commit 81c0dcf7306273289dae06b67767ee4dbf97b668
author Mansoor Aftab <maftab@codeaurora.org> Mon Dec 01 15:53:10 2014 -0800
committer Zhijun He <zhijunhe@google.com> Mon Dec 01 16:53:59 2014 -0800
tree ba705aade7453c3bcbb784d7d105dac7ff60f7a6
parent 17af05f63effdbe41175e9c70051634577dccde0

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 ceb33fd..4e99fc6 100644
--- a/camera/QCamera2/HAL3/QCamera3HWI.cpp
+++ b/camera/QCamera2/HAL3/QCamera3HWI.cpp
@@ -56,6 +56,7 @@
 #define DATA_PTR(MEM_OBJ,INDEX) MEM_OBJ->getPtr( INDEX )
 
 #define EMPTY_PIPELINE_DELAY 2
+#define CAM_MAX_SYNC_LATENCY 4
 
 cam_capability_t *gCamCapability[MM_CAMERA_MAX_NUM_SENSORS];
 const camera_metadata_t *gStaticMetadata[MM_CAMERA_MAX_NUM_SENSORS];
@@ -3862,7 +3863,7 @@
     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);