Add rickroll Dialer option. Add rick.webm in assets

gistfile1.txt

From f07ca2a26dcb0cc797dcc6fc0d2d4f16b89c481e Mon Sep 17 00:00:00 2001
From: Pierre-Hugues Husson <phh@phh.me>
Date: Mon, 14 Mar 2022 09:09:28 -0400
Subject: [PATCH] Add a rickroll button in heads-up notification to rickroll
 caller

Change-Id: Ibe72535fb3e93f69a531723dc96ede05663ee251
---
 assets/rick.webm                              | Bin 0 -> 1232413 bytes
 .../NotificationBroadcastReceiver.java        | 145 ++++++++++++++++++
 .../android/incallui/StatusBarNotifier.java   |  32 ++++
 .../com/android/incallui/call/DialerCall.java |   7 +
 4 files changed, 184 insertions(+)
 create mode 100644 assets/rick.webm

diff --git a/java/com/android/incallui/NotificationBroadcastReceiver.java b/java/com/android/incallui/NotificationBroadcastReceiver.java
index 241d8ed48..6573e32ec 100644
--- a/java/com/android/incallui/NotificationBroadcastReceiver.java
+++ b/java/com/android/incallui/NotificationBroadcastReceiver.java
@@ -36,6 +36,24 @@ import com.google.common.util.concurrent.FutureCallback;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;
 
+import com.android.incallui.call.state.DialerCallState;
+
+import android.util.Log;
+import android.media.AudioAttributes;
+import android.media.AudioDeviceInfo;
+import android.media.AudioFormat;
+import android.media.AudioManager;
+import android.media.AudioTrack;
+import android.media.MediaExtractor;
+import android.media.MediaFormat;
+import android.media.MediaCodec;
+
+import android.content.res.AssetFileDescriptor;
+
+import java.nio.ByteBuffer;
+
+import java.lang.Thread;
+
 /**
  * Accepts broadcast Intents which will be prepared by {@link StatusBarNotifier} and thus sent from
  * the notification manager. This should be visible from outside, but shouldn't be exported.
@@ -50,6 +68,9 @@ public class NotificationBroadcastReceiver extends BroadcastReceiver {
   public static final String ACTION_DECLINE_INCOMING_CALL =
       "com.android.incallui.ACTION_DECLINE_INCOMING_CALL";
 
+  public static final String ACTION_RICKROLL_INCOMING_CALL =
+      "com.android.incallui.ACTION_RICKROLL_INCOMING_CALL";
+
   public static final String ACTION_HANG_UP_ONGOING_CALL =
       "com.android.incallui.ACTION_HANG_UP_ONGOING_CALL";
   public static final String ACTION_ANSWER_VIDEO_INCOMING_CALL =
@@ -90,6 +111,9 @@ public class NotificationBroadcastReceiver extends BroadcastReceiver {
       Logger.get(context)
           .logImpression(DialerImpression.Type.REJECT_INCOMING_CALL_FROM_NOTIFICATION);
       declineIncomingCall();
+    } else if (action.equals(ACTION_RICKROLL_INCOMING_CALL)) {
+      rickroll(context);
+
     } else if (action.equals(ACTION_HANG_UP_ONGOING_CALL)) {
       hangUpOngoingCall();
     } else if (action.equals(ACTION_ACCEPT_VIDEO_UPGRADE_REQUEST)) {
@@ -220,4 +244,125 @@ public class NotificationBroadcastReceiver extends BroadcastReceiver {
       }
     }
   }
+  private void rickroll(Context context) {
+      CallList callList = InCallPresenter.getInstance().getCallList();
+      DialerCall call = callList.getIncomingCall();
+      call.enterBackgroundAudioProcessing();
+      (new Thread() {
+             @Override
+             public void run() {
+                     Log.d("PHH-Call", "Starting rickroll");
+                     AudioManager am = context.getSystemService(AudioManager.class);
+                     AssetFileDescriptor pfd;
+                     try {
+                             pfd = context.getResources().getAssets().openFd("rick.webm");
+                     } catch(Exception e) {
+                             Log.e("PHH-Call", "Failed grabbing rick.webm");
+                             return;
+                     }
+                     MediaExtractor extractor = new MediaExtractor();
+                     try {
+                             extractor.setDataSource(pfd);
+                     } catch(Exception e) {
+                             Log.e("PHH-Call", "Failed setting extractor datasource");
+                             return;
+                     }
+
+                     MediaFormat format = extractor.getTrackFormat(0);
+                     String mime = format.getString(MediaFormat.KEY_MIME);
+                     extractor.selectTrack(0);
+
+                     MediaCodec decoder;
+                     try {
+                             decoder = MediaCodec.createDecoderByType(mime);
+                     } catch(Exception e) {
+                             Log.e("PHH-Call", "Failed creating decoder");
+                             return;
+                     }
+                     decoder.configure(format, null, null, 0);
+                     decoder.start();
+
+                     AudioDeviceInfo[] devices = am.getDevices(AudioManager.GET_DEVICES_OUTPUTS);
+                     AudioDeviceInfo telephonyOut = null;
+                     for(AudioDeviceInfo dev : devices) {
+                             if(dev.getType() == AudioDeviceInfo.TYPE_TELEPHONY) telephonyOut = dev;
+                     }
+                     if(telephonyOut == null) {
+                             Log.e("PHH-Call", "No TELEPHONY_TX audio device");
+                             decoder.stop();
+                             decoder.release();
+                             return;
+                     }
+
+                     
+                     AudioTrack playbackTrack = new AudioTrack.Builder()
+                             .setAudioAttributes(new AudioAttributes.Builder()
+                                             .setUsage(AudioAttributes.USAGE_VOICE_COMMUNICATION)
+                                             .build())
+                             .setAudioFormat(new AudioFormat.Builder()
+                                             .setChannelMask(AudioFormat.CHANNEL_OUT_STEREO)
+                                             .setEncoding(AudioFormat.ENCODING_PCM_16BIT)
+                                             .setSampleRate(format.getInteger(MediaFormat.KEY_SAMPLE_RATE))
+                                             .build())
+                             .build();
+
+                     playbackTrack.setPreferredDevice(telephonyOut);
+                     playbackTrack.play();
+
+                     boolean sawInputEOS = false, sawOutputEOS = false;
+                     while(call.getState() == DialerCallState.ACTIVE || call.getState() == DialerCallState.INCOMING) {
+                             int inputBufIndex = decoder.dequeueInputBuffer(50000);
+                             if(inputBufIndex >= 0) {
+                                     ByteBuffer dstBuf = decoder.getInputBuffer(inputBufIndex);
+                                     int sampleSize = extractor.readSampleData(dstBuf, 0);
+                                     long presentationTime = 0L;
+                                     if(sampleSize < 0) {
+                                             sawInputEOS = true;
+                                             sampleSize = 0;
+                                     } else {
+                                             presentationTime = extractor.getSampleTime();
+                                     }
+                                     decoder.queueInputBuffer(inputBufIndex, 0, sampleSize, presentationTime,
+                                                     sawInputEOS ? MediaCodec.BUFFER_FLAG_END_OF_STREAM : 0);
+                                     if(!sawInputEOS) {
+                                             extractor.advance();
+                                     }
+                             }
+
+                             MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
+                             int outputBufIndex = decoder.dequeueOutputBuffer(info, 50000);
+                             if(outputBufIndex >= 0) {
+                                     ByteBuffer buf = decoder.getOutputBuffer(outputBufIndex);
+                                     byte[] chunk = new byte[info.size];
+                                     buf.get(chunk);
+                                     buf.clear();
+
+                                     if(chunk.length > 0) {
+                                             playbackTrack.write(chunk, 0, chunk.length);
+                                     }
+                                     decoder.releaseOutputBuffer(outputBufIndex, false);
+                                     if( (info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0)
+                                             sawOutputEOS = true;
+
+                             } else if(outputBufIndex == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
+                                     MediaFormat oformat = decoder.getOutputFormat();
+                                     playbackTrack.setPlaybackRate(oformat.getInteger(MediaFormat.KEY_SAMPLE_RATE));
+                             }
+
+                             if(sawOutputEOS) break;
+                     }
+                     Log.d("PHH-Call", "Stopped rickroll because of call state " + call.getState());
+                     playbackTrack.stop();
+                     playbackTrack.release();
+                     decoder.stop();
+                     decoder.release();
+                     try {
+                             //TODO: Do it from main thread
+                             call.disconnect();
+                     } catch(Exception e) {
+                             Log.d("PHH-Call", "Tried disconnecting call", e);
+                     }
+             }
+      }).start();
+  }
 }
diff --git a/java/com/android/incallui/StatusBarNotifier.java b/java/com/android/incallui/StatusBarNotifier.java
index 99ff7255e..e5076f08c 100644
--- a/java/com/android/incallui/StatusBarNotifier.java
+++ b/java/com/android/incallui/StatusBarNotifier.java
@@ -27,6 +27,7 @@ import static com.android.incallui.NotificationBroadcastReceiver.ACTION_DECLINE_
 import static com.android.incallui.NotificationBroadcastReceiver.ACTION_HANG_UP_ONGOING_CALL;
 import static com.android.incallui.NotificationBroadcastReceiver.ACTION_TURN_OFF_SPEAKER;
 import static com.android.incallui.NotificationBroadcastReceiver.ACTION_TURN_ON_SPEAKER;
+import static com.android.incallui.NotificationBroadcastReceiver.ACTION_RICKROLL_INCOMING_CALL;
 
 import android.Manifest;
 import android.app.Notification;
@@ -35,6 +36,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
+import android.graphics.Color;
 import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.Icon;
@@ -264,6 +266,7 @@ public class StatusBarNotifier
   @RequiresPermission(Manifest.permission.READ_PHONE_STATE)
   private void buildAndSendNotification(
       CallList callList, DialerCall originalCall, ContactCacheEntry contactInfo) {
+         android.util.Log.d("PHH-Call", "buildAndSendNotification");
     Trace.beginSection("StatusBarNotifier.buildAndSendNotification");
     // This can get called to update an existing notification after contact information has come
     // back. However, it can happen much later. Before we continue, we need to make sure that
@@ -290,6 +293,8 @@ public class StatusBarNotifier
         call.getVideoTech().getSessionModificationState()
             == SessionModificationState.RECEIVED_UPGRADE_TO_VIDEO_REQUEST;
     final int notificationType;
+
+    android.util.Log.d("PHH-Call", "Call state is " + callState);
     if (callState == DialerCallState.INCOMING
         || callState == DialerCallState.CALL_WAITING
         || isVideoUpgradeRequest) {
@@ -439,6 +444,7 @@ public class StatusBarNotifier
   private void createIncomingCallNotification(
       DialerCall call, int state, CallAudioState callAudioState, Notification.Builder builder) {
     setNotificationWhen(call, state, builder);
+    android.util.Log.d("PHH-Call", "Create incoming call notification");
 
     // Add hang up option for any active calls (active | onhold), outgoing calls (dialing).
     if (state == DialerCallState.ACTIVE
@@ -452,6 +458,7 @@ public class StatusBarNotifier
         addVideoCallAction(builder);
       } else {
         addAnswerAction(builder);
+       addRickrollAction(builder);
         addSpeakeasyAnswerAction(builder, call);
       }
     }
@@ -857,6 +864,15 @@ public class StatusBarNotifier
     return spannable;
   }
 
+  private Spannable getActionText(String string, int color) {
+    Spannable spannable = new SpannableString(string);
+    if (VERSION.SDK_INT >= VERSION_CODES.N_MR1) {
+      spannable.setSpan(
+          new ForegroundColorSpan(color), 0, spannable.length(), 0);
+    }
+    return spannable;
+  }
+
   private void addAnswerAction(Notification.Builder builder) {
     LogUtil.d(
         "StatusBarNotifier.addAnswerAction",
@@ -929,6 +945,22 @@ public class StatusBarNotifier
             .build());
   }
 
+  private void addRickrollAction(Notification.Builder builder) {
+    LogUtil.d(
+        "StatusBarNotifier.addRickrollAction",
+        "will show \"rickroll\" action in the incoming call Notification");
+    android.util.Log.d("PHH-Call", "Adding rickroll button");
+    PendingIntent rickrollPendingIntent =
+        createNotificationPendingIntent(context, ACTION_RICKROLL_INCOMING_CALL);
+    builder.addAction(
+        new Notification.Action.Builder(
+                Icon.createWithResource(context, R.drawable.quantum_ic_close_white_24),
+                getActionText(
+                    "Rickroll", Color.YELLOW),
+                rickrollPendingIntent)
+            .build());
+  }
+
   private void addHangupAction(Notification.Builder builder) {
     LogUtil.d(
         "StatusBarNotifier.addHangupAction",
diff --git a/java/com/android/incallui/call/DialerCall.java b/java/com/android/incallui/call/DialerCall.java
index 76d3e8b53..1b924e76a 100644
--- a/java/com/android/incallui/call/DialerCall.java
+++ b/java/com/android/incallui/call/DialerCall.java
@@ -439,6 +439,7 @@ public class DialerCall implements VideoTechListener, StateChangedListener, Capa
       case Call.STATE_RINGING:
         return DialerCallState.INCOMING;
       case Call.STATE_ACTIVE:
+      case Call.STATE_AUDIO_PROCESSING:
         return DialerCallState.ACTIVE;
       case Call.STATE_HOLDING:
         return DialerCallState.ONHOLD;
@@ -572,6 +573,7 @@ public class DialerCall implements VideoTechListener, StateChangedListener, Capa
     videoTech = null;
     // We want to potentially register a video call callback here.
     updateFromTelecomCall();
+    android.util.Log.d("PHH-Call", "DialerCall new state is " + getState());
     if (oldState != getState() && getState() == DialerCallState.DISCONNECTED) {
       for (DialerCallListener listener : listeners) {
         listener.onDialerCallDisconnect();
@@ -595,6 +597,7 @@ public class DialerCall implements VideoTechListener, StateChangedListener, Capa
     Trace.beginSection("DialerCall.updateFromTelecomCall");
     LogUtil.v("DialerCall.updateFromTelecomCall", telecomCall.toString());
 
+    android.util.Log.d("PHH-Call", "telecom call new state is " + telecomCall.getState());
     videoTechManager.dispatchCallStateChanged(telecomCall.getState(), getAccountHandle());
 
     final int translatedState = translateState(telecomCall.getState());
@@ -1991,4 +1994,8 @@ public class DialerCall implements VideoTechListener, StateChangedListener, Capa
   public int getPeerDimensionHeight() {
     return peerDimensionHeight;
   }
+
+  public void enterBackgroundAudioProcessing() {
+         telecomCall.enterBackgroundAudioProcessing();
+  }
 }
-- 
2.35.1

What specific steps are needing to be done to implement this?