vdr  2.4.0
nit.c
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1 /*
2  * nit.c: NIT section filter
3  *
4  * See the main source file 'vdr.c' for copyright information and
5  * how to reach the author.
6  *
7  * $Id: nit.c 4.5 2018/03/18 10:52:21 kls Exp $
8  */
9 
10 #include "nit.h"
11 #include <linux/dvb/frontend.h>
12 #include "channels.h"
13 #include "dvbdevice.h"
14 #include "eitscan.h"
15 #include "libsi/section.h"
16 #include "libsi/descriptor.h"
17 #include "tools.h"
18 
19 #define DVB_SYSTEM_1 0 // see also dvbdevice.c
20 #define DVB_SYSTEM_2 1
21 
22 #define MAXNETWORKNAME Utf8BufSize(256)
23 
24 // Set to 'true' for debug output:
25 static bool DebugNit = false;
26 
27 #define dbgnit(a...) if (DebugNit) fprintf(stderr, a)
28 
30 {
31  sdtFilter = SdtFilter;
32  Set(0x10, SI::TableIdNIT);
33 }
34 
35 void cNitFilter::SetStatus(bool On)
36 {
39 }
40 
41 void cNitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length)
42 {
43  SI::NIT nit(Data, false);
44  if (!nit.CheckCRCAndParse())
45  return;
47  return;
48  if (DebugNit) {
49  char NetworkName[MAXNETWORKNAME] = "";
50  SI::Descriptor *d;
51  for (SI::Loop::Iterator it; (d = nit.commonDescriptors.getNext(it)); ) {
52  switch (d->getDescriptorTag()) {
55  nnd->name.getText(NetworkName, MAXNETWORKNAME);
56  }
57  break;
58  default: ;
59  }
60  delete d;
61  }
62  dbgnit("NIT: %02X %2d %2d %2d %s %d %d '%s'\n", Tid, nit.getVersionNumber(), nit.getSectionNumber(), nit.getLastSectionNumber(), *cSource::ToString(Source()), nit.getNetworkId(), Transponder(), NetworkName);
63  }
64  cStateKey StateKey;
65  cChannels *Channels = cChannels::GetChannelsWrite(StateKey, 10);
66  if (!Channels) {
67  sectionSyncer.Repeat(); // let's not miss any section of the NIT
68  return;
69  }
70  bool ChannelsModified = false;
72  for (SI::Loop::Iterator it; nit.transportStreamLoop.getNext(ts, it); ) {
73  SI::Descriptor *d;
74 
77  int NumFrequencies = fld ? fld->frequencies.getCount() + 1 : 1;
78  int Frequencies[NumFrequencies];
79  if (fld) {
80  int ct = fld->getCodingType();
81  if (ct > 0) {
82  int n = 1;
83  for (SI::Loop::Iterator it3; fld->frequencies.hasNext(it3); ) {
84  int f = fld->frequencies.getNext(it3);
85  switch (ct) {
86  case 1: f = BCD2INT(f) / 100; break;
87  case 2: f = BCD2INT(f) / 10; break;
88  case 3: f = f * 10; break;
89  default: ;
90  }
91  Frequencies[n++] = f;
92  dbgnit(" Frequencies[%d] = %d\n", n - 1, f);
93  }
94  }
95  else
96  NumFrequencies = 1;
97  }
98  delete fld;
99 
100  for (SI::Loop::Iterator it2; (d = ts.transportStreamDescriptors.getNext(it2)); ) {
101  switch (d->getDescriptorTag()) {
106  int Frequency = Frequencies[0] = BCD2INT(sd->getFrequency()) / 100;
107  static char Polarizations[] = { 'H', 'V', 'L', 'R' };
108  dtp.SetPolarization(Polarizations[sd->getPolarization()]);
109  static int CodeRates[] = { FEC_NONE, FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, FEC_8_9, FEC_3_5, FEC_4_5, FEC_9_10, FEC_AUTO, FEC_AUTO, FEC_AUTO, FEC_AUTO, FEC_AUTO, FEC_NONE };
110  dtp.SetCoderateH(CodeRates[sd->getFecInner()]);
111  static int Modulations[] = { QAM_AUTO, QPSK, PSK_8, QAM_16 };
112  dtp.SetModulation(Modulations[sd->getModulationType()]);
114  static int RollOffs[] = { ROLLOFF_35, ROLLOFF_25, ROLLOFF_20, ROLLOFF_AUTO };
115  dtp.SetRollOff(sd->getModulationSystem() ? RollOffs[sd->getRollOff()] : ROLLOFF_AUTO);
116  int SymbolRate = BCD2INT(sd->getSymbolRate()) / 10;
117  dbgnit(" %s %d %c %d %d\n", *cSource::ToString(Source), Frequency, dtp.Polarization(), SymbolRate, cChannel::Transponder(Frequency, dtp.Polarization()));
118  if (Setup.UpdateChannels >= 5) {
119  bool found = false;
120  bool forceTransponderUpdate = false;
121  for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) {
122  if (!Channel->GroupSep() && Channel->Source() == Source && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) {
123  // Preserve parameters set separately in S2SatelliteDeliverySystemDescriptor:
125  dtp.SetStreamId(dtpc.StreamId());
126  //
127  int transponder = Channel->Transponder();
128  found = true;
129  if (!ISTRANSPONDER(cChannel::Transponder(Frequency, dtp.Polarization()), transponder)) {
130  for (int n = 0; n < NumFrequencies; n++) {
131  if (ISTRANSPONDER(cChannel::Transponder(Frequencies[n], dtp.Polarization()), transponder)) {
132  Frequency = Frequencies[n];
133  break;
134  }
135  }
136  }
137  if (ISTRANSPONDER(cChannel::Transponder(Frequency, dtp.Polarization()), Transponder())) // only modify channels if we're actually receiving this transponder
138  ChannelsModified |= Channel->SetTransponderData(Source, Frequency, SymbolRate, dtp.ToString('S'));
139  else if (Channel->Srate() != SymbolRate || strcmp(Channel->Parameters(), dtp.ToString('S')))
140  forceTransponderUpdate = true; // get us receiving this transponder
141  }
142  }
143  if (!found || forceTransponderUpdate) {
144  for (int n = 0; n < NumFrequencies; n++) {
145  cChannel *Channel = new cChannel;
146  Channel->SetId(NULL, ts.getOriginalNetworkId(), ts.getTransportStreamId(), 0, 0);
147  if (Channel->SetTransponderData(Source, Frequencies[n], SymbolRate, dtp.ToString('S')))
149  else
150  delete Channel;
151  }
152  }
153  }
156  }
157  break;
159  if (Setup.UpdateChannels >= 5) {
160  for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) {
165  dbgnit(" stream id = %d\n", dtp.StreamId());
166  ChannelsModified |= Channel->SetTransponderData(Channel->Source(), Channel->Frequency(), Channel->Srate(), dtp.ToString('S'));
167  break;
168  }
169  }
170  }
171  }
172  break;
177  int Frequency = Frequencies[0] = BCD2INT(sd->getFrequency()) / 10;
178  //XXX FEC_outer???
179  static int CodeRates[] = { FEC_NONE, FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, FEC_8_9, FEC_3_5, FEC_4_5, FEC_9_10, FEC_AUTO, FEC_AUTO, FEC_AUTO, FEC_AUTO, FEC_AUTO, FEC_NONE };
180  dtp.SetCoderateH(CodeRates[sd->getFecInner()]);
181  static int Modulations[] = { QPSK, QAM_16, QAM_32, QAM_64, QAM_128, QAM_256, QAM_AUTO };
182  dtp.SetModulation(Modulations[min(sd->getModulation(), 6)]);
183  int SymbolRate = BCD2INT(sd->getSymbolRate()) / 10;
184  dbgnit(" %s %d %d %d %d\n", *cSource::ToString(Source), Frequency, dtp.CoderateH(), dtp.Modulation(), SymbolRate);
185  if (Setup.UpdateChannels >= 5) {
186  bool found = false;
187  bool forceTransponderUpdate = false;
188  for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) {
189  if (!Channel->GroupSep() && Channel->Source() == Source && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) {
190  int transponder = Channel->Transponder();
191  found = true;
192  if (!ISTRANSPONDER(Frequency / 1000, transponder)) {
193  for (int n = 0; n < NumFrequencies; n++) {
194  if (ISTRANSPONDER(Frequencies[n] / 1000, transponder)) {
195  Frequency = Frequencies[n];
196  break;
197  }
198  }
199  }
200  if (ISTRANSPONDER(Frequency / 1000, Transponder())) // only modify channels if we're actually receiving this transponder
201  ChannelsModified |= Channel->SetTransponderData(Source, Frequency, SymbolRate, dtp.ToString('C'));
202  else if (Channel->Srate() != SymbolRate || strcmp(Channel->Parameters(), dtp.ToString('C')))
203  forceTransponderUpdate = true; // get us receiving this transponder
204  }
205  }
206  if (!found || forceTransponderUpdate) {
207  for (int n = 0; n < NumFrequencies; n++) {
208  cChannel *Channel = new cChannel;
209  Channel->SetId(NULL, ts.getOriginalNetworkId(), ts.getTransportStreamId(), 0, 0);
210  if (Channel->SetTransponderData(Source, Frequencies[n], SymbolRate, dtp.ToString('C')))
212  else
213  delete Channel;
214  }
215  }
216  }
217  if (ISTRANSPONDER(Frequency / 1000, Transponder()))
219  }
220  break;
225  int Frequency = Frequencies[0] = sd->getFrequency() * 10;
226  static int Bandwidths[] = { 8000000, 7000000, 6000000, 5000000, 0, 0, 0, 0 };
227  dtp.SetBandwidth(Bandwidths[sd->getBandwidth()]);
228  static int Constellations[] = { QPSK, QAM_16, QAM_64, QAM_AUTO };
229  dtp.SetModulation(Constellations[sd->getConstellation()]);
230  dtp.SetSystem(DVB_SYSTEM_1);
231  static int Hierarchies[] = { HIERARCHY_NONE, HIERARCHY_1, HIERARCHY_2, HIERARCHY_4, HIERARCHY_AUTO, HIERARCHY_AUTO, HIERARCHY_AUTO, HIERARCHY_AUTO };
232  dtp.SetHierarchy(Hierarchies[sd->getHierarchy()]);
233  static int CodeRates[] = { FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, FEC_AUTO, FEC_AUTO, FEC_AUTO };
234  dtp.SetCoderateH(CodeRates[sd->getCodeRateHP()]);
235  dtp.SetCoderateL(CodeRates[sd->getCodeRateLP()]);
236  static int GuardIntervals[] = { GUARD_INTERVAL_1_32, GUARD_INTERVAL_1_16, GUARD_INTERVAL_1_8, GUARD_INTERVAL_1_4 };
237  dtp.SetGuard(GuardIntervals[sd->getGuardInterval()]);
238  static int TransmissionModes[] = { TRANSMISSION_MODE_2K, TRANSMISSION_MODE_8K, TRANSMISSION_MODE_4K, TRANSMISSION_MODE_AUTO };
239  dtp.SetTransmission(TransmissionModes[sd->getTransmissionMode()]);
240  dbgnit(" %s %d %d %d %d %d %d %d %d\n", *cSource::ToString(Source), Frequency, dtp.Bandwidth(), dtp.Modulation(), dtp.Hierarchy(), dtp.CoderateH(), dtp.CoderateL(), dtp.Guard(), dtp.Transmission());
241  if (Setup.UpdateChannels >= 5) {
242  bool found = false;
243  bool forceTransponderUpdate = false;
244  for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) {
245  if (!Channel->GroupSep() && Channel->Source() == Source && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) {
246  // Preserve parameters set separately in T2DeliverySystemDescripto:
248  dtp.SetSystem(dtpc.System());
249  dtp.SetStreamId(dtpc.StreamId());
250  dtp.SetT2SystemId(dtp.T2SystemId());
251  dtp.SetSisoMiso(dtpc.SisoMiso());
252  dtp.SetBandwidth(dtpc.Bandwidth());
253  dtp.SetGuard(dtpc.Guard());
254  dtp.SetTransmission(dtpc.Transmission());
255  //
256  int transponder = Channel->Transponder();
257  found = true;
258  if (!ISTRANSPONDER(Frequency / 1000000, transponder)) {
259  for (int n = 0; n < NumFrequencies; n++) {
260  if (ISTRANSPONDER(Frequencies[n] / 1000000, transponder)) {
261  Frequency = Frequencies[n];
262  break;
263  }
264  }
265  }
266  if (ISTRANSPONDER(Frequency / 1000000, Transponder())) // only modify channels if we're actually receiving this transponder
267  ChannelsModified |= Channel->SetTransponderData(Source, Frequency, 0, dtp.ToString('T'));
268  else if (strcmp(Channel->Parameters(), dtp.ToString('T')))
269  forceTransponderUpdate = true; // get us receiving this transponder
270  }
271  }
272  if (!found || forceTransponderUpdate) {
273  for (int n = 0; n < NumFrequencies; n++) {
274  cChannel *Channel = new cChannel;
275  Channel->SetId(NULL, ts.getOriginalNetworkId(), ts.getTransportStreamId(), 0, 0);
276  if (Channel->SetTransponderData(Source, Frequencies[n], 0, dtp.ToString('T')))
278  else
279  delete Channel;
280  }
281  }
282  }
283  if (ISTRANSPONDER(Frequency / 1000000, Transponder()))
285  }
286  break;
289  switch (sd->getExtensionDescriptorTag()) {
291  if (Setup.UpdateChannels >= 5) {
292  for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) {
294  if (!Channel->GroupSep() && Channel->Source() == Source && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) {
296  int Frequency = Channel->Frequency();
297  int SymbolRate = Channel->Srate();
299  dtp.SetSystem(DVB_SYSTEM_2);
300  dtp.SetStreamId(td->getPlpId());
301  dtp.SetT2SystemId(td->getT2SystemId());
302  if (td->getExtendedDataFlag()) {
303  dtp.SetSisoMiso(td->getSisoMiso());
304  static int T2Bandwidths[] = { 8000000, 7000000, 6000000, 5000000, 10000000, 1712000, 0, 0 };
305  dtp.SetBandwidth(T2Bandwidths[td->getBandwidth()]);
306  static int T2GuardIntervals[] = { GUARD_INTERVAL_1_32, GUARD_INTERVAL_1_16, GUARD_INTERVAL_1_8, GUARD_INTERVAL_1_4, GUARD_INTERVAL_1_128, GUARD_INTERVAL_19_128, GUARD_INTERVAL_19_256, 0 };
307  dtp.SetGuard(T2GuardIntervals[td->getGuardInterval()]);
308  static int T2TransmissionModes[] = { TRANSMISSION_MODE_2K, TRANSMISSION_MODE_8K, TRANSMISSION_MODE_4K, TRANSMISSION_MODE_1K, TRANSMISSION_MODE_16K, TRANSMISSION_MODE_32K, TRANSMISSION_MODE_AUTO, TRANSMISSION_MODE_AUTO };
309  dtp.SetTransmission(T2TransmissionModes[td->getTransmissionMode()]);
310  //TODO add parsing of frequencies
311  }
312  dbgnit(" stream id = %d\n", dtp.StreamId());
313  ChannelsModified |= Channel->SetTransponderData(Source, Frequency, SymbolRate, dtp.ToString('T'));
314  }
315  }
316  }
317  }
318  break;
319  default: ;
320  }
321  }
322  break;
327  for (SI::Loop::Iterator it4; lcd->logicalChannelLoop.getNext(LogicalChannel, it4); ) {
328  if (LogicalChannel.getVisibleServiceFlag()) {
329  int lcn = LogicalChannel.getLogicalChannelNumber();
330  int sid = LogicalChannel.getServiceId();
331  for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) {
332  if (!Channel->GroupSep() && Channel->Sid() == sid && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) {
333  ChannelsModified |= Channel->SetLcn(lcn);
334  break;
335  }
336  }
337  }
338  }
339  }
340  break;
345  for (SI::Loop::Iterator it4; lcd->hdSimulcastLogicalChannelLoop.getNext(HdSimulcastLogicalChannel, it4); ) {
346  if (HdSimulcastLogicalChannel.getVisibleServiceFlag()) {
347  int lcn = HdSimulcastLogicalChannel.getLogicalChannelNumber();
348  int sid = HdSimulcastLogicalChannel.getServiceId();
349  for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) {
350  if (!Channel->GroupSep() && Channel->Sid() == sid && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) {
351  ChannelsModified |= Channel->SetLcn(lcn);
352  break;
353  }
354  }
355  }
356  }
357  }
358  break;
359  default: ;
360  }
361  delete d;
362  }
363  }
364  StateKey.Remove(ChannelsModified);
365 }
static cString ToString(int Code)
Definition: sources.c:55
int CoderateH(void) const
Definition: dvbdevice.h:132
void SetTransmission(int Transmission)
Definition: dvbdevice.h:151
cSdtFilter * sdtFilter
Definition: nit.h:19
int getOriginalNetworkId() const
Definition: section.c:106
void SetPolarization(char Polarization)
Definition: dvbdevice.h:144
int StandardCompliance
Definition: config.h:284
int getVersionNumber() const
Definition: si.c:84
char * getText()
Definition: si.c:222
int Modulation(void) const
Definition: dvbdevice.h:134
int Srate(void) const
Definition: channels.h:151
StructureLoop< LogicalChannel > logicalChannelLoop
Definition: descriptor.h:571
cEITScanner EITScanner
Definition: eitscan.c:90
Definition: sdt.h:16
cString ToString(char Type) const
Definition: dvbdevice.c:212
int Source(void) const
Definition: channels.h:150
void Remove(bool IncState=true)
Removes this key from the lock it was previously used with.
Definition: thread.c:859
const cChannel * Channel(void)
Returns the channel of the data delivered to this filter.
Definition: filter.c:124
int BCD2INT(int x)
Definition: tools.c:45
bool SetId(cChannels *Channels, int Nid, int Tid, int Sid, int Rid=0)
Definition: channels.c:226
int Nid(void) const
Definition: channels.h:172
cSectionSyncer sectionSyncer
Definition: nit.h:18
void SetSisoMiso(int SisoMiso)
Definition: dvbdevice.h:157
T min(T a, T b)
Definition: tools.h:59
int getExtensionDescriptorTag() const
Definition: descriptor.c:875
StructureLoop< HdSimulcastLogicalChannel > hdSimulcastLogicalChannelLoop
Definition: descriptor.h:589
void SetCoderateH(int CoderateH)
Definition: dvbdevice.h:147
void SetRollOff(int RollOff)
Definition: dvbdevice.h:154
DescriptorLoop transportStreamDescriptors
Definition: section.h:100
bool SetTransponderData(int Source, int Frequency, int Srate, const char *Parameters, bool Quiet=false)
Definition: channels.c:176
#define DVB_SYSTEM_2
Definition: nit.c:20
DescriptorLoop commonDescriptors
Definition: section.h:106
static cChannels * GetChannelsWrite(cStateKey &StateKey, int TimeoutMs=0)
Gets the list of channels for write access.
Definition: channels.c:854
int Transponder(void) const
Returns the transponder frequency in MHz, plus the polarization in case of sat.
Definition: channels.c:146
bool Sync(uchar Version, int Number, int LastNumber)
Definition: filter.c:36
int Bandwidth(void) const
Definition: dvbdevice.h:131
void Trigger(int Source)
Definition: sdt.c:39
void SetT2SystemId(int T2SystemId)
Definition: dvbdevice.h:156
virtual void Process(u_short Pid, u_char Tid, const u_char *Data, int Length)
Processes the data delivered to this filter.
Definition: nit.c:41
#define ISTRANSPONDER(f1, f2)
Definition: channels.h:18
static bool DebugNit
Definition: nit.c:25
#define STANDARD_NORDIG
Definition: config.h:72
int Hierarchy(void) const
Definition: dvbdevice.h:138
void SetSystem(int System)
Definition: dvbdevice.h:150
int Sid(void) const
Definition: channels.h:174
int Source(void)
Returns the source of the data delivered to this filter.
Definition: filter.c:114
bool GroupSep(void) const
Definition: channels.h:179
StructureLoop< TransportStream > transportStreamLoop
Definition: section.h:107
char Polarization(void) const
Definition: dvbdevice.h:129
static bool IsSat(int Code)
Definition: sources.h:57
cSetup Setup
Definition: config.c:372
void Repeat(void)
Definition: filter.c:29
virtual void SetStatus(bool On)
Turns this filter on or off, depending on the value of On.
Definition: nit.c:35
int Guard(void) const
Definition: dvbdevice.h:137
int Tid(void) const
Definition: channels.h:173
int getTransportStreamId() const
Definition: section.c:102
bool SetLcn(int Lcn)
Definition: channels.c:246
const T * First(void) const
Returns the first element in this list, or NULL if the list is empty.
Definition: tools.h:606
int getSectionNumber() const
Definition: si.c:88
#define MAXNETWORKNAME
Definition: nit.c:22
bool CheckCRCAndParse()
Definition: si.c:65
bool hasNext(Iterator &it)
Definition: si.h:459
int CoderateL(void) const
Definition: dvbdevice.h:133
virtual void SetStatus(bool On)
Turns this filter on or off, depending on the value of On.
Definition: filter.c:129
#define dbgnit(a...)
Definition: nit.c:27
int T2SystemId(void) const
Definition: dvbdevice.h:141
int Frequency(void) const
Returns the actual frequency, as given in 'channels.conf'.
Definition: channels.h:147
int getNetworkId() const
Definition: section.c:89
unsigned char u_char
Definition: headers.h:24
T getNext(Iterator &it) const
Definition: si.h:453
int UpdateChannels
Definition: config.h:319
void SetStreamId(int StreamId)
Definition: dvbdevice.h:155
void SetHierarchy(int Hierarchy)
Definition: dvbdevice.h:153
void SetGuard(int Guard)
Definition: dvbdevice.h:152
int Transmission(void) const
Definition: dvbdevice.h:136
DescriptorTag getDescriptorTag() const
Definition: si.c:100
int Transponder(void)
Returns the transponder of the data delivered to this filter.
Definition: filter.c:119
void Set(u_short Pid, u_char Tid, u_char Mask=0xFF)
Sets the given filter data by calling Add() with Sticky = true.
Definition: filter.c:162
void SetCoderateL(int CoderateL)
Definition: dvbdevice.h:148
void AddTransponder(cChannel *Channel)
Definition: eitscan.c:106
cNitFilter(cSdtFilter *SdtFilter)
Definition: nit.c:29
#define DVB_SYSTEM_1
Definition: nit.c:19
static int FromData(eSourceType SourceType, int Position=0, bool East=false)
Definition: sources.c:104
void Reset(void)
Definition: filter.c:20
const char * Parameters(void) const
Definition: channels.h:180
int getCount()
Definition: si.h:436
TypeLoop< ThirtyTwoBit > frequencies
Definition: descriptor.h:350
Descriptor * getNext(Iterator &it)
Definition: si.c:112
int getLastSectionNumber() const
Definition: si.c:92
const T * Next(const T *Object) const
< Returns the element immediately before Object in this list, or NULL if Object is the first element ...
Definition: tools.h:613
void SetBandwidth(int Bandwidth)
Definition: dvbdevice.h:146
void SetModulation(int Modulation)
Definition: dvbdevice.h:149