This document records all notable changes made to Cobalt since the last release.
Introduce C++11
C++11 is now used within Cobalt code, and so Cobalt must be compiled using C++11 toolchains.
Update SpiderMonkey from version 24 to 45; support ECMAScript 6
The Mozilla SpiderMonkey JavaScript engine is rebased up to version 45, and thus ECMAScript 6 is now supported by Cobalt. You will need to modify your gyp_configuration.gypi
file to set 'javascript_engine': 'mozjs-45'
to enable this.
Fetch/Stream API
Cobalt now supports the Fetch/Stream API.
On-device Speech-to-Text support
Support for utilizing the new Starboard speech recognizer interface in order to allow for on-device speech-to-text support is now added. The Starboard interface is defined in starboard/speech_recognizer.h.
Mouse pointer support
Cobalt now supports pointer events and will respond to Starboard kSbInputEventTypeMove
events. These will be passed into the WebModule to be processed by JavaScript.
Playback Rate
Cobalt now supports adjusting the video playback rate.
AutoMem - Memory Configuration
AutoMem has been added which assists developers in tuning the memory settings of the Cobalt app. On startup, memory settings are now printed for all builds except gold. Memory settings can be altered via the command line, build files and in some instances the Starboard API. For more information, see cobalt/doc/memory_tuning.md.
Page Visibility API Support
Cobalt now supports the page visibility API, and will signal visibility and focus changes to the web app as the process transitions between Starboard lifecycle states.
Opus Support
Added support for providing Opus audio-specific config to Starboard. Requires Starboard 6.
Linux build now supports 360 video
The Linux build linux-x64x11 now supports 360 video, and can be used as a reference implementation.
Stop the application if not retrying after a connection error
A positive response from kSbSystemPlatformErrorTypeConnectionError
now indicates that Cobalt should retry the failed request. Any other response now causes Cobalt to call SbSystemRequestStop
.
Frame rate counter
A frame rate counter is now made accessible. It actually displays frame times, the inverse of frame rate. In this case, 16.6ms corresponds to 60fps. It is accessible both as an overlay on the display by the command line option, “--fps_overlay”. The data can also be printed to stdout with the command line option “--fps_stdout”. The frame rate statistics will be updated each time an animation ends, or after 60 frames have been processed. Both command line flags are available in Gold builds.