增加音频编码：pcm编码成wav、aac

增加音频编码：pcm编码成wav、aac

app/src/main/java/com/frank/ffmpeg/activity/AudioHandleActivity.java

@@ -67,6 +67,7 @@ public class AudioHandleActivity extends AppCompatActivity implements View.OnCli
         findViewById(R.id.btn_mix).setOnClickListener(this);
         findViewById(R.id.btn_play_audio).setOnClickListener(this);
         findViewById(R.id.btn_play_opensl).setOnClickListener(this);
+        findViewById(R.id.btn_audio_encode).setOnClickListener(this);
     }
 
     private void setVisible() {
@@ -76,6 +77,7 @@ public class AudioHandleActivity extends AppCompatActivity implements View.OnCli
         findViewById(R.id.btn_mix).setVisibility(View.VISIBLE);
         findViewById(R.id.btn_play_audio).setVisibility(View.VISIBLE);
         findViewById(R.id.btn_play_opensl).setVisibility(View.VISIBLE);
+        findViewById(R.id.btn_audio_encode).setVisibility(View.VISIBLE);
     }
 
     private void setGone() {
@@ -85,6 +87,7 @@ public class AudioHandleActivity extends AppCompatActivity implements View.OnCli
         findViewById(R.id.btn_mix).setVisibility(View.GONE);
         findViewById(R.id.btn_play_audio).setVisibility(View.GONE);
         findViewById(R.id.btn_play_opensl).setVisibility(View.GONE);
+        findViewById(R.id.btn_audio_encode).setVisibility(View.GONE);
     }
 
     @Override
@@ -109,6 +112,9 @@ public class AudioHandleActivity extends AppCompatActivity implements View.OnCli
             case R.id.btn_play_opensl:
                 handleType = 5;
                 break;
+            case R.id.btn_audio_encode:
+                handleType = 6;
+                break;
             default:
                 handleType = 0;
                 break;
@@ -155,6 +161,12 @@ public class AudioHandleActivity extends AppCompatActivity implements View.OnCli
                     }
                 }).start();
                 return;
+            case 6://音频编码
+                //可编码成WAV、AAC。如果需要编码成MP3、AMR，ffmpeg需要重新编译，把MP3、AMR库enable
+                String pcmFile = PATH + File.separator + "audio.pcm";
+                String wavFile = PATH + File.separator + "output.wav";
+                commandLine = FFmpegUtil.encodeAudio(pcmFile, wavFile);
+                break;
             default:
                 break;
         }

app/src/main/java/com/frank/ffmpeg/util/FFmpegUtil.java

@@ -211,4 +211,17 @@ public class FFmpegUtil {
         return combineVideo.split(" ");//以空格分割为字符串数组
     }
 
+    /**
+     * 音频编码
+     * @param srcFile 源文件pcm裸流
+     * @param targetFile 编码后目标文件
+     * @return 音频编码的命令行
+     */
+    public static  String[] encodeAudio(String srcFile, String targetFile){
+        String combineVideo = "ffmpeg -f s16le -ar 8000 -ac 1 -i %s %s";
+        combineVideo = String.format(combineVideo, srcFile, targetFile);
+        combineVideo = combineVideo.replace("#", "%");
+        return combineVideo.split(" ");
+    }
+
 }

app/src/main/res/layout/activity_audio_handle.xml

@@ -11,7 +11,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="@string/audio_transform"
-        android:layout_marginTop="120dp"
+        android:layout_marginTop="80dp"
         android:layout_centerHorizontal="true"/>
 
     <Button
@@ -66,4 +66,13 @@
         android:layout_marginTop="10dp"
         android:layout_centerHorizontal="true"/>
 
+    <Button
+        android:id="@+id/btn_audio_encode"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/audio_encode"
+        android:layout_below="@+id/btn_play_opensl"
+        android:layout_marginTop="10dp"
+        android:layout_centerHorizontal="true"/>
+
 </RelativeLayout>

app/src/main/res/values/strings.xml

@@ -6,6 +6,7 @@
     <string name="audio_mix">音频混合</string>
     <string name="audio_play">音频解码AudioTrack播放</string>
     <string name="audio_opensl">音频解码OpenSL播放</string>
+    <string name="audio_encode">音频编码</string>
 
     <string name="audio_handle">音频处理</string>
     <string name="media_handle">音视频处理</string>