source: trunk/src/multimedia/video/qvideoframe.cpp@ 599

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#include "qvideoframe.h"

#include <private/qimagevideobuffer_p.h>
#include <private/qmemoryvideobuffer_p.h>

#include <qimage.h>
#include <qpair.h>
#include <qsize.h>
#include <qvariant.h>
#include <qvector.h>

QT_BEGIN_NAMESPACE

class QVideoFramePrivate : public QSharedData
{
public:
    QVideoFramePrivate()
        : startTime(-1)
        , endTime(-1)
        , data(0)
        , mappedBytes(0)
        , bytesPerLine(0)
        , pixelFormat(QVideoFrame::Format_Invalid)
        , fieldType(QVideoFrame::ProgressiveFrame)
        , buffer(0)
    {
    }

    QVideoFramePrivate(const QSize &size, QVideoFrame::PixelFormat format)
        : size(size)
        , startTime(-1)
        , endTime(-1)
        , data(0)
        , mappedBytes(0)
        , bytesPerLine(0)
        , pixelFormat(format)
        , fieldType(QVideoFrame::ProgressiveFrame)
        , buffer(0)
    {
    }

    ~QVideoFramePrivate()
    {
        delete buffer;
    }

    QSize size;
    qint64 startTime;
    qint64 endTime;
    uchar *data;
    int mappedBytes;
    int bytesPerLine;
    QVideoFrame::PixelFormat pixelFormat;
    QVideoFrame::FieldType fieldType;
    QAbstractVideoBuffer *buffer;

private:
    Q_DISABLE_COPY(QVideoFramePrivate)
};

/*!
    \class QVideoFrame
    \brief The QVideoFrame class provides a representation of a frame of video data.
    \preliminary
    \since 4.6

    A QVideoFrame encapsulates the data of a video frame, and information about the frame.

    The contents of a video frame can be mapped to memory using the map() function.  While
    mapped the video data can accessed using the bits() function which returns a pointer to a
    buffer, the total size of which is given by the mappedBytes(), and the size of each line is given
    by bytesPerLine().  The return value of the handle() function may be used to access frame data
    using the internal buffer's native APIs.

    The video data in a QVideoFrame is encapsulated in a QAbstractVideoBuffer.  A QVideoFrame
    may be constructed from any buffer type by subclassing the QAbstractVideoBuffer class.

    \note QVideoFrame is explicitly shared, any change made to video frame will also apply to any
    copies.
*/

/*!
    \enum QVideoFrame::PixelFormat

    Enumerates video data types.

    \value Format_Invalid
    The frame is invalid. 
 
    \value Format_ARGB32
    The frame is stored using a 32-bit ARGB format (0xAARRGGBB).  This is equivalent to
    QImage::Format_ARGB32.
 
    \value Format_ARGB32_Premultiplied
    The frame stored using a premultiplied 32-bit ARGB format (0xAARRGGBB).  This is equivalent
    to QImage::Format_ARGB32_Premultiplied.
 
    \value Format_RGB32
    The frame stored using a 32-bit RGB format (0xffRRGGBB).  This is equivalent to
    QImage::Format_RGB32
 
    \value Format_RGB24
    The frame is stored using a 24-bit RGB format (8-8-8).  This is equivalent to
    QImage::Format_RGB888
 
    \value Format_RGB565
    The frame is stored using a 16-bit RGB format (5-6-5).  This is equivalent to
    QImage::Format_RGB16.
 
    \value Format_RGB555
    The frame is stored using a 16-bit RGB format (5-5-5).  This is equivalent to
    QImage::Format_RGB555.
 
    \value Format_ARGB8565_Premultiplied
    The frame is stored using a 24-bit premultiplied ARGB format (8-6-6-5).
 
    \value Format_BGRA32
    The frame is stored using a 32-bit ARGB format (0xBBGGRRAA).
 
    \value Format_BGRA32_Premultiplied
    The frame is stored using a premultiplied 32bit BGRA format.
 
    \value Format_BGR32
    The frame is stored using a 32-bit BGR format (0xBBGGRRff).
 
    \value Format_BGR24
    The frame is stored using a 24-bit BGR format (0xBBGGRR).
 
    \value Format_BGR565
    The frame is stored using a 16-bit BGR format (5-6-5).
 
    \value Format_BGR555
    The frame is stored using a 16-bit BGR format (5-5-5).
 
    \value Format_BGRA5658_Premultiplied
    The frame is stored using a 24-bit premultiplied BGRA format (5-6-5-8).
 
    \value Format_AYUV444
    The frame is stored using a packed 32-bit AYUV format (0xAAYYUUVV).
 
    \value Format_AYUV444_Premultiplied
    The frame is stored using a packed premultiplied 32-bit AYUV format (0xAAYYUUVV).

    \value Format_YUV444
    The frame is stored using a 24-bit packed YUV format (8-8-8).
 
    \value Format_YUV420P
    The frame is stored using an 8-bit per component planar YUV format with the U and V planes
    horizontally and vertically sub-sampled, i.e. the height and width of the U and V planes are
    half that of the Y plane.
 
    \value Format_YV12
    The frame is stored using an 8-bit per component planar YVU format with the V and U planes
    horizontally and vertically sub-sampled, i.e. the height and width of the V and U planes are
    half that of the Y plane.
 
    \value Format_UYVY
    The frame is stored using an 8-bit per component packed YUV format with the U and V planes
    horizontally sub-sampled (U-Y-V-Y), i.e. two horizontally adjacent pixels are stored as a 32-bit
    macropixel which has a Y value for each pixel and common U and V values.
 
    \value Format_YUYV
    The frame is stored using an 8-bit per component packed YUV format with the U and V planes
    horizontally sub-sampled (Y-U-Y-V), i.e. two horizontally adjacent pixels are stored as a 32-bit
    macropixel which has a Y value for each pixel and common U and V values.
 
    \value Format_NV12
    The frame is stored using an 8-bit per component semi-planar YUV format with a Y plane (Y)
    followed by a horizontally and vertically sub-sampled, packed UV plane (U-V).
 
    \value Format_NV21
    The frame is stored using an 8-bit per component semi-planar YUV format with a Y plane (Y)
    followed by a horizontally and vertically sub-sampled, packed VU plane (V-U).