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 #include <system/audio.h> 23 24 namespace android_audio_legacy { 25 26 // ---------------------------------------------------------------------------- 27 28 /** 29 * AudioHardwareBase is a convenient base class used for implementing the 30 * AudioHardwareInterface interface. 31 */ 32 class AudioHardwareBase : public AudioHardwareInterface 33 { 34 public: 35 AudioHardwareBase(); 36 virtual ~AudioHardwareBase() { } 37 38 /** 39 * setMode is called when the audio mode changes. NORMAL mode is for 40 * standard audio playback, RINGTONE when a ringtone is playing, IN_CALL 41 * when a telephony call is in progress, IN_COMMUNICATION when a VoIP call is in progress. 42 */ 43 virtual status_t setMode(int mode); 44 45 virtual status_t setParameters(const String8& keyValuePairs); 46 virtual String8 getParameters(const String8& keys); 47 48 virtual size_t getInputBufferSize(uint32_t sampleRate, int format, int channelCount); 49 virtual status_t getMasterVolume(float *volume); 50 51 /**This method dumps the state of the audio hardware */ 52 virtual status_t dumpState(int fd, const Vector<String16>& args); 53 54 protected: 55 /** returns true if the given mode maps to a telephony or VoIP call is in progress */ 56 virtual bool isModeInCall(int mode) 57 { return ((mode == AudioSystem::MODE_IN_CALL) 58 || (mode == AudioSystem::MODE_IN_COMMUNICATION)); }; 59 /** returns true if a telephony or VoIP call is in progress */ 60 virtual bool isInCall() { return isModeInCall(mMode); }; 61 int mMode; 62 }; 63 64 }; // namespace android 65 66 #endif // ANDROID_AUDIO_HARDWARE_BASE_H 67
