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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.media;
     18 
     19 import android.annotation.NonNull;
     20 import android.annotation.SystemApi;
     21 import android.media.VolumeShaper;
     22 import android.os.RemoteException;
     23 import android.util.Log;
     24 
     25 import java.lang.IllegalArgumentException;
     26 import java.util.Objects;
     27 
     28 /**
     29  * Class to remotely control a player.
     30  * @hide
     31  */
     32 @SystemApi
     33 public class PlayerProxy {
     34 
     35     private final static String TAG = "PlayerProxy";
     36     private final static boolean DEBUG = false;
     37 
     38     private final AudioPlaybackConfiguration mConf; // never null
     39 
     40     /**
     41      * @hide
     42      * Constructor. Proxy for this player associated with this AudioPlaybackConfiguration
     43      * @param conf the configuration being proxied.
     44      */
     45     PlayerProxy(@NonNull AudioPlaybackConfiguration apc) {
     46         if (apc == null) {
     47             throw new IllegalArgumentException("Illegal null AudioPlaybackConfiguration");
     48         }
     49         mConf = apc;
     50     };
     51 
     52     //=====================================================================
     53     // Methods matching the IPlayer interface
     54     /**
     55      * @hide
     56      */
     57     @SystemApi
     58     public void start() {
     59         try {
     60             mConf.getIPlayer().start();
     61         } catch (NullPointerException|RemoteException e) {
     62             throw new IllegalStateException(
     63                     "No player to proxy for start operation, player already released?", e);
     64         }
     65     }
     66 
     67     /**
     68      * @hide
     69      */
     70     @SystemApi
     71     public void pause() {
     72         try {
     73             mConf.getIPlayer().pause();
     74         } catch (NullPointerException|RemoteException e) {
     75             throw new IllegalStateException(
     76                     "No player to proxy for pause operation, player already released?", e);
     77         }
     78     }
     79 
     80     /**
     81      * @hide
     82      */
     83     @SystemApi
     84     public void stop() {
     85         try {
     86             mConf.getIPlayer().stop();
     87         } catch (NullPointerException|RemoteException e) {
     88             throw new IllegalStateException(
     89                     "No player to proxy for stop operation, player already released?", e);
     90         }
     91     }
     92 
     93     /**
     94      * @hide
     95      * @param vol
     96      */
     97     @SystemApi
     98     public void setVolume(float vol) {
     99         try {
    100             mConf.getIPlayer().setVolume(vol);
    101         } catch (NullPointerException|RemoteException e) {
    102             throw new IllegalStateException(
    103                     "No player to proxy for setVolume operation, player already released?", e);
    104         }
    105     }
    106 
    107     /**
    108      * @hide
    109      * @param pan
    110      */
    111     @SystemApi
    112     public void setPan(float pan) {
    113         try {
    114             mConf.getIPlayer().setPan(pan);
    115         } catch (NullPointerException|RemoteException e) {
    116             throw new IllegalStateException(
    117                     "No player to proxy for setPan operation, player already released?", e);
    118         }
    119     }
    120 
    121     /**
    122      * @hide
    123      * @param delayMs
    124      */
    125     @SystemApi
    126     public void setStartDelayMs(int delayMs) {
    127         try {
    128             mConf.getIPlayer().setStartDelayMs(delayMs);
    129         } catch (NullPointerException|RemoteException e) {
    130             throw new IllegalStateException(
    131                     "No player to proxy for setStartDelayMs operation, player already released?",
    132                     e);
    133         }
    134     }
    135 
    136     /**
    137      * @hide
    138      * @param configuration
    139      * @param operation
    140      * @return volume shaper id or error
    141      */
    142     public void applyVolumeShaper(
    143             @NonNull VolumeShaper.Configuration configuration,
    144             @NonNull VolumeShaper.Operation operation) {
    145         try {
    146             mConf.getIPlayer().applyVolumeShaper(configuration, operation);
    147         } catch (NullPointerException|RemoteException e) {
    148             throw new IllegalStateException(
    149                     "No player to proxy for applyVolumeShaper operation,"
    150                     + " player already released?", e);
    151         }
    152     }
    153 }
    154