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/*
* lirc.c: LIRC remote control
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* LIRC support added by Carsten Koch <Carsten.Koch@icem.de> 2000-06-16.
*
* $Id: lirc.c 1.6 2003/04/27 11:39:47 kls Exp $
*/
#include "lirc.h"
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/un.h>
#define REPEATLIMIT 20 // ms
#define REPEATDELAY 350 // ms
#define KEYPRESSDELAY 150 // ms
cLircRemote::cLircRemote(char *DeviceName)
:cRemote("LIRC")
{
struct sockaddr_un addr;
addr.sun_family = AF_UNIX;
strcpy(addr.sun_path, DeviceName);
if ((f = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0) {
if (connect(f, (struct sockaddr *)&addr, sizeof(addr)) >= 0) {
Start();
return;
}
LOG_ERROR_STR(DeviceName);
close(f);
}
else
LOG_ERROR_STR(DeviceName);
f = -1;
}
cLircRemote::~cLircRemote()
{
Cancel();
}
bool cLircRemote::Ready(void)
{
return f >= 0;
}
void cLircRemote::Action(void)
{
dsyslog("LIRC remote control thread started (pid=%d)", getpid());
int FirstTime = 0;
int LastTime = 0;
char buf[LIRC_BUFFER_SIZE];
char LastKeyName[LIRC_KEY_BUF] = "";
bool repeat = false;
int timeout = -1;
for (; f >= 0;) {
LOCK_THREAD;
bool ready = cFile::FileReady(f, timeout);
int ret = ready ? safe_read(f, buf, sizeof(buf)) : -1;
if (ready && ret <= 0 ) {
esyslog("ERROR: lircd connection lost");
close(f);
f = -1;
break;
}
if (ready && ret > 21) {
int count;
char KeyName[LIRC_KEY_BUF];
sscanf(buf, "%*x %x %29s", &count, KeyName); // '29' in '%29s' is LIRC_KEY_BUF-1!
int Now = time_ms();
if (count == 0) {
if (strcmp(KeyName, LastKeyName) == 0 && Now - FirstTime < KEYPRESSDELAY)
continue; // skip keys coming in too fast
if (repeat)
Put(LastKeyName, false, true);
strcpy(LastKeyName, KeyName);
repeat = false;
FirstTime = Now;
timeout = -1;
}
else {
if (Now - FirstTime < REPEATDELAY)
continue; // repeat function kicks in after a short delay
repeat = true;
timeout = REPEATDELAY;
}
LastTime = Now;
Put(KeyName, repeat);
}
else if (repeat) { // the last one was a repeat, so let's generate a release
if (time_ms() - LastTime >= REPEATDELAY) {
Put(LastKeyName, false, true);
repeat = false;
*LastKeyName = 0;
timeout = -1;
}
}
}
}
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