[CarGuo]

Updates the ARM64, ARMv7 and x86_64 libijkplayer.so copies in ex_so and the standalone modules to CarGuo/ijkplayer#2 (247dd7db9a59722137e586e7a1d077053e4b0a08). H.264 visible dimensions now propagate when MediaCodec reports an output-format change, including crop-only and one-axis changes.

The six player files retain their original modes. FFmpeg/SDL bytes, legacy ABIs and RTMP remain unchanged. The source, SHA-256 values and validation boundaries are recorded in doc/IJK_PR2_SO_UPDATE.md; experimental decoder-rebuild code is excluded.

Validation:

• Original PR sizing tests passed normal host compilation and ASan/UBSan execution.
• All nine supplied library hashes and unchanged dependency Git blobs matched; three-ABI ELF/SONAME/player exports/imports and alignment were checked.
• Fresh Redmi Android 13 ARM64 runs of these exact libraries completed H.264 and HEVC playback using c2.mtk.avc.decoder and c2.mtk.hevc.decoder (8.110 seconds each for eight-second clips). Earlier matching ARMv7 ordinary-playback and ARM64 cropped cold-start controls are retained in the validation record.
• git diff --check passed; both module layouts contain identical player bytes per ABI.

Device limit: the Redmi emits the initial format event but no later crop-change event for the dynamic fixture, so it cannot demonstrate the dynamic trigger fixed by this PR. Ordinary fresh runs did not collect PNG pixel acceptance. Prior emulator software-MediaCodec validation is producer-reported; its original A/B logs were not supplied or rerun here. This update makes no claim of universal dynamic-crop support or 16 KiB page-device runtime certification.

[Copilot]

🔵 Needs a closer look

Matching hashes do not establish build provenance or runtime behavior; the native builds were not independently reproduced, and exact-candidate dynamic-crop behavior remains unverified, requiring human review.

No open issues 🎉

What changed in this PR

This PR updates IJK player libraries to propagate H.264 visible dimensions when MediaCodec reports output-format changes. The reviewed documentation records the update’s provenance and validation limits, while distinguishing it from the v14 baseline build.

Changes:

• Documents source identity and player-library hashes for ARM64, ARMv7 and x86_64, with FFmpeg/SDL unchanged.
• Records static checks, playback results and device limitations, including the unverified dynamic-crop trigger.
• Adds notices to both build guides linking to the incremental update record.

File	Description
doc/​IJK_PR2_SO_UPDATE.md	Records update scope, provenance, hashes and validation boundaries.
doc/​BUILD_SO.md	Adds a Chinese notice distinguishing the player update from the baseline build.
doc/​BUILD_SO_EN.md	Adds the corresponding English notice and update-record link.

_{Review effort: Balanced}