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Explainer https://github.com/WICG/web_audio_playout Specification https://webaudio.github.io/web-audio-api/#AudioPlaybackStats Summary This feature adds an AudioContext.playbackStats attribute which returns an AudioPlaybackStats object. This object provides audio playback statistics such as average latency, minimum/maximum latency, underrun duration, and underrun count. This API allows web applications to monitor audio playout quality and detect glitches. Note: This feature was previously tracked as AudioContext.playoutStats. It has been renamed to AudioContext.playbackStats to align with the final Web Audio API specification. The old name is supported as a deprecated alias for backward compatibility. Blink component Blink>WebAudio Web Feature ID web-audio Motivation There is currently no way to detect whether WebAudio playout has glitches (gaps in the played audio, which typically happens due to underperformance in the audio pipeline). There is an existing way to measure the instantaneous playout latency using AudioContext.outputLatency, but no simple way to measure average/minimum/maximum latency over time. With this API, we want to propose a way to be able to measure the delay of that audio and the glitchiness of the audio. Initial public proposal https://github.com/WICG/proposals/issues/142 TAG review Early TAG review request: https://github.com/w3ctag/design-reviews/issues/939 TAG review status Issues addressed Origin Trial Name Playout Statistics API for WebAudio Chromium Trial Name AudioContextPlayoutStats Origin Trial documentation link https://github.com/WICG/web_audio_playout WebFeature UseCounter name kAudioContextPlayoutStats Risks Interoperability and Compatibility No information provided Gecko: Positive (https://github.com/WebAudio/web-audio-api/pull/2645) The spec PR was reviewed and approved by a Mozilla engineer. WebKit: No signal Web developers: Positive (https://github.com/WICG/proposals/issues/142#issuecomment-1981012486) Other signals: WebView application risks Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications? None. Debuggability Can be tested by creating an AudioContext and evaluating context.playoutStats in the console. Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)? Yes Is this feature fully tested by web-platform-tests? Yes https://wpt.fyi/results/webaudio/the-audio-api/the-audiocontext-interface/audiocontext-playoutstats.html?label=experimental&label=master&aligned These will be updated if the API shape changes. Flag name on about://flags No information provided Finch feature name AudioContextPlayoutStats Rollout plan Will ship enabled for all users Requires code in //chrome? False Tracking bug https://g-issues.chromium.org/issues/475838360 Launch bug https://launch.corp.google.com/launch/4308993 Availability expectation Feature is available only in Chromium browsers for the foreseeable future. Adoption expectation Feature is used by specific partner(s) to provide functionality within 12 months of launch in Chrome. Adoption plan Nothing specific planned. Non-OSS dependencies Does the feature depend on any code or APIs outside the Chromium open source repository and its open-source dependencies to function? None. Estimated milestones Shipping on desktop 146 Origin trial desktop first 131 Origin trial desktop last 136 Origin trial extension 1 end milestone 145 Origin trial extension 2 end milestone 142 Origin trial extension 3 end milestone 139 DevTrial on desktop 129 Shipping on Android 146 Shipping on WebView 146 Anticipated spec changes Open questions about a feature may be a source of future web compat or interop issues. Please list open issues (eg links to known github issues in the project for the feature specification) whose resolution may introduce web compat/interop risk (eg, changing to naming or structure of the API in a non-backward-compatible way). None. Link to entry on the Chrome Platform Status https://chromestatus.com/feature/5172818344148992?gate=5078819495215104 Links to previous Intent discussions Intent to Prototype: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CACazmWW4MYVa_iGjN%3DK4O9B1DE3rt4_2Vkqnq6sKswHFjn6BzQ%40mail.gmail.com Intent to Experiment: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CACazmWWV6S6Ba%3Dd%3DgvjhERm1OnPyBMRJx5fbkP%3Df9zb3k%3DrNDA%40mail.gmail.com Intent to Extend Experiment 1: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/691455eb.2b0a0220.e30ce.7e1f.GAE%40google.com Intent to Extend Experiment 2: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/686d135c.2b0a0220.3a1521.0081.GAE%40google.com Intent to Extend Experiment 3: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CACazmWVkWb8DJM_aCRGOFpskBs-7h%3DO_yggKc3YBUkiieEO-UA%40mail.gmail.com This intent message was generated by Chrome Platform Status. -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/697ccdd6.050a0220.e1acf.031a.GAE%40google.com.
