Track HID report offsets per report ID#293
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hrvach merged 1 commit intohrvach:mainfrom Oct 31, 2025
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Per USB HID spec section 6.2.2.7, each report ID defines an independent report structure with its own bit offset tracking. Previously, offsets were reset when encountering a new report ID or at collection boundaries, causing incorrect parsing of descriptors with multiple reports. Changes: - Add report_offset_map_t to map report IDs to their offsets - Track offsets separately for each report ID in parser state - Remove incorrect offset resets on report ID change and collection end - Add helper functions for offset lookup and creation Local items still reset after Main items and Global items persist, matching spec requirements.
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Thank you so much for the work and patches, I'll test and merge as soon as I'm back from a work trip! |
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Based on my reading of the USB HID spec, each report ID defines an independent report structure with its own bit offset tracking. Previously, offsets were reset when encountering a new report ID or at collection boundaries, causing incorrect parsing of descriptors when the report ID swapped back and forth within the same descriptor.
Changes: