/* * GStreamer Video sink. * * Copyright (C) <2003> Julien Moutte <julien@moutte.net> * * 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; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:gstvideosink * @short_description: Base class for video sinks * * <refsect2> * <para> * Provides useful functions and a base class for video sinks. Right now it's * mostly used as a place holder for adding common code later on. * </para> * </refsect2> */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gstvideosink.h" static GstElementClass *parent_class = NULL; /** * gst_video_sink_center_rect: * @src: the #GstVideoRectangle describing the source area * @dst: the #GstVideoRectangle describing the destination area * @result: a pointer to a #GstVideoRectangle which will receive the result area * @scaling: a #gboolean indicating if scaling should be applied or not * * Takes @src rectangle and position it at the center of @dst rectangle with or * without @scaling. It handles clipping if the @src rectangle is bigger than * the @dst one and @scaling is set to FALSE. */ void gst_video_sink_center_rect (GstVideoRectangle src, GstVideoRectangle dst, GstVideoRectangle * result, gboolean scaling) { g_return_if_fail (result != NULL); if (!scaling) { result->w = MIN (src.w, dst.w); result->h = MIN (src.h, dst.h); result->x = (dst.w - result->w) / 2; result->y = (dst.h - result->h) / 2; } else { gdouble src_ratio, dst_ratio; src_ratio = (gdouble) src.w / src.h; dst_ratio = (gdouble) dst.w / dst.h; if (src_ratio > dst_ratio) { result->w = dst.w; result->h = dst.w / src_ratio; result->x = 0; result->y = (dst.h - result->h) / 2; } else if (src_ratio < dst_ratio) { result->w = dst.h * src_ratio; result->h = dst.h; result->x = (dst.w - result->w) / 2; result->y = 0; } else { result->x = 0; result->y = 0; result->w = dst.w; result->h = dst.h; } } GST_DEBUG ("source is %dx%d dest is %dx%d, result is %dx%d with x,y %dx%d", src.w, src.h, dst.w, dst.h, result->w, result->h, result->x, result->y); } /* Initing stuff */ static void gst_video_sink_init (GstVideoSink * videosink) { videosink->width = 0; videosink->height = 0; } static void gst_video_sink_class_init (GstVideoSinkClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; parent_class = g_type_class_ref (GST_TYPE_ELEMENT); } /* Public methods */ GType gst_video_sink_get_type (void) { static GType videosink_type = 0; if (!videosink_type) { static const GTypeInfo videosink_info = { sizeof (GstVideoSinkClass), NULL, NULL, (GClassInitFunc) gst_video_sink_class_init, NULL, NULL, sizeof (GstVideoSink), 0, (GInstanceInitFunc) gst_video_sink_init, }; videosink_type = g_type_register_static (GST_TYPE_BASE_SINK, "GstVideoSink", &videosink_info, 0); } return videosink_type; }