ceckb

commit 63ae472a6386f37dc85d442c57d701816fd40a77
Author: lostd <lostd@2f30.org>
Date:   Fri, 27 Mar 2015 18:23:02 +0200

The uinput part works so far

Diffstat:
A
Makefile
 | 
17
+++++++++++++++++
A
README
 | 
9
+++++++++
A
ceckb.c
 | 
102
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
config.def.h
 | 
10
++++++++++

4 files changed, 138 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile
@@ -0,0 +1,17 @@
+LDLIBS = -lcec
+OBJS = ceckb.o
+BIN = ceckb
+
+all: $(BIN)
+
+ceckb.o: config.h
+
+clean:
+	rm -f $(OBJS) $(BIN)
+
+.PHONY: all clean
+
+.SUFFIXES: .def.h
+
+.def.h.h:
+	cp $< $@
diff --git a/README b/README
@@ -0,0 +1,9 @@
+Simple program that translates HDMI-CEC commands to Linux uinput key events.
+Inspired by libcec-daemon:
+
+https://github.com/bramp/libcec-daemon
+
+Initial sample code from:
+
+https://github.com/Pulse-Eight/libcec
+http://thiemonge.org/getting-started-with-uinput
diff --git a/ceckb.c b/ceckb.c
@@ -0,0 +1,102 @@
+#include <sys/stat.h>
+
+#include <linux/input.h>
+#include <linux/uinput.h>
+
+#include <err.h>
+#include <string.h>
+#include <stdio.h>
+#include <fcntl.h>
+
+#include <libcec/cectypes.h>
+
+#define LEN(x) (sizeof(x) / sizeof(*(x)))
+
+struct map {
+	unsigned cec;
+	unsigned code;
+};
+
+#include "config.h"
+
+void
+setupuinput(int fd)
+{
+	struct uinput_user_dev uidev;
+	unsigned int i;
+	int ret;
+
+	ret = ioctl(fd, UI_SET_EVBIT, EV_KEY);
+	if (ret == -1)
+		err(1, "key events");
+	ret = ioctl(fd, UI_SET_EVBIT, EV_SYN);
+	if (ret == -1)
+		err(1, "sync events");
+
+	/* Set available keys */
+	for (i = 0; i < LEN(bindings); i++) {
+		ret = ioctl(fd, UI_SET_KEYBIT, bindings[i].code);
+		if (ret == -1)
+			err(1, "set key 0x%x", bindings[i].code);
+	}
+
+	memset(&uidev, 0, sizeof(uidev));
+	snprintf(uidev.name, UINPUT_MAX_NAME_SIZE, "ceckb");
+	uidev.id.bustype = BUS_USB;
+	uidev.id.vendor  = 0xdead;
+	uidev.id.product = 0xbabe;
+	uidev.id.version = 1;
+
+	ret = write(fd, &uidev, sizeof(uidev));
+	if (ret == -1)
+		err(1, "write uidev");
+	ret = ioctl(fd, UI_DEV_CREATE);
+	if (ret == -1)
+		err(1, "create dev");
+}
+
+void
+cleanuinput(int fd)
+{
+	int ret;
+
+	ret = ioctl(fd, UI_DEV_DESTROY);
+	if (ret == -1)
+		err(1, "destroy dev");
+}
+
+void
+sendevent(int fd, unsigned type, unsigned code)
+{
+	struct input_event ev;
+	int ret;
+
+	memset(&ev, 0, sizeof(ev));
+	ev.type = type;
+	ev.code = code;
+	ev.value = 1;
+	ret = write(fd, &ev, sizeof(ev));
+	if (ret == -1)
+		err(1, "send event type 0x%x code 0x%x", type, code);
+}
+
+int
+main(void)
+{
+	int fd;
+
+	fd = open(upath, O_WRONLY | O_NONBLOCK);
+	if (fd == -1)
+		err(1, "open %s", upath);
+
+	setupuinput(fd);
+
+	sendevent(fd, EV_KEY, KEY_DOWN);
+	sendevent(fd, EV_SYN, SYN_REPORT);
+
+	cleanuinput(fd);
+
+	close(fd);
+
+	return 0;
+}
diff --git a/config.def.h b/config.def.h
@@ -0,0 +1,10 @@
+const char *upath = "/dev/uinput";
+
+struct map bindings[] = {
+	{ CEC_USER_CONTROL_CODE_EXIT,    KEY_Q },
+	{ CEC_USER_CONTROL_CODE_SELECT,  KEY_ENTER },
+	{ CEC_USER_CONTROL_CODE_UP,      KEY_UP },
+	{ CEC_USER_CONTROL_CODE_DOWN,    KEY_DOWN },
+	{ CEC_USER_CONTROL_CODE_LEFT,    KEY_LEFT },
+	{ CEC_USER_CONTROL_CODE_RIGHT,   KEY_RIGHT },
+};