/*  This file is part of the KDE project.

Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

This library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2.1 or 3 of the License.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this library.  If not, see <http://www.gnu.org/licenses/>.
*/


#include "videorenderer_vmr9.h"

#ifndef QT_NO_PHONON_VIDEO

#include <QtGui/QWidget>
#include <QtGui/QPainter>

#include <d3d9.h>
#include <vmr9.h>

QT_BEGIN_NAMESPACE


namespace Phonon
{
    namespace DS9
    {
        VideoRendererVMR9::~VideoRendererVMR9()
        {
        }

        bool VideoRendererVMR9::isNative() const
        {
            return true;
        }


        VideoRendererVMR9::VideoRendererVMR9(QWidget *target) : m_target(target)
        {
            m_filter = Filter(CLSID_VideoMixingRenderer9, IID_IBaseFilter);
            if (!m_filter) {
                return;
            }

            ComPointer<IVMRFilterConfig9> config(m_filter, IID_IVMRFilterConfig9);
            Q_ASSERT(config);
            HRESULT hr = config->SetRenderingMode(VMR9Mode_Windowless);
            Q_ASSERT(SUCCEEDED(hr));
            hr = config->SetNumberOfStreams(1); //for now we limit it to 1 input stream
            Q_ASSERT(SUCCEEDED(hr));
            ComPointer<IVMRWindowlessControl9> windowlessControl(m_filter, IID_IVMRWindowlessControl9);
            windowlessControl->SetVideoClippingWindow(reinterpret_cast<HWND>(target->winId()));
            windowlessControl->SetAspectRatioMode(VMR9ARMode_None); //we're in control of the size
        }

        QImage VideoRendererVMR9::snapshot() const
        {
            ComPointer<IVMRWindowlessControl9> windowlessControl(m_filter, IID_IVMRWindowlessControl9);
            if (windowlessControl) {
                BYTE *buffer = 0;
                HRESULT hr = windowlessControl->GetCurrentImage(&buffer);
                if (SUCCEEDED(hr)) {

                    const BITMAPINFOHEADER  *bmi = reinterpret_cast<BITMAPINFOHEADER*>(buffer);
                    const int w = qAbs(bmi->biWidth),
                        h = qAbs(bmi->biHeight);

                    // Create image and copy data into image.
                    QImage ret(w, h, QImage::Format_RGB32);

                    if (!ret.isNull()) {
                        uchar *data = buffer + bmi->biSize;
                        const int bytes_per_line = w * sizeof(QRgb);
                        for (int y = h - 1; y >= 0; --y) {
                            qMemCopy(ret.scanLine(y), //destination
                                data,     //source
                                bytes_per_line);
                            data += bytes_per_line;
                        }
                    }
                    ::CoTaskMemFree(buffer);
                    return ret;
                }
            }
            return QImage();
        }

        QSize VideoRendererVMR9::videoSize() const
        {
            LONG w = 0,
                h = 0;
            ComPointer<IVMRWindowlessControl9> windowlessControl(m_filter, IID_IVMRWindowlessControl9);
            if (windowlessControl) {
                windowlessControl->GetNativeVideoSize( &w, &h, 0, 0);
            }
            return QSize(w, h);
        }
       
        void VideoRendererVMR9::repaintCurrentFrame(QWidget *target, const QRect &rect)
        {
            HDC hDC = target->getDC();
            // repaint the video
            ComPointer<IVMRWindowlessControl9> windowlessControl(m_filter, IID_IVMRWindowlessControl9);

            HRESULT hr = windowlessControl ? windowlessControl->RepaintVideo(target->winId(), hDC) : E_POINTER;
            if (FAILED(hr) || m_dstY > 0 || m_dstX > 0) {
                const QColor c = target->palette().color(target->backgroundRole());
                COLORREF color = RGB(c.red(), c.green(), c.blue());
                HPEN hPen = ::CreatePen(PS_SOLID, 1, color);
                HBRUSH hBrush = ::CreateSolidBrush(color);
                ::SelectObject(hDC, hPen);
                ::SelectObject(hDC, hBrush);
                // repaint the video
                if (FAILED(hr)) {
                    //black background : we use the Win32 API to avoid the ghost effect of the backing store
                    ::Rectangle(hDC, 0, 0, target->width(), target->height());
                } else {
                    if (m_dstY > 0) {
                        ::Rectangle(hDC, 0, 0, target->width(), m_dstY); //top
                        ::Rectangle(hDC, 0, target->height() - m_dstY, target->width(), target->height()); //bottom
                    }
                    if (m_dstX > 0) {
                        ::Rectangle(hDC, 0, m_dstY, m_dstX, m_dstHeight + m_dstY); //left
                        ::Rectangle(hDC, m_dstWidth + m_dstX, m_dstY, target->width(), m_dstHeight + m_dstY); //right
                    }
                }
                ::DeleteObject(hPen);
                ::DeleteObject(hBrush);
            }
            target->releaseDC(hDC);

        }

        void VideoRendererVMR9::notifyResize(const QSize &size, Phonon::VideoWidget::AspectRatio aspectRatio,
            Phonon::VideoWidget::ScaleMode scaleMode)
        {
            if (!isActive()) {
                RECT dummyRect = { 0, 0, 0, 0};
                ComPointer<IVMRWindowlessControl9> windowlessControl(m_filter, IID_IVMRWindowlessControl9);
                windowlessControl->SetVideoPosition(&dummyRect, &dummyRect);
                return;
            }


            const QSize vsize = videoSize();
            internalNotifyResize(size, vsize, aspectRatio, scaleMode);

            RECT dstRectWin = { m_dstX, m_dstY, m_dstWidth + m_dstX, m_dstHeight + m_dstY};
            RECT srcRectWin = { 0, 0, vsize.width(), vsize.height()};

            ComPointer<IVMRWindowlessControl9> windowlessControl(m_filter, IID_IVMRWindowlessControl9);
            if (windowlessControl) {
                windowlessControl->SetVideoPosition(&srcRectWin, &dstRectWin);
            }
        }

        void VideoRendererVMR9::applyMixerSettings(qreal brightness, qreal contrast, qreal hue, qreal saturation)
        {
            InputPin sink = BackendNode::pins(m_filter, PINDIR_INPUT).first();
            OutputPin source;
            if (FAILED(sink->ConnectedTo(source.pparam()))) {
                return; //it must be connected to work
            }

            //get the mixer (used for brightness/contrast/saturation/hue)
            ComPointer<IVMRMixerControl9> mixer(m_filter, IID_IVMRMixerControl9);
            Q_ASSERT(mixer);

            VMR9ProcAmpControl ctrl;
            ctrl.dwSize = sizeof(ctrl);
            ctrl.dwFlags = ProcAmpControl9_Contrast | ProcAmpControl9_Brightness | ProcAmpControl9_Saturation | ProcAmpControl9_Hue;
            VMR9ProcAmpControlRange range;
            range.dwSize = sizeof(range);

            range.dwProperty = ProcAmpControl9_Contrast;
            HRESULT hr = mixer->GetProcAmpControlRange(0, &range);
            if (FAILED(hr)) {
                return;
            }
            ctrl.Contrast = ((contrast < 0 ? range.MinValue : range.MaxValue) - range.DefaultValue) * qAbs(contrast) + range.DefaultValue;

            //brightness
            range.dwProperty = ProcAmpControl9_Brightness;
            hr = mixer->GetProcAmpControlRange(0, &range);
            if (FAILED(hr)) {
                return;
            }
            ctrl.Brightness = ((brightness < 0 ? range.MinValue : range.MaxValue) - range.DefaultValue) * qAbs(brightness) + range.DefaultValue;

            //saturation
            range.dwProperty = ProcAmpControl9_Saturation;
            hr = mixer->GetProcAmpControlRange(0, &range);
            if (FAILED(hr)) {
                return;
            }
            ctrl.Saturation = ((saturation < 0 ? range.MinValue : range.MaxValue) - range.DefaultValue) * qAbs(saturation) + range.DefaultValue;

            //hue
            range.dwProperty = ProcAmpControl9_Hue;
            hr = mixer->GetProcAmpControlRange(0, &range);
            if (FAILED(hr)) {
                return;
            }
            ctrl.Hue = ((hue < 0 ? range.MinValue : range.MaxValue) - range.DefaultValue) * qAbs(hue) + range.DefaultValue;

            //finally set the settings
            mixer->SetProcAmpControl(0, &ctrl);
        }
    }
}

QT_END_NAMESPACE

#endif //QT_NO_PHONON_VIDEO