1 files changed, 86 insertions, 0 deletions
diff --git a/src/com/android/camera/PanoUtil.java b/src/com/android/camera/PanoUtil.java
new file mode 100644
index 000000000..e50eaccc8
--- /dev/null
+++ b/src/com/android/camera/PanoUtil.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.camera;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class PanoUtil {
+    public static String createName(String format, long dateTaken) {
+        Date date = new Date(dateTaken);
+        SimpleDateFormat dateFormat = new SimpleDateFormat(format);
+        return dateFormat.format(date);
+    }
+
+    // TODO: Add comments about the range of these two arguments.
+    public static double calculateDifferenceBetweenAngles(double firstAngle,
+            double secondAngle) {
+        double difference1 = (secondAngle - firstAngle) % 360;
+        if (difference1 < 0) {
+            difference1 += 360;
+        }
+
+        double difference2 = (firstAngle - secondAngle) % 360;
+        if (difference2 < 0) {
+            difference2 += 360;
+        }
+
+        return Math.min(difference1, difference2);
+    }
+
+    public static void decodeYUV420SPQuarterRes(int[] rgb, byte[] yuv420sp, int width, int height) {
+        final int frameSize = width * height;
+
+        for (int j = 0, ypd = 0; j < height; j += 4) {
+            int uvp = frameSize + (j >> 1) * width, u = 0, v = 0;
+            for (int i = 0; i < width; i += 4, ypd++) {
+                int y = (0xff & (yuv420sp[j * width + i])) - 16;
+                if (y < 0) {
+                    y = 0;
+                }
+                if ((i & 1) == 0) {
+                    v = (0xff & yuv420sp[uvp++]) - 128;
+                    u = (0xff & yuv420sp[uvp++]) - 128;
+                    uvp += 2;  // Skip the UV values for the 4 pixels skipped in between
+                }
+                int y1192 = 1192 * y;
+                int r = (y1192 + 1634 * v);
+                int g = (y1192 - 833 * v - 400 * u);
+                int b = (y1192 + 2066 * u);
+
+                if (r < 0) {
+                    r = 0;
+                } else if (r > 262143) {
+                    r = 262143;
+                }
+                if (g < 0) {
+                    g = 0;
+                } else if (g > 262143) {
+                    g = 262143;
+                }
+                if (b < 0) {
+                    b = 0;
+                } else if (b > 262143) {
+                    b = 262143;
+                }
+
+                rgb[ypd] = 0xff000000 | ((r << 6) & 0xff0000) | ((g >> 2) & 0xff00) |
+                        ((b >> 10) & 0xff);
+            }
+        }
+    }
+}