/* * 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 A2DP_AUDIO_HARDWARE_H #define A2DP_AUDIO_HARDWARE_H #include <stdint.h> #include <sys/types.h> #include <utils/threads.h> #include <hardware_legacy/AudioHardwareBase.h> namespace android { class A2dpAudioInterface : public AudioHardwareBase { class A2dpAudioStreamOut; public: A2dpAudioInterface(); virtual ~A2dpAudioInterface(); virtual status_t initCheck(); virtual status_t setVoiceVolume(float volume); virtual status_t setMasterVolume(float volume); // mic mute virtual status_t setMicMute(bool state); virtual status_t getMicMute(bool* state); // Temporary interface, do not use // TODO: Replace with a more generic key:value get/set mechanism virtual status_t setParameter(const char *key, const char *value); // create I/O streams virtual AudioStreamOut* openOutputStream( int format=0, int channelCount=0, uint32_t sampleRate=0, status_t *status=0); virtual AudioStreamIn* openInputStream( int inputSource, int format, int channelCount, uint32_t sampleRate, status_t *status, AudioSystem::audio_in_acoustics acoustics); protected: virtual status_t doRouting(); virtual status_t dump(int fd, const Vector<String16>& args); private: class A2dpAudioStreamOut : public AudioStreamOut { public: A2dpAudioStreamOut(); virtual ~A2dpAudioStreamOut(); status_t set(int format, int channelCount, uint32_t sampleRate); virtual uint32_t sampleRate() const { return 44100; } // SBC codec wants a multiple of 512 virtual size_t bufferSize() const { return 512 * 20; } virtual int channelCount() const { return 2; } virtual int format() const { return AudioSystem::PCM_16_BIT; } virtual uint32_t latency() const { return ((1000*bufferSize())/frameSize())/sampleRate() + 200; } virtual status_t setVolume(float volume) { return INVALID_OPERATION; } virtual ssize_t write(const void* buffer, size_t bytes); status_t standby(); virtual status_t dump(int fd, const Vector<String16>& args); private: friend class A2dpAudioInterface; status_t init(); status_t close(); status_t close_l(); status_t setAddress(const char* address); status_t setBluetoothEnabled(bool enabled); private: int mFd; bool mStandby; int mStartCount; int mRetryCount; char mA2dpAddress[20]; void* mData; Mutex mLock; bool mBluetoothEnabled; }; A2dpAudioStreamOut* mOutput; }; // ---------------------------------------------------------------------------- }; // namespace android #endif // A2DP_AUDIO_HARDWARE_H