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 audio_stream_type_t streamType, 60 uint32_t sampleRate, 61 audio_format_t format, 62 audio_channel_mask_t channelMask, 63 size_t frameCount, 64 track_flags_t *flags, 65 const sp<IMemory>& sharedBuffer, 66 audio_io_handle_t output, 67 pid_t tid, // -1 means unused, otherwise must be valid non-0 68 int *sessionId, 69 status_t *status) = 0; 70 71 virtual sp<IAudioRecord> openRecord( 72 audio_io_handle_t input, 73 uint32_t sampleRate, 74 audio_format_t format, 75 audio_channel_mask_t channelMask, 76 size_t frameCount, 77 track_flags_t flags, 78 pid_t tid, // -1 means unused, otherwise must be valid non-0 79 int *sessionId, 80 status_t *status) = 0; 81 82 /* query the audio hardware state. This state never changes, 83 * and therefore can be cached. 84 */ 85 virtual uint32_t sampleRate(audio_io_handle_t output) const = 0; 86 #if 0 87 virtual int channelCount(audio_io_handle_t output) const = 0; 88 #endif 89 virtual audio_format_t format(audio_io_handle_t output) const = 0; 90 virtual size_t frameCount(audio_io_handle_t output) const = 0; 91 92 // return estimated latency in milliseconds 93 virtual uint32_t latency(audio_io_handle_t output) const = 0; 94 95 /* set/get the audio hardware state. This will probably be used by 96 * the preference panel, mostly. 97 */ 98 virtual status_t setMasterVolume(float value) = 0; 99 virtual status_t setMasterMute(bool muted) = 0; 100 101 virtual float masterVolume() const = 0; 102 virtual bool masterMute() const = 0; 103 104 /* set/get stream type state. This will probably be used by 105 * the preference panel, mostly. 106 */ 107 virtual status_t setStreamVolume(audio_stream_type_t stream, float value, 108 audio_io_handle_t output) = 0; 109 virtual status_t setStreamMute(audio_stream_type_t stream, bool muted) = 0; 110 111 virtual float streamVolume(audio_stream_type_t stream, 112 audio_io_handle_t output) const = 0; 113 virtual bool streamMute(audio_stream_type_t stream) const = 0; 114 115 // set audio mode 116 virtual status_t setMode(audio_mode_t mode) = 0; 117 118 // mic mute/state 119 virtual status_t setMicMute(bool state) = 0; 120 virtual bool getMicMute() const = 0; 121 122 virtual status_t setParameters(audio_io_handle_t ioHandle, 123 const String8& keyValuePairs) = 0; 124 virtual String8 getParameters(audio_io_handle_t ioHandle, const String8& keys) 125 const = 0; 126 127 // register a current process for audio output change notifications 128 virtual void registerClient(const sp<IAudioFlingerClient>& client) = 0; 129 130 // retrieve the audio recording buffer size 131 virtual size_t getInputBufferSize(uint32_t sampleRate, audio_format_t format, 132 audio_channel_mask_t channelMask) const = 0; 133 134 virtual audio_io_handle_t openOutput(audio_module_handle_t module, 135 audio_devices_t *pDevices, 136 uint32_t *pSamplingRate, 137 audio_format_t *pFormat, 138 audio_channel_mask_t *pChannelMask, 139 uint32_t *pLatencyMs, 140 audio_output_flags_t flags) = 0; 141 virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1, 142 audio_io_handle_t output2) = 0; 143 virtual status_t closeOutput(audio_io_handle_t output) = 0; 144 virtual status_t suspendOutput(audio_io_handle_t output) = 0; 145 virtual status_t restoreOutput(audio_io_handle_t output) = 0; 146 147 virtual audio_io_handle_t openInput(audio_module_handle_t module, 148 audio_devices_t *pDevices, 149 uint32_t *pSamplingRate, 150 audio_format_t *pFormat, 151 audio_channel_mask_t *pChannelMask) = 0; 152 virtual status_t closeInput(audio_io_handle_t input) = 0; 153 154 virtual status_t setStreamOutput(audio_stream_type_t stream, audio_io_handle_t output) = 0; 155 156 virtual status_t setVoiceVolume(float volume) = 0; 157 158 virtual status_t getRenderPosition(size_t *halFrames, size_t *dspFrames, 159 audio_io_handle_t output) const = 0; 160 161 virtual size_t getInputFramesLost(audio_io_handle_t ioHandle) const = 0; 162 163 virtual int newAudioSessionId() = 0; 164 165 virtual void acquireAudioSessionId(int audioSession) = 0; 166 virtual void releaseAudioSessionId(int audioSession) = 0; 167 168 virtual status_t queryNumberEffects(uint32_t *numEffects) const = 0; 169 170 virtual status_t queryEffect(uint32_t index, effect_descriptor_t *pDescriptor) const = 0; 171 172 virtual status_t getEffectDescriptor(const effect_uuid_t *pEffectUUID, 173 effect_descriptor_t *pDescriptor) const = 0; 174 175 virtual sp<IEffect> createEffect( 176 effect_descriptor_t *pDesc, 177 const sp<IEffectClient>& client, 178 int32_t priority, 179 audio_io_handle_t output, 180 int sessionId, 181 status_t *status, 182 int *id, 183 int *enabled) = 0; 184 185 virtual status_t moveEffects(int session, audio_io_handle_t srcOutput, 186 audio_io_handle_t dstOutput) = 0; 187 188 virtual audio_module_handle_t loadHwModule(const char *name) = 0; 189 190 // helpers for android.media.AudioManager.getProperty(), see description there for meaning 191 // FIXME move these APIs to AudioPolicy to permit a more accurate implementation 192 // that looks on primary device for a stream with fast flag, primary flag, or first one. 193 virtual uint32_t getPrimaryOutputSamplingRate() = 0; 194 virtual size_t getPrimaryOutputFrameCount() = 0; 195 196 }; 197 198 199 // ---------------------------------------------------------------------------- 200 201 class BnAudioFlinger : public BnInterface<IAudioFlinger> 202 { 203 public: 204 virtual status_t onTransact( uint32_t code, 205 const Parcel& data, 206 Parcel* reply, 207 uint32_t flags = 0); 208 }; 209 210 // ---------------------------------------------------------------------------- 211 212 }; // namespace android 213 214 #endif // ANDROID_IAUDIOFLINGER_H 215
