dolphin/Source/Core/InputCommon/GCAdapter_Android.cpp

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// Copyright 2014 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
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#include "InputCommon/GCAdapter.h"
#include <algorithm>
#include <array>
#include <jni.h>
#include <mutex>
#include "Common/Event.h"
#include "Common/Flag.h"
#include "Common/Logging/Log.h"
#include "Common/Thread.h"
#include "Core/Config/MainSettings.h"
#include "Core/Core.h"
#include "Core/CoreTiming.h"
#include "Core/HW/SI/SI.h"
#include "Core/HW/SI/SI_Device.h"
#include "Core/HW/SystemTimers.h"
#include "InputCommon/GCPadStatus.h"
#include "jni/AndroidCommon/IDCache.h"
namespace GCAdapter
{
static void Setup();
static void Reset();
// Java classes
static jclass s_adapter_class;
static bool s_detected = false;
static int s_fd = 0;
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static std::array<u8, SerialInterface::MAX_SI_CHANNELS> s_controller_type = {
ControllerTypes::CONTROLLER_NONE, ControllerTypes::CONTROLLER_NONE,
ControllerTypes::CONTROLLER_NONE, ControllerTypes::CONTROLLER_NONE};
static u8 s_controller_rumble[4];
// Input handling
static std::mutex s_read_mutex;
static std::array<u8, 37> s_controller_payload;
static std::atomic<int> s_controller_payload_size{0};
// Output handling
static std::mutex s_write_mutex;
static u8 s_controller_write_payload[5];
static std::atomic<int> s_controller_write_payload_size{0};
// Adapter running thread
static std::thread s_read_adapter_thread;
static Common::Flag s_read_adapter_thread_running;
static Common::Flag s_write_adapter_thread_running;
static Common::Event s_write_happened;
// Adapter scanning thread
static std::thread s_adapter_detect_thread;
static Common::Flag s_adapter_detect_thread_running;
static u64 s_last_init = 0;
static std::optional<size_t> s_config_callback_id = std::nullopt;
static std::array<SerialInterface::SIDevices, SerialInterface::MAX_SI_CHANNELS>
s_config_si_device_type{};
static void RefreshConfig()
{
for (int i = 0; i < SerialInterface::MAX_SI_CHANNELS; ++i)
s_config_si_device_type[i] = Config::Get(Config::GetInfoForSIDevice(i));
}
static void ScanThreadFunc()
{
Common::SetCurrentThreadName("GC Adapter Scanning Thread");
NOTICE_LOG_FMT(CONTROLLERINTERFACE, "GC Adapter scanning thread started");
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JNIEnv* env = IDCache::GetEnvForThread();
jmethodID queryadapter_func = env->GetStaticMethodID(s_adapter_class, "QueryAdapter", "()Z");
while (s_adapter_detect_thread_running.IsSet())
{
if (!s_detected && UseAdapter() &&
env->CallStaticBooleanMethod(s_adapter_class, queryadapter_func))
Setup();
Common::SleepCurrentThread(1000);
}
NOTICE_LOG_FMT(CONTROLLERINTERFACE, "GC Adapter scanning thread stopped");
}
static void Write()
{
Common::SetCurrentThreadName("GC Adapter Write Thread");
NOTICE_LOG_FMT(CONTROLLERINTERFACE, "GC Adapter write thread started");
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JNIEnv* env = IDCache::GetEnvForThread();
jmethodID output_func = env->GetStaticMethodID(s_adapter_class, "Output", "([B)I");
while (s_write_adapter_thread_running.IsSet())
{
s_write_happened.Wait();
int write_size = s_controller_write_payload_size.load();
if (write_size)
{
jbyteArray jrumble_array = env->NewByteArray(5);
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jbyte* jrumble = env->GetByteArrayElements(jrumble_array, nullptr);
{
std::lock_guard<std::mutex> lk(s_write_mutex);
memcpy(jrumble, s_controller_write_payload, write_size);
}
env->ReleaseByteArrayElements(jrumble_array, jrumble, 0);
int size = env->CallStaticIntMethod(s_adapter_class, output_func, jrumble_array);
// Netplay sends invalid data which results in size = 0x00. Ignore it.
if (size != write_size && size != 0x00)
{
ERROR_LOG_FMT(CONTROLLERINTERFACE, "error writing rumble (size: {})", size);
Reset();
}
}
Common::YieldCPU();
}
NOTICE_LOG_FMT(CONTROLLERINTERFACE, "GC Adapter write thread stopped");
}
static void Read()
{
Common::SetCurrentThreadName("GC Adapter Read Thread");
NOTICE_LOG_FMT(CONTROLLERINTERFACE, "GC Adapter read thread started");
bool first_read = true;
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JNIEnv* env = IDCache::GetEnvForThread();
jfieldID payload_field = env->GetStaticFieldID(s_adapter_class, "controller_payload", "[B");
jobject payload_object = env->GetStaticObjectField(s_adapter_class, payload_field);
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auto* java_controller_payload = reinterpret_cast<jbyteArray*>(&payload_object);
// Get function pointers
jmethodID getfd_func = env->GetStaticMethodID(s_adapter_class, "GetFD", "()I");
jmethodID input_func = env->GetStaticMethodID(s_adapter_class, "Input", "()I");
jmethodID openadapter_func = env->GetStaticMethodID(s_adapter_class, "OpenAdapter", "()Z");
bool connected = env->CallStaticBooleanMethod(s_adapter_class, openadapter_func);
if (connected)
{
s_write_adapter_thread_running.Set(true);
std::thread write_adapter_thread(Write);
// Reset rumble once on initial reading
ResetRumble();
while (s_read_adapter_thread_running.IsSet())
{
int read_size = env->CallStaticIntMethod(s_adapter_class, input_func);
jbyte* java_data = env->GetByteArrayElements(*java_controller_payload, nullptr);
{
std::lock_guard<std::mutex> lk(s_read_mutex);
std::copy(java_data, java_data + s_controller_payload.size(), s_controller_payload.begin());
s_controller_payload_size.store(read_size);
}
env->ReleaseByteArrayElements(*java_controller_payload, java_data, 0);
if (first_read)
{
first_read = false;
s_fd = env->CallStaticIntMethod(s_adapter_class, getfd_func);
}
Common::YieldCPU();
}
// Terminate the write thread on leaving
if (s_write_adapter_thread_running.TestAndClear())
{
s_controller_write_payload_size.store(0);
s_write_happened.Set(); // Kick the waiting event
write_adapter_thread.join();
}
}
s_fd = 0;
s_detected = false;
NOTICE_LOG_FMT(CONTROLLERINTERFACE, "GC Adapter read thread stopped");
}
void Init()
{
if (s_fd)
return;
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if (Core::GetState() != Core::State::Uninitialized && Core::GetState() != Core::State::Starting)
{
if ((CoreTiming::GetTicks() - s_last_init) < SystemTimers::GetTicksPerSecond())
return;
s_last_init = CoreTiming::GetTicks();
}
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JNIEnv* env = IDCache::GetEnvForThread();
jclass adapter_class = env->FindClass("org/dolphinemu/dolphinemu/utils/Java_GCAdapter");
s_adapter_class = reinterpret_cast<jclass>(env->NewGlobalRef(adapter_class));
if (!s_config_callback_id)
s_config_callback_id = Config::AddConfigChangedCallback(RefreshConfig);
RefreshConfig();
if (UseAdapter())
StartScanThread();
}
static void Setup()
{
s_fd = 0;
s_detected = true;
// Make sure the thread isn't in the middle of shutting down while starting a new one
if (s_read_adapter_thread_running.TestAndClear())
s_read_adapter_thread.join();
s_read_adapter_thread_running.Set(true);
s_read_adapter_thread = std::thread(Read);
}
static void Reset()
{
if (!s_detected)
return;
if (s_read_adapter_thread_running.TestAndClear())
s_read_adapter_thread.join();
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s_controller_type.fill(ControllerTypes::CONTROLLER_NONE);
s_detected = false;
s_fd = 0;
NOTICE_LOG_FMT(CONTROLLERINTERFACE, "GC Adapter detached");
}
void Shutdown()
{
StopScanThread();
Reset();
if (s_config_callback_id)
{
Config::RemoveConfigChangedCallback(*s_config_callback_id);
s_config_callback_id = std::nullopt;
}
}
void StartScanThread()
{
if (s_adapter_detect_thread_running.IsSet())
return;
s_adapter_detect_thread_running.Set(true);
s_adapter_detect_thread = std::thread(ScanThreadFunc);
}
void StopScanThread()
{
if (s_adapter_detect_thread_running.TestAndClear())
s_adapter_detect_thread.join();
}
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GCPadStatus Input(int chan)
{
if (!UseAdapter() || !s_detected || !s_fd)
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return {};
int payload_size = 0;
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std::array<u8, 37> controller_payload_copy{};
{
std::lock_guard<std::mutex> lk(s_read_mutex);
controller_payload_copy = s_controller_payload;
payload_size = s_controller_payload_size.load();
}
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GCPadStatus pad = {};
if (payload_size != controller_payload_copy.size())
{
ERROR_LOG_FMT(CONTROLLERINTERFACE, "error reading payload (size: {}, type: {:02x})",
payload_size, controller_payload_copy[0]);
Reset();
}
else
{
bool get_origin = false;
u8 type = controller_payload_copy[1 + (9 * chan)] >> 4;
if (type != ControllerTypes::CONTROLLER_NONE &&
s_controller_type[chan] == ControllerTypes::CONTROLLER_NONE)
{
ERROR_LOG_FMT(CONTROLLERINTERFACE, "New device connected to Port {} of Type: {:02x}",
chan + 1, controller_payload_copy[1 + (9 * chan)]);
get_origin = true;
}
s_controller_type[chan] = type;
if (s_controller_type[chan] != ControllerTypes::CONTROLLER_NONE)
{
u8 b1 = controller_payload_copy[1 + (9 * chan) + 1];
u8 b2 = controller_payload_copy[1 + (9 * chan) + 2];
if (b1 & (1 << 0))
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pad.button |= PAD_BUTTON_A;
if (b1 & (1 << 1))
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pad.button |= PAD_BUTTON_B;
if (b1 & (1 << 2))
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pad.button |= PAD_BUTTON_X;
if (b1 & (1 << 3))
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pad.button |= PAD_BUTTON_Y;
if (b1 & (1 << 4))
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pad.button |= PAD_BUTTON_LEFT;
if (b1 & (1 << 5))
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pad.button |= PAD_BUTTON_RIGHT;
if (b1 & (1 << 6))
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pad.button |= PAD_BUTTON_DOWN;
if (b1 & (1 << 7))
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pad.button |= PAD_BUTTON_UP;
if (b2 & (1 << 0))
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pad.button |= PAD_BUTTON_START;
if (b2 & (1 << 1))
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pad.button |= PAD_TRIGGER_Z;
if (b2 & (1 << 2))
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pad.button |= PAD_TRIGGER_R;
if (b2 & (1 << 3))
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pad.button |= PAD_TRIGGER_L;
if (get_origin)
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pad.button |= PAD_GET_ORIGIN;
pad.stickX = controller_payload_copy[1 + (9 * chan) + 3];
pad.stickY = controller_payload_copy[1 + (9 * chan) + 4];
pad.substickX = controller_payload_copy[1 + (9 * chan) + 5];
pad.substickY = controller_payload_copy[1 + (9 * chan) + 6];
pad.triggerLeft = controller_payload_copy[1 + (9 * chan) + 7];
pad.triggerRight = controller_payload_copy[1 + (9 * chan) + 8];
}
else
{
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pad.button = PAD_ERR_STATUS;
}
}
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return pad;
}
void Output(int chan, u8 rumble_command)
{
if (!UseAdapter() || !s_detected || !s_fd)
return;
// Skip over rumble commands if it has not changed or the controller is wireless
if (rumble_command != s_controller_rumble[chan] &&
s_controller_type[chan] != ControllerTypes::CONTROLLER_WIRELESS)
{
s_controller_rumble[chan] = rumble_command;
unsigned char rumble[5] = {0x11, s_controller_rumble[0], s_controller_rumble[1],
s_controller_rumble[2], s_controller_rumble[3]};
{
std::lock_guard<std::mutex> lk(s_write_mutex);
memcpy(s_controller_write_payload, rumble, 5);
s_controller_write_payload_size.store(5);
}
s_write_happened.Set();
}
}
bool IsDetected(const char** error_message)
{
return s_detected;
}
bool DeviceConnected(int chan)
{
return s_controller_type[chan] != ControllerTypes::CONTROLLER_NONE;
}
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void ResetDeviceType(int chan)
{
s_controller_type[chan] = ControllerTypes::CONTROLLER_NONE;
}
bool UseAdapter()
{
const auto& si_devices = s_config_si_device_type;
return std::any_of(std::begin(si_devices), std::end(si_devices), [](const auto device_type) {
return device_type == SerialInterface::SIDEVICE_WIIU_ADAPTER;
});
}
void ResetRumble()
{
unsigned char rumble[5] = {0x11, 0, 0, 0, 0};
{
std::lock_guard<std::mutex> lk(s_read_mutex);
memcpy(s_controller_write_payload, rumble, 5);
s_controller_write_payload_size.store(5);
}
s_write_happened.Set();
}
void SetAdapterCallback(std::function<void(void)> func)
{
}
} // end of namespace GCAdapter