| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| #include "SDL_internal.h" |
| |
| #ifdef SDL_SENSOR_ANDROID |
| |
| /* This is the system specific header for the SDL sensor API */ |
| #include <android/sensor.h> |
| |
| #include "SDL_androidsensor.h" |
| #include "../SDL_syssensor.h" |
| #include "../SDL_sensor_c.h" |
| #include "../../thread/SDL_systhread.h" |
| |
| #ifndef LOOPER_ID_USER |
| #define LOOPER_ID_USER 3 |
| #endif |
| |
| typedef struct |
| { |
| ASensorRef asensor; |
| SDL_SensorID instance_id; |
| ASensorEventQueue *event_queue; |
| SDL_Sensor *sensor; |
| } SDL_AndroidSensor; |
| |
| typedef struct |
| { |
| SDL_AtomicInt running; |
| SDL_Thread *thread; |
| SDL_Semaphore *sem; |
| } SDL_AndroidSensorThreadContext; |
| |
| static ASensorManager *SDL_sensor_manager; |
| static ALooper *SDL_sensor_looper; |
| static SDL_AndroidSensorThreadContext SDL_sensor_thread_context; |
| static SDL_AndroidSensor *SDL_sensors SDL_GUARDED_BY(SDL_sensors_lock); |
| static int SDL_sensors_count; |
| |
| static int SDLCALL SDL_ANDROID_SensorThread(void *data) |
| { |
| SDL_AndroidSensorThreadContext *ctx = (SDL_AndroidSensorThreadContext *)data; |
| int i, events; |
| ASensorEvent event; |
| struct android_poll_source *source; |
| |
| SDL_SetThreadPriority(SDL_THREAD_PRIORITY_HIGH); |
| |
| SDL_sensor_looper = ALooper_prepare(ALOOPER_PREPARE_ALLOW_NON_CALLBACKS); |
| SDL_PostSemaphore(ctx->sem); |
| |
| while (SDL_AtomicGet(&ctx->running)) { |
| Uint64 timestamp = SDL_GetTicksNS(); |
| |
| if (ALooper_pollOnce(-1, NULL, &events, (void **)&source) == LOOPER_ID_USER) { |
| SDL_LockSensors(); |
| for (i = 0; i < SDL_sensors_count; ++i) { |
| if (!SDL_sensors[i].event_queue) { |
| continue; |
| } |
| |
| SDL_zero(event); |
| while (ASensorEventQueue_getEvents(SDL_sensors[i].event_queue, &event, 1) > 0) { |
| SDL_SendSensorUpdate(timestamp, SDL_sensors[i].sensor, timestamp, event.data, SDL_arraysize(event.data)); |
| } |
| } |
| SDL_UnlockSensors(); |
| } |
| } |
| |
| SDL_sensor_looper = NULL; |
| |
| return 0; |
| } |
| |
| static void SDL_ANDROID_StopSensorThread(SDL_AndroidSensorThreadContext *ctx) |
| { |
| SDL_AtomicSet(&ctx->running, SDL_FALSE); |
| |
| if (ctx->thread) { |
| int result; |
| |
| if (SDL_sensor_looper) { |
| ALooper_wake(SDL_sensor_looper); |
| } |
| SDL_WaitThread(ctx->thread, &result); |
| ctx->thread = NULL; |
| } |
| |
| if (ctx->sem) { |
| SDL_DestroySemaphore(ctx->sem); |
| ctx->sem = NULL; |
| } |
| } |
| |
| static int SDL_ANDROID_StartSensorThread(SDL_AndroidSensorThreadContext *ctx) |
| { |
| ctx->sem = SDL_CreateSemaphore(0); |
| if (!ctx->sem) { |
| SDL_ANDROID_StopSensorThread(ctx); |
| return -1; |
| } |
| |
| SDL_AtomicSet(&ctx->running, SDL_TRUE); |
| ctx->thread = SDL_CreateThread(SDL_ANDROID_SensorThread, "Sensors", ctx); |
| if (!ctx->thread) { |
| SDL_ANDROID_StopSensorThread(ctx); |
| return -1; |
| } |
| |
| /* Wait for the sensor thread to start */ |
| SDL_WaitSemaphore(ctx->sem); |
| |
| return 0; |
| } |
| |
| static int SDL_ANDROID_SensorInit(void) |
| { |
| int i, sensors_count; |
| ASensorList sensors; |
| |
| SDL_sensor_manager = ASensorManager_getInstance(); |
| if (!SDL_sensor_manager) { |
| return SDL_SetError("Couldn't create sensor manager"); |
| } |
| |
| /* FIXME: Is the sensor list dynamic? */ |
| sensors_count = ASensorManager_getSensorList(SDL_sensor_manager, &sensors); |
| if (sensors_count > 0) { |
| SDL_sensors = (SDL_AndroidSensor *)SDL_calloc(sensors_count, sizeof(*SDL_sensors)); |
| if (!SDL_sensors) { |
| return -1; |
| } |
| |
| for (i = 0; i < sensors_count; ++i) { |
| SDL_sensors[i].asensor = sensors[i]; |
| SDL_sensors[i].instance_id = SDL_GetNextObjectID(); |
| } |
| SDL_sensors_count = sensors_count; |
| } |
| |
| if (SDL_ANDROID_StartSensorThread(&SDL_sensor_thread_context) < 0) { |
| return -1; |
| } |
| return 0; |
| } |
| |
| static int SDL_ANDROID_SensorGetCount(void) |
| { |
| return SDL_sensors_count; |
| } |
| |
| static void SDL_ANDROID_SensorDetect(void) |
| { |
| } |
| |
| static const char *SDL_ANDROID_SensorGetDeviceName(int device_index) |
| { |
| return ASensor_getName(SDL_sensors[device_index].asensor); |
| } |
| |
| static SDL_SensorType SDL_ANDROID_SensorGetDeviceType(int device_index) |
| { |
| switch (ASensor_getType(SDL_sensors[device_index].asensor)) { |
| case 0x00000001: |
| return SDL_SENSOR_ACCEL; |
| case 0x00000004: |
| return SDL_SENSOR_GYRO; |
| default: |
| return SDL_SENSOR_UNKNOWN; |
| } |
| } |
| |
| static int SDL_ANDROID_SensorGetDeviceNonPortableType(int device_index) |
| { |
| return ASensor_getType(SDL_sensors[device_index].asensor); |
| } |
| |
| static SDL_SensorID SDL_ANDROID_SensorGetDeviceInstanceID(int device_index) |
| { |
| return SDL_sensors[device_index].instance_id; |
| } |
| |
| static int SDL_ANDROID_SensorOpen(SDL_Sensor *sensor, int device_index) |
| { |
| int delay_us, min_delay_us; |
| |
| SDL_LockSensors(); |
| { |
| SDL_sensors[device_index].sensor = sensor; |
| SDL_sensors[device_index].event_queue = ASensorManager_createEventQueue(SDL_sensor_manager, SDL_sensor_looper, LOOPER_ID_USER, NULL, NULL); |
| if (!SDL_sensors[device_index].event_queue) { |
| SDL_UnlockSensors(); |
| return SDL_SetError("Couldn't create sensor event queue"); |
| } |
| |
| if (ASensorEventQueue_enableSensor(SDL_sensors[device_index].event_queue, SDL_sensors[device_index].asensor) < 0) { |
| ASensorManager_destroyEventQueue(SDL_sensor_manager, SDL_sensors[device_index].event_queue); |
| SDL_sensors[device_index].event_queue = NULL; |
| SDL_UnlockSensors(); |
| return SDL_SetError("Couldn't enable sensor"); |
| } |
| |
| /* Use 60 Hz update rate if possible */ |
| /* FIXME: Maybe add a hint for this? */ |
| delay_us = 1000000 / 60; |
| min_delay_us = ASensor_getMinDelay(SDL_sensors[device_index].asensor); |
| if (delay_us < min_delay_us) { |
| delay_us = min_delay_us; |
| } |
| ASensorEventQueue_setEventRate(SDL_sensors[device_index].event_queue, SDL_sensors[device_index].asensor, delay_us); |
| } |
| SDL_UnlockSensors(); |
| |
| return 0; |
| } |
| |
| static void SDL_ANDROID_SensorUpdate(SDL_Sensor *sensor) |
| { |
| } |
| |
| static void SDL_ANDROID_SensorClose(SDL_Sensor *sensor) |
| { |
| int i; |
| |
| for (i = 0; i < SDL_sensors_count; ++i) { |
| if (SDL_sensors[i].sensor == sensor) { |
| SDL_LockSensors(); |
| { |
| ASensorEventQueue_disableSensor(SDL_sensors[i].event_queue, SDL_sensors[i].asensor); |
| ASensorManager_destroyEventQueue(SDL_sensor_manager, SDL_sensors[i].event_queue); |
| SDL_sensors[i].event_queue = NULL; |
| SDL_sensors[i].sensor = NULL; |
| } |
| SDL_UnlockSensors(); |
| break; |
| } |
| } |
| } |
| |
| static void SDL_ANDROID_SensorQuit(void) |
| { |
| /* All sensors are closed, but we need to unblock the sensor thread */ |
| SDL_AssertSensorsLocked(); |
| SDL_UnlockSensors(); |
| SDL_ANDROID_StopSensorThread(&SDL_sensor_thread_context); |
| SDL_LockSensors(); |
| |
| if (SDL_sensors) { |
| SDL_free(SDL_sensors); |
| SDL_sensors = NULL; |
| SDL_sensors_count = 0; |
| } |
| } |
| |
| SDL_SensorDriver SDL_ANDROID_SensorDriver = { |
| SDL_ANDROID_SensorInit, |
| SDL_ANDROID_SensorGetCount, |
| SDL_ANDROID_SensorDetect, |
| SDL_ANDROID_SensorGetDeviceName, |
| SDL_ANDROID_SensorGetDeviceType, |
| SDL_ANDROID_SensorGetDeviceNonPortableType, |
| SDL_ANDROID_SensorGetDeviceInstanceID, |
| SDL_ANDROID_SensorOpen, |
| SDL_ANDROID_SensorUpdate, |
| SDL_ANDROID_SensorClose, |
| SDL_ANDROID_SensorQuit, |
| }; |
| |
| #endif /* SDL_SENSOR_ANDROID */ |