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am 56c119ab: Merge "CEC: Handles initiation of press-and-hold correctly" into lmp-mr1-dev

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* commit '56c119abde951146951e3887796eb64ee05d25d3':
  CEC: Handles initiation of press-and-hold correctly
This commit is contained in:
Jinsuk Kim
2015-01-23 21:16:48 +00:00
committed by Android Git Automerger
parent bb8d7ffeae 56c119abde
commit ca1384dc5a
1 changed files with 34 additions and 12 deletions
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46
services/core/java/com/android/server/hdmi/SendKeyAction.java
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@@ -35,14 +35,25 @@ import android.view.KeyEvent;
final class SendKeyAction extends HdmiCecFeatureAction {
private static final String TAG = "SendKeyAction";
// If the first key press lasts this much amount of time without any other key event
// coming down, we trigger the press-and-hold operation. Set to the value slightly
// shorter than the threshold(500ms) between two successive key press events
// as specified in the standard for the operation.
private static final int AWAIT_LONGPRESS_MS = 400;
// Amount of time this action waits for a new release key input event. When timed out,
// the action sends out UCR and finishes its lifecycle. Used to deal with missing key release
// event, which can lead the device on the receiving end to generating unintended key repeats.
private static final int AWAIT_RELEASE_KEY_MS = 1000;
// State in which the action is at work. The state is set in {@link #start()} and
// persists throughout the process till it is set back to {@code STATE_NONE} at the end.
private static final int STATE_PROCESSING_KEYCODE = 1;
// State in which the long press is being checked at the beginning. The state is set in
// {@link #start()} and lasts for {@link #AWAIT_LONGPRESS_MS}.
private static final int STATE_CHECKING_LONGPRESS = 1;
// State in which the action is handling incoming keys. Persists throughout the process
// till it is set back to {@code STATE_NONE} at the end when a release key event for
// the last key is processed.
private static final int STATE_PROCESSING_KEYCODE = 2;
// Logical address of the device to which the UCP/UCP commands are sent.
private final int mTargetAddress;
@@ -77,8 +88,8 @@ final class SendKeyAction extends HdmiCecFeatureAction {
finish();
return true;
}
mState = STATE_PROCESSING_KEYCODE;
addTimer(mState, AWAIT_RELEASE_KEY_MS);
mState = STATE_CHECKING_LONGPRESS;
addTimer(mState, AWAIT_LONGPRESS_MS);
return true;
}
@@ -93,7 +104,7 @@ final class SendKeyAction extends HdmiCecFeatureAction {
* @param isPressed true if the key event is of {@link KeyEvent#ACTION_DOWN}
*/
void processKeyEvent(int keycode, boolean isPressed) {
if (mState != STATE_PROCESSING_KEYCODE) {
if (mState != STATE_CHECKING_LONGPRESS && mState != STATE_PROCESSING_KEYCODE) {
Slog.w(TAG, "Not in a valid state");
return;
}
@@ -152,12 +163,23 @@ final class SendKeyAction extends HdmiCecFeatureAction {
@Override
public void handleTimerEvent(int state) {
// Timeout on waiting for the release key event. Send UCR and quit the action.
if (mState != STATE_PROCESSING_KEYCODE) {
Slog.w(TAG, "Not in a valid state");
return;
switch (mState) {
case STATE_CHECKING_LONGPRESS:
// The first key press lasts long enough to start press-and-hold.
mActionTimer.clearTimerMessage();
mState = STATE_PROCESSING_KEYCODE;
sendKeyDown(mLastKeycode);
mLastSendKeyTime = getCurrentTime();
addTimer(mState, AWAIT_RELEASE_KEY_MS);
break;
case STATE_PROCESSING_KEYCODE:
// Timeout on waiting for the release key event. Send UCR and quit the action.
sendKeyUp();
finish();
break;
default:
Slog.w(TAG, "Not in a valid state");
break;
}
sendKeyUp();
finish();
}
}