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[ALF] Add LiveAPI video sample #2724
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a388739
[ALF] Add LiveAPI video sample
rlazo b797bed
Actually runs this time
rlazo cb09306
Point to the right screen
rlazo a64723b
feat: Implement camera frame capture and logging
rlazo d4a71ff
Additional changes not captured by the previous commit
rlazo 6c59bf4
Capture audio
rlazo 1d0a1ca
Reorg code
rlazo dba04b3
Permissions correctly requested
rlazo af5b172
Format new files using ktfmt
rlazo 1fae483
Better naming
rlazo a613fda
Suppress unnecessary lints
rlazo ea0577a
bump versions
rlazo 904fcd9
additional lint fixes
rlazo 1db6a38
Add entries to top level libs.versions.toml
rlazo 5d53fdd
Merge branch 'master' into rl.bidi.video
rlazo d9c46f5
Update libs.versions.toml
rlazo bdadb69
Update firebaseBom and firebase-ai version references
rlazo 9747284
Update firebase-ai/app/build.gradle.kts
rlazo 9bdf3a2
Fix manifest
rlazo db4e94d
Merge branch 'master' into rl.bidi.video
rlazo cb9b82d
Update firebase-ai/app/src/main/java/com/google/firebase/quickstart/a…
rlazo bddda01
Remove duplicated entries
rlazo c402fb8
Merge branch 'master' into rl.bidi.video
rlazo 1840581
Fixed toml file
rlazo 1114777
Yet another fix to the toml file
rlazo fabfe36
Fix error introduced during merge
rlazo f78f12b
Missing closing bracket
rlazo File filter
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98 changes: 98 additions & 0 deletions
98
firebase-ai/app/src/main/java/com/google/firebase/quickstart/ai/feature/live/CameraView.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| package com.google.firebase.quickstart.ai.feature.live | ||
|
|
||
| import android.annotation.SuppressLint | ||
| import android.graphics.Bitmap | ||
| import androidx.camera.core.CameraSelector | ||
| import androidx.camera.core.ImageAnalysis | ||
| import androidx.camera.core.ImageProxy | ||
| import androidx.camera.core.Preview | ||
| import androidx.camera.lifecycle.ProcessCameraProvider | ||
| import androidx.camera.view.PreviewView | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.platform.LocalContext | ||
| import androidx.compose.ui.platform.LocalLifecycleOwner | ||
| import androidx.compose.ui.viewinterop.AndroidView | ||
| import androidx.core.content.ContextCompat | ||
| import androidx.lifecycle.LifecycleOwner | ||
| import kotlin.time.Duration.Companion.seconds | ||
|
|
||
| @Composable | ||
| fun CameraView( | ||
| modifier: Modifier = Modifier, | ||
| cameraSelector: CameraSelector = CameraSelector.DEFAULT_BACK_CAMERA, | ||
| onFrameCaptured: (Bitmap) -> Unit, | ||
| ) { | ||
| val context = LocalContext.current | ||
| val lifecycleOwner = LocalLifecycleOwner.current | ||
| val cameraProviderFuture = remember { ProcessCameraProvider.getInstance(context) } | ||
|
|
||
| AndroidView( | ||
| factory = { ctx -> | ||
| val previewView = PreviewView(ctx) | ||
| val executor = ContextCompat.getMainExecutor(ctx) | ||
| cameraProviderFuture.addListener( | ||
| { | ||
| val cameraProvider = cameraProviderFuture.get() | ||
| bindPreview( | ||
| lifecycleOwner, | ||
| previewView, | ||
| cameraProvider, | ||
| cameraSelector, | ||
| onFrameCaptured, | ||
| ) | ||
| }, | ||
| executor, | ||
| ) | ||
| previewView | ||
| }, | ||
| modifier = modifier, | ||
| ) | ||
| } | ||
|
|
||
| private fun bindPreview( | ||
| lifecycleOwner: LifecycleOwner, | ||
| previewView: PreviewView, | ||
| cameraProvider: ProcessCameraProvider, | ||
| cameraSelector: CameraSelector, | ||
| onFrameCaptured: (Bitmap) -> Unit, | ||
| ) { | ||
| val preview = | ||
| Preview.Builder().build().also { it.setSurfaceProvider(previewView.surfaceProvider) } | ||
|
|
||
| val imageAnalysis = | ||
| ImageAnalysis.Builder() | ||
| .setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST) | ||
| .build() | ||
| .also { | ||
| it.setAnalyzer( | ||
| ContextCompat.getMainExecutor(previewView.context), | ||
| SnapshotFrameAnalyzer(onFrameCaptured), | ||
| ) | ||
| } | ||
|
|
||
| cameraProvider.unbindAll() | ||
| cameraProvider.bindToLifecycle(lifecycleOwner, cameraSelector, preview, imageAnalysis) | ||
| } | ||
|
|
||
| // Calls the [onFrameCaptured] callback with the captured frame every second. | ||
| private class SnapshotFrameAnalyzer(private val onFrameCaptured: (Bitmap) -> Unit) : | ||
| ImageAnalysis.Analyzer { | ||
| private var lastFrameTimestamp = 0L | ||
| private val interval = 1.seconds // 1 second | ||
|
|
||
| @SuppressLint("UnsafeOptInUsageError") | ||
| override fun analyze(image: ImageProxy) { | ||
| val currentTimestamp = System.currentTimeMillis() | ||
| if (lastFrameTimestamp == 0L) { | ||
| lastFrameTimestamp = currentTimestamp | ||
| } | ||
|
|
||
| if (currentTimestamp - lastFrameTimestamp >= interval.inWholeMilliseconds) { | ||
| onFrameCaptured(image.toBitmap()) | ||
| lastFrameTimestamp = currentTimestamp | ||
| } | ||
| image.close() | ||
| } | ||
| } |
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