Dynamic sensor manager module - framework

Library to handle dynamic sensor connection. There are two way to use
this: as hal extension or standalone hal module.

In hal extension mode: add libdynamic_sensor_ext in dependency of hal,
instantiate DynamicSensorManager with appropriate parameters. Then
for all sensor requests, if the handle is owned by dynamic sensor
manager, forward the request.

In standalone mode, add sensor.dynamic_sensor_hal into device make
file. Usually, this also means multihal is necessary. Add
sensor.dynamic_sensor_hal into multihal configuration file.

This CL implements the dynamic sensor manager framework. Sensor daemon
will be added in follow up CL.

Test: test compile (functionality test done in a follow up CL)

Change-Id: I3b96ee135d8dbe3e199af01bed4b61637358803e

1 files changed, 167 insertions, 0 deletions

diff --git a/modules/sensors/dynamic_sensor/sensors.cpp b/modules/sensors/dynamic_sensor/sensors.cpp
new file mode 100644
index 00000000..7c203b28
--- /dev/null
+++ b/modules/sensors/dynamic_sensor/sensors.cpp
@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+
+#include "DynamicSensorManager.h"
+#include "sensors.h"
+
+#include <cutils/properties.h>
+#include <media/stagefright/foundation/ADebug.h>
+#include <utils/Log.h>
+
+#include <errno.h>
+#include <string.h>
+using namespace android;
+
+////////////////////////////////////////////////////////////////////////////////
+
+SensorContext::SensorContext(const struct hw_module_t *module) {
+    memset(&device, 0, sizeof(device));
+
+    device.common.tag = HARDWARE_DEVICE_TAG;
+    device.common.version = SENSORS_DEVICE_API_VERSION_1_3;
+    device.common.module = const_cast<hw_module_t *>(module);
+    device.common.close = CloseWrapper;
+    device.activate = ActivateWrapper;
+    device.setDelay = SetDelayWrapper;
+    device.poll = PollWrapper;
+    device.batch = BatchWrapper;
+    device.flush = FlushWrapper;
+
+    // initialize dynamic sensor manager
+    int32_t base = property_get_int32("sensor.dynamic_sensor_hal.handle_base", kDynamicHandleBase);
+    int32_t count =
+            property_get_int32("sensor.dynamic_sensor_hal.handle_count", kMaxDynamicHandleCount);
+    mDynamicSensorManager.reset(DynamicSensorManager::createInstance(base, count, nullptr));
+}
+
+int SensorContext::close() {
+    delete this;
+    return 0;
+}
+
+int SensorContext::activate(int handle, int enabled) {
+    return mDynamicSensorManager->activate(handle, enabled);
+}
+
+int SensorContext::setDelay(int handle, int64_t delayNs) {
+    return mDynamicSensorManager->setDelay(handle, delayNs);
+}
+
+int SensorContext::poll(sensors_event_t *data, int count) {
+    return mDynamicSensorManager->poll(data, count);
+}
+
+int SensorContext::batch(
+        int handle,
+        int64_t sampling_period_ns,
+        int64_t max_report_latency_ns) {
+    return mDynamicSensorManager->batch(handle, sampling_period_ns, max_report_latency_ns);
+}
+
+int SensorContext::flush(int handle) {
+    return mDynamicSensorManager->flush(handle);
+}
+
+// static
+int SensorContext::CloseWrapper(struct hw_device_t *dev) {
+    return reinterpret_cast<SensorContext *>(dev)->close();
+}
+
+// static
+int SensorContext::ActivateWrapper(
+        struct sensors_poll_device_t *dev, int handle, int enabled) {
+    return reinterpret_cast<SensorContext *>(dev)->activate(handle, enabled);
+}
+
+// static
+int SensorContext::SetDelayWrapper(
+        struct sensors_poll_device_t *dev, int handle, int64_t delayNs) {
+    return reinterpret_cast<SensorContext *>(dev)->setDelay(handle, delayNs);
+}
+
+// static
+int SensorContext::PollWrapper(
+        struct sensors_poll_device_t *dev, sensors_event_t *data, int count) {
+    return reinterpret_cast<SensorContext *>(dev)->poll(data, count);
+}
+
+// static
+int SensorContext::BatchWrapper(
+        struct sensors_poll_device_1 *dev,
+        int handle,
+        int flags,
+        int64_t sampling_period_ns,
+        int64_t max_report_latency_ns) {
+    (void) flags;
+    return reinterpret_cast<SensorContext *>(dev)->batch(
+            handle, sampling_period_ns, max_report_latency_ns);
+}
+
+// static
+int SensorContext::FlushWrapper(struct sensors_poll_device_1 *dev, int handle) {
+    return reinterpret_cast<SensorContext *>(dev)->flush(handle);
+}
+
+size_t SensorContext::getSensorList(sensor_t const **list) {
+    *list = &(mDynamicSensorManager->getDynamicMetaSensor());
+    return 1;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+static sensor_t const *sensor_list;
+
+static int open_sensors(
+        const struct hw_module_t *module,
+        const char *,
+        struct hw_device_t **dev) {
+    SensorContext *ctx = new SensorContext(module);
+    ctx->getSensorList(&sensor_list);
+    *dev = &ctx->device.common;
+    return 0;
+}
+
+static struct hw_module_methods_t sensors_module_methods = {
+    .open = open_sensors
+};
+
+static int get_sensors_list(
+        struct sensors_module_t *,
+        struct sensor_t const **list) {
+    *list = sensor_list;
+    return 1;
+}
+
+static int set_operation_mode(unsigned int mode) {
+    return (mode) ? -EINVAL : 0;
+}
+
+struct sensors_module_t HAL_MODULE_INFO_SYM = {
+    .common = {
+            .tag = HARDWARE_MODULE_TAG,
+            .version_major = 1,
+            .version_minor = 0,
+            .id = SENSORS_HARDWARE_MODULE_ID,
+            .name = "Google Dynamic Sensor Manager",
+            .author = "Google",
+            .methods = &sensors_module_methods,
+            .dso  = NULL,
+            .reserved = {0},
+    },
+    .get_sensors_list = get_sensors_list,
+    .set_operation_mode = set_operation_mode,
+};