1 files changed, 94 insertions, 0 deletions
diff --git a/src/com/android/camera/util/CameraUtil.java b/src/com/android/camera/util/CameraUtil.java
index 838f8d950..cb414bac0 100644
--- a/src/com/android/camera/util/CameraUtil.java
+++ b/src/com/android/camera/util/CameraUtil.java
@@ -71,9 +71,22 @@ import java.text.SimpleDateFormat;
 import java.util.Comparator;
 import java.util.Date;
 import java.util.List;
+import java.util.ArrayList;
 import java.util.Locale;
+import android.util.Range;
 import java.util.StringTokenizer;
 
+import com.android.camera.SettingsManager;
+import android.hardware.camera2.CameraAccessException;
+import android.hardware.camera2.CameraCaptureSession;
+import android.hardware.camera2.params.StreamConfigurationMap;
+import android.hardware.camera2.CaptureRequest;
+import android.hardware.camera2.impl.CameraMetadataNative;
+import android.hardware.camera2.utils.SurfaceUtils;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Iterator;
+
 /**
  * Collection of utility functions used in this package.
  */
@@ -1275,4 +1288,85 @@ public class CameraUtil {
                     (long) rhs.getWidth() * rhs.getHeight());
         }
     }
+
+    public static List<CaptureRequest> createHighSpeedRequestList(CaptureRequest request
+            ,int cameraId) throws CameraAccessException {
+        if (request == null) {
+            throw new IllegalArgumentException("Input capture request must not be null");
+        }
+        Collection<Surface> outputSurfaces = request.getTargets();
+        Range<Integer> fpsRange = request.get(CaptureRequest.CONTROL_AE_TARGET_FPS_RANGE);
+
+        StreamConfigurationMap config =
+                SettingsManager.getInstance().getStreamConfigurationMap(cameraId);
+        SurfaceUtils.checkConstrainedHighSpeedSurfaces(outputSurfaces, fpsRange, config);
+
+        // Request list size: to limit the preview to 30fps, need use maxFps/30; to maximize
+        // the preview frame rate, should use maxBatch size for that high speed stream
+        // configuration. We choose the former for now.
+        int requestListSize = fpsRange.getUpper() / 30;
+        List<CaptureRequest> requestList = new ArrayList<CaptureRequest>();
+
+        // Prepare the Request builders: need carry over the request controls.
+        // First, create a request builder that will only include preview or recording target.
+        CameraMetadataNative requestMetadata = new CameraMetadataNative(request.getNativeCopy());
+        // Note that after this step, the requestMetadata is mutated (swapped) and can not be used
+        // for next request builder creation.
+        CaptureRequest.Builder singleTargetRequestBuilder = new CaptureRequest.Builder(
+                requestMetadata, /*reprocess*/false, CameraCaptureSession.SESSION_ID_NONE);
+        singleTargetRequestBuilder.setTag(cameraId);
+
+        // Overwrite the capture intent to make sure a good value is set.
+        Iterator<Surface> iterator = outputSurfaces.iterator();
+        Surface firstSurface = iterator.next();
+        Surface secondSurface = null;
+        if (outputSurfaces.size() == 1 && SurfaceUtils.isSurfaceForHwVideoEncoder(firstSurface)) {
+            singleTargetRequestBuilder.set(CaptureRequest.CONTROL_CAPTURE_INTENT,
+                    CaptureRequest.CONTROL_CAPTURE_INTENT_PREVIEW);
+        } else {
+            // Video only, or preview + video
+            singleTargetRequestBuilder.set(CaptureRequest.CONTROL_CAPTURE_INTENT,
+                    CaptureRequest.CONTROL_CAPTURE_INTENT_VIDEO_RECORD);
+        }
+        singleTargetRequestBuilder.setPartOfCHSRequestList(/*partOfCHSList*/true);
+
+        // Second, Create a request builder that will include both preview and recording targets.
+        CaptureRequest.Builder doubleTargetRequestBuilder = null;
+        if (outputSurfaces.size() == 2) {
+            // Have to create a new copy, the original one was mutated after a new
+            // CaptureRequest.Builder creation.
+            requestMetadata = new CameraMetadataNative(request.getNativeCopy());
+            doubleTargetRequestBuilder = new CaptureRequest.Builder(
+                    requestMetadata, /*reprocess*/false, CameraCaptureSession.SESSION_ID_NONE);
+            doubleTargetRequestBuilder.setTag(cameraId);
+            doubleTargetRequestBuilder.set(CaptureRequest.CONTROL_CAPTURE_INTENT,
+                    CaptureRequest.CONTROL_CAPTURE_INTENT_VIDEO_RECORD);
+            doubleTargetRequestBuilder.addTarget(firstSurface);
+            secondSurface = iterator.next();
+            doubleTargetRequestBuilder.addTarget(secondSurface);
+            doubleTargetRequestBuilder.setPartOfCHSRequestList(/*partOfCHSList*/true);
+            // Make sure singleTargetRequestBuilder contains only recording surface for
+            // preview + recording case.
+            Surface recordingSurface = firstSurface;
+            if (!SurfaceUtils.isSurfaceForHwVideoEncoder(recordingSurface)) {
+                recordingSurface = secondSurface;
+            }
+            singleTargetRequestBuilder.addTarget(recordingSurface);
+        } else {
+            // Single output case: either recording or preview.
+            singleTargetRequestBuilder.addTarget(firstSurface);
+        }
+
+        // Generate the final request list.
+        for (int i = 0; i < requestListSize; i++) {
+            if (i == 0 && doubleTargetRequestBuilder != null) {
+                // First request should be recording + preview request
+                requestList.add(doubleTargetRequestBuilder.build());
+            } else {
+                requestList.add(singleTargetRequestBuilder.build());
+            }
+        }
+
+        return Collections.unmodifiableList(requestList);
+    }
 }