2 * Copyright (C) 2007 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #ifndef ANDROID_AUDIO_HARDWARE_BASE_H
18 #define ANDROID_AUDIO_HARDWARE_BASE_H
20 #include <hardware_legacy/AudioHardwareInterface.h>
22 #include <system/audio.h>
24 namespace android_audio_legacy {
26 // ----------------------------------------------------------------------------
29 * AudioHardwareBase is a convenient base class used for implementing the
30 * AudioHardwareInterface interface.
32 class AudioHardwareBase : public AudioHardwareInterface
36 virtual ~AudioHardwareBase() { }
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.
43 virtual status_t setMode(int mode);
45 virtual status_t setParameters(const String8& keyValuePairs);
46 virtual String8 getParameters(const String8& keys);
48 virtual size_t getInputBufferSize(uint32_t sampleRate, int format, int channelCount);
49 virtual status_t getMasterVolume(float *volume);
51 /**This method dumps the state of the audio hardware */
52 virtual status_t dumpState(int fd, const Vector<String16>& args);
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); };
64 }; // namespace android
66 #endif // ANDROID_AUDIO_HARDWARE_BASE_H