buffer_concatenator

This section describes the GStreamer plugin named buffer_concatenator.

Brief Description

This plugin is used for concatenating multiple buffers in a single buffer, saved in a specific order. That is, in config.json if the order for buffer, input_5233, is specified as 0 and for buffer, input_0, is specified as 1, the plugin will look like:

[
  [input_5233][input_0]
]

Config JSON Parameters

   {
 "version": 0.1,
 "node_name": "buffer_concat",
 "memory": {
   "cpu": 0,
   "next_cpu": 0 <================= Memory type used by allocator. 0 means A65 memory will be used
 },
 "system": {
   "out_buf_queue": 1, <=========== Num of output buffers created by the plugin
   "debug": 0,
   "dump_data": 0 <================ Dump the output buffer into file at /tmp
 },
 "buffers": {
   "input": [
     {
       "name": "buffer_1", <======= Name of input buffer
       "size": 36964400, <========= Size of input buffer
       "order": 0, <=============== Order of buffer in output buffer
       "offset" : 0, <============= Offset from which to start copying
       "copy_bytes" : 18482200 <=== Size how many bytes should be copied to output buffer
     },
     {
       "name": "buffer_2",
       "size": 73928800,
       "order": 1,
       "offset" : 36964400,
       "copy_bytes" : 36964400
     }
   ],
   "output": {
     "size": 55446600 <============ Output buffer size = Σ(sizes of input buffers specified in this json)
   }
 }
}

Example Usage

GST_PLUGIN_PATH="/data/YOLOV5/lib" \
GST_DEBUG=2 \
gst-launch-1.0 --gst-plugin-path="/data/YOLOV5/lib" \
simaaisrc location="/data/YOLOV5/dump/yuv_sample" node-name="allegrodec" \
! process-cvu config="/data/YOLOV5/etc/yolov5_pre_proc.json" source-node-name="allegrodec" buffers-list="allegrodec" \
! buffer_concat. \
simaaisrc location="/data/YOLOV5/dump/mla_out" node-name="mla-yolov5" \
! process-cvu config="/data/YOLOV5/etc/yolov5_post_proc.json" source-node-name="mla-yolov5" buffers-list="mla-yolov5" \
! simaaibufferconcat config="/data/YOLOV5/etc/buffer_concat_config.json" name="buffer_concat" silent=false \
! fakesink

gst-inspect-1.0 Output

Plugin Details:
Name                     buffer_concatenator
Description
Filename
Version                  1.18.16
License                  LGPL
Source module            gst-plugins-sima
Binary package
Origin URL               https://bitbucket.org/sima-ai/gst-plugins-sima

buffer_concatenator: SiMa.ai buffer_concatenator element

1 features:
+-- 1 elements

Note

Please refer to buffer_concatenator’s README file for more information.