| /* |
| * Copyright 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.server.telecom; |
| |
| import android.content.Context; |
| import android.media.AudioManager; |
| import android.media.ToneGenerator; |
| import android.provider.Settings; |
| |
| // TODO: Needed for move to system service: import com.android.internal.R; |
| import com.google.common.collect.ImmutableMap; |
| |
| import java.util.Map; |
| |
| /** |
| * Plays DTMF tones locally for the caller to hear. In order to reduce (1) the amount of times we |
| * check the "play local tones" setting and (2) the length of time we keep the tone generator, this |
| * class employs a concept of a call "session" that starts and stops when the foreground call |
| * changes. |
| */ |
| class DtmfLocalTonePlayer extends CallsManagerListenerBase { |
| private static final Map<Character, Integer> TONE_MAP = |
| ImmutableMap.<Character, Integer>builder() |
| .put('1', ToneGenerator.TONE_DTMF_1) |
| .put('2', ToneGenerator.TONE_DTMF_2) |
| .put('3', ToneGenerator.TONE_DTMF_3) |
| .put('4', ToneGenerator.TONE_DTMF_4) |
| .put('5', ToneGenerator.TONE_DTMF_5) |
| .put('6', ToneGenerator.TONE_DTMF_6) |
| .put('7', ToneGenerator.TONE_DTMF_7) |
| .put('8', ToneGenerator.TONE_DTMF_8) |
| .put('9', ToneGenerator.TONE_DTMF_9) |
| .put('0', ToneGenerator.TONE_DTMF_0) |
| .put('#', ToneGenerator.TONE_DTMF_P) |
| .put('*', ToneGenerator.TONE_DTMF_S) |
| .build(); |
| |
| /** Generator used to actually play the tone. */ |
| private ToneGenerator mToneGenerator; |
| |
| /** The current call associated with an existing dtmf session. */ |
| private Call mCall; |
| |
| /** The context. */ |
| private final Context mContext; |
| |
| public DtmfLocalTonePlayer(Context context) { |
| mContext = context; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void onForegroundCallChanged(Call oldForegroundCall, Call newForegroundCall) { |
| endDtmfSession(oldForegroundCall); |
| startDtmfSession(newForegroundCall); |
| } |
| |
| /** |
| * Starts playing the dtmf tone specified by c. |
| * |
| * @param call The associated call. |
| * @param c The digit to play. |
| */ |
| void playTone(Call call, char c) { |
| // Do nothing if it is not the right call. |
| if (mCall != call) { |
| return; |
| } |
| |
| if (mToneGenerator == null) { |
| Log.d(this, "playTone: mToneGenerator == null, %c.", c); |
| } else { |
| Log.d(this, "starting local tone: %c.", c); |
| if (TONE_MAP.containsKey(c)) { |
| mToneGenerator.startTone(TONE_MAP.get(c), -1 /* toneDuration */); |
| } |
| } |
| } |
| |
| /** |
| * Stops any currently playing dtmf tone. |
| * |
| * @param call The associated call. |
| */ |
| void stopTone(Call call) { |
| // Do nothing if it's not the right call. |
| if (mCall != call) { |
| return; |
| } |
| |
| if (mToneGenerator == null) { |
| Log.d(this, "stopTone: mToneGenerator == null."); |
| } else { |
| Log.d(this, "stopping local tone."); |
| mToneGenerator.stopTone(); |
| } |
| } |
| |
| /** |
| * Runs initialization requires to play local tones during a call. |
| * |
| * @param call The call associated with this dtmf session. |
| */ |
| private void startDtmfSession(Call call) { |
| if (call == null) { |
| return; |
| } |
| final Context context = call.getContext(); |
| final boolean areLocalTonesEnabled; |
| if (context.getResources().getBoolean(R.bool.allow_local_dtmf_tones)) { |
| areLocalTonesEnabled = Settings.System.getInt( |
| context.getContentResolver(), Settings.System.DTMF_TONE_WHEN_DIALING, 1) == 1; |
| } else { |
| areLocalTonesEnabled = false; |
| } |
| |
| mCall = call; |
| |
| if (areLocalTonesEnabled) { |
| if (mToneGenerator == null) { |
| try { |
| mToneGenerator = new ToneGenerator(AudioManager.STREAM_DTMF, 80); |
| } catch (RuntimeException e) { |
| Log.e(this, e, "Error creating local tone generator."); |
| mToneGenerator = null; |
| } |
| } |
| } |
| } |
| |
| /** |
| * Releases resources needed for playing local dtmf tones. |
| * |
| * @param call The call associated with the session to end. |
| */ |
| private void endDtmfSession(Call call) { |
| if (call != null && mCall == call) { |
| // Do a stopTone() in case the sessions ends before we are told to stop the tone. |
| stopTone(call); |
| |
| mCall = null; |
| |
| if (mToneGenerator != null) { |
| mToneGenerator.release(); |
| mToneGenerator = null; |
| } |
| } |
| } |
| } |