`device.activeFormat.formatDescription` reports the device's
*selected* format, but on macOS the session-preset remap means the
data output sometimes delivers a different resolution than what
the active format claims. The mismatch surfaced as a stretched
preview on macOS: camera_thumb's SizedBox was sized for a 4:3
buffer, the FittedBox(cover) was given a 16:9 texture, so the
texture stretched to fill the wrongly-shaped box.
PreviewSink now snapshots `CVPixelBufferGet{Width,Height}` from
the first sample buffer that arrives and forwards it via a
callback. CameraInstance hooks the callback to emit the existing
`previewSizeChanged` event (same shape the Android backend uses).
The Dart controller writes it into `value.previewSize`,
camera_thumb's SizedBox snaps to the real buffer aspect, and
FittedBox(cover) crops cleanly without stretching.
Identical wire shape and event name as the Android equivalent —
no Dart changes needed.
macOS preview was stretching (aspect wrong) and macOS photo capture
was rotating the landscape sensor 90° because the shared
PhotoOutput / CameraInstance code was setting
`AVCaptureConnection.videoOrientation` from the orientation snapshot
unconditionally. iOS needs that to rotate sample buffers to portrait;
macOS desktop cams are physically landscape and any rotation just
skews the result.
Moved the rotation call behind a per-platform extension on
`AVCaptureConnection`:
- `ios/Classes/Camera/AVCaptureConnection+iOS.swift` applies the
snapshot orientation (current behavior).
- `macos/Classes/Camera/AVCaptureConnection+macOS.swift` is a
no-op. macOS-flavoured photos / preview frames now flow at
native landscape orientation.
`CaptureDevice` reports sensorOrientation=0 on macOS (was hardcoded
90 for iOS); on macOS the page's `normalizeCameraCapture` math then
collapses to identity and the saved JPEG stays the landscape the
sensor produced. iOS keeps sensorOrientation=90 (matches
camera_avfoundation's reported value and the existing capture-
transform math).
Photo and video paths now both produce upright content on macOS
(video already worked because VideoRecorder's transform table maps
the always-portraitUp macOS snapshot to `.identity`).
Reuse the AVFoundation Swift files between iOS and macOS without
sprinkling `#if canImport(UIKit)` through them. The split is:
darwin/Camera/ platform-shared (AVFoundation only)
CameraPlugin channel + instance map
CameraInstance session + outputs + texture
CameraSession AVCaptureSession + runtime-error obs
CaptureDevice front/back discovery
PhotoOutput AVCapturePhotoOutput
PreviewSink CVPixelBuffer → FlutterTexture
VideoRecorder AVAssetWriter
DeviceOrientation wire-string enum
ios/Classes/Camera/ iOS-only impls + extensions
AudioSession AVAudioSession.upgradeForRecording
DeviceOrientationBridge UIDevice.orientation listener
CameraSession+iOS AVCaptureSessionWasInterrupted obs
+ InterruptionReason decode + the
application-audio-session flags
(all iOS-only on AVCaptureSession)
CameraSettings UIApplication.openSettingsURLString
FlutterRegistrar+iOS method-form of textures/messenger
macos/Classes/Camera/ macOS no-op stubs (same surface)
AudioSession no-op (no AVAudioSession on macOS)
DeviceOrientationBridge no-op (desktops don't rotate)
CameraSession+macOS no-op setupPlatform()
CameraSettings NSWorkspace → System Settings'
Privacy_Camera pane
FlutterRegistrar+macOS property-form of textures/messenger
`CameraSession.init` now calls `setupPlatform()` which each platform
provides via an extension — keeps the iOS-only interruption observer
and the `automaticallyConfiguresApplicationAudioSession` /
`usesApplicationAudioSession` flags (both iOS-only on AVCaptureSession)
out of the shared file. Flash-mode in PhotoOutput uses
`if #available(macOS 11/13, *)` rather than `#if`, since those are
plain version gates not platform splits.
The shared files compile into the iOS pod from `ios/Classes/Camera-shared/`
and into the macOS pod from `macos/Classes/Camera-shared/`, each a
mirror populated by a `prepare_command` in the podspec:
rm -rf Classes/Camera-shared && cp -R ../darwin/Camera Classes/Camera-shared
Symlinks and `../` source globs both fail — Pathname.glob bails on
symlinks, and CocoaPods silently drops paths that escape the pod
directory. The mirror destinations are .gitignore'd.
macOS UxPlugin now registers CameraPlugin alongside the others.
