KazukyAkayashi/m3_lightmeter
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log exif keys

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Vadim 2023-05-07 12:03:23 +02:00
parent b144cf7edb
commit 3e5587a365
1 changed files with 8 additions and 6 deletions
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14
lib/screens/metering/components/camera_container/bloc_container_camera.dart
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@ -1,6 +1,7 @@
import 'dart:async'; import 'dart:async';
import 'dart:developer';
import 'dart:io'; import 'dart:io';
import 'dart:math'; import 'dart:math' as math;
import 'dart:typed_data'; import 'dart:typed_data';
import 'package:camera/camera.dart'; import 'package:camera/camera.dart';
@ -123,7 +124,7 @@ class CameraContainerBloc extends EvSourceBlocBase<CameraContainerEvent, CameraC
_zoomRange = await Future.wait<double>([ _zoomRange = await Future.wait<double>([
_cameraController!.getMinZoomLevel(), _cameraController!.getMinZoomLevel(),
_cameraController!.getMaxZoomLevel(), _cameraController!.getMaxZoomLevel(),
]).then((levels) => RangeValues(levels[0], min(_maxZoom, levels[1]))); ]).then((levels) => RangeValues(levels[0], math.min(_maxZoom, levels[1])));
_currentZoom = _zoomRange!.start; _currentZoom = _zoomRange!.start;
_exposureOffsetRange = await Future.wait<double>([ _exposureOffsetRange = await Future.wait<double>([
@ -131,8 +132,8 @@ class CameraContainerBloc extends EvSourceBlocBase<CameraContainerEvent, CameraC
_cameraController!.getMaxExposureOffset(), _cameraController!.getMaxExposureOffset(),
]).then( ]).then(
(levels) => RangeValues( (levels) => RangeValues(
max(_exposureMaxRange.start, levels[0]), math.max(_exposureMaxRange.start, levels[0]),
min(_exposureMaxRange.end, levels[1]), math.min(_exposureMaxRange.end, levels[1]),
), ),
); );
await _cameraController!.getExposureOffsetStepSize().then((value) { await _cameraController!.getExposureOffsetStepSize().then((value) {
@ -192,15 +193,16 @@ class CameraContainerBloc extends EvSourceBlocBase<CameraContainerEvent, CameraC
final apertureValueRatio = (tags["EXIF FNumber"]?.values as IfdRatios?)?.ratios.first; final apertureValueRatio = (tags["EXIF FNumber"]?.values as IfdRatios?)?.ratios.first;
final speedValueRatio = (tags["EXIF ExposureTime"]?.values as IfdRatios?)?.ratios.first; final speedValueRatio = (tags["EXIF ExposureTime"]?.values as IfdRatios?)?.ratios.first;
if (iso == null || apertureValueRatio == null || speedValueRatio == null) { if (iso == null || apertureValueRatio == null || speedValueRatio == null) {
log('Error parsing EXIF: ${tags.keys.toString()}');
return null; return null;
} }
final aperture = apertureValueRatio.numerator / apertureValueRatio.denominator; final aperture = apertureValueRatio.numerator / apertureValueRatio.denominator;
final speed = speedValueRatio.numerator / speedValueRatio.denominator; final speed = speedValueRatio.numerator / speedValueRatio.denominator;
return log2(pow(aperture, 2)) - log2(speed) - log2(iso / 100); return log2(math.pow(aperture, 2)) - log2(speed) - log2(iso / 100);
} on CameraException catch (e) { } on CameraException catch (e) {
debugPrint('Error: ${e.code}\nError Message: ${e.description}'); log('Error: ${e.code}\nError Message: ${e.description}');
return null; return null;
} }
} }