1 /* 2 * Copyright (C) 2007 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 ANDROID_IAUDIOFLINGER_H 18 #define ANDROID_IAUDIOFLINGER_H 19 20 #include <stdint.h> 21 #include <sys/types.h> 22 #include <unistd.h> 23 24 #include <utils/RefBase.h> 25 #include <utils/Errors.h> 26 #include <binder/IInterface.h> 27 #include <media/IAudioTrack.h> 28 #include <media/IAudioRecord.h> 29 #include <media/IAudioFlingerClient.h> 30 #include <utils/String8.h> 31 32 namespace android { 33 34 // ---------------------------------------------------------------------------- 35 36 class IAudioFlinger : public IInterface 37 { 38 public: 39 DECLARE_META_INTERFACE(AudioFlinger); 40 41 /* create an audio track and registers it with AudioFlinger. 42 * return null if the track cannot be created. 43 */ 44 virtual sp<IAudioTrack> createTrack( 45 pid_t pid, 46 int streamType, 47 uint32_t sampleRate, 48 int format, 49 int channelCount, 50 int frameCount, 51 uint32_t flags, 52 const sp<IMemory>& sharedBuffer, 53 int output, 54 status_t *status) = 0; 55 56 virtual sp<IAudioRecord> openRecord( 57 pid_t pid, 58 int input, 59 uint32_t sampleRate, 60 int format, 61 int channelCount, 62 int frameCount, 63 uint32_t flags, 64 status_t *status) = 0; 65 66 /* query the audio hardware state. This state never changes, 67 * and therefore can be cached. 68 */ 69 virtual uint32_t sampleRate(int output) const = 0; 70 virtual int channelCount(int output) const = 0; 71 virtual int format(int output) const = 0; 72 virtual size_t frameCount(int output) const = 0; 73 virtual uint32_t latency(int output) const = 0; 74 75 /* set/get the audio hardware state. This will probably be used by 76 * the preference panel, mostly. 77 */ 78 virtual status_t setMasterVolume(float value) = 0; 79 virtual status_t setMasterMute(bool muted) = 0; 80 81 virtual float masterVolume() const = 0; 82 virtual bool masterMute() const = 0; 83 84 /* set/get stream type state. This will probably be used by 85 * the preference panel, mostly. 86 */ 87 virtual status_t setStreamVolume(int stream, float value, int output) = 0; 88 virtual status_t setStreamMute(int stream, bool muted) = 0; 89 90 virtual float streamVolume(int stream, int output) const = 0; 91 virtual bool streamMute(int stream) const = 0; 92 93 // set audio mode 94 virtual status_t setMode(int mode) = 0; 95 96 // mic mute/state 97 virtual status_t setMicMute(bool state) = 0; 98 virtual bool getMicMute() const = 0; 99 100 // is a music stream active? 101 virtual bool isMusicActive() const = 0; 102 103 virtual status_t setParameters(int ioHandle, const String8& keyValuePairs) = 0; 104 virtual String8 getParameters(int ioHandle, const String8& keys) = 0; 105 106 // register a current process for audio output change notifications 107 virtual void registerClient(const sp<IAudioFlingerClient>& client) = 0; 108 109 // retrieve the audio recording buffer size 110 virtual size_t getInputBufferSize(uint32_t sampleRate, int format, int channelCount) = 0; 111 112 virtual int openOutput(uint32_t *pDevices, 113 uint32_t *pSamplingRate, 114 uint32_t *pFormat, 115 uint32_t *pChannels, 116 uint32_t *pLatencyMs, 117 uint32_t flags) = 0; 118 virtual int openDuplicateOutput(int output1, int output2) = 0; 119 virtual status_t closeOutput(int output) = 0; 120 virtual status_t suspendOutput(int output) = 0; 121 virtual status_t restoreOutput(int output) = 0; 122 123 virtual int openInput(uint32_t *pDevices, 124 uint32_t *pSamplingRate, 125 uint32_t *pFormat, 126 uint32_t *pChannels, 127 uint32_t acoustics) = 0; 128 virtual status_t closeInput(int input) = 0; 129 130 virtual status_t setStreamOutput(uint32_t stream, int output) = 0; 131 132 virtual status_t setVoiceVolume(float volume) = 0; 133 }; 134 135 136 // ---------------------------------------------------------------------------- 137 138 class BnAudioFlinger : public BnInterface<IAudioFlinger> 139 { 140 public: 141 virtual status_t onTransact( uint32_t code, 142 const Parcel& data, 143 Parcel* reply, 144 uint32_t flags = 0); 145 }; 146 147 // ---------------------------------------------------------------------------- 148 149 }; // namespace android 150 151 #endif // ANDROID_IAUDIOFLINGER_H 152