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vdr/channels.c

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/*
* channels.c: Channel handling
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: channels.c 1.15 2003/10/03 15:12:59 kls Exp $
*/
#include "channels.h"
#include <linux/dvb/frontend.h>
#include <ctype.h>
// IMPORTANT NOTE: in the 'sscanf()' calls there is a blank after the '%d'
// format characters in order to allow any number of blanks after a numeric
// value!
// -- Channel Parameter Maps -------------------------------------------------
const tChannelParameterMap InversionValues[] = {
{ 0, INVERSION_OFF },
{ 1, INVERSION_ON },
{ 999, INVERSION_AUTO },
{ -1 }
};
const tChannelParameterMap BandwidthValues[] = {
{ 6, BANDWIDTH_6_MHZ },
{ 7, BANDWIDTH_7_MHZ },
{ 8, BANDWIDTH_8_MHZ },
{ 999, BANDWIDTH_AUTO },
{ -1 }
};
const tChannelParameterMap CoderateValues[] = {
{ 0, FEC_NONE },
{ 12, FEC_1_2 },
{ 23, FEC_2_3 },
{ 34, FEC_3_4 },
{ 45, FEC_4_5 },
{ 56, FEC_5_6 },
{ 67, FEC_6_7 },
{ 78, FEC_7_8 },
{ 89, FEC_8_9 },
{ 999, FEC_AUTO },
{ -1 }
};
const tChannelParameterMap ModulationValues[] = {
{ 0, QPSK },
{ 16, QAM_16 },
{ 32, QAM_32 },
{ 64, QAM_64 },
{ 128, QAM_128 },
{ 256, QAM_256 },
{ 999, QAM_AUTO },
{ -1 }
};
const tChannelParameterMap TransmissionValues[] = {
{ 2, TRANSMISSION_MODE_2K },
{ 8, TRANSMISSION_MODE_8K },
{ 999, TRANSMISSION_MODE_AUTO },
{ -1 }
};
const tChannelParameterMap GuardValues[] = {
{ 4, GUARD_INTERVAL_1_4 },
{ 8, GUARD_INTERVAL_1_8 },
{ 16, GUARD_INTERVAL_1_16 },
{ 32, GUARD_INTERVAL_1_32 },
{ 999, GUARD_INTERVAL_AUTO },
{ -1 }
};
const tChannelParameterMap HierarchyValues[] = {
{ 0, HIERARCHY_NONE },
{ 1, HIERARCHY_1 },
{ 2, HIERARCHY_2 },
{ 4, HIERARCHY_4 },
{ 999, HIERARCHY_AUTO },
{ -1 }
};
int UserIndex(int Value, const tChannelParameterMap *Map)
{
const tChannelParameterMap *map = Map;
while (map && map->userValue != -1) {
if (map->userValue == Value)
return map - Map;
map++;
}
return -1;
}
int DriverIndex(int Value, const tChannelParameterMap *Map)
{
const tChannelParameterMap *map = Map;
while (map && map->userValue != -1) {
if (map->driverValue == Value)
return map - Map;
map++;
}
return -1;
}
int MapToUser(int Value, const tChannelParameterMap *Map)
{
int n = DriverIndex(Value, Map);
if (n >= 0)
return Map[n].userValue;
return -1;
}
int MapToDriver(int Value, const tChannelParameterMap *Map)
{
int n = UserIndex(Value, Map);
if (n >= 0)
return Map[n].driverValue;
return -1;
}
// -- tChannelID -------------------------------------------------------------
const tChannelID tChannelID::InvalidID;
bool tChannelID::operator== (const tChannelID &arg) const
{
return source == arg.source && nid == arg.nid && tid == arg.tid && sid == arg.sid && rid == arg.rid;
}
tChannelID tChannelID::FromString(const char *s)
{
char *sourcebuf = NULL;
int nid;
int tid;
int sid;
int rid = 0;
int fields = sscanf(s, "%a[^-]-%d-%d-%d-%d", &sourcebuf, &nid, &tid, &sid, &rid);
if (fields == 4 || fields == 5) {
int source = cSource::FromString(sourcebuf);
free(sourcebuf);
if (source >= 0)
return tChannelID(source, nid, tid, sid, rid);
}
return tChannelID::InvalidID;
}
const char *tChannelID::ToString(void)
{
static char buffer[256];
snprintf(buffer, sizeof(buffer), rid ? "%s-%d-%d-%d-%d" : "%s-%d-%d-%d", cSource::ToString(source), nid, tid, sid, rid);
return buffer;
}
// -- cChannel ---------------------------------------------------------------
char *cChannel::buffer = NULL;
cChannel::cChannel(void)
{
strcpy(name, "Pro7");
frequency = 12480;
source = cSource::FromString("S19.2E");
srate = 27500;
vpid = 255;
ppid = 0;
apid1 = 256;
apid2 = 0;
dpid1 = 257;
dpid2 = 0;
tpid = 32;
ca = 0;
nid = 0;
tid = 0;
sid = 888;
rid = 0;
number = 0;
groupSep = false;
polarization = 'v';
inversion = INVERSION_AUTO;
bandwidth = BANDWIDTH_AUTO;
coderateH = FEC_AUTO;
coderateL = FEC_AUTO;
modulation = QAM_AUTO;
transmission = TRANSMISSION_MODE_AUTO;
guard = GUARD_INTERVAL_AUTO;
hierarchy = HIERARCHY_AUTO;
}
cChannel& cChannel::operator= (const cChannel &Channel)
{
memcpy(&__BeginData__, &Channel.__BeginData__, (char *)&Channel.__EndData__ - (char *)&Channel.__BeginData__);
return *this;
}
static int MHz(int frequency)
{
while (frequency > 20000)
frequency /= 1000;
return frequency;
}
tChannelID cChannel::GetChannelID(void) const
{
return tChannelID(source, nid, nid ? tid : MHz(frequency), sid, rid);
}
static int PrintParameter(char *p, char Name, int Value)
{
return Value >= 0 && Value != 999 ? sprintf(p, "%c%d", Name, Value) : 0;
}
const char *cChannel::ParametersToString(void)
{
char type = *cSource::ToString(source);
if (isdigit(type))
type = 'S';
#define ST(s) if (strchr(s, type))
static char buffer[64];
char *q = buffer;
*q = 0;
ST(" S ") q += sprintf(q, "%c", polarization);
ST("CST") q += PrintParameter(q, 'I', MapToUser(inversion, InversionValues));
ST("CST") q += PrintParameter(q, 'C', MapToUser(coderateH, CoderateValues));
ST(" T") q += PrintParameter(q, 'D', MapToUser(coderateL, CoderateValues));
ST("C T") q += PrintParameter(q, 'M', MapToUser(modulation, ModulationValues));
ST(" T") q += PrintParameter(q, 'B', MapToUser(bandwidth, BandwidthValues));
ST(" T") q += PrintParameter(q, 'T', MapToUser(transmission, TransmissionValues));
ST(" T") q += PrintParameter(q, 'G', MapToUser(guard, GuardValues));
ST(" T") q += PrintParameter(q, 'Y', MapToUser(hierarchy, HierarchyValues));
return buffer;
}
static const char *ParseParameter(const char *s, int &Value, const tChannelParameterMap *Map)
{
if (*++s) {
char *p = NULL;
errno = 0;
int n = strtol(s, &p, 10);
if (!errno && p != s) {
Value = MapToDriver(n, Map);
if (Value >= 0)
return p;
}
}
esyslog("ERROR: illegal value for parameter '%c'", *(s - 1));
return NULL;
}
bool cChannel::StringToParameters(const char *s)
{
while (s && *s) {
switch (toupper(*s)) {
case 'B': s = ParseParameter(s, bandwidth, BandwidthValues); break;
case 'C': s = ParseParameter(s, coderateH, CoderateValues); break;
case 'D': s = ParseParameter(s, coderateL, CoderateValues); break;
case 'G': s = ParseParameter(s, guard, GuardValues); break;
case 'H': polarization = *s++; break;
case 'I': s = ParseParameter(s, inversion, InversionValues); break;
// 'L' reserved for possible circular polarization
case 'M': s = ParseParameter(s, modulation, ModulationValues); break;
// 'R' reserved for possible circular polarization
case 'T': s = ParseParameter(s, transmission, TransmissionValues); break;
case 'V': polarization = *s++; break;
case 'Y': s = ParseParameter(s, hierarchy, HierarchyValues); break;
default: esyslog("ERROR: unknown parameter key '%c'", *s);
return false;
}
}
return true;
}
const char *cChannel::ToText(cChannel *Channel)
{
char buf[MaxChannelName * 2];
char *s = Channel->name;
if (strchr(s, ':')) {
s = strcpy(buf, s);
strreplace(s, ':', '|');
}
free(buffer);
if (Channel->groupSep) {
if (Channel->number)
asprintf(&buffer, ":@%d %s\n", Channel->number, s);
else
asprintf(&buffer, ":%s\n", s);
}
else {
char vpidbuf[32];
char *q = vpidbuf;
q += snprintf(q, sizeof(vpidbuf), "%d", Channel->vpid);
if (Channel->ppid)
q += snprintf(q, sizeof(vpidbuf) - (q - vpidbuf), "+%d", Channel->ppid);
*q = 0;
char apidbuf[32];
q = apidbuf;
q += snprintf(q, sizeof(apidbuf), "%d", Channel->apid1);
if (Channel->apid2)
q += snprintf(q, sizeof(apidbuf) - (q - apidbuf), ",%d", Channel->apid2);
if (Channel->dpid1 || Channel->dpid2)
q += snprintf(q, sizeof(apidbuf) - (q - apidbuf), ";%d", Channel->dpid1);
if (Channel->dpid2)
q += snprintf(q, sizeof(apidbuf) - (q - apidbuf), ",%d", Channel->dpid2);
*q = 0;
asprintf(&buffer, "%s:%d:%s:%s:%d:%s:%s:%d:%d:%d:%d:%d:%d\n", s, Channel->frequency, Channel->ParametersToString(), cSource::ToString(Channel->source), Channel->srate, vpidbuf, apidbuf, Channel->tpid, Channel->ca, Channel->sid, Channel->nid, Channel->tid, Channel->rid);
}
return buffer;
}
const char *cChannel::ToText(void)
{
return ToText(this);
}
bool cChannel::Parse(const char *s, bool AllowNonUniqueID)
{
bool ok = true;
if (*s == ':') {
groupSep = true;
if (*++s == '@' && *++s) {
char *p = NULL;
errno = 0;
int n = strtol(s, &p, 10);
if (!errno && p != s && n > 0) {
number = n;
s = p;
}
}
strn0cpy(name, skipspace(s), MaxChannelName);
}
else {
groupSep = false;
char *namebuf = NULL;
char *sourcebuf = NULL;
char *parambuf = NULL;
char *vpidbuf = NULL;
char *apidbuf = NULL;
int fields = sscanf(s, "%a[^:]:%d :%a[^:]:%a[^:] :%d :%a[^:]:%a[^:]:%d :%d :%d :%d :%d :%d ", &namebuf, &frequency, &parambuf, &sourcebuf, &srate, &vpidbuf, &apidbuf, &tpid, &ca, &sid, &nid, &tid, &rid);
if (fields >= 9) {
if (fields == 9) {
// allow reading of old format
sid = ca;
ca = tpid;
tpid = 0;
}
vpid = ppid = 0;
apid1 = apid2 = 0;
dpid1 = dpid2 = 0;
ok = false;
if (parambuf && sourcebuf && vpidbuf && apidbuf) {
ok = StringToParameters(parambuf) && (source = cSource::FromString(sourcebuf)) >= 0;
char *p = strchr(vpidbuf, '+');
if (p)
*p++ = 0;
sscanf(vpidbuf, "%d", &vpid);
if (p)
sscanf(p, "%d", &ppid);
p = strchr(apidbuf, ';');
if (p)
*p++ = 0;
sscanf(apidbuf, "%d ,%d ", &apid1, &apid2);
if (p)
sscanf(p, "%d ,%d ", &dpid1, &dpid2);
}
strn0cpy(name, namebuf, MaxChannelName);
free(parambuf);
free(sourcebuf);
free(vpidbuf);
free(apidbuf);
free(namebuf);
if (!AllowNonUniqueID && Channels.GetByChannelID(GetChannelID())) {
esyslog("ERROR: channel data not unique!");
return false;
}
}
else
return false;
}
strreplace(name, '|', ':');
return ok;
}
bool cChannel::Save(FILE *f)
{
return fprintf(f, ToText()) > 0;
}
// -- cChannels --------------------------------------------------------------
cChannels Channels;
bool cChannels::Load(const char *FileName, bool AllowComments, bool MustExist)
{
if (cConfig<cChannel>::Load(FileName, AllowComments, MustExist)) {
ReNumber();
return true;
}
return false;
}
int cChannels::GetNextGroup(int Idx)
{
cChannel *channel = Get(++Idx);
while (channel && !(channel->GroupSep() && *channel->Name()))
channel = Get(++Idx);
return channel ? Idx : -1;
}
int cChannels::GetPrevGroup(int Idx)
{
cChannel *channel = Get(--Idx);
while (channel && !(channel->GroupSep() && *channel->Name()))
channel = Get(--Idx);
return channel ? Idx : -1;
}
int cChannels::GetNextNormal(int Idx)
{
cChannel *channel = Get(++Idx);
while (channel && channel->GroupSep())
channel = Get(++Idx);
return channel ? Idx : -1;
}
void cChannels::ReNumber( void )
{
int Number = 1;
for (cChannel *channel = First(); channel; channel = Next(channel)) {
if (channel->GroupSep()) {
if (channel->Number() > Number)
Number = channel->Number();
}
else {
maxNumber = Number;
channel->SetNumber(Number++);
}
}
}
cChannel *cChannels::GetByNumber(int Number, int SkipGap)
{
cChannel *previous = NULL;
for (cChannel *channel = First(); channel; channel = Next(channel)) {
if (!channel->GroupSep()) {
if (channel->Number() == Number)
return channel;
else if (SkipGap && channel->Number() > Number)
return SkipGap > 0 ? channel : previous;
previous = channel;
}
}
return NULL;
}
cChannel *cChannels::GetByServiceID(int Source, unsigned short ServiceID)
{
for (cChannel *channel = First(); channel; channel = Next(channel)) {
if (!channel->GroupSep() && channel->Source() == Source && channel->Sid() == ServiceID)
return channel;
}
return NULL;
}
cChannel *cChannels::GetByChannelID(tChannelID ChannelID, bool TryWithoutRid)
{
for (cChannel *channel = First(); channel; channel = Next(channel)) {
if (!channel->GroupSep() && channel->GetChannelID() == ChannelID)
return channel;
}
if (TryWithoutRid) {
ChannelID.ClrRid();
for (cChannel *channel = First(); channel; channel = Next(channel)) {
if (!channel->GroupSep() && channel->GetChannelID().ClrRid() == ChannelID)
return channel;
}
}
return NULL;
}
bool cChannels::HasUniqueChannelID(cChannel *NewChannel, cChannel *OldChannel)
{
tChannelID NewChannelID = NewChannel->GetChannelID();
for (cChannel *channel = First(); channel; channel = Next(channel)) {
if (!channel->GroupSep() && channel != OldChannel && channel->GetChannelID() == NewChannelID)
return false;
}
return true;
}
bool cChannels::SwitchTo(int Number)
{
cChannel *channel = GetByNumber(Number);
return channel && cDevice::PrimaryDevice()->SwitchChannel(channel, true);
}
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