Fix issue: 2413494: [Passion-c] Add TTY support.
Handle TTY mode change events received by HeadsetObserver and send information down to AudioHardware with AudioManager.setParameters()
Use setting "tty_mode_uses_heaset_events" in core config.xml to indicate if the product uses this particular
method of indicating the TTY mode change.
diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index 0b6f97e..6cd6ff9 100644
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -218,4 +218,8 @@
<!-- Component name of the default wallpaper. This will be ImageWallpaper if not
specified -->
<string name="default_wallpaper_component">@null</string>
+
+ <!-- Flag indicating whether headset events are used by kernel to indicate
+ TTY mode changes. -->
+ <bool name="tty_mode_uses_headset_events">false</bool>
</resources>
diff --git a/services/java/com/android/server/HeadsetObserver.java b/services/java/com/android/server/HeadsetObserver.java
index 9d69564..c94450b 100644
--- a/services/java/com/android/server/HeadsetObserver.java
+++ b/services/java/com/android/server/HeadsetObserver.java
@@ -53,6 +53,19 @@
private final Context mContext;
private final WakeLock mWakeLock; // held while there is a pending route change
+ private boolean mHandleTTY;
+ private int mTTYState;
+ private AudioManager mAudioManager = null;
+
+ // special use of bits in headset state received from kernel made by some
+ // platforms to indicate changes in TTY mode.
+ private static final int BIT_TTY_OFF = 0;
+ private static final int BIT_TTY_FULL = (1 << 2);
+ private static final int BIT_TTY_VCO = (1 << 5);
+ private static final int BIT_TTY_HCO = (1 << 6);
+ private static final int TTY_BITS_MASK = (BIT_TTY_FULL | BIT_TTY_VCO | BIT_TTY_HCO);
+
+
public HeadsetObserver(Context context) {
mContext = context;
PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
@@ -61,6 +74,11 @@
startObserving(HEADSET_UEVENT_MATCH);
+ // read settings for TTY mode indication method
+ mHandleTTY = context.getResources().getBoolean(
+ com.android.internal.R.bool.tty_mode_uses_headset_events);
+ mTTYState = BIT_TTY_OFF;
+
init(); // set initial status
}
@@ -100,6 +118,39 @@
}
private synchronized final void update(String newName, int newState) {
+ // handle TTY state change first
+ if (mHandleTTY) {
+ int ttyState = newState & TTY_BITS_MASK;
+ if (ttyState != mTTYState) {
+ String ttyMode;
+
+ switch (ttyState) {
+ case BIT_TTY_FULL:
+ ttyMode = "tty_full";
+ break;
+ case BIT_TTY_VCO:
+ ttyMode = "tty_vco";
+ break;
+ case BIT_TTY_HCO:
+ ttyMode = "tty_hco";
+ break;
+ case BIT_TTY_OFF:
+ ttyMode = "tty_off";
+ break;
+ default:
+ ttyMode = "tty_invalid";
+ break;
+
+ }
+ if (ttyMode != "tty_invalid") {
+ mTTYState = ttyState;
+ if (mAudioManager == null) {
+ mAudioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
+ }
+ mAudioManager.setParameters("tty_mode="+ttyMode);
+ }
+ }
+ }
// Retain only relevant bits
int headsetState = newState & SUPPORTED_HEADSETS;
int newOrOld = headsetState | mHeadsetState;