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Commit cf27f0dd authored by Hemant Gupta's avatar Hemant Gupta Committed by Ivan Podogov
Browse files

HIDD: Add support for HID Device Role 

This patch adds support for HID Device Role which enables phone being
used as a Bluetooth keyboad or mouse.

Change-Id: I931867442111ad997a34a166c7b2ec1daf317ddd
parent 6621044f

AndroidManifest.xml

+7 −0
Original line number Diff line number Diff line
@@ -394,5 +394,12 @@ 
                android:name="android.accounts.AccountAuthenticator"

                android:resource="@xml/authenticator" />

        </service>

        <service

            android:name = ".hid.HidDevService"

            android:enabled="@bool/profile_supported_hidd">

            <intent-filter>

                <action android:name="android.bluetooth.IBluetoothHidDevice" />

            </intent-filter>

        </service>

    </application>

</manifest>

jni/Android.mk

+1 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ LOCAL_SRC_FILES:= \ 
    com_android_bluetooth_avrcp.cpp \

    com_android_bluetooth_avrcp_controller.cpp \

    com_android_bluetooth_hid.cpp \

    com_android_bluetooth_hidd.cpp \

    com_android_bluetooth_hdp.cpp \

    com_android_bluetooth_pan.cpp \

    com_android_bluetooth_gatt.cpp \

jni/com_android_bluetooth.h

+2 −0
Original line number Diff line number Diff line
@@ -84,6 +84,8 @@ int register_com_android_bluetooth_avrcp_controller(JNIEnv* env); 


int register_com_android_bluetooth_hid(JNIEnv* env);



int register_com_android_bluetooth_hidd(JNIEnv* env);



int register_com_android_bluetooth_hdp(JNIEnv* env);



int register_com_android_bluetooth_pan(JNIEnv* env);

jni/com_android_bluetooth_btservice_AdapterService.cpp

+6 −0
Original line number Diff line number Diff line
@@ -1321,6 +1321,12 @@ jint JNI_OnLoad(JavaVM* jvm, void* reserved) { 
    return JNI_ERR;

  }



  status = android::register_com_android_bluetooth_hidd(e);

  if (status < 0) {

    ALOGE("jni hidd registration failure: %d", status);

    return JNI_ERR;

  }



  status = android::register_com_android_bluetooth_hdp(e);

  if (status < 0) {

    ALOGE("jni hdp registration failure: %d", status);

jni/com_android_bluetooth_hidd.cpp

0 → 100644
+504 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2016 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_TAG "BluetoothHidDevServiceJni"



#define LOG_NDEBUG 0



#define CHECK_CALLBACK_ENV                                                     \

  if (!checkCallbackThread()) {                                                \

    ALOGE("Callback: '%s' is not called on the correct thread", __FUNCTION__); \

    return;                                                                    \

  }



#include "android_runtime/AndroidRuntime.h"

#include "com_android_bluetooth.h"

#include "hardware/bt_hd.h"

#include "utils/Log.h"



#include <string.h>



namespace android {



static jmethodID method_onApplicationStateChanged;

static jmethodID method_onConnectStateChanged;

static jmethodID method_onGetReport;

static jmethodID method_onSetReport;

static jmethodID method_onSetProtocol;

static jmethodID method_onIntrData;

static jmethodID method_onVirtualCableUnplug;



static const bthd_interface_t* sHiddIf = NULL;

static jobject mCallbacksObj = NULL;

static JNIEnv* sCallbackEnv = NULL;



static bool checkCallbackThread() {

  sCallbackEnv = getCallbackEnv();



  if (sCallbackEnv != AndroidRuntime::getJNIEnv() || sCallbackEnv == NULL) {

    return false;

  }



  return true;

}



static void application_state_callback(bt_bdaddr_t* bd_addr,

                                       bthd_application_state_t state) {

  jboolean registered = JNI_FALSE;

  jbyteArray addr;



  CHECK_CALLBACK_ENV



  if (state == BTHD_APP_STATE_REGISTERED) {

    registered = JNI_TRUE;

  }



  if (bd_addr) {

    addr = sCallbackEnv->NewByteArray(sizeof(bt_bdaddr_t));

    if (!addr) {

      ALOGE("%s: failed to allocate storage for bt_addr", __FUNCTION__);

      return;

    }

    sCallbackEnv->SetByteArrayRegion(addr, 0, sizeof(bt_bdaddr_t),

                                     (jbyte*)bd_addr);

  } else {

    addr = NULL;

  }



  sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onApplicationStateChanged,

                               addr, registered);



  if (addr) {

    sCallbackEnv->DeleteLocalRef(addr);

  }

}



static void connection_state_callback(bt_bdaddr_t* bd_addr,

                                      bthd_connection_state_t state) {

  jbyteArray addr;



  CHECK_CALLBACK_ENV



  addr = sCallbackEnv->NewByteArray(sizeof(bt_bdaddr_t));

  if (!addr) {

    ALOGE("%s: failed to allocate storage for bt_addr", __FUNCTION__);

    return;

  }

  sCallbackEnv->SetByteArrayRegion(addr, 0, sizeof(bt_bdaddr_t),

                                   (jbyte*)bd_addr);



  sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onConnectStateChanged,

                               addr, (jint)state);



  sCallbackEnv->DeleteLocalRef(addr);

}



static void get_report_callback(uint8_t type, uint8_t id,

                                uint16_t buffer_size) {

  CHECK_CALLBACK_ENV



  sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onGetReport, type, id,

                               buffer_size);

}



static void set_report_callback(uint8_t type, uint8_t id, uint16_t len,

                                uint8_t* p_data) {

  jbyteArray data;



  CHECK_CALLBACK_ENV



  data = sCallbackEnv->NewByteArray(len);

  if (!data) {

    ALOGE("%s: failed to allocate storage for report data", __FUNCTION__);

    return;

  }

  sCallbackEnv->SetByteArrayRegion(data, 0, len, (jbyte*)p_data);



  sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onSetReport, (jbyte)type,

                               (jbyte)id, data);



  sCallbackEnv->DeleteLocalRef(data);

}



static void set_protocol_callback(uint8_t protocol) {

  CHECK_CALLBACK_ENV



  sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onSetProtocol, protocol);

}



static void intr_data_callback(uint8_t report_id, uint16_t len,

                               uint8_t* p_data) {

  jbyteArray data;



  CHECK_CALLBACK_ENV



  data = sCallbackEnv->NewByteArray(len);

  if (!data) {

    ALOGE("%s: failed to allocate storage for report data", __FUNCTION__);

    return;

  }

  sCallbackEnv->SetByteArrayRegion(data, 0, len, (jbyte*)p_data);



  sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onIntrData,

                               (jbyte)report_id, data);



  sCallbackEnv->DeleteLocalRef(data);

}



static void vc_unplug_callback(void) {

  CHECK_CALLBACK_ENV



  sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onVirtualCableUnplug);

}



static bthd_callbacks_t sHiddCb = {

    sizeof(sHiddCb),



    application_state_callback,

    connection_state_callback,

    get_report_callback,

    set_report_callback,

    set_protocol_callback,

    intr_data_callback,

    vc_unplug_callback,

};



static void classInitNative(JNIEnv* env, jclass clazz) {

  ALOGV("%s: done", __FUNCTION__);



  method_onApplicationStateChanged =

      env->GetMethodID(clazz, "onApplicationStateChanged", "([BZ)V");

  method_onConnectStateChanged =

      env->GetMethodID(clazz, "onConnectStateChanged", "([BI)V");

  method_onGetReport = env->GetMethodID(clazz, "onGetReport", "(BBS)V");

  method_onSetReport = env->GetMethodID(clazz, "onSetReport", "(BB[B)V");

  method_onSetProtocol = env->GetMethodID(clazz, "onSetProtocol", "(B)V");

  method_onIntrData = env->GetMethodID(clazz, "onIntrData", "(B[B)V");

  method_onVirtualCableUnplug =

      env->GetMethodID(clazz, "onVirtualCableUnplug", "()V");

}



static void initNative(JNIEnv* env, jobject object) {

  const bt_interface_t* btif;

  bt_status_t status;



  ALOGV("%s enter", __FUNCTION__);



  if ((btif = getBluetoothInterface()) == NULL) {

    ALOGE("Cannot obtain BT interface");

    return;

  }



  if (sHiddIf != NULL) {

    ALOGW("Cleaning up interface");

    sHiddIf->cleanup();

    sHiddIf = NULL;

  }



  if (mCallbacksObj != NULL) {

    ALOGW("Cleaning up callback object");

    env->DeleteGlobalRef(mCallbacksObj);

    mCallbacksObj = NULL;

  }



  if ((sHiddIf = (bthd_interface_t*)btif->get_profile_interface(

           BT_PROFILE_HIDDEV_ID)) == NULL) {

    ALOGE("Cannot obtain interface");

    return;

  }



  if ((status = sHiddIf->init(&sHiddCb)) != BT_STATUS_SUCCESS) {

    ALOGE("Failed to initialize interface (%d)", status);

    sHiddIf = NULL;

    return;

  }



  mCallbacksObj = env->NewGlobalRef(object);



  ALOGV("%s done", __FUNCTION__);

}



static void cleanupNative(JNIEnv* env, jobject object) {

  ALOGV("%s enter", __FUNCTION__);



  if (sHiddIf != NULL) {

    ALOGI("Cleaning up interface");

    sHiddIf->cleanup();

    sHiddIf = NULL;

  }



  if (mCallbacksObj != NULL) {

    ALOGI("Cleaning up callback object");

    env->DeleteGlobalRef(mCallbacksObj);

    mCallbacksObj = NULL;

  }



  ALOGV("%s done", __FUNCTION__);

}



static void fill_qos(JNIEnv* env, jintArray in, bthd_qos_param_t* out) {

  // set default values

  out->service_type = 0x01;  // best effort

  out->token_rate = out->token_bucket_size = out->peak_bandwidth =

      0;                                                    // don't care

  out->access_latency = out->delay_variation = 0xffffffff;  // don't care



  if (in == NULL) return;



  jsize len = env->GetArrayLength(in);



  if (len != 6) return;



  uint32_t* buf = (uint32_t*)calloc(len, sizeof(uint32_t));



  if (buf == NULL) return;



  env->GetIntArrayRegion(in, 0, len, (jint*)buf);



  out->service_type = (uint8_t)buf[0];

  out->token_rate = buf[1];

  out->token_bucket_size = buf[2];

  out->peak_bandwidth = buf[3];

  out->access_latency = buf[4];

  out->delay_variation = buf[5];



  free(buf);

}



static jboolean registerAppNative(JNIEnv* env, jobject thiz, jstring name,

                                  jstring description, jstring provider,

                                  jbyte subclass, jbyteArray descriptors,

                                  jintArray p_in_qos, jintArray p_out_qos) {

  ALOGV("%s enter", __FUNCTION__);



  jboolean result = JNI_FALSE;

  bthd_app_param_t app_param;

  bthd_qos_param_t in_qos;

  bthd_qos_param_t out_qos;

  jsize size;

  uint8_t* data;



  size = env->GetArrayLength(descriptors);

  data = (uint8_t*)malloc(size);



  if (data != NULL) {

    env->GetByteArrayRegion(descriptors, 0, size, (jbyte*)data);



    app_param.name = env->GetStringUTFChars(name, NULL);

    app_param.description = env->GetStringUTFChars(description, NULL);

    app_param.provider = env->GetStringUTFChars(provider, NULL);

    app_param.subclass = subclass;

    app_param.desc_list = data;

    app_param.desc_list_len = size;



    fill_qos(env, p_in_qos, &in_qos);

    fill_qos(env, p_out_qos, &out_qos);



    bt_status_t ret = sHiddIf->register_app(&app_param, &in_qos, &out_qos);



    ALOGV("%s: register_app() returned %d", __FUNCTION__, ret);



    if (ret == BT_STATUS_SUCCESS) {

      result = JNI_TRUE;

    }



    env->ReleaseStringUTFChars(name, app_param.name);

    env->ReleaseStringUTFChars(description, app_param.description);

    env->ReleaseStringUTFChars(provider, app_param.provider);



    free(data);

  }



  ALOGV("%s done (%d)", __FUNCTION__, result);



  return result;

}



static jboolean unregisterAppNative(JNIEnv* env, jobject thiz) {

  ALOGV("%s enter", __FUNCTION__);



  jboolean result = JNI_FALSE;



  bt_status_t ret = sHiddIf->unregister_app();



  ALOGV("%s: unregister_app() returned %d", __FUNCTION__, ret);



  if (ret == BT_STATUS_SUCCESS) {

    result = JNI_TRUE;

  }



  ALOGV("%s done (%d)", __FUNCTION__, result);



  return result;

}



static jboolean sendReportNative(JNIEnv* env, jobject thiz, jint id,

                                 jbyteArray data) {

  ALOGV("%s enter", __FUNCTION__);



  jboolean result = JNI_FALSE;

  jsize size;

  uint8_t* buf;



  size = env->GetArrayLength(data);

  buf = (uint8_t*)malloc(size);



  if (buf != NULL) {

    env->GetByteArrayRegion(data, 0, size, (jbyte*)buf);



    bt_status_t ret =

        sHiddIf->send_report(BTHD_REPORT_TYPE_INTRDATA, id, size, buf);



    ALOGV("%s: send_report() returned %d", __FUNCTION__, ret);



    if (ret == BT_STATUS_SUCCESS) {

      result = JNI_TRUE;

    }



    free(buf);

  }



  ALOGV("%s done (%d)", __FUNCTION__, result);



  return result;

}



static jboolean replyReportNative(JNIEnv* env, jobject thiz, jbyte type,

                                  jbyte id, jbyteArray data) {

  ALOGV("%s enter", __FUNCTION__);



  jboolean result = JNI_FALSE;

  jsize size;

  uint8_t* buf;



  size = env->GetArrayLength(data);

  buf = (uint8_t*)malloc(size);



  if (buf != NULL) {

    int report_type = (type & 0x03);

    env->GetByteArrayRegion(data, 0, size, (jbyte*)buf);



    bt_status_t ret =

        sHiddIf->send_report((bthd_report_type_t)report_type, id, size, buf);



    ALOGV("%s: send_report() returned %d", __FUNCTION__, ret);



    if (ret == BT_STATUS_SUCCESS) {

      result = JNI_TRUE;

    }



    free(buf);

  }



  ALOGV("%s done (%d)", __FUNCTION__, result);



  return result;

}



static jboolean reportErrorNative(JNIEnv* env, jobject thiz, jbyte error) {

  ALOGV("%s enter", __FUNCTION__);



  jboolean result = JNI_FALSE;



  bt_status_t ret = sHiddIf->report_error(error);



  ALOGV("%s: report_error() returned %d", __FUNCTION__, ret);



  if (ret == BT_STATUS_SUCCESS) {

    result = JNI_TRUE;

  }



  ALOGV("%s done (%d)", __FUNCTION__, result);



  return result;

}



static jboolean unplugNative(JNIEnv* env, jobject thiz) {

  ALOGV("%s enter", __FUNCTION__);



  jboolean result = JNI_FALSE;



  bt_status_t ret = sHiddIf->virtual_cable_unplug();



  ALOGV("%s: virtual_cable_unplug() returned %d", __FUNCTION__, ret);



  if (ret == BT_STATUS_SUCCESS) {

    result = JNI_TRUE;

  }



  ALOGV("%s done (%d)", __FUNCTION__, result);



  return result;

}



static jboolean connectNative(JNIEnv* env, jobject thiz) {

  ALOGV("%s enter", __FUNCTION__);



  jboolean result = JNI_FALSE;



  bt_status_t ret = sHiddIf->connect();



  ALOGV("%s: connect() returned %d", __FUNCTION__, ret);



  if (ret == BT_STATUS_SUCCESS) {

    result = JNI_TRUE;

  }



  ALOGV("%s done (%d)", __FUNCTION__, result);



  return result;

}



static jboolean disconnectNative(JNIEnv* env, jobject thiz) {

  ALOGV("%s enter", __FUNCTION__);



  jboolean result = JNI_FALSE;



  bt_status_t ret = sHiddIf->disconnect();



  ALOGV("%s: disconnect() returned %d", __FUNCTION__, ret);



  if (ret == BT_STATUS_SUCCESS) {

    result = JNI_TRUE;

  }



  ALOGV("%s done (%d)", __FUNCTION__, result);



  return result;

}



static JNINativeMethod sMethods[] = {

    {"classInitNative", "()V", (void*)classInitNative},

    {"initNative", "()V", (void*)initNative},

    {"cleanupNative", "()V", (void*)cleanupNative},

    {"registerAppNative",

     "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;B[B[I[I)Z",

     (void*)registerAppNative},

    {"unregisterAppNative", "()Z", (void*)unregisterAppNative},

    {"sendReportNative", "(I[B)Z", (void*)sendReportNative},

    {"replyReportNative", "(BB[B)Z", (void*)replyReportNative},

    {"reportErrorNative", "(B)Z", (void*)reportErrorNative},

    {"unplugNative", "()Z", (void*)unplugNative},

    {"connectNative", "()Z", (void*)connectNative},

    {"disconnectNative", "()Z", (void*)disconnectNative},

};



int register_com_android_bluetooth_hidd(JNIEnv* env) {

  return jniRegisterNativeMethods(env,

                                  "com/android/bluetooth/hid/HidDevService",

                                  sMethods, NELEM(sMethods));

}

}