Feature: add AudioProcessController, include AEC/AGC/NS

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

@@ -46,6 +46,16 @@ open class AudioEffectController(audioEffectCallback: AudioEffectCallback) {
         mAudioEffectCallback = audioEffectCallback
     }
 
+    /******************************************************************
+                           AudioEffect
+                                |
+          ______________________|___________________________
+         |           |          |            |              |
+     Equalizer  Virtualizer  BassBoost  PresetReverb  DynamicsProcessing
+
+     ******************************************************************/
+
+
     /**
      * Setup AudioEffect of Equalizer, which uses to adjust the gain of frequency.
      * There are key params of band、bandLevel、centerFrequency in Equalizer.

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

@@ -0,0 +1,100 @@
+package com.frank.androidmedia.controller
+
+import android.media.audiofx.AcousticEchoCanceler
+import android.media.audiofx.AudioEffect
+import android.media.audiofx.AutomaticGainControl
+import android.media.audiofx.NoiseSuppressor
+import android.util.Log
+import java.lang.Exception
+
+/**
+ *
+ * @author frank
+ * @date 2022/3/23
+ */
+open class AudioProcessController {
+
+    /*************************************************************
+                               AudioEffect
+                                    |
+                ____________________|___________________
+               |                    |                   |
+       AcousticEchoCanceler  AutomaticGainControl  NoiseSuppressor
+
+     **************************************************************/
+
+    companion object {
+        val TAG: String = AudioProcessController::class.java.simpleName
+    }
+
+    private var noiseSuppressor: NoiseSuppressor? = null
+    private var automaticGainControl: AutomaticGainControl? = null
+    private var acousticEchoCanceler: AcousticEchoCanceler? = null
+
+    fun initAEC(audioSessionId: Int): Boolean {
+        if (!AcousticEchoCanceler.isAvailable()) {
+            Log.e(TAG, "AEC not available...")
+            return false
+        }
+        try {
+            acousticEchoCanceler = AcousticEchoCanceler.create(audioSessionId)
+        } catch (e: Exception) {
+            Log.e(TAG, "init AcousticEchoCanceler error=$e")
+            return false
+        }
+        val result = acousticEchoCanceler?.setEnabled(true)
+        if (result != AudioEffect.SUCCESS) {
+            acousticEchoCanceler?.release()
+            acousticEchoCanceler = null
+            return false
+        }
+        return true
+    }
+
+    fun initAGC(audioSessionId: Int): Boolean {
+        if (!AutomaticGainControl.isAvailable()) {
+            Log.e(TAG, "AGC not available...")
+            return false
+        }
+        try {
+            automaticGainControl = AutomaticGainControl.create(audioSessionId)
+        } catch (e: Exception) {
+            Log.e(TAG, "init AutomaticGainControl error=$e")
+            return false
+        }
+        val result = automaticGainControl?.setEnabled(true)
+        if (result != AudioEffect.SUCCESS) {
+            automaticGainControl?.release()
+            automaticGainControl = null
+            return false
+        }
+        return true
+    }
+
+    fun initNS(audioSessionId: Int): Boolean {
+        if (!NoiseSuppressor.isAvailable()) {
+            Log.e(TAG, "NS not available...")
+            return false
+        }
+        try {
+            noiseSuppressor = NoiseSuppressor.create(audioSessionId)
+        } catch (e: Exception) {
+            Log.e(TAG, "init NoiseSuppressor error=$e")
+            return false
+        }
+        val result = noiseSuppressor?.setEnabled(true)
+        if (result != AudioEffect.SUCCESS) {
+            noiseSuppressor?.release()
+            noiseSuppressor = null
+            return false
+        }
+        return true
+    }
+
+    fun release() {
+        noiseSuppressor?.release()
+        acousticEchoCanceler?.release()
+        automaticGainControl?.release()
+    }
+
+}

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

@@ -27,6 +27,9 @@ open class AudioRecordController {
     private var mAudioRecord: AudioRecord? = null
     private var mRecordThread: RecordThread? = null
 
+    private val enableAudioProcessor = false
+    private var mAudioProcessController: AudioProcessController? = null
+
     private fun initAudioRecord() {
         val sampleRate    = 44100
         val audioFormat   = AudioFormat.ENCODING_PCM_16BIT
@@ -37,6 +40,16 @@ open class AudioRecordController {
                                     channelConfig,
                                     audioFormat,
                                     minBufferSize)
+
+        if (enableAudioProcessor) {
+            mAudioProcessController = AudioProcessController()
+            var result:Boolean? = mAudioProcessController?.initAEC(mAudioRecord?.audioSessionId!!)
+            Log.e(TAG, "init AEC result=$result")
+            result = mAudioProcessController?.initAGC(mAudioRecord?.audioSessionId!!)
+            Log.e(TAG, "init AGC result=$result")
+            result = mAudioProcessController?.initNS(mAudioRecord?.audioSessionId!!)
+            Log.e(TAG, "init NS result=$result")
+        }
     }
 
     private class RecordThread(recordPath: String, audioRecord: AudioRecord, bufferSize: Int) : Thread() {
@@ -133,5 +146,9 @@ open class AudioRecordController {
             mAudioRecord!!.release()
             mAudioRecord = null
         }
+        if (mAudioProcessController != null) {
+            mAudioProcessController!!.release()
+            mAudioProcessController = null
+        }
     }
 }