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/*
* Copyright (C) 2014 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 "Fingerprint-JNI"
#include "JNIHelp.h"
#include <android_runtime/AndroidRuntime.h>
#include <android_runtime/Log.h>
#include <hardware/hardware.h>
#include <hardware/fingerprint.h>
#include <utils/Log.h>
#define FIND_CLASS(var, className) \
var = env->FindClass(className); \
LOG_FATAL_IF(! var, "Unable to find class " className); \
var = jclass(env->NewGlobalRef(var));
#define GET_STATIC_METHOD_ID(var, clazz, methodName, fieldDescriptor) \
var = env->GetStaticMethodID(clazz, methodName, fieldDescriptor); \
LOG_FATAL_IF(! var, "Unable to find static method" methodName);
#define GET_METHOD_ID(var, clazz, methodName, fieldDescriptor) \
var = env->GetMethodID(clazz, methodName, fieldDescriptor); \
LOG_FATAL_IF(! var, "Unable to find method" methodName);
#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
LOG_FATAL_IF(! var, "Unable to find field " fieldName);
namespace android {
static const uint16_t kVersion = HARDWARE_MODULE_API_VERSION(1, 0);
static const char* FINGERPRINT_SERVICE = "com/android/server/fingerprint/FingerprintService";
static struct {
jclass clazz;
jmethodID notify;
jobject callbackObject;
} gFingerprintServiceClassInfo;
static struct {
fingerprint_module_t const* module;
fingerprint_device_t *device;
} gContext;
// Called by the HAL to notify us of fingerprint events
static void hal_notify_callback(fingerprint_msg_t msg) {
uint32_t arg1 = 0;
uint32_t arg2 = 0;
uint32_t arg3 = 0; // TODO
switch (msg.type) {
case FINGERPRINT_ERROR:
arg1 = msg.data.error;
break;
case FINGERPRINT_ACQUIRED:
arg1 = msg.data.acquired.acquired_info;
break;
case FINGERPRINT_PROCESSED:
arg1 = msg.data.processed.id;
break;
case FINGERPRINT_TEMPLATE_ENROLLING:
arg1 = msg.data.enroll.id;
arg2 = msg.data.enroll.samples_remaining;
arg3 = msg.data.enroll.data_collected_bmp;
break;
case FINGERPRINT_TEMPLATE_REMOVED:
arg1 = msg.data.removed.id;
break;
default:
ALOGE("fingerprint: invalid msg: %d", msg.type);
return;
}
//ALOG(LOG_VERBOSE, LOG_TAG, "hal_notify(msg=%d, arg1=%d, arg2=%d)\n", msg.type, arg1, arg2);
// TODO: fix gross hack to attach JNI to calling thread
JNIEnv* env = AndroidRuntime::getJNIEnv();
if (env == NULL) {
JavaVMAttachArgs args = {JNI_VERSION_1_4, NULL, NULL};
JavaVM* vm = AndroidRuntime::getJavaVM();
int result = vm->AttachCurrentThread(&env, (void*) &args);
if (result != JNI_OK) {
ALOGE("Can't call JNI method: attach failed: %#x", result);
return;
}
}
env->CallVoidMethod(gFingerprintServiceClassInfo.callbackObject,
gFingerprintServiceClassInfo.notify, msg.type, arg1, arg2);
}
static void nativeInit(JNIEnv *env, jobject clazz, jobject callbackObj) {
ALOG(LOG_VERBOSE, LOG_TAG, "nativeInit()\n");
FIND_CLASS(gFingerprintServiceClassInfo.clazz, FINGERPRINT_SERVICE);
GET_METHOD_ID(gFingerprintServiceClassInfo.notify, gFingerprintServiceClassInfo.clazz,
"notify", "(III)V");
gFingerprintServiceClassInfo.callbackObject = env->NewGlobalRef(callbackObj);
}
static jint nativeEnroll(JNIEnv* env, jobject clazz, jint timeout) {
ALOG(LOG_VERBOSE, LOG_TAG, "nativeEnroll()\n");
int ret = gContext.device->enroll(gContext.device, timeout);
return reinterpret_cast<jint>(ret);
}
static jint nativeEnrollCancel(JNIEnv* env, jobject clazz) {
ALOG(LOG_VERBOSE, LOG_TAG, "nativeEnrollCancel()\n");
int ret = gContext.device->enroll_cancel(gContext.device);
return reinterpret_cast<jint>(ret);
}
static jint nativeRemove(JNIEnv* env, jobject clazz, jint fingerprintId) {
ALOG(LOG_VERBOSE, LOG_TAG, "nativeRemove(%d)\n", fingerprintId);
int ret = gContext.device->remove(gContext.device, fingerprintId);
return reinterpret_cast<jint>(ret);
}
static jint nativeOpenHal(JNIEnv* env, jobject clazz) {
ALOG(LOG_VERBOSE, LOG_TAG, "nativeOpenHal()\n");
int err;
const hw_module_t *hw_module = NULL;
if (0 != (err = hw_get_module(FINGERPRINT_HARDWARE_MODULE_ID, &hw_module))) {
ALOGE("Can't open fingerprint HW Module, error: %d", err);
return 0;
}
if (NULL == hw_module) {
ALOGE("No valid fingerprint module");
return 0;
}
gContext.module = reinterpret_cast<const fingerprint_module_t*>(hw_module);
if (gContext.module->common.methods->open == NULL) {
ALOGE("No valid open method");
return 0;
}
hw_device_t *device = NULL;
if (0 != (err = gContext.module->common.methods->open(hw_module, NULL, &device))) {
ALOGE("Can't open fingerprint methods, error: %d", err);
return 0;
}
if (kVersion != device->version) {
ALOGE("Wrong fp version. Expected %d, got %d", kVersion, device->version);
// return 0; // FIXME
}
gContext.device = reinterpret_cast<fingerprint_device_t*>(device);
err = gContext.device->set_notify(gContext.device, hal_notify_callback);
if (err < 0) {
ALOGE("Failed in call to set_notify(), err=%d", err);
return 0;
}
// Sanity check - remove
if (gContext.device->notify != hal_notify_callback) {
ALOGE("NOTIFY not set properly: %p != %p", gContext.device->notify, hal_notify_callback);
}
ALOG(LOG_VERBOSE, LOG_TAG, "fingerprint HAL successfully initialized");
return reinterpret_cast<jlong>(gContext.device);
}
static jint nativeCloseHal(JNIEnv* env, jobject clazz) {
return -ENOSYS; // TODO
}
// ----------------------------------------------------------------------------
// TODO: clean up void methods
static const JNINativeMethod g_methods[] = {
{ "nativeEnroll", "(I)I", (void*)nativeEnroll },
{ "nativeEnrollCancel", "()I", (void*)nativeEnroll },
{ "nativeRemove", "(I)I", (void*)nativeRemove },
{ "nativeOpenHal", "()I", (void*)nativeOpenHal },
{ "nativeCloseHal", "()I", (void*)nativeCloseHal },
{ "nativeInit", "(Lcom/android/server/fingerprint/FingerprintService;)V", (void*)nativeInit }
};
int register_android_server_fingerprint_FingerprintService(JNIEnv* env) {
FIND_CLASS(gFingerprintServiceClassInfo.clazz, FINGERPRINT_SERVICE);
GET_METHOD_ID(gFingerprintServiceClassInfo.notify, gFingerprintServiceClassInfo.clazz, "notify",
"(III)V");
int result = AndroidRuntime::registerNativeMethods(
env, FINGERPRINT_SERVICE, g_methods, NELEM(g_methods));
ALOG(LOG_VERBOSE, LOG_TAG, "FingerprintManager JNI ready.\n");
return result;
}
} // namespace android
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