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v4l2sink: implement gstvideosink.show_frame instead of gstbasesink.render

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It allows to show preroll frame. Especially it allows to update the
frame when seeking in PAUSED state.

https://bugzilla.gnome.org/show_bug.cgi?id=722303
This commit is contained in:
Julien Isorce 2014-05-26 10:59:55 -04:00 committed by Nicolas Dufresne
parent ea340455ae
commit 5c07e6b45c
1 changed files with 10 additions and 7 deletions
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17
sys/v4l2/gstv4l2sink.c
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@ -114,7 +114,7 @@ static gboolean gst_v4l2sink_propose_allocation (GstBaseSink * bsink,
GstQuery * query);
static GstCaps *gst_v4l2sink_get_caps (GstBaseSink * bsink, GstCaps * filter);
static gboolean gst_v4l2sink_set_caps (GstBaseSink * bsink, GstCaps * caps);
static GstFlowReturn gst_v4l2sink_show_frame (GstBaseSink * bsink,
static GstFlowReturn gst_v4l2sink_show_frame (GstVideoSink * bsink,
GstBuffer * buf);
static void
@ -123,10 +123,12 @@ gst_v4l2sink_class_init (GstV4l2SinkClass * klass)
GObjectClass *gobject_class;
GstElementClass *element_class;
GstBaseSinkClass *basesink_class;
GstVideoSinkClass *videosink_class;
gobject_class = G_OBJECT_CLASS (klass);
element_class = GST_ELEMENT_CLASS (klass);
basesink_class = GST_BASE_SINK_CLASS (klass);
videosink_class = GST_VIDEO_SINK_CLASS (klass);
gobject_class->finalize = (GObjectFinalizeFunc) gst_v4l2sink_finalize;
gobject_class->set_property = gst_v4l2sink_set_property;
@ -183,7 +185,8 @@ gst_v4l2sink_class_init (GstV4l2SinkClass * klass)
basesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_v4l2sink_set_caps);
basesink_class->propose_allocation =
GST_DEBUG_FUNCPTR (gst_v4l2sink_propose_allocation);
basesink_class->render = GST_DEBUG_FUNCPTR (gst_v4l2sink_show_frame);
videosink_class->show_frame = GST_DEBUG_FUNCPTR (gst_v4l2sink_show_frame);
klass->v4l2_class_devices = NULL;
@ -558,10 +561,10 @@ gst_v4l2sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
/* called after A/V sync to render frame */
static GstFlowReturn
gst_v4l2sink_show_frame (GstBaseSink * bsink, GstBuffer * buf)
gst_v4l2sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
{
GstFlowReturn ret;
GstV4l2Sink *v4l2sink = GST_V4L2SINK (bsink);
GstV4l2Sink *v4l2sink = GST_V4L2SINK (vsink);
GstV4l2Object *obj = v4l2sink->v4l2object;
GstBufferPool *bpool = GST_BUFFER_POOL (obj->pool);
@ -574,7 +577,7 @@ gst_v4l2sink_show_frame (GstBaseSink * bsink, GstBuffer * buf)
GstStructure *config;
/* this pool was not activated, configure and activate */
GST_DEBUG_OBJECT (bsink, "activating pool");
GST_DEBUG_OBJECT (v4l2sink, "activating pool");
config = gst_buffer_pool_get_config (bpool);
gst_buffer_pool_config_add_option (config,
@ -593,12 +596,12 @@ gst_v4l2sink_show_frame (GstBaseSink * bsink, GstBuffer * buf)
/* ERRORS */
not_negotiated:
{
GST_ERROR_OBJECT (bsink, "not negotiated");
GST_ERROR_OBJECT (v4l2sink, "not negotiated");
return GST_FLOW_NOT_NEGOTIATED;
}
activate_failed:
{
GST_ELEMENT_ERROR (bsink, RESOURCE, SETTINGS,
GST_ELEMENT_ERROR (v4l2sink, RESOURCE, SETTINGS,
(_("Failed to allocated required memory.")),
("Buffer pool activation failed"));
return GST_FLOW_ERROR;