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 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 uint32_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 uint32_t channelMask, 78 int frameCount, 79 track_flags_t flags, 80 int *sessionId, 81 status_t *status) = 0; 82 83 /* query the audio hardware state. This state never changes, 84 * and therefore can be cached. 85 */ 86 virtual uint32_t sampleRate(audio_io_handle_t output) const = 0; 87 virtual int channelCount(audio_io_handle_t output) const = 0; 88 virtual audio_format_t format(audio_io_handle_t output) const = 0; 89 virtual size_t frameCount(audio_io_handle_t output) const = 0; 90 91 // return estimated latency in milliseconds 92 virtual uint32_t latency(audio_io_handle_t output) const = 0; 93 94 /* set/get the audio hardware state. This will probably be used by 95 * the preference panel, mostly. 96 */ 97 virtual status_t setMasterVolume(float value) = 0; 98 virtual status_t setMasterMute(bool muted) = 0; 99 100 virtual float masterVolume() const = 0; 101 virtual bool masterMute() const = 0; 102 103 /* set/get stream type state. This will probably be used by 104 * the preference panel, mostly. 105 */ 106 virtual status_t setStreamVolume(audio_stream_type_t stream, float value, 107 audio_io_handle_t output) = 0; 108 virtual status_t setStreamMute(audio_stream_type_t stream, bool muted) = 0; 109 110 virtual float streamVolume(audio_stream_type_t stream, 111 audio_io_handle_t output) const = 0; 112 virtual bool streamMute(audio_stream_type_t stream) const = 0; 113 114 // set audio mode 115 virtual status_t setMode(audio_mode_t mode) = 0; 116 117 // mic mute/state 118 virtual status_t setMicMute(bool state) = 0; 119 virtual bool getMicMute() const = 0; 120 121 virtual status_t setParameters(audio_io_handle_t ioHandle, 122 const String8& keyValuePairs) = 0; 123 virtual String8 getParameters(audio_io_handle_t ioHandle, const String8& keys) const = 0; 124 125 // register a current process for audio output change notifications 126 virtual void registerClient(const sp<IAudioFlingerClient>& client) = 0; 127 128 // retrieve the audio recording buffer size 129 virtual size_t getInputBufferSize(uint32_t sampleRate, audio_format_t format, int channelCount) const = 0; 130 131 virtual audio_io_handle_t openOutput(audio_module_handle_t module, 132 audio_devices_t *pDevices, 133 uint32_t *pSamplingRate, 134 audio_format_t *pFormat, 135 audio_channel_mask_t *pChannelMask, 136 uint32_t *pLatencyMs, 137 audio_output_flags_t flags) = 0; 138 virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1, 139 audio_io_handle_t output2) = 0; 140 virtual status_t closeOutput(audio_io_handle_t output) = 0; 141 virtual status_t suspendOutput(audio_io_handle_t output) = 0; 142 virtual status_t restoreOutput(audio_io_handle_t output) = 0; 143 144 virtual audio_io_handle_t openInput(audio_module_handle_t module, 145 audio_devices_t *pDevices, 146 uint32_t *pSamplingRate, 147 audio_format_t *pFormat, 148 audio_channel_mask_t *pChannelMask) = 0; 149 virtual status_t closeInput(audio_io_handle_t input) = 0; 150 151 virtual status_t setStreamOutput(audio_stream_type_t stream, audio_io_handle_t output) = 0; 152 153 virtual status_t setVoiceVolume(float volume) = 0; 154 155 virtual status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, 156 audio_io_handle_t output) const = 0; 157 158 virtual unsigned int getInputFramesLost(audio_io_handle_t ioHandle) const = 0; 159 160 virtual int newAudioSessionId() = 0; 161 162 virtual void acquireAudioSessionId(int audioSession) = 0; 163 virtual void releaseAudioSessionId(int audioSession) = 0; 164 165 virtual status_t queryNumberEffects(uint32_t *numEffects) const = 0; 166 167 virtual status_t queryEffect(uint32_t index, effect_descriptor_t *pDescriptor) const = 0; 168 169 virtual status_t getEffectDescriptor(const effect_uuid_t *pEffectUUID, 170 effect_descriptor_t *pDescriptor) const = 0; 171 172 virtual sp<IEffect> createEffect(pid_t pid, 173 effect_descriptor_t *pDesc, 174 const sp<IEffectClient>& client, 175 int32_t priority, 176 audio_io_handle_t output, 177 int sessionId, 178 status_t *status, 179 int *id, 180 int *enabled) = 0; 181 182 virtual status_t moveEffects(int session, audio_io_handle_t srcOutput, 183 audio_io_handle_t dstOutput) = 0; 184 185 virtual audio_module_handle_t loadHwModule(const char *name) = 0; 186 }; 187 188 189 // ---------------------------------------------------------------------------- 190 191 class BnAudioFlinger : public BnInterface<IAudioFlinger> 192 { 193 public: 194 virtual status_t onTransact( uint32_t code, 195 const Parcel& data, 196 Parcel* reply, 197 uint32_t flags = 0); 198 }; 199 200 // ---------------------------------------------------------------------------- 201 202 }; // namespace android 203 204 #endif // ANDROID_IAUDIOFLINGER_H 205
