commit 330b21d64ec7e06ebaf6ad74d1374f8ccb9eb43f
author Ranjith Kagathi Ananda <ranjith@codeaurora.org> Mon Aug 17 16:41:08 2015 -0700
committer Shuzhen Wang <shuzhenw@codeaurora.org> Wed Sep 09 13:04:34 2015 -0700
tree da73300509f8606ca92d1808ff4c55d51071b55c
parent 5ea144d2235971be9ffda5989e2a1b999cf04d37

gralloc: change the IMPLEMENTATION_DEFINED preview buffers format

Set the preview buffers format be the same as the video buffers
in order to improve camera power usage.

Change-Id: Iaf69dad9d15b0b6fdc4cfe538104f404008e84fb

libgralloc/gpu.cpp

diff --git a/libgralloc/gpu.cpp b/libgralloc/gpu.cpp
index 9788614..6945daf 100644
--- a/libgralloc/gpu.cpp
+++ b/libgralloc/gpu.cpp
@@ -287,9 +287,13 @@
             grallocFormat = HAL_PIXEL_FORMAT_NV21_ZSL; //NV21 ZSL
         else if(usage & GRALLOC_USAGE_HW_CAMERA_READ)
             grallocFormat = HAL_PIXEL_FORMAT_YCrCb_420_SP; //NV21
-        else if(usage & GRALLOC_USAGE_HW_CAMERA_WRITE)
-            grallocFormat = HAL_PIXEL_FORMAT_YCrCb_420_SP; //NV21
-        else if(usage & GRALLOC_USAGE_HW_COMPOSER)
+        else if(usage & GRALLOC_USAGE_HW_CAMERA_WRITE) {
+           if (format == HAL_PIXEL_FORMAT_YCbCr_420_888) {
+               grallocFormat = HAL_PIXEL_FORMAT_YCrCb_420_SP; //NV21
+           } else {
+               grallocFormat = HAL_PIXEL_FORMAT_YCbCr_420_SP_VENUS; //NV12 preview
+           }
+        } else if(usage & GRALLOC_USAGE_HW_COMPOSER)
             //XXX: If we still haven't set a format, default to RGBA8888
             grallocFormat = HAL_PIXEL_FORMAT_RGBA_8888;
     }