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sergeidesenkosergeidesenko
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[camera_avfoundation] Set highest available resolution for ResolutionPreset.Max (#5245)
The current implementation of the camera plugin for iOS iterates though all other resolution presets when set to FLTResolutionPresetMax. This results in a resolution of 3840x2160 at most, while native camera is able to produce 4032x3024 This change should partially address these issues at least. - flutter/flutter#58163 - flutter/flutter#78247 - flutter/flutter#45906 P.S. I'm not really sure about tests - it seems that resolution presets are not covered by any. Any feedback is appreciated!
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‎packages/camera/camera_avfoundation/CHANGELOG.md

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## 0.9.14+1
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* Fixes bug where max resolution preset does not produce highest available resolution on iOS.
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## 0.9.14
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* Adds support to HEIF format.

‎packages/camera/camera_avfoundation/example/ios/Runner.xcodeproj/project.pbxproj

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97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
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97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
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97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
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CEF6611A2B5E36A500D33FD4 /* CameraSessionPresetsTests.m in Sources */ = {isa = PBXBuildFile; fileRef = CEF661192B5E36A500D33FD4 /* CameraSessionPresetsTests.m */; };
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E01EE4A82799F3A5008C1950 /* QueueUtilsTests.m in Sources */ = {isa = PBXBuildFile; fileRef = E01EE4A72799F3A5008C1950 /* QueueUtilsTests.m */; };
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E032F250279F5E94009E9028 /* CameraCaptureSessionQueueRaceConditionTests.m in Sources */ = {isa = PBXBuildFile; fileRef = E032F24F279F5E94009E9028 /* CameraCaptureSessionQueueRaceConditionTests.m */; };
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E04F108627A87CA600573D0C /* FLTSavePhotoDelegateTests.m in Sources */ = {isa = PBXBuildFile; fileRef = E04F108527A87CA600573D0C /* FLTSavePhotoDelegateTests.m */; };
@@ -89,6 +90,7 @@
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97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
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9C5CC6CAD53AD388B2694F3A /* Pods-RunnerTests.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.debug.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.debug.xcconfig"; sourceTree = "<group>"; };
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A24F9E418BA48BCC7409B117 /* Pods-RunnerTests.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.release.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.release.xcconfig"; sourceTree = "<group>"; };
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CEF661192B5E36A500D33FD4 /* CameraSessionPresetsTests.m */ = {isa = PBXFileReference; indentWidth = 2; lastKnownFileType = sourcecode.c.objc; path = CameraSessionPresetsTests.m; sourceTree = "<group>"; };
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E01EE4A72799F3A5008C1950 /* QueueUtilsTests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = QueueUtilsTests.m; sourceTree = "<group>"; };
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E032F24F279F5E94009E9028 /* CameraCaptureSessionQueueRaceConditionTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CameraCaptureSessionQueueRaceConditionTests.m; sourceTree = "<group>"; };
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E04F108527A87CA600573D0C /* FLTSavePhotoDelegateTests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = FLTSavePhotoDelegateTests.m; sourceTree = "<group>"; };
@@ -151,6 +153,7 @@
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E0F95E3C27A32AB900699390 /* CameraPropertiesTests.m */,
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788A065927B0E02900533D74 /* StreamingTest.m */,
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43ED1536282570DE00EB00DE /* AvailableCamerasTest.m */,
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CEF661192B5E36A500D33FD4 /* CameraSessionPresetsTests.m */,
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);
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path = RunnerTests;
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sourceTree = "<group>";
@@ -451,6 +454,7 @@
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F6EE622F2710A6FC00905E4A /* MockFLTThreadSafeFlutterResult.m in Sources */,
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E0CDBAC227CD9729002561D9 /* CameraTestUtils.m in Sources */,
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334733EA2668111C00DCC49E /* CameraOrientationTests.m in Sources */,
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CEF6611A2B5E36A500D33FD4 /* CameraSessionPresetsTests.m in Sources */,
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E032F250279F5E94009E9028 /* CameraCaptureSessionQueueRaceConditionTests.m in Sources */,
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788A065A27B0E02900533D74 /* StreamingTest.m in Sources */,
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E0C6E2022770F01A00EA6AA3 /* ThreadSafeEventChannelTests.m in Sources */,

‎packages/camera/camera_avfoundation/example/ios/RunnerTests/CameraSessionPresetsTests.m

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// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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@import camera_avfoundation;
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@import camera_avfoundation.Test;
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@import AVFoundation;
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@import XCTest;
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#import <OCMock/OCMock.h>
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#import "CameraTestUtils.h"
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/// Includes test cases related to resolution presets setting operations for FLTCam class.
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@interface FLTCamSessionPresetsTest : XCTestCase
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@end
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@implementation FLTCamSessionPresetsTest
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- (void)testResolutionPresetWithBestFormat_mustUpdateCaptureSessionPreset {
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NSString *expectedPreset = AVCaptureSessionPresetInputPriority;
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id videoSessionMock = OCMClassMock([AVCaptureSession class]);
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OCMStub([videoSessionMock addInputWithNoConnections:[OCMArg any]]);
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id captureFormatMock = OCMClassMock([AVCaptureDeviceFormat class]);
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id captureDeviceMock = OCMClassMock([AVCaptureDevice class]);
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OCMStub([captureDeviceMock formats]).andReturn(@[ captureFormatMock ]);
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OCMExpect([captureDeviceMock activeFormat]).andReturn(captureFormatMock);
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OCMExpect([captureDeviceMock lockForConfiguration:NULL]).andReturn(YES);
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OCMExpect([videoSessionMock setSessionPreset:expectedPreset]);
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FLTCreateCamWithVideoDimensionsForFormat(videoSessionMock, @"max", captureDeviceMock,
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^CMVideoDimensions(AVCaptureDeviceFormat *format) {
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CMVideoDimensions videoDimensions;
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videoDimensions.width = 1;
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videoDimensions.height = 1;
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return videoDimensions;
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});
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OCMVerifyAll(captureDeviceMock);
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OCMVerifyAll(videoSessionMock);
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}
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- (void)testResolutionPresetWithCanSetSessionPresetMax_mustUpdateCaptureSessionPreset {
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NSString *expectedPreset = AVCaptureSessionPreset3840x2160;
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id videoSessionMock = OCMClassMock([AVCaptureSession class]);
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OCMStub([videoSessionMock addInputWithNoConnections:[OCMArg any]]);
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// Make sure that setting resolution preset for session always succeeds.
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OCMStub([videoSessionMock canSetSessionPreset:[OCMArg any]]).andReturn(YES);
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OCMExpect([videoSessionMock setSessionPreset:expectedPreset]);
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FLTCreateCamWithVideoCaptureSession(videoSessionMock, @"max");
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OCMVerifyAll(videoSessionMock);
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}
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- (void)testResolutionPresetWithCanSetSessionPresetUltraHigh_mustUpdateCaptureSessionPreset {
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NSString *expectedPreset = AVCaptureSessionPreset3840x2160;
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id videoSessionMock = OCMClassMock([AVCaptureSession class]);
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OCMStub([videoSessionMock addInputWithNoConnections:[OCMArg any]]);
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// Make sure that setting resolution preset for session always succeeds.
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OCMStub([videoSessionMock canSetSessionPreset:[OCMArg any]]).andReturn(YES);
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// Expect that setting "ultraHigh" resolutionPreset correctly updates videoCaptureSession.
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OCMExpect([videoSessionMock setSessionPreset:expectedPreset]);
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FLTCreateCamWithVideoCaptureSession(videoSessionMock, @"ultraHigh");
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OCMVerifyAll(videoSessionMock);
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}
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@end

‎packages/camera/camera_avfoundation/example/ios/RunnerTests/CameraTestUtils.h

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/// @return an FLTCam object.
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extern FLTCam *FLTCreateCamWithCaptureSessionQueue(dispatch_queue_t captureSessionQueue);
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/// Creates an `FLTCam` with a given captureSession and resolutionPreset
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/// @param captureSession AVCaptureSession for video
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/// @param resolutionPreset preset for camera's captureSession resolution
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/// @return an FLTCam object.
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extern FLTCam *FLTCreateCamWithVideoCaptureSession(AVCaptureSession *captureSession,
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NSString *resolutionPreset);
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/// Creates an `FLTCam` with a given captureSession and resolutionPreset.
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/// Allows to inject a capture device and a block to compute the video dimensions.
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/// @param captureSession AVCaptureSession for video
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/// @param resolutionPreset preset for camera's captureSession resolution
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/// @param captureDevice AVCaptureDevice to be used
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/// @param videoDimensionsForFormat custom code to determine video dimensions
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/// @return an FLTCam object.
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extern FLTCam *FLTCreateCamWithVideoDimensionsForFormat(
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AVCaptureSession *captureSession, NSString *resolutionPreset, AVCaptureDevice *captureDevice,
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VideoDimensionsForFormat videoDimensionsForFormat);
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/// Creates a test sample buffer.
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/// @return a test sample buffer.
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extern CMSampleBufferRef FLTCreateTestSampleBuffer(void);

‎packages/camera/camera_avfoundation/example/ios/RunnerTests/CameraTestUtils.m

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.andReturn(inputMock);
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id videoSessionMock = OCMClassMock([AVCaptureSession class]);
15-
OCMStub([videoSessionMock addInputWithNoConnections:[OCMArg any]]); // no-op
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OCMStub([videoSessionMock addInputWithNoConnections:[OCMArg any]]);
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OCMStub([videoSessionMock canSetSessionPreset:[OCMArg any]]).andReturn(YES);
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1818
id audioSessionMock = OCMClassMock([AVCaptureSession class]);
19-
OCMStub([audioSessionMock addInputWithNoConnections:[OCMArg any]]); // no-op
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OCMStub([audioSessionMock addInputWithNoConnections:[OCMArg any]]);
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OCMStub([audioSessionMock canSetSessionPreset:[OCMArg any]]).andReturn(YES);
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return [[FLTCam alloc] initWithCameraName:@"camera"
@@ -29,6 +29,51 @@
2929
error:nil];
3030
}
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32+
FLTCam *FLTCreateCamWithVideoCaptureSession(AVCaptureSession *captureSession,
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NSString *resolutionPreset) {
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id inputMock = OCMClassMock([AVCaptureDeviceInput class]);
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OCMStub([inputMock deviceInputWithDevice:[OCMArg any] error:[OCMArg setTo:nil]])
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.andReturn(inputMock);
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id audioSessionMock = OCMClassMock([AVCaptureSession class]);
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OCMStub([audioSessionMock addInputWithNoConnections:[OCMArg any]]);
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OCMStub([audioSessionMock canSetSessionPreset:[OCMArg any]]).andReturn(YES);
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return [[FLTCam alloc] initWithCameraName:@"camera"
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resolutionPreset:resolutionPreset
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enableAudio:true
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orientation:UIDeviceOrientationPortrait
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videoCaptureSession:captureSession
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audioCaptureSession:audioSessionMock
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captureSessionQueue:dispatch_queue_create("capture_session_queue", NULL)
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error:nil];
50+
}
51+
52+
FLTCam *FLTCreateCamWithVideoDimensionsForFormat(
53+
AVCaptureSession *captureSession, NSString *resolutionPreset, AVCaptureDevice *captureDevice,
54+
VideoDimensionsForFormat videoDimensionsForFormat) {
55+
id inputMock = OCMClassMock([AVCaptureDeviceInput class]);
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OCMStub([inputMock deviceInputWithDevice:[OCMArg any] error:[OCMArg setTo:nil]])
57+
.andReturn(inputMock);
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id audioSessionMock = OCMClassMock([AVCaptureSession class]);
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OCMStub([audioSessionMock addInputWithNoConnections:[OCMArg any]]);
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OCMStub([audioSessionMock canSetSessionPreset:[OCMArg any]]).andReturn(YES);
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return
64+
[[FLTCam alloc] initWithResolutionPreset:resolutionPreset
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enableAudio:true
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orientation:UIDeviceOrientationPortrait
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videoCaptureSession:captureSession
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audioCaptureSession:audioSessionMock
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captureSessionQueue:dispatch_queue_create("capture_session_queue", NULL)
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captureDeviceFactory:^AVCaptureDevice *(void) {
71+
return captureDevice;
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}
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videoDimensionsForFormat:videoDimensionsForFormat
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error:nil];
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}
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3277
CMSampleBufferRef FLTCreateTestSampleBuffer(void) {
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CVPixelBufferRef pixelBuffer;
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CVPixelBufferCreate(kCFAllocatorDefault, 100, 100, kCVPixelFormatType_32BGRA, NULL, &pixelBuffer);

‎packages/camera/camera_avfoundation/ios/Classes/FLTCam.h

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orientation:(UIDeviceOrientation)orientation
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captureSessionQueue:(dispatch_queue_t)captureSessionQueue
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error:(NSError **)error;
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- (void)start;
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- (void)stop;
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- (void)setDeviceOrientation:(UIDeviceOrientation)orientation;

‎packages/camera/camera_avfoundation/ios/Classes/FLTCam.m

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@@ -86,6 +86,11 @@ @interface FLTCam () <AVCaptureVideoDataOutputSampleBufferDelegate,
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/// Videos are written to disk by `videoAdaptor` on an internal queue managed by AVFoundation.
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@property(strong, nonatomic) dispatch_queue_t photoIOQueue;
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@property(assign, nonatomic) UIDeviceOrientation deviceOrientation;
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/// A wrapper for CMVideoFormatDescriptionGetDimensions.
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/// Allows for alternate implementations in tests.
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@property(nonatomic, copy) VideoDimensionsForFormat videoDimensionsForFormat;
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/// A wrapper for AVCaptureDevice creation to allow for dependency injection in tests.
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@property(nonatomic, copy) CaptureDeviceFactory captureDeviceFactory;
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@end
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@implementation FLTCam
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audioCaptureSession:(AVCaptureSession *)audioCaptureSession
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captureSessionQueue:(dispatch_queue_t)captureSessionQueue
118123
error:(NSError **)error {
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return [self initWithResolutionPreset:resolutionPreset
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enableAudio:enableAudio
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orientation:orientation
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videoCaptureSession:videoCaptureSession
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audioCaptureSession:videoCaptureSession
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captureSessionQueue:captureSessionQueue
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captureDeviceFactory:^AVCaptureDevice *(void) {
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return [AVCaptureDevice deviceWithUniqueID:cameraName];
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}
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videoDimensionsForFormat:^CMVideoDimensions(AVCaptureDeviceFormat *format) {
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return CMVideoFormatDescriptionGetDimensions(format.formatDescription);
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}
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error:error];
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}
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- (instancetype)initWithResolutionPreset:(NSString *)resolutionPreset
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enableAudio:(BOOL)enableAudio
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orientation:(UIDeviceOrientation)orientation
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videoCaptureSession:(AVCaptureSession *)videoCaptureSession
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audioCaptureSession:(AVCaptureSession *)audioCaptureSession
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captureSessionQueue:(dispatch_queue_t)captureSessionQueue
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captureDeviceFactory:(CaptureDeviceFactory)captureDeviceFactory
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videoDimensionsForFormat:(VideoDimensionsForFormat)videoDimensionsForFormat
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error:(NSError **)error {
119148
self = [super init];
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NSAssert(self, @"super init cannot be nil");
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_resolutionPreset = FLTGetFLTResolutionPresetForString(resolutionPreset);
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_photoIOQueue = dispatch_queue_create("io.flutter.camera.photoIOQueue", NULL);
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_videoCaptureSession = videoCaptureSession;
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_audioCaptureSession = audioCaptureSession;
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_captureDevice = [AVCaptureDevice deviceWithUniqueID:cameraName];
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_captureDeviceFactory = captureDeviceFactory;
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_captureDevice = captureDeviceFactory();
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_videoDimensionsForFormat = videoDimensionsForFormat;
140171
_flashMode = _captureDevice.hasFlash ? FLTFlashModeAuto : FLTFlashModeOff;
141172
_exposureMode = FLTExposureModeAuto;
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_focusMode = FLTFocusModeAuto;
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367398
- (BOOL)setCaptureSessionPreset:(FLTResolutionPreset)resolutionPreset withError:(NSError **)error {
368399
switch (resolutionPreset) {
369-
case FLTResolutionPresetMax:
400+
case FLTResolutionPresetMax: {
401+
AVCaptureDeviceFormat *bestFormat =
402+
[self highestResolutionFormatForCaptureDevice:_captureDevice];
403+
if (bestFormat) {
404+
_videoCaptureSession.sessionPreset = AVCaptureSessionPresetInputPriority;
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if ([_captureDevice lockForConfiguration:NULL]) {
406+
// Set the best device format found and finish the device configuration.
407+
_captureDevice.activeFormat = bestFormat;
408+
[_captureDevice unlockForConfiguration];
409+
410+
// Set the preview size based on values from the current capture device.
411+
_previewSize =
412+
CGSizeMake(_captureDevice.activeFormat.highResolutionStillImageDimensions.width,
413+
_captureDevice.activeFormat.highResolutionStillImageDimensions.height);
414+
break;
415+
}
416+
}
417+
}
370418
case FLTResolutionPresetUltraHigh:
371419
if ([_videoCaptureSession canSetSessionPreset:AVCaptureSessionPreset3840x2160]) {
372420
_videoCaptureSession.sessionPreset = AVCaptureSessionPreset3840x2160;
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422470
return YES;
423471
}
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473+
/// Finds the highest available resolution in terms of pixel count for the given device.
474+
- (AVCaptureDeviceFormat *)highestResolutionFormatForCaptureDevice:
475+
(AVCaptureDevice *)captureDevice {
476+
AVCaptureDeviceFormat *bestFormat = nil;
477+
NSUInteger maxPixelCount = 0;
478+
for (AVCaptureDeviceFormat *format in _captureDevice.formats) {
479+
CMVideoDimensions res = self.videoDimensionsForFormat(format);
480+
NSUInteger height = res.height;
481+
NSUInteger width = res.width;
482+
NSUInteger pixelCount = height * width;
483+
if (pixelCount > maxPixelCount) {
484+
maxPixelCount = pixelCount;
485+
bestFormat = format;
486+
}
487+
}
488+
return bestFormat;
489+
}
490+
425491
- (void)captureOutput:(AVCaptureOutput *)output
426492
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
427493
fromConnection:(AVCaptureConnection *)connection {
@@ -935,7 +1001,7 @@ - (void)setDescriptionWhileRecording:(NSString *)cameraName
9351001
return;
9361002
}
9371003

938-
_captureDevice = [AVCaptureDevice deviceWithUniqueID:cameraName];
1004+
_captureDevice = self.captureDeviceFactory();
9391005

9401006
AVCaptureConnection *oldConnection =
9411007
[_captureVideoOutput connectionWithMediaType:AVMediaTypeVideo];

‎packages/camera/camera_avfoundation/ios/Classes/FLTCam_Test.h

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#import "FLTCam.h"
66
#import "FLTSavePhotoDelegate.h"
77

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/// Determines the video dimensions (width and height) for a given capture device format.
9+
/// Used in tests to mock CMVideoFormatDescriptionGetDimensions.
10+
typedef CMVideoDimensions (^VideoDimensionsForFormat)(AVCaptureDeviceFormat *);
11+
12+
/// Factory block returning an AVCaptureDevice.
13+
/// Used in tests to inject a device into FLTCam.
14+
typedef AVCaptureDevice * (^CaptureDeviceFactory)(void);
15+
816
@interface FLTImageStreamHandler : NSObject <FlutterStreamHandler>
917

1018
/// The queue on which `eventSink` property should be accessed.
@@ -55,6 +63,19 @@
5563
captureSessionQueue:(dispatch_queue_t)captureSessionQueue
5664
error:(NSError **)error;
5765

66+
/// Initializes a camera instance.
67+
/// Allows for testing with specified resolution, audio preference, orientation,
68+
/// and direct access to capture sessions and blocks.
69+
- (instancetype)initWithResolutionPreset:(NSString *)resolutionPreset
70+
enableAudio:(BOOL)enableAudio
71+
orientation:(UIDeviceOrientation)orientation
72+
videoCaptureSession:(AVCaptureSession *)videoCaptureSession
73+
audioCaptureSession:(AVCaptureSession *)audioCaptureSession
74+
captureSessionQueue:(dispatch_queue_t)captureSessionQueue
75+
captureDeviceFactory:(CaptureDeviceFactory)captureDeviceFactory
76+
videoDimensionsForFormat:(VideoDimensionsForFormat)videoDimensionsForFormat
77+
error:(NSError **)error;
78+
5879
/// Start streaming images.
5980
- (void)startImageStreamWithMessenger:(NSObject<FlutterBinaryMessenger> *)messenger
6081
imageStreamHandler:(FLTImageStreamHandler *)imageStreamHandler;

‎packages/camera/camera_avfoundation/pubspec.yaml

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22
description: iOS implementation of the camera plugin.
33
repository: https://github.com/flutter/packages/tree/main/packages/camera/camera_avfoundation
44
issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+camera%22
5-
version: 0.9.14
5+
6+
version: 0.9.14+1
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environment:
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sdk: ^3.2.3

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