void HevcSampleEntry::parseBox(BitStream& bitstr)
{
VisualSampleEntryBox::parseBox(bitstr);
while (bitstr.numBytesLeft() > 0)
{
// Extract contained box bitstream and type
std::string boxType;
BitStream subBitStream = bitstr.readSubBoxBitStream(boxType);
// Handle this box based on the type
if (boxType == "hvcC")
{
mHevcConfigurationBox.parseBox(subBitStream);
}
else if (boxType == "ccst")
{
mCodingConstraintsBox.parseBox(subBitStream);
mIsCodingConstraintsPresent = true;
}
else
{
logWarning() << "Skipping unknown box of type '" << boxType << "' inside HevcSampleEntry" << std::endl;
}
}
}
void ItemReferenceBox::parseBox(BitStream& bitstr)
{
parseFullBoxHeader(bitstr);
while (bitstr.numBytesLeft() > 0)
{
SingleItemTypeReferenceBox singleRef;
singleRef.parseBox(bitstr);
addItemRef(singleRef);
}
}
void ItemPropertiesBox::parseBox(BitStream& input)
{
parseBoxHeader(input);
std::string subBoxType;
BitStream subBitStream = input.readSubBoxBitStream(subBoxType);
mContainer.parseBox(subBitStream);
subBitStream = input.readSubBoxBitStream(subBoxType);
if (subBoxType != "ipma")
{
throw std::runtime_error("ItemPropertiesBox includes a box which is not ipma");
}
// There could be several ItemPropertyAssociation boxes, but currently only one is supported.
mAssociations.parseBox(subBitStream);
if (input.numBytesLeft() > 0)
{
logWarning() << "ItemPropertiesBox::parseBox() supports currently only one ipma box, but there seems to be more." << std::endl;
}
}
void ElementaryStreamDescriptorBox::parseBox(BitStream& bitstr)
{
parseFullBoxHeader(bitstr);
//////////////////////////////////////////////
// Fill in struct ES_Descriptor //
//////////////////////////////////////////////
mES_Descriptor.ES_DescrTag = bitstr.read8Bits();
if (mES_Descriptor.ES_DescrTag != 3) // ES_DescrTag
{
throw RuntimeError("ElementaryStreamDescritorBox ES_Descriptor.ES_DescrTag not valid");
}
/* Expandable class... need to find out size based on (from ISO/IEC 14496-1)
* int sizeOfInstance = 0;
* bit(1) nextByte;
* bit(7) sizeOfInstance;
* while(nextByte) {
* bit(1) nextByte;
* bit(7) sizeByte;
* sizeOfInstance = sizeOfInstance<<7 | sizeByte; }
*/
std::uint8_t readByte = 0;
std::uint32_t size = 0;
do
{
readByte = bitstr.read8Bits();
std::uint8_t sizeByte = (readByte & 0x7F);
size = (size << 7) | sizeByte;
} while (readByte & 0x80);
mES_Descriptor.size = size;
mES_Descriptor.ES_ID = bitstr.read16Bits();
mES_Descriptor.flags = bitstr.read8Bits();
if (mES_Descriptor.flags & 0x80) // streamDependenceFlag as defined in 7.2.6.5.1 of ISO/IEC 14486-1:2010(E)
{
mES_Descriptor.dependsOn_ES_ID = bitstr.read16Bits();
}
if (mES_Descriptor.flags & 0x40) // URL_Flag as defined in 7.2.6.5.1 of ISO/IEC 14486-1:2010(E)
{
mES_Descriptor.URLlength = bitstr.read8Bits();
if (mES_Descriptor.URLlength)
{
bitstr.readStringWithLen(mES_Descriptor.URLstring, mES_Descriptor.URLlength);
}
}
if (mES_Descriptor.flags & 0x20) // OCRstreamFlag as defined in 7.2.6.5.1 of ISO/IEC 14486-1:2010(E)
{
mES_Descriptor.OCR_ES_Id = bitstr.read16Bits();
}
//////////////////////////////////////////////////////////////////
// Fill in struct ES_Descriptor.DecoderConfigDescriptor //
//////////////////////////////////////////////////////////////////
mES_Descriptor.decConfigDescr.DecoderConfigDescrTag = bitstr.read8Bits();
if (mES_Descriptor.decConfigDescr.DecoderConfigDescrTag != 4) // DecoderConfigDescrTag
{
throw RuntimeError("ElementaryStreamDescritorBox DecoderConfigDescriptor.DecoderConfigDescrTag not valid");
}
readByte = 0;
size = 0;
do
{
readByte = bitstr.read8Bits();
std::uint8_t sizeByte = (readByte & 0x7f);
size = (size << 7) | sizeByte;
} while (readByte & 0x80);
mES_Descriptor.decConfigDescr.size = size;
mES_Descriptor.decConfigDescr.objectTypeIndication = bitstr.read8Bits();
mES_Descriptor.decConfigDescr.streamType = (bitstr.read8Bits() >> 2);
mES_Descriptor.decConfigDescr.bufferSizeDB = bitstr.read24Bits();
mES_Descriptor.decConfigDescr.maxBitrate = bitstr.read32Bits();
mES_Descriptor.decConfigDescr.avgBitrate = bitstr.read32Bits();
/////////////////////////////////////////////////////////////////////////////////////
// Fill in struct ES_Descriptor.DecoderConfigDescriptor.DecoderSpecificInfo //
/////////////////////////////////////////////////////////////////////////////////////
while (bitstr.numBytesLeft()) // DecoderSpecificInfo is optional.
{
std::uint8_t tag = bitstr.read8Bits();
readByte = 0;
size = 0;
do
{
readByte = bitstr.read8Bits();
std::uint8_t sizeByte = (readByte & 0x7f);
size = (size << 7) | sizeByte;
} while (readByte & 0x80);
DecoderSpecificInfo decSpecificInfo;
decSpecificInfo.DecSpecificInfoTag = tag;
decSpecificInfo.size = size;
bitstr.read8BitsArray(decSpecificInfo.DecSpecificInfo, decSpecificInfo.size);
if (tag == 5) // DecSpecificInfoTag
{
mES_Descriptor.decConfigDescr.decSpecificInfo = std::move(decSpecificInfo);
}
else
{
mOtherDecSpecificInfo.push_back(std::move(decSpecificInfo));
}
}
}
void SampleTableBox::parseBox(BitStream& bitstr)
{
// First parse the box header
parseBoxHeader(bitstr);
// if there a data available in the file
while (bitstr.numBytesLeft() > 0)
{
// Extract contained box bitstream and type
std::string boxType;
BitStream subBitstr = bitstr.readSubBoxBitStream(boxType);
// Handle this box based on the type
if (boxType == "stsd")
{
mSampleDescriptionBox.parseBox(subBitstr);
}
else if (boxType == "stco" || boxType == "co64") // 'co64' is the 64-bit version
{
mChunkOffsetBox.parseBox(subBitstr);
}
else if (boxType == "stsz")
{
mSampleSizeBox.parseBox(subBitstr);
}
else if (boxType == "stts")
{
mTimeToSampleBox.parseBox(subBitstr);
}
else if (boxType == "stsc")
{
mSampleToChunkBox.parseBox(subBitstr);
}
else if (boxType == "stss")
{
mSyncSampleBox = std::make_shared<SyncSampleBox>();
mSyncSampleBox->parseBox(subBitstr);
}
else if (boxType == "sgpd")
{
auto sgdb = new SampleGroupDescriptionBox;
sgdb->parseBox(subBitstr);
mSampleGroupDescriptionBox.reset(sgdb);
}
else if (boxType == "sbgp")
{
SampleToGroupBox sampleToGroupBox;
sampleToGroupBox.parseBox(subBitstr);
mSampleToGroupBox.push_back(move(sampleToGroupBox));
}
else if (boxType == "cslg")
{
mCompositionToDecodeBox = std::make_shared<CompositionToDecodeBox>();
mCompositionToDecodeBox->parseBox(subBitstr);
}
else if (boxType == "ctts")
{
mCompositionOffsetBox = std::make_shared<CompositionOffsetBox>();
mCompositionOffsetBox->parseBox(subBitstr);
}
else
{
logWarning() << "Skipping unknown box of type '" << boxType << "' inside SampleTableBox" << endl;
}
}
// We need to update stsc decoded presentation of chunk entries.
mSampleToChunkBox.decodeEntries(mChunkOffsetBox.getChunkOffsets().size());
}
