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vdr/PLUGINS/src/rcu/rcu.c

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/*
* rcu.c: A plugin for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
* $Id: rcu.c 1.2 2012/03/07 14:22:44 kls Exp $
*/
#include <getopt.h>
#include <netinet/in.h>
#include <termios.h>
#include <unistd.h>
#include <vdr/plugin.h>
#include <vdr/remote.h>
#include <vdr/status.h>
#include <vdr/thread.h>
#include <vdr/tools.h>
static const char *VERSION = "0.0.2";
static const char *DESCRIPTION = "Remote Control Unit";
#define REPEATLIMIT 150 // ms
#define REPEATDELAY 350 // ms
#define HANDSHAKETIMEOUT 20 // ms
#define DEFAULTDEVICE "/dev/ttyS1"
class cRcuRemote : public cRemote, private cThread, private cStatus {
private:
enum { modeH = 'h', modeB = 'b', modeS = 's' };
int f;
unsigned char dp, code, mode;
int number;
unsigned int data;
bool receivedCommand;
bool SendCommand(unsigned char Cmd);
int ReceiveByte(int TimeoutMs = 0);
bool SendByteHandshake(unsigned char c);
bool SendByte(unsigned char c);
bool SendData(unsigned int n);
void SetCode(unsigned char Code);
void SetMode(unsigned char Mode);
void SetNumber(int n, bool Hex = false);
void SetPoints(unsigned char Dp, bool On);
void SetString(const char *s);
bool DetectCode(unsigned char *Code);
virtual void Action(void);
virtual void ChannelSwitch(const cDevice *Device, int ChannelNumber, bool LiveView);
virtual void Recording(const cDevice *Device, const char *Name, const char *FileName, bool On);
public:
cRcuRemote(const char *DeviceName);
virtual ~cRcuRemote();
virtual bool Ready(void);
virtual bool Initialize(void);
};
cRcuRemote::cRcuRemote(const char *DeviceName)
:cRemote("RCU")
,cThread("RCU remote control")
{
dp = 0;
mode = modeB;
code = 0;
number = 0;
data = 0;
receivedCommand = false;
if ((f = open(DeviceName, O_RDWR | O_NONBLOCK)) >= 0) {
struct termios t;
if (tcgetattr(f, &t) == 0) {
cfsetspeed(&t, B9600);
cfmakeraw(&t);
if (tcsetattr(f, TCSAFLUSH, &t) == 0) {
SetNumber(8888);
const char *Setup = GetSetup();
if (Setup) {
code = *Setup;
SetCode(code);
isyslog("connecting to %s remote control using code %c", Name(), code);
}
Start();
return;
}
}
LOG_ERROR_STR(DeviceName);
close(f);
}
else
LOG_ERROR_STR(DeviceName);
f = -1;
}
cRcuRemote::~cRcuRemote()
{
Cancel();
}
bool cRcuRemote::Ready(void)
{
return f >= 0;
}
bool cRcuRemote::Initialize(void)
{
if (f >= 0) {
unsigned char Code = '0';
isyslog("trying codes for %s remote control...", Name());
for (;;) {
if (DetectCode(&Code)) {
code = Code;
break;
}
}
isyslog("established connection to %s remote control using code %c", Name(), code);
char buffer[16];
snprintf(buffer, sizeof(buffer), "%c", code);
PutSetup(buffer);
return true;
}
return false;
}
void cRcuRemote::Action(void)
{
#pragma pack(1)
union {
struct {
unsigned short address;
unsigned int command;
} data;
unsigned char raw[6];
} buffer;
#pragma pack()
time_t LastCodeRefresh = 0;
cTimeMs FirstTime;
unsigned char LastCode = 0, LastMode = 0;
uint64_t LastCommand = ~0; // 0x00 might be a valid command
unsigned int LastData = 0;
bool repeat = false;
while (Running() && f >= 0) {
if (ReceiveByte(REPEATLIMIT) == 'X') {
for (int i = 0; i < 6; i++) {
int b = ReceiveByte();
if (b >= 0) {
buffer.raw[i] = b;
if (i == 5) {
unsigned short Address = ntohs(buffer.data.address); // the PIC sends bytes in "network order"
uint64_t Command = ntohl(buffer.data.command);
if (code == 'B' && Address == 0x0000 && Command == 0x00004000)
// Well, well, if it isn't the "d-box"...
// This remote control sends the above command before and after
// each keypress - let's just drop this:
break;
Command |= uint64_t(Address) << 32;
if (Command != LastCommand) {
LastCommand = Command;
repeat = false;
FirstTime.Set();
}
else {
if (FirstTime.Elapsed() < REPEATDELAY)
break; // repeat function kicks in after a short delay
repeat = true;
}
Put(Command, repeat);
receivedCommand = true;
}
}
else
break;
}
}
else if (repeat) { // the last one was a repeat, so let's generate a release
Put(LastCommand, false, true);
repeat = false;
LastCommand = ~0;
}
else {
unsigned int d = data;
if (d != LastData) {
SendData(d);
LastData = d;
}
unsigned char c = code;
if (c != LastCode) {
SendCommand(c);
LastCode = c;
}
unsigned char m = mode;
if (m != LastMode) {
SendCommand(m);
LastMode = m;
}
LastCommand = ~0;
}
if (!repeat && code && time(NULL) - LastCodeRefresh > 60) {
SendCommand(code); // in case the PIC listens to the wrong code
LastCodeRefresh = time(NULL);
}
}
}
int cRcuRemote::ReceiveByte(int TimeoutMs)
{
// Returns the byte if one was received within a timeout, -1 otherwise
if (cFile::FileReady(f, TimeoutMs)) {
unsigned char b;
if (safe_read(f, &b, 1) == 1)
return b;
else
LOG_ERROR;
}
return -1;
}
bool cRcuRemote::SendByteHandshake(unsigned char c)
{
if (f >= 0) {
int w = write(f, &c, 1);
if (w == 1) {
for (int reply = ReceiveByte(HANDSHAKETIMEOUT); reply >= 0;) {
if (reply == c)
return true;
else if (reply == 'X') {
// skip any incoming RC code - it will come again
for (int i = 6; i--;) {
if (ReceiveByte() < 0)
return false;
}
}
else
return false;
}
}
LOG_ERROR;
}
return false;
}
bool cRcuRemote::SendByte(unsigned char c)
{
for (int retry = 5; retry--;) {
if (SendByteHandshake(c))
return true;
}
return false;
}
bool cRcuRemote::SendData(unsigned int n)
{
for (int i = 0; i < 4; i++) {
if (!SendByte(n & 0x7F))
return false;
n >>= 8;
}
return SendCommand(mode);
}
void cRcuRemote::SetCode(unsigned char Code)
{
code = Code;
}
void cRcuRemote::SetMode(unsigned char Mode)
{
mode = Mode;
}
bool cRcuRemote::SendCommand(unsigned char Cmd)
{
return SendByte(Cmd | 0x80);
}
void cRcuRemote::SetNumber(int n, bool Hex)
{
number = n;
if (!Hex) {
char buf[8];
sprintf(buf, "%4d", n & 0xFFFF);
n = 0;
for (char *d = buf; *d; d++) {
if (*d == ' ')
*d = 0xF;
n = (n << 4) | ((*d - '0') & 0x0F);
}
}
unsigned int m = 0;
for (int i = 0; i < 4; i++) {
m <<= 8;
m |= ((i & 0x03) << 5) | (n & 0x0F) | (((dp >> i) & 0x01) << 4);
n >>= 4;
}
data = m;
}
void cRcuRemote::SetString(const char *s)
{
const char *chars = mode == modeH ? "0123456789ABCDEF" : "0123456789-EHLP ";
int n = 0;
for (int i = 0; *s && i < 4; s++, i++) {
n <<= 4;
for (const char *c = chars; *c; c++) {
if (*c == *s) {
n |= c - chars;
break;
}
}
}
SetNumber(n, true);
}
void cRcuRemote::SetPoints(unsigned char Dp, bool On)
{
if (On)
dp |= Dp;
else
dp &= ~Dp;
SetNumber(number);
}
bool cRcuRemote::DetectCode(unsigned char *Code)
{
// Caller should initialize 'Code' to 0 and call DetectCode()
// until it returns true. Whenever DetectCode() returns false
// and 'Code' is not 0, the caller can use 'Code' to display
// a message like "Trying code '%c'". If false is returned and
// 'Code' is 0, all possible codes have been tried and the caller
// can either stop calling DetectCode() (and give some error
// message), or start all over again.
if (*Code < 'A' || *Code > 'D') {
*Code = 'A';
return false;
}
if (*Code <= 'D') {
SetMode(modeH);
char buf[5];
sprintf(buf, "C0D%c", *Code);
SetString(buf);
SetCode(*Code);
cCondWait::SleepMs(2 * REPEATDELAY);
if (receivedCommand) {
SetMode(modeB);
SetString("----");
return true;
}
if (*Code < 'D') {
(*Code)++;
return false;
}
}
*Code = 0;
return false;
}
void cRcuRemote::ChannelSwitch(const cDevice *Device, int ChannelNumber, bool LiveView)
{
if (ChannelNumber && LiveView)
SetNumber(cDevice::CurrentChannel());
}
void cRcuRemote::Recording(const cDevice *Device, const char *Name, const char *FileName, bool On)
{
SetPoints(1 << Device->DeviceNumber(), Device->Receiving());
}
class cPluginRcu : public cPlugin {
private:
// Add any member variables or functions you may need here.
const char *device;
public:
cPluginRcu(void);
virtual const char *Version(void) { return VERSION; }
virtual const char *Description(void) { return DESCRIPTION; }
virtual const char *CommandLineHelp(void);
virtual bool ProcessArgs(int argc, char *argv[]);
virtual bool Start(void);
};
cPluginRcu::cPluginRcu(void)
{
// Initialize any member variables here.
// DON'T DO ANYTHING ELSE THAT MAY HAVE SIDE EFFECTS, REQUIRE GLOBAL
// VDR OBJECTS TO EXIST OR PRODUCE ANY OUTPUT!
device = DEFAULTDEVICE;
}
const char *cPluginRcu::CommandLineHelp(void)
{
// Return a string that describes all known command line options.
return " -d DEV, --device=DEV set the device to use (default is " DEFAULTDEVICE ")\n";
}
bool cPluginRcu::ProcessArgs(int argc, char *argv[])
{
// Implement command line argument processing here if applicable.
static struct option long_options[] = {
{ "dev", required_argument, NULL, 'd' },
{ NULL, no_argument, NULL, 0 }
};
int c;
while ((c = getopt_long(argc, argv, "d:", long_options, NULL)) != -1) {
switch (c) {
case 'd': device = optarg;
break;
default: return false;
}
}
return true;
}
bool cPluginRcu::Start(void)
{
// Start any background activities the plugin shall perform.
new cRcuRemote(device);
return true;
}
VDRPLUGINCREATOR(cPluginRcu); // Don't touch this!
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