<div dir="auto"><div> <div class="gmail_extra"> <div class="gmail_quote">Le 26 févr. 2018 15:26, "rathaval" <<a href="mailto:rathaval@xilinx.com">rathaval@xilinx.com</a>> a écrit : <blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello Gst Community, I'm trying to write a plugin that is based on the Video Filter as its base class. It works well for no-resizing, 1:1 pass through pipelines. gst-launch-1.0 videotestsrc ! xm2mvscaler device=/dev/xm2mvsc0 batch-size=1 buffer-mode=2 ! video/x-raw,format=RGB,width=1280,height=720,framerate=30/1 ! videoconvert ! fpsdisplaysink videosink="kmssink driver-name=xilinx_drm plane-id=26" text-overlay=false /(Working pipeline)/ When I try to scale it : gst-launch-1.0 videotestsrc ! video/x-raw,format=RGB,width=1280,height=720,framerate=30/1 ! xm2mvscaler device=/dev/xm2mvsc0 batch-size=1 buffer-mode=2 ! video/x-raw,format=RGB,width=1920,height=1080,framerate=30/1 ! videoconvert ! fpsdisplaysink videosink="kmssink driver-name=xilinx_drm plane-id=26" text-overlay=false WARNING: erroneous pipeline: could not link xm2mvscaler0 to videoconvert0 and it *errors out*. After reading a little more of the gstvideofilter.c source code, it appears basing off the VideoFilter class may not be the right thing as it maps the frames for you. * My question is what is the best way to map input buffers and output buffers for HW Accelerated scalers? And does a VideoFilter not support resizing at all ? I'd be glad to post more information, but a hint towards what's not working would be very helpful. * </blockquote></div></div></div><div dir="auto"> </div><div dir="auto">Have a look at GstV4l2Transform element in gst-plugins-good. It's doing this already, but using a standard Linux interface instead of custom set of ioctl. On the software size, have a look at videoscale code.</div><div dir="auto"> </div><div dir="auto"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Looking at gst_video_filter_transform_size routine, I suspect it does not allow resizing. </blockquote></div></div></div><div dir="auto"> </div><div dir="auto">It does allow resizing if you implement it properly. But it seems a bit pointless to debug this element since I don't see any valid upstream argument for this scaler driver to use a custom ioctl interface, hence not use GstV4l2Transform. I have seen the staging submission on linux-media for this driver.</div><div dir="auto"> </div><div dir="auto"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> === Logs 0:00:04.053976831 2358 0x30b1c890 DEBUG capsfilter gstcapsfilter.c:295:gst_capsfilter_transform_caps:<capsfilter1> input: ANY 0:00:04.054003403 2358 0x30b1c890 DEBUG capsfilter gstcapsfilter.c:296:gst_capsfilter_transform_caps:<capsfilter1> filter: (NULL) 0:00:04.054028636 2358 0x30b1c890 DEBUG capsfilter gstcapsfilter.c:298:gst_capsfilter_transform_caps:<capsfilter1> caps filter: video/x-raw, format=(string)RGB, width=(int)1920, height=(int)1080, framerate=(fraction)30/1 0:00:04.054070900 2358 0x30b1c890 DEBUG capsfilter gstcapsfilter.c:299:gst_capsfilter_transform_caps:<capsfilter1> intersect: video/x-raw, format=(string)RGB, width=(int)1920, height=(int)1080, framerate=(fraction)30/1 0:00:04.054115894 2358 0x30b1c890 DEBUG GST_PADS gstpad.c:3938:gst_pad_query:<capsfilter1:sink> sent query 0x30c518a0 (caps), result 1 0:00:04.054153528 2358 0x30b1c890 INFO GST_PADS gstpad.c:2371:gst_pad_link_prepare: caps are incompatible 0:00:04.054178351 2358 0x30b1c890 INFO GST_PADS gstpad.c:2464:gst_pad_link_full: link between xm2mvscaler0:src and capsfilter1:sink failed: no common format === gst-inspect-1.0 output : root@peta_xm2m_vscaler:~# gst-inspect-1.0 xm2mvscaler Factory Details: Rank none (0) Long-name Xilinx M2M Video Scaler Klass Xilinx M2M Video Scaler Description Xilinx M2M Video Scaler Author Rohit Athavale <<a href="mailto:rohit.athavale@xilinx.com">rohit.athavale@xilinx.com</a>> Plugin Details: Name xm2mvscaler Description Xilinx M2M Scaler plugin Filename /usr/lib/gstreamer-1.0/libgstxm2mvscaler.so Version 0.6 License LGPL Source module xm2mvscaler Binary package GStreamer Origin URL <a href="http://gstreamer.net/" rel="noreferrer" target="_blank">http://gstreamer.net/</a> GObject +----GInitiallyUnowned +----GstObject +----GstElement +----GstBaseTransform +----GstVideoFilter +----GstXm2mVScaler Pad Templates: SINK template: 'sink' Availability: Always Capabilities: video/x-raw format: { RGB } width: [ 1, 3840 ] height: [ 1, 2160 ] framerate: [ 0/1, 2147483647/1 ] SRC template: 'src' Availability: Always Capabilities: video/x-raw format: { RGB } width: [ 1, 3840 ] height: [ 1, 2160 ] framerate: [ 0/1, 2147483647/1 ] Element Flags: no flags set Element Implementation: Has change_state() function: gst_element_change_state_func Element has no clocking capabilities. Element has no URI handling capabilities. Pads: SINK: 'sink' Pad Template: 'sink' SRC: 'src' Pad Template: 'src' Element Properties: name : The name of the object flags: readable, writable String. Default: "xm2mvscaler0" parent : The parent of the object flags: readable, writable Object of type "GstObject" qos : Handle Quality-of-Service events flags: readable, writable Boolean. Default: true buffer-mode : Buffer Mode flags: readable, writable Enum "GstXm2mVScalerBufferMode" Default: 0, "" (1): DMABUF - GST_XM2MVSC_BUF_DMABUF (2): Driver allocated contiguous memory - GST_XM2MVSC_BUF_KERNEL_DRV batch-size : Frame Batch Size flags: readable, writable Enum "GstXm2mVScalerBatchSize" Default: 0, "" (1): One - GST_XM2MVSCALER_BATCH_SIZE_ONE (2): Two - GST_XM2MVSCALER_BATCH_SIZE_TWO (8): Eight - GST_XM2MVSCALER_BATCH_SIZE_EIGHT device : Location of Device File being used flags: readable, writable String. Default: "/dev/xm2mvsc0" -- Sent from: <a href="http://gstreamer-devel.966125.n4.nabble.com/" rel="noreferrer" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div> </div></div></div>