feat(camera): add snap/clip capture
This commit is contained in:
Peter Steinberger
341
apps/macos/Sources/Clawdis/CameraCaptureService.swift
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341
apps/macos/Sources/Clawdis/CameraCaptureService.swift
Normal file
@@ -0,0 +1,341 @@
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import AVFoundation
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import ClawdisIPC
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import CoreGraphics
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import Foundation
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import ImageIO
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import OSLog
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import UniformTypeIdentifiers
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actor CameraCaptureService {
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enum CameraError: LocalizedError, Sendable {
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case cameraUnavailable
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case microphoneUnavailable
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case permissionDenied(kind: String)
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case captureFailed(String)
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case exportFailed(String)
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var errorDescription: String? {
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switch self {
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case .cameraUnavailable:
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"Camera unavailable"
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case .microphoneUnavailable:
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"Microphone unavailable"
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case let .permissionDenied(kind):
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"\(kind) permission denied"
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case let .captureFailed(msg):
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msg
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case let .exportFailed(msg):
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msg
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}
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}
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}
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private let logger = Logger(subsystem: "com.steipete.clawdis", category: "camera")
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func snap(facing: CameraFacing?, maxWidth: Int?, quality: Double?) async throws -> (data: Data, size: CGSize) {
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let facing = facing ?? .front
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let maxWidth = maxWidth.flatMap { $0 > 0 ? $0 : nil }
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let quality = Self.clampQuality(quality)
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try await self.ensureAccess(for: .video)
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let session = AVCaptureSession()
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session.sessionPreset = .photo
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guard let device = Self.pickCamera(facing: facing) else {
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throw CameraError.cameraUnavailable
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}
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let input = try AVCaptureDeviceInput(device: device)
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guard session.canAddInput(input) else {
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throw CameraError.captureFailed("Failed to add camera input")
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}
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session.addInput(input)
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let output = AVCapturePhotoOutput()
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guard session.canAddOutput(output) else {
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throw CameraError.captureFailed("Failed to add photo output")
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}
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session.addOutput(output)
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output.maxPhotoQualityPrioritization = .quality
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session.startRunning()
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defer { session.stopRunning() }
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let settings: AVCapturePhotoSettings = {
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if output.availablePhotoCodecTypes.contains(.jpeg) {
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return AVCapturePhotoSettings(format: [AVVideoCodecKey: AVVideoCodecType.jpeg])
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}
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return AVCapturePhotoSettings()
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}()
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settings.photoQualityPrioritization = .quality
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let rawData: Data = try await withCheckedThrowingContinuation(isolation: nil) { cont in
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output.capturePhoto(with: settings, delegate: PhotoCaptureDelegate(cont))
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}
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return try Self.reencodeJPEG(imageData: rawData, maxWidth: maxWidth, quality: quality)
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}
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func clip(
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facing: CameraFacing?,
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durationMs: Int?,
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includeAudio: Bool,
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outPath: String?) async throws -> (path: String, durationMs: Int, hasAudio: Bool)
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{
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let facing = facing ?? .front
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let durationMs = Self.clampDurationMs(durationMs)
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try await self.ensureAccess(for: .video)
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if includeAudio {
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try await self.ensureAccess(for: .audio)
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}
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let session = AVCaptureSession()
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session.sessionPreset = .high
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guard let camera = Self.pickCamera(facing: facing) else {
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throw CameraError.cameraUnavailable
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}
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let cameraInput = try AVCaptureDeviceInput(device: camera)
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guard session.canAddInput(cameraInput) else {
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throw CameraError.captureFailed("Failed to add camera input")
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}
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session.addInput(cameraInput)
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if includeAudio {
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guard let mic = AVCaptureDevice.default(for: .audio) else {
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throw CameraError.microphoneUnavailable
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}
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let micInput = try AVCaptureDeviceInput(device: mic)
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guard session.canAddInput(micInput) else {
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throw CameraError.captureFailed("Failed to add microphone input")
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}
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session.addInput(micInput)
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}
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let output = AVCaptureMovieFileOutput()
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guard session.canAddOutput(output) else {
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throw CameraError.captureFailed("Failed to add movie output")
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}
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session.addOutput(output)
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output.maxRecordedDuration = CMTime(value: Int64(durationMs), timescale: 1000)
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session.startRunning()
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defer { session.stopRunning() }
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let tmpMovURL = FileManager.default.temporaryDirectory
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.appendingPathComponent("clawdis-camera-\(UUID().uuidString).mov")
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defer { try? FileManager.default.removeItem(at: tmpMovURL) }
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let outputURL: URL = {
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if let outPath, !outPath.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
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return URL(fileURLWithPath: outPath)
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}
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return FileManager.default.temporaryDirectory
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.appendingPathComponent("clawdis-camera-\(UUID().uuidString).mp4")
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}()
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// Ensure we don't fail exporting due to an existing file.
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try? FileManager.default.removeItem(at: outputURL)
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let logger = self.logger
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let recordedURL: URL = try await withCheckedThrowingContinuation(isolation: nil) { cont in
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output.startRecording(to: tmpMovURL, recordingDelegate: MovieFileDelegate(cont, logger: logger))
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}
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try await Self.exportToMP4(inputURL: recordedURL, outputURL: outputURL)
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return (path: outputURL.path, durationMs: durationMs, hasAudio: includeAudio)
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}
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private func ensureAccess(for mediaType: AVMediaType) async throws {
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let status = AVCaptureDevice.authorizationStatus(for: mediaType)
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switch status {
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case .authorized:
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return
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case .notDetermined:
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let ok = await withCheckedContinuation(isolation: nil) { cont in
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AVCaptureDevice.requestAccess(for: mediaType) { granted in
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cont.resume(returning: granted)
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}
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}
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if !ok {
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throw CameraError.permissionDenied(kind: mediaType == .video ? "Camera" : "Microphone")
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}
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case .denied, .restricted:
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throw CameraError.permissionDenied(kind: mediaType == .video ? "Camera" : "Microphone")
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@unknown default:
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throw CameraError.permissionDenied(kind: mediaType == .video ? "Camera" : "Microphone")
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}
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}
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private nonisolated static func pickCamera(facing: CameraFacing) -> AVCaptureDevice? {
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let position: AVCaptureDevice.Position = (facing == .front) ? .front : .back
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if let device = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: position) {
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return device
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}
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// Many macOS cameras report `unspecified` position; fall back to any default.
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return AVCaptureDevice.default(for: .video)
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}
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private nonisolated static func clampQuality(_ quality: Double?) -> Double {
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let q = quality ?? 0.9
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return min(1.0, max(0.05, q))
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}
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private nonisolated static func clampDurationMs(_ ms: Int?) -> Int {
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let v = ms ?? 3000
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return min(15_000, max(250, v))
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}
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private nonisolated static func reencodeJPEG(
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imageData: Data,
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maxWidth: Int?,
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quality: Double) throws -> (data: Data, size: CGSize)
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{
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guard let src = CGImageSourceCreateWithData(imageData as CFData, nil),
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let img = CGImageSourceCreateImageAtIndex(src, 0, nil)
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else {
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throw CameraError.captureFailed("Failed to decode captured image")
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}
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let finalImage: CGImage
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if let maxWidth, img.width > maxWidth {
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guard let scaled = self.downscale(image: img, maxWidth: maxWidth) else {
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throw CameraError.captureFailed("Failed to downscale image")
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}
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finalImage = scaled
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} else {
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finalImage = img
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}
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let out = NSMutableData()
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guard let dest = CGImageDestinationCreateWithData(out, UTType.jpeg.identifier as CFString, 1, nil) else {
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throw CameraError.captureFailed("Failed to create JPEG destination")
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}
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let props = [kCGImageDestinationLossyCompressionQuality: quality] as CFDictionary
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CGImageDestinationAddImage(dest, finalImage, props)
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guard CGImageDestinationFinalize(dest) else {
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throw CameraError.captureFailed("Failed to encode JPEG")
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}
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return (out as Data, CGSize(width: finalImage.width, height: finalImage.height))
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}
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private nonisolated static func downscale(image: CGImage, maxWidth: Int) -> CGImage? {
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guard image.width > 0, image.height > 0 else { return image }
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guard image.width > maxWidth else { return image }
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let scale = Double(maxWidth) / Double(image.width)
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let targetW = maxWidth
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let targetH = max(1, Int((Double(image.height) * scale).rounded()))
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let cs = CGColorSpaceCreateDeviceRGB()
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let bitmapInfo = CGImageAlphaInfo.premultipliedLast.rawValue
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guard let ctx = CGContext(
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data: nil,
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width: targetW,
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height: targetH,
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bitsPerComponent: 8,
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bytesPerRow: 0,
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space: cs,
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bitmapInfo: bitmapInfo)
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else { return nil }
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ctx.interpolationQuality = .high
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ctx.draw(image, in: CGRect(x: 0, y: 0, width: targetW, height: targetH))
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return ctx.makeImage()
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}
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private nonisolated static func exportToMP4(inputURL: URL, outputURL: URL) async throws {
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let asset = AVAsset(url: inputURL)
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guard let export = AVAssetExportSession(asset: asset, presetName: AVAssetExportPresetMediumQuality) else {
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throw CameraError.exportFailed("Failed to create export session")
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}
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export.outputURL = outputURL
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export.outputFileType = .mp4
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export.shouldOptimizeForNetworkUse = true
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await withCheckedContinuation { cont in
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export.exportAsynchronously {
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cont.resume()
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}
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}
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switch export.status {
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case .completed:
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return
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case .failed:
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throw CameraError.exportFailed(export.error?.localizedDescription ?? "export failed")
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case .cancelled:
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throw CameraError.exportFailed("export cancelled")
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default:
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throw CameraError.exportFailed("export did not complete (\(export.status.rawValue))")
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}
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}
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}
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private final class PhotoCaptureDelegate: NSObject, AVCapturePhotoCaptureDelegate {
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private var cont: CheckedContinuation<Data, Error>?
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init(_ cont: CheckedContinuation<Data, Error>) {
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self.cont = cont
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}
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func photoOutput(
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_ output: AVCapturePhotoOutput,
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didFinishProcessingPhoto photo: AVCapturePhoto,
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error: Error?)
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{
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guard let cont else { return }
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self.cont = nil
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if let error {
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cont.resume(throwing: error)
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return
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}
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guard let data = photo.fileDataRepresentation() else {
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cont.resume(throwing: CameraCaptureService.CameraError.captureFailed("No photo data"))
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return
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}
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cont.resume(returning: data)
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}
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}
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private final class MovieFileDelegate: NSObject, AVCaptureFileOutputRecordingDelegate {
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private var cont: CheckedContinuation<URL, Error>?
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private let logger: Logger
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init(_ cont: CheckedContinuation<URL, Error>, logger: Logger) {
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self.cont = cont
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self.logger = logger
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}
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func fileOutput(
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_ output: AVCaptureFileOutput,
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didFinishRecordingTo outputFileURL: URL,
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from connections: [AVCaptureConnection],
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error: Error?)
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{
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guard let cont else { return }
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self.cont = nil
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if let error {
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let ns = error as NSError
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if ns.domain == AVFoundationErrorDomain,
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ns.code == AVError.maximumDurationReached.rawValue
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{
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cont.resume(returning: outputFileURL)
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return
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}
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self.logger.error("camera record failed: \(error.localizedDescription, privacy: .public)")
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cont.resume(throwing: error)
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return
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}
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cont.resume(returning: outputFileURL)
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}
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}
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