| /* |
| * Copyright (C) 2015 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.tv.receiver; |
| |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.SharedPreferences; |
| import android.media.AudioFormat; |
| import android.media.AudioManager; |
| import android.support.annotation.NonNull; |
| import android.support.annotation.Nullable; |
| import com.android.tv.TvSingletons; |
| import com.android.tv.analytics.Analytics; |
| import com.android.tv.analytics.Tracker; |
| import com.android.tv.common.util.SharedPreferencesUtils; |
| |
| /** |
| * Creates HDMI plug broadcast receiver, and reports AC3 passthrough capabilities to Google |
| * Analytics and listeners. Call {@link #register} to start receiving notifications, and {@link |
| * #unregister} to stop. |
| */ |
| public final class AudioCapabilitiesReceiver { |
| private static final String SETTINGS_KEY_AC3_PASSTHRU_REPORTED = "ac3_passthrough_reported"; |
| private static final String SETTINGS_KEY_AC3_PASSTHRU_CAPABILITIES = "ac3_passthrough"; |
| private static final String SETTINGS_KEY_AC3_REPORT_REVISION = "ac3_report_revision"; |
| |
| // AC3 capabilities stat is sent to Google Analytics just once in order to avoid |
| // duplicated stat reports since it doesn't change over time in most cases. |
| // Increase this revision when we should force the stat to be sent again. |
| // TODO: Consider using custom metrics. |
| private static final int REPORT_REVISION = 1; |
| |
| private final Context mContext; |
| private final Analytics mAnalytics; |
| private final Tracker mTracker; |
| @Nullable private final OnAc3PassthroughCapabilityChangeListener mListener; |
| private final BroadcastReceiver mReceiver = new HdmiAudioPlugBroadcastReceiver(); |
| |
| /** |
| * Constructs a new audio capabilities receiver. |
| * |
| * @param context context for registering to receive broadcasts |
| * @param listener listener which receives AC3 passthrough capability change notification |
| */ |
| public AudioCapabilitiesReceiver( |
| @NonNull Context context, @Nullable OnAc3PassthroughCapabilityChangeListener listener) { |
| mContext = context; |
| TvSingletons tvSingletons = TvSingletons.getSingletons(context); |
| mAnalytics = tvSingletons.getAnalytics(); |
| mTracker = tvSingletons.getTracker(); |
| mListener = listener; |
| } |
| |
| public void register() { |
| mContext.registerReceiver(mReceiver, new IntentFilter(AudioManager.ACTION_HDMI_AUDIO_PLUG)); |
| } |
| |
| public void unregister() { |
| mContext.unregisterReceiver(mReceiver); |
| } |
| |
| private final class HdmiAudioPlugBroadcastReceiver extends BroadcastReceiver { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| String action = intent.getAction(); |
| if (!action.equals(AudioManager.ACTION_HDMI_AUDIO_PLUG)) { |
| return; |
| } |
| boolean supported = false; |
| int[] supportedEncodings = intent.getIntArrayExtra(AudioManager.EXTRA_ENCODINGS); |
| if (supportedEncodings != null) { |
| for (int supportedEncoding : supportedEncodings) { |
| if (supportedEncoding == AudioFormat.ENCODING_AC3) { |
| supported = true; |
| break; |
| } |
| } |
| } |
| if (mListener != null) { |
| mListener.onAc3PassthroughCapabilityChange(supported); |
| } |
| if (!mAnalytics.isAppOptOut()) { |
| reportAudioCapabilities(supported); |
| } |
| } |
| } |
| |
| private void reportAudioCapabilities(boolean ac3Supported) { |
| boolean oldVal = getBoolean(SETTINGS_KEY_AC3_PASSTHRU_CAPABILITIES, false); |
| boolean reported = getBoolean(SETTINGS_KEY_AC3_PASSTHRU_REPORTED, false); |
| int revision = getInt(SETTINGS_KEY_AC3_REPORT_REVISION, 0); |
| |
| // Send the value just once. But we send it again if the value changed, to include |
| // the case where users have switched TV device with different AC3 passthrough capabilities. |
| if (!reported || oldVal != ac3Supported || REPORT_REVISION > revision) { |
| mTracker.sendAc3PassthroughCapabilities(ac3Supported); |
| setBoolean(SETTINGS_KEY_AC3_PASSTHRU_REPORTED, true); |
| setBoolean(SETTINGS_KEY_AC3_PASSTHRU_CAPABILITIES, ac3Supported); |
| if (REPORT_REVISION > revision) { |
| setInt(SETTINGS_KEY_AC3_REPORT_REVISION, REPORT_REVISION); |
| } |
| } |
| } |
| |
| private SharedPreferences getSharedPreferences() { |
| return mContext.getSharedPreferences( |
| SharedPreferencesUtils.SHARED_PREF_AUDIO_CAPABILITIES, Context.MODE_PRIVATE); |
| } |
| |
| private boolean getBoolean(String key, boolean def) { |
| return getSharedPreferences().getBoolean(key, def); |
| } |
| |
| private void setBoolean(String key, boolean val) { |
| getSharedPreferences().edit().putBoolean(key, val).apply(); |
| } |
| |
| private int getInt(String key, int def) { |
| return getSharedPreferences().getInt(key, def); |
| } |
| |
| private void setInt(String key, int val) { |
| getSharedPreferences().edit().putInt(key, val).apply(); |
| } |
| |
| /** Listener notified when AC3 passthrough capability changes. */ |
| public interface OnAc3PassthroughCapabilityChangeListener { |
| /** Called when the AC3 passthrough capability changes. */ |
| void onAc3PassthroughCapabilityChange(boolean capability); |
| } |
| } |