Have audio service clean up new receivers in crashing processes.

The new media button receiver with only a pending intent (no
component name) could be left hanging if the process that
registered it went away.  These semantically need to be tied
to the calling process's lifetime; we now clean them up when
the calling process goes away.

Also added some additional cleanup of media button receivers
when packages change (updated, cleared).

And on top of that, a new "media" command for doing media
things.  Currently lets you send media keys and monitor
remote display data.

Oh and finally added a new BaseCommand base class for
implementing these command line utilities.

Change-Id: Iba1d56f10bab1eec4a94a7bb1d1c2ae614c8bcf5

5 files changed, 431 insertions, 0 deletions

diff --git a/cmds/media/Android.mk b/cmds/media/Android.mk
new file mode 100644
index 0000000..b9451c5
--- /dev/null
+++ b/cmds/media/Android.mk
@@ -0,0 +1,15 @@
+# Copyright 2013 The Android Open Source Project
+#
+LOCAL_PATH:= $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := $(call all-subdir-java-files)
+LOCAL_MODULE := media_cmd
+include $(BUILD_JAVA_LIBRARY)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := media
+LOCAL_SRC_FILES := media
+LOCAL_MODULE_CLASS := EXECUTABLES
+LOCAL_MODULE_TAGS := optional
+include $(BUILD_PREBUILT)
diff --git a/cmds/media/MODULE_LICENSE_APACHE2 b/cmds/media/MODULE_LICENSE_APACHE2
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/cmds/media/MODULE_LICENSE_APACHE2
diff --git a/cmds/media/NOTICE b/cmds/media/NOTICE
new file mode 100644
index 0000000..c5b1efa
--- /dev/null
+++ b/cmds/media/NOTICE
@@ -0,0 +1,190 @@
+
+   Copyright (c) 2005-2008, 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.
+
+   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.
+
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
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+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      including but not limited to software source code, documentation
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+
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+      transformation or translation of a Source form, including but
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+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
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+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
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+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
diff --git a/cmds/media/media b/cmds/media/media
new file mode 100755
index 0000000..1194442
--- /dev/null
+++ b/cmds/media/media
@@ -0,0 +1,6 @@
+# Script to start "media_cmd" on the device, which has a very rudimentary
+# shell.
+#
+base=/system
+export CLASSPATH=$base/framework/media_cmd.jar
+exec app_process $base/bin com.android.commands.media.Media "$@"
diff --git a/cmds/media/src/com/android/commands/media/Media.java b/cmds/media/src/com/android/commands/media/Media.java
new file mode 100644
index 0000000..56af7d6
--- /dev/null
+++ b/cmds/media/src/com/android/commands/media/Media.java
@@ -0,0 +1,220 @@
+/*
+**
+** Copyright 2013, 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.commands.media;
+
+import android.app.PendingIntent;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.media.IAudioService;
+import android.media.IRemoteControlDisplay;
+import android.os.Bundle;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.os.SystemClock;
+import android.util.AndroidException;
+import android.view.InputDevice;
+import android.view.KeyCharacterMap;
+import android.view.KeyEvent;
+import com.android.internal.os.BaseCommand;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintStream;
+
+public class Media extends BaseCommand {
+
+    private IAudioService mAudioService;
+
+    /**
+     * Command-line entry point.
+     *
+     * @param args The command-line arguments
+     */
+    public static void main(String[] args) {
+        (new Media()).run(args);
+    }
+
+    public void onShowUsage(PrintStream out) {
+        out.println(
+                "usage: media [subcommand] [options]\n" +
+                "       media dispatch KEY\n" +
+                "       media remote-display\n" +
+                "\n" +
+                "media dispatch: dispatch a media key to the current media client.\n" +
+                "                KEY may be: play, pause, play-pause, mute, headsethook,\n" +
+                "                stop, next, previous, rewind, recordm fast-forword.\n" +
+                "media remote-display: monitor remote display updates.\n"
+        );
+    }
+
+    public void onRun() throws Exception {
+        mAudioService = IAudioService.Stub.asInterface(ServiceManager.checkService(
+                Context.AUDIO_SERVICE));
+        if (mAudioService == null) {
+            System.err.println(NO_SYSTEM_ERROR_CODE);
+            throw new AndroidException("Can't connect to audio service; is the system running?");
+        }
+
+        String op = nextArgRequired();
+
+        if (op.equals("dispatch")) {
+            runDispatch();
+        } else if (op.equals("remote-display")) {
+            runRemoteDisplay();
+        } else {
+            showError("Error: unknown command '" + op + "'");
+            return;
+        }
+    }
+
+    private void sendMediaKey(KeyEvent event) {
+        try {
+            mAudioService.dispatchMediaKeyEvent(event);
+        } catch (RemoteException e) {
+        }
+    }
+
+    private void runDispatch() throws Exception {
+        String cmd = nextArgRequired();
+        int keycode;
+        if ("play".equals(cmd)) {
+            keycode = KeyEvent.KEYCODE_MEDIA_PLAY;
+        } else if ("pause".equals(cmd)) {
+            keycode = KeyEvent.KEYCODE_MEDIA_PAUSE;
+        } else if ("play-pause".equals(cmd)) {
+            keycode = KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE;
+        } else if ("mute".equals(cmd)) {
+            keycode = KeyEvent.KEYCODE_MUTE;
+        } else if ("headsethook".equals(cmd)) {
+            keycode = KeyEvent.KEYCODE_HEADSETHOOK;
+        } else if ("stop".equals(cmd)) {
+            keycode = KeyEvent.KEYCODE_MEDIA_STOP;
+        } else if ("next".equals(cmd)) {
+            keycode = KeyEvent.KEYCODE_MEDIA_NEXT;
+        } else if ("previous".equals(cmd)) {
+            keycode = KeyEvent.KEYCODE_MEDIA_PREVIOUS;
+        } else if ("rewind".equals(cmd)) {
+            keycode = KeyEvent.KEYCODE_MEDIA_REWIND;
+        } else if ("record".equals(cmd)) {
+            keycode = KeyEvent.KEYCODE_MEDIA_RECORD;
+        } else if ("fast-forward".equals(cmd)) {
+            keycode = KeyEvent.KEYCODE_MEDIA_FAST_FORWARD;
+        } else {
+            showError("Error: unknown dispatch code '" + cmd + "'");
+            return;
+        }
+
+        final long now = SystemClock.uptimeMillis();
+        sendMediaKey(new KeyEvent(now, now, KeyEvent.ACTION_DOWN, keycode, 0, 0,
+                KeyCharacterMap.VIRTUAL_KEYBOARD, 0, 0, InputDevice.SOURCE_KEYBOARD));
+        sendMediaKey(new KeyEvent(now, now, KeyEvent.ACTION_UP, keycode, 0, 0,
+                KeyCharacterMap.VIRTUAL_KEYBOARD, 0, 0, InputDevice.SOURCE_KEYBOARD));
+    }
+
+    class RemoteDisplayMonitor extends IRemoteControlDisplay.Stub {
+        RemoteDisplayMonitor() {
+        }
+
+
+        @Override
+        public void setCurrentClientId(int clientGeneration, PendingIntent clientMediaIntent,
+                boolean clearing) {
+            System.out.println("New client: id=" + clientGeneration
+                    + " intent=" + clientMediaIntent + " clearing=" + clearing);
+        }
+
+        @Override
+        public void setPlaybackState(int generationId, int state, long stateChangeTimeMs,
+                long currentPosMs, float speed) {
+            System.out.println("New state: id=" + generationId + " state=" + state
+                    + " time=" + stateChangeTimeMs + " pos=" + currentPosMs + " speed=" + speed);
+        }
+
+        @Override
+        public void setTransportControlInfo(int generationId, int transportControlFlags,
+                int posCapabilities) {
+            System.out.println("New control info: id=" + generationId
+                    + " flags=0x" + Integer.toHexString(transportControlFlags)
+                    + " cap=0x" + Integer.toHexString(posCapabilities));
+        }
+
+        @Override
+        public void setMetadata(int generationId, Bundle metadata) {
+            System.out.println("New metadata: id=" + generationId
+                    + " data=" + metadata);
+        }
+
+        @Override
+        public void setArtwork(int generationId, Bitmap artwork) {
+            System.out.println("New artwork: id=" + generationId
+                    + " art=" + artwork);
+        }
+
+        @Override
+        public void setAllMetadata(int generationId, Bundle metadata, Bitmap artwork) {
+            System.out.println("New metadata+artwork: id=" + generationId
+                    + " data=" + metadata + " art=" + artwork);
+        }
+
+        void printUsageMessage() {
+            System.out.println("Monitoring remote control displays...  available commands:");
+            System.out.println("(q)uit: finish monitoring");
+        }
+
+        void run() throws RemoteException {
+            printUsageMessage();
+
+            mAudioService.registerRemoteControlDisplay(this, 0, 0);
+
+            try {
+                InputStreamReader converter = new InputStreamReader(System.in);
+                BufferedReader in = new BufferedReader(converter);
+                String line;
+
+                while ((line = in.readLine()) != null) {
+                    boolean addNewline = true;
+                    if (line.length() <= 0) {
+                        addNewline = false;
+                    } else if ("q".equals(line) || "quit".equals(line)) {
+                        break;
+                    } else {
+                        System.out.println("Invalid command: " + line);
+                    }
+
+                    synchronized (this) {
+                        if (addNewline) {
+                            System.out.println("");
+                        }
+                        printUsageMessage();
+                    }
+                }
+
+            } catch (IOException e) {
+                e.printStackTrace();
+            } finally {
+                mAudioService.unregisterRemoteControlDisplay(this);
+            }
+        }
+    }
+
+    private void runRemoteDisplay() throws Exception {
+        RemoteDisplayMonitor monitor = new RemoteDisplayMonitor();
+        monitor.run();
+    }
+}