IAudioFlinger.h revision cc1110dc92e53e9cc0afbb043e6ef8295bd9c5d5
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 <system/audio_policy.h> 32#include <hardware/audio_effect.h> 33#include <media/IEffect.h> 34#include <media/IEffectClient.h> 35#include <utils/String8.h> 36 37namespace android { 38 39// ---------------------------------------------------------------------------- 40 41class IAudioFlinger : public IInterface 42{ 43public: 44 DECLARE_META_INTERFACE(AudioFlinger); 45 46 // or-able bits shared by createTrack and openRecord, but not all combinations make sense 47 enum { 48 TRACK_DEFAULT = 0, // client requests a default AudioTrack 49 TRACK_TIMED = 1, // client requests a TimedAudioTrack 50 TRACK_FAST = 2, // client requests a fast AudioTrack 51 }; 52 typedef uint32_t track_flags_t; 53 54 /* create an audio track and registers it with AudioFlinger. 55 * return null if the track cannot be created. 56 */ 57 virtual sp<IAudioTrack> createTrack( 58 pid_t pid, 59 audio_stream_type_t streamType, 60 uint32_t sampleRate, 61 audio_format_t format, 62 uint32_t channelMask, 63 int frameCount, 64 track_flags_t flags, 65 const sp<IMemory>& sharedBuffer, 66 audio_io_handle_t output, 67 int *sessionId, 68 status_t *status) = 0; 69 70 virtual sp<IAudioRecord> openRecord( 71 pid_t pid, 72 audio_io_handle_t input, 73 uint32_t sampleRate, 74 audio_format_t format, 75 uint32_t channelMask, 76 int frameCount, 77 track_flags_t flags, 78 int *sessionId, 79 status_t *status) = 0; 80 81 /* query the audio hardware state. This state never changes, 82 * and therefore can be cached. 83 */ 84 virtual uint32_t sampleRate(audio_io_handle_t output) const = 0; 85 virtual int channelCount(audio_io_handle_t output) const = 0; 86 virtual audio_format_t format(audio_io_handle_t output) const = 0; 87 virtual size_t frameCount(audio_io_handle_t output) const = 0; 88 89 // return estimated latency in milliseconds 90 virtual uint32_t latency(audio_io_handle_t output) const = 0; 91 92 /* set/get the audio hardware state. This will probably be used by 93 * the preference panel, mostly. 94 */ 95 virtual status_t setMasterVolume(float value) = 0; 96 virtual status_t setMasterMute(bool muted) = 0; 97 98 virtual float masterVolume() const = 0; 99 virtual bool masterMute() const = 0; 100 101 /* set/get stream type state. This will probably be used by 102 * the preference panel, mostly. 103 */ 104 virtual status_t setStreamVolume(audio_stream_type_t stream, float value, 105 audio_io_handle_t output) = 0; 106 virtual status_t setStreamMute(audio_stream_type_t stream, bool muted) = 0; 107 108 virtual float streamVolume(audio_stream_type_t stream, 109 audio_io_handle_t output) const = 0; 110 virtual bool streamMute(audio_stream_type_t stream) const = 0; 111 112 // set audio mode 113 virtual status_t setMode(audio_mode_t mode) = 0; 114 115 // mic mute/state 116 virtual status_t setMicMute(bool state) = 0; 117 virtual bool getMicMute() const = 0; 118 119 virtual status_t setParameters(audio_io_handle_t ioHandle, 120 const String8& keyValuePairs) = 0; 121 virtual String8 getParameters(audio_io_handle_t ioHandle, const String8& keys) const = 0; 122 123 // register a current process for audio output change notifications 124 virtual void registerClient(const sp<IAudioFlingerClient>& client) = 0; 125 126 // retrieve the audio recording buffer size 127 virtual size_t getInputBufferSize(uint32_t sampleRate, audio_format_t format, int channelCount) const = 0; 128 129 virtual audio_io_handle_t openOutput(uint32_t *pDevices, 130 uint32_t *pSamplingRate, 131 audio_format_t *pFormat, 132 uint32_t *pChannels, 133 uint32_t *pLatencyMs, 134 audio_policy_output_flags_t flags) = 0; 135 virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1, 136 audio_io_handle_t output2) = 0; 137 virtual status_t closeOutput(audio_io_handle_t output) = 0; 138 virtual status_t suspendOutput(audio_io_handle_t output) = 0; 139 virtual status_t restoreOutput(audio_io_handle_t output) = 0; 140 141 virtual audio_io_handle_t openInput(uint32_t *pDevices, 142 uint32_t *pSamplingRate, 143 audio_format_t *pFormat, 144 uint32_t *pChannels, 145 audio_in_acoustics_t acoustics) = 0; 146 virtual status_t closeInput(audio_io_handle_t input) = 0; 147 148 virtual status_t setStreamOutput(audio_stream_type_t stream, audio_io_handle_t output) = 0; 149 150 virtual status_t setVoiceVolume(float volume) = 0; 151 152 virtual status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, 153 audio_io_handle_t output) const = 0; 154 155 virtual unsigned int getInputFramesLost(audio_io_handle_t ioHandle) const = 0; 156 157 virtual int newAudioSessionId() = 0; 158 159 virtual void acquireAudioSessionId(int audioSession) = 0; 160 virtual void releaseAudioSessionId(int audioSession) = 0; 161 162 virtual status_t queryNumberEffects(uint32_t *numEffects) const = 0; 163 164 virtual status_t queryEffect(uint32_t index, effect_descriptor_t *pDescriptor) const = 0; 165 166 virtual status_t getEffectDescriptor(const effect_uuid_t *pEffectUUID, 167 effect_descriptor_t *pDescriptor) const = 0; 168 169 virtual sp<IEffect> createEffect(pid_t pid, 170 effect_descriptor_t *pDesc, 171 const sp<IEffectClient>& client, 172 int32_t priority, 173 audio_io_handle_t output, 174 int sessionId, 175 status_t *status, 176 int *id, 177 int *enabled) = 0; 178 179 virtual status_t moveEffects(int session, audio_io_handle_t srcOutput, 180 audio_io_handle_t dstOutput) = 0; 181}; 182 183 184// ---------------------------------------------------------------------------- 185 186class BnAudioFlinger : public BnInterface<IAudioFlinger> 187{ 188public: 189 virtual status_t onTransact( uint32_t code, 190 const Parcel& data, 191 Parcel* reply, 192 uint32_t flags = 0); 193}; 194 195// ---------------------------------------------------------------------------- 196 197}; // namespace android 198 199#endif // ANDROID_IAUDIOFLINGER_H 200