) << "Cleaning up LeAudio callback object";
    env->DeleteGlobalRef(mCallbacksObj);
    mCallbacksObj = nullptr;
  }

  if ((mCallbacksObj = env->NewGlobalRef(object)) == nullptr) {
    LOG(ERROR) << "Failed to allocate Global Ref for LeAudio Callbacks";
    return;
  }

  android_bluetooth_BluetoothLeAudioCodecConfig.clazz =
      (jclass)env->NewGlobalRef(
          env->FindClass("android/bluetooth/BluetoothLeAudioCodecConfig"));
  if (android_bluetooth_BluetoothLeAudioCodecConfig.clazz == nullptr) {
    LOG(ERROR) << "Failed to allocate Global Ref for "
                  "BluetoothLeAudioCodecConfig class";
    return;
  }

  sLeAudioClientInterface =
      (LeAudioClientInterface*)btInf->get_profile_interface(
          BT_PROFILE_LE_AUDIO_ID);
  if (sLeAudioClientInterface == nullptr) {
    LOG(ERROR) << "Failed to get Bluetooth LeAudio Interface";
    return;
  }

  std::vector<btle_audio_codec_config_t> codec_offloading =
      prepareCodecPreferences(env, object, codecOffloadingArray);

  sLeAudioClientInterface->Initialize(&sLeAudioClientCallbacks,
                                      codec_offloading);
}

static void cleanupNative(JNIEnv* env, jobject object) {
  std::unique_lock<std::shared_timed_mutex> interface_lock(interface_mutex);
  std::unique_lock<std::shared_timed_mutex> callbacks_lock(callbacks_mutex);

  const bt_interface_t* btInf = getBluetoothInterface();
  if (btInf == nullptr) {
    LOG(ERROR) << "Bluetooth module is not loaded";
    return;
  }

  if (sLeAudioClientInterface != nullptr) {
    sLeAudioClientInterface->Cleanup();
    sLeAudioClientInterface = nullptr;
  }

  env->DeleteGlobalRef(android_bluetooth_BluetoothLeAudioCodecConfig.clazz);
  android_bluetooth_BluetoothLeAudioCodecConfig.clazz = nullptr;

  if (mCallbacksObj != nullptr) {
    env->DeleteGlobalRef(mCallbacksObj);
    mCallbacksObj = nullptr;
  }
}

static jboolean connectLeAudioNative(JNIEnv* env, jobject object,
                                     jbyteArray address) {
  LOG(INFO) << __func__;
  std::shared_lock<std::shared_timed_mutex> lock(interface_mutex);
  if (!sLeAudioClientInterface) return JNI_FALSE;

  jbyte* addr = env->GetByteArrayElements(address, nullptr);
  if (!addr) {
    jniThrowIOException(env, EINVAL);
    return JNI_FALSE;
  }

  RawAddress* tmpraw = (RawAddress*)addr;
  sLeAudioClientInterface->Connect(*tmpraw);
  env->ReleaseByteArrayElements(address, addr, 0);
  return JNI_TRUE;
}

static jboolean disconnectLeAudioNative(JNIEnv* env, jobject object,
                                        jbyteArray address) {
  LOG(INFO) << __func__;
  std::shared_lock<std::shared_timed_mutex> lock(interface_mutex);
  if (!sLeAudioClientInterface) return JNI_FALSE;

  jbyte* addr = env->GetByteArrayElements(address, nullptr);
  if (!addr) {
    jniThrowIOException(env, EINVAL);
    return JNI_FALSE;
  }

  RawAddress* tmpraw = (RawAddress*)addr;
  sLeAudioClientInterface->Disconnect(*tmpraw);
  env->ReleaseByteArrayElements(address, addr, 0);
  return JNI_TRUE;
}

static jboolean groupAddNodeNative(JNIEnv* env, jobject object, jint group_id,
                                   jbyteArray address) {
  std::shared_lock<std::shared_timed_mutex> lock(interface_mutex);
  jbyte* addr = env->GetByteArrayElements(address, nullptr);

  if (!sLeAudioClientInterface) {
    LOG(ERROR) << __func__ << ": Failed to get the Bluetooth LeAudio Interface";
    return JNI_FALSE;
  }

  if (!addr) {
    jniThrowIOException(env, EINVAL);
    return JNI_FALSE;
  }

  RawAddress* tmpraw = (RawAddress*)addr;
  sLeAudioClientInterface->GroupAddNode(group_id, *tmpraw);
  env->ReleaseByteArrayElements(address, addr, 0);

  return JNI_TRUE;
}

static jboolean groupRemoveNodeNative(JNIEnv* env, jobject object,
                                      jint group_id, jbyteArray address) {
  std::shared_lock<std::shared_timed_mutex> lock(interface_mutex);
  if (!sLeAudioClientInterface) {
    LOG(ERROR) << __func__ << ": Failed to get the Bluetooth LeAudio Interface";
    return JNI_FALSE;
  }

  jbyte* addr = env->GetByteArrayElements(address, nullptr);
  if (!addr) {
    jniThrowIOException(env, EINVAL);
    return JNI_FALSE;
  }

  RawAddress* tmpraw = (RawAddress*)addr;
  sLeAudioClientInterface->GroupRemoveNode(group_id, *tmpraw);
  env->ReleaseByteArrayElements(address, addr, 0);
  return JNI_TRUE;
}

static void groupSetActiveNative(JNIEnv* env, jobject object, jint group_id) {
  LOG(INFO) << __func__;
  std::shared_lock<std::shared_timed_mutex> lock(interface_mutex);

  if (!sLeAudioClientInterface) {
    LOG(ERROR) << __func__ << ": Failed to get the Bluetooth LeAudio Interface";
    return;
  }

  sLeAudioClientInterface->GroupSetActive(group_id);
}

static void setCodecConfigPreferenceNative(JNIEnv* env, jobject object,
                                           jint group_id,
                                           jobject inputCodecConfig,
                                           jobject outputCodecConfig) {
  std::shared_lock<std::shared_timed_mutex> lock(interface_mutex);

  if (!env->IsInstanceOf(inputCodecConfig,
                         android_bluetooth_BluetoothLeAudioCodecConfig.clazz) ||
      !env->IsInstanceOf(outputCodecConfig,
                         android_bluetooth_BluetoothLeAudioCodecConfig.clazz)) {
    ALOGE("%s: Invalid BluetoothLeAudioCodecConfig instance", __func__);
    return;
  }

  jint inputCodecType = env->CallIntMethod(
      inputCodecConfig,
      android_bluetooth_BluetoothLeAudioCodecConfig.getCodecType);

  btle_audio_codec_config_t input_codec_config = {
      .codec_type = static_cast<btle_audio_codec_index_t>(inputCodecType)};

  jint outputCodecType = env->CallIntMethod(
      outputCodecConfig,
      android_bluetooth_BluetoothLeAudioCodecConfig.getCodecType);

  btle_audio_codec_config_t output_codec_config = {
      .codec_type = static_cast<btle_audio_codec_index_t>(outputCodecType)};

  sLeAudioClientInterface->SetCodecConfigPreference(
      group_id, input_codec_config, output_codec_config);
}

static void setCcidInformationNative(JNIEnv* env, jobject object, jint ccid,
                                     jint contextType) {
  std::shared_lock<std::shared_timed_mutex> lock(interface_mutex);
  if (!sLeAudioClientInterface) {
    LOG(ERROR) << __func__ << ": Failed to get the Bluetooth LeAudio Interface";
    return;
  }

  sLeAudioClientInterface->SetCcidInformation(ccid, contextType);
}

static void setInCallNative(JNIEnv* env, jobject object, jboolean inCall) {
  std::shared_lock<std::shared_timed_mutex> lock(interface_mutex);
  if (!sLeAudioClientInterface) {
    LOG(ERROR) << __func__ << ": Failed to get the Bluetooth LeAudio Interface";
    return;
  }

  sLeAudioClientInterface->SetInCall(inCall);
}

static JNINativeMethod sMethods[] = {
    {"classInitNative", "()V", (void*)classInitNative},
    {"initNative", "([Landroid/bluetooth/BluetoothLeAudioCodecConfig;)V",
     (void*)initNative},
    {"cleanupNative", "()V", (void*)cleanupNative},
    {"connectLeAudioNative", "([B)Z", (void*)connectLeAudioNative},
    {"disconnectLeAudioNative", "([B)Z", (void*)disconnectLeAudioNative},
    {"groupAddNodeNative", "(I[B)Z", (void*)groupAddNodeNative},
    {"groupRemoveNodeNative", "(I[B)Z", (void*)groupRemoveNodeNative},
    {"groupSetActiveNative", "(I)V", (void*)groupSetActiveNative},
    {"setCodecConfigPreferenceNative",
     "(ILandroid/bluetooth/BluetoothLeAudioCodecConfig;Landroid/bluetooth/"
     "BluetoothLeAudioCodecConfig;)V",
     (void*)setCodecConfigPreferenceNative},
    {"setCcidInformationNative", "(II)V", (void*)setCcidInformationNative},
    {"setInCallNative", "(Z)V", (void*)setInCallNative},
};

/* Le Audio Broadcaster */
static jmethodID method_onBroadcastCreated;
static jmethodID method_onBroadcastDestroyed;
static jmethodID method_onBroadcastStateChanged;
static jmethodID method_onBroadcastMetadataChanged;

static LeAudioBroadcasterInterface* sLeAudioBroadcasterInterface = nullptr;
static std::shared_timed_mutex sBroadcasterInterfaceMutex;

static jobject sBroadcasterCallbacksObj = nullptr;
static std::shared_timed_mutex sBroadcasterCallbacksMutex;

#define VEC_UINT8_TO_UINT32(vec)                                          \
  ((vec.data()[3] << 24) + (vec.data()[2] << 16) + (vec.data()[1] << 8) + \
   vec.data()[0])

size_t RawPacketSize(const std::map<uint8_t, std::vector<uint8_t>>& values) {
  size_t bytes = 0;
  for (auto const& value : values) {
    bytes += (/* ltv_len + ltv_type */ 2 + value.second.size());
  }
  return bytes;
}

jbyteArray prepareRawLtvArray(
    JNIEnv* env, const std::map<uint8_t, std::vector<uint8_t>>& metadata) {
  auto raw_meta_size = RawPacketSize(metadata);

  jbyteArray raw_metadata = env->NewByteArray(raw_meta_size);
  if (!raw_metadata) {
    LOG(ERROR) << "Failed to create new jbyteArray for raw LTV";
    return nullptr;
  }

  jsize offset = 0;
  for (auto const& kv_pair : metadata) {
    // Length
    const jbyte ltv_sz = kv_pair.second.size() + 1;
    env->SetByteArrayRegion(raw_metadata, offset, 1, &ltv_sz);
    offset += 1;
    // Type
    env->SetByteArrayRegion(raw_metadata, offset, 1,
                            (const jbyte*)&kv_pair.first);
    offset += 1;
    // Value
    env->SetByteArrayRegion(raw_metadata, offset, kv_pair.second.size(),
                            (const jbyte*)kv_pair.second.data());
    offset += kv_pair.second.size();
  }

  return raw_metadata;
}

static jlong getAudioLocationOrDefault(
    const std::map<uint8_t, std::vector<uint8_t>>& metadata,
    jlong default_location) {
  if (metadata.count(
          bluetooth::le_audio::kLeAudioCodecLC3TypeAudioChannelAllocation) == 0)
    return default_location;

  auto& vec = metadata.at(
      bluetooth::le_audio::kLeAudioCodecLC3TypeAudioChannelAllocation);
  return VEC_UINT8_TO_UINT32(vec);
}

jobject prepareLeAudioCodecConfigMetadataObject(
    JNIEnv* env, const std::map<uint8_t, std::vector<uint8_t>>& metadata) {
  jlong audio_location = getAudioLocationOrDefault(metadata, -1);
  ScopedLocalRef<jbyteArray> raw_metadata(env,
                                          prepareRawLtvArray(env, metadata));
  if (!raw_metadata.get()) {
    LOG(ERROR) << "Failed to create raw metadata jbyteArray";
    return nullptr;
  }

  jobject obj = env->NewObject(
      android_bluetooth_BluetoothLeAudioCodecConfigMetadata.clazz,
      android_bluetooth_BluetoothLeAudioCodecConfigMetadata.constructor,
      audio_location, raw_metadata.get());

  return obj;
}

jobject prepareLeBroadcastChannelObject(
    JNIEnv* env,
    const bluetooth::le_audio::BasicAudioAnnouncementBisConfig& bis_config) {
  ScopedLocalRef<jobject> meta_object(
      env, prepareLeAudioCodecConfigMetadataObject(
               env, bis_config.codec_specific_params));
  if (!meta_object.get()) {
    LOG(ERROR) << "Failed to create new metadata object for bis config";
    return nullptr;
  }

  jobject obj =
      env->NewObject(android_bluetooth_BluetoothLeBroadcastChannel.clazz,
                     android_bluetooth_BluetoothLeBroadcastChannel.constructor,
                     false, bis_config.bis_index, meta_object.get());

  return obj;
}

jobject prepareLeAudioContentMetadataObject(
    JNIEnv* env, const std::map<uint8_t, std::vector<uint8_t>>& metadata) {
  jstring program_info_str = nullptr;
  if (metadata.count(bluetooth::le_audio::kLeAudioMetadataTypeProgramInfo)) {
    program_info_str = env->NewStringUTF(
        (const char*)(metadata
                          .at(bluetooth::le_audio::
                                  kLeAudioMetadataTypeProgramInfo)
                          .data()));
    if (!program_info_str) {
      LOG(ERROR) << "Failed to create new preset name String for preset name";
      return nullptr;
    }
  }

  jstring language_str = nullptr;
  if (metadata.count(bluetooth::le_audio::kLeAudioMetadataTypeLanguage)) {
    language_str = env->NewStringUTF(
        (const char*)(metadata
                          .at(bluetooth::le_audio::kLeAudioMetadataTypeLanguage)
                          .data()));
    if (!language_str) {
      LOG(ERROR) << "Failed to create new preset name String for language";
      return nullptr;
    }
  }

  // This can be nullptr
  ScopedLocalRef<jbyteArray> raw_metadata(env,
                                          prepareRawLtvArray(env, metadata));
  if (!raw_metadata.get()) {
    LOG(ERROR) << "Failed to create raw_metadata jbyteArray";
    return nullptr;
  }

  jobject obj = env->NewObject(
      android_bluetooth_BluetoothLeAudioContentMetadata.clazz,
      android_bluetooth_BluetoothLeAudioContentMetadata.constructor,
      program_info_str, language_str, raw_metadata.get());

  if (program_info_str) {
    env->DeleteLocalRef(program_info_str);
  }

  if (language_str) {
    env->DeleteLocalRef(language_str);
  }

  return obj;
}

jobject prepareLeBroadcastChannelListObject(
    JNIEnv* env,
    const std::vector<bluetooth::le_audio::BasicAudioAnnouncementBisConfig>&
        bis_configs) {
  jobject array = env->NewObject(java_util_ArrayList.clazz,
                                 java_util_ArrayList.constructor);
  if (!array) {
    LOG(ERROR) << "Failed to create array for subgroups";
    return nullptr;
  }

  for (const auto& el : bis_configs) {
    ScopedLocalRef<jobject> channel_obj(
        env, prepareLeBroadcastChannelObject(env, el));
    if (!channel_obj.get()) {
      LOG(ERROR) << "Failed to create new channel object";
      return nullptr;
    }

    env->CallBooleanMethod(array, java_util_ArrayList.add, channel_obj.get());
  }
  return array;
}

jobject prepareLeBroadcastSubgroupObject(
    JNIEnv* env,
    const bluetooth::le_audio::BasicAudioAnnouncementSubgroup& subgroup) {
  // Serialize codec ID
  jlong jlong_codec_id =
      subgroup.codec_config.codec_id |
      ((jlong)subgroup.codec_config.vendor_company_id << 16) |
      ((jlong)subgroup.codec_config.vendor_codec_id << 32);

  ScopedLocalRef<jobject> codec_config_meta_obj(
      env, prepareLeAudioCodecConfigMetadataObject(
               env, subgroup.codec_config.codec_specific_params));
  if (!codec_config_meta_obj.get()) {
    LOG(ERROR) << "Failed to create new codec config metadata";
    return nullptr;
  }

  ScopedLocalRef<jobject> content_meta_obj(
      env, prepareLeAudioContentMetadataObject(env, subgroup.metadata));
  if (!content_meta_obj.get()) {
    LOG(ERROR) << "Failed to create new codec config metadata";
    return nullptr;
  }

  ScopedLocalRef<jobject> channel_list_obj(
      env, prepareLeBroadcastChannelListObject(env, subgroup.bis_configs));
  if (!channel_list_obj.get()) {
    LOG(ERROR) << "Failed to create new codec config metadata";
    return nullptr;
  }

  // Create the subgroup
  return env->NewObject(
      android_bluetooth_BluetoothLeBroadcastSubgroup.clazz,
      android_bluetooth_BluetoothLeBroadcastSubgroup.constructor,
      jlong_codec_id, codec_config_meta_obj.get(), content_meta_obj.get(),
      channel_list_obj.get());
}

jobject prepareLeBroadcastSubgroupListObject(
    JNIEnv* env,
    const std::vector<bluetooth::le_audio::BasicAudioAnnouncementSubgroup>&
        subgroup_configs) {
  jobject array = env->NewObject(java_util_ArrayList.clazz,
                                 java_util_ArrayList.constructor);
  if (!array) {
    LOG(ERROR) << "Failed to create array for subgroups";
    return nullptr;
  }

  for (const auto& el : subgroup_configs) {
    ScopedLocalRef<jobject> subgroup_obj(
        env, prepareLeBroadcastSubgroupObject(env, el));
    if (!subgroup_obj.get()) {
      LOG(ERROR) << "Failed to create new subgroup object";
      return nullptr;
    }

    env->CallBooleanMethod(array, java_util_ArrayList.add, subgroup_obj.get());
  }
  return array;
}

jobject prepareBluetoothDeviceObject(JNIEnv* env, const RawAddress& addr,
                                     int addr_type) {
  // The address string has to be uppercase or the BluetoothDevice constructor
  // will treat it as invalid.
  auto addr_str = addr.ToString();
  std::transform(addr_str.begin(), addr_str.end(), addr_str.begin(),
                 [](unsigned char c) { return std::toupper(c); });

  ScopedLocalRef<jstring> addr_jstr(env, env->NewStringUTF(addr_str.c_str()));
  if (!addr_jstr.get()) {
    LOG(ERROR) << "Failed to create new preset name String for preset name";
    return nullptr;
  }

  return env->NewObject(android_bluetooth_BluetoothDevice.clazz,
                        android_bluetooth_BluetoothDevice.constructor,
                        addr_jstr.get(), (jint)addr_type);
}

jobject prepareBluetoothLeBroadcastMetadataObject(
    JNIEnv* env,
    const bluetooth::le_audio::BroadcastMetadata& broadcast_metadata) {
  ScopedLocalRef<jobject> device_obj(
      env, prepareBluetoothDeviceObject(env, broadcast_metadata.addr,
                                        broadcast_metadata.addr_type));
  if (!device_obj.get()) {
    LOG(ERROR) << "Failed to create new BluetoothDevice";
    return nullptr;
  }

  ScopedLocalRef<jobject> subgroup_list_obj(
      env,
      prepareLeBroadcastSubgroupListObject(
          env, broadcast_metadata.basic_audio_announcement.subgroup_configs));
  if (!subgroup_list_obj.get()) {
    LOG(ERROR) << "Failed to create new Subgroup array";
    return nullptr;
  }

  // Skip the leading null char bytes
  int nativeCodeSize = 16;
  int nativeCodeLeadingZeros = 0;
  if (broadcast_metadata.broadcast_code) {
    auto& nativeCode = broadcast_metadata.broadcast_code.value();
    nativeCodeLeadingZeros =
        std::find_if(nativeCode.cbegin(), nativeCode.cend(),
                     [](int x) { return x != 0x00; }) -
        nativeCode.cbegin();
    nativeCodeSize = nativeCode.size() - nativeCodeLeadingZeros;
  }

  ScopedLocalRef<jbyteArray> code(env, env->NewByteArray(nativeCodeSize));
  if (!code.get()) {
    LOG(ERROR) << "Failed to create new jbyteArray for the broadcast code";
    return nullptr;
  }

  if (broadcast_metadata.broadcast_code) {
    env->SetByteArrayRegion(
        code.get(), 0, nativeCodeSize,
        (const jbyte*)broadcast_metadata.broadcast_code->data() +
            nativeCodeLeadingZeros);
    CHECK(!env->ExceptionCheck());
  }

  return env->NewObject(
      android_bluetooth_BluetoothLeBroadcastMetadata.clazz,
      android_bluetooth_BluetoothLeBroadcastMetadata.constructor,
      (jint)broadcast_metadata.addr_type, device_obj.get(),
      (jint)broadcast_metadata.adv_sid, (jint)broadcast_metadata.broadcast_id,
      (jint)broadcast_metadata.pa_interval,
      broadcast_metadata.broadcast_code ? true : false,
      broadcast_metadata.broadcast_code ? code.get() : nullptr,
      (jint)broadcast_metadata.basic_audio_announcement.presentation_delay,
      subgroup_list_obj.get());
}

class LeAudioBroadcasterCallbacksImpl : public LeAudioBroadcasterCallbacks {
 public:
  ~LeAudioBroadcasterCallbacksImpl() = default;

  void OnBroadcastCreated(uint32_t broadcast_id, bool success) override {
    LOG(INFO) << __func__;

    std::shared_lock<std::shared_timed_mutex> lock(sBroadcasterCallbacksMutex);
    CallbackEnv sCallbackEnv(__func__);

    if (!sCallbackEnv.valid() || sBroadcasterCallbacksObj == nullptr) return;
    sCallbackEnv->CallVoidMethod(sBroadcasterCallbacksObj,
                                 method_onBroadcastCreated, (jint)broadcast_id,
                                 success ? JNI_TRUE : JNI_FALSE);
  }

  void OnBroadcastDestroyed(uint32_t broadcast_id) override {
    LOG(INFO) << __func__;

    std::shared_lock<std::shared_timed_mutex> lock(sBroadcasterCallbacksMutex);
    CallbackEnv sCallbackEnv(__func__);

    if (!sCallbackEnv.valid() || sBroadcasterCallbacksObj == nullptr) return;
    sCallbackEnv->CallVoidMethod(sBroadcasterCallbacksObj,
                                 method_onBroadcastDestroyed,
                                 (jint)broadcast_id);
  }

  void OnBroadcastStateChanged(uint32_t broadcast_id,
                               BroadcastState state) override {
    LOG(INFO) << __func__;

    std::shared_lock<std::shared_timed_mutex> lock(sBroadcasterCallbacksMutex);
    CallbackEnv sCallbackEnv(__func__);

    if (!sCallbackEnv.valid() || sBroadcasterCallbacksObj == nullptr) return;
    sCallbackEnv->CallVoidMethod(
        sBroadcasterCallbacksObj, method_onBroadcastStateChanged,
        (jint)broadcast_id,
        (jint) static_cast<std::underlying_type<BroadcastState>::type>(state));
  }

  void OnBroadcastMetadataChanged(uint32_t broadcast_id,
                                  const bluetooth::le_audio::BroadcastMetadata&
                                      broadcast_metadata) override {
    LOG(INFO) << __func__;

    std::shared_lock<std::shared_timed_mutex> lock(sBroadcasterCallbacksMutex);
    CallbackEnv sCallbackEnv(__func__);

    ScopedLocalRef<jobject> metadata_obj(
        sCallbackEnv.get(), prepareBluetoothLeBroadcastMetadataObject(
                                sCallbackEnv.get(), broadcast_metadata));

    if (!sCallbackEnv.valid() || sBroadcasterCallbacksObj == nullptr) return;
    sCallbackEnv->CallVoidMethod(sBroadcasterCallbacksObj,
                                 method_onBroadcastMetadataChanged,
                                 (jint)broadcast_id, metadata_obj.get());
  }
};

static LeAudioBroadcasterCallbacksImpl sLeAudioBroadcasterCallbacks;

static void BroadcasterClassInitNative(JNIEnv* env, jclass clazz) {
  method_onBroadcastCreated =
      env->GetMethodID(clazz, "onBroadcastCreated", "(IZ)V");
  method_onBroadcastDestroyed =
      env->GetMethodID(clazz, "onBroadcastDestroyed", "(I)V");
  method_onBroadcastStateChanged =
      env->GetMethodID(clazz, "onBroadcastStateChanged", "(II)V");
  method_onBroadcastMetadataChanged =
      env->GetMethodID(clazz, "onBroadcastMetadataChanged",
                       "(ILandroid/bluetooth/BluetoothLeBroadcastMetadata;)V");

  jclass jniArrayListClass = env->FindClass("java/util/ArrayList");
  java_util_ArrayList.constructor =
      env->GetMethodID(jniArrayListClass, "<init>", "()V");
  java_util_ArrayList.add =
      env->GetMethodID(jniArrayListClass, "add", "(Ljava/lang/Object;)Z");

  jclass jniBluetoothLeAudioCodecConfigMetadataClass =
      env->FindClass("android/bluetooth/BluetoothLeAudioCodecConfigMetadata");
  android_bluetooth_BluetoothLeAudioCodecConfigMetadata.constructor =
      env->GetMethodID(jniBluetoothLeAudioCodecConfigMetadataClass, "<init>",
                       "(J[B)V");

  jclass jniBluetoothLeAudioContentMetadataClass =
      env->FindClass("android/bluetooth/BluetoothLeAudioContentMetadata");
  android_bluetooth_BluetoothLeAudioContentMetadata.constructor =
      env->GetMethodID(jniBluetoothLeAudioContentMetadataClass, "<init>",
                       "(Ljava/lang/String;Ljava/lang/String;[B)V");

  jclass jniBluetoothLeBroadcastChannelClass =
      env->FindClass("android/bluetooth/BluetoothLeBroadcastChannel");
  android_bluetooth_BluetoothLeBroadcastChannel.constructor = env->GetMethodID(
      jniBluetoothLeBroadcastChannelClass, "<init>",
      "(ZILandroid/bluetooth/BluetoothLeAudioCodecConfigMetadata;)V");

  jclass jniBluetoothLeBroadcastSubgroupClass =
      env->FindClass("android/bluetooth/BluetoothLeBroadcastSubgroup");
  android_bluetooth_BluetoothLeBroadcastSubgroup.constructor = env->GetMethodID(
      jniBluetoothLeBroadcastSubgroupClass, "<init>",
      "(JLandroid/bluetooth/BluetoothLeAudioCodecConfigMetadata;"
      "Landroid/bluetooth/BluetoothLeAudioContentMetadata;"
      "Ljava/util/List;)V");

  jclass jniBluetoothDeviceClass =
      env->FindClass("android/bluetooth/BluetoothDevice");
  android_bluetooth_BluetoothDevice.constructor = env->GetMethodID(
      jniBluetoothDeviceClass, "<init>", "(Ljava/lang/String;I)V");

  jclass jniBluetoothLeBroadcastMetadataClass =
      env->FindClass("android/bluetooth/BluetoothLeBroadcastMetadata");
  android_bluetooth_BluetoothLeBroadcastMetadata.constructor = env->GetMethodID(
      jniBluetoothLeBroadcastMetadataClass, "<init>",
      "(ILandroid/bluetooth/BluetoothDevice;IIIZ[BILjava/util/List;)V");
}

static void BroadcasterInitNative(JNIEnv* env, jobject object) {
  std::unique_lock<std::shared_timed_mutex> interface_lock(
      sBroadcasterInterfaceMutex);
  std::unique_lock<std::shared_timed_mutex> callbacks_lock(
      sBroadcasterCallbacksMutex);

  const bt_interface_t* btInf = getBluetoothInterface();
  if (btInf == nullptr) {
    LOG(ERROR) << "Bluetooth module is not loaded";
    return;
  }

  android_bluetooth_BluetoothDevice.clazz = (jclass)env->NewGlobalRef(
      env->FindClass("android/bluetooth/BluetoothDevice"));
  if (android_bluetooth_BluetoothDevice.clazz == nullptr) {
    LOG(ERROR) << "Failed to allocate Global Ref for BluetoothDevice class";
    return;
  }

  java_util_ArrayList.clazz =
      (jclass)env->NewGlobalRef(env->FindClass("java/util/ArrayList"));
  if (java_util_ArrayList.clazz == nullptr) {
    LOG(ERROR) << "Failed to allocate Global Ref for ArrayList class";
    return;
  }

  android_bluetooth_BluetoothLeAudioCodecConfigMetadata.clazz =
      (jclass)env->NewGlobalRef(env->FindClass(
          "android/bluetooth/BluetoothLeAudioCodecConfigMetadata"));
  if (android_bluetooth_BluetoothLeAudioCodecConfigMetadata.clazz == nullptr) {
    LOG(ERROR) << "Failed to allocate Global Ref for "
                  "BluetoothLeAudioCodecConfigMetadata class";
    return;
  }

  android_bluetooth_BluetoothLeAudioContentMetadata.clazz =
      (jclass)env->NewGlobalRef(
          env->FindClass("android/bluetooth/BluetoothLeAudioContentMetadata"));
  if (android_bluetooth_BluetoothLeAudioContentMetadata.clazz == nullptr) {
    LOG(ERROR) << "Failed to allocate Global Ref for "
                  "BluetoothLeAudioContentMetadata class";
    return;
  }

  android_bluetooth_BluetoothLeBroadcastSubgroup.clazz =
      (jclass)env->NewGlobalRef(
          env->FindClass("android/bluetooth/BluetoothLeBroadcastSubgroup"));
  if (android_bluetooth_BluetoothLeBroadcastSubgroup.clazz == nullptr) {
    LOG(ERROR) << "Failed to allocate Global Ref for "
                  "BluetoothLeBroadcastSubgroup class";
    return;
  }

  android_bluetooth_BluetoothLeBroadcastChannel.clazz =
      (jclass)env->NewGlobalRef(
          env->FindClass("android/bluetooth/BluetoothLeBroadcastChannel"));
  if (android_bluetooth_BluetoothLeBroadcastChannel.clazz == nullptr) {
    LOG(ERROR) << "Failed to allocate Global Ref for "
                  "BluetoothLeBroadcastChannel class";
    return;
  }

  android_bluetooth_BluetoothLeBroadcastMetadata.clazz =
      (jclass)env->NewGlobalRef(
          env->FindClass("android/bluetooth/BluetoothLeBroadcastMetadata"));
  if (android_bluetooth_BluetoothLeBroadcastMetadata.clazz == nullptr) {
    LOG(ERROR) << "Failed to allocate Global Ref for "
                  "BluetoothLeBroadcastMetadata class";
    return;
  }

  if (sBroadcasterCallbacksObj != nullptr) {
    LOG(INFO) << "Cleaning up LeAudio Broadcaster callback object";
    env->DeleteGlobalRef(sBroadcasterCallbacksObj);
    sBroadcasterCallbacksObj = nullptr;
  }

  if ((sBroadcasterCallbacksObj = env->NewGlobalRef(object)) == nullptr) {
    LOG(ERROR)
        << "Failed to allocate Global Ref for LeAudio Broadcaster Callbacks";
    return;
  }

  sLeAudioBroadcasterInterface =
      (LeAudioBroadcasterInterface*)btInf->get_profile_interface(
          BT_PROFILE_LE_AUDIO_BROADCASTER_ID);
  if (sLeAudioBroadcasterInterface == nullptr) {
    LOG(ERROR) << "Failed to get Bluetooth LeAudio Broadcaster Interface";
    return;
  }

  sLeAudioBroadcasterInterface->Initialize(&sLeAudioBroadcasterCallbacks);
}

static void BroadcasterStopNative(JNIEnv* env, jobject object) {
  std::unique_lock<std::shared_timed_mutex> interface_lock(
      sBroadcasterInterfaceMutex);

  const bt_interface_t* btInf = getBluetoothInterface();
  if (btInf == nullptr) {
    LOG(ERROR) << "Bluetooth module is not loaded";
    return;
  }

  if (sLeAudioBroadcasterInterface != nullptr)
    sLeAudioBroadcasterInterface->Stop();
}

static void BroadcasterCleanupNative(JNIEnv* env, jobject object) {
  std::unique_lock<std::shared_timed_mutex> interface_lock(
      sBroadcasterInterfaceMutex);
  std::unique_lock<std::shared_timed_mutex> callbacks_lock(
      sBroadcasterCallbacksMutex);

  const bt_interface_t* btInf = getBluetoothInterface();
  if (btInf == nullptr) {
    LOG(ERROR) << "Bluetooth module is not loaded";
    return;
  }

  env->DeleteGlobalRef(java_util_ArrayList.clazz);
  java_util_ArrayList.clazz = nullptr;

  env->DeleteGlobalRef(android_bluetooth_BluetoothDevice.clazz);
  android_bluetooth_BluetoothDevice.clazz = nullptr;

  env->DeleteGlobalRef(
      android_bluetooth_BluetoothLeAudioCodecConfigMetadata.clazz);
  android_bluetooth_BluetoothLeAudioCodecConfigMetadata.clazz = nullptr;

  env->DeleteGlobalRef(android_bluetooth_BluetoothLeAudioContentMetadata.clazz);
  android_bluetooth_BluetoothLeAudioContentMetadata.clazz = nullptr;

  env->DeleteGlobalRef(android_bluetooth_BluetoothLeBroadcastSubgroup.clazz);
  android_bluetooth_BluetoothLeBroadcastSubgroup.clazz = nullptr;

  env->DeleteGlobalRef(android_bluetooth_BluetoothLeBroadcastChannel.clazz);
  android_bluetooth_BluetoothLeBroadcastChannel.clazz = nullptr;

  env->DeleteGlobalRef(android_bluetooth_BluetoothLeBroadcastMetadata.clazz);
  android_bluetooth_BluetoothLeBroadcastMetadata.clazz = nullptr;

  if (sLeAudioBroadcasterInterface != nullptr) {
    sLeAudioBroadcasterInterface->Cleanup();
    sLeAudioBroadcasterInterface = nullptr;
  }

  if (sBroadcasterCallbacksObj != nullptr) {
    env->DeleteGlobalRef(sBroadcasterCallbacksObj);
    sBroadcasterCallbacksObj = nullptr;
  }
}

static void CreateBroadcastNative(JNIEnv* env, jobject object,
                                  jbyteArray metadata,
                                  jbyteArray broadcast_code) {
  LOG(INFO) << __func__;
  std::shared_lock<std::shared_timed_mutex> lock(sBroadcasterInterfaceMutex);
  if (!sLeAudioBroadcasterInterface) return;

  std::array<uint8_t, 16> code_array{0};
  if (broadcast_code) {
    jsize size = env->GetArrayLength(broadcast_code);
    if (size > 16) {
      ALOGE("%s: broadcast code to long", __func__);
      return;
    }

    // Padding with zeros on LSB positions if code is shorter than 16 octets
    env->GetByteArrayRegion(
        broadcast_code, 0, size,
        (jbyte*)code_array.data() + code_array.size() - size);
  }

  jbyte* meta = env->GetByteArrayElements(metadata, nullptr);
  sLeAudioBroadcasterInterface->CreateBroadcast(
      std::vector<uint8_t>(meta, meta + env->GetArrayLength(metadata)),
      broadcast_code ? std::optional<std::array<uint8_t, 16>>(code_array)
                     : std::nullopt);
  env->ReleaseByteArrayElements(metadata, meta, 0);
}

static void UpdateMetadataNative(JNIEnv* env, jobject object, jint broadcast_id,
                                 jbyteArray metadata) {
  jbyte* meta = env->GetByteArrayElements(metadata, nullptr);
  sLeAudioBroadcasterInterface->UpdateMetadata(
      broadcast_id,
      std::vector<uint8_t>(meta, meta + env->GetArrayLength(metadata)));
  env->ReleaseByteArrayElements(metadata, meta, 0);
}

static void StartBroadcastNative(JNIEnv* env, jobject object,
                                 jint broadcast_id) {
  LOG(INFO) << __func__;
  std::shared_lock<std::shared_timed_mutex> lock(sBroadcasterInterfaceMutex);
  if (!sLeAudioBroadcasterInterface) return;
  sLeAudioBroadcasterInterface->StartBroadcast(broadcast_id);
}

static void StopBroadcastNative(JNIEnv* env, jobject object,
                                jint broadcast_id) {
  LOG(INFO) << __func__;
  std::shared_lock<std::shared_timed_mutex> lock(sBroadcasterInterfaceMutex);
  if (!sLeAudioBroadcasterInterface) return;
  sLeAudioBroadcasterInterface->StopBroadcast(broadcast_id);
}

static void PauseBroadcastNative(JNIEnv* env, jobject object,
                                 jint broadcast_id) {
  LOG(INFO) << __func__;
  std::shared_lock<std::shared_timed_mutex> lock(sBroadcasterInterfaceMutex);
  if (!sLeAudioBroadcasterInterface) return;
  sLeAudioBroadcasterInterface->PauseBroadcast(broadcast_id);
}

static void DestroyBroadcastNative(JNIEnv* env, jobject object,
                                   jint broadcast_id) {
  LOG(INFO) << __func__;
  std::shared_lock<std::shared_timed_mutex> lock(sBroadcasterInterfaceMutex);
  if (!sLeAudioBroadcasterInterface) return;
  sLeAudioBroadcasterInterface->DestroyBroadcast(broadcast_id);
}

static void getBroadcastMetadataNative(JNIEnv* env, jobject object,
                                       jint broadcast_id) {
  LOG(INFO) << __func__;
  std::shared_lock<std::shared_timed_mutex> lock(sBroadcasterInterfaceMutex);
  if (!sLeAudioBroadcasterInterface) return;
  sLeAudioBroadcasterInterface->GetBroadcastMetadata(broadcast_id);
}

static JNINativeMethod sBroadcasterMethods[] = {
    {"classInitNative", "()V", (void*)BroadcasterClassInitNative},
    {"initNative", "()V", (void*)BroadcasterInitNative},
    {"stopNative", "()V", (void*)BroadcasterStopNative},
    {"cleanupNative", "()V", (void*)BroadcasterCleanupNative},
    {"createBroadcastNative", "([B[B)V", (void*)CreateBroadcastNative},
    {"updateMetadataNative", "(I[B)V", (void*)UpdateMetadataNative},
    {"startBroadcastNative", "(I)V", (void*)StartBroadcastNative},
    {"stopBroadcastNative", "(I)V", (void*)StopBroadcastNative},
    {"pauseBroadcastNative", "(I)V", (void*)PauseBroadcastNative},
    {"destroyBroadcastNative", "(I)V", (void*)DestroyBroadcastNative},
    {"getBroadcastMetadataNative", "(I)V", (void*)getBroadcastMetadataNative},
};

int register_com_android_bluetooth_le_audio(JNIEnv* env) {
  int register_success = jniRegisterNativeMethods(
      env, "com/android/bluetooth/le_audio/LeAudioNativeInterface", sMethods,
      NELEM(sMethods));
  return register_success &
         jniRegisterNativeMethods(
             env,
             "com/android/bluetooth/le_audio/LeAudioBroadcasterNativeInterface",
             sBroadcasterMethods, NELEM(sBroadcasterMethods));
}
}  // namespace android