Decouple encoding and camera

Signed-off-by: Leo Ma <begeekmyfriend@gmail.com>

library/src/main/java/net/ossrs/yasea/SrsCameraView.java

@@ -88,11 +88,11 @@ public class SrsCameraView extends SurfaceView implements SurfaceHolder.Callback
         return new int[] { mPreviewWidth, mPreviewHeight };
     }
 
-    private void enableEncoding() {
+    public void enableEncoding() {
         mIsEncoding = true;
     }
 
-    private void disableEncoding() {
+    public void disableEncoding() {
         mIsEncoding = false;
     }
 
@@ -104,8 +104,6 @@ public class SrsCameraView extends SurfaceView implements SurfaceHolder.Callback
             }
         }
 
-        enableEncoding();
-
         Camera.Parameters params = mCamera.getParameters();
         int[] range = adaptFpsRange(SrsEncoder.VFPS, params.getSupportedPreviewFpsRange());
         params.setPreviewFpsRange(range[0], range[1]);

library/src/main/java/net/ossrs/yasea/SrsPublisher.java

@@ -138,6 +138,8 @@ public class SrsPublisher {
             return;
         }
 
+        mCameraView.enableEncoding();
+
         startAudio();
     }
 
@@ -243,16 +245,14 @@ public class SrsPublisher {
     }
 
     public void switchCameraFace(int id) {
-        if (mEncoder.isEnabled()) {
-            mCameraView.stopCamera();
-            mCameraView.setCameraId(id);
-            if (id == 0) {
-                mEncoder.setCameraBackFace();
-            } else {
-                mEncoder.setCameraFrontFace();
-            }
-            mCameraView.startCamera();
+        mCameraView.stopCamera();
+        mCameraView.setCameraId(id);
+        if (id == 0) {
+            mEncoder.setCameraBackFace();
+        } else {
+            mEncoder.setCameraFrontFace();
         }
+        mCameraView.startCamera();
     }
 
     public void setRtmpHandler(RtmpHandler handler) {