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