ApplicationInformationSection::ApplicationInformationSection(const uint8_t * const buffer) : LongCrcSection(buffer)
{
commonDescriptorsLength = sectionLength > 10 ? DVB_LENGTH(&buffer[8]) : 0;
uint16_t pos = 10;
uint16_t bytesLeft = sectionLength > 11 ? sectionLength - 11 : 0;
uint16_t loopLength = 0;
uint16_t bytesLeft2 = commonDescriptorsLength;
while (bytesLeft >= bytesLeft && bytesLeft2 > 1 && bytesLeft2 >= (loopLength = 2 + buffer[pos+1])) {
descriptor(&buffer[pos], SCOPE_MHP);
pos += loopLength;
bytesLeft -= loopLength;
bytesLeft2 -= loopLength;
}
if (!bytesLeft2 && bytesLeft > 1) {
bytesLeft2 = applicationLoopLength = DVB_LENGTH(&buffer[pos]);
pos+=2;
bytesLeft-=2;
while (bytesLeft >= bytesLeft2 && bytesLeft2 > 8 && bytesLeft2 >= (loopLength = 8 + DVB_LENGTH(&buffer[pos+7]))) {
applicationInformation.push_back(new ApplicationInformation(&buffer[pos]));
pos += loopLength;
bytesLeft -= loopLength;
bytesLeft2 -= loopLength;
}
}
else
applicationLoopLength = 0;
}
NetworkInformationSection::NetworkInformationSection(const uint8_t * const buffer) : LongCrcSection(buffer)
{
networkId = UINT16(&buffer[3]);
networkDescriptorsLength = sectionLength > 9 ? DVB_LENGTH(&buffer[8]) : 0;
uint16_t pos = 10;
uint16_t bytesLeft = sectionLength > 11 ? sectionLength - 11 : 0;
uint16_t loopLength = 0;
uint16_t bytesLeft2 = networkDescriptorsLength;
while ( bytesLeft >= bytesLeft2 && bytesLeft2 > 1 && bytesLeft2 >= (loopLength = 2 + buffer[pos+1])) {
descriptor(&buffer[pos], SCOPE_SI);
pos += loopLength;
bytesLeft -= loopLength;
bytesLeft2 -= loopLength;
}
if (!bytesLeft2 && bytesLeft > 1) {
bytesLeft2 = transportStreamLoopLength = DVB_LENGTH(&buffer[pos]);
bytesLeft -= 2;
pos += 2;
while (bytesLeft >= bytesLeft2 && bytesLeft2 > 4 && bytesLeft2 >= (loopLength = 6 + DVB_LENGTH(&buffer[pos+4]))) {
tsInfo.push_back(new TransportStreamInfo(&buffer[pos]));
bytesLeft -= loopLength;
bytesLeft2 -= loopLength;
pos += loopLength;
}
}
}
ApplicationInformation::ApplicationInformation(const uint8_t * const buffer)
{
applicationIdentifier = new ApplicationIdentifier(&buffer[0]);
applicationControlCode = buffer[6];
applicationDescriptorsLoopLength = DVB_LENGTH(&buffer[7]);
for (size_t i = 0; i < applicationDescriptorsLoopLength; i += buffer[i + 10] + 2)
descriptor(&buffer[i + 9], SCOPE_MHP);
}
TransportStreamInfo::TransportStreamInfo(const uint8_t * const buffer)
{
transportStreamId = UINT16(&buffer[0]);
originalNetworkId = UINT16(&buffer[2]);
transportDescriptorsLength = DVB_LENGTH(&buffer[4]);
for (size_t i = 6; i < transportDescriptorsLength + 6; i += buffer[i + 1] + 2)
descriptor(&buffer[i], SCOPE_SI);
}
ApplicationInformationSection::ApplicationInformationSection(const uint8_t * const buffer) : LongCrcSection(buffer),
commonDescriptorsLength(0),
applicationLoopLength(0)
{
unsigned int pos, length;
if (sectionLength < 13)
return;
commonDescriptorsLength = DVB_LENGTH(&buffer[8]);
if (sectionLength < 13 + commonDescriptorsLength)
return;
for (pos = 10; pos < 10 + commonDescriptorsLength; pos += length) {
if (pos + 2 > 10 + commonDescriptorsLength)
break;
length = buffer[pos + 1] + 2;
if (pos + length > 10 + commonDescriptorsLength)
break;
descriptor(&buffer[pos], SCOPE_MHP);
}
if (pos != 10 + commonDescriptorsLength)
return;
applicationLoopLength = DVB_LENGTH(&buffer[pos]);
if (sectionLength < 13 + commonDescriptorsLength + applicationLoopLength)
return;
for (pos += 2; pos < 12 + commonDescriptorsLength + applicationLoopLength; pos += length) {
if (pos + 9 > 12 + commonDescriptorsLength + applicationLoopLength)
break;
length = DVB_LENGTH(&buffer[pos + 7]) + 9;
if (pos + length > 12 + commonDescriptorsLength + applicationLoopLength)
break;
applicationInformation.push_back(new ApplicationInformation(&buffer[pos]));
}
}
ApplicationInformation::ApplicationInformation(const uint8_t * const buffer)
{
unsigned int length;
applicationIdentifier = new ApplicationIdentifier(&buffer[0]);
applicationControlCode = buffer[6];
applicationDescriptorsLoopLength = DVB_LENGTH(&buffer[7]);
for (size_t i = 0; i < applicationDescriptorsLoopLength; i += length) {
if (i + 2 > applicationDescriptorsLoopLength)
break;
length = buffer[i + 10] + 2;
if (i + length > applicationDescriptorsLoopLength)
break;
descriptor(&buffer[i + 9], SCOPE_MHP);
}
}
