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Diffstat (limited to 'src/multimedia/video/qvideoframe.cpp')
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diff --git a/src/multimedia/video/qvideoframe.cpp b/src/multimedia/video/qvideoframe.cpp new file mode 100644 index 0000000..2d66d9e --- /dev/null +++ b/src/multimedia/video/qvideoframe.cpp @@ -0,0 +1,741 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtMultimedia module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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. + \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). + + \value Format_IMC1 + The frame is stored using an 8-bit per component planar YUV format with the U and V planes + horizontally and vertically sub-sampled. This is similar to the Format_YUV420P type, except + that the bytes per line of the U and V planes are padded out to the same stride as the Y plane. + + \value Format_IMC2 + The frame is stored using an 8-bit per component planar YUV format with the U and V planes + horizontally and vertically sub-sampled. This is similar to the Format_YUV420P type, except + that the lines of the U and V planes are interleaved, i.e. each line of U data is followed by a + line of V data creating a single line of the same stride as the Y data. + + \value Format_IMC3 + The frame is stored using an 8-bit per component planar YVU format with the V and U planes + horizontally and vertically sub-sampled. This is similar to the Format_YV12 type, except that + the bytes per line of the V and U planes are padded out to the same stride as the Y plane. + + \value Format_IMC4 + The frame is stored using an 8-bit per component planar YVU format with the V and U planes + horizontally and vertically sub-sampled. This is similar to the Format_YV12 type, except that + the lines of the V and U planes are interleaved, i.e. each line of V data is followed by a line + of U data creating a single line of the same stride as the Y data. + + \value Format_Y8 + The frame is stored using an 8-bit greyscale format. + + \value Format_Y16 + The frame is stored using a 16-bit linear greyscale format. Little endian. + + \value Format_User + Start value for user defined pixel formats. +*/ + +/*! + \enum QVideoFrame::FieldType + + Specifies the field an interlaced video frame belongs to. + + \value ProgressiveFrame The frame is not interlaced. + \value TopField The frame contains a top field. + \value BottomField The frame contains a bottom field. + \value InterlacedFrame The frame contains a merged top and bottom field. +*/ + +/*! + Constructs a null video frame. +*/ + +QVideoFrame::QVideoFrame() + : d(new QVideoFramePrivate) +{ +} + +/*! + Constructs a video frame from a \a buffer of the given pixel \a format and \a size in pixels. + + \note This doesn't increment the reference count of the video buffer. +*/ + +QVideoFrame::QVideoFrame( + QAbstractVideoBuffer *buffer, const QSize &size, PixelFormat format) + : d(new QVideoFramePrivate(size, format)) +{ + d->buffer = buffer; +} + +/*! + Constructs a video frame of the given pixel \a format and \a size in pixels. + + The \a bytesPerLine (stride) is the length of each scan line in bytes, and \a bytes is the total + number of bytes that must be allocated for the frame. +*/ + +QVideoFrame::QVideoFrame(int bytes, const QSize &size, int bytesPerLine, PixelFormat format) + : d(new QVideoFramePrivate(size, format)) +{ + if (bytes > 0) { + QByteArray data; + data.resize(bytes); + + // Check the memory was successfully allocated. + if (!data.isEmpty()) + d->buffer = new QMemoryVideoBuffer(data, bytesPerLine); + } +} + +/*! + Constructs a video frame from an \a image. + + \note This will construct an invalid video frame if there is no frame type equivalent to the + image format. + + \sa pixelFormatFromImageFormat() +*/ + +QVideoFrame::QVideoFrame(const QImage &image) + : d(new QVideoFramePrivate( + image.size(), pixelFormatFromImageFormat(image.format()))) +{ + if (d->pixelFormat != Format_Invalid) + d->buffer = new QImageVideoBuffer(image); +} + +/*! + Constructs a copy of \a other. +*/ + +QVideoFrame::QVideoFrame(const QVideoFrame &other) + : d(other.d) +{ +} + +/*! + Assigns the contents of \a other to a video frame. +*/ + +QVideoFrame &QVideoFrame::operator =(const QVideoFrame &other) +{ + d = other.d; + + return *this; +} + +/*! + Destroys a video frame. +*/ + +QVideoFrame::~QVideoFrame() +{ +} + +/*! + Identifies whether a video frame is valid. + + An invalid frame has no video buffer associated with it. + + Returns true if the frame is valid, and false if it is not. +*/ + +bool QVideoFrame::isValid() const +{ + return d->buffer != 0; +} + +/*! + Returns the color format of a video frame. +*/ + +QVideoFrame::PixelFormat QVideoFrame::pixelFormat() const +{ + return d->pixelFormat; +} + +/*! + Returns the type of a video frame's handle. +*/ + +QAbstractVideoBuffer::HandleType QVideoFrame::handleType() const +{ + return d->buffer ? d->buffer->handleType() : QAbstractVideoBuffer::NoHandle; +} + +/*! + Returns the size of a video frame. +*/ + +QSize QVideoFrame::size() const +{ + return d->size; +} + +/*! + Returns the width of a video frame. +*/ + +int QVideoFrame::width() const +{ + return d->size.width(); +} + +/*! + Returns the height of a video frame. +*/ + +int QVideoFrame::height() const +{ + return d->size.height(); +} + +/*! + Returns the field an interlaced video frame belongs to. + + If the video is not interlaced this will return WholeFrame. +*/ + +QVideoFrame::FieldType QVideoFrame::fieldType() const +{ + return d->fieldType; +} + +/*! + Sets the \a field an interlaced video frame belongs to. +*/ + +void QVideoFrame::setFieldType(QVideoFrame::FieldType field) +{ + d->fieldType = field; +} + +/*! + Identifies if a video frame's contents are currently mapped to system memory. + + This is a convenience function which checks that the \l {QAbstractVideoBuffer::MapMode}{MapMode} + of the frame is not equal to QAbstractVideoBuffer::NotMapped. + + Returns true if the contents of the video frame are mapped to system memory, and false + otherwise. + + \sa mapMode() QAbstractVideoBuffer::MapMode +*/ + +bool QVideoFrame::isMapped() const +{ + return d->buffer != 0 && d->buffer->mapMode() != QAbstractVideoBuffer::NotMapped; +} + +/*! + Identifies if the mapped contents of a video frame will be persisted when the frame is unmapped. + + This is a convenience function which checks if the \l {QAbstractVideoBuffer::MapMode}{MapMode} + contains the QAbstractVideoBuffer::WriteOnly flag. + + Returns true if the video frame will be updated when unmapped, and false otherwise. + + \note The result of altering the data of a frame that is mapped in read-only mode is undefined. + Depending on the buffer implementation the changes may be persisted, or worse alter a shared + buffer. + + \sa mapMode(), QAbstractVideoBuffer::MapMode +*/ + +bool QVideoFrame::isWritable() const +{ + return d->buffer != 0 && (d->buffer->mapMode() & QAbstractVideoBuffer::WriteOnly); +} + +/*! + Identifies if the mapped contents of a video frame were read from the frame when it was mapped. + + This is a convenience function which checks if the \l {QAbstractVideoBuffer::MapMode}{MapMode} + contains the QAbstractVideoBuffer::WriteOnly flag. + + Returns true if the contents of the mapped memory were read from the video frame, and false + otherwise. + + \sa mapMode(), QAbstractVideoBuffer::MapMode +*/ + +bool QVideoFrame::isReadable() const +{ + return d->buffer != 0 && (d->buffer->mapMode() & QAbstractVideoBuffer::ReadOnly); +} + +/*! + Returns the mode a video frame was mapped to system memory in. + + \sa map(), QAbstractVideoBuffer::MapMode +*/ + +QAbstractVideoBuffer::MapMode QVideoFrame::mapMode() const +{ + return d->buffer != 0 ? d->buffer->mapMode() : QAbstractVideoBuffer::NotMapped; +} + +/*! + Maps the contents of a video frame to memory. + + The map \a mode indicates whether the contents of the mapped memory should be read from and/or + written to the frame. If the map mode includes the QAbstractVideoBuffer::ReadOnly flag the + mapped memory will be populated with the content of the video frame when mapped. If the map + mode inclues the QAbstractVideoBuffer::WriteOnly flag the content of the mapped memory will be + persisted in the frame when unmapped. + + While mapped the contents of a video frame can be accessed directly through the pointer returned + by the bits() function. + + When access to the data is no longer needed be sure to call the unmap() function to release the + mapped memory. + + Returns true if the buffer was mapped to memory in the given \a mode and false otherwise. + + \sa unmap(), mapMode(), bits() +*/ + +bool QVideoFrame::map(QAbstractVideoBuffer::MapMode mode) +{ + if (d->buffer != 0 && d->data == 0) { + Q_ASSERT(d->bytesPerLine == 0); + Q_ASSERT(d->mappedBytes == 0); + + d->data = d->buffer->map(mode, &d->mappedBytes, &d->bytesPerLine); + + return d->data != 0; + } + + return false; +} + +/*! + Releases the memory mapped by the map() function. + + If the \l {QAbstractVideoBuffer::MapMode}{MapMode} included the QAbstractVideoBuffer::WriteOnly + flag this will persist the current content of the mapped memory to the video frame. + + \sa map() +*/ + +void QVideoFrame::unmap() +{ + if (d->data != 0) { + d->mappedBytes = 0; + d->bytesPerLine = 0; + d->data = 0; + + d->buffer->unmap(); + } +} + +/*! + Returns the number of bytes in a scan line. + + \note This is the bytes per line of the first plane only. The bytes per line of subsequent + planes should be calculated as per the frame type. + + This value is only valid while the frame data is \l {map()}{mapped}. + + \sa bits(), map(), mappedBytes() +*/ + +int QVideoFrame::bytesPerLine() const +{ + return d->bytesPerLine; +} + +/*! + Returns a pointer to the start of the frame data buffer. + + This value is only valid while the frame data is \l {map()}{mapped}. + + \sa map(), mappedBytes(), bytesPerLine() +*/ + +uchar *QVideoFrame::bits() +{ + return d->data; +} + +/*! + Returns a pointer to the start of the frame data buffer. + + This value is only valid while the frame data is \l {map()}{mapped}. + + \sa map(), mappedBytes(), bytesPerLine() +*/ + +const uchar *QVideoFrame::bits() const +{ + return d->data; +} + +/*! + Returns the number of bytes occupied by the mapped frame data. + + This value is only valid while the frame data is \l {map()}{mapped}. + + \sa map() +*/ + +int QVideoFrame::mappedBytes() const +{ + return d->mappedBytes; +} + +/*! + Returns a type specific handle to a video frame's buffer. + + For an OpenGL texture this would be the texture ID. + + \sa QAbstractVideoBuffer::handle() +*/ + +QVariant QVideoFrame::handle() const +{ + return d->buffer != 0 ? d->buffer->handle() : QVariant(); +} + +/*! + Returns the presentation time when the frame should be displayed. +*/ + +qint64 QVideoFrame::startTime() const +{ + return d->startTime; +} + +/*! + Sets the presentation \a time when the frame should be displayed. +*/ + +void QVideoFrame::setStartTime(qint64 time) +{ + d->startTime = time; +} + +/*! + Returns the presentation time when a frame should stop being displayed. +*/ + +qint64 QVideoFrame::endTime() const +{ + return d->endTime; +} + +/*! + Sets the presentation \a time when a frame should stop being displayed. +*/ + +void QVideoFrame::setEndTime(qint64 time) +{ + d->endTime = time; +} + +/*! + Returns an video pixel format equivalent to an image \a format. If there is no equivalent + format QVideoFrame::InvalidType is returned instead. +*/ + +QVideoFrame::PixelFormat QVideoFrame::pixelFormatFromImageFormat(QImage::Format format) +{ + switch (format) { + case QImage::Format_Invalid: + case QImage::Format_Mono: + case QImage::Format_MonoLSB: + case QImage::Format_Indexed8: + return Format_Invalid; + case QImage::Format_RGB32: + return Format_RGB32; + case QImage::Format_ARGB32: + return Format_ARGB32; + case QImage::Format_ARGB32_Premultiplied: + return Format_ARGB32_Premultiplied; + case QImage::Format_RGB16: + return Format_RGB565; + case QImage::Format_ARGB8565_Premultiplied: + case QImage::Format_RGB666: + case QImage::Format_ARGB6666_Premultiplied: + return Format_Invalid; + case QImage::Format_RGB555: + return Format_RGB555; + case QImage::Format_ARGB8555_Premultiplied: + return Format_Invalid; + case QImage::Format_RGB888: + return Format_RGB24; + case QImage::Format_RGB444: + case QImage::Format_ARGB4444_Premultiplied: + return Format_Invalid; + case QImage::NImageFormats: + return Format_Invalid; + } + return Format_Invalid; +} + +/*! + Returns an image format equivalent to a video frame pixel \a format. If there is no equivalent + format QImage::Format_Invalid is returned instead. +*/ + +QImage::Format QVideoFrame::imageFormatFromPixelFormat(PixelFormat format) +{ + switch (format) { + case Format_Invalid: + return QImage::Format_Invalid; + case Format_ARGB32: + return QImage::Format_ARGB32; + case Format_ARGB32_Premultiplied: + return QImage::Format_ARGB32_Premultiplied; + case Format_RGB32: + return QImage::Format_RGB32; + case Format_RGB24: + return QImage::Format_RGB888; + case Format_RGB565: + return QImage::Format_RGB16; + case Format_RGB555: + return QImage::Format_RGB555; + case Format_ARGB8565_Premultiplied: + return QImage::Format_ARGB8565_Premultiplied; + case Format_BGRA32: + case Format_BGRA32_Premultiplied: + case Format_BGR32: + case Format_BGR24: + return QImage::Format_Invalid; + case Format_BGR565: + case Format_BGR555: + case Format_BGRA5658_Premultiplied: + case Format_AYUV444: + case Format_AYUV444_Premultiplied: + case Format_YUV444: + case Format_YUV420P: + case Format_YV12: + case Format_UYVY: + case Format_YUYV: + case Format_NV12: + case Format_NV21: + case Format_IMC1: + case Format_IMC2: + case Format_IMC3: + case Format_IMC4: + case Format_Y8: + case Format_Y16: + return QImage::Format_Invalid; + case Format_User: + return QImage::Format_Invalid; + } + return QImage::Format_Invalid; +} + +QT_END_NAMESPACE + |