1/* 2 * Copyright (C) 2010 Igalia S.L 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20#include "config.h" 21#include "ImageGStreamer.h" 22 23#if ENABLE(VIDEO) && USE(GSTREAMER) 24 25#include <cairo.h> 26#include <gst/gst.h> 27#include <gst/video/video.h> 28#include <wtf/gobject/GOwnPtr.h> 29 30#ifdef GST_API_VERSION_1 31#include <gst/video/gstvideometa.h> 32#endif 33 34 35using namespace std; 36using namespace WebCore; 37 38ImageGStreamer::ImageGStreamer(GstBuffer* buffer, GstCaps* caps) 39#ifdef GST_API_VERSION_1 40 : m_buffer(buffer) 41#endif 42{ 43 GstVideoFormat format; 44 IntSize size; 45 int pixelAspectRatioNumerator, pixelAspectRatioDenominator, stride; 46 getVideoSizeAndFormatFromCaps(caps, size, format, pixelAspectRatioNumerator, pixelAspectRatioDenominator, stride); 47 48#ifdef GST_API_VERSION_1 49 gst_buffer_map(buffer, &m_mapInfo, GST_MAP_READ); 50 unsigned char* bufferData = reinterpret_cast<unsigned char*>(m_mapInfo.data); 51#else 52 unsigned char* bufferData = reinterpret_cast<unsigned char*>(GST_BUFFER_DATA(buffer)); 53#endif 54 55 cairo_format_t cairoFormat; 56#if G_BYTE_ORDER == G_LITTLE_ENDIAN 57 cairoFormat = (format == GST_VIDEO_FORMAT_BGRA) ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24; 58#else 59 cairoFormat = (format == GST_VIDEO_FORMAT_ARGB) ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24; 60#endif 61 62 RefPtr<cairo_surface_t> surface = adoptRef(cairo_image_surface_create_for_data(bufferData, cairoFormat, size.width(), size.height(), stride)); 63 ASSERT(cairo_surface_status(surface.get()) == CAIRO_STATUS_SUCCESS); 64 m_image = BitmapImage::create(surface.release()); 65 66#ifdef GST_API_VERSION_1 67 if (GstVideoCropMeta* cropMeta = gst_buffer_get_video_crop_meta(buffer)) 68 setCropRect(FloatRect(cropMeta->x, cropMeta->y, cropMeta->width, cropMeta->height)); 69#endif 70} 71 72ImageGStreamer::~ImageGStreamer() 73{ 74 if (m_image) 75 m_image.clear(); 76 77 m_image = 0; 78 79#ifdef GST_API_VERSION_1 80 // We keep the buffer memory mapped until the image is destroyed because the internal 81 // cairo_surface_t was created using cairo_image_surface_create_for_data(). 82 gst_buffer_unmap(m_buffer.get(), &m_mapInfo); 83#endif 84} 85#endif // USE(GSTREAMER) 86