64cdb82459
主要改动： - EditorView: 添加5种比例模板选择（原比例/锁屏/全屏/4:3/1:1） - EditorView: 实现裁剪预览（半透明遮罩+裁剪框）和缩放拖拽手势 - LivePhotoCore: ExportParams 新增 CropRect 和 AspectRatioTemplate - LivePhotoCore: scaleVideoToTargetDuration 支持裁剪和比例输出 - AppState: 添加任务取消机制（cancelProcessing） - ProcessingView: 添加取消按钮，支持取消状态显示 - CacheManager: 添加 removeWorkDir 静默清理方法 - Analytics: 添加 buildLivePhotoCancel 事件 M1 编辑能力全部完成： ✅ 比例模板：锁屏/全屏/4:3/1:1/原比例 ✅ 裁剪手势：缩放+拖拽 ✅ 取消策略：终止任务+清理中间文件 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
1124 lines
49 KiB
Swift
1124 lines
49 KiB
Swift
import AVFoundation
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import Foundation
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import ImageIO
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import os
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import Photos
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import UIKit
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import UniformTypeIdentifiers
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import VideoToolbox
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public enum LivePhotoBuildStage: String, Codable, Sendable {
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case normalize
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case extractKeyFrame
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case writePhotoMetadata
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case writeVideoMetadata
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case saveToAlbum
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case validate
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}
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public struct LivePhotoBuildProgress: Sendable {
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public var stage: LivePhotoBuildStage
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public var fraction: Double
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public init(stage: LivePhotoBuildStage, fraction: Double) {
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self.stage = stage
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self.fraction = fraction
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}
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}
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public enum WorkStatus: String, Codable, Sendable {
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case idle
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case editing
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case processing
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case success
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case failed
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}
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public struct SourceRef: Codable, Sendable, Hashable {
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public var phAssetLocalIdentifier: String?
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public var fileURL: URL?
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public init(phAssetLocalIdentifier: String) {
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self.phAssetLocalIdentifier = phAssetLocalIdentifier
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self.fileURL = nil
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}
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public init(fileURL: URL) {
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self.phAssetLocalIdentifier = nil
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self.fileURL = fileURL
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}
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}
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public enum AudioPolicy: String, Codable, Sendable {
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case keep
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case remove
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}
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public enum CodecPolicy: String, Codable, Sendable {
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case passthrough
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case fallbackH264
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}
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public enum HDRPolicy: String, Codable, Sendable {
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case keep
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case toneMapToSDR
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}
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/// 裁剪区域（归一化坐标，0~1）
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public struct CropRect: Codable, Sendable, Hashable {
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public var x: CGFloat // 左上角 x（0~1）
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public var y: CGFloat // 左上角 y（0~1）
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public var width: CGFloat // 宽度（0~1）
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public var height: CGFloat // 高度（0~1）
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public init(x: CGFloat = 0, y: CGFloat = 0, width: CGFloat = 1, height: CGFloat = 1) {
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self.x = x
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self.y = y
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self.width = width
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self.height = height
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}
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/// 全画幅（不裁剪）
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public static let full = CropRect()
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/// 转换为像素坐标
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public func toPixelRect(videoSize: CGSize) -> CGRect {
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CGRect(
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x: x * videoSize.width,
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y: y * videoSize.height,
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width: width * videoSize.width,
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height: height * videoSize.height
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)
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}
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}
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/// 预设比例模板
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public enum AspectRatioTemplate: String, Codable, Sendable, CaseIterable {
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case original = "original" // 保持原比例
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case lockScreen = "lock_screen" // iPhone 锁屏 9:19.5
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case fullScreen = "full_screen" // 全面屏 9:16
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case classic = "classic" // 经典 4:3
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case square = "square" // 正方形 1:1
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public var displayName: String {
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switch self {
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case .original: return "原比例"
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case .lockScreen: return "锁屏"
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case .fullScreen: return "全屏"
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case .classic: return "4:3"
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case .square: return "1:1"
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}
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}
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public var ratio: CGFloat? {
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switch self {
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case .original: return nil
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case .lockScreen: return 9.0 / 19.5
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case .fullScreen: return 9.0 / 16.0
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case .classic: return 3.0 / 4.0
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case .square: return 1.0
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}
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}
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}
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public struct ExportParams: Codable, Sendable, Hashable {
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public var trimStart: Double
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public var trimEnd: Double
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public var keyFrameTime: Double
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public var audioPolicy: AudioPolicy
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public var codecPolicy: CodecPolicy
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public var hdrPolicy: HDRPolicy
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public var maxDimension: Int
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public var cropRect: CropRect
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public var aspectRatio: AspectRatioTemplate
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public init(
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trimStart: Double = 0,
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trimEnd: Double = 1.0,
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keyFrameTime: Double = 0.5,
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audioPolicy: AudioPolicy = .keep,
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codecPolicy: CodecPolicy = .fallbackH264,
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hdrPolicy: HDRPolicy = .toneMapToSDR,
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maxDimension: Int = 1920,
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cropRect: CropRect = .full,
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aspectRatio: AspectRatioTemplate = .original
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) {
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self.trimStart = trimStart
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self.trimEnd = trimEnd
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self.keyFrameTime = keyFrameTime
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self.audioPolicy = audioPolicy
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self.codecPolicy = codecPolicy
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self.hdrPolicy = hdrPolicy
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self.maxDimension = maxDimension
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self.cropRect = cropRect
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self.aspectRatio = aspectRatio
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}
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}
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public struct AppError: Error, Codable, Sendable, Hashable {
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public var code: String
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public var stage: LivePhotoBuildStage?
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public var message: String
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public var underlyingErrorDescription: String?
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public var suggestedActions: [String]
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public init(
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code: String,
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stage: LivePhotoBuildStage? = nil,
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message: String,
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underlyingErrorDescription: String? = nil,
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suggestedActions: [String] = []
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) {
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self.code = code
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self.stage = stage
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self.message = message
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self.underlyingErrorDescription = underlyingErrorDescription
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self.suggestedActions = suggestedActions
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}
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}
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public struct WorkItem: Identifiable, Codable, Sendable, Hashable {
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public var id: UUID
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public var createdAt: Date
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public var sourceVideo: SourceRef
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public var coverImage: SourceRef?
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public var exportParams: ExportParams
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public var status: WorkStatus
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public var resultAssetId: String?
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public var cacheDir: URL
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public var error: AppError?
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public init(
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id: UUID = UUID(),
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createdAt: Date = Date(),
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sourceVideo: SourceRef,
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coverImage: SourceRef? = nil,
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exportParams: ExportParams = ExportParams(),
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status: WorkStatus = .idle,
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resultAssetId: String? = nil,
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cacheDir: URL,
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error: AppError? = nil
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) {
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self.id = id
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self.createdAt = createdAt
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self.sourceVideo = sourceVideo
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self.coverImage = coverImage
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self.exportParams = exportParams
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self.status = status
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self.resultAssetId = resultAssetId
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self.cacheDir = cacheDir
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self.error = error
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}
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}
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public struct LivePhotoWorkPaths: Sendable, Hashable {
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public var workDir: URL
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public var photoURL: URL
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public var pairedVideoURL: URL
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public var logURL: URL
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public init(workDir: URL, photoURL: URL, pairedVideoURL: URL, logURL: URL) {
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self.workDir = workDir
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self.photoURL = photoURL
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self.pairedVideoURL = pairedVideoURL
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self.logURL = logURL
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}
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}
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public struct CacheManager: Sendable {
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public var baseDirectory: URL
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public init(baseDirectory: URL? = nil) throws {
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if let baseDirectory {
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self.baseDirectory = baseDirectory
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} else {
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let caches = try FileManager.default.url(for: .cachesDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
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self.baseDirectory = caches.appendingPathComponent("LivePhotoBuilder", isDirectory: true)
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}
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try FileManager.default.createDirectory(at: self.baseDirectory, withIntermediateDirectories: true)
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}
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public func makeWorkPaths(workId: UUID) throws -> LivePhotoWorkPaths {
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let workDir = baseDirectory.appendingPathComponent(workId.uuidString, isDirectory: true)
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try FileManager.default.createDirectory(at: workDir, withIntermediateDirectories: true)
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return LivePhotoWorkPaths(
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workDir: workDir,
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photoURL: workDir.appendingPathComponent("photo").appendingPathExtension("heic"),
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pairedVideoURL: workDir.appendingPathComponent("paired").appendingPathExtension("mov"),
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logURL: workDir.appendingPathComponent("builder").appendingPathExtension("log")
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)
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}
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public func clearWork(workId: UUID) throws {
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let workDir = baseDirectory.appendingPathComponent(workId.uuidString, isDirectory: true)
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if FileManager.default.fileExists(atPath: workDir.path) {
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try FileManager.default.removeItem(at: workDir)
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}
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}
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/// 移除工作目录（静默失败，用于取消任务时清理）
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public func removeWorkDir(workId: UUID) {
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let workDir = baseDirectory.appendingPathComponent(workId.uuidString, isDirectory: true)
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try? FileManager.default.removeItem(at: workDir)
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}
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}
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public struct LivePhotoLogger: Sendable {
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private var logger: os.Logger
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public init(subsystem: String = "ToLivePhoto", category: String = "LivePhotoCore") {
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self.logger = os.Logger(subsystem: subsystem, category: category)
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}
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public func info(_ message: String) {
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logger.info("\(message, privacy: .public)")
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}
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public func error(_ message: String) {
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logger.error("\(message, privacy: .public)")
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}
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}
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public actor AlbumWriter {
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public init() {}
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public func requestAddOnlyAuthorization() async -> PHAuthorizationStatus {
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await withCheckedContinuation { continuation in
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PHPhotoLibrary.requestAuthorization(for: .addOnly) { status in
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continuation.resume(returning: status)
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}
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}
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}
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public func saveLivePhoto(photoURL: URL, pairedVideoURL: URL, shouldMoveFiles: Bool = false) async throws -> String {
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try await withCheckedThrowingContinuation { continuation in
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var localIdentifier: String?
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PHPhotoLibrary.shared().performChanges({
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let request = PHAssetCreationRequest.forAsset()
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let photoOptions = PHAssetResourceCreationOptions()
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photoOptions.shouldMoveFile = shouldMoveFiles
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photoOptions.uniformTypeIdentifier = UTType.heic.identifier
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let videoOptions = PHAssetResourceCreationOptions()
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videoOptions.shouldMoveFile = shouldMoveFiles
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videoOptions.uniformTypeIdentifier = UTType.quickTimeMovie.identifier
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request.addResource(with: .photo, fileURL: photoURL, options: photoOptions)
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request.addResource(with: .pairedVideo, fileURL: pairedVideoURL, options: videoOptions)
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localIdentifier = request.placeholderForCreatedAsset?.localIdentifier
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}, completionHandler: { success, error in
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if let error {
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continuation.resume(throwing: AppError(code: "LPB-401", stage: .saveToAlbum, message: "保存到相册失败", underlyingErrorDescription: error.localizedDescription, suggestedActions: ["允许添加到相册权限", "稍后重试"]))
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return
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}
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guard success, let id = localIdentifier else {
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continuation.resume(throwing: AppError(code: "LPB-401", stage: .saveToAlbum, message: "保存到相册失败", underlyingErrorDescription: nil, suggestedActions: ["允许添加到相册权限", "稍后重试"]))
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return
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}
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continuation.resume(returning: id)
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})
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}
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}
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}
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public actor LivePhotoValidator {
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public init() {}
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public func isLivePhotoAsset(localIdentifier: String) async -> Bool {
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let result = PHAsset.fetchAssets(withLocalIdentifiers: [localIdentifier], options: nil)
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guard let asset = result.firstObject else {
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return false
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}
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return asset.mediaSubtypes.contains(.photoLive)
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}
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public func requestLivePhoto(localIdentifier: String) async -> PHLivePhoto? {
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let result = PHAsset.fetchAssets(withLocalIdentifiers: [localIdentifier], options: nil)
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guard let asset = result.firstObject else {
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return nil
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}
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return await withCheckedContinuation { continuation in
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PHImageManager.default().requestLivePhoto(
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for: asset,
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targetSize: CGSize(width: 1, height: 1),
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contentMode: .aspectFit,
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options: nil
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) { livePhoto, _ in
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continuation.resume(returning: livePhoto)
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}
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}
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}
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public func requestLivePhoto(photoURL: URL, pairedVideoURL: URL) async -> PHLivePhoto? {
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await withCheckedContinuation { continuation in
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var hasResumed = false
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let requestID = PHLivePhoto.request(
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withResourceFileURLs: [pairedVideoURL, photoURL],
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placeholderImage: nil,
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targetSize: .zero,
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contentMode: .aspectFit
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) { livePhoto, info in
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// 确保只 resume 一次
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guard !hasResumed else { return }
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// 如果是降级版本，等待完整版本
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if let isDegraded = info[PHLivePhotoInfoIsDegradedKey] as? Bool, isDegraded {
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return
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}
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// 检查是否有错误或被取消
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if let error = info[PHLivePhotoInfoErrorKey] as? Error {
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print("[LivePhotoValidator] requestLivePhoto error: \(error.localizedDescription)")
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hasResumed = true
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continuation.resume(returning: nil)
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return
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}
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if let cancelled = info[PHLivePhotoInfoCancelledKey] as? Bool, cancelled {
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print("[LivePhotoValidator] requestLivePhoto cancelled")
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hasResumed = true
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continuation.resume(returning: nil)
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return
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}
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hasResumed = true
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continuation.resume(returning: livePhoto)
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}
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// 添加超时保护，防止无限等待
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DispatchQueue.main.asyncAfter(deadline: .now() + 10) {
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guard !hasResumed else { return }
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print("[LivePhotoValidator] requestLivePhoto timeout, requestID: \(requestID)")
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PHLivePhoto.cancelRequest(withRequestID: requestID)
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hasResumed = true
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continuation.resume(returning: nil)
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}
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}
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}
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public func canCreateLivePhotoFromResources(photoURL: URL, pairedVideoURL: URL) async -> Bool {
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await requestLivePhoto(photoURL: photoURL, pairedVideoURL: pairedVideoURL) != nil
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}
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}
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public struct LivePhotoBuildOutput: Sendable, Hashable {
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public var workId: UUID
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public var assetIdentifier: String
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public var pairedImageURL: URL
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public var pairedVideoURL: URL
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public init(workId: UUID, assetIdentifier: String, pairedImageURL: URL, pairedVideoURL: URL) {
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self.workId = workId
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self.assetIdentifier = assetIdentifier
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self.pairedImageURL = pairedImageURL
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self.pairedVideoURL = pairedVideoURL
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}
|
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}
|
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|
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public actor LivePhotoBuilder {
|
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private let cacheManager: CacheManager
|
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private let logger: LivePhotoLogger
|
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|
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public init(cacheManager: CacheManager? = nil, logger: LivePhotoLogger = LivePhotoLogger()) throws {
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self.cacheManager = try cacheManager ?? CacheManager()
|
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self.logger = logger
|
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}
|
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|
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public func buildResources(
|
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workId: UUID = UUID(),
|
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sourceVideoURL: URL,
|
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coverImageURL: URL? = nil,
|
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exportParams: ExportParams = ExportParams(),
|
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progress: (@Sendable (LivePhotoBuildProgress) -> Void)? = nil
|
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) async throws -> LivePhotoBuildOutput {
|
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let assetIdentifier = UUID().uuidString
|
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let paths = try cacheManager.makeWorkPaths(workId: workId)
|
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|
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progress?(LivePhotoBuildProgress(stage: .normalize, fraction: 0))
|
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let trimmedVideoURL = try await trimVideo(
|
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sourceURL: sourceVideoURL,
|
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trimStart: exportParams.trimStart,
|
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trimEnd: exportParams.trimEnd,
|
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destinationURL: paths.workDir.appendingPathComponent("trimmed.mov")
|
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)
|
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|
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// 关键：将视频变速到约 1 秒，与 metadata.mov 的时间标记匹配
|
||
// live-wallpaper 项目使用 CMTimeMake(550, 600) = 0.917 秒
|
||
// 我们使用 1 秒以完全匹配 metadata.mov 的时长
|
||
let targetDuration = CMTimeMake(value: 550, timescale: 600) // ~0.917 秒，与 live-wallpaper 一致
|
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progress?(LivePhotoBuildProgress(stage: .normalize, fraction: 0.5))
|
||
let scaledVideoURL = try await scaleVideoToTargetDuration(
|
||
sourceURL: trimmedVideoURL,
|
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targetDuration: targetDuration,
|
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cropRect: exportParams.cropRect,
|
||
aspectRatio: exportParams.aspectRatio,
|
||
destinationURL: paths.workDir.appendingPathComponent("scaled.mov")
|
||
)
|
||
|
||
// 计算关键帧时间：目标视频的中间位置（0.5 秒处，与 metadata.mov 的 still-image-time 匹配）
|
||
let relativeKeyFrameTime = 0.5 // 固定为 0.5 秒，与 metadata.mov 匹配
|
||
|
||
progress?(LivePhotoBuildProgress(stage: .extractKeyFrame, fraction: 0))
|
||
let keyPhotoURL = try await resolveKeyPhotoURL(
|
||
videoURL: scaledVideoURL,
|
||
coverImageURL: coverImageURL,
|
||
keyFrameTime: relativeKeyFrameTime,
|
||
destinationURL: paths.workDir.appendingPathComponent("keyPhoto").appendingPathExtension("heic")
|
||
)
|
||
|
||
progress?(LivePhotoBuildProgress(stage: .writePhotoMetadata, fraction: 0))
|
||
guard let pairedImageURL = addAssetID(
|
||
assetIdentifier,
|
||
toImage: keyPhotoURL,
|
||
saveTo: paths.photoURL
|
||
) else {
|
||
throw AppError(code: "LPB-201", stage: .writePhotoMetadata, message: "封面生成失败", underlyingErrorDescription: nil, suggestedActions: ["缩短时长", "降低分辨率", "重试"])
|
||
}
|
||
|
||
progress?(LivePhotoBuildProgress(stage: .writeVideoMetadata, fraction: 0))
|
||
let pairedVideoURL = try await addAssetID(assetIdentifier, toVideo: scaledVideoURL, saveTo: paths.pairedVideoURL, stillImageTimeSeconds: relativeKeyFrameTime, progress: { p in
|
||
progress?(LivePhotoBuildProgress(stage: .writeVideoMetadata, fraction: p))
|
||
})
|
||
|
||
logger.info("Generated Live Photo files:")
|
||
logger.info(" Photo: \(pairedImageURL.path)")
|
||
logger.info(" Video: \(pairedVideoURL.path)")
|
||
logger.info(" AssetIdentifier: \(assetIdentifier)")
|
||
|
||
return LivePhotoBuildOutput(workId: workId, assetIdentifier: assetIdentifier, pairedImageURL: pairedImageURL, pairedVideoURL: pairedVideoURL)
|
||
}
|
||
|
||
private func trimVideo(sourceURL: URL, trimStart: Double, trimEnd: Double, destinationURL: URL) async throws -> URL {
|
||
let asset = AVURLAsset(url: sourceURL)
|
||
|
||
let duration = try await asset.load(.duration).seconds
|
||
let safeTrimStart = max(0, min(trimStart, duration))
|
||
let safeTrimEnd = max(safeTrimStart, min(trimEnd, duration))
|
||
|
||
if safeTrimEnd - safeTrimStart < 0.1 {
|
||
throw AppError(code: "LPB-101", stage: .normalize, message: "视频时长不足", suggestedActions: ["选择更长的视频"])
|
||
}
|
||
|
||
let startTime = CMTime(seconds: safeTrimStart, preferredTimescale: 600)
|
||
let endTime = CMTime(seconds: safeTrimEnd, preferredTimescale: 600)
|
||
let timeRange = CMTimeRange(start: startTime, end: endTime)
|
||
|
||
if FileManager.default.fileExists(atPath: destinationURL.path) {
|
||
try FileManager.default.removeItem(at: destinationURL)
|
||
}
|
||
|
||
let composition = AVMutableComposition()
|
||
|
||
guard let videoTrack = try await asset.loadTracks(withMediaType: .video).first else {
|
||
throw AppError(code: "LPB-101", stage: .normalize, message: "视频轨道不存在", suggestedActions: ["选择其他视频"])
|
||
}
|
||
|
||
let compositionVideoTrack = composition.addMutableTrack(withMediaType: .video, preferredTrackID: kCMPersistentTrackID_Invalid)
|
||
try compositionVideoTrack?.insertTimeRange(timeRange, of: videoTrack, at: .zero)
|
||
|
||
if let audioTrack = try? await asset.loadTracks(withMediaType: .audio).first {
|
||
let compositionAudioTrack = composition.addMutableTrack(withMediaType: .audio, preferredTrackID: kCMPersistentTrackID_Invalid)
|
||
try? compositionAudioTrack?.insertTimeRange(timeRange, of: audioTrack, at: .zero)
|
||
}
|
||
|
||
let transform = try await videoTrack.load(.preferredTransform)
|
||
|
||
// 保持原始视频的 transform，确保方向正确
|
||
compositionVideoTrack?.preferredTransform = transform
|
||
|
||
// 使用 Passthrough 预设保持原始质量和尺寸
|
||
guard let exportSession = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetPassthrough) else {
|
||
throw AppError(code: "LPB-101", stage: .normalize, message: "无法创建导出会话", suggestedActions: ["重试"])
|
||
}
|
||
|
||
exportSession.outputURL = destinationURL
|
||
exportSession.outputFileType = .mov
|
||
|
||
await exportSession.export()
|
||
|
||
guard exportSession.status == .completed else {
|
||
throw AppError(code: "LPB-101", stage: .normalize, message: "视频裁剪失败", underlyingErrorDescription: exportSession.error?.localizedDescription, suggestedActions: ["缩短时长", "重试"])
|
||
}
|
||
|
||
return destinationURL
|
||
}
|
||
|
||
/// 将视频处理为 Live Photo 所需的格式
|
||
/// 包括：时长变速到 ~0.917 秒、裁剪、尺寸调整到 1080x1920（或保持比例）、帧率转换为 60fps
|
||
/// 完全对齐 live-wallpaper 项目的 accelerateVideo + resizeVideo 流程
|
||
private func scaleVideoToTargetDuration(
|
||
sourceURL: URL,
|
||
targetDuration: CMTime,
|
||
cropRect: CropRect,
|
||
aspectRatio: AspectRatioTemplate,
|
||
destinationURL: URL
|
||
) async throws -> URL {
|
||
let asset = AVURLAsset(url: sourceURL)
|
||
|
||
if FileManager.default.fileExists(atPath: destinationURL.path) {
|
||
try FileManager.default.removeItem(at: destinationURL)
|
||
}
|
||
|
||
guard let videoTrack = try await asset.loadTracks(withMediaType: .video).first else {
|
||
throw AppError(code: "LPB-101", stage: .normalize, message: "视频轨道不存在", suggestedActions: ["选择其他视频"])
|
||
}
|
||
|
||
let originalDuration = try await asset.load(.duration)
|
||
let naturalSize = try await videoTrack.load(.naturalSize)
|
||
let preferredTransform = try await videoTrack.load(.preferredTransform)
|
||
|
||
// 计算应用 transform 后的尺寸（与 live-wallpaper resizeVideo 一致）
|
||
let originalSize = CGSize(width: naturalSize.width, height: naturalSize.height)
|
||
let transformedSize = originalSize.applying(preferredTransform)
|
||
let absoluteSize = CGSize(width: abs(transformedSize.width), height: abs(transformedSize.height))
|
||
|
||
// 根据裁剪和比例计算输出尺寸
|
||
let outputSize: CGSize
|
||
if let targetRatio = aspectRatio.ratio {
|
||
// 根据目标比例决定输出尺寸
|
||
// 竖屏优先：宽度 1080，高度根据比例计算
|
||
let width: CGFloat = 1080
|
||
let height = width / targetRatio
|
||
outputSize = CGSize(width: width, height: min(height, 1920))
|
||
} else {
|
||
// 原比例：根据源视频方向决定
|
||
let isLandscape = absoluteSize.width > absoluteSize.height
|
||
outputSize = isLandscape ? CGSize(width: 1920, height: 1080) : CGSize(width: 1080, height: 1920)
|
||
}
|
||
|
||
// 步骤1：先变速到目标时长（对应 live-wallpaper 的 accelerateVideo）
|
||
let acceleratedURL = destinationURL.deletingLastPathComponent().appendingPathComponent("accelerated.mov")
|
||
if FileManager.default.fileExists(atPath: acceleratedURL.path) {
|
||
try FileManager.default.removeItem(at: acceleratedURL)
|
||
}
|
||
|
||
let composition = AVMutableComposition()
|
||
guard let compositionVideoTrack = composition.addMutableTrack(withMediaType: .video, preferredTrackID: kCMPersistentTrackID_Invalid) else {
|
||
throw AppError(code: "LPB-101", stage: .normalize, message: "无法创建视频轨道", suggestedActions: ["重试"])
|
||
}
|
||
|
||
try compositionVideoTrack.insertTimeRange(CMTimeRange(start: .zero, duration: originalDuration), of: videoTrack, at: .zero)
|
||
// 变速：将原始时长缩放到目标时长（与 live-wallpaper accelerateVideo 第 287-288 行一致）
|
||
compositionVideoTrack.scaleTimeRange(CMTimeRange(start: .zero, duration: originalDuration), toDuration: targetDuration)
|
||
compositionVideoTrack.preferredTransform = preferredTransform
|
||
|
||
guard let accelerateExport = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetHighestQuality) else {
|
||
throw AppError(code: "LPB-101", stage: .normalize, message: "无法创建导出会话", suggestedActions: ["重试"])
|
||
}
|
||
|
||
accelerateExport.outputURL = acceleratedURL
|
||
accelerateExport.outputFileType = .mov
|
||
|
||
await accelerateExport.export()
|
||
|
||
guard accelerateExport.status == .completed else {
|
||
throw AppError(code: "LPB-101", stage: .normalize, message: "视频变速失败", underlyingErrorDescription: accelerateExport.error?.localizedDescription, suggestedActions: ["重试"])
|
||
}
|
||
|
||
// 步骤2：调整尺寸和帧率（对应 live-wallpaper 的 resizeVideo）
|
||
let acceleratedAsset = AVURLAsset(url: acceleratedURL)
|
||
guard let acceleratedVideoTrack = try await acceleratedAsset.loadTracks(withMediaType: .video).first else {
|
||
return acceleratedURL
|
||
}
|
||
|
||
let acceleratedDuration = try await acceleratedAsset.load(.duration)
|
||
// 加载加速后视频轨道的属性
|
||
let acceleratedNaturalSize = try await acceleratedVideoTrack.load(.naturalSize)
|
||
let acceleratedTransform = try await acceleratedVideoTrack.load(.preferredTransform)
|
||
|
||
guard let resizeExport = AVAssetExportSession(asset: acceleratedAsset, presetName: AVAssetExportPresetHighestQuality) else {
|
||
return acceleratedURL
|
||
}
|
||
|
||
// 关键：使用 AVMutableVideoComposition 设置输出尺寸和帧率
|
||
let videoComposition = AVMutableVideoComposition()
|
||
videoComposition.renderSize = outputSize
|
||
// 关键：设置 60fps
|
||
videoComposition.frameDuration = CMTime(value: 1, timescale: 60)
|
||
|
||
let instruction = AVMutableVideoCompositionInstruction()
|
||
instruction.timeRange = CMTimeRange(start: .zero, duration: acceleratedDuration)
|
||
|
||
let layerInstruction = AVMutableVideoCompositionLayerInstruction(assetTrack: acceleratedVideoTrack)
|
||
|
||
// 关键修复：正确计算变换（支持裁剪）
|
||
// 变换需要将 naturalSize 坐标系的像素映射到 outputSize 坐标系
|
||
// 步骤：
|
||
// 1. 应用 preferredTransform 旋转视频到正确方向
|
||
// 2. 应用裁剪区域
|
||
// 3. 根据旋转后的实际尺寸计算缩放和居中
|
||
|
||
// 计算旋转后的实际尺寸（用于确定缩放比例）
|
||
let rotatedSize = acceleratedNaturalSize.applying(acceleratedTransform)
|
||
let rotatedAbsoluteSize = CGSize(width: abs(rotatedSize.width), height: abs(rotatedSize.height))
|
||
|
||
// 计算裁剪后的源区域尺寸
|
||
let croppedSourceWidth = rotatedAbsoluteSize.width * cropRect.width
|
||
let croppedSourceHeight = rotatedAbsoluteSize.height * cropRect.height
|
||
|
||
// 基于裁剪后尺寸计算缩放因子（填充模式，确保裁剪区域完全覆盖输出）
|
||
let actualWidthRatio = outputSize.width / croppedSourceWidth
|
||
let actualHeightRatio = outputSize.height / croppedSourceHeight
|
||
let actualScaleFactor = max(actualWidthRatio, actualHeightRatio) // 使用 max 确保填充
|
||
|
||
let scaledWidth = rotatedAbsoluteSize.width * actualScaleFactor
|
||
let scaledHeight = rotatedAbsoluteSize.height * actualScaleFactor
|
||
|
||
// 计算裁剪偏移（将裁剪区域中心对齐到输出中心）
|
||
let cropCenterX = (cropRect.x + cropRect.width / 2) * scaledWidth
|
||
let cropCenterY = (cropRect.y + cropRect.height / 2) * scaledHeight
|
||
let outputCenterX = outputSize.width / 2
|
||
let outputCenterY = outputSize.height / 2
|
||
|
||
let centerX = outputCenterX - cropCenterX
|
||
let centerY = outputCenterY - cropCenterY
|
||
|
||
// 构建最终变换：
|
||
// 对于 preferredTransform，它通常包含旋转+平移，平移部分是为了将旋转后的内容移到正坐标
|
||
// 变换组合顺序（从右到左应用）：
|
||
// 1. 先应用 preferredTransform（旋转+平移到正坐标）
|
||
// 2. 再缩放
|
||
// 3. 最后平移到目标中心
|
||
//
|
||
// 使用 concatenating: A.concatenating(B) 表示先应用 A，再应用 B
|
||
let scaleTransform = CGAffineTransform(scaleX: actualScaleFactor, y: actualScaleFactor)
|
||
let translateToCenter = CGAffineTransform(translationX: centerX, y: centerY)
|
||
let finalTransform = acceleratedTransform.concatenating(scaleTransform).concatenating(translateToCenter)
|
||
|
||
layerInstruction.setTransform(finalTransform, at: .zero)
|
||
|
||
instruction.layerInstructions = [layerInstruction]
|
||
videoComposition.instructions = [instruction]
|
||
|
||
resizeExport.videoComposition = videoComposition
|
||
resizeExport.outputURL = destinationURL
|
||
resizeExport.outputFileType = .mov
|
||
resizeExport.shouldOptimizeForNetworkUse = true
|
||
|
||
await resizeExport.export()
|
||
|
||
// 清理临时文件
|
||
try? FileManager.default.removeItem(at: acceleratedURL)
|
||
|
||
guard resizeExport.status == .completed else {
|
||
throw AppError(code: "LPB-101", stage: .normalize, message: "视频尺寸调整失败", underlyingErrorDescription: resizeExport.error?.localizedDescription, suggestedActions: ["重试"])
|
||
}
|
||
|
||
return destinationURL
|
||
}
|
||
|
||
private func resolveKeyPhotoURL(
|
||
videoURL: URL,
|
||
coverImageURL: URL?,
|
||
keyFrameTime: Double,
|
||
destinationURL: URL
|
||
) async throws -> URL {
|
||
// 最大分辨率限制（对标竞品 1080p）
|
||
let maxDimension = 1920
|
||
|
||
// 内部函数：将 CGImage 写入 HEIC 文件
|
||
func writeHEIC(_ image: CGImage, to url: URL) throws {
|
||
guard let dest = CGImageDestinationCreateWithURL(url as CFURL, UTType.heic.identifier as CFString, 1, nil) else {
|
||
throw AppError(code: "LPB-201", stage: .extractKeyFrame, message: "写入封面失败", underlyingErrorDescription: "无法创建 HEIC 写入器", suggestedActions: ["重试"])
|
||
}
|
||
let props: [String: Any] = [
|
||
kCGImageDestinationLossyCompressionQuality as String: 0.9
|
||
]
|
||
CGImageDestinationAddImage(dest, image, props as CFDictionary)
|
||
guard CGImageDestinationFinalize(dest) else {
|
||
throw AppError(code: "LPB-201", stage: .extractKeyFrame, message: "写入封面失败", underlyingErrorDescription: "HEIC 写入失败", suggestedActions: ["重试"])
|
||
}
|
||
}
|
||
|
||
// 内部函数：缩放图像
|
||
func scaleImage(_ image: CGImage, maxDim: Int) -> CGImage {
|
||
let width = image.width
|
||
let height = image.height
|
||
let maxSide = max(width, height)
|
||
if maxSide <= maxDim { return image }
|
||
|
||
let scale = CGFloat(maxDim) / CGFloat(maxSide)
|
||
let newWidth = Int(CGFloat(width) * scale)
|
||
let newHeight = Int(CGFloat(height) * scale)
|
||
|
||
guard let context = CGContext(
|
||
data: nil, width: newWidth, height: newHeight,
|
||
bitsPerComponent: 8, bytesPerRow: 0,
|
||
space: CGColorSpaceCreateDeviceRGB(),
|
||
bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue
|
||
) else { return image }
|
||
|
||
context.interpolationQuality = .high
|
||
context.draw(image, in: CGRect(x: 0, y: 0, width: newWidth, height: newHeight))
|
||
return context.makeImage() ?? image
|
||
}
|
||
|
||
// 如果用户提供了封面图
|
||
if let coverImageURL {
|
||
guard let src = CGImageSourceCreateWithURL(coverImageURL as CFURL, nil),
|
||
let img = CGImageSourceCreateImageAtIndex(src, 0, nil) else {
|
||
throw AppError(code: "LPB-201", stage: .extractKeyFrame, message: "封面读取失败", underlyingErrorDescription: nil, suggestedActions: ["更换封面图", "重试"])
|
||
}
|
||
let scaledImg = scaleImage(img, maxDim: maxDimension)
|
||
try writeHEIC(scaledImg, to: destinationURL)
|
||
return destinationURL
|
||
}
|
||
|
||
// 从视频抽帧
|
||
let asset = AVURLAsset(url: videoURL)
|
||
let imageGenerator = AVAssetImageGenerator(asset: asset)
|
||
imageGenerator.appliesPreferredTrackTransform = true
|
||
imageGenerator.requestedTimeToleranceAfter = CMTime(value: 1, timescale: 100)
|
||
imageGenerator.requestedTimeToleranceBefore = CMTime(value: 1, timescale: 100)
|
||
// 设置最大尺寸，让 AVAssetImageGenerator 自动缩放
|
||
imageGenerator.maximumSize = CGSize(width: maxDimension, height: maxDimension)
|
||
|
||
let safeSeconds = max(0, min(keyFrameTime, max(0, asset.duration.seconds - 0.1)))
|
||
let time = CMTime(seconds: safeSeconds, preferredTimescale: asset.duration.timescale)
|
||
|
||
let cgImage: CGImage
|
||
do {
|
||
cgImage = try imageGenerator.copyCGImage(at: time, actualTime: nil)
|
||
} catch {
|
||
throw AppError(code: "LPB-201", stage: .extractKeyFrame, message: "抽帧失败", underlyingErrorDescription: error.localizedDescription, suggestedActions: ["缩短时长", "降低分辨率", "重试"])
|
||
}
|
||
|
||
try writeHEIC(cgImage, to: destinationURL)
|
||
return destinationURL
|
||
}
|
||
|
||
private func addAssetID(
|
||
_ assetIdentifier: String,
|
||
toImage imageURL: URL,
|
||
saveTo destinationURL: URL
|
||
) -> URL? {
|
||
let useHEIC = true
|
||
let imageType = useHEIC ? UTType.heic.identifier : UTType.jpeg.identifier
|
||
|
||
guard let imageDestination = CGImageDestinationCreateWithURL(destinationURL as CFURL, imageType as CFString, 1, nil),
|
||
let imageSource = CGImageSourceCreateWithURL(imageURL as CFURL, nil),
|
||
let imageRef = CGImageSourceCreateImageAtIndex(imageSource, 0, nil) else {
|
||
return nil
|
||
}
|
||
|
||
var imageProperties = (CGImageSourceCopyPropertiesAtIndex(imageSource, 0, nil) as? [String: Any]) ?? [:]
|
||
|
||
// 获取图像尺寸
|
||
let width = imageRef.width
|
||
let height = imageRef.height
|
||
|
||
// 添加 TIFF (IFD0) 标准字段 - 对标竞品
|
||
var tiffDict = (imageProperties[kCGImagePropertyTIFFDictionary as String] as? [String: Any]) ?? [:]
|
||
tiffDict[kCGImagePropertyTIFFOrientation as String] = 1 // Horizontal (normal)
|
||
tiffDict[kCGImagePropertyTIFFXResolution as String] = 72
|
||
tiffDict[kCGImagePropertyTIFFYResolution as String] = 72
|
||
tiffDict[kCGImagePropertyTIFFResolutionUnit as String] = 2 // inches
|
||
// 移除 Tile 字段 - 竞品没有这些字段
|
||
tiffDict.removeValue(forKey: kCGImagePropertyTIFFTileWidth as String)
|
||
tiffDict.removeValue(forKey: kCGImagePropertyTIFFTileLength as String)
|
||
imageProperties[kCGImagePropertyTIFFDictionary as String] = tiffDict
|
||
|
||
// 添加 EXIF 标准字段 - 对标竞品
|
||
var exifDict = (imageProperties[kCGImagePropertyExifDictionary as String] as? [String: Any]) ?? [:]
|
||
exifDict[kCGImagePropertyExifVersion as String] = [2, 2, 1] // 0221
|
||
exifDict[kCGImagePropertyExifPixelXDimension as String] = width
|
||
exifDict[kCGImagePropertyExifPixelYDimension as String] = height
|
||
imageProperties[kCGImagePropertyExifDictionary as String] = exifDict
|
||
|
||
// 简化方案：只设置 ContentIdentifier，不注入复杂的 MakerNotes
|
||
// 竞品也只使用 ContentIdentifier，这足以让 Photos 识别 Live Photo
|
||
let assetIdentifierKey = "17" // Content Identifier
|
||
|
||
var makerAppleDict: [String: Any] = [:]
|
||
makerAppleDict[assetIdentifierKey] = assetIdentifier
|
||
imageProperties[kCGImagePropertyMakerAppleDictionary as String] = makerAppleDict
|
||
|
||
CGImageDestinationAddImage(imageDestination, imageRef, imageProperties as CFDictionary)
|
||
|
||
guard CGImageDestinationFinalize(imageDestination) else {
|
||
return nil
|
||
}
|
||
|
||
logger.info("Created HEIC with ContentIdentifier: \(assetIdentifier)")
|
||
return destinationURL
|
||
}
|
||
|
||
private func addAssetID(
|
||
_ assetIdentifier: String,
|
||
toVideo videoURL: URL,
|
||
saveTo destinationURL: URL,
|
||
stillImageTimeSeconds: Double,
|
||
progress: @Sendable @escaping (Double) -> Void
|
||
) async throws -> URL {
|
||
// 关键修复：完全对齐 live-wallpaper 项目的实现
|
||
// 使用 AVAssetReaderTrackOutput + videoInput.transform，而非 AVAssetReaderVideoCompositionOutput
|
||
guard let metadataURL = Self.metadataMovURL else {
|
||
throw AppError(code: "LPB-301", stage: .writeVideoMetadata, message: "缺少 metadata.mov 资源文件", suggestedActions: ["重新安装应用"])
|
||
}
|
||
|
||
return try await withCheckedThrowingContinuation { continuation in
|
||
let queue = DispatchQueue(label: "LivePhotoCore.VideoPairing")
|
||
queue.async {
|
||
do {
|
||
if FileManager.default.fileExists(atPath: destinationURL.path) {
|
||
try FileManager.default.removeItem(at: destinationURL)
|
||
}
|
||
|
||
let videoAsset = AVURLAsset(url: videoURL)
|
||
let metadataAsset = AVURLAsset(url: metadataURL)
|
||
|
||
guard let videoTrack = videoAsset.tracks(withMediaType: .video).first else {
|
||
continuation.resume(throwing: AppError(code: "LPB-301", stage: .writeVideoMetadata, message: "视频处理失败", underlyingErrorDescription: "缺少视频轨", suggestedActions: ["更换一个视频", "重试"]))
|
||
return
|
||
}
|
||
|
||
let durationSeconds = max(0.001, videoAsset.duration.seconds)
|
||
let nominalFrameRate = videoTrack.nominalFrameRate > 0 ? videoTrack.nominalFrameRate : 30
|
||
let frameCount = max(1, Int(durationSeconds * Double(nominalFrameRate)))
|
||
|
||
// 创建 readers 和 writer
|
||
let videoReader = try AVAssetReader(asset: videoAsset)
|
||
let metadataReader = try AVAssetReader(asset: metadataAsset)
|
||
let assetWriter = try AVAssetWriter(outputURL: destinationURL, fileType: .mov)
|
||
|
||
let writingGroup = DispatchGroup()
|
||
|
||
// 关键：使用 AVAssetReaderTrackOutput（与 live-wallpaper 完全一致）
|
||
// 而不是 AVAssetReaderVideoCompositionOutput
|
||
let videoReaderOutput = AVAssetReaderTrackOutput(track: videoTrack, outputSettings: [
|
||
kCVPixelBufferPixelFormatTypeKey as String: NSNumber(value: kCVPixelFormatType_32BGRA as UInt32)
|
||
])
|
||
videoReader.add(videoReaderOutput)
|
||
|
||
// 关键：使用 track.naturalSize 作为输出尺寸（与 live-wallpaper 一致）
|
||
// 视频方向通过 videoInput.transform 控制
|
||
let videoWriterInput = AVAssetWriterInput(
|
||
mediaType: .video,
|
||
outputSettings: [
|
||
AVVideoCodecKey: AVVideoCodecType.h264,
|
||
AVVideoWidthKey: videoTrack.naturalSize.width,
|
||
AVVideoHeightKey: videoTrack.naturalSize.height
|
||
]
|
||
)
|
||
// 关键：通过 transform 属性设置视频方向（与 live-wallpaper 第 108 行完全一致）
|
||
videoWriterInput.transform = videoTrack.preferredTransform
|
||
// 关键：设置 expectsMediaDataInRealTime = true（与 live-wallpaper 第 109 行一致）
|
||
videoWriterInput.expectsMediaDataInRealTime = true
|
||
assetWriter.add(videoWriterInput)
|
||
|
||
// 设置 metadata track 的 reader/writer（从 metadata.mov 复制）
|
||
// 关键：不传 sourceFormatHint，与 live-wallpaper 项目保持一致
|
||
var metadataIOs = [(AVAssetWriterInput, AVAssetReaderTrackOutput)]()
|
||
let metadataTracks = metadataAsset.tracks(withMediaType: .metadata)
|
||
for track in metadataTracks {
|
||
let trackReaderOutput = AVAssetReaderTrackOutput(track: track, outputSettings: nil)
|
||
metadataReader.add(trackReaderOutput)
|
||
|
||
let metadataInput = AVAssetWriterInput(mediaType: .metadata, outputSettings: nil)
|
||
assetWriter.add(metadataInput)
|
||
|
||
metadataIOs.append((metadataInput, trackReaderOutput))
|
||
}
|
||
|
||
// 设置顶级元数据
|
||
assetWriter.metadata = [Self.metadataForAssetID(assetIdentifier)]
|
||
|
||
assetWriter.startWriting()
|
||
videoReader.startReading()
|
||
metadataReader.startReading()
|
||
assetWriter.startSession(atSourceTime: .zero)
|
||
|
||
var currentFrameCount = 0
|
||
|
||
// 写入视频帧
|
||
writingGroup.enter()
|
||
videoWriterInput.requestMediaDataWhenReady(on: DispatchQueue(label: "LivePhotoCore.VideoWriterInput")) {
|
||
while videoWriterInput.isReadyForMoreMediaData {
|
||
if let sampleBuffer = videoReaderOutput.copyNextSampleBuffer() {
|
||
currentFrameCount += 1
|
||
let pct = Double(currentFrameCount) / Double(frameCount)
|
||
progress(pct)
|
||
videoWriterInput.append(sampleBuffer)
|
||
} else {
|
||
videoWriterInput.markAsFinished()
|
||
writingGroup.leave()
|
||
break
|
||
}
|
||
}
|
||
}
|
||
|
||
// 复制 metadata track 的 sample buffer（关键！）
|
||
for (metadataInput, metadataOutput) in metadataIOs {
|
||
writingGroup.enter()
|
||
metadataInput.requestMediaDataWhenReady(on: DispatchQueue(label: "LivePhotoCore.MetadataWriterInput")) {
|
||
while metadataInput.isReadyForMoreMediaData {
|
||
if let sampleBuffer = metadataOutput.copyNextSampleBuffer() {
|
||
metadataInput.append(sampleBuffer)
|
||
} else {
|
||
metadataInput.markAsFinished()
|
||
writingGroup.leave()
|
||
break
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
writingGroup.notify(queue: .main) {
|
||
if videoReader.status == .completed && metadataReader.status == .completed && assetWriter.status == .writing {
|
||
assetWriter.finishWriting {
|
||
if assetWriter.status == .completed {
|
||
continuation.resume(returning: destinationURL)
|
||
} else {
|
||
continuation.resume(throwing: AppError(code: "LPB-301", stage: .writeVideoMetadata, message: "视频处理失败", underlyingErrorDescription: assetWriter.error?.localizedDescription, suggestedActions: ["重试"]))
|
||
}
|
||
}
|
||
} else {
|
||
let errorDesc = videoReader.error?.localizedDescription ?? metadataReader.error?.localizedDescription ?? assetWriter.error?.localizedDescription ?? "未知错误"
|
||
continuation.resume(throwing: AppError(code: "LPB-301", stage: .writeVideoMetadata, message: "视频处理失败", underlyingErrorDescription: errorDesc, suggestedActions: ["重试"]))
|
||
}
|
||
}
|
||
} catch {
|
||
continuation.resume(throwing: AppError(code: "LPB-301", stage: .writeVideoMetadata, message: "视频处理失败", underlyingErrorDescription: error.localizedDescription, suggestedActions: ["重试"]))
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/// 获取 metadata.mov 资源文件的 URL
|
||
private static var metadataMovURL: URL? {
|
||
// 首先尝试从 Bundle 获取（用于 App）
|
||
if let bundleURL = Bundle.main.url(forResource: "metadata", withExtension: "mov") {
|
||
return bundleURL
|
||
}
|
||
// 然后尝试从 module bundle 获取（用于 SPM package）
|
||
#if SWIFT_PACKAGE
|
||
if let moduleURL = Bundle.module.url(forResource: "metadata", withExtension: "mov") {
|
||
return moduleURL
|
||
}
|
||
#endif
|
||
return nil
|
||
}
|
||
|
||
private static func metadataForAssetID(_ assetIdentifier: String) -> AVMetadataItem {
|
||
let item = AVMutableMetadataItem()
|
||
item.key = "com.apple.quicktime.content.identifier" as (NSCopying & NSObjectProtocol)
|
||
item.keySpace = AVMetadataKeySpace(rawValue: "mdta")
|
||
item.value = assetIdentifier as (NSCopying & NSObjectProtocol)
|
||
item.dataType = "com.apple.metadata.datatype.UTF-8"
|
||
return item
|
||
}
|
||
}
|
||
|
||
public struct LivePhotoWorkflowResult: Sendable, Hashable {
|
||
public var workId: UUID
|
||
public var assetIdentifier: String
|
||
public var pairedImageURL: URL
|
||
public var pairedVideoURL: URL
|
||
public var savedAssetId: String
|
||
public var resourceValidationOK: Bool
|
||
public var libraryAssetIsLivePhoto: Bool?
|
||
|
||
public init(
|
||
workId: UUID,
|
||
assetIdentifier: String,
|
||
pairedImageURL: URL,
|
||
pairedVideoURL: URL,
|
||
savedAssetId: String,
|
||
resourceValidationOK: Bool,
|
||
libraryAssetIsLivePhoto: Bool?
|
||
) {
|
||
self.workId = workId
|
||
self.assetIdentifier = assetIdentifier
|
||
self.pairedImageURL = pairedImageURL
|
||
self.pairedVideoURL = pairedVideoURL
|
||
self.savedAssetId = savedAssetId
|
||
self.resourceValidationOK = resourceValidationOK
|
||
self.libraryAssetIsLivePhoto = libraryAssetIsLivePhoto
|
||
}
|
||
}
|
||
|
||
public actor LivePhotoWorkflow {
|
||
private let builder: LivePhotoBuilder
|
||
private let albumWriter: AlbumWriter
|
||
private let validator: LivePhotoValidator
|
||
private let cacheManager: CacheManager
|
||
|
||
public init(cacheManager: CacheManager? = nil, logger: LivePhotoLogger = LivePhotoLogger()) throws {
|
||
let cm = try cacheManager ?? CacheManager()
|
||
self.cacheManager = cm
|
||
self.builder = try LivePhotoBuilder(cacheManager: cm, logger: logger)
|
||
self.albumWriter = AlbumWriter()
|
||
self.validator = LivePhotoValidator()
|
||
}
|
||
|
||
/// 清理指定 workId 的工作目录（用于取消任务时清理中间文件）
|
||
public func cleanupWork(workId: UUID) async {
|
||
cacheManager.removeWorkDir(workId: workId)
|
||
}
|
||
|
||
public func buildSaveValidate(
|
||
workId: UUID = UUID(),
|
||
sourceVideoURL: URL,
|
||
coverImageURL: URL? = nil,
|
||
exportParams: ExportParams = ExportParams(),
|
||
progress: (@Sendable (LivePhotoBuildProgress) -> Void)? = nil
|
||
) async throws -> LivePhotoWorkflowResult {
|
||
let output = try await builder.buildResources(
|
||
workId: workId,
|
||
sourceVideoURL: sourceVideoURL,
|
||
coverImageURL: coverImageURL,
|
||
exportParams: exportParams,
|
||
progress: progress
|
||
)
|
||
|
||
progress?(LivePhotoBuildProgress(stage: .validate, fraction: 0))
|
||
let resourceOK = await validator.canCreateLivePhotoFromResources(
|
||
photoURL: output.pairedImageURL,
|
||
pairedVideoURL: output.pairedVideoURL
|
||
)
|
||
progress?(LivePhotoBuildProgress(stage: .validate, fraction: 0.3))
|
||
|
||
let addOnlyStatus = await albumWriter.requestAddOnlyAuthorization()
|
||
guard addOnlyStatus == .authorized else {
|
||
throw AppError(
|
||
code: "LPB-401",
|
||
stage: .saveToAlbum,
|
||
message: "无相册写入权限",
|
||
underlyingErrorDescription: "authorizationStatus(addOnly)=\(addOnlyStatus)",
|
||
suggestedActions: ["在系统设置中允许“添加照片”权限"]
|
||
)
|
||
}
|
||
|
||
progress?(LivePhotoBuildProgress(stage: .saveToAlbum, fraction: 0))
|
||
let assetId = try await albumWriter.saveLivePhoto(
|
||
photoURL: output.pairedImageURL,
|
||
pairedVideoURL: output.pairedVideoURL,
|
||
shouldMoveFiles: false
|
||
)
|
||
progress?(LivePhotoBuildProgress(stage: .saveToAlbum, fraction: 1))
|
||
|
||
var isLiveSubtype: Bool? = nil
|
||
let readWriteStatus = PHPhotoLibrary.authorizationStatus(for: .readWrite)
|
||
if readWriteStatus == .authorized || readWriteStatus == .limited {
|
||
isLiveSubtype = await validator.isLivePhotoAsset(localIdentifier: assetId)
|
||
}
|
||
progress?(LivePhotoBuildProgress(stage: .validate, fraction: 1))
|
||
|
||
return LivePhotoWorkflowResult(
|
||
workId: output.workId,
|
||
assetIdentifier: output.assetIdentifier,
|
||
pairedImageURL: output.pairedImageURL,
|
||
pairedVideoURL: output.pairedVideoURL,
|
||
savedAssetId: assetId,
|
||
resourceValidationOK: resourceOK,
|
||
libraryAssetIsLivePhoto: isLiveSubtype
|
||
)
|
||
}
|
||
}
|