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videoencoder: Add support for subclasses to propose allocation parameters

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This commit is contained in:
Sebastian Dröge 2012-04-24 22:42:59 +02:00
parent 894875d705
commit 3de8d58c4e
2 changed files with 27 additions and 0 deletions
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21
gst-libs/gst/video/gstvideoencoder.c
View file

@ -122,6 +122,8 @@
#include "gstvideoencoder.h"
#include "gstvideoutils.h"
#include <gst/video/gstvideometa.h>
#include <string.h>
GST_DEBUG_CATEGORY (videoencoder_debug);
@ -219,6 +221,8 @@ static gboolean gst_video_encoder_sink_event_default (GstVideoEncoder * encoder,
GstEvent * event);
static gboolean gst_video_encoder_src_event_default (GstVideoEncoder * encoder,
GstEvent * event);
static gboolean gst_video_encoder_propose_allocation_default (GstVideoEncoder *
encoder, GstQuery * query);
/* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
* method to get to the padtemplates */
@ -278,6 +282,7 @@ gst_video_encoder_class_init (GstVideoEncoderClass * klass)
klass->sink_event = gst_video_encoder_sink_event_default;
klass->src_event = gst_video_encoder_src_event_default;
klass->propose_allocation = gst_video_encoder_propose_allocation_default;
}
static void
@ -702,6 +707,14 @@ gst_video_encoder_sink_getcaps (GstVideoEncoder * encoder, GstCaps * filter)
return caps;
}
static gboolean
gst_video_encoder_propose_allocation_default (GstVideoEncoder * encoder,
GstQuery * query)
{
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE);
return TRUE;
}
static gboolean
gst_video_encoder_sink_query (GstPad * pad, GstObject * parent,
@ -724,6 +737,14 @@ gst_video_encoder_sink_query (GstPad * pad, GstObject * parent,
res = TRUE;
break;
}
case GST_QUERY_ALLOCATION:
{
GstVideoEncoderClass *klass = GST_VIDEO_ENCODER_GET_CLASS (encoder);
if (klass->propose_allocation)
res = klass->propose_allocation (encoder, query);
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;

6
gst-libs/gst/video/gstvideoencoder.h
View file

@ -213,6 +213,9 @@ struct _GstVideoEncoder
* Event handler on the source pad. This function should return
* TRUE if the event was handled and should be discarded
* (i.e. not unref'ed).
* @propose_allocation: Optional.
* Propose buffer allocation parameters for upstream elements.
* The default implementation proposes the VIDEO_META.
*
* Subclasses can override any of the available virtual methods or not, as
* needed. At minimum @handle_frame needs to be overridden, and @set_format
@ -258,6 +261,9 @@ struct _GstVideoEncoderClass
gboolean (*src_event) (GstVideoEncoder *encoder,
GstEvent *event);
gboolean (*propose_allocation) (GstVideoEncoder * encoder,
GstQuery * query);
/*< private >*/
/* FIXME before moving to base */
gpointer _gst_reserved[GST_PADDING_LARGE];