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73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
#include "keyboard_uhid.h"
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#include "util/log.h"
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/** Downcast key processor to keyboard_uhid */
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#define DOWNCAST(KP) container_of(KP, struct sc_keyboard_uhid, key_processor)
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#define UHID_KEYBOARD_ID 1
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static void
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sc_key_processor_process_key(struct sc_key_processor *kp,
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const struct sc_key_event *event,
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uint64_t ack_to_wait) {
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(void) ack_to_wait;
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if (event->repeat) {
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// In USB HID protocol, key repeat is handled by the host (Android), so
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// just ignore key repeat here.
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return;
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}
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struct sc_keyboard_uhid *kb = DOWNCAST(kp);
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struct sc_hid_event hid_event;
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// Not all keys are supported, just ignore unsupported keys
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if (sc_hid_keyboard_event_from_key(&kb->hid, &hid_event, event)) {
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struct sc_control_msg msg;
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msg.type = SC_CONTROL_MSG_TYPE_UHID_INPUT;
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msg.uhid_input.id = UHID_KEYBOARD_ID;
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assert(hid_event.size <= SC_HID_MAX_SIZE);
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memcpy(msg.uhid_input.data, hid_event.data, hid_event.size);
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msg.uhid_input.size = hid_event.size;
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if (!sc_controller_push_msg(kb->controller, &msg)) {
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LOGE("Could not send UHID_INPUT message (key)");
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}
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}
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}
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bool
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sc_keyboard_uhid_init(struct sc_keyboard_uhid *kb,
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struct sc_controller *controller) {
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sc_hid_keyboard_init(&kb->hid);
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kb->controller = controller;
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static const struct sc_key_processor_ops ops = {
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.process_key = sc_key_processor_process_key,
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// Never forward text input via HID (all the keys are injected
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// separately)
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.process_text = NULL,
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};
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// Clipboard synchronization is requested over the same control socket, so
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// there is no need for a specific synchronization mechanism
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kb->key_processor.async_paste = false;
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kb->key_processor.ops = &ops;
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struct sc_control_msg msg;
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msg.type = SC_CONTROL_MSG_TYPE_UHID_CREATE;
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msg.uhid_create.id = UHID_KEYBOARD_ID;
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msg.uhid_create.report_desc = SC_HID_KEYBOARD_REPORT_DESC;
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msg.uhid_create.report_desc_size = SC_HID_KEYBOARD_REPORT_DESC_LEN;
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if (!sc_controller_push_msg(controller, &msg)) {
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LOGE("Could not send UHID_CREATE message (keyboard)");
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return false;
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}
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return true;
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}
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