IAudioFlinger.h revision 688aac7675f18bdd7bff13334759e20bc4e6c390
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 <system/audio.h> 31#include <hardware/audio_effect.h> 32#include <media/IEffect.h> 33#include <media/IEffectClient.h> 34#include <utils/String8.h> 35 36namespace android { 37 38// ---------------------------------------------------------------------------- 39 40class IAudioFlinger : public IInterface 41{ 42public: 43 DECLARE_META_INTERFACE(AudioFlinger); 44 45 /* create an audio track and registers it with AudioFlinger. 46 * return null if the track cannot be created. 47 */ 48 virtual sp<IAudioTrack> createTrack( 49 pid_t pid, 50 audio_stream_type_t streamType, 51 uint32_t sampleRate, 52 audio_format_t format, 53 uint32_t channelMask, 54 int frameCount, 55 uint32_t flags, 56 const sp<IMemory>& sharedBuffer, 57 audio_io_handle_t output, 58 bool isTimed, 59 int *sessionId, 60 status_t *status) = 0; 61 62 virtual sp<IAudioRecord> openRecord( 63 pid_t pid, 64 audio_io_handle_t input, 65 uint32_t sampleRate, 66 audio_format_t format, 67 uint32_t channelMask, 68 int frameCount, 69 uint32_t flags, 70 int *sessionId, 71 status_t *status) = 0; 72 73 /* query the audio hardware state. This state never changes, 74 * and therefore can be cached. 75 */ 76 virtual uint32_t sampleRate(audio_io_handle_t output) const = 0; 77 virtual int channelCount(audio_io_handle_t output) const = 0; 78 virtual audio_format_t format(audio_io_handle_t output) const = 0; 79 virtual size_t frameCount(audio_io_handle_t output) const = 0; 80 81 // return estimated latency in milliseconds 82 virtual uint32_t latency(audio_io_handle_t output) const = 0; 83 84 /* set/get the audio hardware state. This will probably be used by 85 * the preference panel, mostly. 86 */ 87 virtual status_t setMasterVolume(float value) = 0; 88 virtual status_t setMasterMute(bool muted) = 0; 89 90 virtual float masterVolume() const = 0; 91 virtual bool masterMute() const = 0; 92 93 /* set/get stream type state. This will probably be used by 94 * the preference panel, mostly. 95 */ 96 virtual status_t setStreamVolume(audio_stream_type_t stream, float value, 97 audio_io_handle_t output) = 0; 98 virtual status_t setStreamMute(audio_stream_type_t stream, bool muted) = 0; 99 100 virtual float streamVolume(audio_stream_type_t stream, 101 audio_io_handle_t output) const = 0; 102 virtual bool streamMute(audio_stream_type_t stream) const = 0; 103 104 // set audio mode 105 virtual status_t setMode(audio_mode_t mode) = 0; 106 107 // mic mute/state 108 virtual status_t setMicMute(bool state) = 0; 109 virtual bool getMicMute() const = 0; 110 111 virtual status_t setParameters(audio_io_handle_t ioHandle, 112 const String8& keyValuePairs) = 0; 113 virtual String8 getParameters(audio_io_handle_t ioHandle, const String8& keys) const = 0; 114 115 // register a current process for audio output change notifications 116 virtual void registerClient(const sp<IAudioFlingerClient>& client) = 0; 117 118 // retrieve the audio recording buffer size 119 virtual size_t getInputBufferSize(uint32_t sampleRate, audio_format_t format, int channelCount) const = 0; 120 121 virtual audio_io_handle_t openOutput(uint32_t *pDevices, 122 uint32_t *pSamplingRate, 123 audio_format_t *pFormat, 124 uint32_t *pChannels, 125 uint32_t *pLatencyMs, 126 uint32_t flags) = 0; 127 virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1, 128 audio_io_handle_t output2) = 0; 129 virtual status_t closeOutput(audio_io_handle_t output) = 0; 130 virtual status_t suspendOutput(audio_io_handle_t output) = 0; 131 virtual status_t restoreOutput(audio_io_handle_t output) = 0; 132 133 virtual audio_io_handle_t openInput(uint32_t *pDevices, 134 uint32_t *pSamplingRate, 135 audio_format_t *pFormat, 136 uint32_t *pChannels, 137 audio_in_acoustics_t acoustics) = 0; 138 virtual status_t closeInput(audio_io_handle_t input) = 0; 139 140 virtual status_t setStreamOutput(audio_stream_type_t stream, audio_io_handle_t output) = 0; 141 142 virtual status_t setVoiceVolume(float volume) = 0; 143 144 virtual status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, 145 audio_io_handle_t output) const = 0; 146 147 virtual unsigned int getInputFramesLost(audio_io_handle_t ioHandle) const = 0; 148 149 virtual int newAudioSessionId() = 0; 150 151 virtual void acquireAudioSessionId(int audioSession) = 0; 152 virtual void releaseAudioSessionId(int audioSession) = 0; 153 154 virtual status_t queryNumberEffects(uint32_t *numEffects) const = 0; 155 156 virtual status_t queryEffect(uint32_t index, effect_descriptor_t *pDescriptor) const = 0; 157 158 virtual status_t getEffectDescriptor(const effect_uuid_t *pEffectUUID, 159 effect_descriptor_t *pDescriptor) const = 0; 160 161 virtual sp<IEffect> createEffect(pid_t pid, 162 effect_descriptor_t *pDesc, 163 const sp<IEffectClient>& client, 164 int32_t priority, 165 audio_io_handle_t output, 166 int sessionId, 167 status_t *status, 168 int *id, 169 int *enabled) = 0; 170 171 virtual status_t moveEffects(int session, audio_io_handle_t srcOutput, 172 audio_io_handle_t dstOutput) = 0; 173}; 174 175 176// ---------------------------------------------------------------------------- 177 178class BnAudioFlinger : public BnInterface<IAudioFlinger> 179{ 180public: 181 virtual status_t onTransact( uint32_t code, 182 const Parcel& data, 183 Parcel* reply, 184 uint32_t flags = 0); 185}; 186 187// ---------------------------------------------------------------------------- 188 189}; // namespace android 190 191#endif // ANDROID_IAUDIOFLINGER_H 192