commit ba92d773d3a13ff9d564797d06b03b22c3219f55
author Shuzhen Wang <shuzhenwang@google.com> Mon Apr 11 11:47:24 2022 -0700
committer Shuzhen Wang <shuzhenwang@google.com> Wed Apr 27 09:04:12 2022 -0700
tree 3969f41e2631d7671da0531bd0fbaae959f835ed
parent 768f4c48025f051d780589de60eadcf91573a3b8

Camera: re-space camera output for hardware texture target

2 issues with overriding presentation timestamp for SurfaceTexture:
- We cannot override timestamp for SurfaceTexture, because the timestamp
  may be used for AV sync.
- TextureView always picks the latest buffer and display it right away
  without using the presentation timestamp.

Due to these reasons, the cameraservice re-spaces queuing of the buffer
based on capture time intervals rather than overriding timestamps.
The buffer timestamp is left untouched.

Test: Run Instagram, Snapchat, and Tiktok and observe improved preview
Test: Camera CTS
Bug: 195025014
Change-Id: I28b23d9f2b39b6a289b6d9f87968e4bc667870a4

services/camera/libcameraservice/Android.bp

diff --git a/services/camera/libcameraservice/Android.bp b/services/camera/libcameraservice/Android.bp
index 1e2dccb..47594c3 100644
--- a/services/camera/libcameraservice/Android.bp
+++ b/services/camera/libcameraservice/Android.bp
@@ -81,6 +81,7 @@
         "device3/Camera3OutputUtils.cpp",
         "device3/Camera3DeviceInjectionMethods.cpp",
         "device3/UHRCropAndMeteringRegionMapper.cpp",
+        "device3/PreviewFrameSpacer.cpp",
         "device3/hidl/HidlCamera3Device.cpp",
         "device3/hidl/HidlCamera3OfflineSession.cpp",
         "device3/hidl/HidlCamera3OutputUtils.cpp",