Missing riscv64 builds for libdepthengine, frameprocessor, filters and firmwareupdater extensions

[ByteBlake]

Description

I am trying to use OrbbecSDK v2.8.6 on a Linux RISC-V 64 platform.

The open-source part of OrbbecSDK can be built on my platform, but the required extension libraries do not appear to have RISC-V 64 builds.

The extension directory contains the following libraries:

extensions/
├── depthengine
│   ├── libdepthengine.so -> libdepthengine.so.2.0
│   └── libdepthengine.so.2.0
├── filters
│   ├── libFilterProcessor.so
│   └── libob_priv_filter.so
├── firmwareupdater
│   └── libfirmwareupdater.so
└── frameprocessor
    └── libob_frame_processor.so

These libraries are not available for the riscv64 architecture.

When running depth-related examples without a compatible frame-processing extension, the SDK may also report:

Error: Device Component 'depth frame processor' not found!

The architecture of the provided libraries can be checked with:

file extensions/depthengine/libdepthengine.so.2.0
file extensions/filters/libFilterProcessor.so
file extensions/filters/libob_priv_filter.so
file extensions/firmwareupdater/libfirmwareupdater.so
file extensions/frameprocessor/libob_frame_processor.so

readelf -h extensions/frameprocessor/libob_frame_processor.so

None of the official release packages currently appear to provide RISC-V 64 versions of these extension libraries.

Reproduction Steps

git clone https://github.com/orbbec/OrbbecSDK_v2.git
cd OrbbecSDK_v2
git checkout v2.8.6

Install udev first.

Disable -mssse3 in linux_config.cmake.

if(NOT OB_BUILD_LINUX_ARM)
    # When the compiler (e.g., gcc or g++) is given the flag -mssse3,
    # it automatically defines the macro __SSSE3__=1.
    message("Linux set sse3")
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}   -mssse3")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}  -mssse3")
endif()

mkdir build && cd build
cmake -D CMAKE_BUILD_TYPE=Release \
-D CMAKE_INSTALL_PREFIX=./install \
..

cmake --build . -- -j8
cmake --install .

cd ./install/bin
./ob_depth_c

Environment

• Board: SpacemiT K1 development board
• CPU architecture: RISC-V 64-bit (riscv64)
• Operating system: Ubuntu 24.04
• Kernel: 6.6.63
• OrbbecSDK version: v2.8.6
• Camera model: Gemini 2L>
• Compiler: gcc13
• Build type: Native build on the RISC-V board

Architecture information:

root@k1:~# uname -a
Linux k1 6.6.63 #2.2.0.2 SMP PREEMPT Wed Apr 30 09:37:16 UTC 2025 riscv64 riscv64 riscv64 GNU/Linux

root@k1:~# uname -m
riscv64

Questions

1. Is Linux RISC-V 64 support planned for OrbbecSDK v2?
2. Can Orbbec provide RISC-V 64 builds of these extension libraries?
3. Is it possible to build these libraries from source?
4. Which camera functions will be unavailable if each extension is missing?
5. Is there a supported configuration for using basic color and depth streams without the proprietary extensions?

I am willing to test RISC-V 64 builds on the SpacemiT K1 platform and provide build logs, runtime logs, and performance results.