1 /* 2 * Copyright (C) 2011 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 18 #ifndef ANDROID_AUDIO_CORE_H 19 #define ANDROID_AUDIO_CORE_H 20 21 #include <stdbool.h> 22 #include <stdint.h> 23 #include <stdio.h> 24 #include <sys/cdefs.h> 25 #include <sys/types.h> 26 27 #include <cutils/bitops.h> 28 29 __BEGIN_DECLS 30 31 /* The enums were moved here mostly from 32 * frameworks/base/include/media/AudioSystem.h 33 */ 34 35 /* device address used to refer to the standard remote submix */ 36 #define AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS "0" 37 38 /* AudioFlinger and AudioPolicy services use I/O handles to identify audio sources and sinks */ 39 typedef int audio_io_handle_t; 40 #define AUDIO_IO_HANDLE_NONE 0 41 42 /* Audio stream types */ 43 typedef enum { 44 /* These values must kept in sync with 45 * frameworks/base/media/java/android/media/AudioSystem.java 46 */ 47 AUDIO_STREAM_DEFAULT = -1, 48 AUDIO_STREAM_MIN = 0, 49 AUDIO_STREAM_VOICE_CALL = 0, 50 AUDIO_STREAM_SYSTEM = 1, 51 AUDIO_STREAM_RING = 2, 52 AUDIO_STREAM_MUSIC = 3, 53 AUDIO_STREAM_ALARM = 4, 54 AUDIO_STREAM_NOTIFICATION = 5, 55 AUDIO_STREAM_BLUETOOTH_SCO = 6, 56 AUDIO_STREAM_ENFORCED_AUDIBLE = 7, /* Sounds that cannot be muted by user 57 * and must be routed to speaker 58 */ 59 AUDIO_STREAM_DTMF = 8, 60 AUDIO_STREAM_TTS = 9, /* Transmitted Through Speaker. 61 * Plays over speaker only, silent on other devices. 62 */ 63 AUDIO_STREAM_ACCESSIBILITY = 10, /* For accessibility talk back prompts */ 64 AUDIO_STREAM_REROUTING = 11, /* For dynamic policy output mixes */ 65 AUDIO_STREAM_PATCH = 12, /* For internal audio flinger tracks. Fixed volume */ 66 AUDIO_STREAM_PUBLIC_CNT = AUDIO_STREAM_TTS + 1, 67 AUDIO_STREAM_CNT = AUDIO_STREAM_PATCH + 1, 68 } audio_stream_type_t; 69 70 /* Do not change these values without updating their counterparts 71 * in frameworks/base/media/java/android/media/AudioAttributes.java 72 */ 73 typedef enum { 74 AUDIO_CONTENT_TYPE_UNKNOWN = 0, 75 AUDIO_CONTENT_TYPE_SPEECH = 1, 76 AUDIO_CONTENT_TYPE_MUSIC = 2, 77 AUDIO_CONTENT_TYPE_MOVIE = 3, 78 AUDIO_CONTENT_TYPE_SONIFICATION = 4, 79 80 AUDIO_CONTENT_TYPE_CNT, 81 AUDIO_CONTENT_TYPE_MAX = AUDIO_CONTENT_TYPE_CNT - 1, 82 } audio_content_type_t; 83 84 /* Do not change these values without updating their counterparts 85 * in frameworks/base/media/java/android/media/AudioAttributes.java 86 */ 87 typedef enum { 88 AUDIO_USAGE_UNKNOWN = 0, 89 AUDIO_USAGE_MEDIA = 1, 90 AUDIO_USAGE_VOICE_COMMUNICATION = 2, 91 AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING = 3, 92 AUDIO_USAGE_ALARM = 4, 93 AUDIO_USAGE_NOTIFICATION = 5, 94 AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE = 6, 95 AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST = 7, 96 AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT = 8, 97 AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED = 9, 98 AUDIO_USAGE_NOTIFICATION_EVENT = 10, 99 AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY = 11, 100 AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE = 12, 101 AUDIO_USAGE_ASSISTANCE_SONIFICATION = 13, 102 AUDIO_USAGE_GAME = 14, 103 AUDIO_USAGE_VIRTUAL_SOURCE = 15, 104 105 AUDIO_USAGE_CNT, 106 AUDIO_USAGE_MAX = AUDIO_USAGE_CNT - 1, 107 } audio_usage_t; 108 109 typedef uint32_t audio_flags_mask_t; 110 111 /* Do not change these values without updating their counterparts 112 * in frameworks/base/media/java/android/media/AudioAttributes.java 113 */ 114 enum { 115 AUDIO_FLAG_AUDIBILITY_ENFORCED = 0x1, 116 AUDIO_FLAG_SECURE = 0x2, 117 AUDIO_FLAG_SCO = 0x4, 118 AUDIO_FLAG_BEACON = 0x8, 119 AUDIO_FLAG_HW_AV_SYNC = 0x10, 120 AUDIO_FLAG_HW_HOTWORD = 0x20, 121 }; 122 123 /* Do not change these values without updating their counterparts 124 * in frameworks/base/media/java/android/media/MediaRecorder.java, 125 * frameworks/av/services/audiopolicy/AudioPolicyService.cpp, 126 * and system/media/audio_effects/include/audio_effects/audio_effects_conf.h! 127 */ 128 typedef enum { 129 AUDIO_SOURCE_DEFAULT = 0, 130 AUDIO_SOURCE_MIC = 1, 131 AUDIO_SOURCE_VOICE_UPLINK = 2, 132 AUDIO_SOURCE_VOICE_DOWNLINK = 3, 133 AUDIO_SOURCE_VOICE_CALL = 4, 134 AUDIO_SOURCE_CAMCORDER = 5, 135 AUDIO_SOURCE_VOICE_RECOGNITION = 6, 136 AUDIO_SOURCE_VOICE_COMMUNICATION = 7, 137 AUDIO_SOURCE_REMOTE_SUBMIX = 8, /* Source for the mix to be presented remotely. */ 138 /* An example of remote presentation is Wifi Display */ 139 /* where a dongle attached to a TV can be used to */ 140 /* play the mix captured by this audio source. */ 141 AUDIO_SOURCE_CNT, 142 AUDIO_SOURCE_MAX = AUDIO_SOURCE_CNT - 1, 143 AUDIO_SOURCE_FM_TUNER = 1998, 144 AUDIO_SOURCE_HOTWORD = 1999, /* A low-priority, preemptible audio source for 145 for background software hotword detection. 146 Same tuning as AUDIO_SOURCE_VOICE_RECOGNITION. 147 Used only internally to the framework. Not exposed 148 at the audio HAL. */ 149 } audio_source_t; 150 151 /* Audio attributes */ 152 #define AUDIO_ATTRIBUTES_TAGS_MAX_SIZE 256 153 typedef struct { 154 audio_content_type_t content_type; 155 audio_usage_t usage; 156 audio_source_t source; 157 audio_flags_mask_t flags; 158 char tags[AUDIO_ATTRIBUTES_TAGS_MAX_SIZE]; /* UTF8 */ 159 } audio_attributes_t; 160 161 /* special audio session values 162 * (XXX: should this be living in the audio effects land?) 163 */ 164 typedef enum { 165 /* session for effects attached to a particular output stream 166 * (value must be less than 0) 167 */ 168 AUDIO_SESSION_OUTPUT_STAGE = -1, 169 170 /* session for effects applied to output mix. These effects can 171 * be moved by audio policy manager to another output stream 172 * (value must be 0) 173 */ 174 AUDIO_SESSION_OUTPUT_MIX = 0, 175 176 /* application does not specify an explicit session ID to be used, 177 * and requests a new session ID to be allocated 178 * TODO use unique values for AUDIO_SESSION_OUTPUT_MIX and AUDIO_SESSION_ALLOCATE, 179 * after all uses have been updated from 0 to the appropriate symbol, and have been tested. 180 */ 181 AUDIO_SESSION_ALLOCATE = 0, 182 } audio_session_t; 183 184 /* a unique ID allocated by AudioFlinger for use as a audio_io_handle_t or audio_session_t */ 185 typedef int audio_unique_id_t; 186 187 #define AUDIO_UNIQUE_ID_ALLOCATE AUDIO_SESSION_ALLOCATE 188 189 /* Audio sub formats (see enum audio_format). */ 190 191 /* PCM sub formats */ 192 typedef enum { 193 /* All of these are in native byte order */ 194 AUDIO_FORMAT_PCM_SUB_16_BIT = 0x1, /* DO NOT CHANGE - PCM signed 16 bits */ 195 AUDIO_FORMAT_PCM_SUB_8_BIT = 0x2, /* DO NOT CHANGE - PCM unsigned 8 bits */ 196 AUDIO_FORMAT_PCM_SUB_32_BIT = 0x3, /* PCM signed .31 fixed point */ 197 AUDIO_FORMAT_PCM_SUB_8_24_BIT = 0x4, /* PCM signed 7.24 fixed point */ 198 AUDIO_FORMAT_PCM_SUB_FLOAT = 0x5, /* PCM single-precision floating point */ 199 AUDIO_FORMAT_PCM_SUB_24_BIT_PACKED = 0x6, /* PCM signed .23 fixed point packed in 3 bytes */ 200 } audio_format_pcm_sub_fmt_t; 201 202 /* The audio_format_*_sub_fmt_t declarations are not currently used */ 203 204 /* MP3 sub format field definition : can use 11 LSBs in the same way as MP3 205 * frame header to specify bit rate, stereo mode, version... 206 */ 207 typedef enum { 208 AUDIO_FORMAT_MP3_SUB_NONE = 0x0, 209 } audio_format_mp3_sub_fmt_t; 210 211 /* AMR NB/WB sub format field definition: specify frame block interleaving, 212 * bandwidth efficient or octet aligned, encoding mode for recording... 213 */ 214 typedef enum { 215 AUDIO_FORMAT_AMR_SUB_NONE = 0x0, 216 } audio_format_amr_sub_fmt_t; 217 218 /* AAC sub format field definition: specify profile or bitrate for recording... */ 219 typedef enum { 220 AUDIO_FORMAT_AAC_SUB_MAIN = 0x1, 221 AUDIO_FORMAT_AAC_SUB_LC = 0x2, 222 AUDIO_FORMAT_AAC_SUB_SSR = 0x4, 223 AUDIO_FORMAT_AAC_SUB_LTP = 0x8, 224 AUDIO_FORMAT_AAC_SUB_HE_V1 = 0x10, 225 AUDIO_FORMAT_AAC_SUB_SCALABLE = 0x20, 226 AUDIO_FORMAT_AAC_SUB_ERLC = 0x40, 227 AUDIO_FORMAT_AAC_SUB_LD = 0x80, 228 AUDIO_FORMAT_AAC_SUB_HE_V2 = 0x100, 229 AUDIO_FORMAT_AAC_SUB_ELD = 0x200, 230 } audio_format_aac_sub_fmt_t; 231 232 /* VORBIS sub format field definition: specify quality for recording... */ 233 typedef enum { 234 AUDIO_FORMAT_VORBIS_SUB_NONE = 0x0, 235 } audio_format_vorbis_sub_fmt_t; 236 237 /* Audio format consists of a main format field (upper 8 bits) and a sub format 238 * field (lower 24 bits). 239 * 240 * The main format indicates the main codec type. The sub format field 241 * indicates options and parameters for each format. The sub format is mainly 242 * used for record to indicate for instance the requested bitrate or profile. 243 * It can also be used for certain formats to give informations not present in 244 * the encoded audio stream (e.g. octet alignement for AMR). 245 */ 246 typedef enum { 247 AUDIO_FORMAT_INVALID = 0xFFFFFFFFUL, 248 AUDIO_FORMAT_DEFAULT = 0, 249 AUDIO_FORMAT_PCM = 0x00000000UL, /* DO NOT CHANGE */ 250 AUDIO_FORMAT_MP3 = 0x01000000UL, 251 AUDIO_FORMAT_AMR_NB = 0x02000000UL, 252 AUDIO_FORMAT_AMR_WB = 0x03000000UL, 253 AUDIO_FORMAT_AAC = 0x04000000UL, 254 AUDIO_FORMAT_HE_AAC_V1 = 0x05000000UL, /* Deprecated, Use AUDIO_FORMAT_AAC_HE_V1*/ 255 AUDIO_FORMAT_HE_AAC_V2 = 0x06000000UL, /* Deprecated, Use AUDIO_FORMAT_AAC_HE_V2*/ 256 AUDIO_FORMAT_VORBIS = 0x07000000UL, 257 AUDIO_FORMAT_OPUS = 0x08000000UL, 258 AUDIO_FORMAT_AC3 = 0x09000000UL, 259 AUDIO_FORMAT_E_AC3 = 0x0A000000UL, 260 AUDIO_FORMAT_MAIN_MASK = 0xFF000000UL, 261 AUDIO_FORMAT_SUB_MASK = 0x00FFFFFFUL, 262 263 /* Aliases */ 264 /* note != AudioFormat.ENCODING_PCM_16BIT */ 265 AUDIO_FORMAT_PCM_16_BIT = (AUDIO_FORMAT_PCM | 266 AUDIO_FORMAT_PCM_SUB_16_BIT), 267 /* note != AudioFormat.ENCODING_PCM_8BIT */ 268 AUDIO_FORMAT_PCM_8_BIT = (AUDIO_FORMAT_PCM | 269 AUDIO_FORMAT_PCM_SUB_8_BIT), 270 AUDIO_FORMAT_PCM_32_BIT = (AUDIO_FORMAT_PCM | 271 AUDIO_FORMAT_PCM_SUB_32_BIT), 272 AUDIO_FORMAT_PCM_8_24_BIT = (AUDIO_FORMAT_PCM | 273 AUDIO_FORMAT_PCM_SUB_8_24_BIT), 274 AUDIO_FORMAT_PCM_FLOAT = (AUDIO_FORMAT_PCM | 275 AUDIO_FORMAT_PCM_SUB_FLOAT), 276 AUDIO_FORMAT_PCM_24_BIT_PACKED = (AUDIO_FORMAT_PCM | 277 AUDIO_FORMAT_PCM_SUB_24_BIT_PACKED), 278 AUDIO_FORMAT_AAC_MAIN = (AUDIO_FORMAT_AAC | 279 AUDIO_FORMAT_AAC_SUB_MAIN), 280 AUDIO_FORMAT_AAC_LC = (AUDIO_FORMAT_AAC | 281 AUDIO_FORMAT_AAC_SUB_LC), 282 AUDIO_FORMAT_AAC_SSR = (AUDIO_FORMAT_AAC | 283 AUDIO_FORMAT_AAC_SUB_SSR), 284 AUDIO_FORMAT_AAC_LTP = (AUDIO_FORMAT_AAC | 285 AUDIO_FORMAT_AAC_SUB_LTP), 286 AUDIO_FORMAT_AAC_HE_V1 = (AUDIO_FORMAT_AAC | 287 AUDIO_FORMAT_AAC_SUB_HE_V1), 288 AUDIO_FORMAT_AAC_SCALABLE = (AUDIO_FORMAT_AAC | 289 AUDIO_FORMAT_AAC_SUB_SCALABLE), 290 AUDIO_FORMAT_AAC_ERLC = (AUDIO_FORMAT_AAC | 291 AUDIO_FORMAT_AAC_SUB_ERLC), 292 AUDIO_FORMAT_AAC_LD = (AUDIO_FORMAT_AAC | 293 AUDIO_FORMAT_AAC_SUB_LD), 294 AUDIO_FORMAT_AAC_HE_V2 = (AUDIO_FORMAT_AAC | 295 AUDIO_FORMAT_AAC_SUB_HE_V2), 296 AUDIO_FORMAT_AAC_ELD = (AUDIO_FORMAT_AAC | 297 AUDIO_FORMAT_AAC_SUB_ELD), 298 } audio_format_t; 299 300 /* For the channel mask for position assignment representation */ 301 enum { 302 303 /* These can be a complete audio_channel_mask_t. */ 304 305 AUDIO_CHANNEL_NONE = 0x0, 306 AUDIO_CHANNEL_INVALID = 0xC0000000, 307 308 /* These can be the bits portion of an audio_channel_mask_t 309 * with representation AUDIO_CHANNEL_REPRESENTATION_POSITION. 310 * Using these bits as a complete audio_channel_mask_t is deprecated. 311 */ 312 313 /* output channels */ 314 AUDIO_CHANNEL_OUT_FRONT_LEFT = 0x1, 315 AUDIO_CHANNEL_OUT_FRONT_RIGHT = 0x2, 316 AUDIO_CHANNEL_OUT_FRONT_CENTER = 0x4, 317 AUDIO_CHANNEL_OUT_LOW_FREQUENCY = 0x8, 318 AUDIO_CHANNEL_OUT_BACK_LEFT = 0x10, 319 AUDIO_CHANNEL_OUT_BACK_RIGHT = 0x20, 320 AUDIO_CHANNEL_OUT_FRONT_LEFT_OF_CENTER = 0x40, 321 AUDIO_CHANNEL_OUT_FRONT_RIGHT_OF_CENTER = 0x80, 322 AUDIO_CHANNEL_OUT_BACK_CENTER = 0x100, 323 AUDIO_CHANNEL_OUT_SIDE_LEFT = 0x200, 324 AUDIO_CHANNEL_OUT_SIDE_RIGHT = 0x400, 325 AUDIO_CHANNEL_OUT_TOP_CENTER = 0x800, 326 AUDIO_CHANNEL_OUT_TOP_FRONT_LEFT = 0x1000, 327 AUDIO_CHANNEL_OUT_TOP_FRONT_CENTER = 0x2000, 328 AUDIO_CHANNEL_OUT_TOP_FRONT_RIGHT = 0x4000, 329 AUDIO_CHANNEL_OUT_TOP_BACK_LEFT = 0x8000, 330 AUDIO_CHANNEL_OUT_TOP_BACK_CENTER = 0x10000, 331 AUDIO_CHANNEL_OUT_TOP_BACK_RIGHT = 0x20000, 332 333 /* TODO: should these be considered complete channel masks, or only bits? */ 334 335 AUDIO_CHANNEL_OUT_MONO = AUDIO_CHANNEL_OUT_FRONT_LEFT, 336 AUDIO_CHANNEL_OUT_STEREO = (AUDIO_CHANNEL_OUT_FRONT_LEFT | 337 AUDIO_CHANNEL_OUT_FRONT_RIGHT), 338 AUDIO_CHANNEL_OUT_QUAD = (AUDIO_CHANNEL_OUT_FRONT_LEFT | 339 AUDIO_CHANNEL_OUT_FRONT_RIGHT | 340 AUDIO_CHANNEL_OUT_BACK_LEFT | 341 AUDIO_CHANNEL_OUT_BACK_RIGHT), 342 AUDIO_CHANNEL_OUT_QUAD_BACK = AUDIO_CHANNEL_OUT_QUAD, 343 /* like AUDIO_CHANNEL_OUT_QUAD_BACK with *_SIDE_* instead of *_BACK_* */ 344 AUDIO_CHANNEL_OUT_QUAD_SIDE = (AUDIO_CHANNEL_OUT_FRONT_LEFT | 345 AUDIO_CHANNEL_OUT_FRONT_RIGHT | 346 AUDIO_CHANNEL_OUT_SIDE_LEFT | 347 AUDIO_CHANNEL_OUT_SIDE_RIGHT), 348 AUDIO_CHANNEL_OUT_5POINT1 = (AUDIO_CHANNEL_OUT_FRONT_LEFT | 349 AUDIO_CHANNEL_OUT_FRONT_RIGHT | 350 AUDIO_CHANNEL_OUT_FRONT_CENTER | 351 AUDIO_CHANNEL_OUT_LOW_FREQUENCY | 352 AUDIO_CHANNEL_OUT_BACK_LEFT | 353 AUDIO_CHANNEL_OUT_BACK_RIGHT), 354 AUDIO_CHANNEL_OUT_5POINT1_BACK = AUDIO_CHANNEL_OUT_5POINT1, 355 /* like AUDIO_CHANNEL_OUT_5POINT1_BACK with *_SIDE_* instead of *_BACK_* */ 356 AUDIO_CHANNEL_OUT_5POINT1_SIDE = (AUDIO_CHANNEL_OUT_FRONT_LEFT | 357 AUDIO_CHANNEL_OUT_FRONT_RIGHT | 358 AUDIO_CHANNEL_OUT_FRONT_CENTER | 359 AUDIO_CHANNEL_OUT_LOW_FREQUENCY | 360 AUDIO_CHANNEL_OUT_SIDE_LEFT | 361 AUDIO_CHANNEL_OUT_SIDE_RIGHT), 362 // matches the correct AudioFormat.CHANNEL_OUT_7POINT1_SURROUND definition for 7.1 363 AUDIO_CHANNEL_OUT_7POINT1 = (AUDIO_CHANNEL_OUT_FRONT_LEFT | 364 AUDIO_CHANNEL_OUT_FRONT_RIGHT | 365 AUDIO_CHANNEL_OUT_FRONT_CENTER | 366 AUDIO_CHANNEL_OUT_LOW_FREQUENCY | 367 AUDIO_CHANNEL_OUT_BACK_LEFT | 368 AUDIO_CHANNEL_OUT_BACK_RIGHT | 369 AUDIO_CHANNEL_OUT_SIDE_LEFT | 370 AUDIO_CHANNEL_OUT_SIDE_RIGHT), 371 AUDIO_CHANNEL_OUT_ALL = (AUDIO_CHANNEL_OUT_FRONT_LEFT | 372 AUDIO_CHANNEL_OUT_FRONT_RIGHT | 373 AUDIO_CHANNEL_OUT_FRONT_CENTER | 374 AUDIO_CHANNEL_OUT_LOW_FREQUENCY | 375 AUDIO_CHANNEL_OUT_BACK_LEFT | 376 AUDIO_CHANNEL_OUT_BACK_RIGHT | 377 AUDIO_CHANNEL_OUT_FRONT_LEFT_OF_CENTER | 378 AUDIO_CHANNEL_OUT_FRONT_RIGHT_OF_CENTER | 379 AUDIO_CHANNEL_OUT_BACK_CENTER| 380 AUDIO_CHANNEL_OUT_SIDE_LEFT| 381 AUDIO_CHANNEL_OUT_SIDE_RIGHT| 382 AUDIO_CHANNEL_OUT_TOP_CENTER| 383 AUDIO_CHANNEL_OUT_TOP_FRONT_LEFT| 384 AUDIO_CHANNEL_OUT_TOP_FRONT_CENTER| 385 AUDIO_CHANNEL_OUT_TOP_FRONT_RIGHT| 386 AUDIO_CHANNEL_OUT_TOP_BACK_LEFT| 387 AUDIO_CHANNEL_OUT_TOP_BACK_CENTER| 388 AUDIO_CHANNEL_OUT_TOP_BACK_RIGHT), 389 390 /* These are bits only, not complete values */ 391 392 /* input channels */ 393 AUDIO_CHANNEL_IN_LEFT = 0x4, 394 AUDIO_CHANNEL_IN_RIGHT = 0x8, 395 AUDIO_CHANNEL_IN_FRONT = 0x10, 396 AUDIO_CHANNEL_IN_BACK = 0x20, 397 AUDIO_CHANNEL_IN_LEFT_PROCESSED = 0x40, 398 AUDIO_CHANNEL_IN_RIGHT_PROCESSED = 0x80, 399 AUDIO_CHANNEL_IN_FRONT_PROCESSED = 0x100, 400 AUDIO_CHANNEL_IN_BACK_PROCESSED = 0x200, 401 AUDIO_CHANNEL_IN_PRESSURE = 0x400, 402 AUDIO_CHANNEL_IN_X_AXIS = 0x800, 403 AUDIO_CHANNEL_IN_Y_AXIS = 0x1000, 404 AUDIO_CHANNEL_IN_Z_AXIS = 0x2000, 405 AUDIO_CHANNEL_IN_VOICE_UPLINK = 0x4000, 406 AUDIO_CHANNEL_IN_VOICE_DNLINK = 0x8000, 407 408 /* TODO: should these be considered complete channel masks, or only bits, or deprecated? */ 409 410 AUDIO_CHANNEL_IN_MONO = AUDIO_CHANNEL_IN_FRONT, 411 AUDIO_CHANNEL_IN_STEREO = (AUDIO_CHANNEL_IN_LEFT | AUDIO_CHANNEL_IN_RIGHT), 412 AUDIO_CHANNEL_IN_FRONT_BACK = (AUDIO_CHANNEL_IN_FRONT | AUDIO_CHANNEL_IN_BACK), 413 AUDIO_CHANNEL_IN_ALL = (AUDIO_CHANNEL_IN_LEFT | 414 AUDIO_CHANNEL_IN_RIGHT | 415 AUDIO_CHANNEL_IN_FRONT | 416 AUDIO_CHANNEL_IN_BACK| 417 AUDIO_CHANNEL_IN_LEFT_PROCESSED | 418 AUDIO_CHANNEL_IN_RIGHT_PROCESSED | 419 AUDIO_CHANNEL_IN_FRONT_PROCESSED | 420 AUDIO_CHANNEL_IN_BACK_PROCESSED| 421 AUDIO_CHANNEL_IN_PRESSURE | 422 AUDIO_CHANNEL_IN_X_AXIS | 423 AUDIO_CHANNEL_IN_Y_AXIS | 424 AUDIO_CHANNEL_IN_Z_AXIS | 425 AUDIO_CHANNEL_IN_VOICE_UPLINK | 426 AUDIO_CHANNEL_IN_VOICE_DNLINK), 427 }; 428 429 /* A channel mask per se only defines the presence or absence of a channel, not the order. 430 * But see AUDIO_INTERLEAVE_* below for the platform convention of order. 431 * 432 * audio_channel_mask_t is an opaque type and its internal layout should not 433 * be assumed as it may change in the future. 434 * Instead, always use the functions declared in this header to examine. 435 * 436 * These are the current representations: 437 * 438 * AUDIO_CHANNEL_REPRESENTATION_POSITION 439 * is a channel mask representation for position assignment. 440 * Each low-order bit corresponds to the spatial position of a transducer (output), 441 * or interpretation of channel (input). 442 * The user of a channel mask needs to know the context of whether it is for output or input. 443 * The constants AUDIO_CHANNEL_OUT_* or AUDIO_CHANNEL_IN_* apply to the bits portion. 444 * It is not permitted for no bits to be set. 445 * 446 * AUDIO_CHANNEL_REPRESENTATION_INDEX 447 * is a channel mask representation for index assignment. 448 * Each low-order bit corresponds to a selected channel. 449 * There is no platform interpretation of the various bits. 450 * There is no concept of output or input. 451 * It is not permitted for no bits to be set. 452 * 453 * All other representations are reserved for future use. 454 * 455 * Warning: current representation distinguishes between input and output, but this will not the be 456 * case in future revisions of the platform. Wherever there is an ambiguity between input and output 457 * that is currently resolved by checking the channel mask, the implementer should look for ways to 458 * fix it with additional information outside of the mask. 459 */ 460 typedef uint32_t audio_channel_mask_t; 461 462 /* Maximum number of channels for all representations */ 463 #define AUDIO_CHANNEL_COUNT_MAX 30 464 465 /* log(2) of maximum number of representations, not part of public API */ 466 #define AUDIO_CHANNEL_REPRESENTATION_LOG2 2 467 468 /* Representations */ 469 typedef enum { 470 AUDIO_CHANNEL_REPRESENTATION_POSITION = 0, // must be zero for compatibility 471 // 1 is reserved for future use 472 AUDIO_CHANNEL_REPRESENTATION_INDEX = 2, 473 // 3 is reserved for future use 474 } audio_channel_representation_t; 475 476 /* The return value is undefined if the channel mask is invalid. */ 477 static inline uint32_t audio_channel_mask_get_bits(audio_channel_mask_t channel) 478 { 479 return channel & ((1 << AUDIO_CHANNEL_COUNT_MAX) - 1); 480 } 481 482 /* The return value is undefined if the channel mask is invalid. */ 483 static inline audio_channel_representation_t audio_channel_mask_get_representation( 484 audio_channel_mask_t channel) 485 { 486 // The right shift should be sufficient, but also "and" for safety in case mask is not 32 bits 487 return (audio_channel_representation_t) 488 ((channel >> AUDIO_CHANNEL_COUNT_MAX) & ((1 << AUDIO_CHANNEL_REPRESENTATION_LOG2) - 1)); 489 } 490 491 /* Returns true if the channel mask is valid, 492 * or returns false for AUDIO_CHANNEL_NONE, AUDIO_CHANNEL_INVALID, and other invalid values. 493 * This function is unable to determine whether a channel mask for position assignment 494 * is invalid because an output mask has an invalid output bit set, 495 * or because an input mask has an invalid input bit set. 496 * All other APIs that take a channel mask assume that it is valid. 497 */ 498 static inline bool audio_channel_mask_is_valid(audio_channel_mask_t channel) 499 { 500 uint32_t bits = audio_channel_mask_get_bits(channel); 501 audio_channel_representation_t representation = audio_channel_mask_get_representation(channel); 502 switch (representation) { 503 case AUDIO_CHANNEL_REPRESENTATION_POSITION: 504 case AUDIO_CHANNEL_REPRESENTATION_INDEX: 505 break; 506 default: 507 bits = 0; 508 break; 509 } 510 return bits != 0; 511 } 512 513 /* Not part of public API */ 514 static inline audio_channel_mask_t audio_channel_mask_from_representation_and_bits( 515 audio_channel_representation_t representation, uint32_t bits) 516 { 517 return (audio_channel_mask_t) ((representation << AUDIO_CHANNEL_COUNT_MAX) | bits); 518 } 519 520 /* Expresses the convention when stereo audio samples are stored interleaved 521 * in an array. This should improve readability by allowing code to use 522 * symbolic indices instead of hard-coded [0] and [1]. 523 * 524 * For multi-channel beyond stereo, the platform convention is that channels 525 * are interleaved in order from least significant channel mask bit 526 * to most significant channel mask bit, with unused bits skipped. 527 * Any exceptions to this convention will be noted at the appropriate API. 528 */ 529 enum { 530 AUDIO_INTERLEAVE_LEFT = 0, 531 AUDIO_INTERLEAVE_RIGHT = 1, 532 }; 533 534 typedef enum { 535 AUDIO_MODE_INVALID = -2, 536 AUDIO_MODE_CURRENT = -1, 537 AUDIO_MODE_NORMAL = 0, 538 AUDIO_MODE_RINGTONE = 1, 539 AUDIO_MODE_IN_CALL = 2, 540 AUDIO_MODE_IN_COMMUNICATION = 3, 541 542 AUDIO_MODE_CNT, 543 AUDIO_MODE_MAX = AUDIO_MODE_CNT - 1, 544 } audio_mode_t; 545 546 /* This enum is deprecated */ 547 typedef enum { 548 AUDIO_IN_ACOUSTICS_NONE = 0, 549 AUDIO_IN_ACOUSTICS_AGC_ENABLE = 0x0001, 550 AUDIO_IN_ACOUSTICS_AGC_DISABLE = 0, 551 AUDIO_IN_ACOUSTICS_NS_ENABLE = 0x0002, 552 AUDIO_IN_ACOUSTICS_NS_DISABLE = 0, 553 AUDIO_IN_ACOUSTICS_TX_IIR_ENABLE = 0x0004, 554 AUDIO_IN_ACOUSTICS_TX_DISABLE = 0, 555 } audio_in_acoustics_t; 556 557 enum { 558 AUDIO_DEVICE_NONE = 0x0, 559 /* reserved bits */ 560 AUDIO_DEVICE_BIT_IN = 0x80000000, 561 AUDIO_DEVICE_BIT_DEFAULT = 0x40000000, 562 /* output devices */ 563 AUDIO_DEVICE_OUT_EARPIECE = 0x1, 564 AUDIO_DEVICE_OUT_SPEAKER = 0x2, 565 AUDIO_DEVICE_OUT_WIRED_HEADSET = 0x4, 566 AUDIO_DEVICE_OUT_WIRED_HEADPHONE = 0x8, 567 AUDIO_DEVICE_OUT_BLUETOOTH_SCO = 0x10, 568 AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET = 0x20, 569 AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT = 0x40, 570 AUDIO_DEVICE_OUT_BLUETOOTH_A2DP = 0x80, 571 AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES = 0x100, 572 AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER = 0x200, 573 AUDIO_DEVICE_OUT_AUX_DIGITAL = 0x400, 574 AUDIO_DEVICE_OUT_HDMI = AUDIO_DEVICE_OUT_AUX_DIGITAL, 575 /* uses an analog connection (multiplexed over the USB connector pins for instance) */ 576 AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET = 0x800, 577 AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET = 0x1000, 578 /* USB accessory mode: your Android device is a USB device and the dock is a USB host */ 579 AUDIO_DEVICE_OUT_USB_ACCESSORY = 0x2000, 580 /* USB host mode: your Android device is a USB host and the dock is a USB device */ 581 AUDIO_DEVICE_OUT_USB_DEVICE = 0x4000, 582 AUDIO_DEVICE_OUT_REMOTE_SUBMIX = 0x8000, 583 /* Telephony voice TX path */ 584 AUDIO_DEVICE_OUT_TELEPHONY_TX = 0x10000, 585 /* Analog jack with line impedance detected */ 586 AUDIO_DEVICE_OUT_LINE = 0x20000, 587 /* HDMI Audio Return Channel */ 588 AUDIO_DEVICE_OUT_HDMI_ARC = 0x40000, 589 /* S/PDIF out */ 590 AUDIO_DEVICE_OUT_SPDIF = 0x80000, 591 /* FM transmitter out */ 592 AUDIO_DEVICE_OUT_FM = 0x100000, 593 /* Line out for av devices */ 594 AUDIO_DEVICE_OUT_AUX_LINE = 0x200000, 595 /* limited-output speaker device for acoustic safety */ 596 AUDIO_DEVICE_OUT_SPEAKER_SAFE = 0x400000, 597 AUDIO_DEVICE_OUT_DEFAULT = AUDIO_DEVICE_BIT_DEFAULT, 598 AUDIO_DEVICE_OUT_ALL = (AUDIO_DEVICE_OUT_EARPIECE | 599 AUDIO_DEVICE_OUT_SPEAKER | 600 AUDIO_DEVICE_OUT_WIRED_HEADSET | 601 AUDIO_DEVICE_OUT_WIRED_HEADPHONE | 602 AUDIO_DEVICE_OUT_BLUETOOTH_SCO | 603 AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET | 604 AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT | 605 AUDIO_DEVICE_OUT_BLUETOOTH_A2DP | 606 AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES | 607 AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER | 608 AUDIO_DEVICE_OUT_HDMI | 609 AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET | 610 AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET | 611 AUDIO_DEVICE_OUT_USB_ACCESSORY | 612 AUDIO_DEVICE_OUT_USB_DEVICE | 613 AUDIO_DEVICE_OUT_REMOTE_SUBMIX | 614 AUDIO_DEVICE_OUT_TELEPHONY_TX | 615 AUDIO_DEVICE_OUT_LINE | 616 AUDIO_DEVICE_OUT_HDMI_ARC | 617 AUDIO_DEVICE_OUT_SPDIF | 618 AUDIO_DEVICE_OUT_FM | 619 AUDIO_DEVICE_OUT_AUX_LINE | 620 AUDIO_DEVICE_OUT_SPEAKER_SAFE | 621 AUDIO_DEVICE_OUT_DEFAULT), 622 AUDIO_DEVICE_OUT_ALL_A2DP = (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP | 623 AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES | 624 AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER), 625 AUDIO_DEVICE_OUT_ALL_SCO = (AUDIO_DEVICE_OUT_BLUETOOTH_SCO | 626 AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET | 627 AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT), 628 AUDIO_DEVICE_OUT_ALL_USB = (AUDIO_DEVICE_OUT_USB_ACCESSORY | 629 AUDIO_DEVICE_OUT_USB_DEVICE), 630 631 /* input devices */ 632 AUDIO_DEVICE_IN_COMMUNICATION = AUDIO_DEVICE_BIT_IN | 0x1, 633 AUDIO_DEVICE_IN_AMBIENT = AUDIO_DEVICE_BIT_IN | 0x2, 634 AUDIO_DEVICE_IN_BUILTIN_MIC = AUDIO_DEVICE_BIT_IN | 0x4, 635 AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET = AUDIO_DEVICE_BIT_IN | 0x8, 636 AUDIO_DEVICE_IN_WIRED_HEADSET = AUDIO_DEVICE_BIT_IN | 0x10, 637 AUDIO_DEVICE_IN_AUX_DIGITAL = AUDIO_DEVICE_BIT_IN | 0x20, 638 AUDIO_DEVICE_IN_HDMI = AUDIO_DEVICE_IN_AUX_DIGITAL, 639 /* Telephony voice RX path */ 640 AUDIO_DEVICE_IN_VOICE_CALL = AUDIO_DEVICE_BIT_IN | 0x40, 641 AUDIO_DEVICE_IN_TELEPHONY_RX = AUDIO_DEVICE_IN_VOICE_CALL, 642 AUDIO_DEVICE_IN_BACK_MIC = AUDIO_DEVICE_BIT_IN | 0x80, 643 AUDIO_DEVICE_IN_REMOTE_SUBMIX = AUDIO_DEVICE_BIT_IN | 0x100, 644 AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET = AUDIO_DEVICE_BIT_IN | 0x200, 645 AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET = AUDIO_DEVICE_BIT_IN | 0x400, 646 AUDIO_DEVICE_IN_USB_ACCESSORY = AUDIO_DEVICE_BIT_IN | 0x800, 647 AUDIO_DEVICE_IN_USB_DEVICE = AUDIO_DEVICE_BIT_IN | 0x1000, 648 /* FM tuner input */ 649 AUDIO_DEVICE_IN_FM_TUNER = AUDIO_DEVICE_BIT_IN | 0x2000, 650 /* TV tuner input */ 651 AUDIO_DEVICE_IN_TV_TUNER = AUDIO_DEVICE_BIT_IN | 0x4000, 652 /* Analog jack with line impedance detected */ 653 AUDIO_DEVICE_IN_LINE = AUDIO_DEVICE_BIT_IN | 0x8000, 654 /* S/PDIF in */ 655 AUDIO_DEVICE_IN_SPDIF = AUDIO_DEVICE_BIT_IN | 0x10000, 656 AUDIO_DEVICE_IN_BLUETOOTH_A2DP = AUDIO_DEVICE_BIT_IN | 0x20000, 657 AUDIO_DEVICE_IN_LOOPBACK = AUDIO_DEVICE_BIT_IN | 0x40000, 658 AUDIO_DEVICE_IN_DEFAULT = AUDIO_DEVICE_BIT_IN | AUDIO_DEVICE_BIT_DEFAULT, 659 660 AUDIO_DEVICE_IN_ALL = (AUDIO_DEVICE_IN_COMMUNICATION | 661 AUDIO_DEVICE_IN_AMBIENT | 662 AUDIO_DEVICE_IN_BUILTIN_MIC | 663 AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET | 664 AUDIO_DEVICE_IN_WIRED_HEADSET | 665 AUDIO_DEVICE_IN_HDMI | 666 AUDIO_DEVICE_IN_TELEPHONY_RX | 667 AUDIO_DEVICE_IN_BACK_MIC | 668 AUDIO_DEVICE_IN_REMOTE_SUBMIX | 669 AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET | 670 AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET | 671 AUDIO_DEVICE_IN_USB_ACCESSORY | 672 AUDIO_DEVICE_IN_USB_DEVICE | 673 AUDIO_DEVICE_IN_FM_TUNER | 674 AUDIO_DEVICE_IN_TV_TUNER | 675 AUDIO_DEVICE_IN_LINE | 676 AUDIO_DEVICE_IN_SPDIF | 677 AUDIO_DEVICE_IN_BLUETOOTH_A2DP | 678 AUDIO_DEVICE_IN_LOOPBACK | 679 AUDIO_DEVICE_IN_DEFAULT), 680 AUDIO_DEVICE_IN_ALL_SCO = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET, 681 AUDIO_DEVICE_IN_ALL_USB = (AUDIO_DEVICE_IN_USB_ACCESSORY | 682 AUDIO_DEVICE_IN_USB_DEVICE), 683 }; 684 685 typedef uint32_t audio_devices_t; 686 687 /* the audio output flags serve two purposes: 688 * - when an AudioTrack is created they indicate a "wish" to be connected to an 689 * output stream with attributes corresponding to the specified flags 690 * - when present in an output profile descriptor listed for a particular audio 691 * hardware module, they indicate that an output stream can be opened that 692 * supports the attributes indicated by the flags. 693 * the audio policy manager will try to match the flags in the request 694 * (when getOuput() is called) to an available output stream. 695 */ 696 typedef enum { 697 AUDIO_OUTPUT_FLAG_NONE = 0x0, // no attributes 698 AUDIO_OUTPUT_FLAG_DIRECT = 0x1, // this output directly connects a track 699 // to one output stream: no software mixer 700 AUDIO_OUTPUT_FLAG_PRIMARY = 0x2, // this output is the primary output of 701 // the device. It is unique and must be 702 // present. It is opened by default and 703 // receives routing, audio mode and volume 704 // controls related to voice calls. 705 AUDIO_OUTPUT_FLAG_FAST = 0x4, // output supports "fast tracks", 706 // defined elsewhere 707 AUDIO_OUTPUT_FLAG_DEEP_BUFFER = 0x8, // use deep audio buffers 708 AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD = 0x10, // offload playback of compressed 709 // streams to hardware codec 710 AUDIO_OUTPUT_FLAG_NON_BLOCKING = 0x20, // use non-blocking write 711 AUDIO_OUTPUT_FLAG_HW_AV_SYNC = 0x40 // output uses a hardware A/V synchronization source 712 } audio_output_flags_t; 713 714 /* The audio input flags are analogous to audio output flags. 715 * Currently they are used only when an AudioRecord is created, 716 * to indicate a preference to be connected to an input stream with 717 * attributes corresponding to the specified flags. 718 */ 719 typedef enum { 720 AUDIO_INPUT_FLAG_NONE = 0x0, // no attributes 721 AUDIO_INPUT_FLAG_FAST = 0x1, // prefer an input that supports "fast tracks" 722 AUDIO_INPUT_FLAG_HW_HOTWORD = 0x2, // prefer an input that captures from hw hotword source 723 } audio_input_flags_t; 724 725 /* Additional information about compressed streams offloaded to 726 * hardware playback 727 * The version and size fields must be initialized by the caller by using 728 * one of the constants defined here. 729 */ 730 typedef struct { 731 uint16_t version; // version of the info structure 732 uint16_t size; // total size of the structure including version and size 733 uint32_t sample_rate; // sample rate in Hz 734 audio_channel_mask_t channel_mask; // channel mask 735 audio_format_t format; // audio format 736 audio_stream_type_t stream_type; // stream type 737 uint32_t bit_rate; // bit rate in bits per second 738 int64_t duration_us; // duration in microseconds, -1 if unknown 739 bool has_video; // true if stream is tied to a video stream 740 bool is_streaming; // true if streaming, false if local playback 741 } audio_offload_info_t; 742 743 #define AUDIO_MAKE_OFFLOAD_INFO_VERSION(maj,min) \ 744 ((((maj) & 0xff) << 8) | ((min) & 0xff)) 745 746 #define AUDIO_OFFLOAD_INFO_VERSION_0_1 AUDIO_MAKE_OFFLOAD_INFO_VERSION(0, 1) 747 #define AUDIO_OFFLOAD_INFO_VERSION_CURRENT AUDIO_OFFLOAD_INFO_VERSION_0_1 748 749 static const audio_offload_info_t AUDIO_INFO_INITIALIZER = { 750 version: AUDIO_OFFLOAD_INFO_VERSION_CURRENT, 751 size: sizeof(audio_offload_info_t), 752 sample_rate: 0, 753 channel_mask: 0, 754 format: AUDIO_FORMAT_DEFAULT, 755 stream_type: AUDIO_STREAM_VOICE_CALL, 756 bit_rate: 0, 757 duration_us: 0, 758 has_video: false, 759 is_streaming: false 760 }; 761 762 /* common audio stream configuration parameters 763 * You should memset() the entire structure to zero before use to 764 * ensure forward compatibility 765 */ 766 struct audio_config { 767 uint32_t sample_rate; 768 audio_channel_mask_t channel_mask; 769 audio_format_t format; 770 audio_offload_info_t offload_info; 771 size_t frame_count; 772 }; 773 typedef struct audio_config audio_config_t; 774 775 static const audio_config_t AUDIO_CONFIG_INITIALIZER = { 776 sample_rate: 0, 777 channel_mask: AUDIO_CHANNEL_NONE, 778 format: AUDIO_FORMAT_DEFAULT, 779 offload_info: { 780 version: AUDIO_OFFLOAD_INFO_VERSION_CURRENT, 781 size: sizeof(audio_offload_info_t), 782 sample_rate: 0, 783 channel_mask: 0, 784 format: AUDIO_FORMAT_DEFAULT, 785 stream_type: AUDIO_STREAM_VOICE_CALL, 786 bit_rate: 0, 787 duration_us: 0, 788 has_video: false, 789 is_streaming: false 790 }, 791 frame_count: 0, 792 }; 793 794 795 /* audio hw module handle functions or structures referencing a module */ 796 typedef int audio_module_handle_t; 797 798 /****************************** 799 * Volume control 800 *****************************/ 801 802 /* If the audio hardware supports gain control on some audio paths, 803 * the platform can expose them in the audio_policy.conf file. The audio HAL 804 * will then implement gain control functions that will use the following data 805 * structures. */ 806 807 /* Type of gain control exposed by an audio port */ 808 #define AUDIO_GAIN_MODE_JOINT 0x1 /* supports joint channel gain control */ 809 #define AUDIO_GAIN_MODE_CHANNELS 0x2 /* supports separate channel gain control */ 810 #define AUDIO_GAIN_MODE_RAMP 0x4 /* supports gain ramps */ 811 812 typedef uint32_t audio_gain_mode_t; 813 814 815 /* An audio_gain struct is a representation of a gain stage. 816 * A gain stage is always attached to an audio port. */ 817 struct audio_gain { 818 audio_gain_mode_t mode; /* e.g. AUDIO_GAIN_MODE_JOINT */ 819 audio_channel_mask_t channel_mask; /* channels which gain an be controlled. 820 N/A if AUDIO_GAIN_MODE_CHANNELS is not supported */ 821 int min_value; /* minimum gain value in millibels */ 822 int max_value; /* maximum gain value in millibels */ 823 int default_value; /* default gain value in millibels */ 824 unsigned int step_value; /* gain step in millibels */ 825 unsigned int min_ramp_ms; /* minimum ramp duration in ms */ 826 unsigned int max_ramp_ms; /* maximum ramp duration in ms */ 827 }; 828 829 /* The gain configuration structure is used to get or set the gain values of a 830 * given port */ 831 struct audio_gain_config { 832 int index; /* index of the corresponding audio_gain in the 833 audio_port gains[] table */ 834 audio_gain_mode_t mode; /* mode requested for this command */ 835 audio_channel_mask_t channel_mask; /* channels which gain value follows. 836 N/A in joint mode */ 837 int values[sizeof(audio_channel_mask_t) * 8]; /* gain values in millibels 838 for each channel ordered from LSb to MSb in 839 channel mask. The number of values is 1 in joint 840 mode or popcount(channel_mask) */ 841 unsigned int ramp_duration_ms; /* ramp duration in ms */ 842 }; 843 844 /****************************** 845 * Routing control 846 *****************************/ 847 848 /* Types defined here are used to describe an audio source or sink at internal 849 * framework interfaces (audio policy, patch panel) or at the audio HAL. 850 * Sink and sources are grouped in a concept of audio port representing an 851 * audio end point at the edge of the system managed by the module exposing 852 * the interface. */ 853 854 /* Audio port role: either source or sink */ 855 typedef enum { 856 AUDIO_PORT_ROLE_NONE, 857 AUDIO_PORT_ROLE_SOURCE, 858 AUDIO_PORT_ROLE_SINK, 859 } audio_port_role_t; 860 861 /* Audio port type indicates if it is a session (e.g AudioTrack), 862 * a mix (e.g PlaybackThread output) or a physical device 863 * (e.g AUDIO_DEVICE_OUT_SPEAKER) */ 864 typedef enum { 865 AUDIO_PORT_TYPE_NONE, 866 AUDIO_PORT_TYPE_DEVICE, 867 AUDIO_PORT_TYPE_MIX, 868 AUDIO_PORT_TYPE_SESSION, 869 } audio_port_type_t; 870 871 /* Each port has a unique ID or handle allocated by policy manager */ 872 typedef int audio_port_handle_t; 873 #define AUDIO_PORT_HANDLE_NONE 0 874 875 876 /* maximum audio device address length */ 877 #define AUDIO_DEVICE_MAX_ADDRESS_LEN 32 878 879 /* extension for audio port configuration structure when the audio port is a 880 * hardware device */ 881 struct audio_port_config_device_ext { 882 audio_module_handle_t hw_module; /* module the device is attached to */ 883 audio_devices_t type; /* device type (e.g AUDIO_DEVICE_OUT_SPEAKER) */ 884 char address[AUDIO_DEVICE_MAX_ADDRESS_LEN]; /* device address. "" if N/A */ 885 }; 886 887 /* extension for audio port configuration structure when the audio port is a 888 * sub mix */ 889 struct audio_port_config_mix_ext { 890 audio_module_handle_t hw_module; /* module the stream is attached to */ 891 audio_io_handle_t handle; /* I/O handle of the input/output stream */ 892 union { 893 //TODO: change use case for output streams: use strategy and mixer attributes 894 audio_stream_type_t stream; 895 audio_source_t source; 896 } usecase; 897 }; 898 899 /* extension for audio port configuration structure when the audio port is an 900 * audio session */ 901 struct audio_port_config_session_ext { 902 audio_session_t session; /* audio session */ 903 }; 904 905 /* Flags indicating which fields are to be considered in struct audio_port_config */ 906 #define AUDIO_PORT_CONFIG_SAMPLE_RATE 0x1 907 #define AUDIO_PORT_CONFIG_CHANNEL_MASK 0x2 908 #define AUDIO_PORT_CONFIG_FORMAT 0x4 909 #define AUDIO_PORT_CONFIG_GAIN 0x8 910 #define AUDIO_PORT_CONFIG_ALL (AUDIO_PORT_CONFIG_SAMPLE_RATE | \ 911 AUDIO_PORT_CONFIG_CHANNEL_MASK | \ 912 AUDIO_PORT_CONFIG_FORMAT | \ 913 AUDIO_PORT_CONFIG_GAIN) 914 915 /* audio port configuration structure used to specify a particular configuration of 916 * an audio port */ 917 struct audio_port_config { 918 audio_port_handle_t id; /* port unique ID */ 919 audio_port_role_t role; /* sink or source */ 920 audio_port_type_t type; /* device, mix ... */ 921 unsigned int config_mask; /* e.g AUDIO_PORT_CONFIG_ALL */ 922 unsigned int sample_rate; /* sampling rate in Hz */ 923 audio_channel_mask_t channel_mask; /* channel mask if applicable */ 924 audio_format_t format; /* format if applicable */ 925 struct audio_gain_config gain; /* gain to apply if applicable */ 926 union { 927 struct audio_port_config_device_ext device; /* device specific info */ 928 struct audio_port_config_mix_ext mix; /* mix specific info */ 929 struct audio_port_config_session_ext session; /* session specific info */ 930 } ext; 931 }; 932 933 934 /* max number of sampling rates in audio port */ 935 #define AUDIO_PORT_MAX_SAMPLING_RATES 16 936 /* max number of channel masks in audio port */ 937 #define AUDIO_PORT_MAX_CHANNEL_MASKS 16 938 /* max number of audio formats in audio port */ 939 #define AUDIO_PORT_MAX_FORMATS 16 940 /* max number of gain controls in audio port */ 941 #define AUDIO_PORT_MAX_GAINS 16 942 943 /* extension for audio port structure when the audio port is a hardware device */ 944 struct audio_port_device_ext { 945 audio_module_handle_t hw_module; /* module the device is attached to */ 946 audio_devices_t type; /* device type (e.g AUDIO_DEVICE_OUT_SPEAKER) */ 947 char address[AUDIO_DEVICE_MAX_ADDRESS_LEN]; 948 }; 949 950 /* Latency class of the audio mix */ 951 typedef enum { 952 AUDIO_LATENCY_LOW, 953 AUDIO_LATENCY_NORMAL, 954 } audio_mix_latency_class_t; 955 956 /* extension for audio port structure when the audio port is a sub mix */ 957 struct audio_port_mix_ext { 958 audio_module_handle_t hw_module; /* module the stream is attached to */ 959 audio_io_handle_t handle; /* I/O handle of the input.output stream */ 960 audio_mix_latency_class_t latency_class; /* latency class */ 961 // other attributes: routing strategies 962 }; 963 964 /* extension for audio port structure when the audio port is an audio session */ 965 struct audio_port_session_ext { 966 audio_session_t session; /* audio session */ 967 }; 968 969 970 struct audio_port { 971 audio_port_handle_t id; /* port unique ID */ 972 audio_port_role_t role; /* sink or source */ 973 audio_port_type_t type; /* device, mix ... */ 974 unsigned int num_sample_rates; /* number of sampling rates in following array */ 975 unsigned int sample_rates[AUDIO_PORT_MAX_SAMPLING_RATES]; 976 unsigned int num_channel_masks; /* number of channel masks in following array */ 977 audio_channel_mask_t channel_masks[AUDIO_PORT_MAX_CHANNEL_MASKS]; 978 unsigned int num_formats; /* number of formats in following array */ 979 audio_format_t formats[AUDIO_PORT_MAX_FORMATS]; 980 unsigned int num_gains; /* number of gains in following array */ 981 struct audio_gain gains[AUDIO_PORT_MAX_GAINS]; 982 struct audio_port_config active_config; /* current audio port configuration */ 983 union { 984 struct audio_port_device_ext device; 985 struct audio_port_mix_ext mix; 986 struct audio_port_session_ext session; 987 } ext; 988 }; 989 990 /* An audio patch represents a connection between one or more source ports and 991 * one or more sink ports. Patches are connected and disconnected by audio policy manager or by 992 * applications via framework APIs. 993 * Each patch is identified by a handle at the interface used to create that patch. For instance, 994 * when a patch is created by the audio HAL, the HAL allocates and returns a handle. 995 * This handle is unique to a given audio HAL hardware module. 996 * But the same patch receives another system wide unique handle allocated by the framework. 997 * This unique handle is used for all transactions inside the framework. 998 */ 999 typedef int audio_patch_handle_t; 1000 #define AUDIO_PATCH_HANDLE_NONE 0 1001 1002 #define AUDIO_PATCH_PORTS_MAX 16 1003 1004 struct audio_patch { 1005 audio_patch_handle_t id; /* patch unique ID */ 1006 unsigned int num_sources; /* number of sources in following array */ 1007 struct audio_port_config sources[AUDIO_PATCH_PORTS_MAX]; 1008 unsigned int num_sinks; /* number of sinks in following array */ 1009 struct audio_port_config sinks[AUDIO_PATCH_PORTS_MAX]; 1010 }; 1011 1012 1013 1014 /* a HW synchronization source returned by the audio HAL */ 1015 typedef uint32_t audio_hw_sync_t; 1016 1017 /* an invalid HW synchronization source indicating an error */ 1018 #define AUDIO_HW_SYNC_INVALID 0 1019 1020 static inline bool audio_is_output_device(audio_devices_t device) 1021 { 1022 if (((device & AUDIO_DEVICE_BIT_IN) == 0) && 1023 (popcount(device) == 1) && ((device & ~AUDIO_DEVICE_OUT_ALL) == 0)) 1024 return true; 1025 else 1026 return false; 1027 } 1028 1029 static inline bool audio_is_input_device(audio_devices_t device) 1030 { 1031 if ((device & AUDIO_DEVICE_BIT_IN) != 0) { 1032 device &= ~AUDIO_DEVICE_BIT_IN; 1033 if ((popcount(device) == 1) && ((device & ~AUDIO_DEVICE_IN_ALL) == 0)) 1034 return true; 1035 } 1036 return false; 1037 } 1038 1039 static inline bool audio_is_output_devices(audio_devices_t device) 1040 { 1041 return (device & AUDIO_DEVICE_BIT_IN) == 0; 1042 } 1043 1044 static inline bool audio_is_a2dp_in_device(audio_devices_t device) 1045 { 1046 if ((device & AUDIO_DEVICE_BIT_IN) != 0) { 1047 device &= ~AUDIO_DEVICE_BIT_IN; 1048 if ((popcount(device) == 1) && (device & AUDIO_DEVICE_IN_BLUETOOTH_A2DP)) 1049 return true; 1050 } 1051 return false; 1052 } 1053 1054 static inline bool audio_is_a2dp_out_device(audio_devices_t device) 1055 { 1056 if ((popcount(device) == 1) && (device & AUDIO_DEVICE_OUT_ALL_A2DP)) 1057 return true; 1058 else 1059 return false; 1060 } 1061 1062 // Deprecated - use audio_is_a2dp_out_device() instead 1063 static inline bool audio_is_a2dp_device(audio_devices_t device) 1064 { 1065 return audio_is_a2dp_out_device(device); 1066 } 1067 1068 static inline bool audio_is_bluetooth_sco_device(audio_devices_t device) 1069 { 1070 if ((device & AUDIO_DEVICE_BIT_IN) == 0) { 1071 if ((popcount(device) == 1) && ((device & ~AUDIO_DEVICE_OUT_ALL_SCO) == 0)) 1072 return true; 1073 } else { 1074 device &= ~AUDIO_DEVICE_BIT_IN; 1075 if ((popcount(device) == 1) && ((device & ~AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) == 0)) 1076 return true; 1077 } 1078 1079 return false; 1080 } 1081 1082 static inline bool audio_is_usb_out_device(audio_devices_t device) 1083 { 1084 return ((popcount(device) == 1) && (device & AUDIO_DEVICE_OUT_ALL_USB)); 1085 } 1086 1087 static inline bool audio_is_usb_in_device(audio_devices_t device) 1088 { 1089 if ((device & AUDIO_DEVICE_BIT_IN) != 0) { 1090 device &= ~AUDIO_DEVICE_BIT_IN; 1091 if (popcount(device) == 1 && (device & AUDIO_DEVICE_IN_ALL_USB) != 0) 1092 return true; 1093 } 1094 return false; 1095 } 1096 1097 /* OBSOLETE - use audio_is_usb_out_device() instead. */ 1098 static inline bool audio_is_usb_device(audio_devices_t device) 1099 { 1100 return audio_is_usb_out_device(device); 1101 } 1102 1103 static inline bool audio_is_remote_submix_device(audio_devices_t device) 1104 { 1105 if ((device & AUDIO_DEVICE_OUT_REMOTE_SUBMIX) == AUDIO_DEVICE_OUT_REMOTE_SUBMIX 1106 || (device & AUDIO_DEVICE_IN_REMOTE_SUBMIX) == AUDIO_DEVICE_IN_REMOTE_SUBMIX) 1107 return true; 1108 else 1109 return false; 1110 } 1111 1112 /* Returns true if: 1113 * representation is valid, and 1114 * there is at least one channel bit set which _could_ correspond to an input channel, and 1115 * there are no channel bits set which could _not_ correspond to an input channel. 1116 * Otherwise returns false. 1117 */ 1118 static inline bool audio_is_input_channel(audio_channel_mask_t channel) 1119 { 1120 uint32_t bits = audio_channel_mask_get_bits(channel); 1121 switch (audio_channel_mask_get_representation(channel)) { 1122 case AUDIO_CHANNEL_REPRESENTATION_POSITION: 1123 if (bits & ~AUDIO_CHANNEL_IN_ALL) { 1124 bits = 0; 1125 } 1126 // fall through 1127 case AUDIO_CHANNEL_REPRESENTATION_INDEX: 1128 return bits != 0; 1129 default: 1130 return false; 1131 } 1132 } 1133 1134 /* Returns true if: 1135 * representation is valid, and 1136 * there is at least one channel bit set which _could_ correspond to an output channel, and 1137 * there are no channel bits set which could _not_ correspond to an output channel. 1138 * Otherwise returns false. 1139 */ 1140 static inline bool audio_is_output_channel(audio_channel_mask_t channel) 1141 { 1142 uint32_t bits = audio_channel_mask_get_bits(channel); 1143 switch (audio_channel_mask_get_representation(channel)) { 1144 case AUDIO_CHANNEL_REPRESENTATION_POSITION: 1145 if (bits & ~AUDIO_CHANNEL_OUT_ALL) { 1146 bits = 0; 1147 } 1148 // fall through 1149 case AUDIO_CHANNEL_REPRESENTATION_INDEX: 1150 return bits != 0; 1151 default: 1152 return false; 1153 } 1154 } 1155 1156 /* Returns the number of channels from an input channel mask, 1157 * used in the context of audio input or recording. 1158 * If a channel bit is set which could _not_ correspond to an input channel, 1159 * it is excluded from the count. 1160 * Returns zero if the representation is invalid. 1161 */ 1162 static inline uint32_t audio_channel_count_from_in_mask(audio_channel_mask_t channel) 1163 { 1164 uint32_t bits = audio_channel_mask_get_bits(channel); 1165 switch (audio_channel_mask_get_representation(channel)) { 1166 case AUDIO_CHANNEL_REPRESENTATION_POSITION: 1167 // TODO: We can now merge with from_out_mask and remove anding 1168 bits &= AUDIO_CHANNEL_IN_ALL; 1169 // fall through 1170 case AUDIO_CHANNEL_REPRESENTATION_INDEX: 1171 return popcount(bits); 1172 default: 1173 return 0; 1174 } 1175 } 1176 1177 /* Returns the number of channels from an output channel mask, 1178 * used in the context of audio output or playback. 1179 * If a channel bit is set which could _not_ correspond to an output channel, 1180 * it is excluded from the count. 1181 * Returns zero if the representation is invalid. 1182 */ 1183 static inline uint32_t audio_channel_count_from_out_mask(audio_channel_mask_t channel) 1184 { 1185 uint32_t bits = audio_channel_mask_get_bits(channel); 1186 switch (audio_channel_mask_get_representation(channel)) { 1187 case AUDIO_CHANNEL_REPRESENTATION_POSITION: 1188 // TODO: We can now merge with from_in_mask and remove anding 1189 bits &= AUDIO_CHANNEL_OUT_ALL; 1190 // fall through 1191 case AUDIO_CHANNEL_REPRESENTATION_INDEX: 1192 return popcount(bits); 1193 default: 1194 return 0; 1195 } 1196 } 1197 1198 /* Derive an output channel mask for position assignment from a channel count. 1199 * This is to be used when the content channel mask is unknown. The 1, 2, 4, 5, 6, 7 and 8 channel 1200 * cases are mapped to the standard game/home-theater layouts, but note that 4 is mapped to quad, 1201 * and not stereo + FC + mono surround. A channel count of 3 is arbitrarily mapped to stereo + FC 1202 * for continuity with stereo. 1203 * Returns the matching channel mask, 1204 * or AUDIO_CHANNEL_NONE if the channel count is zero, 1205 * or AUDIO_CHANNEL_INVALID if the channel count exceeds that of the 1206 * configurations for which a default output channel mask is defined. 1207 */ 1208 static inline audio_channel_mask_t audio_channel_out_mask_from_count(uint32_t channel_count) 1209 { 1210 uint32_t bits; 1211 switch (channel_count) { 1212 case 0: 1213 return AUDIO_CHANNEL_NONE; 1214 case 1: 1215 bits = AUDIO_CHANNEL_OUT_MONO; 1216 break; 1217 case 2: 1218 bits = AUDIO_CHANNEL_OUT_STEREO; 1219 break; 1220 case 3: 1221 bits = AUDIO_CHANNEL_OUT_STEREO | AUDIO_CHANNEL_OUT_FRONT_CENTER; 1222 break; 1223 case 4: // 4.0 1224 bits = AUDIO_CHANNEL_OUT_QUAD; 1225 break; 1226 case 5: // 5.0 1227 bits = AUDIO_CHANNEL_OUT_QUAD | AUDIO_CHANNEL_OUT_FRONT_CENTER; 1228 break; 1229 case 6: // 5.1 1230 bits = AUDIO_CHANNEL_OUT_5POINT1; 1231 break; 1232 case 7: // 6.1 1233 bits = AUDIO_CHANNEL_OUT_5POINT1 | AUDIO_CHANNEL_OUT_BACK_CENTER; 1234 break; 1235 case 8: 1236 bits = AUDIO_CHANNEL_OUT_7POINT1; 1237 break; 1238 default: 1239 return AUDIO_CHANNEL_INVALID; 1240 } 1241 return audio_channel_mask_from_representation_and_bits( 1242 AUDIO_CHANNEL_REPRESENTATION_POSITION, bits); 1243 } 1244 1245 /* Derive an input channel mask for position assignment from a channel count. 1246 * Currently handles only mono and stereo. 1247 * Returns the matching channel mask, 1248 * or AUDIO_CHANNEL_NONE if the channel count is zero, 1249 * or AUDIO_CHANNEL_INVALID if the channel count exceeds that of the 1250 * configurations for which a default input channel mask is defined. 1251 */ 1252 static inline audio_channel_mask_t audio_channel_in_mask_from_count(uint32_t channel_count) 1253 { 1254 uint32_t bits; 1255 switch (channel_count) { 1256 case 0: 1257 return AUDIO_CHANNEL_NONE; 1258 case 1: 1259 bits = AUDIO_CHANNEL_IN_MONO; 1260 break; 1261 case 2: 1262 bits = AUDIO_CHANNEL_IN_STEREO; 1263 break; 1264 default: 1265 return AUDIO_CHANNEL_INVALID; 1266 } 1267 return audio_channel_mask_from_representation_and_bits( 1268 AUDIO_CHANNEL_REPRESENTATION_POSITION, bits); 1269 } 1270 1271 /* Derive a channel mask for index assignment from a channel count. 1272 * Returns the matching channel mask, 1273 * or AUDIO_CHANNEL_NONE if the channel count is zero, 1274 * or AUDIO_CHANNEL_INVALID if the channel count exceeds AUDIO_CHANNEL_COUNT_MAX. 1275 */ 1276 static inline audio_channel_mask_t audio_channel_mask_for_index_assignment_from_count( 1277 uint32_t channel_count) 1278 { 1279 if (channel_count == 0) { 1280 return AUDIO_CHANNEL_NONE; 1281 } 1282 if (channel_count > AUDIO_CHANNEL_COUNT_MAX) { 1283 return AUDIO_CHANNEL_INVALID; 1284 } 1285 uint32_t bits = (1 << channel_count) - 1; 1286 return audio_channel_mask_from_representation_and_bits( 1287 AUDIO_CHANNEL_REPRESENTATION_INDEX, bits); 1288 } 1289 1290 static inline bool audio_is_valid_format(audio_format_t format) 1291 { 1292 switch (format & AUDIO_FORMAT_MAIN_MASK) { 1293 case AUDIO_FORMAT_PCM: 1294 switch (format) { 1295 case AUDIO_FORMAT_PCM_16_BIT: 1296 case AUDIO_FORMAT_PCM_8_BIT: 1297 case AUDIO_FORMAT_PCM_32_BIT: 1298 case AUDIO_FORMAT_PCM_8_24_BIT: 1299 case AUDIO_FORMAT_PCM_FLOAT: 1300 case AUDIO_FORMAT_PCM_24_BIT_PACKED: 1301 return true; 1302 default: 1303 return false; 1304 } 1305 /* not reached */ 1306 case AUDIO_FORMAT_MP3: 1307 case AUDIO_FORMAT_AMR_NB: 1308 case AUDIO_FORMAT_AMR_WB: 1309 case AUDIO_FORMAT_AAC: 1310 case AUDIO_FORMAT_HE_AAC_V1: 1311 case AUDIO_FORMAT_HE_AAC_V2: 1312 case AUDIO_FORMAT_VORBIS: 1313 case AUDIO_FORMAT_OPUS: 1314 case AUDIO_FORMAT_AC3: 1315 case AUDIO_FORMAT_E_AC3: 1316 return true; 1317 default: 1318 return false; 1319 } 1320 } 1321 1322 static inline bool audio_is_linear_pcm(audio_format_t format) 1323 { 1324 return ((format & AUDIO_FORMAT_MAIN_MASK) == AUDIO_FORMAT_PCM); 1325 } 1326 1327 static inline size_t audio_bytes_per_sample(audio_format_t format) 1328 { 1329 size_t size = 0; 1330 1331 switch (format) { 1332 case AUDIO_FORMAT_PCM_32_BIT: 1333 case AUDIO_FORMAT_PCM_8_24_BIT: 1334 size = sizeof(int32_t); 1335 break; 1336 case AUDIO_FORMAT_PCM_24_BIT_PACKED: 1337 size = sizeof(uint8_t) * 3; 1338 break; 1339 case AUDIO_FORMAT_PCM_16_BIT: 1340 size = sizeof(int16_t); 1341 break; 1342 case AUDIO_FORMAT_PCM_8_BIT: 1343 size = sizeof(uint8_t); 1344 break; 1345 case AUDIO_FORMAT_PCM_FLOAT: 1346 size = sizeof(float); 1347 break; 1348 default: 1349 break; 1350 } 1351 return size; 1352 } 1353 1354 /* converts device address to string sent to audio HAL via set_parameters */ 1355 static char *audio_device_address_to_parameter(audio_devices_t device, const char *address) 1356 { 1357 const size_t kSize = AUDIO_DEVICE_MAX_ADDRESS_LEN + sizeof("a2dp_sink_address="); 1358 char param[kSize]; 1359 1360 if (device & AUDIO_DEVICE_OUT_ALL_A2DP) 1361 snprintf(param, kSize, "%s=%s", "a2dp_sink_address", address); 1362 else if (device & AUDIO_DEVICE_OUT_REMOTE_SUBMIX) 1363 snprintf(param, kSize, "%s=%s", "mix", address); 1364 else 1365 snprintf(param, kSize, "%s", address); 1366 1367 return strdup(param); 1368 } 1369 1370 1371 __END_DECLS 1372 1373 #endif // ANDROID_AUDIO_CORE_H 1374
