gst-plugins-imsdk: Add TensorFlow Lite plugin support (#1549)

- Add tflite option to PACKAGECONFIG to enable building the TensorFlow
Lite plugin.
- The corresponding tensorflow-lite recipe is present meta-qcom-distro
layer.
- A .bbappend in meta-qcom-distro will be used to enable the tflite
option.

Author: anujm1

conf/layer.conf

@@ -20,6 +20,8 @@ BBFILES_DYNAMIC += " \
     openembedded-layer:${LAYERDIR}/dynamic-layers/openembedded-layer/*/*/*.bbappend \
     networking-layer:${LAYERDIR}/dynamic-layers/networking-layer/*/*/*.bb \
     networking-layer:${LAYERDIR}/dynamic-layers/networking-layer/*/*/*.bbappend \
+    qcom-distro:${LAYERDIR}/dynamic-layers/qcom-distro/*/*/*.bb \
+    qcom-distro:${LAYERDIR}/dynamic-layers/qcom-distro/*/*/*.bbappend \
     selinux:${LAYERDIR}/dynamic-layers/selinux/*/*/*.bb \
     selinux:${LAYERDIR}/dynamic-layers/selinux/*/*/*.bbappend \
 "

dynamic-layers/qcom-distro/recipes-multimedia/imsdk/gst-plugins-imsdk_%.bbappend

@@ -0,0 +1,2 @@
+# Dependency recipe for tflite, tensorflow-lite, is provided by the meta-qcom-distro layer.
+PACKAGECONFIG:append = " tflite"

recipes-multimedia/imsdk/gst-plugins-imsdk_git.bb

@@ -36,4 +36,8 @@ PACKAGECONFIG[ml]           = "-DENABLE_GST_ML_PLUGINS=1, -DENABLE_GST_ML_PLUGIN
 PACKAGECONFIG[qmmfsrc]      = "-DENABLE_GST_PLUGIN_QMMFSRC=1  -DVHDR_MODES_ENABLE=ON, -DENABLE_GST_PLUGIN_QMMFSRC=0 -DVHDR_MODES_ENABLE=OFF, camera-service"
 PACKAGECONFIG[redissink]    = "-DENABLE_GST_PLUGIN_REDISSINK=1, -DENABLE_GST_PLUGIN_REDISSINK=0, hiredis"
 PACKAGECONFIG[sw]           = "-DENABLE_GST_SOFTWARE_PLUGINS=1, -DENABLE_GST_SOFTWARE_PLUGINS=0, gstreamer1.0-rtsp-server smart-venc-ctrl-algo"
+PACKAGECONFIG[tflite]       = "-DENABLE_GST_PLUGIN_MLTFLITE=1, -DENABLE_GST_PLUGIN_MLTFLITE=0, tensorflow-lite"
 PACKAGECONFIG[videoproc]    = "-DENABLE_GST_VIDEOPROC_PLUGINS=1, -DENABLE_GST_VIDEOPROC_PLUGINS=0, cairo"
+
+# The TFLite plugin loads the TensorFlow Lite library at runtime using dlopen(). To ensure runtime availability, added runtime dependency on 'tensorflow-lite'.
+RDEPENDS:${PN}-qtimltflite += "tensorflow-lite"