41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
#include "./opusidentificationheader.h"
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#include "../ogg/oggiterator.h"
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#include "../exceptions.h"
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#include <c++utilities/conversion/binaryconversion.h>
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using namespace std;
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using namespace CppUtilities;
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namespace TagParser {
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/*!
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* \class TagParser::OpusIdentificationHeader
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* \brief The OpusIdentificationHeader class is an Opus identification header parser.
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* \sa https://wiki.xiph.org/OggOpus
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*/
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/*!
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* \brief Parses the Opus identification header which is read using the specified \a iterator.
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* \remarks The header is assumed to start at the current position of \a iterator.
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*/
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void OpusIdentificationHeader::parseHeader(OggIterator &iterator)
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{
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char buff[19 - 8];
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iterator.read(buff, 8);
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if (BE::toUInt64(buff) != 0x4F70757348656164u) {
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throw InvalidDataException(); // not Opus identification header
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}
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iterator.read(buff, sizeof(buff));
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m_version = static_cast<std::uint8_t>(*(buff));
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m_channels = static_cast<std::uint8_t>(*(buff + 1));
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m_preSkip = LE::toUInt16(buff + 2);
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m_sampleRate = LE::toUInt32(buff + 4);
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m_outputGain = LE::toUInt16(buff + 8);
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m_channelMap = static_cast<std::uint8_t>(*(buff + 10));
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}
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} // namespace TagParser
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