Change #286098

Comments

avcodec/bsf: add jpegapp to inject JPEG APP segments
Inject APP0..APP15 segments from a length-prefixed sidecar into each
MJPEG packet after SOI. A zero-length record passes the packet through.
An APP1-only payload retains the existing APP0; a payload starting with
APP0 replaces an APP0 located immediately after SOI.

Consume records in packet arrival order, with a 16 MiB record limit.
Missing or invalid records return an error. Remember sidecar read and
validation errors so later packets cannot consume a rejected record's
payload as metadata. Flushing neither rewinds the sidecar nor clears
this error; closing the context does not read ahead.

Count every consumed input packet in diagnostics, distinguish I/O errors
from truncated records, include the open error text for a sidecar that
cannot be opened, and document the sidecar and lifecycle contract.

Co-authored-by: Cursor <cursoragent@cursor.com>
Signed-off-by: Reinhard Nißl <rnissl@gmx.de>
Assisted-by: Fairy

Changed files

• Changelog
• doc/bitstream_filters.texi
• libavcodec/bitstream_filters.c
• libavcodec/bsf/Makefile
• libavcodec/bsf/jpegapp.c