Decrypt can emit a raw FLAC stream; the AC-4 repair step fed it to the
MP4 box parser, which failed with a garbage atom type whose control
bytes then broke the unescaped Kotlin error JSON (FormatException in
Dart). Guard the repair call by extension, sniff the box type in Go as
a second layer, and build platform error JSON with JSONObject.quote.
go-flac's Save(samePath) rewrites the file in place by shifting the audio
body within the same inode, so a process kill or power loss mid-save
destroyed the file with no recovery copy. All tag writers now stream to a
sibling temp, fsync, and rename over the target, so an interruption leaves
either the old intact file or the new complete one. The M4A freeform and
AC-4 whole-file rewrites get the same treatment, and the WAV/AIFF writer
gains the missing fsync before its rename.
gofmt -r rewrite of all 506 interface{} occurrences to the any alias
(identical semantics), drop unused spec constants into comments, rename
unused parameters to _, convert three if-else chains to tagged
switches, and use slices.ContainsFunc for the private-IP check. No
behavior change; the whole package is now gofmt-clean.
Validate audio sample entry header bounds before QuickTime v1
normalization and dac4 injection so malformed MP4 trees are left
unchanged or rejected instead of panicking on truncated boxes.
Decrypt AC-4 via the FFmpeg mov muxer with a -f mov fallback, then repair the output to a standards-compliant ISO MP4: inject the dac4 config box from the encrypted source, normalize the QuickTime container/sample entry, and write iTunes metadata (incl. cover and lyrics) natively. Codec-keyed and generic, so it applies to any extension that returns AC-4 streams. Wired through PlatformBridge/MainActivity for both SAF and local decrypt paths.
zarzet