--- /dev/null
+/* GStreamer video sink base class
+ * Copyright (C) <2003> Julien Moutte <julien@moutte.net>
+ * Copyright (C) <2009> Tim-Philipp Müller <tim centricular 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.
+ * </para>
+ * <para>
+ * GstVideoSink will configure the default base sink to drop frames that
+ * arrive later than 20ms as this is considered the default threshold for
+ * observing out-of-sync frames.
+ * </para>
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstvideosink.h"
+
+enum
+{
+ PROP_SHOW_PREROLL_FRAME = 1
+};
+
+#define DEFAULT_SHOW_PREROLL_FRAME TRUE
+
+struct _GstVideoSinkPrivate
+{
+ gboolean show_preroll_frame; /* ATOMIC */
+};
+
+GST_DEBUG_CATEGORY_STATIC (video_sink_debug);
+#define GST_CAT_DEFAULT video_sink_debug
+
+static GstBaseSinkClass *parent_class = NULL;
+
+static void gst_video_sink_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_video_sink_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static GstFlowReturn gst_video_sink_show_preroll_frame (GstBaseSink * bsink,
+ GstBuffer * buf);
+static GstFlowReturn gst_video_sink_show_frame (GstBaseSink * bsink,
+ GstBuffer * buf);
+
+/**
+ * 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;
+
+ /* 20ms is more than enough, 80-130ms is noticable */
+ gst_base_sink_set_max_lateness (GST_BASE_SINK (videosink), 20 * GST_MSECOND);
+ gst_base_sink_set_qos_enabled (GST_BASE_SINK (videosink), TRUE);
+
+ videosink->priv = G_TYPE_INSTANCE_GET_PRIVATE (videosink,
+ GST_TYPE_VIDEO_SINK, GstVideoSinkPrivate);
+}
+
+static void
+gst_video_sink_class_init (GstVideoSinkClass * klass)
+{
+ GstBaseSinkClass *basesink_class = (GstBaseSinkClass *) klass;
+ GObjectClass *gobject_class = (GObjectClass *) klass;
+
+ parent_class = g_type_class_peek_parent (klass);
+
+ gobject_class->set_property = gst_video_sink_set_property;
+ gobject_class->get_property = gst_video_sink_get_property;
+
+ /**
+ * GstVideoSink:show-preroll-frame
+ *
+ * Whether to show video frames during preroll. If set to #FALSE, video
+ * frames will only be rendered in PLAYING state.
+ *
+ * Since: 0.10.25
+ */
+ g_object_class_install_property (gobject_class, PROP_SHOW_PREROLL_FRAME,
+ g_param_spec_boolean ("show-preroll-frame", "Show preroll frame",
+ "Whether to render video frames during preroll",
+ DEFAULT_SHOW_PREROLL_FRAME,
+ G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
+
+ basesink_class->render = GST_DEBUG_FUNCPTR (gst_video_sink_show_frame);
+ basesink_class->preroll =
+ GST_DEBUG_FUNCPTR (gst_video_sink_show_preroll_frame);
+
+ g_type_class_add_private (klass, sizeof (GstVideoSinkPrivate));
+}
+
+static void
+gst_video_sink_base_init (gpointer g_class)
+{
+ GST_DEBUG_CATEGORY_INIT (video_sink_debug, "videosink", 0, "GstVideoSink");
+}
+
+static GstFlowReturn
+gst_video_sink_show_preroll_frame (GstBaseSink * bsink, GstBuffer * buf)
+{
+ GstVideoSinkClass *klass;
+ GstVideoSink *vsink;
+ gboolean do_show;
+
+ vsink = GST_VIDEO_SINK_CAST (bsink);
+ klass = GST_VIDEO_SINK_GET_CLASS (vsink);
+
+ do_show = g_atomic_int_get (&vsink->priv->show_preroll_frame);
+
+ if (G_UNLIKELY (!do_show)) {
+ GST_DEBUG_OBJECT (bsink, "not rendering frame with ts=%" GST_TIME_FORMAT
+ ", preroll rendering disabled",
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
+ }
+
+ if (klass->show_frame == NULL || !do_show) {
+ if (parent_class->preroll != NULL)
+ return parent_class->preroll (bsink, buf);
+ else
+ return GST_FLOW_OK;
+ }
+
+ GST_LOG_OBJECT (bsink, "rendering frame, ts=%" GST_TIME_FORMAT,
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
+
+ return klass->show_frame (GST_VIDEO_SINK_CAST (bsink), buf);
+}
+
+static GstFlowReturn
+gst_video_sink_show_frame (GstBaseSink * bsink, GstBuffer * buf)
+{
+ GstVideoSinkClass *klass;
+
+ klass = GST_VIDEO_SINK_GET_CLASS (bsink);
+
+ if (klass->show_frame == NULL) {
+ if (parent_class->render != NULL)
+ return parent_class->render (bsink, buf);
+ else
+ return GST_FLOW_OK;
+ }
+
+ GST_LOG_OBJECT (bsink, "rendering frame, ts=%" GST_TIME_FORMAT,
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
+
+ return klass->show_frame (GST_VIDEO_SINK_CAST (bsink), buf);
+}
+
+static void
+gst_video_sink_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstVideoSink *vsink;
+
+ vsink = GST_VIDEO_SINK (object);
+
+ switch (prop_id) {
+ case PROP_SHOW_PREROLL_FRAME:
+ g_atomic_int_set (&vsink->priv->show_preroll_frame,
+ g_value_get_boolean (value));
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_video_sink_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstVideoSink *vsink;
+
+ vsink = GST_VIDEO_SINK (object);
+
+ switch (prop_id) {
+ case PROP_SHOW_PREROLL_FRAME:
+ g_value_set_boolean (value,
+ g_atomic_int_get (&vsink->priv->show_preroll_frame));
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+/* Public methods */
+
+GType
+gst_video_sink_get_type (void)
+{
+ static GType videosink_type = 0;
+
+ if (!videosink_type) {
+ static const GTypeInfo videosink_info = {
+ sizeof (GstVideoSinkClass),
+ gst_video_sink_base_init,
+ 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;
+}
projects / mafwsubrenderer / blobdiff