starboard/contrib/creator directory contains port of Cobalt for Creator CI20 platform: https://www.elinux.org/MIPS_Creator_CI20
Cobalt can be built for CI20 using LLVM toolchain (Clang and lld), or GCC 4.9 toolchain. In both cases sysroot based on Debian Jessie is needed.
Directory third_party/ci20 contains script mipsel-toolchain-sysroot-creator.sh, which will create Debian Jessie based sysroot. In addition this script will also build GCC toolchain.
In order to create sysroot and toolchain run:
Result will be a package, mipsel_toolchain_sysroot.tgz, which will contain sysroot and GCC toolchain.
Directory where this package is extracted should be exported as CI20_HOME.
Follow all generic instructions from:
Clang is the default toolchain for building Cobalt for CI20. Configuration files are located in creator/ci20x11.
Commands for building are:
cobalt/build/gyp_cobalt -C debug creator-ci20x11 ninja -j4 -C out/creator-ci20x11_debug all cobalt/build/gyp_cobalt -C devel creator-ci20x11 ninja -j4 -C out/creator-ci20x11_devel all cobalt/build/gyp_cobalt -C qa creator-ci20x11 ninja -j4 -C out/creator-ci20x11_qa cobalt cobalt/build/gyp_cobalt -C gold creator-ci20x11 ninja -j4 -C out/creator-ci20x11_gold cobalt
cobalt/build/gyp_cobalt -C debug creator-ci20x11-mozjs ninja -j4 -C out/creator-ci20x11-mozjs_debug all cobalt/build/gyp_cobalt -C devel creator-ci20x11-mozjs ninja -j4 -C out/creator-ci20x11-mozjs_devel all cobalt/build/gyp_cobalt -C qa creator-ci20x11-mozjs ninja -j4 -C out/creator-ci20x11-mozjs_qa cobalt cobalt/build/gyp_cobalt -C gold creator-ci20x11-mozjs ninja -j4 -C out/creator-ci20x11-mozjs_gold cobalt
Configuration files for GCC build are located in creator/ci20x11/gcc/4.9
Commands for building are:
cobalt/build/gyp_cobalt -C debug creator-ci20x11-gcc-4-9 ninja -j4 -C out/creator-ci20x11-gcc-4-9_debug all cobalt/build/gyp_cobalt -C devel creator-ci20x11-gcc-4-9 ninja -j4 -C out/creator-ci20x11-gcc-4-9_devel all cobalt/build/gyp_cobalt -C qa creator-ci20x11-gcc-4-9 ninja -j4 -C out/creator-ci20x11-gcc-4-9_qa cobalt cobalt/build/gyp_cobalt -C gold creator-ci20x11-gcc-4-9 ninja -j4 -C out/creator-ci20x11-gcc-4-9_gold cobalt
Cobalt might complain about missing libraries on CI20 platform with stock Debian rootfs.
To check which libraries are missing, run:
And install missing libraries using apt-get.
Before running Cobalt on CI20, pulseaudio must be disabled.
a) Global config (all users): edit /etc/pulse/client.conf or b) Local config (single user): edit ~/.config/pulse/client.conf
Add following new line to client.conf: autospawn = no
To start Cobalt on CI20, mount “out” directory on platform and run:
cd out/creator-ci20x11_gold ./cobalt
By default Cobalt will open youtube.com/tv page.
With pulseaudio disabled, audio on youtube.com/tv is working OK, with occasional audible artifacts.
Since CI20 still uses software video decoding, video performance is not good. Video playback will start, but most of the frames will be dropped.