Files
FFmpeg/libavutil
Marcos Ashton Iglesias bc4cbbb85f avutil/hdr_dynamic_metadata: fix from_t35 NULL return and version doc
av_dynamic_hdr_plus_from_t35() returned AVERROR(ENOMEM) when passed a
NULL AVDynamicHDRPlus. A NULL output struct is invalid API usage by the
caller, not an allocation failure, and nothing is allocated on that
path. av_dynamic_hdr_smpte2094_app5_from_t35() already returns
AVERROR(EINVAL) for the same condition; make the two parsers agree.

The documentation for AVDynamicHDRPlus.application_version said the
value shall be set to 0, which contradicts both sides of the
implementation: av_dynamic_hdr_plus_to_t35() ignores the field and
always writes 1, the value CTA-861-H specifies for the HDR10+ payload,
and av_dynamic_hdr_plus_from_t35() sets the field from the parsed
payload rather than validating it against 0. No FFmpeg code assigns
this field, so document the contract the implementation provides.

Signed-off-by: marcos ashton <marcosashiglesias@gmail.com>
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