void CompositionOffsetBox::parseBox(BitStream& bitstr)
{
// First parse the box header
parseFullBoxHeader(bitstr);
const std::uint32_t entryCount = bitstr.read32Bits();
if (getVersion() == 0)
{
for (uint32_t i = 0; i < entryCount; ++i)
{
EntryVersion0 entryVersion0;
entryVersion0.mSampleCount = bitstr.read32Bits();
entryVersion0.mSampleOffset = bitstr.read32Bits();
mEntryVersion0.push_back(entryVersion0);
}
}
else if (getVersion() == 1)
{
for (uint32_t i = 0; i < entryCount; ++i)
{
EntryVersion1 entryVersion1;
entryVersion1.mSampleCount = bitstr.read32Bits();
entryVersion1.mSampleOffset = static_cast<std::int32_t>(bitstr.read32Bits());
mEntryVersion1.push_back(entryVersion1);
}
}
}
void CodingConstraintsBox::parseBox(BitStream& bitstr)
{
parseFullBoxHeader(bitstr);
mAllRefPicsIntra = bitstr.readBits(1);
mIntraPredUsed = bitstr.readBits(1);
mMaxRefPicUsed = bitstr.readBits(4);
bitstr.readBits(26); // discard reserved int(26)
}
void ItemReferenceBox::parseBox(BitStream& bitstr)
{
parseFullBoxHeader(bitstr);
while (bitstr.numBytesLeft() > 0)
{
SingleItemTypeReferenceBox singleRef;
singleRef.parseBox(bitstr);
addItemRef(singleRef);
}
}
void PrimaryItemBox::parseBox(BitStream& bitstr)
{
parseFullBoxHeader(bitstr);
if (getVersion() == 0)
{
mItemId = bitstr.read16Bits();
}
else
{
mItemId = bitstr.read32Bits();
}
}
void VideoMediaHeaderBox::parseBox(BitStream& bitstr)
{
BitStream subBitstr;
// First parse the box header
parseFullBoxHeader(bitstr);
bitstr.read16Bits(); // graphicsmode = 0
bitstr.read16Bits(); // opcolor = {0, 0, 0}
bitstr.read16Bits();
bitstr.read16Bits();
}
void MetaBox::parseBox(ISOBMFF::BitStream& bitstr)
{
parseFullBoxHeader(bitstr);
while (bitstr.numBytesLeft() > 0)
{
FourCCInt boxType;
BitStream subBitstr = bitstr.readSubBoxBitStream(boxType);
if (boxType == "hdlr")
{
mHandlerBox.parseBox(subBitstr);
}
else if (boxType == "pitm")
{
mPrimaryItemBox.parseBox(subBitstr);
}
else if (boxType == "iloc")
{
mItemLocationBox.parseBox(subBitstr);
}
else if (boxType == "iinf")
{
mItemInfoBox.parseBox(subBitstr);
}
else if (boxType == "iref")
{
mItemReferenceBox.parseBox(subBitstr);
}
else if (boxType == "iprp")
{
mItemPropertiesBox.parseBox(subBitstr);
}
else if (boxType == "grpl")
{
mGroupsListBox.parseBox(subBitstr);
}
else if (boxType == "dinf")
{
mDataInformationBox.parseBox(subBitstr);
}
else if (boxType == "idat")
{
mItemDataBox.parseBox(subBitstr);
}
else if (boxType == "ipro")
{
mItemProtectionBox.parseBox(subBitstr);
}
// unsupported boxes are skipped
}
}
void TrackHeaderBox::parseBox(ISOBMFF::BitStream& bitstr)
{
// First parse the box header
parseFullBoxHeader(bitstr);
if ((getVersion() != 0) && (getVersion() != 1))
{
throw RuntimeError("TrackHeaderBox::parseBox() supports only 'tkhd' version 0 and version 1");
}
if (getVersion() == 0)
{
mCreationTime = bitstr.read32Bits();
mModificationTime = bitstr.read32Bits();
}
else
{
mCreationTime = bitstr.read64Bits();
mModificationTime = bitstr.read64Bits();
}
mTrackID = bitstr.read32Bits();
bitstr.read32Bits();
if (getVersion() == 0)
{
mDuration = bitstr.read32Bits();
}
else
{
mDuration = bitstr.read64Bits();
}
bitstr.read32Bits(); // Reserved
bitstr.read32Bits();
bitstr.read16Bits(); // Layer
mAlternateGroup = bitstr.read16Bits(); // Alternate Group
mVolume = bitstr.read16Bits(); // Volume
bitstr.read16Bits(); // Reserved
mMatrix.clear();
for (int n = 9; n > 0; n--) // Matrix[9]
{
mMatrix.push_back(static_cast<int32_t>(bitstr.read32Bits()));
}
mWidth = bitstr.read32Bits();
mHeight = bitstr.read32Bits();
}
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 ImageSpatialExtentsProperty::parseBox(BitStream& input)
{
parseFullBoxHeader(input);
mImageWidth = input.read32Bits();
mImageHeight = input.read32Bits();
}