66 lines
1.8 KiB
C++
66 lines
1.8 KiB
C++
#include "./ivfstream.h"
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#include "../mp4/mp4ids.h"
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#include "../exceptions.h"
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#include <c++utilities/conversion/stringbuilder.h>
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#include <c++utilities/conversion/stringconversion.h>
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#include <string>
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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::IvfStream
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* \brief Implementation of TagParser::AbstractTrack for ADTS streams.
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* \sa https://wiki.multimedia.cx/index.php/IVF
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*/
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void IvfStream::internalParseHeader(Diagnostics &diag)
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{
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static const string context("parsing IVF header");
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if (!m_istream) {
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throw NoDataFoundException();
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}
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// check signature and version
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if (m_reader.readUInt32BE() != 0x444B4946u) {
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diag.emplace_back(DiagLevel::Critical, "Signature not \"DKIF\".", context);
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throw InvalidDataException();
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}
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const auto version = m_reader.readUInt16LE();
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m_version = version;
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if (version != 0) {
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diag.emplace_back(DiagLevel::Warning, argsToString("Version ", version, " is not supported."), context);
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}
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// read remaining header
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m_headerLength = m_reader.readUInt16LE();
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const auto formatId = m_reader.readUInt32BE();
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m_formatId = interpretIntegerAsString(formatId);
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m_pixelSize.setWidth(m_reader.readUInt16LE());
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m_pixelSize.setHeight(m_reader.readUInt16LE());
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m_fps = m_reader.readUInt32LE();
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m_timeScale = m_reader.readUInt32LE();
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m_sampleCount = m_reader.readUInt32LE();
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// compute further values
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m_format = FourccIds::fourccToMediaFormat(formatId);
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m_duration = TimeSpan::fromSeconds(static_cast<double>(m_sampleCount) / m_fps);
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// skip unused bytes
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m_istream->seekg(4, ios_base::cur);
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}
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void IvfStream::readFrame(Diagnostics &diag)
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{
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m_frames.emplace_back();
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m_frames.back().parseHeader(m_reader, diag);
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}
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} // namespace TagParser
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