frodovdr
/
vdr
mirror of https://github.com/VDR4Arch/vdr.git
1
0
Fork 0
Code Issues Releases Wiki Activity
vdr/libsi/si.c

509 lines
16 KiB
C
Raw Blame History

/***************************************************************************
* Copyright (c) 2003 by Marcel Wiesweg *
* *
* 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 2 of the License, or *
* (at your option) any later version. *
* *
* $Id: si.c 1.14 2005/05/28 14:11:16 kls Exp $
* *
***************************************************************************/
#include <string.h>
#include "si.h"
#include "descriptor.h"
namespace SI {
Object::Object() {
}
Object::Object(CharArray &d) : data(d) {
}
void Object::setData(const unsigned char*d, unsigned int size, bool doCopy) {
data.assign(d, size, doCopy);
}
void Object::setData(CharArray &d) {
data=d;
}
bool Object::checkSize(unsigned int offset) {
return data.checkSize(offset);
}
Section::Section(const unsigned char *data, bool doCopy) {
setData(data, getLength(data), doCopy);
}
TableId Section::getTableId() const {
return getTableId(data.getData());
}
int Section::getLength() {
return getLength(data.getData());
}
TableId Section::getTableId(const unsigned char *d) {
return (TableId)((const SectionHeader *)d)->table_id;
}
int Section::getLength(const unsigned char *d) {
return HILO(((const SectionHeader *)d)->section_length)+sizeof(SectionHeader);
}
bool CRCSection::isCRCValid() {
return CRC32::isValid((const char *)data.getData(), getLength()/*, data.FourBytes(getLength()-4)*/);
}
bool CRCSection::CheckCRCAndParse() {
if (!isCRCValid())
return false;
CheckParse();
return isValid();
}
int NumberedSection::getTableIdExtension() const {
return getTableIdExtension(data.getData());
}
int NumberedSection::getTableIdExtension(const unsigned char *d) {
return HILO(((const ExtendedSectionHeader *)d)->table_id_extension);
}
bool NumberedSection::getCurrentNextIndicator() const {
return data.getData<ExtendedSectionHeader>()->current_next_indicator;
}
int NumberedSection::getVersionNumber() const {
return data.getData<ExtendedSectionHeader>()->version_number;
}
int NumberedSection::getSectionNumber() const {
return data.getData<ExtendedSectionHeader>()->section_number;
}
int NumberedSection::getLastSectionNumber() const {
return data.getData<ExtendedSectionHeader>()->last_section_number;
}
int Descriptor::getLength() {
return getLength(data.getData());
}
DescriptorTag Descriptor::getDescriptorTag() const {
return getDescriptorTag(data.getData());
}
int Descriptor::getLength(const unsigned char *d) {
return ((const DescriptorHeader*)d)->descriptor_length+sizeof(DescriptorHeader);
}
DescriptorTag Descriptor::getDescriptorTag(const unsigned char *d) {
return (DescriptorTag)((const DescriptorHeader*)d)->descriptor_tag;
}
Descriptor *DescriptorLoop::getNext(Iterator &it) {
if (isValid() && it.i<getLength()) {
return createDescriptor(it.i, true);
}
return 0;
}
Descriptor *DescriptorLoop::getNext(Iterator &it, DescriptorTag tag, bool returnUnimplemetedDescriptor) {
Descriptor *d=0;
int len;
if (isValid() && it.i<(len=getLength())) {
const unsigned char *p=data.getData(it.i);
const unsigned char *end=p+len-it.i;
while (p < end) {
if (Descriptor::getDescriptorTag(p) == tag) {
d=createDescriptor(it.i, returnUnimplemetedDescriptor);
if (d)
break;
}
it.i+=Descriptor::getLength(p);
p+=Descriptor::getLength(p);
}
}
return d;
}
Descriptor *DescriptorLoop::getNext(Iterator &it, DescriptorTag *tags, int arrayLength, bool returnUnimplementedDescriptor) {
Descriptor *d=0;
int len;
if (isValid() && it.i<(len=getLength())) {
const unsigned char *p=data.getData(it.i);
const unsigned char *end=p+len-it.i;
while (p < end) {
for (int u=0; u<arrayLength;u++)
if (Descriptor::getDescriptorTag(p) == tags[u]) {
d=createDescriptor(it.i, returnUnimplementedDescriptor);
break;
}
if (d)
break; //length is added to it.i by createDescriptor, break here
it.i+=Descriptor::getLength(p);
p+=Descriptor::getLength(p);
}
}
return d;
}
Descriptor *DescriptorLoop::createDescriptor(int &i, bool returnUnimplemetedDescriptor) {
if (!checkSize(Descriptor::getLength(data.getData(i))))
return 0;
Descriptor *d=Descriptor::getDescriptor(data+i, domain, returnUnimplemetedDescriptor);
if (!d)
return 0;
i+=d->getLength();
d->CheckParse();
return d;
}
int DescriptorLoop::getNumberOfDescriptors() {
const unsigned char *p=data.getData();
const unsigned char *end=p+getLength();
int count=0;
while (p < end) {
count++;
p+=Descriptor::getLength(p);
}
return count;
}
DescriptorGroup::DescriptorGroup(bool del) {
array=0;
length=0;
deleteOnDesctruction=del;
}
DescriptorGroup::~DescriptorGroup() {
if (deleteOnDesctruction)
Delete();
delete[] array;
}
void DescriptorGroup::Delete() {
for (int i=0;i<length;i++)
if (array[i]!=0) {
delete array[i];
array[i]=0;
}
}
void DescriptorGroup::Add(GroupDescriptor *d) {
if (!array) {
length=d->getLastDescriptorNumber()+1;
array=new GroupDescriptor*[length]; //numbering is zero-based
for (int i=0;i<length;i++)
array[i]=0;
} else if (length != d->getLastDescriptorNumber()+1)
return; //avoid crash in case of misuse
array[d->getDescriptorNumber()]=d;
}
bool DescriptorGroup::isComplete() {
for (int i=0;i<length;i++)
if (array[i]==0)
return false;
return true;
}
char *String::getText() {
int len=getLength();
if (len < 0 || len > 4095)
return strdup("text error"); // caller will delete it!
char *data=new char(len+1);
decodeText(data, len+1);
return data;
}
char *String::getText(char *buffer, int size) {
int len=getLength();
if (len < 0 || len >= size) {
strncpy(buffer, "text error", size);
buffer[size-1] = 0;
return buffer;
}
decodeText(buffer, size);
return buffer;
}
//taken from VDR, Copyright Klaus Schmidinger <kls@cadsoft.de>
char *String::getText(char *buffer, char *shortVersion, int sizeBuffer, int sizeShortVersion) {
int len=getLength();
if (len < 0 || len >= sizeBuffer) {
strncpy(buffer, "text error", sizeBuffer);
buffer[sizeBuffer-1] = 0;
*shortVersion = 0;
return buffer;
}
decodeText(buffer, shortVersion, sizeBuffer, sizeShortVersion);
return buffer;
}
//taken from libdtv, Copyright Rolf Hakenes <hakenes@hippomi.de>
void String::decodeText(char *buffer, int size) {
const unsigned char *from=data.getData(0);
char *to=buffer;
/* Disable detection of coding tables - libdtv doesn't do it either
if ( (0x01 <= *from) && (*from <= 0x1f) ) {
codeTable=*from
}
*/
if (*from == 0x10)
from += 3; // skips code table info
int len=getLength();
for (int i = 0; i < len; i++) {
if (*from == 0)
break;
if ( ((' ' <= *from) && (*from <= '~'))
|| (*from == '\n')
|| (0xA0 <= *from)
|| (*from == 0x86 || *from == 0x87)
)
*to++ = *from;
else if (*from == 0x8A)
*to++ = '\n';
from++;
if (to - buffer >= size - 1)
break;
}
*to = '\0';
}
void String::decodeText(char *buffer, char *shortVersion, int sizeBuffer, int sizeShortVersion) {
const unsigned char *from=data.getData(0);
char *to=buffer;
char *toShort=shortVersion;
int IsShortName=0;
if (*from == 0x10)
from += 3; // skips code table info
int len=getLength();
for (int i = 0; i < len; i++) {
if ( ((' ' <= *from) && (*from <= '~'))
|| (*from == '\n')
|| (0xA0 <= *from)
)
{
*to++ = *from;
if (IsShortName)
*toShort++ = *from;
}
else if (*from == 0x8A)
*to++ = '\n';
else if (*from == 0x86)
IsShortName++;
else if (*from == 0x87)
IsShortName--;
else if (*from == 0)
break;
from++;
if (to - buffer >= sizeBuffer - 1 || toShort - shortVersion >= sizeShortVersion - 1)
break;
}
*to = '\0';
*toShort = '\0';
}
Descriptor *Descriptor::getDescriptor(CharArray da, DescriptorTagDomain domain, bool returnUnimplemetedDescriptor) {
Descriptor *d=0;
switch (domain) {
case SI:
switch ((DescriptorTag)da.getData<DescriptorHeader>()->descriptor_tag) {
case CaDescriptorTag:
d=new CaDescriptor();
break;
case CarouselIdentifierDescriptorTag:
d=new CarouselIdentifierDescriptor();
break;
case NetworkNameDescriptorTag:
d=new NetworkNameDescriptor();
break;
case ServiceListDescriptorTag:
d=new ServiceListDescriptor();
break;
case SatelliteDeliverySystemDescriptorTag:
d=new SatelliteDeliverySystemDescriptor();
break;
case CableDeliverySystemDescriptorTag:
d=new CableDeliverySystemDescriptor();
break;
case TerrestrialDeliverySystemDescriptorTag:
d=new TerrestrialDeliverySystemDescriptor();
break;
case BouquetNameDescriptorTag:
d=new BouquetNameDescriptor();
break;
case ServiceDescriptorTag:
d=new ServiceDescriptor();
break;
case NVODReferenceDescriptorTag:
d=new NVODReferenceDescriptor();
break;
case TimeShiftedServiceDescriptorTag:
d=new TimeShiftedServiceDescriptor();
break;
case ComponentDescriptorTag:
d=new ComponentDescriptor();
break;
case StreamIdentifierDescriptorTag:
d=new StreamIdentifierDescriptor();
break;
case SubtitlingDescriptorTag:
d=new SubtitlingDescriptor();
break;
case MultilingualNetworkNameDescriptorTag:
d=new MultilingualNetworkNameDescriptor();
break;
case MultilingualBouquetNameDescriptorTag:
d=new MultilingualBouquetNameDescriptor();
break;
case MultilingualServiceNameDescriptorTag:
d=new MultilingualServiceNameDescriptor();
break;
case MultilingualComponentDescriptorTag:
d=new MultilingualComponentDescriptor();
break;
case ServiceMoveDescriptorTag:
d=new ServiceMoveDescriptor();
break;
case FrequencyListDescriptorTag:
d=new FrequencyListDescriptor();
break;
case ServiceIdentifierDescriptorTag:
d=new ServiceIdentifierDescriptor();
break;
case CaIdentifierDescriptorTag:
d=new CaIdentifierDescriptor();
break;
case ShortEventDescriptorTag:
d=new ShortEventDescriptor();
break;
case ExtendedEventDescriptorTag:
d=new ExtendedEventDescriptor();
break;
case TimeShiftedEventDescriptorTag:
d=new TimeShiftedEventDescriptor();
break;
case ContentDescriptorTag:
d=new ContentDescriptor();
break;
case ParentalRatingDescriptorTag:
d=new ParentalRatingDescriptor();
break;
case ApplicationSignallingDescriptorTag:
d=new ApplicationSignallingDescriptor();
break;
case LinkageDescriptorTag:
d=new LinkageDescriptor();
break;
case ISO639LanguageDescriptorTag:
d=new ISO639LanguageDescriptor();
break;
case PDCDescriptorTag:
d=new PDCDescriptor();
break;
//note that it is no problem to implement one
//of the unimplemented descriptors.
//defined in ISO-13818-1
case VideoStreamDescriptorTag:
case AudioStreamDescriptorTag:
case HierarchyDescriptorTag:
case RegistrationDescriptorTag:
case DataStreamAlignmentDescriptorTag:
case TargetBackgroundGridDescriptorTag:
case VideoWindowDescriptorTag:
case SystemClockDescriptorTag:
case MultiplexBufferUtilizationDescriptorTag:
case CopyrightDescriptorTag:
case MaximumBitrateDescriptorTag:
case PrivateDataIndicatorDescriptorTag:
case SmoothingBufferDescriptorTag:
case STDDescriptorTag:
case IBPDescriptorTag:
//defined in ETSI EN 300 468
case StuffingDescriptorTag:
case VBIDataDescriptorTag:
case VBITeletextDescriptorTag:
case CountryAvailabilityDescriptorTag:
case MocaicDescriptorTag:
case TeletextDescriptorTag:
case TelephoneDescriptorTag:
case LocalTimeOffsetDescriptorTag:
case PrivateDataSpecifierDescriptorTag:
case CellListDescriptorTag:
case CellFrequencyLinkDescriptorTag:
case ServiceAvailabilityDescriptorTag:
case ShortSmoothingBufferDescriptorTag:
case PartialTransportStreamDescriptorTag:
case DataBroadcastDescriptorTag:
case DataBroadcastIdDescriptorTag:
case CaSystemDescriptorTag:
case AC3DescriptorTag:
case DSNGDescriptorTag:
case AncillaryDataDescriptorTag:
case AnnouncementSupportDescriptorTag:
case AdaptationFieldDataDescriptorTag:
case TransportStreamDescriptorTag:
default:
if (!returnUnimplemetedDescriptor)
return 0;
d=new UnimplementedDescriptor();
break;
}
break;
case MHP:
switch ((DescriptorTag)da.getData<DescriptorHeader>()->descriptor_tag) {
// They once again start with 0x00 (see page 234, MHP specification)
case MHP_ApplicationDescriptorTag:
d=new MHP_ApplicationDescriptor();
break;
case MHP_ApplicationNameDescriptorTag:
d=new MHP_ApplicationNameDescriptor();
break;
case MHP_TransportProtocolDescriptorTag:
d=new MHP_TransportProtocolDescriptor();
break;
case MHP_DVBJApplicationDescriptorTag:
d=new MHP_DVBJApplicationDescriptor();
break;
case MHP_DVBJApplicationLocationDescriptorTag:
d=new MHP_DVBJApplicationLocationDescriptor();
break;
// 0x05 - 0x0A is unimplemented this library
case MHP_ExternalApplicationAuthorisationDescriptorTag:
case MHP_IPv4RoutingDescriptorTag:
case MHP_IPv6RoutingDescriptorTag:
case MHP_DVBHTMLApplicationDescriptorTag:
case MHP_DVBHTMLApplicationLocationDescriptorTag:
case MHP_DVBHTMLApplicationBoundaryDescriptorTag:
case MHP_ApplicationIconsDescriptorTag:
case MHP_PrefetchDescriptorTag:
case MHP_DelegatedApplicationDescriptorTag:
case MHP_ApplicationStorageDescriptorTag:
default:
if (!returnUnimplemetedDescriptor)
return 0;
d=new UnimplementedDescriptor();
break;
}
break;
}
d->setData(da);
return d;
}
} //end of namespace
Reference in New Issue View Git Blame Copy Permalink