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#include "mediasamplevideobuffer.h"

MediaSampleVideoBuffer::MediaSampleVideoBuffer(IMediaSample *sample, int bytesPerLine)

    : QAbstractVideoBuffer(NoHandle)

    , m_sample(sample)

    , m_bytesPerLine(m_bytesPerLine)

    , m_mapMode(NotMapped)

{

    m_sample->AddRef();

}

MediaSampleVideoBuffer::~MediaSampleVideoBuffer()

{

    m_sample->Release();

}

uchar *MediaSampleVideoBuffer::map(MapMode mode, int *numBytes, int *bytesPerLine)

{

    if (m_mapMode == NotMapped && mode != NotMapped) {

        if (numBytes)

            *numBytes = m_sample->GetActualDataLength();

        if (bytesPerLine)

            *bytesPerLine = m_bytesPerLine;

        BYTE *bytes = 0;

        if (m_sample->GetPointer(&bytes) == S_OK) {

            m_mapMode = mode;

            return reinterpret_cast<uchar *>(bytes);

        }

    }

    return 0;

}

void MediaSampleVideoBuffer::unmap()

{

    m_mapMode = NotMapped;

}

QAbstractVideoBuffer::MapMode MediaSampleVideoBuffer::mapMode() const

{

    return m_mapMode;

}