Files
LibreMediaConverter/app/src/test/java
JMR-devandClaude Opus 5 5ec2bba64b Check the MIME types Media3Engine hands Transformer, and the claim above them
Both tables decide what codec ends up in the user's file, and neither was
exercised. Point H265 at VIDEO_H264 and every hardware HEVC export writes
H.264 into a file the user asked to be H.265: Transformer does as told, the
export succeeds, and the only symptom is a codec nobody chose.

One arm carried an assertion rather than a value -- "Never reached: only an
Encode plan consults this, and COPY/NONE are not Encode" -- which is a claim
about callers parked in a branch of a callee. It is true, and nothing checked
it, so it would have gone on reading as true after it stopped being. Proved
instead: CopyPlanner answers both codecs before the Encode branch and its
fallback draws from ContainerCapabilities.encodableVideo, which contains
neither, so a sweep over every spec the planner can be handed asserts no
Encode plan carries COPY or NONE. Counters guard the sweep, because
`as? Encode ?: let` asserts nothing at all for a Drop or Copy plan.

The audio sibling claim did not survive intact. "MP3 and FLAC have no Android
encoder; the router routes them to FFmpeg" is true and incomplete: one rule,
`audioEncode !in MEDIA3_AUDIO`, diverts Vorbis by identical logic, so three of
the six encodable codecs never reach the table. VORBIS -> AUDIO_VORBIS is a
correct mapping for a request Transformer is never given. The arm stays -- a
right answer in unreachable code costs nothing -- and the comment now says so.

The tables are asked of the router's decisions rather than of its codec sets,
because the comments claim behaviour and a set can be right while the rule
reading it is wrong. Both move to an internal companion object so a JVM test
can reach them without constructing an engine, which would start a real
HandlerThread to answer an enum lookup; #57's precedent, and the JVM test
source set is a friend of main.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-24 22:43:05 -05:00
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