123 lines
3.6 KiB
C++
123 lines
3.6 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_AUDIOSYSTEM_H_
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#define ANDROID_AUDIOSYSTEM_H_
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#include <utils/RefBase.h>
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#include <utils/threads.h>
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#include <media/IAudioFlinger.h>
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namespace android {
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typedef void (*audio_error_callback)(status_t err);
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class AudioSystem
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{
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public:
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enum audio_format {
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DEFAULT = 0,
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PCM_16_BIT,
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PCM_8_BIT,
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INVALID_FORMAT
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};
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enum audio_mode {
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MODE_INVALID = -2,
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MODE_CURRENT = -1,
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MODE_NORMAL = 0,
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MODE_RINGTONE,
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MODE_IN_CALL,
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NUM_MODES // not a valid entry, denotes end-of-list
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};
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enum audio_routes {
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ROUTE_EARPIECE = (1 << 0),
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ROUTE_SPEAKER = (1 << 1),
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ROUTE_BLUETOOTH = (1 << 2),
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ROUTE_HEADSET = (1 << 3),
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ROUTE_ALL = (ROUTE_EARPIECE | ROUTE_SPEAKER | ROUTE_BLUETOOTH | ROUTE_HEADSET)
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};
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/* These are static methods to control the system-wide AudioFlinger
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* only privileged processes can have access to them
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*/
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// routing helper functions
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static status_t speakerphone(bool state);
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static status_t isSpeakerphoneOn(bool* state);
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static status_t bluetoothSco(bool state);
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static status_t isBluetoothScoOn(bool* state);
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static status_t muteMicrophone(bool state);
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static status_t isMicrophoneMuted(bool *state);
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static status_t setMasterVolume(float value);
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static status_t setMasterMute(bool mute);
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static status_t getMasterVolume(float* volume);
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static status_t getMasterMute(bool* mute);
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static status_t setStreamVolume(int stream, float value);
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static status_t setStreamMute(int stream, bool mute);
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static status_t getStreamVolume(int stream, float* volume);
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static status_t getStreamMute(int stream, bool* mute);
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static status_t setMode(int mode);
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static status_t getMode(int* mode);
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static status_t setRouting(int mode, uint32_t routes, uint32_t mask);
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static status_t getRouting(int mode, uint32_t* routes);
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static status_t isMusicActive(bool *state);
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// Temporary interface, do not use
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// TODO: Replace with a more generic key:value get/set mechanism
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static status_t setParameter(const char* key, const char* value);
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static void setErrorCallback(audio_error_callback cb);
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// helper function to obtain AudioFlinger service handle
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static const sp<IAudioFlinger>& get_audio_flinger();
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static float linearToLog(int volume);
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static int logToLinear(float volume);
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// ----------------------------------------------------------------------------
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private:
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class DeathNotifier: public IBinder::DeathRecipient
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{
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public:
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DeathNotifier() {
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}
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virtual void binderDied(const wp<IBinder>& who);
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};
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static sp<DeathNotifier> gDeathNotifier;
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friend class DeathNotifier;
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static Mutex gLock;
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static sp<IAudioFlinger> gAudioFlinger;
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static audio_error_callback gAudioErrorCallback;
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};
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}; // namespace android
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#endif /*ANDROID_AUDIOSYSTEM_H_*/
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