Turning subtitles off (or hiding them) while an ASS/SSA cue was on screen left
that cue painted until its natural end time on the ExoPlayer backend: AssHandler
nulls the libass track, after which every render returns null, no payload ever
reaches the GL thread again, and the overlay keeps its last swapped atlas. The
existing invalidateSubtitles() call from the #1387 fix could never repaint it.
The atlas pipeline now detects a trackless render request and hands the GL
thread one zero-quad payload, which clears and swaps a transparent frame. The
clear is keyed on the renderer state generation so one dropped as stale is
retried, and it self-heals from per-video-frame requests while playing; the
existing invalidate on the disable transition covers the paused case.
close#1884
MKV files whose Tracks element follows media clusters could direct-play with audio but no video. Upgrade Media3 to 1.11.0 and cover the extractor regression.
close#1947
Signs built from hundreds of overlapping paint-stroke drawings (masked
smartphone screens and similar typesetting) sum to far more bitmap area
than the paged ALPHA_8 atlas can hold: the issue sample needs 5 pages of
16M px at 1080p and 19 at 4K against the 4-page cap, so the packer
dropped the painter-order tail - the sign's text and late mask strokes.
Move the packer out of the JNI file into AssPack.c (pure C, compilable
against a desktop libass for verification) and add a composite fallback:
when a frame can never fit MAX_ATLAS_PAGES pages or the vertex budget,
blend the image list CPU-side into one premultiplied RGBA rect over the
union bounding box - O(frame area) instead of O(sum of image areas) -
and draw it as a single quad through a new MODE_COMPOSITE path in the
GL renderer. Oversized composites reuse the existing grow-and-re-render
contract; the atlas fast path is byte-identical for every frame that fits.
Verified with a desktop harness compiling the shipped AssPack.c against
fork libass 0.18.3 and the issue sample: all atlas-mode frames byte-match
the previous packer, the sign's frames composite with zero truncation and
byte-match a reference full-frame blend at 1080p and 4K, and the
multi-page composite grow path round-trips.
close#1868
edde746