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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 stream_type {
DEFAULT =-1,
VOICE_CALL = 0,
SYSTEM = 1,
RING = 2,
MUSIC = 3,
ALARM = 4,
NOTIFICATION = 5,
BLUETOOTH_SCO = 6,
ENFORCED_AUDIBLE = 7, // Sounds that cannot be muted by user and must be routed to speaker
NUM_STREAM_TYPES
};
enum audio_output_type {
AUDIO_OUTPUT_DEFAULT =-1,
AUDIO_OUTPUT_HARDWARE = 0,
AUDIO_OUTPUT_A2DP = 1,
NUM_AUDIO_OUTPUT_TYPES
};
enum audio_format {
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_SCO = (1 << 2),
ROUTE_HEADSET = (1 << 3),
ROUTE_BLUETOOTH_A2DP = (1 << 4),
ROUTE_ALL = -1UL,
};
enum audio_in_acoustics {
AGC_ENABLE = 0x0001,
AGC_DISABLE = 0,
NS_ENABLE = 0x0002,
NS_DISABLE = 0,
TX_IIR_ENABLE = 0x0004,
TX_DISABLE = 0
};
/* 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);
static status_t getOutputSamplingRate(int* samplingRate, int stream = DEFAULT);
static status_t getOutputFrameCount(int* frameCount, int stream = DEFAULT);
static status_t getOutputLatency(uint32_t* latency, int stream = DEFAULT);
static bool routedToA2dpOutput(int streamType);
static status_t getInputBufferSize(uint32_t sampleRate, int format, int channelCount,
size_t* buffSize);
// ----------------------------------------------------------------------------
private:
class AudioFlingerClient: public IBinder::DeathRecipient, public BnAudioFlingerClient
{
public:
AudioFlingerClient() {
}
// DeathRecipient
virtual void binderDied(const wp<IBinder>& who);
// IAudioFlingerClient
virtual void a2dpEnabledChanged(bool enabled);
};
static int getOutput(int streamType);
static sp<AudioFlingerClient> gAudioFlingerClient;
friend class AudioFlingerClient;
static Mutex gLock;
static sp<IAudioFlinger> gAudioFlinger;
static audio_error_callback gAudioErrorCallback;
static int gOutSamplingRate[NUM_AUDIO_OUTPUT_TYPES];
static int gOutFrameCount[NUM_AUDIO_OUTPUT_TYPES];
static uint32_t gOutLatency[NUM_AUDIO_OUTPUT_TYPES];
static bool gA2dpEnabled;
static size_t gInBuffSize;
// previous parameters for recording buffer size queries
static uint32_t gPrevInSamplingRate;
static int gPrevInFormat;
static int gPrevInChannelCount;
};
}; // namespace android
#endif /*ANDROID_AUDIOSYSTEM_H_*/
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