SnapdragonCamera: Longshot with Burst Functionality.

This is a new Longshot feature where in the snapshot frames
captured at ISP is @ 3fps and output JPEG encoded rate is @ 1.2 fps.

This can be enabled by setting following setprop with
the maximum number of snapshots.
adb shell setprop persist.camera.longshot.max <max_number>
e.g.:adb shell setprop persist.camera.longshot.max 10
If the number is -1, then the existing Longshot will be used.

Main changes:
1) The number of Snapshot/Preview/Metadata buffers are increased to
make sure no frames will be dropped @ ISP and to maintain burst fps.
e.g.: For max number of 10 snapshots, Snapshot buffers are increased to 9
from existing 6.
This buffer numbers are derived considering snapshot YUV frames @ 3 fps
and JPEG encoding @ 1.2 fps.
2) Shutter will be played after receiving YUV frame instead of reprocess frame.
3) New Longshot stop command is sent after receiving all the required YUV
callbacks or releasing the shutter before reaching Max number.
4) Existing Longshot off command is sent after receiving all JPEG CB.s for the issued
TakePictures() and also shutter button will be disabled until all the JPEG
callbacks are received.

Change-Id: Id0c21aeb67245530768bf3ab859d39dea7e2bc40

1 files changed, 5 insertions, 0 deletions

diff --git a/src/com/android/camera/CameraManager.java b/src/com/android/camera/CameraManager.java
index 7f59975df..d379a2fe0 100644
--- a/src/com/android/camera/CameraManager.java
+++ b/src/com/android/camera/CameraManager.java
@@ -385,5 +385,10 @@ public interface CameraManager {
          *                 {@code false} to disable it.
         */
         public void setLongshot(boolean enable);
+        /**
+         * Stop longshot.
+         *
+        */
+        public void stopLongshot();
     }
 }