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267 lines (232 loc) · 6.55 KB
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// dcled-hidapi - userland driver for the Dream Cheeky LED Message Board
// Copyright 2018 Jahn Fuchs <github.jahnf@wolke7.net>
// Distributed under the MIT License. See accompanying LICENSE file.
#include "device.h"
#include "animations.h"
#include "output.h"
#include "screen.h"
#include <atomic>
#include <chrono>
#include <codecvt>
#include <iostream>
#include <locale>
#include <sstream>
#include <thread>
#include <utility>
#ifdef __linux__
#include <unistd.h>
#elif defined _WIN32
#include <windows.h>
#include <io.h>
#include <stdio.h>
#define isatty _isatty
#define fileno _fileno
#endif
#include "moodycamel/concurrentqueue.h"
#ifndef WITHOUT_HIDAPI
#include <hidapi/hidapi.h>
HidApi::HidApi() : res(hid_init()) {}
HidApi::~HidApi() { hid_exit(); }
#else
HidApi::HidApi() : res(1) {}
HidApi::~HidApi() {}
namespace {
using hid_device = void;
void* hid_open(...) { return nullptr; }
void* hid_open_path(...) { return nullptr; }
void hid_close(...) {}
}
#endif
namespace {
bool stdoutIsTty() {
return isatty(fileno(stdout));
}
// Screen with modified flag for the internal implementation
struct InternalScreen : public dcled::Screen
{
static constexpr size_t LEDMSGSIZE = sizeof(LedMsg);
InternalScreen() = default;
~InternalScreen() = default;
inline const auto& msgs() const { return msgs_; }
};
std::atomic<bool> threadStop(false);
} // end anonymous namespace
constexpr char dcled::Device::EMULATED_DEV_PATH[];
constexpr char dcled::Device::INVALID_DEV_PATH[];
void dcled::Device::stopThreads(int /*s*/)
{
::threadStop = true;
}
struct dcled::Device::Impl
{
Impl(bool toStdout = false)
: handle(hid_open(VENDOR_ID, PRODUCT_ID, NULL)),
to_stdout(toStdout), stdout_is_tty(stdoutIsTty())
{
std::stringstream ss;
ss << "VENDOR_ID: " << std::hex << VENDOR_ID << ", PRODUCT_ID: " << PRODUCT_ID;
path = ss.str();
if (this->to_stdout && stdout_is_tty) {
for (int i = 0; i < Screen::HEIGHT; ++i) std::cout << std::endl;
}
}
Impl(std::string usb_path, bool toStdout = false)
: path(std::move(usb_path)), to_stdout(toStdout), stdout_is_tty(stdoutIsTty())
{
if (path.compare( INVALID_DEV_PATH ) == 0) {
handle = nullptr;
}
else if (path.compare( EMULATED_DEV_PATH ) != 0) {
handle = hid_open_path(usb_path.c_str());
}
else {
this->to_stdout = emulated_only = true;
}
if (this->to_stdout && stdout_is_tty) {
for (int i = 0; i < Screen::HEIGHT; ++i) std::cout << std::endl;
}
}
~Impl()
{
// TODO check if an animation thread is running -> stop, join
if (handle)
hid_close(handle);
}
uint32_t sleepDuration(uint32_t& ms) const
{
if (ms < 250) { auto res = ms; ms = 0; return res; }
if (ms < 350) { ms -= 175; return 175; }
ms -= 250; return 250;
}
void animationThread()
{
//debug() << "started animation thread " << std::this_thread::get_id();
std::unique_ptr<Animation> a;
uint32_t animDurationMs = 0;
while (!::threadStop && animations.try_dequeue(a))
{
while (!::threadStop && (animDurationMs = a->step(screen)))
{
auto timeUntil = std::chrono::high_resolution_clock::now();
while (!::threadStop && ( animDurationMs > 0 ))
{
screenToDevice();
timeUntil += std::chrono::milliseconds(sleepDuration(animDurationMs));
std::this_thread::sleep_until(timeUntil);
}
}
}
// debug() << "stopping animation thread " << std::this_thread::get_id();
}
void terminalPosReset() {
if (stdout_is_tty) {
#ifndef _WIN32
std::cout << "\x1b[" << char(Screen::HEIGHT + 0x30) << "A";
#else
HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
CONSOLE_SCREEN_BUFFER_INFO screenBufferInfo;
if (GetConsoleScreenBufferInfo(hConsole, &screenBufferInfo)) {
COORD coord;
coord.X = 0;
coord.Y = screenBufferInfo.dwCursorPosition.Y - Screen::HEIGHT;
SetConsoleCursorPosition(hConsole, coord);
}
#endif
}
else
std::cout << "\n";
}
void screenToDevice()
{
#ifndef WITHOUT_HIDAPI
if (handle) {
for (const auto& msg : screen.msgs() ) {
hid_send_feature_report(handle, reinterpret_cast<const uint8_t*>(&msg), screen.LEDMSGSIZE );
}
}
#endif
if (to_stdout) {
terminalPosReset();
screen.print(stdout_is_tty);
}
}
hid_device* handle = nullptr;
std::string path = "/dev/null";
InternalScreen screen;
moodycamel::ConcurrentQueue<std::unique_ptr<dcled::Animation>> animations;
bool to_stdout = false;
bool stdout_is_tty = false;
bool emulated_only = false;
};
dcled::Device::Device(bool toStdout)
: p_(new Impl(toStdout))
{
}
dcled::Device::Device(const char* device_path, bool toStdout)
: p_(new Impl(device_path, toStdout))
{
}
dcled::Device::Device(std::string device_path, bool toStdout)
: p_(new Impl(std::move(device_path), toStdout))
{
}
dcled::Device::Device(Device&& other)
: p_(std::move(other.p_))
{
}
dcled::Device::~Device()
{
}
const std::list<dcled::DeviceInfo> dcled::Device::list()
{
std::list<DeviceInfo> device_list;
#ifndef WITHOUT_HIDAPI
if (HidApi::init())
{
hid_device_info* devs = hid_enumerate(0x0, 0x0);
for (hid_device_info* cur_dev = devs; cur_dev; cur_dev = cur_dev->next) {
if (cur_dev->vendor_id == VENDOR_ID && cur_dev->product_id == PRODUCT_ID) {
if (!cur_dev->manufacturer_string || !cur_dev->product_string || !cur_dev->serial_number) {
error() << "Could not open device at '" << cur_dev->path
<< "'." << "Check your udev rules.";
continue;
}
std::wstring_convert<std::codecvt_utf8<wchar_t>,wchar_t> cv;
device_list.push_back( DeviceInfo{ VENDOR_ID, PRODUCT_ID, cur_dev->path,
cv.to_bytes(cur_dev->serial_number),
cv.to_bytes(cur_dev->manufacturer_string),
cv.to_bytes(cur_dev->product_string) });
}
}
hid_free_enumeration(devs);
}
#endif
return device_list;
}
dcled::Screen& dcled::Device::screen()
{
return p_->screen;
}
bool dcled::Device::isOpen() const
{
if( p_->emulated_only )
return true;
return p_->handle;
}
const std::string& dcled::Device::path() const
{
return p_->path;
}
void dcled::Device::update()
{
p_->screenToDevice();
}
void dcled::Device::enqueue_ptr(std::unique_ptr<Animation> a)
{
if(a) p_->animations.enqueue(std::move(a));
}
void dcled::Device::playAll()
{
auto t = std::thread(&Impl::animationThread, p_.get());
t.join();
}