commit 4ee9b17323fadcf6c9ad6671a2d5adc8197409ec
author Mansoor Aftab <maftab@codeaurora.org> Mon Dec 01 15:53:10 2014 -0800
committer Zhijun He <zhijunhe@google.com> Tue Dec 02 10:21:52 2014 -0800
tree e8d101ce6ed907e0206ecc64ea80a5a55cfdd886
parent 99c01c014572cb9c2293601c0c717e57c228a2a3

Camera3: Define and use upper bound on SYNC latency

Per-frame control is not supported on front sensor,
but sync value of 4 frames is a conservative and safe
estimate for front camera & is within the upperbound.
Use this upperbound to help with faster burst captures.

Bug: 18468006
Change-Id: Icf2a52d985bc17198a36d9afb9717697970ea457

camera/QCamera2/HAL3/QCamera3HWI.cpp

diff --git a/camera/QCamera2/HAL3/QCamera3HWI.cpp b/camera/QCamera2/HAL3/QCamera3HWI.cpp
index 4f1962c..db14f0f 100644
--- a/camera/QCamera2/HAL3/QCamera3HWI.cpp
+++ b/camera/QCamera2/HAL3/QCamera3HWI.cpp
@@ -61,6 +61,7 @@
 #define EMPTY_PIPELINE_DELAY 2
 #define PARTIAL_RESULT_COUNT 2
 #define FRAME_SKIP_DELAY     0
+#define CAM_MAX_SYNC_LATENCY 4
 
 #define VIDEO_4K_WIDTH  3840
 #define VIDEO_4K_HEIGHT 2160
@@ -4617,7 +4618,7 @@
     staticInfo.update(ANDROID_SCALER_AVAILABLE_INPUT_OUTPUT_FORMATS_MAP,
                       io_format_map, 0);
 
-    int32_t max_latency = (facingBack)? ANDROID_SYNC_MAX_LATENCY_PER_FRAME_CONTROL:ANDROID_SYNC_MAX_LATENCY_UNKNOWN;
+    int32_t max_latency = (facingBack)? ANDROID_SYNC_MAX_LATENCY_PER_FRAME_CONTROL:CAM_MAX_SYNC_LATENCY;
     staticInfo.update(ANDROID_SYNC_MAX_LATENCY,
                       &max_latency,
                       1);