540 lines
25 KiB
Kotlin
540 lines
25 KiB
Kotlin
/**
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* @file BowlingCameraActivity.kt
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* @brief Camera screen Activity: owns the ViewModel, wires user actions to the camera controller, and reflects state onto views.
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*/
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package com.example.jnicpp.bowling
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import android.content.Intent
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import android.content.pm.ActivityInfo
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import android.net.Uri
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import android.os.Bundle
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import android.util.Log
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import android.view.View
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import android.widget.Toast
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import androidx.activity.result.contract.ActivityResultContracts
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import androidx.activity.viewModels
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import androidx.appcompat.app.AppCompatActivity
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import androidx.camera.core.CameraSelector
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import androidx.core.content.ContextCompat
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import androidx.lifecycle.Lifecycle
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import androidx.lifecycle.lifecycleScope
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import androidx.lifecycle.repeatOnLifecycle
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import com.example.jnicpp.R
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import com.example.jnicpp.databinding.ActivityBowlingCameraBinding
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import com.google.mlkit.vision.pose.PoseLandmark
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import kotlinx.coroutines.flow.combine
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import kotlinx.coroutines.launch
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import java.util.Locale
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import java.util.concurrent.ExecutorService
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import java.util.concurrent.Executors
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/**
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* @brief Screen that records video and runs real-time pose detection on the same camera stream.
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*
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* This is a standalone entry point for now (see the plan this was built
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* from) -- it isn't wired into a menu/game-state system yet.
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*
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* This class intentionally does *not* contain any CameraX/ML Kit binding
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* logic itself -- that lives in [CameraXController] (use-case binding) and
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* [PoseAnalyzer] (per-frame inference), both plain classes that don't touch
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* Android component lifecycle. This class's job is just: own the executor,
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* own the ViewModel, wire user actions to the controller, and reflect
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* [CameraViewModel]'s state back onto the views.
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*/
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class BowlingCameraActivity : AppCompatActivity(), CameraXController.Callback {
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companion object {
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private const val TAG = "BowlingCameraActivity"
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// This app is built around a 5-step approach: the bowler is in
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// their "final position" (planted/sliding, about to swing through
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// and release) the moment the 5th foot-plant of the current attempt
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// is detected. Step counting itself is LiveStepDetector's job (via
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// CameraViewModel.stepEvents) -- this just interprets that count for
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// the live banner below.
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private const val FINAL_STEP_COUNT = 5
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}
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private lateinit var binding: ActivityBowlingCameraBinding
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private val viewModel: CameraViewModel by viewModels()
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private lateinit var cameraExecutor: ExecutorService
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private lateinit var cameraXController: CameraXController
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private var lensFacing = CameraSelector.LENS_FACING_BACK
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// Throttled diagnostic for step-count troubleshooting: confirms whether
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// ankles are actually clearing PoseSkeletonRenderer.MIN_LIKELIHOOD, since
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// LiveStepDetector silently sees nothing for a foot until they do.
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private var lastLandmarkLogMs = 0L
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// Richer, un-throttled per-frame trace of the same troubleshooting data,
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// written to a file instead of Logcat -- see DebugSessionLogger's class
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// doc. Open only while a recording is in progress.
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private lateinit var debugSessionLogger: DebugSessionLogger
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// Rendering for the step-counter card --
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// see StepCounterUiController's class doc for why this isn't just
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// inline here.
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private lateinit var stepCounterUi: StepCounterUiController
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// class for FeedbackUI
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private lateinit var feedbackUI: FeedbackUI
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private val permissionLauncher =
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registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) { _: Map<String, Boolean> ->
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val granted = CameraPermissions.allGranted(this)
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viewModel.onPermissionsResult(granted)
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if (granted) {
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showCameraUi()
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startCamera()
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} else {
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showPermissionRationale(showAsDenied = true)
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}
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}
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/**
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* @brief Standard Activity entry point: inflates the layout, wires up
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* click listeners and ViewModel observers, and starts the
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* camera if permissions already allow it.
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* @param savedInstanceState Previous saved state, if this is a re-creation; unused.
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*/
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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binding = ActivityBowlingCameraBinding.inflate(layoutInflater)
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setContentView(binding.root)
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cameraExecutor = Executors.newSingleThreadExecutor()
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cameraXController = CameraXController(applicationContext, cameraExecutor)
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debugSessionLogger = DebugSessionLogger(applicationContext)
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stepCounterUi = StepCounterUiController(
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cardStepCounter = binding.cardStepCounter,
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textStepCountBig = binding.textStepCountBig,
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)
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feedbackUI = FeedbackUI(binding.root)
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binding.poseOverlay.attachFeedback(feedbackUI)
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binding.btnGrantPermissions.setOnClickListener {
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permissionLauncher.launch(CameraPermissions.REQUIRED)
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}
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binding.btnRecord.setOnClickListener { onRecordClicked() }
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binding.switchPose.setOnCheckedChangeListener { _, isChecked -> viewModel.onPoseToggled(isChecked) }
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binding.btnSwitchCamera.setOnClickListener { onSwitchCameraClicked() }
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binding.btnBack.setOnClickListener { finish() }
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binding.btnEditor.setOnClickListener {
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AdminLoginPrompt.show(this) {
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startActivity(Intent(this, ParameterEditorActivity::class.java))
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}
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}
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observeViewModel()
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val granted = CameraPermissions.allGranted(this)
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viewModel.onPermissionsResult(granted)
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if (granted) {
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showCameraUi()
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startCamera()
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} else {
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showPermissionRationale(showAsDenied = false)
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}
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}
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/** @brief Binds the CameraX use cases to this Activity's lifecycle using the current [lensFacing]. */
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private fun startCamera() {
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cameraXController.bindToLifecycle(
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lifecycleOwner = this,
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previewView = binding.cameraPreview,
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callback = this,
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lensFacing = lensFacing,
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feedbackUi = feedbackUI,
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)
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}
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/** @brief Handles the record button: starts or stops recording depending on current state. */
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private fun onRecordClicked() {
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if (cameraXController.isRecording) {
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cameraXController.stopRecording()
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} else {
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// Pose mode for this recording is whatever switch_pose is
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// already set to -- see the poseEnabled collector in
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// observeViewModel(), which keeps cameraXController's live pose
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// state in sync with the toggle as it's flipped.
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viewModel.onRecordingStarting()
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cameraXController.startRecording()
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}
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}
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/**
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* @brief Handles the switch-camera button: toggles [lensFacing] and rebinds.
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*
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* If a recording is in progress, stops it first (same effect as
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* tapping Stop Recording) rather than blocking the switch outright --
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* a debug/testing convenience so trying both cameras doesn't need a
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* separate stop first. [CameraXController.Callback.onRecordingFinalized]
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* still fires asynchronously and saves the take normally, up to the
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* point it was stopped; only the new camera's stream starts fresh,
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* with no live pose/step-count carried over, same as ending any other
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* take.
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*/
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private fun onSwitchCameraClicked() {
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if (cameraXController.isRecording) {
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cameraXController.stopRecording()
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}
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lensFacing = if (lensFacing == CameraSelector.LENS_FACING_BACK) {
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CameraSelector.LENS_FACING_FRONT
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} else {
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CameraSelector.LENS_FACING_BACK
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}
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// CameraXController.bindToLifecycle() unbinds all use cases before
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// rebinding, so calling it again with the flipped lensFacing is
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// enough to switch cameras cleanly.
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if (CameraPermissions.allGranted(this)) {
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startCamera()
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}
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}
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/** @brief Collects every [CameraViewModel] StateFlow/SharedFlow and reflects each onto the views. */
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private fun observeViewModel() {
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lifecycleScope.launch {
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repeatOnLifecycle(Lifecycle.State.STARTED) {
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launch {
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viewModel.recordingState.collect { state -> renderRecordingState(state) }
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}
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launch {
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viewModel.poseEnabled.collect { enabled ->
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// Also drives the switch's checked state (idempotent
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// if the user just flipped it themselves), so it
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// reflects viewModel state after an Activity
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// recreation, e.g. on rotation.
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if (binding.switchPose.isChecked != enabled) {
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binding.switchPose.isChecked = enabled
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}
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cameraXController.setPoseDetectionEnabled(enabled)
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if (!enabled) binding.poseOverlay.clear()
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}
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}
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launch {
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viewModel.errorEvents.collect { message ->
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Toast.makeText(this@BowlingCameraActivity, message, Toast.LENGTH_LONG)
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.show()
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}
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}
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launch {
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viewModel.stepEvents.collect { events ->
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stepCounterUi.renderStepCount(events.size)
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if (events.isNotEmpty()) {
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Log.d(TAG, "Step ${events.size}: ${events.last()}")
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}
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// stepEvents is cleared back to empty on every reset
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// (new recording, or LiveStepDetector seeing the
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// bowler return to a stationary stance -- see
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// CameraViewModel.onPoseFrameUpdated), so this banner
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// naturally clears itself for the next attempt too.
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//
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// Shows every step as it's counted (not just the
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// final one) so it's obvious on screen whether
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// detection is actually seeing each footfall while
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// testing/tuning it, rather than only finding out at
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// step 5 that earlier steps were silently missed.
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if (events.isEmpty()) {
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binding.textFinalPosition.visibility = View.GONE
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} else {
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val reachedFinal = events.size >= FINAL_STEP_COUNT
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binding.textFinalPosition.visibility = View.VISIBLE
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binding.textFinalPosition.text = if (reachedFinal) {
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getString(R.string.final_position_reached)
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} else {
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getString(R.string.step_reached_format, events.size)
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}
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binding.textFinalPosition.setTextColor(
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ContextCompat.getColor(
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this@BowlingCameraActivity,
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if (reachedFinal) R.color.final_position_highlight else R.color.white,
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),
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)
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}
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}
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}
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launch {
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viewModel.poseStageFeedback.collect { feedback ->
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binding.textPoseStageFeedback.text = feedback
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binding.textPoseStageFeedback.visibility = if (feedback != null) View.VISIBLE else View.GONE
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}
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}
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// Deliberately its own collector, independent of stepEvents
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// above -- delivery-phase feedback and step counting are
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// separate concerns (see PosePhaseDetector's class doc).
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// Combined with poseEnabled (rather than posePhase alone) so
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// the label can tell "pose off" (hidden) apart from "pose on
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// but not yet in the target posture" (amber prompt) -- both
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// cases otherwise report a null phase.
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launch {
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combine(viewModel.poseEnabled, viewModel.posePhase) { enabled, phase -> enabled to phase }
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.collect { (enabled, phase) -> renderPosePhase(enabled, phase) }
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}
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// Raw angle readout backing the label above -- its own
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// collector since it's driven by a separate StateFlow
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// (poseMetrics is null on its own whenever pose detection is
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// off, so no need to combine with poseEnabled here).
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launch {
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viewModel.poseMetrics.collect { metrics -> renderPoseMetrics(metrics) }
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}
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}
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}
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}
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/**
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* @brief Reflects [state] onto the record button, pose toggle, recording
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* indicator/timer, and screen-orientation lock.
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*
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* The screen now rotates freely (see res/layout-land/), which recreates
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* this Activity on rotation - that would orphan an in-progress
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* recording, since the [CameraXController] instance holding the active
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* recording gets torn down with it. Locking to whichever orientation
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* we're already in while Starting/Recording (and releasing the lock
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* once Idle again) keeps recordings from being interrupted by a
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* rotation mid-shot.
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*
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* @param state The recording state to render.
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*/
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private fun renderRecordingState(state: CameraViewModel.RecordingState) {
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requestedOrientation = if (state is CameraViewModel.RecordingState.Idle) {
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ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED
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} else {
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ActivityInfo.SCREEN_ORIENTATION_LOCKED
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}
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when (state) {
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is CameraViewModel.RecordingState.Idle -> {
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binding.layoutRecordingIndicator.visibility = View.GONE
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stepCounterUi.setVisible(visible = false)
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binding.btnRecord.isEnabled = true
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binding.btnRecord.setText(R.string.record)
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// Pose mode can only be changed between recordings, not
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// mid-flight -- see setPoseDetectionEnabled()'s doc comment.
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binding.switchPose.isEnabled = true
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stepCounterUi.resetTracking()
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// A tuning change only takes effect on the *next* recording
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// (see ParameterEditorActivity's class doc), so only offer
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// it while there isn't one already in progress.
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binding.btnEditor.visibility = View.VISIBLE
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}
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is CameraViewModel.RecordingState.Starting -> {
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// Can't stop a recording that hasn't started yet, and pose
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// mode for it is already locked in.
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binding.btnRecord.isEnabled = false
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binding.switchPose.isEnabled = false
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binding.btnEditor.visibility = View.GONE
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}
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is CameraViewModel.RecordingState.Recording -> {
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binding.btnRecord.isEnabled = true
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binding.btnRecord.setText(R.string.stop_recording)
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binding.switchPose.isEnabled = false
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binding.layoutRecordingIndicator.visibility = View.VISIBLE
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stepCounterUi.setVisible(visible = true)
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binding.btnEditor.visibility = View.GONE
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val minutes = state.elapsedSeconds / 60
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val seconds = state.elapsedSeconds % 60
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binding.textTimer.text = String.format(Locale.US, "%02d:%02d", minutes, seconds)
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}
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}
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}
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/**
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* @brief Shows or hides the delivery-phase feedback label, and colors/labels
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* it for whether [phase] currently validates.
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*
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* Visible for the entire time [poseEnabled] is on -- not just at the
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* moment a phase is confirmed -- so the bowler gets a continuous
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* "not yet"/"confirmed" signal to line themselves up against, rather
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* than a label that silently disappears whenever they drift out of
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* position. Independent of [renderRecordingState]/the step counter --
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* see [PosePhaseDetector]'s class doc for why phase feedback and step
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* counting are kept as separate concerns.
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*
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* @param poseEnabled Whether pose detection is currently on at all.
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* @param phase The bowler's current delivery phase, or null if none currently validates.
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*/
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private fun renderPosePhase(poseEnabled: Boolean, phase: BowlingPhase?) {
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if (!poseEnabled) {
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binding.textPoseFeedback.visibility = View.GONE
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return
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}
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binding.textPoseFeedback.visibility = View.VISIBLE
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// Every other BowlingPhase falls back to the "waiting" message too --
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// see PosePhaseDetector's class doc, only STARTING_STANCE is detected today.
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when (phase) {
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BowlingPhase.STARTING_STANCE -> {
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binding.textPoseFeedback.text = getString(R.string.pose_phase_starting_stance)
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binding.textPoseFeedback.setBackgroundColor(ContextCompat.getColor(this, R.color.Starting_stance_ready))
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}
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BowlingPhase.APPROACH -> {
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binding.textPoseFeedback.text = getString(R.string.pose_phase_approach)
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binding.textPoseFeedback.setBackgroundColor(ContextCompat.getColor(this, R.color.Approach_ready))
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}
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BowlingPhase.PUSHAWAY -> {
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binding.textPoseFeedback.text = getString(R.string.pose_phase_pushaway)
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binding.textPoseFeedback.setBackgroundColor(ContextCompat.getColor(this, R.color.Pushaway_ready))
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}
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BowlingPhase.BACK_SWING -> {
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binding.textPoseFeedback.text = getString(R.string.pose_phase_back_swing)
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binding.textPoseFeedback.setBackgroundColor(ContextCompat.getColor(this, R.color.Back_swing_ready))
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}
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BowlingPhase.POWER_STEP -> {
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binding.textPoseFeedback.text = getString(R.string.pose_phase_power_step)
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binding.textPoseFeedback.setBackgroundColor(ContextCompat.getColor(this, R.color.Power_step_ready))
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}
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BowlingPhase.SLIDE_AND_RELEASE -> {
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binding.textPoseFeedback.text = getString(R.string.pose_phase_slide_and_release)
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binding.textPoseFeedback.setBackgroundColor(ContextCompat.getColor(this, R.color.Slide_and_release_ready))
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}
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else -> {
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binding.textPoseFeedback.text = getString(R.string.pose_phase_waiting)
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binding.textPoseFeedback.setBackgroundColor(ContextCompat.getColor(this, R.color.Starting_stance_waiting))
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}
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}
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}
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/**
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* @brief Shows or hides the raw torso/knee/elbow angle readout backing [renderPosePhase]'s label.
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* @param metrics This frame's angle readings, or null to hide the readout (pose detection off).
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*/
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private fun renderPoseMetrics(metrics: PosePhaseDetector.Metrics?) {
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if (metrics == null) {
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binding.textPoseMetrics.visibility = View.GONE
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return
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}
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binding.textPoseMetrics.visibility = View.VISIBLE
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binding.textPoseMetrics.text = getString(
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R.string.pose_metrics_format,
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angleText(metrics.torsoTiltDegrees),
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angleText(metrics.leftKneeAngleDegrees),
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angleText(metrics.rightKneeAngleDegrees),
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angleText(metrics.leftElbowAngleDegrees),
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angleText(metrics.rightElbowAngleDegrees),
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)
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}
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/**
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* @brief Formats one angle reading for display.
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* @param degrees The angle in degrees, or null if that landmark wasn't confidently detected this frame.
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* @return e.g. "12°", or "--" if [degrees] is null.
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*/
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private fun angleText(degrees: Float?): String =
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if (degrees == null) "--" else "${degrees.toInt()}°"
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/** @brief Hides the permission-rationale screen, revealing the camera UI underneath. */
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private fun showCameraUi() {
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binding.layoutPermissionRationale.visibility = View.GONE
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}
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/**
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* @brief Shows the permission-rationale screen with either the initial
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* ask or the post-denial message.
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* @param showAsDenied true to show the "permission denied" message, false for the initial rationale.
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*/
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private fun showPermissionRationale(showAsDenied: Boolean) {
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binding.layoutPermissionRationale.visibility = View.VISIBLE
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binding.textPermissionMessage.setText(
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if (showAsDenied) R.string.permission_denied_message else R.string.permission_rationale_message,
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)
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}
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// ----- CameraXController.Callback -----
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/** @brief Hides the permission-rationale screen once the camera is bound and ready. */
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override fun onCameraReady() {
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showCameraUi()
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}
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/** @brief Surfaces a camera-binding failure to the ViewModel. @param message Human-readable failure reason. */
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override fun onCameraError(message: String) {
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viewModel.postError(getString(R.string.error_camera_unavailable, message))
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}
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/** @brief Forwards the "recording actually started" event to the ViewModel and opens the debug trace file. */
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override fun onRecordingStarted() {
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viewModel.onRecordingStarted()
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debugSessionLogger.start()
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}
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/**
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* @brief Forwards the "recording finished" event to the ViewModel,
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* closes the debug trace file, and shows the saved video's name.
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* @param outputUri Location of the saved video.
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*/
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override fun onRecordingFinalized(outputUri: Uri) {
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viewModel.onRecordingStopped()
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debugSessionLogger.stop()
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Toast.makeText(
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this,
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"${outputUri.lastPathSegment ?: outputUri.toString()} (debug trace saved to Downloads/bowling)",
|
|
Toast.LENGTH_LONG,
|
|
).show()
|
|
}
|
|
|
|
/** @brief Surfaces a recording failure to the ViewModel and closes the debug trace file. @param message Human-readable failure reason. */
|
|
override fun onRecordingError(message: String) {
|
|
viewModel.postError(getString(R.string.error_recording_failed, message))
|
|
debugSessionLogger.stop()
|
|
}
|
|
|
|
/**
|
|
* @brief Surfaces a pose-detector failure without disrupting an in-progress recording.
|
|
*
|
|
* Detector hiccups on a single frame shouldn't interrupt an
|
|
* in-progress recording -- just surface it, don't reset state.
|
|
*
|
|
* @param message Human-readable failure reason.
|
|
*/
|
|
override fun onPoseDetectorError(message: String) {
|
|
Toast.makeText(this, getString(R.string.error_pose_detector, message), Toast.LENGTH_SHORT).show()
|
|
}
|
|
|
|
/**
|
|
* @brief Receives each analyzed frame's pose result: updates the live
|
|
* overlay, forwards it to the ViewModel for buffering/step
|
|
* detection, and periodically logs landmark confidence for
|
|
* troubleshooting.
|
|
*
|
|
* Safe to touch the view directly here: ML Kit's Task listeners (see
|
|
* [PoseAnalyzer]) deliver on the main thread by default even though
|
|
* inference itself runs on the background camera executor.
|
|
*
|
|
* @param result The current frame's landmarks, angles, and image metadata.
|
|
*/
|
|
override fun onPoseResult(result: PoseAnalyzer.PoseFrameResult) {
|
|
binding.poseOverlay.update(result)
|
|
viewModel.onPoseFrameUpdated(result.landmarks, result.angles)
|
|
|
|
val frameTimestampMs = System.currentTimeMillis()
|
|
debugSessionLogger.log(
|
|
result.landmarks,
|
|
frameTimestampMs,
|
|
viewModel.stepEvents.value.size,
|
|
)
|
|
|
|
if ((frameTimestampMs - lastLandmarkLogMs) >= 1000) {
|
|
lastLandmarkLogMs = frameTimestampMs
|
|
val leftAnkle = result.landmarks[PoseLandmark.LEFT_ANKLE]
|
|
val rightAnkle = result.landmarks[PoseLandmark.RIGHT_ANKLE]
|
|
val leftHip = result.landmarks[PoseLandmark.LEFT_HIP]
|
|
val rightHip = result.landmarks[PoseLandmark.RIGHT_HIP]
|
|
val leftShoulder = result.landmarks[PoseLandmark.LEFT_SHOULDER]
|
|
val rightShoulder = result.landmarks[PoseLandmark.RIGHT_SHOULDER]
|
|
Log.d(
|
|
TAG,
|
|
"Likelihood (need >= ${PoseSkeletonRenderer.MIN_LIKELIHOOD}) -- " +
|
|
"ankle L=${leftAnkle?.inFrameLikelihood} R=${rightAnkle?.inFrameLikelihood}, " +
|
|
"hip L=${leftHip?.inFrameLikelihood} R=${rightHip?.inFrameLikelihood}, " +
|
|
"shoulder L=${leftShoulder?.inFrameLikelihood} R=${rightShoulder?.inFrameLikelihood}",
|
|
)
|
|
}
|
|
}
|
|
|
|
/** @brief Releases the camera controller, shuts down the analysis executor, and closes any open debug trace file. */
|
|
override fun onDestroy() {
|
|
super.onDestroy()
|
|
cameraXController.release()
|
|
cameraExecutor.shutdown()
|
|
debugSessionLogger.stop()
|
|
}
|
|
}
|