commit 6cdf6372dc626290335c17ded005275ffa24bf62
author Zhijun He <zhijunhe@google.com> Sat Jul 15 14:59:58 2017 -0700
committer Zhijun He <zhijunhe@google.com> Sat Jul 15 15:19:12 2017 -0700
tree 0ae98efa52dca47213cebff4475968010fbb0e64
parent 6f41150030715dced873cc9b730f577cdaee3e69

HAL3: reduce buffer counts

When EIS3 is enabled, further optimize below buffer counts:
* For 4K video buffer count 30-->18
* For other video buffer count: 30-->24

Also reduce the BLOB count from 10 to 3.

These reduced the peak pressure by up to 200--300MB.

Bug: 62331291
Change-Id: I95cf8fede3a73f50ba737d34bcc0e52260f0b794

msm8998/QCamera2/HAL3/QCamera3HWI.cpp

diff --git a/msm8998/QCamera2/HAL3/QCamera3HWI.cpp b/msm8998/QCamera2/HAL3/QCamera3HWI.cpp
index 548a631..1c2d84f 100644
--- a/msm8998/QCamera2/HAL3/QCamera3HWI.cpp
+++ b/msm8998/QCamera2/HAL3/QCamera3HWI.cpp
@@ -2619,8 +2619,12 @@
                         int bufferCount = MAX_INFLIGHT_REQUESTS;
                         if (mStreamConfigInfo.type[mStreamConfigInfo.num_streams] ==
                                 CAM_STREAM_TYPE_VIDEO) {
-                            if (m_bEis3PropertyEnabled /* hint for EIS 3 needed here */)
-                                bufferCount = MAX_VIDEO_BUFFERS;
+                            if (m_bEis3PropertyEnabled /* hint for EIS 3 needed here */) {
+                                // WAR: 4K video can only run <=30fps, reduce the buffer count.
+                                bufferCount = m_bIs4KVideo ?
+                                    MAX_30FPS_VIDEO_BUFFERS : MAX_VIDEO_BUFFERS;
+                            }
+
                         }
                         channel = new QCamera3RegularChannel(mCameraHandle->camera_handle,
                                 mChannelHandle, mCameraHandle->ops, captureResultCb,