From 153934967692f8a033323bb6087c7b0df7796e35 Mon Sep 17 00:00:00 2001
From: likaid <likaid@codeaurora.org>
Date: Tue, 28 Jul 2015 14:04:18 +0800
Subject: SnapdragonCamera: Reduce the latency for panorama preview starting

In panorama mode preview, the stopPreview and startPreview were
called three times after onResume from lockscreen, that caused the
preview showing delay.

Reduce the unnecessary stopPreview to improve the preview performance.

CRs-Fixed: 876035
Change-Id: Ice5b0c305edb773867fd4803c190c98f5518ecb2
---
 src/com/android/camera/WideAnglePanoramaModule.java | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

(limited to 'src')

diff --git a/src/com/android/camera/WideAnglePanoramaModule.java b/src/com/android/camera/WideAnglePanoramaModule.java
index cd8f6fe65..26a8cb972 100644
--- a/src/com/android/camera/WideAnglePanoramaModule.java
+++ b/src/com/android/camera/WideAnglePanoramaModule.java
@@ -495,9 +495,6 @@ public class WideAnglePanoramaModule
             mMosaicPreviewRenderer = renderer;
             mCameraTexture = mMosaicPreviewRenderer.getInputSurfaceTexture();
 
-            if (!mPaused && !mThreadRunning && mWaitProcessorTask == null) {
-                mMainHandler.sendEmptyMessage(MSG_RESET_TO_PREVIEW);
-            }
             mRendererLock.notifyAll();
         }
         mMosaicPreviewConfigured = true;
@@ -515,9 +512,14 @@ public class WideAnglePanoramaModule
         if (mCaptureState == CAPTURE_STATE_MOSAIC){
             capturePending = true;
         }
-        mPreviewUIWidth = r - l;
-        mPreviewUIHeight = b - t;
-        configMosaicPreview();
+        int width = r -l;
+        int height = b - t;
+        if (mPreviewUIWidth != width || mPreviewUIHeight != height
+                || mCameraState != PREVIEW_ACTIVE) {
+            mPreviewUIWidth = r - l;
+            mPreviewUIHeight = b - t;
+            configMosaicPreview();
+        }
         if (capturePending == true){
             mMainHandler.post(new Runnable() {
                 @Override
-- 
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