1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef A2DP_AUDIO_HARDWARE_H 18 #define A2DP_AUDIO_HARDWARE_H 19 20 #include <stdint.h> 21 #include <sys/types.h> 22 23 #include <utils/threads.h> 24 25 #include <hardware_legacy/AudioHardwareBase.h> 26 27 28 namespace android_audio_legacy { 29 using android::Mutex; 30 31 class A2dpAudioInterface : public AudioHardwareBase 32 { 33 class A2dpAudioStreamOut; 34 35 public: 36 A2dpAudioInterface(AudioHardwareInterface* hw); 37 virtual ~A2dpAudioInterface(); 38 virtual status_t initCheck(); 39 40 virtual status_t setVoiceVolume(float volume); 41 virtual status_t setMasterVolume(float volume); 42 43 virtual status_t setMode(int mode); 44 45 // mic mute 46 virtual status_t setMicMute(bool state); 47 virtual status_t getMicMute(bool* state); 48 49 virtual status_t setParameters(const String8& keyValuePairs); 50 virtual String8 getParameters(const String8& keys); 51 52 virtual size_t getInputBufferSize(uint32_t sampleRate, int format, int channelCount); 53 54 // create I/O streams 55 virtual AudioStreamOut* openOutputStream( 56 uint32_t devices, 57 int *format=0, 58 uint32_t *channels=0, 59 uint32_t *sampleRate=0, 60 status_t *status=0); 61 virtual void closeOutputStream(AudioStreamOut* out); 62 63 virtual AudioStreamIn* openInputStream( 64 uint32_t devices, 65 int *format, 66 uint32_t *channels, 67 uint32_t *sampleRate, 68 status_t *status, 69 AudioSystem::audio_in_acoustics acoustics); 70 virtual void closeInputStream(AudioStreamIn* in); 71 // static AudioHardwareInterface* createA2dpInterface(); 72 73 protected: 74 virtual status_t dump(int fd, const Vector<String16>& args); 75 76 private: 77 class A2dpAudioStreamOut : public AudioStreamOut { 78 public: 79 A2dpAudioStreamOut(); 80 virtual ~A2dpAudioStreamOut(); 81 status_t set(uint32_t device, 82 int *pFormat, 83 uint32_t *pChannels, 84 uint32_t *pRate); 85 virtual uint32_t sampleRate() const { return 44100; } 86 // SBC codec wants a multiple of 512 87 virtual size_t bufferSize() const { return 512 * 20; } 88 virtual uint32_t channels() const { return AudioSystem::CHANNEL_OUT_STEREO; } 89 virtual int format() const { return AudioSystem::PCM_16_BIT; } 90 virtual uint32_t latency() const { return ((1000*bufferSize())/frameSize())/sampleRate() + 200; } 91 virtual status_t setVolume(float left, float right) { return INVALID_OPERATION; } 92 virtual ssize_t write(const void* buffer, size_t bytes); 93 status_t standby(); 94 virtual status_t dump(int fd, const Vector<String16>& args); 95 virtual status_t setParameters(const String8& keyValuePairs); 96 virtual String8 getParameters(const String8& keys); 97 virtual status_t getRenderPosition(uint32_t *dspFrames); 98 99 private: 100 friend class A2dpAudioInterface; 101 status_t init(); 102 status_t close(); 103 status_t close_l(); 104 status_t setAddress(const char* address); 105 status_t setBluetoothEnabled(bool enabled); 106 status_t setSuspended(bool onOff); 107 status_t standby_l(); 108 109 private: 110 int mFd; 111 bool mStandby; 112 int mStartCount; 113 int mRetryCount; 114 char mA2dpAddress[20]; 115 void* mData; 116 Mutex mLock; 117 bool mBluetoothEnabled; 118 uint32_t mDevice; 119 bool mClosing; 120 bool mSuspended; 121 nsecs_t mLastWriteTime; 122 uint32_t mBufferDurationUs; 123 }; 124 125 friend class A2dpAudioStreamOut; 126 127 A2dpAudioStreamOut* mOutput; 128 AudioHardwareInterface *mHardwareInterface; 129 char mA2dpAddress[20]; 130 bool mBluetoothEnabled; 131 bool mSuspended; 132 }; 133 134 135 // ---------------------------------------------------------------------------- 136 137 }; // namespace android 138 139 #endif // A2DP_AUDIO_HARDWARE_H 140
