open_device()

bool MayaFlux::Core::HIDBackend::open_device ( uint32_t  device_id )

overridevirtual

Open a device for input.

Parameters

device_id

Device identifier from get_devices()

Returns

true if device was opened successfully

Implements MayaFlux::Core::IInputBackend.

Definition at line 232 of file HIDBackend.cpp.

{
    std::lock_guard lock(m_devices_mutex);
 
    if (m_open_devices.find(device_id) != m_open_devices.end()) {
        MF_WARN(Journal::Component::Core, Journal::Context::InputBackend,
            "HID device {} already open", device_id);
        return true;
    }
 
    auto it = m_enumerated_devices.find(device_id);
    if (it == m_enumerated_devices.end()) {
        MF_ERROR(Journal::Component::Core, Journal::Context::InputBackend,
            "HID device {} not found", device_id);
        return false;
    }
 
    hid_device* handle = hid_open_path(it->second.path.c_str());
    if (!handle) {
        MF_ERROR(Journal::Component::Core, Journal::Context::InputBackend,
            "Failed to open HID device {}: {}", device_id, it->second.name);
        return false;
    }
 
    hid_set_nonblocking(handle, 1);
 
    HIDDeviceState state;
    state.handle = handle;
    state.info = it->second;
    state.read_buffer.resize(m_config.read_buffer_size);
    state.active.store(true);
 
    auto state_ptr = std::make_shared<HIDDeviceState>();
    state_ptr->handle = handle;
    state_ptr->info = it->second;
    state_ptr->read_buffer.resize(m_config.read_buffer_size);
    state_ptr->active.store(true);
 
    m_open_devices.insert_or_assign(device_id, state_ptr);
 
    MF_INFO(Journal::Component::Core, Journal::Context::InputBackend,
        "Opened HID device {}: {}", device_id, it->second.name);
 
    return true;
}

References MayaFlux::Core::HIDDeviceState::active, MayaFlux::Journal::Core, MayaFlux::Core::HIDDeviceState::handle, MayaFlux::Core::HIDDeviceState::info, MayaFlux::Journal::InputBackend, m_config, m_devices_mutex, m_enumerated_devices, m_open_devices, MF_ERROR, MF_INFO, MF_WARN, MayaFlux::Core::HIDDeviceState::read_buffer, and MayaFlux::Core::HIDBackend::Config::read_buffer_size.

Referenced by MayaFlux::Core::InputSubsystem::initialize_hid_backend().

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