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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 "GStreamerUtilities.h"
#include <cairo.h>
#include <gst/gst.h>
#include <gst/video/gstvideometa.h>
using namespace std;
using namespace WebCore;
ImageGStreamer::ImageGStreamer(GstBuffer* buffer, GstCaps* caps)
{
GstVideoInfo videoInfo;
gst_video_info_init(&videoInfo);
if (!gst_video_info_from_caps(&videoInfo, caps))
return;
// Right now the TextureMapper only supports chromas with one plane
ASSERT(GST_VIDEO_INFO_N_PLANES(&videoInfo) == 1);
if (!gst_video_frame_map(&m_videoFrame, &videoInfo, buffer, GST_MAP_READ))
return;
unsigned char* bufferData = reinterpret_cast<unsigned char*>(GST_VIDEO_FRAME_PLANE_DATA(&m_videoFrame, 0));
cairo_format_t cairoFormat;
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
cairoFormat = (GST_VIDEO_FRAME_FORMAT(&m_videoFrame) == GST_VIDEO_FORMAT_BGRA) ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24;
#else
cairoFormat = (GST_VIDEO_FRAME_FORMAT(&m_videoFrame) == GST_VIDEO_FORMAT_ARGB) ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24;
#endif
int stride = GST_VIDEO_FRAME_PLANE_STRIDE(&m_videoFrame, 0);
int width = GST_VIDEO_FRAME_WIDTH(&m_videoFrame);
int height = GST_VIDEO_FRAME_HEIGHT(&m_videoFrame);
RefPtr<cairo_surface_t> surface = adoptRef(cairo_image_surface_create_for_data(bufferData, cairoFormat, width, height, stride));
ASSERT(cairo_surface_status(surface.get()) == CAIRO_STATUS_SUCCESS);
m_image = BitmapImage::create(surface.release());
if (GstVideoCropMeta* cropMeta = gst_buffer_get_video_crop_meta(buffer))
setCropRect(FloatRect(cropMeta->x, cropMeta->y, cropMeta->width, cropMeta->height));
}
ImageGStreamer::~ImageGStreamer()
{
if (m_image)
m_image.clear();
m_image = 0;
// 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_video_frame_unmap(&m_videoFrame);
}
#endif // USE(GSTREAMER)
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