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/*
Copyright (C) 2010 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 Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "ImageGStreamer.h"
#if ENABLE(VIDEO) && USE(GSTREAMER)
#include <gst/gst.h>
#include <gst/video/video.h>
#ifdef GST_API_VERSION_1
#include <gst/video/gstvideometa.h>
#endif
#include <wtf/gobject/GOwnPtr.h>
using namespace WebCore;
ImageGStreamer::ImageGStreamer(GstBuffer* buffer, GstCaps* caps)
#ifdef GST_API_VERSION_1
: m_buffer(buffer)
#endif
{
GstVideoFormat format;
IntSize size;
int pixelAspectRatioNumerator, pixelAspectRatioDenominator, stride;
getVideoSizeAndFormatFromCaps(caps, size, format, pixelAspectRatioNumerator, pixelAspectRatioDenominator, stride);
#ifdef GST_API_VERSION_1
gst_buffer_map(buffer, &m_mapInfo, GST_MAP_READ);
uchar* bufferData = reinterpret_cast<uchar*>(m_mapInfo.data);
if (size.width() * size.height() * 4 > m_mapInfo.maxsize) {
qWarning("Ignoring dangerously invalid frame emitted by GStreamer.");
return;
}
#else
uchar* bufferData = reinterpret_cast<uchar*>(GST_BUFFER_DATA(buffer));
#endif
QImage::Format imageFormat;
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
imageFormat = (format == GST_VIDEO_FORMAT_BGRA) ? QImage::Format_ARGB32_Premultiplied : QImage::Format_RGB32;
#else
imageFormat = (format == GST_VIDEO_FORMAT_ARGB) ? QImage::Format_ARGB32_Premultiplied : QImage::Format_RGB32;
#endif
QImage image(bufferData, size.width(), size.height(), imageFormat);
QPixmap *surface = new QPixmap(QPixmap::fromImage(qMove(image), Qt::NoFormatConversion));
m_image = BitmapImage::create(surface);
#ifdef GST_API_VERSION_1
if (GstVideoCropMeta* cropMeta = gst_buffer_get_video_crop_meta(buffer))
setCropRect(FloatRect(cropMeta->x, cropMeta->y, cropMeta->width, cropMeta->height));
#endif
}
ImageGStreamer::~ImageGStreamer()
{
if (m_image)
m_image.clear();
m_image = 0;
#ifdef GST_API_VERSION_1
// We keep the buffer memory mapped until the image is destroyed because the internal
// QImage/QPixmap was created using the buffer data directly.
gst_buffer_unmap(m_buffer.get(), &m_mapInfo);
#endif
}
#endif // USE(GSTREAMER)
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