[Bug Fix] fix camera preview size setting problem (#638)

* [Bug Fix] fix android app detail page errors

* [Android] fix realtime camera mode and shutter

* [Bug Fix] fix AllocateSegmentationResultFromJava error

* [Bug Fix] fix camera preview size setting problem

* [Model] use uint8 buffer instead of fp32 in ppseg postprocess

* [Model] revert changes in ppseg

* [Model] revert postprocess changes in ppseg

java/android/app/src/main/AndroidManifest.xml

@@ -15,14 +15,14 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".facedet.FaceDetMainActivity">
+        <activity android:name=".segmentation.SegmentationMainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
         <activity
-            android:name=".facedet.FaceDetSettingsActivity"
+            android:name=".segmentation.SegmentationSettingsActivity"
             android:label="Settings">
         </activity>
     </application>

java/android/app/src/main/java/com/baidu/paddle/fastdeploy/app/examples/facedet/FaceDetMainActivity.java

@@ -320,8 +320,13 @@ public class FaceDetMainActivity extends Activity implements View.OnClickListene
 
     public void initView() {
         TYPE = REALTIME_DETECT;
-        CameraSurfaceView.EXPECTED_PREVIEW_WIDTH = 720;
-        CameraSurfaceView.EXPECTED_PREVIEW_HEIGHT = 360;
+        // (1) EXPECTED_PREVIEW_WIDTH should mean 'height' and EXPECTED_PREVIEW_HEIGHT
+        // should mean 'width' if the camera display orientation is 90 | 270 degree
+        // (Hold the phone upright to record video)
+        // (2) Smaller resolution is more suitable for lite face detection
+        // on mobile phone. So, we set this preview size (480,480) here.
+        CameraSurfaceView.EXPECTED_PREVIEW_WIDTH = 480;
+        CameraSurfaceView.EXPECTED_PREVIEW_HEIGHT = 480;
         svPreview = (CameraSurfaceView) findViewById(R.id.sv_preview);
         svPreview.setOnTextureChangedListener(this);
         svPreview.switchCamera(); // Front camera for HumanSeg

java/android/app/src/main/java/com/baidu/paddle/fastdeploy/app/examples/segmentation/SegmentationMainActivity.java

@@ -310,8 +310,13 @@ public class SegmentationMainActivity extends Activity implements View.OnClickLi
 
     public void initView() {
         TYPE = REALTIME_DETECT;
-        CameraSurfaceView.EXPECTED_PREVIEW_WIDTH = 720;
-        CameraSurfaceView.EXPECTED_PREVIEW_HEIGHT = 360;
+        // (1) EXPECTED_PREVIEW_WIDTH should mean 'height' and EXPECTED_PREVIEW_HEIGHT
+        // should mean 'width' if the camera display orientation is 90 | 270 degree
+        // (Hold the phone upright to record video)
+        // (2) Smaller resolution is more suitable for Lite Portrait HumanSeg.
+        // So, we set this preview size (480,480) here.
+        CameraSurfaceView.EXPECTED_PREVIEW_WIDTH = 480;
+        CameraSurfaceView.EXPECTED_PREVIEW_HEIGHT = 480;
         svPreview = (CameraSurfaceView) findViewById(R.id.sv_preview);
         svPreview.setOnTextureChangedListener(this);
         svPreview.switchCamera(); // Front camera for HumanSeg

java/android/app/src/main/java/com/baidu/paddle/fastdeploy/app/ui/Utils.java

@@ -126,7 +126,7 @@ public class Utils {
     }
 
     public static Camera.Size getOptimalPreviewSize(List<Camera.Size> sizes, int w, int h) {
-        final double ASPECT_TOLERANCE = 0.1;
+        final double ASPECT_TOLERANCE = 0.3;
         double targetRatio = (double) w / h;
         if (sizes == null) return null;
 

java/android/app/src/main/java/com/baidu/paddle/fastdeploy/app/ui/view/CameraSurfaceView.java

@@ -30,8 +30,8 @@ public class CameraSurfaceView extends GLSurfaceView implements Renderer,
         SurfaceTexture.OnFrameAvailableListener {
     private static final String TAG = CameraSurfaceView.class.getSimpleName();
 
-    public static int EXPECTED_PREVIEW_WIDTH = 1280;
-    public static int EXPECTED_PREVIEW_HEIGHT = 720;
+    public static int EXPECTED_PREVIEW_WIDTH = 1280;  // 1920
+    public static int EXPECTED_PREVIEW_HEIGHT = 720;  // 960
 
     protected int numberOfCameras;
     protected int selectedCameraId;
@@ -99,6 +99,16 @@ public class CameraSurfaceView extends GLSurfaceView implements Renderer,
     private int vcTex2Screen;
     private int tcTex2Screen;
 
+    public void setBitmapReleaseMode(boolean mode) {
+        synchronized (this) {
+            bitmapReleaseMode = mode;
+        }
+    }
+
+    public Bitmap getBitmap() {
+        return ARGB8888ImageBitmap; // may null or recycled.
+    }
+
     public interface OnTextureChangedListener {
         boolean onTextureChanged(Bitmap ARGB8888ImageBitmap);
     }
@@ -236,16 +246,6 @@ public class CameraSurfaceView extends GLSurfaceView implements Renderer,
         GLES20.glFlush();
     }
 
-    public void setBitmapReleaseMode(boolean mode) {
-        synchronized (this) {
-            bitmapReleaseMode = mode;
-        }
-    }
-
-    public Bitmap getBitmap() {
-        return ARGB8888ImageBitmap; // may null or recycled.
-    }
-
     private float[] transformTextureCoordinates(float[] coords, float[] matrix) {
         float[] result = new float[coords.length];
         float[] vt = new float[4];
@@ -287,20 +287,28 @@ public class CameraSurfaceView extends GLSurfaceView implements Renderer,
     public void openCamera() {
         if (disableCamera) return;
         camera = Camera.open(selectedCameraId);
-        List<Size> supportedPreviewSizes = camera.getParameters().getSupportedPreviewSizes();
-        Size previewSize = Utils.getOptimalPreviewSize(supportedPreviewSizes, EXPECTED_PREVIEW_WIDTH,
-                EXPECTED_PREVIEW_HEIGHT);
         Camera.Parameters parameters = camera.getParameters();
-        parameters.setPreviewSize(previewSize.width, previewSize.height);
-        if (parameters.getSupportedFocusModes().contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) {
-            parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
-        }
-        camera.setParameters(parameters);
         int degree = Utils.getCameraDisplayOrientation(context, selectedCameraId);
         camera.setDisplayOrientation(degree);
         boolean rotate = degree == 90 || degree == 270;
-        textureWidth = rotate ? previewSize.height : previewSize.width;
-        textureHeight = rotate ? previewSize.width : previewSize.height;
+        int adjusted_width = rotate ? EXPECTED_PREVIEW_HEIGHT : EXPECTED_PREVIEW_WIDTH;
+        int adjusted_height = rotate ? EXPECTED_PREVIEW_WIDTH : EXPECTED_PREVIEW_HEIGHT;
+
+        List<Size> supportedPreviewSizes = camera.getParameters().getSupportedPreviewSizes();
+
+        Size previewSize = Utils.getOptimalPreviewSize(
+                supportedPreviewSizes, adjusted_width, adjusted_height);
+
+        textureWidth = previewSize.width;
+        textureHeight = previewSize.height;
+
+        parameters.setPreviewSize(previewSize.width, previewSize.height);
+        camera.setParameters(parameters);
+
+        if (parameters.getSupportedFocusModes().contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) {
+            parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
+        }
+
         // Destroy FBO and draw textures
         GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
         GLES20.glDeleteFramebuffers(1, fbo, 0);