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Decoder IFD access #412

Merged
merged 7 commits into from
Mar 7, 2024
Merged

Decoder IFD access #412

merged 7 commits into from
Mar 7, 2024

Commits on Mar 7, 2024

  1. Add new DNG tags

    @cytrinox
    cytrinox committed Mar 7, 2024
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  2. Add UserComment and Makernotes EXIF tags to Exif struct

    @cytrinox
    cytrinox committed Mar 7, 2024
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  3. Fix new clippy warnings

    @cytrinox
    cytrinox committed Mar 7, 2024
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  4. Add FormatHint and Decoder::format_hint()

    @cytrinox
    cytrinox committed Mar 7, 2024
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  5. Add WellKnownIFD and Decoder::ifd() to access raw file IFDs 

    For example, if you know you're dealing with DNG raw files
(Decoder::format_hint) and want to extract OpcodeList3, you can access
the raw IFD with decoder.ifd(WellKnownIFD::Raw) and query this IFD
for DngTag::OpcodeList3 entry.

There are also virtual IFDs. Decoders can provide collections of useful
tags as virtual IFDs like format specific tags that are difficult to
read manually.

This commit introduces two virtual IFDs:
 * VirtualDngRootTags
 * VirtualDngRawTags

These IFDs can be used by any decoder implementation to pass-through
DNG tags to dng-writer. This is useful if a raw file format provides
information that can be used to populate DNG tags.

Decoder::ifd() is implemented only for DNG decoder yet but it's easy
to extend it to all other decoders.
    @cytrinox
    cytrinox committed Mar 7, 2024
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  6. Remove Makernotes from Exif as it is unusable 

    Some cameras embed the raw data inside Makernotes and as Exif
struct is part of analyze metadata during test cases, it would
serialize the whole pixels into yaml files.
    @cytrinox
    cytrinox committed Mar 7, 2024
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  7. Update analyze test files

    @cytrinox
    cytrinox committed Mar 7, 2024
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