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videosink: add "show-preroll-frame" property

Browse source 
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
This commit is contained in:
Tim-Philipp Müller 2009-09-08 17:59:30 +01:00
parent 78b0413c5f
commit 265e125993
2 changed files with 98 additions and 4 deletions
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93
gst-libs/gst/video/gstvideosink.c
View file

@ -40,11 +40,28 @@
#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,
@ -111,18 +128,41 @@ gst_video_sink_init (GstVideoSink * videosink)
/* 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
@ -135,10 +175,21 @@ static GstFlowReturn
gst_video_sink_show_preroll_frame (GstBaseSink * bsink, GstBuffer * buf)
{
GstVideoSinkClass *klass;
GstVideoSink *vsink;
gboolean do_show;
klass = GST_VIDEO_SINK_GET_CLASS (bsink);
vsink = GST_VIDEO_SINK_CAST (bsink);
klass = GST_VIDEO_SINK_GET_CLASS (vsink);
if (klass->show_frame == NULL) {
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
@ -171,6 +222,44 @@ gst_video_sink_show_frame (GstBaseSink * bsink, GstBuffer * 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

9
gst-libs/gst/video/gstvideosink.h
View file

@ -64,6 +64,7 @@ G_BEGIN_DECLS
typedef struct _GstVideoSink GstVideoSink;
typedef struct _GstVideoSinkClass GstVideoSinkClass;
typedef struct _GstVideoRectangle GstVideoRectangle;
typedef struct _GstVideoSinkPrivate GstVideoSinkPrivate;
/**
* GstVideoRectangle:
@ -96,14 +97,18 @@ struct _GstVideoSink {
gint width, height;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
GstVideoSinkPrivate *priv;
gpointer _gst_reserved[GST_PADDING - 1];
};
/**
* GstVideoSinkClass:
* @parent_class: the parent class structure
* @show_frame: render a video frame. Maps to #GstBaseSink::render and
* #GstBaseSink::preroll vfuncs. Since: 0.10.25
* #GstBaseSink::preroll vfuncs. Rendering during preroll will be
* suppressed if the 'show-preroll-frame' property is set to #FALSE.
* Since: 0.10.25
*
* The video sink class structure. Derived classes should override the
* @show_frame virtual function.