Merge pull request #1978 from noho501/feature/add_custom_capture_completed_callback

Add custom onCaptureCompleted callback to expose realtime camera metadata (ISO, WB, Exposure…)

Author: pedroSG94

encoder/src/main/java/com/pedro/encoder/input/sources/video/Camera2Source.kt

@@ -18,9 +18,11 @@ package com.pedro.encoder.input.sources.video
 
 import android.content.Context
 import android.graphics.SurfaceTexture
+import android.hardware.camera2.CameraCaptureSession
 import android.hardware.camera2.CameraCharacteristics
 import android.hardware.camera2.CameraManager
 import android.hardware.camera2.CaptureRequest
+import android.hardware.camera2.TotalCaptureResult
 import android.os.Build
 import android.util.Range
 import android.util.Size
@@ -312,4 +314,10 @@ class Camera2Source(context: Context): VideoSource() {
   fun setCustomRequest(request: (CaptureRequest.Builder) -> Unit): Boolean {
     return camera.setCustomRequest(request)
   }
+
+  fun setCustomOnCaptureCompletedCallback(
+    callback: ((CameraCaptureSession, CaptureRequest, TotalCaptureResult) -> Unit)?
+  ) {
+    camera.setCustomOnCaptureCompletedCallback(callback)
+  }
 }

encoder/src/main/java/com/pedro/encoder/input/video/Camera2ApiManager.kt

@@ -117,6 +117,8 @@ class Camera2ApiManager(context: Context) : CameraDevice.StateCallback() {
     private var imageReader: ImageReader? = null
     private var availabilityCallback: CameraManager.AvailabilityCallback? = null
 
+    private var customCaptureCompletedCallback: ((session: CameraCaptureSession, request: CaptureRequest, result: TotalCaptureResult) -> Unit)? = null
+
     init {
         cameraId = try { getCameraIdForFacing(Facing.BACK) } catch (_: Exception) { "0" }
     }
@@ -161,7 +163,7 @@ class Camera2ApiManager(context: Context) : CameraDevice.StateCallback() {
                     try {
                         it.setRepeatingRequest(
                             captureRequest,
-                            if (faceDetectionEnabled || frameCapturedCallback != null) cb else null,
+                            if (faceDetectionEnabled || frameCapturedCallback != null || customCaptureCompletedCallback != null) cb else null,
                             cameraHandler
                         )
                     } catch (_: IllegalStateException) {
@@ -203,6 +205,12 @@ class Camera2ApiManager(context: Context) : CameraDevice.StateCallback() {
         return applyRequest(builderInputSurface)
     }
 
+    fun setCustomOnCaptureCompletedCallback(
+        callback: ((CameraCaptureSession, CaptureRequest, TotalCaptureResult) -> Unit)?
+    ) {
+        this.customCaptureCompletedCallback = callback
+    }
+
     fun getSupportedFps(size: Size?, facing: Facing): List<Range<Int>> {
         try {
             val characteristics = cameraManager.getCameraCharacteristics(getCameraIdForFacing(facing))
@@ -321,7 +329,7 @@ class Camera2ApiManager(context: Context) : CameraDevice.StateCallback() {
         try {
             cameraCaptureSession.setRepeatingRequest(
                 builder.build(),
-                if (faceDetectionEnabled || frameCapturedCallback != null) cb else null, null
+                if (faceDetectionEnabled || frameCapturedCallback != null || customCaptureCompletedCallback != null) cb else null, null
             )
             return true
         } catch (e: Exception) {
@@ -681,6 +689,8 @@ class Camera2ApiManager(context: Context) : CameraDevice.StateCallback() {
             request: CaptureRequest,
             result: TotalCaptureResult
         ) {
+            customCaptureCompletedCallback?.invoke(session, request, result)
+
             val faces = result.get(CaptureResult.STATISTICS_FACES) ?: return
             faceDetectorCallback?.onGetFaces(
                 faces = mapCamera2Faces(faces = faces),