Add AudioPlayoutStats interface #2645
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hoch
requested changes
Sep 17, 2025
From @hoch Co-authored-by: Hongchan Choi <[email protected]>
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Implemented your comments and wrapped the lines at 80 (except where it would have cut through a link, which seems to be the standard for the rest of the document), thanks! |
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@padenot Could you take a look? |
| 1. Set {{[[underrun duration]]}} to the total duration of all | ||
| [=underrun frames=] (in seconds) that | ||
| {{[[audio context]]}} has played since its construction. | ||
| 1. Set {{[[underrun events]]}} to the number of times that {{[[audio context]]}} |
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I'm curious if this design holds up to distinguish these three cases
- occasional spike
- consistent overload -> consistent underruns (every quantum processed)
- periodic overload. as an example, a misaligned block based computation that ends up processing every N frames
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Hi!
- An occasional spike will manifest as a single increase in
underrunDuration, and an increase inunderrunEventsby 1. - Consistent underruns will manifest as many small increases in
underrunDuration, and many increases inunderrunEvents. - Similar to 1, but periodic. Since the API updates at most once per second (for privacy reasons), this might not be possible to immediately detect if N is small enough that we get several underruns per second. If N is large, it should be possible to see that the underruns occur at regular intervals. Also (if my math is correct)
underrunEvents / currentTimeshould converge steadily towardssampleRate / N, so you could also look for that.
Co-authored-by: Christoph Guttandin <[email protected]>
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Integrates the Playout Statistics API for WebAudio spec into the WebAudio spec.
The following changes are made between the version incubated in WICG and this PR:
Related issue: #2642
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