feat(player): SABR playback (chunk-based, seekable)#47

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InfinityLoop1308:devfrom

Priveetee:feat/sabr-client

Commits on Jun 19, 2026

feat(player): SABR PO token via headless WebView
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feat(player): SABR session store and format selection
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feat(player): SABR pump and datasource (reader-driven)
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feat(player): wire SABR into the player, resolver and load control
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fix(sabr): cap cached sessions to 2 to stop the cross-video black screen
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feat(sabr): per-segment data source for the chunk-based source (tier2)
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feat(sabr): seekable chunk-based MediaSource core (tier2)
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feat(sabr): wire chunk MediaSource into the resolver (tier2 wip)
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feat(sabr): self-contained webm/mp4 chunks, playback works (tier2)
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fix(sabr): track reader position so playback and seek keep feeding (tier2)
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chore(sabr): drop tier2 debug logging
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feat(sabr): respect the user-selected video quality and force AAC audio
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perf(sabr): persist the PO token on disk and harden the mint timeout/retry
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fix(sabr): ignore ended tracks when reporting the buffered position
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fix(sabr): time segment stalls per-request so a throttled pump can't false-stall
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chore(sabr): remove the dead v1 byte-stream data source
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fix(sabr): adapt LoadControl and ChunkSampleStream to the media3 1.10 APIs
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docs(sabr): clarify the AAC-over-Opus comment, separate the pump false-stall
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fix(sabr): rebuild the session when the user changes video quality/codec
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fix(sabr): keep a 30s back-buffer so short backward seeks land in cache
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fix(sabr): re-fetch evicted segments on a backward seek past the back-buffer
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fix(sabr): fall back to a decodable codec at the chosen resolution, not the highest
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fix(sabr): shrink the back-buffer when the cache is over budget so eviction can drain
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fix(sabr): serve cold/forward seeks and rewind-after-end in the stream pump
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fix(sabr): re-enable the video track on the live source when returning from background
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fix(player): recover from surface-released decoder failures instead of crashing
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fix(sabr): play the original audio track instead of the auto-dub
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fix(detail): stop reloading related videos on every resume
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feat(player): SABR multi-language audio track selector (show + switch)
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fix(player): keep the playback position when switching the SABR audio track
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fix(sabr): pre-load init metadata on cold-restore to avoid an audio discontinuity
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fix(player): guard NaN aspect ratio in ExpandableSurfaceView
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fix(player): keep the SABR position on quality change and error recovery
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feat(sabr): stream the SABR POST response without buffering the whole body
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fix(sabr): size the back-buffer by bytes so 4k keeps its read-ahead budget
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