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#include <QtCore/qvariant.h>

#include <QtCore/qdebug.h>

#include <QtGui/qx11info_x11.h>

#include <QtMultimedia/qvideosurfaceformat.h>

#include "qx11videosurface.h"

Q_DECLARE_METATYPE(XvImage*);

static QAbstractVideoBuffer::HandleType XvHandleType = QAbstractVideoBuffer::HandleType(4);

struct XvFormatRgb

{

    QVideoFrame::PixelFormat pixelFormat;

    int bits_per_pixel;

    int format;

    int num_planes;

    int depth;

    unsigned int red_mask;

    unsigned int green_mask;

    unsigned int blue_mask;

};

bool operator ==(const XvImageFormatValues &format, const XvFormatRgb &rgb)

{

    return format.type == XvRGB

            && format.bits_per_pixel == rgb.bits_per_pixel

            && format.format         == rgb.format

            && format.num_planes     == rgb.num_planes

            && format.depth          == rgb.depth

            && format.red_mask       == rgb.red_mask

            && format.blue_mask      == rgb.blue_mask;

}

static const XvFormatRgb qt_xvRgbLookup[] =

{

    { QVideoFrame::Format_ARGB32, 32, XvPacked, 1, 32, 0x00FF0000, 0x0000FF00, 0x000000FF },

    { QVideoFrame::Format_RGB32 , 32, XvPacked, 1, 24, 0x00FF0000, 0x0000FF00, 0x000000FF },

    { QVideoFrame::Format_RGB24 , 24, XvPacked, 1, 24, 0x00FF0000, 0x0000FF00, 0x000000FF },

    { QVideoFrame::Format_RGB565, 16, XvPacked, 1, 16, 0x0000F800, 0x000007E0, 0x0000001F },

    { QVideoFrame::Format_BGRA32, 32, XvPacked, 1, 32, 0xFF000000, 0x00FF0000, 0x0000FF00 },

    { QVideoFrame::Format_BGR32 , 32, XvPacked, 1, 24, 0x00FF0000, 0x0000FF00, 0x000000FF },

    { QVideoFrame::Format_BGR24 , 24, XvPacked, 1, 24, 0x00FF0000, 0x0000FF00, 0x000000FF },

    { QVideoFrame::Format_BGR565, 16, XvPacked, 1, 16, 0x0000F800, 0x000007E0, 0x0000001F }

};

struct XvFormatYuv

{

    QVideoFrame::PixelFormat pixelFormat;

    int bits_per_pixel;

    int format;

    int num_planes;

    unsigned int y_sample_bits;

    unsigned int u_sample_bits;

    unsigned int v_sample_bits;

    unsigned int horz_y_period;

    unsigned int horz_u_period;

    unsigned int horz_v_period;

    unsigned int vert_y_period;

    unsigned int vert_u_period;

    unsigned int vert_v_period;

    char component_order[32];

};

bool operator ==(const XvImageFormatValues &format, const XvFormatYuv &yuv)

{

    return format.type == XvYUV

            && format.bits_per_pixel == yuv.bits_per_pixel

            && format.format         == yuv.format

            && format.num_planes     == yuv.num_planes

            && format.y_sample_bits  == yuv.y_sample_bits

            && format.u_sample_bits  == yuv.u_sample_bits

            && format.v_sample_bits  == yuv.v_sample_bits

            && format.horz_y_period  == yuv.horz_y_period

            && format.horz_u_period  == yuv.horz_u_period

            && format.horz_v_period  == yuv.horz_v_period

            && format.horz_y_period  == yuv.vert_y_period

            && format.vert_u_period  == yuv.vert_u_period

            && format.vert_v_period  == yuv.vert_v_period

            && qstrncmp(format.component_order, yuv.component_order, 32) == 0;

}

static const XvFormatYuv qt_xvYuvLookup[] =

{

    { QVideoFrame::Format_YUV444 , 24, XvPacked, 1, 8, 8, 8, 1, 1, 1, 1, 1, 1, "YUV"  },

    { QVideoFrame::Format_YUV420P, 12, XvPlanar, 3, 8, 8, 8, 1, 2, 2, 1, 2, 2, "YUV"  },

    { QVideoFrame::Format_YV12   , 12, XvPlanar, 3, 8, 8, 8, 1, 2, 2, 1, 2, 2, "YVU"  },

    { QVideoFrame::Format_UYVY   , 16, XvPacked, 1, 8, 8, 8, 1, 2, 2, 1, 1, 1, "UYVY" },

    { QVideoFrame::Format_YUYV   , 16, XvPacked, 1, 8, 8, 8, 1, 2, 2, 1, 1, 1, "YUY2" },

    { QVideoFrame::Format_YUYV   , 16, XvPacked, 1, 8, 8, 8, 1, 2, 2, 1, 1, 1, "YUYV" },

    { QVideoFrame::Format_NV12   , 12, XvPlanar, 2, 8, 8, 8, 1, 2, 2, 1, 2, 2, "YUV"  },

    { QVideoFrame::Format_NV12   , 12, XvPlanar, 2, 8, 8, 8, 1, 2, 2, 1, 2, 2, "YVU"  },

    { QVideoFrame::Format_Y8     , 8 , XvPlanar, 1, 8, 0, 0, 1, 0, 0, 1, 0, 0, "Y"    }

};

QX11VideoSurface::QX11VideoSurface(QObject *parent)

    : QAbstractVideoSurface(parent)

    , m_winId(0)

    , m_portId(0)

    , m_gc(0)

    , m_image(0)

{

}

QX11VideoSurface::~QX11VideoSurface()

{

    if (m_gc)

        XFreeGC(QX11Info::display(), m_gc);

    if (m_portId != 0)

        XvUngrabPort(QX11Info::display(), m_portId, 0);

}

WId QX11VideoSurface::winId() const

{

    return m_winId;

}

void QX11VideoSurface::setWinId(WId id)

{

    if (id == m_winId)

        return;

    if (m_image)

        XFree(m_image);

    if (m_gc) {

        XFreeGC(QX11Info::display(), m_gc);

        m_gc = 0;

    }

    if (m_portId != 0)

        XvUngrabPort(QX11Info::display(), m_portId, 0);

    m_supportedPixelFormats.clear();

    m_formatIds.clear();

    m_winId = id;

    if (m_winId && findPort()) {

        querySupportedFormats();

        m_gc = XCreateGC(QX11Info::display(), m_winId, 0, 0);

        if (m_image) {

            m_image = 0;

                QAbstractVideoSurface::stop();

        }

    }

    emit supportedFormatsChanged();

}

QRect QX11VideoSurface::displayRect() const

{

    return m_displayRect;

}

void QX11VideoSurface::setDisplayRect(const QRect &rect)

{

    m_displayRect = rect;

}

int QX11VideoSurface::brightness() const

{

    return getAttribute("XV_BRIGHTNESS", m_brightnessRange.first, m_brightnessRange.second);

}

void QX11VideoSurface::setBrightness(int brightness)

{

    setAttribute("XV_BRIGHTNESS", brightness, m_brightnessRange.first, m_brightnessRange.second);

}

int QX11VideoSurface::contrast() const

{

    return getAttribute("XV_CONTRAST", m_contrastRange.first, m_contrastRange.second);

}

void QX11VideoSurface::setContrast(int contrast)

{

    setAttribute("XV_CONTRAST", contrast, m_contrastRange.first, m_contrastRange.second);

}

int QX11VideoSurface::hue() const

{

    return getAttribute("XV_HUE", m_hueRange.first, m_hueRange.second);

}

void QX11VideoSurface::setHue(int hue)

{

    setAttribute("XV_HUE", hue, m_hueRange.first, m_hueRange.second);

}

int QX11VideoSurface::saturation() const

{

    return getAttribute("XV_SATURATION", m_saturationRange.first, m_saturationRange.second);

}

void QX11VideoSurface::setSaturation(int saturation)

{

    setAttribute("XV_SATURATION", saturation, m_saturationRange.first, m_saturationRange.second);

}

int QX11VideoSurface::getAttribute(const char *attribute, int minimum, int maximum) const

{

    if (m_portId != 0) {

        Display *display = QX11Info::display();

        Atom atom = XInternAtom(display, attribute, True);

        int value = 0;

        XvGetPortAttribute(display, m_portId, atom, &value);

        return redistribute(value, minimum, maximum, -100, 100);

    } else {

        return 0;

    }

}

void QX11VideoSurface::setAttribute(const char *attribute, int value, int minimum, int maximum)

{

    if (m_portId != 0) {

        Display *display = QX11Info::display();

        Atom atom = XInternAtom(display, attribute, True);

        XvSetPortAttribute(

                display, m_portId, atom, redistribute(value, -100, 100, minimum, maximum));

    }

}

int QX11VideoSurface::redistribute(

        int value, int fromLower, int fromUpper, int toLower, int toUpper)

{

    return fromUpper != fromLower

            ? ((value - fromLower) * (toUpper - toLower) / (fromUpper - fromLower)) + toLower

            : 0;

}

QList<QVideoFrame::PixelFormat> QX11VideoSurface::supportedPixelFormats(

        QAbstractVideoBuffer::HandleType handleType) const

{

    return handleType == QAbstractVideoBuffer::NoHandle || handleType ==  XvHandleType

            ? m_supportedPixelFormats

            : QList<QVideoFrame::PixelFormat>();

}

bool QX11VideoSurface::start(const QVideoSurfaceFormat &format)

{

    if (m_image)

        XFree(m_image);

    int xvFormatId = 0;

    for (int i = 0; i < m_supportedPixelFormats.count(); ++i) {

        if (m_supportedPixelFormats.at(i) == format.pixelFormat()) {

            xvFormatId = m_formatIds.at(i);

            break;

        }

    }

    if (xvFormatId == 0) {

        setError(UnsupportedFormatError);

    } else {

        XvImage *image = XvCreateImage(

                QX11Info::display(),

                m_portId,

                xvFormatId,

                0,

                format.frameWidth(),

                format.frameHeight());

        if (!image) {

            setError(ResourceError);

        } else {

            m_viewport = format.viewport();

            m_image = image;

            QVideoSurfaceFormat newFormat = format;

            newFormat.setProperty("portId", QVariant(quint64(m_portId)));

            newFormat.setProperty("xvFormatId", xvFormatId);

            newFormat.setProperty("dataSize", image->data_size);

            return QAbstractVideoSurface::start(newFormat);

        }

    }

    if (m_image) {

        m_image = 0;

        QAbstractVideoSurface::stop();

    }

    return false;

}

void QX11VideoSurface::stop()

{

    if (m_image) {

        XFree(m_image);

        m_image = 0;

        QAbstractVideoSurface::stop();

    }

}

bool QX11VideoSurface::present(const QVideoFrame &frame)

{

    if (!m_image) {

        setError(StoppedError);

        return false;

    } else if (m_image->width != frame.width() || m_image->height != frame.height()) {

        setError(IncorrectFormatError);

        return false;

    } else {

        QVideoFrame frameCopy(frame);

        if (!frameCopy.map(QAbstractVideoBuffer::ReadOnly)) {

            setError(IncorrectFormatError);

            return false;

        } else {

            bool presented = false;

            if (frame.handleType() != XvHandleType &&

                m_image->data_size > frame.mappedBytes()) {

                qWarning("Insufficient frame buffer size");

                setError(IncorrectFormatError);

            } else if (frame.handleType() != XvHandleType &&

                       m_image->num_planes > 0 &&

                       m_image->pitches[0] != frame.bytesPerLine()) {

                qWarning("Incompatible frame pitches");

                setError(IncorrectFormatError);

            } else {

                if (frame.handleType() != XvHandleType) {

                    m_image->data = reinterpret_cast<char *>(frameCopy.bits());

                    //qDebug() << "copy frame";

                    XvPutImage(

                            QX11Info::display(),

                            m_portId,

                            m_winId,

                            m_gc,

                            m_image,

                            m_viewport.x(),

                            m_viewport.y(),

                            m_viewport.width(),

                            m_viewport.height(),

                            m_displayRect.x(),

                            m_displayRect.y(),

                            m_displayRect.width(),

                            m_displayRect.height());

                    m_image->data = 0;

                } else {

                    XvImage *img = frame.handle().value<XvImage*>();

                    //qDebug() << "render directly";

                    if (img)

                        XvShmPutImage(

                           QX11Info::display(),

                           m_portId,

                           m_winId,

                           m_gc,

                           img,

                           m_viewport.x(),

                           m_viewport.y(),

                           m_viewport.width(),

                           m_viewport.height(),

                           m_displayRect.x(),

                           m_displayRect.y(),

                           m_displayRect.width(),

                           m_displayRect.height(),

                           false);

                }

                presented = true;

            }

            frameCopy.unmap();

            return presented;

        }

    }

}

bool QX11VideoSurface::findPort()

{

    unsigned int count = 0;

    XvAdaptorInfo *adaptors = 0;

    bool portFound = false;

    if (XvQueryAdaptors(QX11Info::display(), m_winId, &count, &adaptors) == Success) {

        for (unsigned int i = 0; i < count && !portFound; ++i) {

            if (adaptors[i].type & XvImageMask) {

                m_portId = adaptors[i].base_id;

                for (unsigned int j = 0; j < adaptors[i].num_ports && !portFound; ++j, ++m_portId)

                    portFound = XvGrabPort(QX11Info::display(), m_portId, 0) == Success;

            }

        }

        XvFreeAdaptorInfo(adaptors);

    }

    return portFound;

}

void QX11VideoSurface::querySupportedFormats()

{

    int count = 0;

    if (XvImageFormatValues *imageFormats = XvListImageFormats(

            QX11Info::display(), m_portId, &count)) {

        const int rgbCount = sizeof(qt_xvRgbLookup) / sizeof(XvFormatRgb);

        const int yuvCount = sizeof(qt_xvYuvLookup) / sizeof(XvFormatYuv);

        for (int i = 0; i < count; ++i) {

            switch (imageFormats[i].type) {

            case XvRGB:

                for (int j = 0; j < rgbCount; ++j) {

                    if (imageFormats[i] == qt_xvRgbLookup[j]) {

                        m_supportedPixelFormats.append(qt_xvRgbLookup[j].pixelFormat);

                        m_formatIds.append(imageFormats[i].id);

                        break;

                    }

                }

                break;

            case XvYUV:

                for (int j = 0; j < yuvCount; ++j) {

                    if (imageFormats[i] == qt_xvYuvLookup[j]) {

                        m_supportedPixelFormats.append(qt_xvYuvLookup[j].pixelFormat);

                        m_formatIds.append(imageFormats[i].id);

                        break;

                    }

                }

                break;

            }

        }

        XFree(imageFormats);

    }

    m_brightnessRange = qMakePair(0, 0);

    m_contrastRange = qMakePair(0, 0);

    m_hueRange = qMakePair(0, 0);

    m_saturationRange = qMakePair(0, 0);

    if (XvAttribute *attributes = XvQueryPortAttributes(QX11Info::display(), m_portId, &count)) {

        for (int i = 0; i < count; ++i) {

            if (qstrcmp(attributes[i].name, "XV_BRIGHTNESS") == 0)

                m_brightnessRange = qMakePair(attributes[i].min_value, attributes[i].max_value);

            else if (qstrcmp(attributes[i].name, "XV_CONTRAST") == 0)

                m_contrastRange = qMakePair(attributes[i].min_value, attributes[i].max_value);

            else if (qstrcmp(attributes[i].name, "XV_HUE") == 0)

                m_hueRange = qMakePair(attributes[i].min_value, attributes[i].max_value);