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tools: add videofilter template for gst-element-maker

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This commit is contained in:
Tim-Philipp Müller 2012-03-17 15:16:29 +00:00
parent 692bf9ba63
commit e504dc3f6b
1 changed files with 78 additions and 0 deletions
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78
tools/element-templates/videofilter Normal file
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/* vim: set filetype=c: */
% ClassName
GstVideoFilter
% TYPE_CLASS_NAME
GST_TYPE_VIDEO_FILTER
% pads
sinkpad-simple srcpad-simple
% pkg-config
gstreamer-video-0.10
% includes
#include <gst/video/video.h>
#include <gst/video/gstvideofilter.h>
% prototypes
static gboolean
gst_replace_start (GstBaseTransform * trans);
static gboolean
gst_replace_stop (GstBaseTransform * trans);
static GstFlowReturn
gst_replace_transform_ip (GstBaseTransform * trans, GstBuffer * buf);
static gboolean
gst_replace_set_caps (GstBaseTransform * trans, GstCaps * incaps,
GstCaps * outcaps);
% declare-class
GstBaseTransformClass *base_transform_class = GST_BASE_TRANSFORM_CLASS (klass);
% set-methods
base_transform_class->start = GST_DEBUG_FUNCPTR (gst_replace_start);
base_transform_class->stop = GST_DEBUG_FUNCPTR (gst_replace_stop);
base_transform_class->set_caps = GST_DEBUG_FUNCPTR (gst_replace_set_caps);
base_transform_class->transform_ip = GST_DEBUG_FUNCPTR (gst_replace_transform_ip);
% methods
static gboolean
gst_replace_start (GstBaseTransform * trans)
{
/* GstReplace *replace = GST_REPLACE (trans); */
/* initialize processing */
return TRUE;
}
static gboolean
gst_replace_stop (GstBaseTransform * trans)
{
/* GstReplace *replace = GST_REPLACE (trans); */
/* finalize processing */
return TRUE;
}
static gboolean
gst_replace_set_caps (GstBaseTransform * trans, GstCaps * incaps,
GstCaps * outcaps)
{
/* GstReplace *replace = GST_REPLACE (trans); */
GstVideoFormat video_format;
int w, h;
/* parse input caps, output caps are the same so we ignore them */
if (!gst_video_format_parse_caps (incaps, &video_format, &w, &h))
return FALSE;
/* You'll need to add those fields to the instance struct first */
/* replace->video_format = video_format; */
/* replace->width = w; */
/* replace->height = h; */
return TRUE;
}
static GstFlowReturn
gst_replace_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
{
/* GstReplace *replace = GST_REPLACE (trans); */
/* process the video data in the buffer in-place */
return GST_FLOW_OK;
}
% end