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/*
* Copyright (C) 2015 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 FINGERPRINT_LISTEN_SERVICE_NAME "fingerprintlisten"
#define LOG_TAG "FingerprintHal"
#include <errno.h>
#include <malloc.h>
#include <string.h>
#include <cutils/log.h>
#include <hardware/hardware.h>
#include <hardware/fingerprint.h>
#include <hardware/qemud.h>
typedef enum worker_state_t {
STATE_ENROLL = 1,
STATE_SCAN = 2,
STATE_EXIT = 3
} worker_state_t;
typedef struct worker_thread_t {
pthread_t thread;
pthread_mutex_t mutex;
int request;
worker_state_t state;
int fingerid;
int finger_is_on;
} worker_thread_t;
typedef struct emu_fingerprint_hal_device_t {
fingerprint_device_t device; //inheritance
worker_thread_t listener;
pthread_mutex_t lock;
} emu_fingerprint_hal_device_t;
static void destroyListenerThread(emu_fingerprint_hal_device_t* dev)
{
pthread_join(dev->listener.thread, NULL);
pthread_mutex_destroy(&dev->listener.mutex);
}
static void listener_send_notice(emu_fingerprint_hal_device_t* dev)
{
fingerprint_msg_t message;
pthread_mutex_lock(&dev->listener.mutex);
if (dev->listener.state == STATE_ENROLL) {
message.type = FINGERPRINT_TEMPLATE_ENROLLING;
message.data.enroll.finger.fid = dev->listener.fingerid;
message.data.enroll.samples_remaining = 0;
dev->listener.state = STATE_SCAN;
} else {
message.type = FINGERPRINT_PROCESSED;
message.data.processed.finger.gid = 0;
message.data.processed.finger.fid = dev->listener.fingerid;
}
pthread_mutex_unlock(&dev->listener.mutex);
pthread_mutex_lock(&dev->lock);
dev->device.notify(message);
pthread_mutex_unlock(&dev->lock);
}
static void* listenerFunction(void* data)
{
emu_fingerprint_hal_device_t* dev = (emu_fingerprint_hal_device_t*) data;
int fd = qemud_channel_open(FINGERPRINT_LISTEN_SERVICE_NAME);
if (fd < 0) {
ALOGE("listener cannot open fingerprint listener service exit");
return NULL;
}
const char* cmd = "listen";
if (qemud_channel_send(fd, cmd, strlen(cmd)) < 0) {
ALOGE("cannot write fingerprint 'listen' to host");
return NULL;
}
char buffer[128];
int fingerid=-1;
int size;
while (1) {
//simply listen in blocking mode
if ((size = qemud_channel_recv(fd, buffer, sizeof buffer - 1)) >0) {
buffer[size] = '\0';
if (sscanf(buffer, "on:%d", &fingerid) == 1) {
dev->listener.fingerid = fingerid;
dev->listener.finger_is_on = 1;
ALOGD("got finger %d", fingerid);
listener_send_notice(dev);
ALOGD("send notice finger %d", fingerid);
} else if (strncmp("off", buffer, 3) == 0) {
dev->listener.finger_is_on = 0;
ALOGD("finger off", fingerid);
} else {
ALOGE("error: '%s'", buffer);
}
} else {
ALOGE("receive failure");
// return NULL;
}
//TODO: check for request to exit thread
}
ALOGD("listener exit");
return NULL;
}
static void createListenerThread(emu_fingerprint_hal_device_t* dev)
{
pthread_mutex_init(&dev->listener.mutex, NULL);
pthread_create(&dev->listener.thread, NULL, listenerFunction, dev);
}
static int fingerprint_close(hw_device_t *dev)
{
if (dev) {
free(dev);
destroyListenerThread(dev);
return 0;
} else {
return -1;
}
}
static void setListenerState(emu_fingerprint_hal_device_t* dev, worker_state_t state) {
pthread_mutex_lock(&dev->listener.mutex);
dev->listener.state = state;
pthread_mutex_unlock(&dev->listener.mutex);
}
static int fingerprint_enroll(struct fingerprint_device __unused *device,
uint32_t __unused timeout_sec) {
ALOGE("fingerpring_enroll");
emu_fingerprint_hal_device_t* dev = (emu_fingerprint_hal_device_t*) device;
setListenerState(dev, STATE_ENROLL);
return 0;
}
static int fingerprint_enroll_cancel(struct fingerprint_device __unused *device,
uint32_t __unused timeout_sec) {
ALOGE("fingerpring_enroll_cancel");
emu_fingerprint_hal_device_t* dev = (emu_fingerprint_hal_device_t*) device;
setListenerState(dev, STATE_SCAN);
return 0;
}
static int fingerprint_remove(struct fingerprint_device __unused *dev,
uint32_t __unused fingerprint_id) {
return FINGERPRINT_ERROR;
}
static int set_notify_callback(struct fingerprint_device *device,
fingerprint_notify_t notify) {
ALOGD("set_notify");
emu_fingerprint_hal_device_t* dev =(emu_fingerprint_hal_device_t*) device;
pthread_mutex_lock(&dev->lock);
device->notify = notify;
pthread_mutex_unlock(&dev->lock);
return 0;
}
static int fingerprint_open(const hw_module_t* module, const char __unused *id,
hw_device_t** device)
{
if (device == NULL) {
ALOGE("NULL device on open");
return -EINVAL;
} else {
ALOGE("fingerprint open\n");
}
emu_fingerprint_hal_device_t *dev = malloc(sizeof(emu_fingerprint_hal_device_t));
memset(dev, 0, sizeof(emu_fingerprint_hal_device_t));
dev->device.common.tag = HARDWARE_DEVICE_TAG;
dev->device.common.version = HARDWARE_MODULE_API_VERSION(2, 0);
dev->device.common.module = (struct hw_module_t*) module;
dev->device.common.close = fingerprint_close;
dev->device.enroll = fingerprint_enroll;
dev->device.enroll_cancel = fingerprint_enroll_cancel;
dev->device.remove = fingerprint_remove;
dev->device.set_notify = set_notify_callback;
dev->device.notify = NULL;
pthread_mutex_init(&dev->lock, NULL);
createListenerThread(dev);
*device = (hw_device_t*) dev;
return 0;
}
static struct hw_module_methods_t fingerprint_module_methods = {
.open = fingerprint_open,
};
fingerprint_module_t HAL_MODULE_INFO_SYM = {
.common = {
.tag = HARDWARE_MODULE_TAG,
.module_api_version = FINGERPRINT_MODULE_API_VERSION_1_0,
.hal_api_version = HARDWARE_HAL_API_VERSION,
.id = FINGERPRINT_HARDWARE_MODULE_ID,
.name = "Emulator Fingerprint HAL",
.author = "The Android Open Source Project",
.methods = &fingerprint_module_methods,
},
};
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