1 /* 2 * Copyright (C) 2007 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 #ifndef ANDROID_AUDIO_HARDWARE_BASE_H 18 #define ANDROID_AUDIO_HARDWARE_BASE_H 19 20 #include "hardware_legacy/AudioHardwareInterface.h" 21 22 23 namespace android { 24 25 // ---------------------------------------------------------------------------- 26 27 /** 28 * AudioHardwareBase is a convenient base class used for implementing the 29 * AudioHardwareInterface interface. 30 */ 31 class AudioHardwareBase : public AudioHardwareInterface 32 { 33 public: 34 AudioHardwareBase(); ~AudioHardwareBase()35 virtual ~AudioHardwareBase() { } 36 37 /** 38 * setMode is called when the audio mode changes. NORMAL mode is for 39 * standard audio playback, RINGTONE when a ringtone is playing, IN_CALL 40 * when a telephony call is in progress, IN_COMMUNICATION when a VoIP call is in progress. 41 */ 42 virtual status_t setMode(int mode); 43 44 virtual status_t setParameters(const String8& keyValuePairs); 45 virtual String8 getParameters(const String8& keys); 46 47 virtual size_t getInputBufferSize(uint32_t sampleRate, int format, int channelCount); 48 49 /**This method dumps the state of the audio hardware */ 50 virtual status_t dumpState(int fd, const Vector<String16>& args); 51 52 protected: 53 /** returns true if the given mode maps to a telephony or VoIP call is in progress */ isModeInCall(int mode)54 virtual bool isModeInCall(int mode) 55 { return ((mode == AudioSystem::MODE_IN_CALL) 56 || (mode == AudioSystem::MODE_IN_COMMUNICATION)); }; 57 /** returns true if a telephony or VoIP call is in progress */ isInCall()58 virtual bool isInCall() { return isModeInCall(mMode); }; 59 int mMode; 60 }; 61 62 }; // namespace android 63 64 #endif // ANDROID_AUDIO_HARDWARE_BASE_H 65