43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
#include "./vorbisidentificationheader.h"
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#include "./vorbispackagetypes.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::VorbisIdentificationHeader
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* \brief The VorbisIdentificationHeader class is a Vorbis identification header parser.
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*/
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/*!
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* \brief Parses the Vorbis 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 VorbisIdentificationHeader::parseHeader(OggIterator &iterator)
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{
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char buff[30 - 7];
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iterator.read(buff, 7);
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if ((BE::toUInt64(buff) & 0xffffffffffffff00u) != 0x01766F7262697300u) {
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throw InvalidDataException(); // not Vorbis identification header
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}
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iterator.read(buff, sizeof(buff));
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m_version = LE::toUInt32(buff);
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m_channels = static_cast<std::uint8_t>(*(buff + 4));
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m_sampleRate = LE::toUInt32(buff + 5);
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m_maxBitrate = LE::toUInt32(buff + 9);
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m_nominalBitrate = LE::toUInt32(buff + 13);
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m_minBitrate = LE::toUInt32(buff + 17);
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m_blockSize = static_cast<std::uint8_t>(*(buff + 21));
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m_framingFlag = static_cast<std::uint8_t>(*(buff + 22));
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}
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} // namespace TagParser
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