diff options
Diffstat (limited to 'include/media/AudioSystem.h')
| -rw-r--r-- | include/media/AudioSystem.h | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h new file mode 100644 index 00000000..77c90ba7 --- /dev/null +++ b/include/media/AudioSystem.h @@ -0,0 +1,177 @@ +/* + * 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, + 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_*/ |