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/*
* Copyright (C) 2008 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 "GpsLocationProvider"
//#define LOG_NDEBUG 0
#include "JNIHelp.h"
#include "jni.h"
#include "hardware/hardware.h"
#include "hardware/gps.h"
#include "hardware_legacy/power.h"
#include "utils/Log.h"
#include "utils/misc.h"
#include "android_runtime/AndroidRuntime.h"
#include <string.h>
#include <pthread.h>
static jobject mCallbacksObj = NULL;
static jmethodID method_reportLocation;
static jmethodID method_reportStatus;
static jmethodID method_reportSvStatus;
static jmethodID method_reportAGpsStatus;
static jmethodID method_reportNmea;
static jmethodID method_setEngineCapabilities;
static jmethodID method_xtraDownloadRequest;
static jmethodID method_reportNiNotification;
static const GpsInterface* sGpsInterface = NULL;
static const GpsXtraInterface* sGpsXtraInterface = NULL;
static const AGpsInterface* sAGpsInterface = NULL;
static const GpsNiInterface* sGpsNiInterface = NULL;
static const GpsDebugInterface* sGpsDebugInterface = NULL;
// temporary storage for GPS callbacks
static GpsSvStatus sGpsSvStatus;
static const char* sNmeaString;
static int sNmeaStringLength;
#define WAKE_LOCK_NAME "GPS"
namespace android {
static void checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName) {
if (env->ExceptionCheck()) {
LOGE("An exception was thrown by callback '%s'.", methodName);
LOGE_EX(env);
env->ExceptionClear();
}
}
static void location_callback(GpsLocation* location)
{
JNIEnv* env = AndroidRuntime::getJNIEnv();
env->CallVoidMethod(mCallbacksObj, method_reportLocation, location->flags,
(jdouble)location->latitude, (jdouble)location->longitude,
(jdouble)location->altitude,
(jfloat)location->speed, (jfloat)location->bearing,
(jfloat)location->accuracy, (jlong)location->timestamp);
checkAndClearExceptionFromCallback(env, __FUNCTION__);
}
static void status_callback(GpsStatus* status)
{
JNIEnv* env = AndroidRuntime::getJNIEnv();
env->CallVoidMethod(mCallbacksObj, method_reportStatus, status->status);
checkAndClearExceptionFromCallback(env, __FUNCTION__);
}
static void sv_status_callback(GpsSvStatus* sv_status)
{
JNIEnv* env = AndroidRuntime::getJNIEnv();
memcpy(&sGpsSvStatus, sv_status, sizeof(sGpsSvStatus));
env->CallVoidMethod(mCallbacksObj, method_reportSvStatus);
checkAndClearExceptionFromCallback(env, __FUNCTION__);
}
static void nmea_callback(GpsUtcTime timestamp, const char* nmea, int length)
{
JNIEnv* env = AndroidRuntime::getJNIEnv();
// The Java code will call back to read these values
// We do this to avoid creating unnecessary String objects
sNmeaString = nmea;
sNmeaStringLength = length;
env->CallVoidMethod(mCallbacksObj, method_reportNmea, timestamp);
checkAndClearExceptionFromCallback(env, __FUNCTION__);
}
static void set_capabilities_callback(uint32_t capabilities)
{
JNIEnv* env = AndroidRuntime::getJNIEnv();
env->CallVoidMethod(mCallbacksObj, method_setEngineCapabilities, capabilities);
checkAndClearExceptionFromCallback(env, __FUNCTION__);
}
static void acquire_wakelock_callback()
{
acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_NAME);
}
static void release_wakelock_callback()
{
release_wake_lock(WAKE_LOCK_NAME);
}
static pthread_t create_thread_callback(const char* name, void (*start)(void *), void* arg)
{
return (pthread_t)AndroidRuntime::createJavaThread(name, start, arg);
}
GpsCallbacks sGpsCallbacks = {
sizeof(GpsCallbacks),
location_callback,
status_callback,
sv_status_callback,
nmea_callback,
set_capabilities_callback,
acquire_wakelock_callback,
release_wakelock_callback,
create_thread_callback,
};
static void xtra_download_request_callback()
{
JNIEnv* env = AndroidRuntime::getJNIEnv();
env->CallVoidMethod(mCallbacksObj, method_xtraDownloadRequest);
checkAndClearExceptionFromCallback(env, __FUNCTION__);
}
GpsXtraCallbacks sGpsXtraCallbacks = {
xtra_download_request_callback,
create_thread_callback,
};
static void agps_status_callback(AGpsStatus* agps_status)
{
JNIEnv* env = AndroidRuntime::getJNIEnv();
env->CallVoidMethod(mCallbacksObj, method_reportAGpsStatus,
agps_status->type, agps_status->status);
checkAndClearExceptionFromCallback(env, __FUNCTION__);
}
AGpsCallbacks sAGpsCallbacks = {
agps_status_callback,
create_thread_callback,
};
static void gps_ni_notify_callback(GpsNiNotification *notification)
{
LOGD("gps_ni_notify_callback\n");
JNIEnv* env = AndroidRuntime::getJNIEnv();
jstring requestor_id = env->NewStringUTF(notification->requestor_id);
jstring text = env->NewStringUTF(notification->text);
jstring extras = env->NewStringUTF(notification->extras);
if (requestor_id && text && extras) {
env->CallVoidMethod(mCallbacksObj, method_reportNiNotification,
notification->notification_id, notification->ni_type,
notification->notify_flags, notification->timeout,
notification->default_response, requestor_id, text,
notification->requestor_id_encoding,
notification->text_encoding, extras);
} else {
LOGE("out of memory in gps_ni_notify_callback\n");
}
if (requestor_id)
env->DeleteLocalRef(requestor_id);
if (text)
env->DeleteLocalRef(text);
if (extras)
env->DeleteLocalRef(extras);
checkAndClearExceptionFromCallback(env, __FUNCTION__);
}
GpsNiCallbacks sGpsNiCallbacks = {
gps_ni_notify_callback,
create_thread_callback,
};
static void android_location_GpsLocationProvider_class_init_native(JNIEnv* env, jclass clazz) {
method_reportLocation = env->GetMethodID(clazz, "reportLocation", "(IDDDFFFJ)V");
method_reportStatus = env->GetMethodID(clazz, "reportStatus", "(I)V");
method_reportSvStatus = env->GetMethodID(clazz, "reportSvStatus", "()V");
method_reportAGpsStatus = env->GetMethodID(clazz, "reportAGpsStatus", "(II)V");
method_reportNmea = env->GetMethodID(clazz, "reportNmea", "(J)V");
method_setEngineCapabilities = env->GetMethodID(clazz, "setEngineCapabilities", "(I)V");
method_xtraDownloadRequest = env->GetMethodID(clazz, "xtraDownloadRequest", "()V");
method_reportNiNotification = env->GetMethodID(clazz, "reportNiNotification", "(IIIIILjava/lang/String;Ljava/lang/String;IILjava/lang/String;)V");
}
static const GpsInterface* get_gps_interface() {
int err;
hw_module_t* module;
const GpsInterface* interface = NULL;
err = hw_get_module(GPS_HARDWARE_MODULE_ID, (hw_module_t const**)&module);
if (err == 0) {
hw_device_t* device;
err = module->methods->open(module, GPS_HARDWARE_MODULE_ID, &device);
if (err == 0) {
gps_device_t* gps_device = (gps_device_t *)device;
interface = gps_device->get_gps_interface(gps_device);
}
}
return interface;
}
static jboolean android_location_GpsLocationProvider_is_supported(JNIEnv* env, jclass clazz) {
if (!sGpsInterface)
sGpsInterface = get_gps_interface();
return (sGpsInterface != NULL);
}
static jboolean android_location_GpsLocationProvider_init(JNIEnv* env, jobject obj)
{
// this must be set before calling into the HAL library
if (!mCallbacksObj)
mCallbacksObj = env->NewGlobalRef(obj);
if (!sGpsInterface)
sGpsInterface = get_gps_interface();
if (!sGpsInterface || sGpsInterface->init(&sGpsCallbacks) != 0)
return false;
if (!sAGpsInterface)
sAGpsInterface = (const AGpsInterface*)sGpsInterface->get_extension(AGPS_INTERFACE);
if (sAGpsInterface)
sAGpsInterface->init(&sAGpsCallbacks);
if (!sGpsNiInterface)
sGpsNiInterface = (const GpsNiInterface*)sGpsInterface->get_extension(GPS_NI_INTERFACE);
if (sGpsNiInterface)
sGpsNiInterface->init(&sGpsNiCallbacks);
if (!sGpsDebugInterface)
sGpsDebugInterface = (const GpsDebugInterface*)sGpsInterface->get_extension(GPS_DEBUG_INTERFACE);
return true;
}
static void android_location_GpsLocationProvider_cleanup(JNIEnv* env, jobject obj)
{
sGpsInterface->cleanup();
}
static jboolean android_location_GpsLocationProvider_set_position_mode(JNIEnv* env, jobject obj,
jint mode, jint recurrence, jint min_interval, jint preferred_accuracy, jint preferred_time)
{
return (sGpsInterface->set_position_mode(mode, recurrence, min_interval, preferred_accuracy,
preferred_time) == 0);
}
static jboolean android_location_GpsLocationProvider_start(JNIEnv* env, jobject obj)
{
return (sGpsInterface->start() == 0);
}
static jboolean android_location_GpsLocationProvider_stop(JNIEnv* env, jobject obj)
{
return (sGpsInterface->stop() == 0);
}
static void android_location_GpsLocationProvider_delete_aiding_data(JNIEnv* env, jobject obj, jint flags)
{
sGpsInterface->delete_aiding_data(flags);
}
static jint android_location_GpsLocationProvider_read_sv_status(JNIEnv* env, jobject obj,
jintArray prnArray, jfloatArray snrArray, jfloatArray elevArray, jfloatArray azumArray,
jintArray maskArray)
{
// this should only be called from within a call to reportSvStatus
jint* prns = env->GetIntArrayElements(prnArray, 0);
jfloat* snrs = env->GetFloatArrayElements(snrArray, 0);
jfloat* elev = env->GetFloatArrayElements(elevArray, 0);
jfloat* azim = env->GetFloatArrayElements(azumArray, 0);
jint* mask = env->GetIntArrayElements(maskArray, 0);
int num_svs = sGpsSvStatus.num_svs;
for (int i = 0; i < num_svs; i++) {
prns[i] = sGpsSvStatus.sv_list[i].prn;
snrs[i] = sGpsSvStatus.sv_list[i].snr;
elev[i] = sGpsSvStatus.sv_list[i].elevation;
azim[i] = sGpsSvStatus.sv_list[i].azimuth;
}
mask[0] = sGpsSvStatus.ephemeris_mask;
mask[1] = sGpsSvStatus.almanac_mask;
mask[2] = sGpsSvStatus.used_in_fix_mask;
env->ReleaseIntArrayElements(prnArray, prns, 0);
env->ReleaseFloatArrayElements(snrArray, snrs, 0);
env->ReleaseFloatArrayElements(elevArray, elev, 0);
env->ReleaseFloatArrayElements(azumArray, azim, 0);
env->ReleaseIntArrayElements(maskArray, mask, 0);
return num_svs;
}
static jint android_location_GpsLocationProvider_read_nmea(JNIEnv* env, jobject obj,
jbyteArray nmeaArray, jint buffer_size)
{
// this should only be called from within a call to reportNmea
jbyte* nmea = (jbyte *)env->GetPrimitiveArrayCritical(nmeaArray, 0);
int length = sNmeaStringLength;
if (length > buffer_size)
length = buffer_size;
memcpy(nmea, sNmeaString, length);
env->ReleasePrimitiveArrayCritical(nmeaArray, nmea, JNI_ABORT);
return length;
}
static void android_location_GpsLocationProvider_inject_time(JNIEnv* env, jobject obj,
jlong time, jlong timeReference, jint uncertainty)
{
sGpsInterface->inject_time(time, timeReference, uncertainty);
}
static void android_location_GpsLocationProvider_inject_location(JNIEnv* env, jobject obj,
jdouble latitude, jdouble longitude, jfloat accuracy)
{
sGpsInterface->inject_location(latitude, longitude, accuracy);
}
static jboolean android_location_GpsLocationProvider_supports_xtra(JNIEnv* env, jobject obj)
{
if (!sGpsXtraInterface) {
sGpsXtraInterface = (const GpsXtraInterface*)sGpsInterface->get_extension(GPS_XTRA_INTERFACE);
if (sGpsXtraInterface) {
int result = sGpsXtraInterface->init(&sGpsXtraCallbacks);
if (result) {
sGpsXtraInterface = NULL;
}
}
}
return (sGpsXtraInterface != NULL);
}
static void android_location_GpsLocationProvider_inject_xtra_data(JNIEnv* env, jobject obj,
jbyteArray data, jint length)
{
jbyte* bytes = (jbyte *)env->GetPrimitiveArrayCritical(data, 0);
sGpsXtraInterface->inject_xtra_data((char *)bytes, length);
env->ReleasePrimitiveArrayCritical(data, bytes, JNI_ABORT);
}
static void android_location_GpsLocationProvider_agps_data_conn_open(JNIEnv* env, jobject obj, jstring apn)
{
if (!sAGpsInterface) {
sAGpsInterface = (const AGpsInterface*)sGpsInterface->get_extension(AGPS_INTERFACE);
}
if (sAGpsInterface) {
if (apn == NULL) {
jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
return;
}
const char *apnStr = env->GetStringUTFChars(apn, NULL);
sAGpsInterface->data_conn_open(apnStr);
env->ReleaseStringUTFChars(apn, apnStr);
}
}
static void android_location_GpsLocationProvider_agps_data_conn_closed(JNIEnv* env, jobject obj)
{
if (!sAGpsInterface) {
sAGpsInterface = (const AGpsInterface*)sGpsInterface->get_extension(AGPS_INTERFACE);
}
if (sAGpsInterface) {
sAGpsInterface->data_conn_closed();
}
}
static void android_location_GpsLocationProvider_agps_data_conn_failed(JNIEnv* env, jobject obj)
{
if (!sAGpsInterface) {
sAGpsInterface = (const AGpsInterface*)sGpsInterface->get_extension(AGPS_INTERFACE);
}
if (sAGpsInterface) {
sAGpsInterface->data_conn_failed();
}
}
static void android_location_GpsLocationProvider_set_agps_server(JNIEnv* env, jobject obj,
jint type, jstring hostname, jint port)
{
if (!sAGpsInterface) {
sAGpsInterface = (const AGpsInterface*)sGpsInterface->get_extension(AGPS_INTERFACE);
}
if (sAGpsInterface) {
const char *c_hostname = env->GetStringUTFChars(hostname, NULL);
sAGpsInterface->set_server(type, c_hostname, port);
env->ReleaseStringUTFChars(hostname, c_hostname);
}
}
static void android_location_GpsLocationProvider_send_ni_response(JNIEnv* env, jobject obj,
jint notifId, jint response)
{
if (!sGpsNiInterface)
sGpsNiInterface = (const GpsNiInterface*)sGpsInterface->get_extension(GPS_NI_INTERFACE);
if (sGpsNiInterface)
sGpsNiInterface->respond(notifId, response);
}
static jstring android_location_GpsLocationProvider_get_internal_state(JNIEnv* env, jobject obj)
{
jstring result = NULL;
if (sGpsDebugInterface) {
const size_t maxLength = 2047;
char buffer[maxLength+1];
size_t length = sGpsDebugInterface->get_internal_state(buffer, maxLength);
if (length > maxLength) length = maxLength;
buffer[length] = 0;
result = env->NewStringUTF(buffer);
}
return result;
}
static JNINativeMethod sMethods[] = {
/* name, signature, funcPtr */
{"class_init_native", "()V", (void *)android_location_GpsLocationProvider_class_init_native},
{"native_is_supported", "()Z", (void*)android_location_GpsLocationProvider_is_supported},
{"native_init", "()Z", (void*)android_location_GpsLocationProvider_init},
{"native_cleanup", "()V", (void*)android_location_GpsLocationProvider_cleanup},
{"native_set_position_mode", "(IIIII)Z", (void*)android_location_GpsLocationProvider_set_position_mode},
{"native_start", "()Z", (void*)android_location_GpsLocationProvider_start},
{"native_stop", "()Z", (void*)android_location_GpsLocationProvider_stop},
{"native_delete_aiding_data", "(I)V", (void*)android_location_GpsLocationProvider_delete_aiding_data},
{"native_read_sv_status", "([I[F[F[F[I)I", (void*)android_location_GpsLocationProvider_read_sv_status},
{"native_read_nmea", "([BI)I", (void*)android_location_GpsLocationProvider_read_nmea},
{"native_inject_time", "(JJI)V", (void*)android_location_GpsLocationProvider_inject_time},
{"native_inject_location", "(DDF)V", (void*)android_location_GpsLocationProvider_inject_location},
{"native_supports_xtra", "()Z", (void*)android_location_GpsLocationProvider_supports_xtra},
{"native_inject_xtra_data", "([BI)V", (void*)android_location_GpsLocationProvider_inject_xtra_data},
{"native_agps_data_conn_open", "(Ljava/lang/String;)V", (void*)android_location_GpsLocationProvider_agps_data_conn_open},
{"native_agps_data_conn_closed", "()V", (void*)android_location_GpsLocationProvider_agps_data_conn_closed},
{"native_agps_data_conn_failed", "()V", (void*)android_location_GpsLocationProvider_agps_data_conn_failed},
{"native_set_agps_server", "(ILjava/lang/String;I)V", (void*)android_location_GpsLocationProvider_set_agps_server},
{"native_send_ni_response", "(II)V", (void*)android_location_GpsLocationProvider_send_ni_response},
{"native_get_internal_state", "()Ljava/lang/String;", (void*)android_location_GpsLocationProvider_get_internal_state},
};
int register_android_server_location_GpsLocationProvider(JNIEnv* env)
{
return jniRegisterNativeMethods(env, "com/android/server/location/GpsLocationProvider", sMethods, NELEM(sMethods));
}
} /* namespace android */
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