mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-04 23:46:43 +00:00
265e125993
Add a property to disable rendering of video frames during preroll. This will only work for videosinks that use the new ::show_frame() vfunc instead of overriding basesink's preroll and render vfuncs directly. API: GstVideoSink:show-preroll-frame
288 lines
8.1 KiB
C
288 lines
8.1 KiB
C
/* 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;
|
|
}
|