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/*
* Copyright (C) 2010 Igalia S.L
*
* 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 <cairo.h>
#include <gst/gst.h>
#include <gst/video/video.h>
#include <wtf/gobject/GOwnPtr.h>
#ifdef GST_API_VERSION_1
#include <gst/video/gstvideometa.h>
#endif
using namespace std;
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);
unsigned char* bufferData = reinterpret_cast<unsigned char*>(m_mapInfo.data);
#else
unsigned char* bufferData = reinterpret_cast<unsigned char*>(GST_BUFFER_DATA(buffer));
#endif
cairo_format_t cairoFormat;
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
cairoFormat = (format == GST_VIDEO_FORMAT_BGRA) ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24;
#else
cairoFormat = (format == GST_VIDEO_FORMAT_ARGB) ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24;
#endif
RefPtr<cairo_surface_t> surface = adoptRef(cairo_image_surface_create_for_data(bufferData, cairoFormat, size.width(), size.height(), stride));
ASSERT(cairo_surface_status(surface.get()) == CAIRO_STATUS_SUCCESS);
m_image = BitmapImage::create(surface.release());
#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
// cairo_surface_t was created using cairo_image_surface_create_for_data().
gst_buffer_unmap(m_buffer.get(), &m_mapInfo);
#endif
}
#endif // USE(GSTREAMER)
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