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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-13 01:46:24 +00:00
3991742d77
Would be nicer if one could just supplement the generic template from the element template though. Also, I would really have liked to just add those sections from the pads template into the element templet directly (so I can cater for src template caps == sink template caps), but that didn't seem to work.
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/* vim: set filetype=c: */
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% ClassName
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GstVideoFilter
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% TYPE_CLASS_NAME
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GST_TYPE_VIDEO_FILTER
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% pads
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sinkpad-template-video srcpad-template-video
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% pkg-config
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gstreamer-video-0.10
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% includes
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#include <gst/video/video.h>
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#include <gst/video/gstvideofilter.h>
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% prototypes
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static gboolean
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gst_replace_start (GstBaseTransform * trans);
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static gboolean
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gst_replace_stop (GstBaseTransform * trans);
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static GstFlowReturn
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gst_replace_transform_ip (GstBaseTransform * trans, GstBuffer * buf);
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static gboolean
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gst_replace_set_caps (GstBaseTransform * trans, GstCaps * incaps,
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GstCaps * outcaps);
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% declare-class
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GstBaseTransformClass *base_transform_class = GST_BASE_TRANSFORM_CLASS (klass);
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% set-methods
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base_transform_class->start = GST_DEBUG_FUNCPTR (gst_replace_start);
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base_transform_class->stop = GST_DEBUG_FUNCPTR (gst_replace_stop);
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base_transform_class->set_caps = GST_DEBUG_FUNCPTR (gst_replace_set_caps);
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base_transform_class->transform_ip = GST_DEBUG_FUNCPTR (gst_replace_transform_ip);
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% methods
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static gboolean
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gst_replace_start (GstBaseTransform * trans)
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{
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/* GstReplace *replace = GST_REPLACE (trans); */
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/* initialize processing */
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return TRUE;
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}
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static gboolean
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gst_replace_stop (GstBaseTransform * trans)
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{
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/* GstReplace *replace = GST_REPLACE (trans); */
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/* finalize processing */
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return TRUE;
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}
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static gboolean
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gst_replace_set_caps (GstBaseTransform * trans, GstCaps * incaps,
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GstCaps * outcaps)
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{
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/* GstReplace *replace = GST_REPLACE (trans); */
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GstVideoFormat video_format;
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int w, h;
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/* parse input caps, output caps are the same so we ignore them */
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if (!gst_video_format_parse_caps (incaps, &video_format, &w, &h))
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return FALSE;
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/* You'll need to add those fields to the instance struct first */
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/* replace->video_format = video_format; */
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/* replace->width = w; */
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/* replace->height = h; */
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return TRUE;
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}
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static GstFlowReturn
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gst_replace_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
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{
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/* GstReplace *replace = GST_REPLACE (trans); */
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/* process the video data in the buffer in-place */
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return GST_FLOW_OK;
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}
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% end
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