Tweak things to make segments a bit more regular

Reviewed-on: #3
Reviewed-by: Ivan Malison <ivanmalison@gmail.com>

package/android/src/main/java/com/mrousavy/camera/CameraView+RecordVideo.kt

@@ -13,7 +13,7 @@ import com.mrousavy.camera.types.RecordVideoOptions
 import com.mrousavy.camera.utils.makeErrorMap
 import java.util.*
 
-suspend fun CameraView.startRecording(options: RecordVideoOptions, onRecordCallback: Callback) {
+suspend fun CameraView.startRecording(options: RecordVideoOptions, filePath: String, onRecordCallback: Callback) {
   // check audio permission
   if (audio == true) {
     if (ContextCompat.checkSelfPermission(context, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
@@ -33,7 +33,7 @@ suspend fun CameraView.startRecording(options: RecordVideoOptions, onRecordCallb
     val errorMap = makeErrorMap(error.code, error.message)
     onRecordCallback(null, errorMap)
   }
-  cameraSession.startRecording(audio == true, options, callback, onError)
+  cameraSession.startRecording(audio == true, options, filePath, callback, onError)
 }
 
 @SuppressLint("RestrictedApi")

package/android/src/main/java/com/mrousavy/camera/CameraViewModule.kt

@@ -95,12 +95,12 @@ class CameraViewModule(reactContext: ReactApplicationContext) : ReactContextBase
 
   // TODO: startRecording() cannot be awaited, because I can't have a Promise and a onRecordedCallback in the same function. Hopefully TurboModules allows that
   @ReactMethod
-  fun startRecording(viewTag: Int, jsOptions: ReadableMap, onRecordCallback: Callback) {
+  fun startRecording(viewTag: Int, jsOptions: ReadableMap, filePath: String, onRecordCallback: Callback) {
     coroutineScope.launch {
       val view = findCameraView(viewTag)
       try {
         val options = RecordVideoOptions(jsOptions)
-        view.startRecording(options, onRecordCallback)
+        view.startRecording(options, filePath, onRecordCallback)
       } catch (error: CameraError) {
         val map = makeErrorMap("${error.domain}/${error.id}", error.message, error)
         onRecordCallback(null, map)

package/android/src/main/java/com/mrousavy/camera/core/CameraSession.kt

@@ -621,6 +621,7 @@ class CameraSession(private val context: Context, private val cameraManager: Cam
   suspend fun startRecording(
     enableAudio: Boolean,
     options: RecordVideoOptions,
+    filePath: String,
     callback: (video: RecordingSession.Video) -> Unit,
     onError: (error: CameraError) -> Unit
   ) {
@@ -640,6 +641,7 @@ class CameraSession(private val context: Context, private val cameraManager: Cam
         videoOutput.enableHdr,
         orientation,
         options,
+        filePath,
         callback,
         onError,
         this.callback,

package/android/src/main/java/com/mrousavy/camera/core/ChunkedRecorder.kt

@@ -12,26 +12,31 @@ import com.mrousavy.camera.types.Orientation
 import com.mrousavy.camera.types.RecordVideoOptions
 import java.io.File
 import java.nio.ByteBuffer
+import kotlin.math.ceil
 
-class ChunkedRecordingManager(private val encoder: MediaCodec, private val outputDirectory: File, private val orientationHint: Int, private val iFrameInterval: Int, private val callbacks: CameraSession.Callback) :
+class ChunkedRecordingManager(private val encoder: MediaCodec, private val outputDirectory: File, private val orientationHint: Int, private val iFrameInterval: Float, private val callbacks: CameraSession.Callback) :
   MediaCodec.Callback() {
   companion object {
     private const val TAG = "ChunkedRecorder"
 
+    private fun roundIntervalLengthUp(fps: Float, interval: Float): Float {
+      return ceil(fps * interval) / fps
+    }
+
     fun fromParams(
       callbacks: CameraSession.Callback,
       size: Size,
       enableAudio: Boolean,
-      fps: Int? = null,
+      fps: Float = 30.0f,
       cameraOrientation: Orientation,
       bitRate: Int,
       options: RecordVideoOptions,
       outputDirectory: File,
-      iFrameInterval: Int = 5
+      iFrameInterval: Float = 5.0f
     ): ChunkedRecordingManager {
       val mimeType = options.videoCodec.toMimeType()
       val cameraOrientationDegrees = cameraOrientation.toDegrees()
-      val recordingOrientationDegrees = (options.orientation ?: Orientation.PORTRAIT).toDegrees();
+      val recordingOrientationDegrees = (options.orientation ?: Orientation.PORTRAIT).toDegrees()
       val (width, height) = if (cameraOrientation.isLandscape()) {
         size.height to size.width
       } else {
@@ -42,25 +47,25 @@ class ChunkedRecordingManager(private val encoder: MediaCodec, private val outpu
 
       val codec = MediaCodec.createEncoderByType(mimeType)
 
+      val roundedInterval = roundIntervalLengthUp(fps, iFrameInterval)
+
       // Set some properties. Failing to specify some of these can cause the MediaCodec
       // configure() call to throw an unhelpful exception.
       format.setInteger(
         MediaFormat.KEY_COLOR_FORMAT,
         MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface
       )
-      fps?.apply {
-        format.setInteger(MediaFormat.KEY_FRAME_RATE, this)
-      }
+      format.setFloat(MediaFormat.KEY_FRAME_RATE, fps)
       // TODO: Pull this out into configuration
-      format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, iFrameInterval)
+      format.setFloat(MediaFormat.KEY_I_FRAME_INTERVAL, roundedInterval)
       format.setInteger(MediaFormat.KEY_BIT_RATE, bitRate)
 
-      Log.d(TAG, "Video Format: $format, camera orientation $cameraOrientationDegrees, recordingOrientation: $recordingOrientationDegrees")
+      Log.d(TAG, "Video Format: $format, camera orientation $cameraOrientationDegrees, recordingOrientation: $recordingOrientationDegrees, Set fps: $fps")
       // Create a MediaCodec encoder, and configure it with our format.  Get a Surface
       // we can use for input and wrap it with a class that handles the EGL work.
       codec.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE)
       return ChunkedRecordingManager(
-        codec, outputDirectory, recordingOrientationDegrees, iFrameInterval, callbacks
+        codec, outputDirectory, recordingOrientationDegrees, roundedInterval, callbacks
       )
     }
   }
@@ -69,7 +74,7 @@ class ChunkedRecordingManager(private val encoder: MediaCodec, private val outpu
   private var currentFrameNumber: Int = 0
   private var chunkIndex = -1
   private var encodedFormat: MediaFormat? = null
-  private var recording = false;
+  private var recording = false
 
   private val targetDurationUs = iFrameInterval * 1000000
 
@@ -83,15 +88,15 @@ class ChunkedRecordingManager(private val encoder: MediaCodec, private val outpu
   }
 
   // Muxer specific
-  private class MuxerContext(val muxer: MediaMuxer, val filepath: File, val chunkIndex: Int, startTimeUs: Long, encodedFormat: MediaFormat) {
+  private class MuxerContext(
+    val muxer: MediaMuxer, val filepath: File, val chunkIndex: Int,
+    val startTimeUs: Long, encodedFormat: MediaFormat
+  ) {
     val videoTrack: Int = muxer.addTrack(encodedFormat)
-    val startTimeUs: Long = startTimeUs
 
     init {
       muxer.start()
     }
-
-
     fun finish() {
       muxer.stop()
       muxer.release()
@@ -146,7 +151,7 @@ class ChunkedRecordingManager(private val encoder: MediaCodec, private val outpu
   override fun onInputBufferAvailable(codec: MediaCodec, index: Int) {
   }
 
-  override fun onOutputBufferAvailable(codec: MediaCodec, index: Int, bufferInfo: MediaCodec.BufferInfo) {
+  override fun onOutputBufferAvailable(codec: MediaCodec, index: Int, bufferInfo: BufferInfo) {
     synchronized(this) {
       if (!recording) {
         return

package/android/src/main/java/com/mrousavy/camera/core/RecordingSession.kt

@@ -23,6 +23,7 @@ class RecordingSession(
   private val hdr: Boolean = false,
   private val cameraOrientation: Orientation,
   private val options: RecordVideoOptions,
+  private val filePath: String,
   private val callback: (video: Video) -> Unit,
   private val onError: (error: CameraError) -> Unit,
   private val allCallbacks: CameraSession.Callback,
@@ -37,19 +38,14 @@ class RecordingSession(
 
   data class Video(val path: String, val durationMs: Long, val size: Size)
 
-  private val outputPath = run {
-    val videoDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES)
-    val sdf = SimpleDateFormat("yyyy_MM_dd_HH_mm_ss_SSS", Locale.US)
-    val videoFileName = "VID_${sdf.format(Date())}"
-    File(videoDir!!, videoFileName)
-  }
+  private val outputPath: File = File(filePath)
 
   private val bitRate = getBitRate()
   private val recorder = ChunkedRecordingManager.fromParams(
     allCallbacks,
     size,
     enableAudio,
-    fps,
+    (fps ?: 30).toFloat(),
     cameraOrientation,
     bitRate,
     options,

package/src/Camera.tsx

@@ -173,7 +173,7 @@ export class Camera extends React.PureComponent<CameraProps, CameraState> {
    * }, 5000)
    * ```
    */
-	public startRecording(options: RecordVideoOptions): void {
+  public startRecording(options: RecordVideoOptions, filePath: string): void {
     const { onRecordingError, onRecordingFinished, videoBitRate, ...passThruOptions } = options
     if (typeof onRecordingError !== 'function' || typeof onRecordingFinished !== 'function')
       throw new CameraRuntimeError('parameter/invalid-parameter', 'The onRecordingError or onRecordingFinished functions were not set!')
@@ -207,7 +207,7 @@ export class Camera extends React.PureComponent<CameraProps, CameraState> {
     }
     try {
       // TODO: Use TurboModules to make this awaitable.
-			CameraModule.startRecording(this.handle, nativeOptions, onRecordCallback)
+      CameraModule.startRecording(this.handle, nativeOptions, filePath, onRecordCallback)
     } catch (e) {
       throw tryParseNativeCameraError(e)
     }