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      1 /*
      2  * Copyright (C) 2015 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 #pragma once
     18 
     19 #include <Volume.h>
     20 #include <utils/KeyedVector.h>
     21 #include <utils/StrongPointer.h>
     22 #include <utils/SortedVector.h>
     23 #include <hardware/audio.h>
     24 
     25 namespace android {
     26 
     27 // stream descriptor used for volume control
     28 class StreamDescriptor
     29 {
     30 public:
     31     StreamDescriptor();
     32 
     33     int getVolumeIndex(audio_devices_t device) const;
     34     bool canBeMuted() const { return mCanBeMuted; }
     35     void clearCurrentVolumeIndex();
     36     void addCurrentVolumeIndex(audio_devices_t device, int index);
     37     int getVolumeIndexMin() const { return mIndexMin; }
     38     int getVolumeIndexMax() const { return mIndexMax; }
     39     void setVolumeIndexMin(int volIndexMin);
     40     void setVolumeIndexMax(int volIndexMax);
     41 
     42     void dump(int fd) const;
     43 
     44     void setVolumeCurvePoint(Volume::device_category deviceCategory, const VolumeCurvePoint *point);
     45     const VolumeCurvePoint *getVolumeCurvePoint(Volume::device_category deviceCategory) const
     46     {
     47         return mVolumeCurve[deviceCategory];
     48     }
     49 
     50 private:
     51     const VolumeCurvePoint *mVolumeCurve[Volume::DEVICE_CATEGORY_CNT];
     52     KeyedVector<audio_devices_t, int> mIndexCur; /**< current volume index per device. */
     53     int mIndexMin; /**< min volume index. */
     54     int mIndexMax; /**< max volume index. */
     55     bool mCanBeMuted; /**< true is the stream can be muted. */
     56 };
     57 
     58 /**
     59  * stream descriptors collection for volume control
     60  */
     61 class StreamDescriptorCollection : public DefaultKeyedVector<audio_stream_type_t, StreamDescriptor>
     62 {
     63 public:
     64     StreamDescriptorCollection();
     65 
     66     void clearCurrentVolumeIndex(audio_stream_type_t stream);
     67     void addCurrentVolumeIndex(audio_stream_type_t stream, audio_devices_t device, int index);
     68 
     69     bool canBeMuted(audio_stream_type_t stream);
     70 
     71     status_t dump(int fd) const;
     72 
     73     void setVolumeCurvePoint(audio_stream_type_t stream,
     74                              Volume::device_category deviceCategory,
     75                              const VolumeCurvePoint *point);
     76 
     77     const VolumeCurvePoint *getVolumeCurvePoint(audio_stream_type_t stream,
     78                                                 Volume::device_category deviceCategory) const;
     79 
     80     void setVolumeIndexMin(audio_stream_type_t stream,int volIndexMin);
     81     void setVolumeIndexMax(audio_stream_type_t stream,int volIndexMax);
     82 
     83 };
     84 
     85 }; // namespace android
     86