mirror of
https://github.com/VDR4Arch/vdr.git
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278 lines
7.5 KiB
C
278 lines
7.5 KiB
C
/*
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* diseqc.c: DiSEqC handling
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*
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* See the main source file 'vdr.c' for copyright information and
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* how to reach the author.
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*
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* $Id: diseqc.c 2.8 2011/09/17 10:41:00 kls Exp $
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*/
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#include "diseqc.h"
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#include <ctype.h>
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#include "sources.h"
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#include "thread.h"
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// --- cScr ------------------------------------------------------------------
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cScr::cScr(void)
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{
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channel = -1;
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userBand = 0;
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pin = -1;
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used = false;
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}
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bool cScr::Parse(const char *s)
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{
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bool result = false;
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int fields = sscanf(s, "%d %u %d", &channel, &userBand, &pin);
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if (fields == 2 || fields == 3) {
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if (channel >= 0 && channel < 8) {
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result = true;
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if (fields == 3 && (pin < 0 || pin > 255)) {
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esyslog("Error: invalid SCR pin '%d'", pin);
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result = false;
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}
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}
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else
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esyslog("Error: invalid SCR channel '%d'", channel);
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}
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return result;
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}
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// --- cScrs -----------------------------------------------------------------
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cScrs Scrs;
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cScr *cScrs::GetUnused(void)
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{
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cMutexLock MutexLock(&mutex);
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for (cScr *p = First(); p; p = Next(p)) {
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if (!p->Used()) {
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p->SetUsed(true);
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return p;
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}
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}
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return NULL;
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}
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// --- cDiseqc ---------------------------------------------------------------
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cDiseqc::cDiseqc(void)
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{
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devices = 0;
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source = 0;
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slof = 0;
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polarization = 0;
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lof = 0;
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scrBank = -1;
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commands = NULL;
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parsing = false;
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}
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cDiseqc::~cDiseqc()
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{
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free(commands);
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}
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bool cDiseqc::Parse(const char *s)
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{
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bool result = false;
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char *sourcebuf = NULL;
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if (*s && s[strlen(s) - 1] == ':') {
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const char *p = s;
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while (*p && *p != ':') {
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char *t = NULL;
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int d = strtol(p, &t, 10);
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p = t;
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if (0 < d && d < 32)
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devices |= (1 << d - 1);
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else {
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esyslog("ERROR: invalid device number %d in '%s'", d, s);
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return false;
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}
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}
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return true;
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}
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int fields = sscanf(s, "%a[^ ] %d %c %d %a[^\n]", &sourcebuf, &slof, &polarization, &lof, &commands);
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if (fields == 4)
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commands = NULL; //XXX Apparently sscanf() doesn't work correctly if the last %a argument results in an empty string
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if (4 <= fields && fields <= 5) {
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source = cSource::FromString(sourcebuf);
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if (Sources.Get(source)) {
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polarization = char(toupper(polarization));
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if (polarization == 'V' || polarization == 'H' || polarization == 'L' || polarization == 'R') {
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parsing = true;
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const char *CurrentAction = NULL;
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while (Execute(&CurrentAction, NULL, NULL, NULL, NULL) != daNone)
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;
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parsing = false;
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result = !commands || !*CurrentAction;
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}
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else
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esyslog("ERROR: unknown polarization '%c'", polarization);
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}
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else
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esyslog("ERROR: unknown source '%s'", sourcebuf);
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}
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free(sourcebuf);
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return result;
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}
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uint cDiseqc::SetScrFrequency(uint SatFrequency, const cScr *Scr, uint8_t *Codes) const
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{
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uint t = SatFrequency == 0 ? 0 : (SatFrequency + Scr->UserBand() + 2) / 4 - 350; // '+ 2' together with '/ 4' results in rounding!
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if (t < 1024 && Scr->Channel() >= 0 && Scr->Channel() < 8) {
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Codes[3] = t >> 8 | (t == 0 ? 0 : scrBank << 2) | Scr->Channel() << 5;
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Codes[4] = t;
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if (t)
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return (t + 350) * 4 - SatFrequency;
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}
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return 0;
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}
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int cDiseqc::SetScrPin(const cScr *Scr, uint8_t *Codes) const
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{
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if (Scr->Pin() >= 0 && Scr->Pin() <= 255) {
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Codes[2] = 0x5C;
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Codes[5] = Scr->Pin();
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return 6;
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}
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else {
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Codes[2] = 0x5A;
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return 5;
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}
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}
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const char *cDiseqc::Wait(const char *s) const
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{
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char *p = NULL;
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errno = 0;
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int n = strtol(s, &p, 10);
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if (!errno && p != s && n >= 0) {
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if (!parsing)
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cCondWait::SleepMs(n);
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return p;
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}
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esyslog("ERROR: invalid value for wait time in '%s'", s - 1);
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return NULL;
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}
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const char *cDiseqc::GetScrBank(const char *s) const
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{
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char *p = NULL;
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errno = 0;
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int n = strtol(s, &p, 10);
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if (!errno && p != s && n >= 0 && n < 8) {
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if (parsing) {
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if (scrBank < 0)
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scrBank = n;
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else
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esyslog("ERROR: more than one scr bank in '%s'", s - 1);
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}
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return p;
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}
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esyslog("ERROR: more than one scr bank in '%s'", s - 1);
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return NULL;
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}
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const char *cDiseqc::GetCodes(const char *s, uchar *Codes, uint8_t *MaxCodes) const
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{
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const char *e = strchr(s, ']');
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if (e) {
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int NumCodes = 0;
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const char *t = s;
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while (t < e) {
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if (NumCodes < MaxDiseqcCodes) {
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errno = 0;
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char *p;
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int n = strtol(t, &p, 16);
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if (!errno && p != t && 0 <= n && n <= 255) {
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if (Codes) {
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if (NumCodes < *MaxCodes)
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Codes[NumCodes++] = uchar(n);
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else {
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esyslog("ERROR: too many codes in code sequence '%s'", s - 1);
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return NULL;
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}
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}
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t = skipspace(p);
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}
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else {
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esyslog("ERROR: invalid code at '%s'", t);
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return NULL;
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}
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}
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else {
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esyslog("ERROR: too many codes in code sequence '%s'", s - 1);
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return NULL;
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}
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}
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if (MaxCodes)
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*MaxCodes = NumCodes;
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return e + 1;
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}
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else
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esyslog("ERROR: missing closing ']' in code sequence '%s'", s - 1);
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return NULL;
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}
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cDiseqc::eDiseqcActions cDiseqc::Execute(const char **CurrentAction, uchar *Codes, uint8_t *MaxCodes, const cScr *Scr, uint *Frequency) const
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{
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if (!*CurrentAction)
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*CurrentAction = commands;
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while (*CurrentAction && **CurrentAction) {
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switch (*(*CurrentAction)++) {
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case ' ': break;
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case 't': return daToneOff;
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case 'T': return daToneOn;
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case 'v': return daVoltage13;
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case 'V': return daVoltage18;
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case 'A': return daMiniA;
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case 'B': return daMiniB;
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case 'W': *CurrentAction = Wait(*CurrentAction); break;
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case 'S': *CurrentAction = GetScrBank(*CurrentAction); break;
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case '[': *CurrentAction = GetCodes(*CurrentAction, Codes, MaxCodes);
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if (*CurrentAction) {
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if (Scr && Frequency) {
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*Frequency = SetScrFrequency(*Frequency, Scr, Codes);
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*MaxCodes = SetScrPin(Scr, Codes);
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}
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return daCodes;
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}
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break;
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default: return daNone;
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}
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}
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return daNone;
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}
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// --- cDiseqcs --------------------------------------------------------------
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cDiseqcs Diseqcs;
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const cDiseqc *cDiseqcs::Get(int Device, int Source, int Frequency, char Polarization, const cScr **Scr) const
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{
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int Devices = 0;
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for (const cDiseqc *p = First(); p; p = Next(p)) {
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if (p->Devices()) {
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Devices = p->Devices();
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continue;
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}
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if (Devices && !(Devices & (1 << Device - 1)))
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continue;
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if (p->Source() == Source && p->Slof() > Frequency && p->Polarization() == toupper(Polarization)) {
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if (p->IsScr() && Scr && !*Scr) {
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*Scr = Scrs.GetUnused();
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if (*Scr)
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dsyslog("SCR %d assigned to device %d", (*Scr)->Index(), Device);
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else
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esyslog("ERROR: no free SCR entry available for device %d", Device);
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}
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return p;
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}
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}
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return NULL;
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}
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