mirror of
https://github.com/VDR4Arch/vdr.git
synced 2023-10-10 13:36:52 +02:00
500 lines
14 KiB
C
500 lines
14 KiB
C
/*
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* channels.c: Channel 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: channels.c 1.16 2003/10/17 15:42:40 kls Exp $
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*/
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#include "channels.h"
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#include <linux/dvb/frontend.h>
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#include <ctype.h>
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// IMPORTANT NOTE: in the 'sscanf()' calls there is a blank after the '%d'
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// format characters in order to allow any number of blanks after a numeric
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// value!
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// -- Channel Parameter Maps -------------------------------------------------
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const tChannelParameterMap InversionValues[] = {
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{ 0, INVERSION_OFF },
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{ 1, INVERSION_ON },
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{ 999, INVERSION_AUTO },
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{ -1 }
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};
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const tChannelParameterMap BandwidthValues[] = {
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{ 6, BANDWIDTH_6_MHZ },
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{ 7, BANDWIDTH_7_MHZ },
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{ 8, BANDWIDTH_8_MHZ },
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{ 999, BANDWIDTH_AUTO },
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{ -1 }
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};
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const tChannelParameterMap CoderateValues[] = {
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{ 0, FEC_NONE },
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{ 12, FEC_1_2 },
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{ 23, FEC_2_3 },
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{ 34, FEC_3_4 },
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{ 45, FEC_4_5 },
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{ 56, FEC_5_6 },
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{ 67, FEC_6_7 },
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{ 78, FEC_7_8 },
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{ 89, FEC_8_9 },
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{ 999, FEC_AUTO },
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{ -1 }
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};
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const tChannelParameterMap ModulationValues[] = {
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{ 0, QPSK },
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{ 16, QAM_16 },
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{ 32, QAM_32 },
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{ 64, QAM_64 },
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{ 128, QAM_128 },
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{ 256, QAM_256 },
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{ 999, QAM_AUTO },
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{ -1 }
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};
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const tChannelParameterMap TransmissionValues[] = {
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{ 2, TRANSMISSION_MODE_2K },
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{ 8, TRANSMISSION_MODE_8K },
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{ 999, TRANSMISSION_MODE_AUTO },
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{ -1 }
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};
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const tChannelParameterMap GuardValues[] = {
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{ 4, GUARD_INTERVAL_1_4 },
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{ 8, GUARD_INTERVAL_1_8 },
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{ 16, GUARD_INTERVAL_1_16 },
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{ 32, GUARD_INTERVAL_1_32 },
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{ 999, GUARD_INTERVAL_AUTO },
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{ -1 }
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};
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const tChannelParameterMap HierarchyValues[] = {
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{ 0, HIERARCHY_NONE },
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{ 1, HIERARCHY_1 },
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{ 2, HIERARCHY_2 },
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{ 4, HIERARCHY_4 },
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{ 999, HIERARCHY_AUTO },
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{ -1 }
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};
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int UserIndex(int Value, const tChannelParameterMap *Map)
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{
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const tChannelParameterMap *map = Map;
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while (map && map->userValue != -1) {
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if (map->userValue == Value)
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return map - Map;
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map++;
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}
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return -1;
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}
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int DriverIndex(int Value, const tChannelParameterMap *Map)
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{
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const tChannelParameterMap *map = Map;
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while (map && map->userValue != -1) {
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if (map->driverValue == Value)
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return map - Map;
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map++;
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}
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return -1;
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}
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int MapToUser(int Value, const tChannelParameterMap *Map)
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{
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int n = DriverIndex(Value, Map);
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if (n >= 0)
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return Map[n].userValue;
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return -1;
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}
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int MapToDriver(int Value, const tChannelParameterMap *Map)
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{
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int n = UserIndex(Value, Map);
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if (n >= 0)
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return Map[n].driverValue;
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return -1;
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}
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// -- tChannelID -------------------------------------------------------------
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const tChannelID tChannelID::InvalidID;
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bool tChannelID::operator== (const tChannelID &arg) const
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{
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return source == arg.source && nid == arg.nid && tid == arg.tid && sid == arg.sid && rid == arg.rid;
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}
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tChannelID tChannelID::FromString(const char *s)
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{
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char *sourcebuf = NULL;
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int nid;
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int tid;
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int sid;
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int rid = 0;
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int fields = sscanf(s, "%a[^-]-%d-%d-%d-%d", &sourcebuf, &nid, &tid, &sid, &rid);
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if (fields == 4 || fields == 5) {
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int source = cSource::FromString(sourcebuf);
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free(sourcebuf);
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if (source >= 0)
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return tChannelID(source, nid, tid, sid, rid);
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}
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return tChannelID::InvalidID;
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}
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const char *tChannelID::ToString(void)
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{
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static char buffer[256];
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snprintf(buffer, sizeof(buffer), rid ? "%s-%d-%d-%d-%d" : "%s-%d-%d-%d", cSource::ToString(source), nid, tid, sid, rid);
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return buffer;
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}
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// -- cChannel ---------------------------------------------------------------
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char *cChannel::buffer = NULL;
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cChannel::cChannel(void)
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{
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strcpy(name, "Pro7");
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frequency = 12480;
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source = cSource::FromString("S19.2E");
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srate = 27500;
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vpid = 255;
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ppid = 0;
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apid1 = 256;
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apid2 = 0;
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dpid1 = 257;
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dpid2 = 0;
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tpid = 32;
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ca = 0;
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nid = 0;
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tid = 0;
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sid = 888;
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rid = 0;
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number = 0;
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groupSep = false;
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polarization = 'v';
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inversion = INVERSION_AUTO;
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bandwidth = BANDWIDTH_AUTO;
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coderateH = FEC_AUTO;
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coderateL = FEC_AUTO;
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modulation = QAM_AUTO;
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transmission = TRANSMISSION_MODE_AUTO;
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guard = GUARD_INTERVAL_AUTO;
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hierarchy = HIERARCHY_AUTO;
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}
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cChannel& cChannel::operator= (const cChannel &Channel)
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{
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memcpy(&__BeginData__, &Channel.__BeginData__, (char *)&Channel.__EndData__ - (char *)&Channel.__BeginData__);
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return *this;
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}
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static int MHz(int frequency)
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{
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while (frequency > 20000)
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frequency /= 1000;
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return frequency;
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}
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tChannelID cChannel::GetChannelID(void) const
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{
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return tChannelID(source, nid, nid ? tid : MHz(frequency), sid, rid);
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}
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static int PrintParameter(char *p, char Name, int Value)
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{
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return Value >= 0 && Value != 999 ? sprintf(p, "%c%d", Name, Value) : 0;
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}
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const char *cChannel::ParametersToString(void)
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{
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char type = *cSource::ToString(source);
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if (isdigit(type))
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type = 'S';
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#define ST(s) if (strchr(s, type))
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static char buffer[64];
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char *q = buffer;
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*q = 0;
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ST(" S ") q += sprintf(q, "%c", polarization);
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ST("CST") q += PrintParameter(q, 'I', MapToUser(inversion, InversionValues));
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ST("CST") q += PrintParameter(q, 'C', MapToUser(coderateH, CoderateValues));
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ST(" T") q += PrintParameter(q, 'D', MapToUser(coderateL, CoderateValues));
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ST("C T") q += PrintParameter(q, 'M', MapToUser(modulation, ModulationValues));
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ST(" T") q += PrintParameter(q, 'B', MapToUser(bandwidth, BandwidthValues));
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ST(" T") q += PrintParameter(q, 'T', MapToUser(transmission, TransmissionValues));
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ST(" T") q += PrintParameter(q, 'G', MapToUser(guard, GuardValues));
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ST(" T") q += PrintParameter(q, 'Y', MapToUser(hierarchy, HierarchyValues));
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return buffer;
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}
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static const char *ParseParameter(const char *s, int &Value, const tChannelParameterMap *Map)
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{
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if (*++s) {
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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) {
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Value = MapToDriver(n, Map);
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if (Value >= 0)
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return p;
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}
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}
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esyslog("ERROR: illegal value for parameter '%c'", *(s - 1));
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return NULL;
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}
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bool cChannel::StringToParameters(const char *s)
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{
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while (s && *s) {
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switch (toupper(*s)) {
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case 'B': s = ParseParameter(s, bandwidth, BandwidthValues); break;
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case 'C': s = ParseParameter(s, coderateH, CoderateValues); break;
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case 'D': s = ParseParameter(s, coderateL, CoderateValues); break;
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case 'G': s = ParseParameter(s, guard, GuardValues); break;
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case 'H': polarization = *s++; break;
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case 'I': s = ParseParameter(s, inversion, InversionValues); break;
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// 'L' reserved for possible circular polarization
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case 'M': s = ParseParameter(s, modulation, ModulationValues); break;
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// 'R' reserved for possible circular polarization
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case 'T': s = ParseParameter(s, transmission, TransmissionValues); break;
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case 'V': polarization = *s++; break;
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case 'Y': s = ParseParameter(s, hierarchy, HierarchyValues); break;
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default: esyslog("ERROR: unknown parameter key '%c'", *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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const char *cChannel::ToText(cChannel *Channel)
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{
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char buf[MaxChannelName * 2];
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char *s = Channel->name;
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if (strchr(s, ':')) {
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s = strcpy(buf, s);
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strreplace(s, ':', '|');
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}
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free(buffer);
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if (Channel->groupSep) {
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if (Channel->number)
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asprintf(&buffer, ":@%d %s\n", Channel->number, s);
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else
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asprintf(&buffer, ":%s\n", s);
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}
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else {
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char vpidbuf[32];
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char *q = vpidbuf;
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q += snprintf(q, sizeof(vpidbuf), "%d", Channel->vpid);
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if (Channel->ppid)
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q += snprintf(q, sizeof(vpidbuf) - (q - vpidbuf), "+%d", Channel->ppid);
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*q = 0;
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char apidbuf[32];
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q = apidbuf;
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q += snprintf(q, sizeof(apidbuf), "%d", Channel->apid1);
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if (Channel->apid2)
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q += snprintf(q, sizeof(apidbuf) - (q - apidbuf), ",%d", Channel->apid2);
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if (Channel->dpid1 || Channel->dpid2)
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q += snprintf(q, sizeof(apidbuf) - (q - apidbuf), ";%d", Channel->dpid1);
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if (Channel->dpid2)
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q += snprintf(q, sizeof(apidbuf) - (q - apidbuf), ",%d", Channel->dpid2);
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*q = 0;
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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);
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}
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return buffer;
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}
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const char *cChannel::ToText(void)
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{
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return ToText(this);
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}
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bool cChannel::Parse(const char *s, bool AllowNonUniqueID)
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{
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bool ok = true;
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if (*s == ':') {
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groupSep = true;
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if (*++s == '@' && *++s) {
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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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number = n;
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s = p;
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}
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}
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strn0cpy(name, skipspace(s), MaxChannelName);
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}
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else {
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groupSep = false;
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char *namebuf = NULL;
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char *sourcebuf = NULL;
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char *parambuf = NULL;
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char *vpidbuf = NULL;
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char *apidbuf = NULL;
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int fields = sscanf(s, "%a[^:]:%d :%a[^:]:%a[^:] :%d :%a[^:]:%a[^:]:%d :%d :%d :%d :%d :%d ", &namebuf, &frequency, ¶mbuf, &sourcebuf, &srate, &vpidbuf, &apidbuf, &tpid, &ca, &sid, &nid, &tid, &rid);
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if (fields >= 9) {
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if (fields == 9) {
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// allow reading of old format
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sid = ca;
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ca = tpid;
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tpid = 0;
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}
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vpid = ppid = 0;
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apid1 = apid2 = 0;
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dpid1 = dpid2 = 0;
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ok = false;
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if (parambuf && sourcebuf && vpidbuf && apidbuf) {
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ok = StringToParameters(parambuf) && (source = cSource::FromString(sourcebuf)) >= 0;
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char *p = strchr(vpidbuf, '+');
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if (p)
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*p++ = 0;
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sscanf(vpidbuf, "%d", &vpid);
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if (p)
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sscanf(p, "%d", &ppid);
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p = strchr(apidbuf, ';');
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if (p)
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*p++ = 0;
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sscanf(apidbuf, "%d ,%d ", &apid1, &apid2);
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if (p)
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sscanf(p, "%d ,%d ", &dpid1, &dpid2);
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}
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strn0cpy(name, namebuf, MaxChannelName);
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free(parambuf);
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free(sourcebuf);
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free(vpidbuf);
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free(apidbuf);
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free(namebuf);
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if (!GetChannelID().Valid()) {
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esyslog("ERROR: channel data results in invalid ID!");
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return false;
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}
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if (!AllowNonUniqueID && Channels.GetByChannelID(GetChannelID())) {
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esyslog("ERROR: channel data not unique!");
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return false;
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}
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}
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else
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return false;
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}
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strreplace(name, '|', ':');
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return ok;
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}
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bool cChannel::Save(FILE *f)
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{
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return fprintf(f, ToText()) > 0;
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}
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// -- cChannels --------------------------------------------------------------
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cChannels Channels;
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bool cChannels::Load(const char *FileName, bool AllowComments, bool MustExist)
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{
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if (cConfig<cChannel>::Load(FileName, AllowComments, MustExist)) {
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ReNumber();
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return true;
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}
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return false;
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}
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int cChannels::GetNextGroup(int Idx)
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{
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cChannel *channel = Get(++Idx);
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while (channel && !(channel->GroupSep() && *channel->Name()))
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channel = Get(++Idx);
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return channel ? Idx : -1;
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}
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int cChannels::GetPrevGroup(int Idx)
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{
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cChannel *channel = Get(--Idx);
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while (channel && !(channel->GroupSep() && *channel->Name()))
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channel = Get(--Idx);
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return channel ? Idx : -1;
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}
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int cChannels::GetNextNormal(int Idx)
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{
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cChannel *channel = Get(++Idx);
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while (channel && channel->GroupSep())
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channel = Get(++Idx);
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return channel ? Idx : -1;
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}
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void cChannels::ReNumber( void )
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{
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int Number = 1;
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for (cChannel *channel = First(); channel; channel = Next(channel)) {
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if (channel->GroupSep()) {
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if (channel->Number() > Number)
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Number = channel->Number();
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}
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else {
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maxNumber = Number;
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channel->SetNumber(Number++);
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}
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}
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}
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cChannel *cChannels::GetByNumber(int Number, int SkipGap)
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{
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cChannel *previous = NULL;
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for (cChannel *channel = First(); channel; channel = Next(channel)) {
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if (!channel->GroupSep()) {
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if (channel->Number() == Number)
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return channel;
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else if (SkipGap && channel->Number() > Number)
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return SkipGap > 0 ? channel : previous;
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previous = channel;
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}
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}
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return NULL;
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}
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cChannel *cChannels::GetByServiceID(int Source, unsigned short ServiceID)
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{
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for (cChannel *channel = First(); channel; channel = Next(channel)) {
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if (!channel->GroupSep() && channel->Source() == Source && channel->Sid() == ServiceID)
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return channel;
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}
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return NULL;
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}
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cChannel *cChannels::GetByChannelID(tChannelID ChannelID, bool TryWithoutRid)
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{
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for (cChannel *channel = First(); channel; channel = Next(channel)) {
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if (!channel->GroupSep() && channel->GetChannelID() == ChannelID)
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return channel;
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}
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if (TryWithoutRid) {
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ChannelID.ClrRid();
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for (cChannel *channel = First(); channel; channel = Next(channel)) {
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if (!channel->GroupSep() && channel->GetChannelID().ClrRid() == ChannelID)
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return channel;
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}
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}
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return NULL;
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}
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bool cChannels::HasUniqueChannelID(cChannel *NewChannel, cChannel *OldChannel)
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{
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tChannelID NewChannelID = NewChannel->GetChannelID();
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for (cChannel *channel = First(); channel; channel = Next(channel)) {
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if (!channel->GroupSep() && channel != OldChannel && channel->GetChannelID() == NewChannelID)
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return false;
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}
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return true;
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}
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bool cChannels::SwitchTo(int Number)
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{
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cChannel *channel = GetByNumber(Number);
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return channel && cDevice::PrimaryDevice()->SwitchChannel(channel, true);
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}
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