Comments (4)
stapelberg
commented on June 7, 2024
This is the stack trace of where the (first) error occurs:
log.Panicf({0x4b72eb?, 0x17?}, {0xc00011abc0?, 0x493d4b?, 0xc0006c4000?})
/home/michael/sdk/go1.18/src/log/log.go:392 +0x67
github.com/stapelberg/scan2drive/internal/stdjpeg.(*decoder).readByteStuffedByte(0xc0006c4000?)
/home/michael/go/src/github.com/stapelberg/scan2drive/internal/stdjpeg/reader.go:219 +0xf8
github.com/stapelberg/scan2drive/internal/stdjpeg.(*decoder).ensureNBits(0xc0006c4000, 0x8)
/home/michael/go/src/github.com/stapelberg/scan2drive/internal/stdjpeg/huffman.go:50 +0x2b
github.com/stapelberg/scan2drive/internal/stdjpeg.(*decoder).decodeHuffman(0xc0006c4000, 0xc0006c6060)
/home/michael/go/src/github.com/stapelberg/scan2drive/internal/stdjpeg/huffman.go:184 +0x45
github.com/stapelberg/scan2drive/internal/stdjpeg.(*decoder).processSOS(0xc0006c4000, 0xa)
/home/michael/go/src/github.com/stapelberg/scan2drive/internal/stdjpeg/scan.go:254 +0xd7d
github.com/stapelberg/scan2drive/internal/stdjpeg.(*decoder).decode(0xc0006c4000, {0x4d57e0?, 0xc0001201b0?}, 0x0)
/home/michael/go/src/github.com/stapelberg/scan2drive/internal/stdjpeg/reader.go:632 +0x19b
github.com/stapelberg/scan2drive/internal/stdjpeg.Decode(...)
/home/michael/go/src/github.com/stapelberg/scan2drive/internal/stdjpeg/reader.go:781
main.incompat()
/home/michael/go/src/github.com/stapelberg/scan2drive/_incompat/incompat.go:18 +0xf2
main.main()
/home/michael/go/src/github.com/stapelberg/scan2drive/_incompat/incompat.go:28 +0x19
exit status 2
Compilation exited abnormally with code 1 at Sat Apr 16 14:21:40
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stapelberg
commented on June 7, 2024
When encoding a 4960x16 image file of all-red pixels, the entropy-coded segment differs in an additional 2 bytes:
--- scan2drive/internal/neonjpeg 2022-04-16 16:31:38.979975747 +0200
+++ image/jpeg 2022-04-16 16:31:38.983309143 +0200
@@ -39,5 +39,5 @@
00000260 e8 a2 8a f9 93 f7 10 a2 8a 28 00 a2 8a 28 00 a2 |.........(...(..|
00000270 8a 28 00 a2 8a 28 00 a2 8a 28 00 a2 8a 28 00 a2 |.(...(...(...(..|
*
-00000730 8a 28 00 a2 8a 28 00 a2 8a ff d9 |.(...(.....|
-0000073b
+00000730 8a 28 00 a2 8a 28 00 a2 8a 28 03 ff d9 |.(...(...(...|
+0000073d
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stapelberg
commented on June 7, 2024
While the above fixes fix some of the issues, there are still others that are harder to diagnose.
Perhaps linking against turbojpeg using cgo is preferable after all (behind a build tag), even if it means that building the optimized version becomes significantly harder (you’ll need aarch64-linux-gnu-gcc installed, and an arm64 version of libturbojpeg.a).
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stapelberg
commented on June 7, 2024
Preliminary results on a Raspberry Pi 4:
- 1.88s using neonjpeg
- 1.36s using turbojpeg, encoding 1 scanline at a time
- 1.24s using turbojpeg, encoding 16 scanlines at a time
Unfortunately, neither https://github.com/pixiv/go-libjpeg nor https://github.com/bmharper/turbo support a streaming API, so we’ll need a custom fork (temporarily at least).
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Related Issues (20)
- race condition: setup mode redirect might run into transient HTTP 404
- main.go:846: undefined: s HOT 2
- add zoom function to scan thumbnails
- fix UI-driven scanning/renaming HOT 5
- Add upspin server availing scans HOT 1
- create thumbnails asynchronously for button-triggered scans HOT 1
- Which scanners does it support? HOT 2
- eSCL (“AirScan”) support HOT 1
- Consider supporting other authentication providers and sinks
- scan2drive.zekjur.net https listener is currently hardcoded in the source HOT 1
- scan2drive doesn't append DNSSD Domain to scanner service for Avahi-style name resolution HOT 1
- Update Google Drive Libraries HOT 5
- Listen address/oauth redirect trouble HOT 3
- Support airscan-only operation on MacOS? HOT 3
- investigate using machine learning for OCR
- gokr-packer exiting with status 2 after `*grpc.ClientConn has no field or method State` HOT 1
- Investigate using ARM NEON instructions to speed up image processing HOT 6
- Unify internal/g3 with image/jpeg/writer.go
- Unable to read client secret file: open /perm/client_secret_... HOT 21
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