Does anyone happen to know where in the Chromium code base the implementation is hiding? The android version seems to use a library that's part of Google Play

Does anyone happen to know where in the Chromium code base the implementation is hiding? The android version seems to use a library that's part of Google Play Services: /** * Implementation of mojo BarcodeDetection, using Google Play Services vision package. */ and // The vision library will be downloaded the first time the API is used // on the device; this happens "fast", but it might have not completed, // bail in this case. Also, the API was disabled between and v.9.0 and // v.9.2, see https://developers.google.com/android/guides/releases. From: https://github.com/chromium/chromium/blob/c4d3c31083a2e1481253ff2d24298a1dfe19c754/services/shape_detection/android/java/src/org/chromium/shape_detection/BarcodeDetectionImpl.java https://github.com/chromium/chromium/blob/c4d3c31083a2e14812... The desktop version references a third party library called "barhopper" here: https://github.com/chromium/chromium/blob/e1e495b29e1178a451f65980a6c4ae017c34dc94/services/shape_detection/barcode_detection_impl_barhopper.cc https://github.com/chromium/chromium/blob/e1e495b29e1178a451... and barhopper seems to come from a non-public Google repo: 'src/third_party/barhopper': { 'url': 'https://chrome-internal.googlesource.com/chrome/deps/barhopper.git' + '@' + 'ad3c4382875afdd0340f1549f8b9c93cbbc16e37', 'condition': 'checkout_src_internal and checkout_chromeos', }, from https://source.chromium.org/chromium/chromium/src/+/master:DEPS https://source.chromium.org/chromium/chromium/src/+/master:D... I didn't realize that Chromium had missing APIs compared to Chrome but maybe that's always been the case? This appears not to be a W3C standard: https://wicg.github.io/shape-detection-api/ https://wicg.github.io/shape-detection-api/ I was interested in this because there are no really good open source DataMatrix decoders (to my knowledge) with the one in ZXing being basically unusable (last I checked) and libdtmx being ok but not comparable to commercial offerings.