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authorPiotr Krysik <perper@o2.pl>2009-06-27 13:14:30 +0200
committerPiotr Krysik <perper@o2.pl>2009-06-27 13:14:30 +0200
commitf1df46a5c04d38f155cd8f8c8315eeb1f3fc7c2e (patch)
treef429192356666ad9ce6f478e539f9b69b9ce4a94 /src/lib/decoder/openbtsstuff/GSMCommon.cpp
parent81c29dbb877de8a39019ad1947936245d4c34207 (diff)
added files from openbts for tch/f decoding and removed openbts
Diffstat (limited to 'src/lib/decoder/openbtsstuff/GSMCommon.cpp')
-rw-r--r--src/lib/decoder/openbtsstuff/GSMCommon.cpp315
1 files changed, 315 insertions, 0 deletions
diff --git a/src/lib/decoder/openbtsstuff/GSMCommon.cpp b/src/lib/decoder/openbtsstuff/GSMCommon.cpp
new file mode 100644
index 0000000..0bec812
--- /dev/null
+++ b/src/lib/decoder/openbtsstuff/GSMCommon.cpp
@@ -0,0 +1,315 @@
+/*
+* Copyright 2008 Free Software Foundation, Inc.
+*
+* This software is distributed under the terms of the GNU Public License.
+* See the COPYING file in the main directory for details.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+#include "GSMCommon.h"
+
+using namespace GSM;
+using namespace std;
+
+
+ostream& GSM::operator<<(ostream& os, L3PD val)
+{
+ switch (val) {
+ case L3CallControlPD: os << "Call Control"; break;
+ case L3MobilityManagementPD: os << "Mobility Management"; break;
+ case L3RadioResourcePD: os << "Radio Resource"; break;
+ default: os << hex << "0x" << (int)val << dec;
+ }
+ return os;
+}
+
+
+const BitVector GSM::gTrainingSequence[] = {
+ BitVector("00100101110000100010010111"),
+ BitVector("00101101110111100010110111"),
+ BitVector("01000011101110100100001110"),
+ BitVector("01000111101101000100011110"),
+ BitVector("00011010111001000001101011"),
+ BitVector("01001110101100000100111010"),
+ BitVector("10100111110110001010011111"),
+ BitVector("11101111000100101110111100"),
+};
+
+const BitVector GSM::gDummyBurst("0001111101101110110000010100100111000001001000100000001111100011100010111000101110001010111010010100011001100111001111010011111000100101111101010000");
+
+const BitVector GSM::gRACHSynchSequence("01001011011111111001100110101010001111000");
+
+
+
+char encodeGSMChar(char ascii)
+{
+ // Given an ASCII char, return the corresponding GSM char.
+ static char reverseTable[256]={0};
+ static bool init = false;
+ if (!init) {
+ for (size_t i=0; i<sizeof(gGSMAlphabet); i++) {
+ reverseTable[(unsigned)gGSMAlphabet[i]]=i;
+ }
+ init=true;
+ }
+ return reverseTable[(unsigned)ascii];
+}
+
+
+char encodeBCDChar(char ascii)
+{
+ // Given an ASCII char, return the corresponding BCD.
+ if ((ascii>='0') && (ascii<='9')) return ascii-'0';
+ switch (ascii) {
+ case '.': return 11;
+ case '*': return 11;
+ case '#': return 12;
+ case 'a': return 13;
+ case 'b': return 14;
+ case 'c': return 15;
+ default: return 15;
+ }
+}
+
+
+
+
+unsigned GSM::uplinkFreqKHz(GSMBand band, unsigned ARFCN)
+{
+ switch (band) {
+ case GSM850:
+ assert((ARFCN<252)&&(ARFCN>129));
+ return 824200+200*(ARFCN-128);
+ case EGSM900:
+ if (ARFCN<=124) return 890000+200*ARFCN;
+ assert((ARFCN>974)&&(ARFCN<1024));
+ return 890000+200*(ARFCN-1024);
+ case DCS1800:
+ assert((ARFCN>511)&&(ARFCN<886));
+ return 1710200+200*(ARFCN-512);
+ case PCS1900:
+ assert((ARFCN>511)&&(ARFCN<811));
+ return 1850200+200*(ARFCN-512);
+ default:
+ abort();
+ }
+}
+
+
+unsigned GSM::downlinkFreqKHz(GSMBand band, unsigned ARFCN)
+{
+ static unsigned uplinkOffset[] = {
+ 45000, // 850
+ 45000, // 900
+ 95000, // 1800
+ 80000 // 1900
+ };
+ return uplinkFreqKHz(band,ARFCN) + uplinkOffset[band];
+}
+
+
+
+
+int32_t GSM::FNDelta(int32_t v1, int32_t v2)
+{
+ static const int64_t halfModulus = gHyperframe/2;
+ int32_t delta = v1-v2;
+ if (delta>halfModulus) delta -= gHyperframe;
+ else if (delta<-halfModulus) delta += gHyperframe;
+ return (int32_t) delta;
+}
+
+int GSM::FNCompare(int32_t v1, int32_t v2)
+{
+ int32_t delta = FNDelta(v1,v2);
+ if (delta==0) return 0;
+ else if (delta>0) return 1;
+ else return -1;
+}
+
+
+
+
+ostream& GSM::operator<<(ostream& os, const Time& t)
+{
+ os << t.TN() << ":" << t.FN();
+ return os;
+}
+
+
+
+
+void Clock::set(const Time& when)
+{
+ mLock.lock();
+ mBaseTime = Timeval(0);
+ mBaseFN = when.FN();
+ mLock.unlock();
+}
+
+
+int32_t Clock::FN() const
+{
+ mLock.lock();
+ Timeval now;
+ int deltaSec = now.sec() - mBaseTime.sec();
+ int deltaUSec = now.usec() - mBaseTime.usec();
+ int elapsedUSec = 1000000*deltaSec + deltaUSec;
+ int elapsedFrames = elapsedUSec / gFrameMicroseconds;
+ int32_t currentFN = (mBaseFN + elapsedFrames) % gHyperframe;
+ mLock.unlock();
+ return currentFN;
+}
+
+
+void Clock::wait(const Time& when) const
+{
+ int32_t now = FN();
+ int32_t target = when.FN();
+ int32_t delta = FNDelta(target,now);
+ if (delta<1) return;
+ const int32_t maxSleep = 51*26;
+ if (delta>maxSleep) delta=maxSleep;
+ sleepFrames(delta);
+}
+
+
+
+
+
+
+
+ostream& GSM::operator<<(ostream& os, TypeOfNumber type)
+{
+ switch (type) {
+ case UnknownTypeOfNumber: os << "unknown"; break;
+ case InternationalNumber: os << "international"; break;
+ case NationalNumber: os << "national"; break;
+ case NetworkSpecificNumber: os << "network-specific"; break;
+ case ShortCodeNumber: os << "short code"; break;
+ default: os << "?" << type << "?";
+ }
+ return os;
+}
+
+
+ostream& GSM::operator<<(ostream& os, NumberingPlan plan)
+{
+ switch (plan) {
+ case UnknownPlan: os << "unknown"; break;
+ case E164Plan: os << "E.164/ISDN"; break;
+ case X121Plan: os << "X.121/data"; break;
+ case F69Plan: os << "F.69/Telex"; break;
+ case NationalPlan: os << "national"; break;
+ case PrivatePlan: os << "private"; break;
+ default: os << "?" << (int)plan << "?";
+ }
+ return os;
+}
+
+ostream& GSM::operator<<(ostream& os, MobileIDType wID)
+{
+ switch (wID) {
+ case NoIDType: os << "None"; break;
+ case IMSIType: os << "IMSI"; break;
+ case IMEIType: os << "IMEI"; break;
+ case TMSIType: os << "TMSI"; break;
+ case IMEISVType: os << "IMEISV"; break;
+ default: os << "?" << (int)wID << "?";
+ }
+ return os;
+}
+
+
+ostream& GSM::operator<<(ostream& os, TypeAndOffset tao)
+{
+ switch (tao) {
+ case TDMA_MISC: os << "(misc)"; break;
+ case TCHF_0: os << "TCH/F"; break;
+ case TCHH_0: os << "TCH/H-0"; break;
+ case TCHH_1: os << "TCH/H-1"; break;
+ case SDCCH_4_0: os << "SDCCH/4-0"; break;
+ case SDCCH_4_1: os << "SDCCH/4-1"; break;
+ case SDCCH_4_2: os << "SDCCH/4-2"; break;
+ case SDCCH_4_3: os << "SDCCH/4-3"; break;
+ case SDCCH_8_0: os << "SDCCH/8-0"; break;
+ case SDCCH_8_1: os << "SDCCH/8-1"; break;
+ case SDCCH_8_2: os << "SDCCH/8-2"; break;
+ case SDCCH_8_3: os << "SDCCH/8-3"; break;
+ case SDCCH_8_4: os << "SDCCH/8-4"; break;
+ case SDCCH_8_5: os << "SDCCH/8-5"; break;
+ case SDCCH_8_6: os << "SDCCH/8-6"; break;
+ case SDCCH_8_7: os << "SDCCH/8-7"; break;
+ case TDMA_BEACON: os << "(beacon)"; break;
+ default: os << "?" << (int)tao << "?";
+ }
+ return os;
+}
+
+ostream& GSM::operator<<(ostream& os, ChannelType val)
+{
+ switch (val) {
+ case UndefinedCHType: os << "undefined"; return os;
+ case SCHType: os << "SCH"; break;
+ case FCCHType: os << "FCCH"; break;
+ case BCCHType: os << "BCCH"; break;
+ case RACHType: os << "RACH"; break;
+ case SDCCHType: os << "SDCCH"; break;
+ case FACCHType: os << "FACCH"; break;
+ case CCCHType: os << "CCCH"; break;
+ case SACCHType: os << "SACCH"; break;
+ case TCHFType: os << "TCH/F"; break;
+ case TCHHType: os << "TCH/H"; break;
+ case AnyTCHType: os << "any TCH"; break;
+ case LoopbackFullType: os << "Loopback Full"; break;
+ case LoopbackHalfType: os << "Loopback Half"; break;
+ case AnyDCCHType: os << "any DCCH"; break;
+ default: os << "?" << (int)val << "?";
+ }
+ return os;
+}
+
+
+
+
+bool Z100Timer::expired() const
+{
+ // A non-active timer does not expire.
+ if (!mActive) return false;
+ return mEndTime.passed();
+}
+
+void Z100Timer::set()
+{
+ mEndTime = Timeval(mLimitTime);
+ mActive=true;
+}
+
+long Z100Timer::remaining() const
+{
+ if (!mActive) return 0;
+ long rem = mEndTime.remaining();
+ if (rem<0) rem=0;
+ return rem;
+}
+
+void Z100Timer::wait() const
+{
+ while (!expired()) msleep(remaining());
+}
+
+// vim: ts=4 sw=4
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