Use debug.Log instead of android.util.Log.

see http://ag/438423, merge conflicts solved.

1. Change to use com.android.camera.debug.Log instead of android.util.Log.
2. Add DebugCameraProxy to support more detailed debug info.
3. Add CameraErrorCallback in CameraManager.
4. Support posting to a specific handler for CameraErrorCallback.
5. Trim down some TAGs to match the framework tag length limit.
6. Remove some unused codes in CameraSettings.

bug:13324870

Change-Id: I8c20a8a0d11cfd50b6e199b03cbc88d3c4ad2ceb

Conflicts:
	src/com/android/camera/data/LocalMediaData.java
	src/com/android/camera/data/RotationTask.java
	src/com/android/camera/widget/FilmstripView.java

1 files changed, 205 insertions, 0 deletions

diff --git a/camera2/portability/src/com/android/ex/camera2/portability/debug/Log.java b/camera2/portability/src/com/android/ex/camera2/portability/debug/Log.java
new file mode 100644
index 0000000..a9e6d91
--- /dev/null
+++ b/camera2/portability/src/com/android/ex/camera2/portability/debug/Log.java
@@ -0,0 +1,205 @@
+/*
+ * Copyright (C) 2014 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.ex.camera2.portability.debug;
+
+public class Log {
+    public static final String CAMERA_LOGTAG_PREFIX = "CAM2PORT_";
+    private static final Log.Tag TAG = new Log.Tag("Log");
+
+    /**
+     * This class restricts the length of the log tag to be less than the
+     * framework limit and also prepends the common tag prefix defined by
+     * {@code CAMERA_LOGTAG_PREFIX}.
+     */
+    public static final class Tag {
+
+        // The length limit from Android framework is 23.
+        private static final int MAX_TAG_LEN = 23 - CAMERA_LOGTAG_PREFIX.length();
+
+        final String mValue;
+
+        public Tag(String tag) {
+            final int lenDiff = tag.length() - MAX_TAG_LEN;
+            if (lenDiff > 0) {
+                w(TAG, "Tag " + tag + " is " + lenDiff + " chars longer than limit.");
+            }
+            mValue = CAMERA_LOGTAG_PREFIX + (lenDiff > 0 ? tag.substring(0, MAX_TAG_LEN) : tag);
+        }
+
+        @Override
+        public String toString() {
+            return mValue;
+        }
+    }
+
+    private interface Logger {
+        void log(Tag tag, String msg);
+        void log(Tag tag, String msg, Throwable tr);
+    }
+
+    private static final Logger SILENT_LOGGER = new Logger() {
+        @Override
+        public void log(Tag tag, String msg) {
+            // Do nothing.
+        }
+
+        @Override
+        public void log(Tag tag, String msg, Throwable tr) {
+            // Do nothing.
+        }
+    };
+
+    private static final Logger LOGGER_D = (!CurrentConfig.get().logDebug() ? SILENT_LOGGER : new Logger() {
+        final int level = android.util.Log.DEBUG;
+
+        @Override
+        public void log(Tag tag, String msg) {
+            if (isLoggable(tag, level)) {
+                android.util.Log.d(tag.toString(), msg);
+            }
+        }
+
+        @Override
+        public void log(Tag tag, String msg, Throwable tr) {
+            if (isLoggable(tag, level)) {
+                android.util.Log.d(tag.toString(), msg, tr);
+            }
+        }
+    });
+
+    private static final Logger LOGGER_E = (!CurrentConfig.get().logError() ? SILENT_LOGGER : new Logger() {
+        final int level = android.util.Log.ERROR;
+
+        @Override
+        public void log(Tag tag, String msg) {
+            if (isLoggable(tag, level)) {
+                android.util.Log.e(tag.toString(), msg);
+            }
+        }
+
+        @Override
+        public void log(Tag tag, String msg, Throwable tr) {
+            if (isLoggable(tag, level)) {
+                android.util.Log.e(tag.toString(), msg, tr);
+            }
+        }
+    });
+
+    private static final Logger LOGGER_I = (!CurrentConfig.get().logInfo() ? SILENT_LOGGER : new Logger() {
+        final int level = android.util.Log.INFO;
+
+        @Override
+        public void log(Tag tag, String msg) {
+            if (isLoggable(tag, level)) {
+                android.util.Log.i(tag.toString(), msg);
+            }
+        }
+
+        @Override
+        public void log(Tag tag, String msg, Throwable tr) {
+            if (isLoggable(tag, level)) {
+                android.util.Log.i(tag.toString(), msg, tr);
+            }
+        }
+    });
+
+    private static final Logger LOGGER_V = (!CurrentConfig.get().logVerbose() ? SILENT_LOGGER : new Logger() {
+        final int level = android.util.Log.VERBOSE;
+
+        @Override
+        public void log(Tag tag, String msg) {
+            if (isLoggable(tag, level)) {
+                android.util.Log.v(tag.toString(), msg);
+            }
+        }
+
+        @Override
+        public void log(Tag tag, String msg, Throwable tr) {
+            if (isLoggable(tag, level)) {
+                android.util.Log.v(tag.toString(), msg, tr);
+            }
+        }
+    });
+
+    private static final Logger LOGGER_W = (!CurrentConfig.get().logWarn() ? SILENT_LOGGER : new Logger() {
+        final int level = android.util.Log.WARN;
+
+        @Override
+        public void log(Tag tag, String msg) {
+            if (isLoggable(tag, level)) {
+                android.util.Log.w(tag.toString(), msg);
+            }
+        }
+
+        @Override
+        public void log(Tag tag, String msg, Throwable tr) {
+            if (isLoggable(tag, level)) {
+                android.util.Log.w(tag.toString(), msg, tr);
+            }
+        }
+    });
+
+
+    public static void d(Tag tag, String msg) {
+        LOGGER_D.log(tag, msg);
+    }
+
+    public static void d(Tag tag, String msg, Throwable tr) {
+        LOGGER_D.log(tag, msg, tr);
+    }
+
+    public static void e(Tag tag, String msg) {
+        LOGGER_E.log(tag, msg);
+    }
+
+    public static void e(Tag tag, String msg, Throwable tr) {
+        LOGGER_E.log(tag, msg, tr);
+    }
+
+    public static void i(Tag tag, String msg) {
+        LOGGER_I.log(tag, msg);
+    }
+
+    public static void i(Tag tag, String msg, Throwable tr) {
+        LOGGER_I.log(tag, msg, tr);
+    }
+
+    public static void v(Tag tag, String msg) {
+        LOGGER_V.log(tag, msg);
+    }
+
+    public static void v(Tag tag, String msg, Throwable tr) {
+        LOGGER_V.log(tag, msg, tr);
+    }
+
+    public static void w(Tag tag, String msg) {
+        LOGGER_W.log(tag, msg);
+    }
+
+    public static void w(Tag tag, String msg, Throwable tr) {
+        LOGGER_W.log(tag, msg, tr);
+    }
+
+    private static boolean isLoggable(Tag tag, int level) {
+        try {
+            return android.util.Log.isLoggable(tag.toString(), level);
+        } catch (IllegalArgumentException ex) {
+            e(TAG, "Tag too long:" + tag);
+            return false;
+        }
+    }
+}