ossia / score / 35742451820
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jcelerier 
gfx: name DirectShow camera formats by codec, and widen the subtypes

A compressed pin carries no pixel format, so CameraSettings holds
AV_PIX_FMT_NONE for it and av_get_pix_fmt_name answers nullptr. The device
list's description built its name from that with only MJPEG special-cased,
which left every other compressed codec assigning a null pointer to a
std::string. Gfx::cameraFormatName names a format from its codec when it has
no layout and from its layout otherwise, and neither lookup is used
unchecked.

The compressed half of the subtype decision now goes to the fourcc -> codec
table FFmpeg maintains for RIFF/AVI, which is what ffmpeg's own dshow device
resolves a pin through, rather than the six-entry list it replaces. H.264's
eight spellings, DV's five, VP8/VP9/AV1, MPEG-4/DIVX/Xvid, H.263, JPEG 2000,
v210 and the lossless card codecs all arrive from there. The layout table is
consulted first, so a fourcc it names stays raw even where that table calls
it a codec -- Y41P, which we unpack.

What that table lacks and DirectShow emits is listed alongside it: H.265 in
both spellings in the wild (UVC cameras label the pin 'H265', OBS and the LAV
filters 'HEVC'), the CFCC/IJPG/TVMJ/WAKE/Plum Motion-JPEG fourccs from
dshow.h, and MDVF. A camera whose only pin is H.265 had no format to offer
at all.

The raw table gains the aliases FFmpeg's own raw table carries, so a pin
spelt any of them resolves to the layout we offer it under: HDYC (the UYVY
capture cards present), the other packed 4:2:2 spellings, the planar AVI
ones, YUV9, Y411 and 'Y16 '.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QnTb3Zd2ctRWoTs5wMtoiC

51 of 52 new or added lines in 3 files covered. (98.08%)

8408 existing lines in 137 files now uncovered.

119310 of 295781 relevant lines covered (40.34%)

112391.58 hits per line

Uncovered Changes

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88.89
 src/plugins/score-plugin-gfx/Gfx/CameraFormatName.hpp

Coverage Regressions

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 2.21% src/plugins/score-plugin-gfx/Gfx/Graph/RenderedCSFNode.cpp
603
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 -0.59% src/plugins/score-plugin-gfx/Gfx/Graph/RenderedRawRasterPipelineNode.cpp
398
71.51
 3.48% src/addons/score-addon-deuterium/Deuterium/GigSampler/GigLoader.cpp
355
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 -1.35% src/plugins/score-lib-process/Process/Dataflow/ControlWidgets.hpp
315
0.0
 0.0% src/plugins/score-plugin-gfx/tests/EncoderTester.cpp
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 -5.18% src/plugins/score-plugin-deviceexplorer/Explorer/Explorer/Widgets/DeviceEditDialog.cpp
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 -0.01% src/plugins/score-plugin-gfx/Gfx/Pipewire/PipewireOutputDevice.cpp
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Jobs
ID Job ID Ran Files Coverage
1 35742451820.1 3524
40.34
 GitHub Action Run
Source Files on build 35742451820