* Package name    : libultrahdr
  Version         : 2.0.2
  Upstream Contact: Vincent Rabaud <vrabaud@google.com>
* URL             : https://github.com/google/libultrahdr
* License         : Apache-2.0 or MIT
  Programming Lang: C++
  Description     : libultrahdr HDR gain map library

libultrahdr is an image compression library that uses gain map technology
to store and distribute HDR images.

This package would be needed to process or display photos from most
modern phones in the last years without losing significant luminosity
data. Recent desktop environments support displaying HDR content, but
applications are somewhat lacking in supporting other than videos.

I am using this for test purposes on my own computer to display personal
photos from the last 3-4 years.

As an example Google enabled Ultra HDR by default on all Pixel phones,
Pixel 5 and newer, to record gain map data in late 2023, so all photos taken
after that rollout should include the data, unless modified with software
that drops the data. Samsung devices call it Super HDR, Apple calls it
Adaptive HDR, and there is ISO 21496-1 standardizing it.

I'll be uploading it on my own, but all my packages are LowNMU and it can
be freely moved to be part of some team.

This is an automated message from the Debian DFSG, Licensing & New
Packages Team.

The Debian NEW review of libultrahdr 2.0.2-1 has been completed.

Decision: ACCEPTED
Reviewer: Andrew McMillan

Review comment:

Hi,

A couple of issues you should fix in your next upload...

1. [important] packaging libheif-dev not in Build-Depends: HEIF/AVIF support silently disabled

Files: debian/control (Build-Depends); CMakeLists.txt:648-744; debian/ultrahdr_app.1 (-z option)
Evidence: option_if_not_defined(UHDR_ENABLE_HEIF "Build with HEIF/AVIF support via libheif" TRUE) then find_package(libheif QUIET) … message(WARNING "libheif not found. Building without HEIF/AVIF support.") set(UHDR_ENABLE_HEIF FALSE); heifultrahdr.cpp/avifultrahdr.cpp are whole-file #ifdef UHDR_ENABLE_HEIF; docs/api_changes_v1.5_to_v2.0.md: “When disabled: libultrahdr builds as a standalone, zero-dependency JPEG-only library”. Build-Depends has no libheif-dev, so a clean sbuild gets the JPEG-only fallback.
Problem: The shipped libuhdr.so and ultrahdr_app lose HEIF/HEIC/AVIF encode/decode although the library’s man page documents .heic/.heif/.avif output selection and upstream enables this by default; callers calling HEIF/AVIF API modes will get errors at runtime. The degradation is silent and undocumented.
Fix: Add libheif-dev to Build-Depends (libheif 1.23.4 in unstable provides the ISO 21496-1 gain-map API that Findlibheif.cmake checks; the runtime shlibs:Depends on libheif1 follows automatically), and verify the build; if a deliberate JPEG-only build is intended instead, document it in debian/control, the changelog and the man page.

2. [minor] licensing cmake/patches/libheif_pr1503.patch is libheif (LGPL-3.0-or-later) code but only covered by the Apache-2.0 or MIT catch-all

Files: debian/copyright Files: * stanza; cmake/patches/libheif_pr1503.patch
Evidence: The patch is a verbatim diff of the libheif project (paths libheif/CMakeLists.txt, libheif/api/libheif/heif.cc, heifio) adding the gain-map API; libheif is LGPL-3.0-or-later. It has no license header of its own and falls under Files: * with Copyright 2022-2026 The Android Open Source Project, License: Apache-2.0 or MIT, which misstates its provenance and licence.
Problem: debian/copyright should reflect that a file is third-party libheif content under its own licence rather than the project’s dual licence; the file is inert in the Debian build (UHDR_BUILD_DEPS is off) so this is documentation-only, not a DFSG issue.
Fix: Add a Files: cmake/patches/libheif_pr1503.patch stanza attributing it to the libheif project / its author under LGPL-3.0-or-later (with the licence text), or note the provenance in the existing catch-all.


Thanks!

Full review details: https://dfsg-new-queue.debian.org/reviews/libultrahdr

We believe that the bug you reported is fixed in the latest version of
libultrahdr, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1147334@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Timo Jyrinki <timo@debian.org> (supplier of updated libultrahdr package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Thu, 17 Sep 2026 16:58:20 +0300
Source: libultrahdr
Binary: libuhdr-bin libuhdr-bin-dbgsym libuhdr-dev libuhdr2 libuhdr2-dbgsym
Architecture: source amd64
Version: 2.0.2-1
Distribution: unstable
Urgency: medium
Maintainer: Timo Jyrinki <timo@debian.org>
Changed-By: Timo Jyrinki <timo@debian.org>
Description:
 libuhdr-bin - libultrahdr HDR gain map library - binary utilities
 libuhdr-dev - libultrahdr HDR gain map library - development files
 libuhdr2   - libultrahdr HDR gain map library
Closes: 1147334
Changes:
 libultrahdr (2.0.2-1) unstable; urgency=medium
 .
   * Initial release. (Closes: #1147334)
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Files:
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