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_policy.h> 33 #include <hardware/audio_effect.h> 34 #include <media/IEffect.h> 35 #include <media/IEffectClient.h> 36 #include <utils/String8.h> 37 38 namespace android { 39 40 // ---------------------------------------------------------------------------- 41 42 class IAudioFlinger : public IInterface 43 { 44 public: 45 DECLARE_META_INTERFACE(AudioFlinger); 46 47 // or-able bits shared by createTrack and openRecord, but not all combinations make sense 48 enum { 49 TRACK_DEFAULT = 0, // client requests a default AudioTrack 50 TRACK_TIMED = 1, // client requests a TimedAudioTrack 51 TRACK_FAST = 2, // client requests a fast AudioTrack or AudioRecord 52 }; 53 typedef uint32_t track_flags_t; 54 55 /* create an audio track and registers it with AudioFlinger. 56 * return null if the track cannot be created. 57 */ 58 virtual sp<IAudioTrack> createTrack( 59 pid_t pid, 60 audio_stream_type_t streamType, 61 uint32_t sampleRate, 62 audio_format_t format, 63 audio_channel_mask_t channelMask, 64 int frameCount, 65 track_flags_t flags, 66 const sp<IMemory>& sharedBuffer, 67 audio_io_handle_t output, 68 pid_t tid, // -1 means unused, otherwise must be valid non-0 69 int *sessionId, 70 status_t *status) = 0; 71 72 virtual sp<IAudioRecord> openRecord( 73 pid_t pid, 74 audio_io_handle_t input, 75 uint32_t sampleRate, 76 audio_format_t format, 77 audio_channel_mask_t channelMask, 78 int frameCount, 79 track_flags_t flags, 80 pid_t tid, // -1 means unused, otherwise must be valid non-0 81 int *sessionId, 82 status_t *status) = 0; 83 84 /* query the audio hardware state. This state never changes, 85 * and therefore can be cached. 86 */ 87 virtual uint32_t sampleRate(audio_io_handle_t output) const = 0; 88 #if 0 89 virtual int channelCount(audio_io_handle_t output) const = 0; 90 #endif 91 virtual audio_format_t format(audio_io_handle_t output) const = 0; 92 virtual size_t frameCount(audio_io_handle_t output) const = 0; 93 94 // return estimated latency in milliseconds 95 virtual uint32_t latency(audio_io_handle_t output) const = 0; 96 97 /* set/get the audio hardware state. This will probably be used by 98 * the preference panel, mostly. 99 */ 100 virtual status_t setMasterVolume(float value) = 0; 101 virtual status_t setMasterMute(bool muted) = 0; 102 103 virtual float masterVolume() const = 0; 104 virtual bool masterMute() const = 0; 105 106 /* set/get stream type state. This will probably be used by 107 * the preference panel, mostly. 108 */ 109 virtual status_t setStreamVolume(audio_stream_type_t stream, float value, 110 audio_io_handle_t output) = 0; 111 virtual status_t setStreamMute(audio_stream_type_t stream, bool muted) = 0; 112 113 virtual float streamVolume(audio_stream_type_t stream, 114 audio_io_handle_t output) const = 0; 115 virtual bool streamMute(audio_stream_type_t stream) const = 0; 116 117 // set audio mode 118 virtual status_t setMode(audio_mode_t mode) = 0; 119 120 // mic mute/state 121 virtual status_t setMicMute(bool state) = 0; 122 virtual bool getMicMute() const = 0; 123 124 virtual status_t setParameters(audio_io_handle_t ioHandle, 125 const String8& keyValuePairs) = 0; 126 virtual String8 getParameters(audio_io_handle_t ioHandle, const String8& keys) const = 0; 127 128 // register a current process for audio output change notifications 129 virtual void registerClient(const sp<IAudioFlingerClient>& client) = 0; 130 131 // retrieve the audio recording buffer size 132 virtual size_t getInputBufferSize(uint32_t sampleRate, audio_format_t format, 133 audio_channel_mask_t channelMask) const = 0; 134 135 virtual audio_io_handle_t openOutput(audio_module_handle_t module, 136 audio_devices_t *pDevices, 137 uint32_t *pSamplingRate, 138 audio_format_t *pFormat, 139 audio_channel_mask_t *pChannelMask, 140 uint32_t *pLatencyMs, 141 audio_output_flags_t flags) = 0; 142 virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1, 143 audio_io_handle_t output2) = 0; 144 virtual status_t closeOutput(audio_io_handle_t output) = 0; 145 virtual status_t suspendOutput(audio_io_handle_t output) = 0; 146 virtual status_t restoreOutput(audio_io_handle_t output) = 0; 147 148 virtual audio_io_handle_t openInput(audio_module_handle_t module, 149 audio_devices_t *pDevices, 150 uint32_t *pSamplingRate, 151 audio_format_t *pFormat, 152 audio_channel_mask_t *pChannelMask) = 0; 153 virtual status_t closeInput(audio_io_handle_t input) = 0; 154 155 virtual status_t setStreamOutput(audio_stream_type_t stream, audio_io_handle_t output) = 0; 156 157 virtual status_t setVoiceVolume(float volume) = 0; 158 159 virtual status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, 160 audio_io_handle_t output) const = 0; 161 162 virtual unsigned int getInputFramesLost(audio_io_handle_t ioHandle) const = 0; 163 164 virtual int newAudioSessionId() = 0; 165 166 virtual void acquireAudioSessionId(int audioSession) = 0; 167 virtual void releaseAudioSessionId(int audioSession) = 0; 168 169 virtual status_t queryNumberEffects(uint32_t *numEffects) const = 0; 170 171 virtual status_t queryEffect(uint32_t index, effect_descriptor_t *pDescriptor) const = 0; 172 173 virtual status_t getEffectDescriptor(const effect_uuid_t *pEffectUUID, 174 effect_descriptor_t *pDescriptor) const = 0; 175 176 virtual sp<IEffect> createEffect(pid_t pid, 177 effect_descriptor_t *pDesc, 178 const sp<IEffectClient>& client, 179 int32_t priority, 180 audio_io_handle_t output, 181 int sessionId, 182 status_t *status, 183 int *id, 184 int *enabled) = 0; 185 186 virtual status_t moveEffects(int session, audio_io_handle_t srcOutput, 187 audio_io_handle_t dstOutput) = 0; 188 189 virtual audio_module_handle_t loadHwModule(const char *name) = 0; 190 191 // helpers for android.media.AudioManager.getProperty(), see description there for meaning 192 // FIXME move these APIs to AudioPolicy to permit a more accurate implementation 193 // that looks on primary device for a stream with fast flag, primary flag, or first one. 194 virtual int32_t getPrimaryOutputSamplingRate() = 0; 195 virtual int32_t getPrimaryOutputFrameCount() = 0; 196 197 }; 198 199 200 // ---------------------------------------------------------------------------- 201 202 class BnAudioFlinger : public BnInterface<IAudioFlinger> 203 { 204 public: 205 virtual status_t onTransact( uint32_t code, 206 const Parcel& data, 207 Parcel* reply, 208 uint32_t flags = 0); 209 }; 210 211 // ---------------------------------------------------------------------------- 212 213 }; // namespace android 214 215 #endif // ANDROID_IAUDIOFLINGER_H 216
