Feature: add MediaPlayerController

AndroidMedia/src/main/java/com/frank/androidmedia/controller/MediaPlayerController.kt

@@ -0,0 +1,94 @@
+package com.frank.androidmedia.controller
+
+import android.media.MediaPlayer
+import android.view.Surface
+import com.frank.androidmedia.listener.PlayerCallback
+import java.io.IOException
+
+/**
+ * @author xufulong
+ * @date 3/18/22 1:53 PM
+ * @desc The controller of MediaPlayer
+ */
+open class MediaPlayerController(playerCallback: PlayerCallback) {
+
+    private var mediaPlayer: MediaPlayer? = null
+    private var renderFirstFrame: Boolean = false
+    private var playerCallback: PlayerCallback? = null
+
+    init {
+        this.playerCallback = playerCallback
+    }
+
+    fun initPlayer(filePath :String, surface :Surface) {
+        if (mediaPlayer != null) {
+            releasePlayer()
+        }
+        try {
+            renderFirstFrame = false
+            mediaPlayer = MediaPlayer()
+            mediaPlayer!!.setOnPreparedListener {
+                mediaPlayer!!.start()
+                playerCallback?.onPrepare()
+            }
+            mediaPlayer!!.setOnErrorListener {
+                mp: MediaPlayer?, what: Int, extra: Int ->
+                return@setOnErrorListener playerCallback?.onError(what, extra)!!
+            }
+            mediaPlayer!!.setOnCompletionListener {
+                playerCallback?.onCompleteListener()
+            }
+            mediaPlayer!!.setOnInfoListener {
+                mp, what, extra ->  (
+                if (what == MediaPlayer.MEDIA_INFO_VIDEO_RENDERING_START) {
+                    if (!renderFirstFrame) {
+                        renderFirstFrame = true
+                        playerCallback?.onRenderFirstFrame()
+                    }
+                })
+                return@setOnInfoListener true
+            }
+            mediaPlayer!!.setDataSource(filePath)
+            mediaPlayer!!.setSurface(surface)
+            mediaPlayer!!.prepareAsync()
+        } catch (e: IOException) {
+            e.printStackTrace()
+        }
+    }
+
+    fun currentPosition() : Int {
+        if (mediaPlayer == null)
+            return 0
+        return mediaPlayer!!.currentPosition
+    }
+
+    fun duration() : Int {
+        if (mediaPlayer == null)
+            return 0
+        return mediaPlayer!!.duration
+    }
+
+    fun seekTo(position :Int) {
+        mediaPlayer?.seekTo(position)
+    }
+
+    fun togglePlay() {
+        if (mediaPlayer == null)
+            return
+
+        if (mediaPlayer!!.isPlaying) {
+            mediaPlayer!!.pause()
+        } else {
+            mediaPlayer!!.start()
+        }
+    }
+
+    fun releasePlayer() {
+        if (mediaPlayer != null) {
+            mediaPlayer!!.stop()
+            mediaPlayer!!.release()
+            mediaPlayer = null
+        }
+    }
+
+}

AndroidMedia/src/main/java/com/frank/androidmedia/listener/PlayerCallback.kt

@@ -0,0 +1,18 @@
+package com.frank.androidmedia.listener
+
+/**
+ * @author xufulong
+ * @date 3/18/22 2:25 PM
+ * @desc
+ */
+interface PlayerCallback {
+
+    fun onPrepare()
+
+    fun onError(what :Int, extra :Int) :Boolean
+
+    fun onRenderFirstFrame()
+
+    fun onCompleteListener()
+
+}

app/src/main/java/com/frank/ffmpeg/activity/VideoPreviewActivity.kt

@@ -1,7 +1,6 @@
 package com.frank.ffmpeg.activity
 
 import android.annotation.SuppressLint
-import android.media.MediaPlayer
 import android.os.Bundle
 import android.os.Handler
 import android.os.Message
@@ -11,12 +10,12 @@ import android.view.Surface
 import android.view.SurfaceHolder
 import android.view.SurfaceView
 import android.view.View
+import com.frank.androidmedia.controller.MediaPlayerController
+import com.frank.androidmedia.listener.PlayerCallback
 
 import com.frank.ffmpeg.R
 import com.frank.ffmpeg.view.VideoPreviewBar
 
-import java.io.IOException
-
 import com.frank.ffmpeg.handler.FFmpegHandler.MSG_TOAST
 
 /**
@@ -24,9 +23,9 @@ import com.frank.ffmpeg.handler.FFmpegHandler.MSG_TOAST
  * Created by frank on 2019/11/16.
  */
 
-class VideoPreviewActivity : BaseActivity(), VideoPreviewBar.PreviewBarCallback {
+class VideoPreviewActivity : BaseActivity(), VideoPreviewBar.PreviewBarCallback, PlayerCallback {
 
-    private var mediaPlayer: MediaPlayer? = null
+    private var playerController: MediaPlayerController? = null
     private var surfaceVideo: SurfaceView? = null
     private var videoPreviewBar: VideoPreviewBar? = null
 
@@ -35,8 +34,8 @@ class VideoPreviewActivity : BaseActivity(), VideoPreviewBar.PreviewBarCallback
         override fun handleMessage(msg: Message) {
             super.handleMessage(msg)
             if (msg.what == MSG_UPDATE) {
-                if (videoPreviewBar != null && mediaPlayer != null) {
-                    videoPreviewBar!!.updateProgress(mediaPlayer!!.currentPosition)
+                if (videoPreviewBar != null && playerController != null) {
+                    videoPreviewBar!!.updateProgress(playerController!!.currentPosition())
                 }
                 this.sendEmptyMessageDelayed(MSG_UPDATE, TIME_UPDATE.toLong())
             } else if (msg.what == MSG_TOAST) {
@@ -53,6 +52,7 @@ class VideoPreviewActivity : BaseActivity(), VideoPreviewBar.PreviewBarCallback
 
         initView()
         mHandler.sendEmptyMessageDelayed(MSG_TOAST, 500)
+        playerController = MediaPlayerController(this)
     }
 
     private fun initView() {
@@ -76,32 +76,11 @@ class VideoPreviewActivity : BaseActivity(), VideoPreviewBar.PreviewBarCallback
         })
     }
 
-    private fun setPrepareListener() {
-        if (mediaPlayer == null) {
-            return
-        }
-        mediaPlayer!!.setOnPreparedListener {
-            Log.i(TAG, "onPrepared...")
-            mediaPlayer!!.start()
-            mHandler.sendEmptyMessage(MSG_UPDATE)
-        }
-    }
-
     private fun doPlay(filePath: String, surface: Surface?) {
         if (surface == null || TextUtils.isEmpty(filePath)) {
             return
         }
-        releasePlayer()
-        try {
-            mediaPlayer = MediaPlayer()
-            setPrepareListener()
-            mediaPlayer!!.setDataSource(filePath)
-            mediaPlayer!!.setSurface(surface)
-            mediaPlayer!!.prepareAsync()
-        } catch (e: IOException) {
-            e.printStackTrace()
-        }
-
+        playerController?.initPlayer(filePath, surface)
     }
 
     override fun onViewClick(view: View) {
@@ -114,28 +93,39 @@ class VideoPreviewActivity : BaseActivity(), VideoPreviewBar.PreviewBarCallback
     }
 
     override fun onStopTracking(progress: Long) {
-        if (mediaPlayer != null) {
-            Log.i(TAG, "onStopTracking progress=$progress")
-            mediaPlayer!!.seekTo(progress.toInt())
-        }
-    }
-
-    private fun releasePlayer() {
-        if (mediaPlayer != null) {
-            mediaPlayer!!.stop()
-            mediaPlayer!!.release()
-            mediaPlayer = null
+        if (playerController != null) {
+            playerController!!.seekTo(progress.toInt())
         }
     }
 
     override fun onDestroy() {
         super.onDestroy()
-        releasePlayer()
+        playerController?.releasePlayer()
         if (videoPreviewBar != null) {
             videoPreviewBar!!.release()
         }
     }
 
+    /// player callback
+
+    override fun onPrepare() {
+        Log.i(TAG, "onPrepare...")
+        mHandler.sendEmptyMessage(MSG_UPDATE)
+    }
+
+    override fun onRenderFirstFrame() {
+        Log.i(TAG, "onRenderFirstFrame...")
+    }
+
+    override fun onError(what: Int, extra: Int): Boolean {
+        Log.e(TAG, "onError...")
+        return true
+    }
+
+    override fun onCompleteListener() {
+        Log.i(TAG, "onCompleteListener...")
+    }
+
     companion object {
 
         private val TAG = VideoPreviewActivity::class.java.simpleName