adtsstream.cpp

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#include "./adtsstream.h"
 
#include "../mp4/mp4ids.h"
 
#include "../exceptions.h"
 
#include <string>
 
using namespace std;
 
namespace TagParser {

 
void AdtsStream::internalParseHeader(Diagnostics &diag, AbortableProgressFeedback &progress)
{
    CPP_UTILITIES_UNUSED(diag)
    CPP_UTILITIES_UNUSED(progress)
 
    //static const string context("parsing ADTS frame header");
    if (!m_istream) {
        throw NoDataFoundException();
    }
    // parse frame header
    m_istream->seekg(static_cast<std::streamoff>(m_startOffset), ios_base::beg);
    m_firstFrame.parseHeader(m_reader);
    m_format = Mpeg4AudioObjectIds::idToMediaFormat(m_firstFrame.mpeg4AudioObjectId());
    m_channelCount = Mpeg4ChannelConfigs::channelCount(m_channelConfig = m_firstFrame.mpeg4ChannelConfig());
    std::uint8_t sampleRateIndex = m_firstFrame.mpeg4SamplingFrequencyIndex();
    m_samplingFrequency = sampleRateIndex < sizeof(mpeg4SamplingFrequencyTable) ? mpeg4SamplingFrequencyTable[sampleRateIndex] : 0;
}
 
} // namespace TagParser