import {
Button, CaptureVideoPreviewView, HStack, Image,
Navigation, NavigationStack, Script, Spacer, Text, Toolbar, ToolbarItem,
useEffect, useMemo, useObservable, VStack
} from "scripting"
type Shot = {
index: number
image: UIImage
photoSize: string
/** native 写盘的原始 still bytes(HEIC/JPEG),含 Live Photo asset identifier */
photoURL?: string
movieURL?: string
movieSize?: number
ms: number
isDeferredProxy: boolean
}
function View() {
const dismiss = Navigation.useDismiss()
const isRunning = useObservable(false)
const shots = useObservable<Shot[]>([])
const captureCount = useObservable(0)
const lastError = useObservable("")
const livePhotoSupp = useObservable(false)
const livePhotoEn = useObservable(false)
const { session, camera, photoOutput } = useMemo(() => {
const camera = AVCaptureDevice.default("video")!
const session = new AVCaptureSession()
const input = new AVCaptureDeviceInput(camera)
const photoOutput = new AVCapturePhotoOutput()
session.configure(() => {
session.sessionPreset = "photo"
if (session.canAddInput(input)) session.addInput(input)
if (session.canAddOutput(photoOutput)) session.addOutput(photoOutput)
})
// 必须在 addOutput 之后查 supported,在那之前 photoOutput 没绑 session 时 supported=false。
return { session, camera, photoOutput }
}, [])
useEffect(() => {
async function start() {
try {
await session.startRunning()
isRunning.setValue(true)
// Live Photo 必须开启 enabled 之后才会真正生效。
photoOutput.isLivePhotoCaptureEnabled = true
// 读回真实值: 不支持的设备 setter 会被 clamp 回 false。
livePhotoSupp.setValue(photoOutput.isLivePhotoCaptureSupported)
livePhotoEn.setValue(photoOutput.isLivePhotoCaptureEnabled)
console.log("[startRunning]", {
preset: session.sessionPreset,
liveSupp: photoOutput.isLivePhotoCaptureSupported,
liveEn: photoOutput.isLivePhotoCaptureEnabled,
})
} catch (e) {
await Dialog.alert({ message: `Failed to start: ${String(e)}` })
dismiss()
}
}
start()
return () => {
session.stopRunning().finally(() => session.dispose())
}
}, [])
async function takeLivePhoto() {
const idx = captureCount.value + 1
captureCount.setValue(idx)
const ts = Date.now()
// 同时让 native 写盘 still + .mov。两份文件共享 Apple Maker Note 里的
// Live Photo asset identifier, Photos.saveLivePhoto 才能 pair 上。
const photoFile = `${FileManager.documentsDirectory}/live_${idx}_${ts}.heic`
const movieFile = `${FileManager.documentsDirectory}/live_${idx}_${ts}.mov`
const start = Date.now()
try {
const result = await photoOutput.capturePhoto({
codec: "hevc",
photoFile,
livePhotoMovieFile: movieFile,
livePhotoVideoCodec: "hevc",
})
const ms = Date.now() - start
// 读 movie 文件大小供 UI 显示
let movieSize: number | undefined
if (result.livePhotoMovieFileURL) {
try {
const stat = await FileManager.stat(result.livePhotoMovieFileURL)
movieSize = stat.size
} catch { /* ignore */ }
}
shots.setValue([{
index: idx,
image: result.image,
photoSize: `${result.image.width}×${result.image.height}`,
photoURL: result.photoFileURL,
movieURL: result.livePhotoMovieFileURL,
movieSize,
ms,
isDeferredProxy: result.isDeferredProxy,
}, ...shots.value].slice(0, 6))
lastError.setValue("")
} catch (e) {
lastError.setValue(String(e))
}
}
/** 不开 Live Photo,验证退化路径:resolve 不应包含 livePhotoMovieFileURL */
async function takeRegular() {
const idx = captureCount.value + 1
captureCount.setValue(idx)
const start = Date.now()
try {
const result = await photoOutput.capturePhoto({ codec: "hevc" })
shots.setValue([{
index: idx,
image: result.image,
photoSize: `${result.image.width}×${result.image.height}`,
movieURL: result.livePhotoMovieFileURL, // 应为 undefined
ms: Date.now() - start,
isDeferredProxy: result.isDeferredProxy,
}, ...shots.value].slice(0, 6))
lastError.setValue("")
} catch (e) {
lastError.setValue(String(e))
}
}
/**
* 把最新一张 Live Photo 配对存进系统照片库。
* 关键: `imagePath` 必须用 native 写盘的 `result.photoFileURL`(原始 HEIC,
* 含 Apple Maker Note 里的 Live Photo asset identifier),用 toJPEGData 重编码
* 出来的 JPEG 会丢这个 identifier, Photos.saveLivePhoto 报 PHPhotosError 3302。
* `shouldMoveFile: true` 会把磁盘上两个文件 move 进 Photos,本地副本就消失了。
*/
async function saveLast() {
const last = shots.value[0]
if (!last) {
lastError.setValue("Capture a Live Photo first")
return
}
if (!last.photoURL || !last.movieURL) {
lastError.setValue("Last capture missing photoURL or movieURL (was it a Regular shot?)")
return
}
try {
await Photos.saveLivePhoto({
imagePath: last.photoURL,
videoPath: last.movieURL,
shouldMoveFile: true,
})
lastError.setValue(`Saved Live Photo #${last.index} to Photos library`)
} catch (e) {
lastError.setValue(`Save failed: ${String(e)}`)
console.error(e)
}
}
/** 故意关掉 enabled 再调 Live Photo,期望 promise reject */
async function probeReject() {
photoOutput.isLivePhotoCaptureEnabled = false
livePhotoEn.setValue(photoOutput.isLivePhotoCaptureEnabled)
try {
await photoOutput.capturePhoto({
livePhotoMovieFile: `${FileManager.documentsDirectory}/should_reject.mov`,
})
lastError.setValue("Unexpected: did not reject")
} catch (e) {
lastError.setValue(`OK (rejected): ${String(e)}`)
} finally {
// 恢复 enabled 方便继续测
photoOutput.isLivePhotoCaptureEnabled = true
livePhotoEn.setValue(photoOutput.isLivePhotoCaptureEnabled)
}
}
return (
<NavigationStack>
<VStack
navigationTitle="Live Photo capture"
toolbar={
<Toolbar>
<ToolbarItem placement="topBarTrailing">
<Button title="Done" systemImage="xmark" action={dismiss} />
</ToolbarItem>
</Toolbar>
}
>
<CaptureVideoPreviewView
session={session}
videoDevice={camera}
videoGravity="resizeAspectFill"
frame={{ height: 280 }}
cornerRadius={12}
masksToBounds
/>
<VStack alignment="leading" spacing={4} padding={8}>
<Text font="caption">Status</Text>
<Text font="footnote">
running: {String(isRunning.value)} · liveSupp: {String(livePhotoSupp.value)} · liveEn: {String(livePhotoEn.value)}
</Text>
{lastError.value ? (
<Text font="footnote" foregroundStyle="red">
{lastError.value}
</Text>
) : null}
</VStack>
<HStack padding={8} spacing={10}>
<Button title="Live Photo" action={takeLivePhoto} />
<Button title="Regular" action={takeRegular} />
<Button title="Save last" action={saveLast} />
<Button title="Probe reject" action={probeReject} />
<Spacer />
<Text font="footnote" foregroundStyle="secondaryLabel">
shots: {captureCount.value}
</Text>
</HStack>
{shots.value[0] ? (
<Image
image={shots.value[0].image}
resizable
scaleToFit
frame={{ height: 140 }}
/>
) : null}
<VStack alignment="leading" spacing={2} padding={8}>
<Text font="caption">Recent captures (newest first)</Text>
{shots.value.map(s => (
<Text key={s.index} font="footnote">
#{s.index} · {s.ms}ms · {s.photoSize}
{s.isDeferredProxy ? " · proxy" : ""}
{s.movieURL
? ` · mov ${s.movieSize ? Math.round(s.movieSize / 1024) + "KB" : "?"}`
: " · no .mov"}
</Text>
))}
</VStack>
</VStack>
</NavigationStack>
)
}
async function run() {
await Navigation.present({ element: <View /> })
Script.exit()
}
run()
