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_EFFECT_H 19 #define ANDROID_AUDIO_EFFECT_H 20 21 #include <errno.h> 22 #include <stdint.h> 23 #include <strings.h> 24 #include <sys/cdefs.h> 25 #include <sys/types.h> 26 27 #include <cutils/bitops.h> 28 29 #include <system/audio.h> 30 31 32 __BEGIN_DECLS 33 34 35 ///////////////////////////////////////////////// 36 // Common Definitions 37 ///////////////////////////////////////////////// 38 39 // 40 //--- Effect descriptor structure effect_descriptor_t 41 // 42 43 // Unique effect ID (can be generated from the following site: 44 // http://www.itu.int/ITU-T/asn1/uuid.html) 45 // This format is used for both "type" and "uuid" fields of the effect descriptor structure. 46 // - When used for effect type and the engine is implementing and effect corresponding to a standard 47 // OpenSL ES interface, this ID must be the one defined in OpenSLES_IID.h for that interface. 48 // - When used as uuid, it should be a unique UUID for this particular implementation. 49 typedef struct effect_uuid_s { 50 uint32_t timeLow; 51 uint16_t timeMid; 52 uint16_t timeHiAndVersion; 53 uint16_t clockSeq; 54 uint8_t node[6]; 55 } effect_uuid_t; 56 57 // Maximum length of character strings in structures defines by this API. 58 #define EFFECT_STRING_LEN_MAX 64 59 60 // NULL UUID definition (matches SL_IID_NULL_) 61 #define EFFECT_UUID_INITIALIZER { 0xec7178ec, 0xe5e1, 0x4432, 0xa3f4, \ 62 { 0x46, 0x57, 0xe6, 0x79, 0x52, 0x10 } } 63 static const effect_uuid_t EFFECT_UUID_NULL_ = EFFECT_UUID_INITIALIZER; 64 static const effect_uuid_t * const EFFECT_UUID_NULL = &EFFECT_UUID_NULL_; 65 static const char * const EFFECT_UUID_NULL_STR = "ec7178ec-e5e1-4432-a3f4-4657e6795210"; 66 67 68 // The effect descriptor contains necessary information to facilitate the enumeration of the effect 69 // engines present in a library. 70 typedef struct effect_descriptor_s { 71 effect_uuid_t type; // UUID of to the OpenSL ES interface implemented by this effect 72 effect_uuid_t uuid; // UUID for this particular implementation 73 uint32_t apiVersion; // Version of the effect control API implemented 74 uint32_t flags; // effect engine capabilities/requirements flags (see below) 75 uint16_t cpuLoad; // CPU load indication (see below) 76 uint16_t memoryUsage; // Data Memory usage (see below) 77 char name[EFFECT_STRING_LEN_MAX]; // human readable effect name 78 char implementor[EFFECT_STRING_LEN_MAX]; // human readable effect implementor name 79 } effect_descriptor_t; 80 81 // CPU load and memory usage indication: each effect implementation must provide an indication of 82 // its CPU and memory usage for the audio effect framework to limit the number of effects 83 // instantiated at a given time on a given platform. 84 // The CPU load is expressed in 0.1 MIPS units as estimated on an ARM9E core (ARMv5TE) with 0 WS. 85 // The memory usage is expressed in KB and includes only dynamically allocated memory 86 87 // Definitions for flags field of effect descriptor. 88 // +---------------------------+-----------+----------------------------------- 89 // | description | bits | values 90 // +---------------------------+-----------+----------------------------------- 91 // | connection mode | 0..2 | 0 insert: after track process 92 // | | | 1 auxiliary: connect to track auxiliary 93 // | | | output and use send level 94 // | | | 2 replace: replaces track process function; 95 // | | | must implement SRC, volume and mono to stereo. 96 // | | | 3 pre processing: applied below audio HAL on input 97 // | | | 4 post processing: applied below audio HAL on output 98 // | | | 5 - 7 reserved 99 // +---------------------------+-----------+----------------------------------- 100 // | insertion preference | 3..5 | 0 none 101 // | | | 1 first of the chain 102 // | | | 2 last of the chain 103 // | | | 3 exclusive (only effect in the insert chain) 104 // | | | 4..7 reserved 105 // +---------------------------+-----------+----------------------------------- 106 // | Volume management | 6..8 | 0 none 107 // | | | 1 implements volume control 108 // | | | 2 requires volume indication 109 // | | | 4 reserved 110 // +---------------------------+-----------+----------------------------------- 111 // | Device indication | 9..11 | 0 none 112 // | | | 1 requires device updates 113 // | | | 2, 4 reserved 114 // +---------------------------+-----------+----------------------------------- 115 // | Sample input mode | 12..13 | 1 direct: process() function or EFFECT_CMD_SET_CONFIG 116 // | | | command must specify a buffer descriptor 117 // | | | 2 provider: process() function uses the 118 // | | | bufferProvider indicated by the 119 // | | | EFFECT_CMD_SET_CONFIG command to request input. 120 // | | | buffers. 121 // | | | 3 both: both input modes are supported 122 // +---------------------------+-----------+----------------------------------- 123 // | Sample output mode | 14..15 | 1 direct: process() function or EFFECT_CMD_SET_CONFIG 124 // | | | command must specify a buffer descriptor 125 // | | | 2 provider: process() function uses the 126 // | | | bufferProvider indicated by the 127 // | | | EFFECT_CMD_SET_CONFIG command to request output 128 // | | | buffers. 129 // | | | 3 both: both output modes are supported 130 // +---------------------------+-----------+----------------------------------- 131 // | Hardware acceleration | 16..17 | 0 No hardware acceleration 132 // | | | 1 non tunneled hw acceleration: the process() function 133 // | | | reads the samples, send them to HW accelerated 134 // | | | effect processor, reads back the processed samples 135 // | | | and returns them to the output buffer. 136 // | | | 2 tunneled hw acceleration: the process() function is 137 // | | | transparent. The effect interface is only used to 138 // | | | control the effect engine. This mode is relevant for 139 // | | | global effects actually applied by the audio 140 // | | | hardware on the output stream. 141 // +---------------------------+-----------+----------------------------------- 142 // | Audio Mode indication | 18..19 | 0 none 143 // | | | 1 requires audio mode updates 144 // | | | 2..3 reserved 145 // +---------------------------+-----------+----------------------------------- 146 // | Audio source indication | 20..21 | 0 none 147 // | | | 1 requires audio source updates 148 // | | | 2..3 reserved 149 // +---------------------------+-----------+----------------------------------- 150 // | Effect offload supported | 22 | 0 The effect cannot be offloaded to an audio DSP 151 // | | | 1 The effect can be offloaded to an audio DSP 152 // +---------------------------+-----------+----------------------------------- 153 154 // Insert mode 155 #define EFFECT_FLAG_TYPE_SHIFT 0 156 #define EFFECT_FLAG_TYPE_SIZE 3 157 #define EFFECT_FLAG_TYPE_MASK (((1 << EFFECT_FLAG_TYPE_SIZE) -1) \ 158 << EFFECT_FLAG_TYPE_SHIFT) 159 #define EFFECT_FLAG_TYPE_INSERT (0 << EFFECT_FLAG_TYPE_SHIFT) 160 #define EFFECT_FLAG_TYPE_AUXILIARY (1 << EFFECT_FLAG_TYPE_SHIFT) 161 #define EFFECT_FLAG_TYPE_REPLACE (2 << EFFECT_FLAG_TYPE_SHIFT) 162 #define EFFECT_FLAG_TYPE_PRE_PROC (3 << EFFECT_FLAG_TYPE_SHIFT) 163 #define EFFECT_FLAG_TYPE_POST_PROC (4 << EFFECT_FLAG_TYPE_SHIFT) 164 165 // Insert preference 166 #define EFFECT_FLAG_INSERT_SHIFT (EFFECT_FLAG_TYPE_SHIFT + EFFECT_FLAG_TYPE_SIZE) 167 #define EFFECT_FLAG_INSERT_SIZE 3 168 #define EFFECT_FLAG_INSERT_MASK (((1 << EFFECT_FLAG_INSERT_SIZE) -1) \ 169 << EFFECT_FLAG_INSERT_SHIFT) 170 #define EFFECT_FLAG_INSERT_ANY (0 << EFFECT_FLAG_INSERT_SHIFT) 171 #define EFFECT_FLAG_INSERT_FIRST (1 << EFFECT_FLAG_INSERT_SHIFT) 172 #define EFFECT_FLAG_INSERT_LAST (2 << EFFECT_FLAG_INSERT_SHIFT) 173 #define EFFECT_FLAG_INSERT_EXCLUSIVE (3 << EFFECT_FLAG_INSERT_SHIFT) 174 175 176 // Volume control 177 #define EFFECT_FLAG_VOLUME_SHIFT (EFFECT_FLAG_INSERT_SHIFT + EFFECT_FLAG_INSERT_SIZE) 178 #define EFFECT_FLAG_VOLUME_SIZE 3 179 #define EFFECT_FLAG_VOLUME_MASK (((1 << EFFECT_FLAG_VOLUME_SIZE) -1) \ 180 << EFFECT_FLAG_VOLUME_SHIFT) 181 #define EFFECT_FLAG_VOLUME_CTRL (1 << EFFECT_FLAG_VOLUME_SHIFT) 182 #define EFFECT_FLAG_VOLUME_IND (2 << EFFECT_FLAG_VOLUME_SHIFT) 183 #define EFFECT_FLAG_VOLUME_NONE (0 << EFFECT_FLAG_VOLUME_SHIFT) 184 185 // Device indication 186 #define EFFECT_FLAG_DEVICE_SHIFT (EFFECT_FLAG_VOLUME_SHIFT + EFFECT_FLAG_VOLUME_SIZE) 187 #define EFFECT_FLAG_DEVICE_SIZE 3 188 #define EFFECT_FLAG_DEVICE_MASK (((1 << EFFECT_FLAG_DEVICE_SIZE) -1) \ 189 << EFFECT_FLAG_DEVICE_SHIFT) 190 #define EFFECT_FLAG_DEVICE_IND (1 << EFFECT_FLAG_DEVICE_SHIFT) 191 #define EFFECT_FLAG_DEVICE_NONE (0 << EFFECT_FLAG_DEVICE_SHIFT) 192 193 // Sample input modes 194 #define EFFECT_FLAG_INPUT_SHIFT (EFFECT_FLAG_DEVICE_SHIFT + EFFECT_FLAG_DEVICE_SIZE) 195 #define EFFECT_FLAG_INPUT_SIZE 2 196 #define EFFECT_FLAG_INPUT_MASK (((1 << EFFECT_FLAG_INPUT_SIZE) -1) \ 197 << EFFECT_FLAG_INPUT_SHIFT) 198 #define EFFECT_FLAG_INPUT_DIRECT (1 << EFFECT_FLAG_INPUT_SHIFT) 199 #define EFFECT_FLAG_INPUT_PROVIDER (2 << EFFECT_FLAG_INPUT_SHIFT) 200 #define EFFECT_FLAG_INPUT_BOTH (3 << EFFECT_FLAG_INPUT_SHIFT) 201 202 // Sample output modes 203 #define EFFECT_FLAG_OUTPUT_SHIFT (EFFECT_FLAG_INPUT_SHIFT + EFFECT_FLAG_INPUT_SIZE) 204 #define EFFECT_FLAG_OUTPUT_SIZE 2 205 #define EFFECT_FLAG_OUTPUT_MASK (((1 << EFFECT_FLAG_OUTPUT_SIZE) -1) \ 206 << EFFECT_FLAG_OUTPUT_SHIFT) 207 #define EFFECT_FLAG_OUTPUT_DIRECT (1 << EFFECT_FLAG_OUTPUT_SHIFT) 208 #define EFFECT_FLAG_OUTPUT_PROVIDER (2 << EFFECT_FLAG_OUTPUT_SHIFT) 209 #define EFFECT_FLAG_OUTPUT_BOTH (3 << EFFECT_FLAG_OUTPUT_SHIFT) 210 211 // Hardware acceleration mode 212 #define EFFECT_FLAG_HW_ACC_SHIFT (EFFECT_FLAG_OUTPUT_SHIFT + EFFECT_FLAG_OUTPUT_SIZE) 213 #define EFFECT_FLAG_HW_ACC_SIZE 2 214 #define EFFECT_FLAG_HW_ACC_MASK (((1 << EFFECT_FLAG_HW_ACC_SIZE) -1) \ 215 << EFFECT_FLAG_HW_ACC_SHIFT) 216 #define EFFECT_FLAG_HW_ACC_SIMPLE (1 << EFFECT_FLAG_HW_ACC_SHIFT) 217 #define EFFECT_FLAG_HW_ACC_TUNNEL (2 << EFFECT_FLAG_HW_ACC_SHIFT) 218 219 // Audio mode indication 220 #define EFFECT_FLAG_AUDIO_MODE_SHIFT (EFFECT_FLAG_HW_ACC_SHIFT + EFFECT_FLAG_HW_ACC_SIZE) 221 #define EFFECT_FLAG_AUDIO_MODE_SIZE 2 222 #define EFFECT_FLAG_AUDIO_MODE_MASK (((1 << EFFECT_FLAG_AUDIO_MODE_SIZE) -1) \ 223 << EFFECT_FLAG_AUDIO_MODE_SHIFT) 224 #define EFFECT_FLAG_AUDIO_MODE_IND (1 << EFFECT_FLAG_AUDIO_MODE_SHIFT) 225 #define EFFECT_FLAG_AUDIO_MODE_NONE (0 << EFFECT_FLAG_AUDIO_MODE_SHIFT) 226 227 // Audio source indication 228 #define EFFECT_FLAG_AUDIO_SOURCE_SHIFT (EFFECT_FLAG_AUDIO_MODE_SHIFT + EFFECT_FLAG_AUDIO_MODE_SIZE) 229 #define EFFECT_FLAG_AUDIO_SOURCE_SIZE 2 230 #define EFFECT_FLAG_AUDIO_SOURCE_MASK (((1 << EFFECT_FLAG_AUDIO_SOURCE_SIZE) -1) \ 231 << EFFECT_FLAG_AUDIO_SOURCE_SHIFT) 232 #define EFFECT_FLAG_AUDIO_SOURCE_IND (1 << EFFECT_FLAG_AUDIO_SOURCE_SHIFT) 233 #define EFFECT_FLAG_AUDIO_SOURCE_NONE (0 << EFFECT_FLAG_AUDIO_SOURCE_SHIFT) 234 235 // Effect offload indication 236 #define EFFECT_FLAG_OFFLOAD_SHIFT (EFFECT_FLAG_AUDIO_SOURCE_SHIFT + \ 237 EFFECT_FLAG_AUDIO_SOURCE_SIZE) 238 #define EFFECT_FLAG_OFFLOAD_SIZE 1 239 #define EFFECT_FLAG_OFFLOAD_MASK (((1 << EFFECT_FLAG_OFFLOAD_SIZE) -1) \ 240 << EFFECT_FLAG_OFFLOAD_SHIFT) 241 #define EFFECT_FLAG_OFFLOAD_SUPPORTED (1 << EFFECT_FLAG_OFFLOAD_SHIFT) 242 243 #define EFFECT_MAKE_API_VERSION(M, m) (((M)<<16) | ((m) & 0xFFFF)) 244 #define EFFECT_API_VERSION_MAJOR(v) ((v)>>16) 245 #define EFFECT_API_VERSION_MINOR(v) ((m) & 0xFFFF) 246 247 248 249 ///////////////////////////////////////////////// 250 // Effect control interface 251 ///////////////////////////////////////////////// 252 253 // Effect control interface version 2.0 254 #define EFFECT_CONTROL_API_VERSION EFFECT_MAKE_API_VERSION(2,0) 255 256 // Effect control interface structure: effect_interface_s 257 // The effect control interface is exposed by each effect engine implementation. It consists of 258 // a set of functions controlling the configuration, activation and process of the engine. 259 // The functions are grouped in a structure of type effect_interface_s. 260 // 261 // Effect control interface handle: effect_handle_t 262 // The effect_handle_t serves two purposes regarding the implementation of the effect engine: 263 // - 1 it is the address of a pointer to an effect_interface_s structure where the functions 264 // of the effect control API for a particular effect are located. 265 // - 2 it is the address of the context of a particular effect instance. 266 // A typical implementation in the effect library would define a structure as follows: 267 // struct effect_module_s { 268 // const struct effect_interface_s *itfe; 269 // effect_config_t config; 270 // effect_context_t context; 271 // } 272 // The implementation of EffectCreate() function would then allocate a structure of this 273 // type and return its address as effect_handle_t 274 typedef struct effect_interface_s **effect_handle_t; 275 276 277 // Forward definition of type audio_buffer_t 278 typedef struct audio_buffer_s audio_buffer_t; 279 280 281 282 283 284 285 // Effect control interface definition 286 struct effect_interface_s { 287 //////////////////////////////////////////////////////////////////////////////// 288 // 289 // Function: process 290 // 291 // Description: Effect process function. Takes input samples as specified 292 // (count and location) in input buffer descriptor and output processed 293 // samples as specified in output buffer descriptor. If the buffer descriptor 294 // is not specified the function must use either the buffer or the 295 // buffer provider function installed by the EFFECT_CMD_SET_CONFIG command. 296 // The effect framework will call the process() function after the EFFECT_CMD_ENABLE 297 // command is received and until the EFFECT_CMD_DISABLE is received. When the engine 298 // receives the EFFECT_CMD_DISABLE command it should turn off the effect gracefully 299 // and when done indicate that it is OK to stop calling the process() function by 300 // returning the -ENODATA status. 301 // 302 // NOTE: the process() function implementation should be "real-time safe" that is 303 // it should not perform blocking calls: malloc/free, sleep, read/write/open/close, 304 // pthread_cond_wait/pthread_mutex_lock... 305 // 306 // Input: 307 // self: handle to the effect interface this function 308 // is called on. 309 // inBuffer: buffer descriptor indicating where to read samples to process. 310 // If NULL, use the configuration passed by EFFECT_CMD_SET_CONFIG command. 311 // 312 // outBuffer: buffer descriptor indicating where to write processed samples. 313 // If NULL, use the configuration passed by EFFECT_CMD_SET_CONFIG command. 314 // 315 // Output: 316 // returned value: 0 successful operation 317 // -ENODATA the engine has finished the disable phase and the framework 318 // can stop calling process() 319 // -EINVAL invalid interface handle or 320 // invalid input/output buffer description 321 //////////////////////////////////////////////////////////////////////////////// 322 int32_t (*process)(effect_handle_t self, 323 audio_buffer_t *inBuffer, 324 audio_buffer_t *outBuffer); 325 //////////////////////////////////////////////////////////////////////////////// 326 // 327 // Function: command 328 // 329 // Description: Send a command and receive a response to/from effect engine. 330 // 331 // Input: 332 // self: handle to the effect interface this function 333 // is called on. 334 // cmdCode: command code: the command can be a standardized command defined in 335 // effect_command_e (see below) or a proprietary command. 336 // cmdSize: size of command in bytes 337 // pCmdData: pointer to command data 338 // pReplyData: pointer to reply data 339 // 340 // Input/Output: 341 // replySize: maximum size of reply data as input 342 // actual size of reply data as output 343 // 344 // Output: 345 // returned value: 0 successful operation 346 // -EINVAL invalid interface handle or 347 // invalid command/reply size or format according to 348 // command code 349 // The return code should be restricted to indicate problems related to this API 350 // specification. Status related to the execution of a particular command should be 351 // indicated as part of the reply field. 352 // 353 // *pReplyData updated with command response 354 // 355 //////////////////////////////////////////////////////////////////////////////// 356 int32_t (*command)(effect_handle_t self, 357 uint32_t cmdCode, 358 uint32_t cmdSize, 359 void *pCmdData, 360 uint32_t *replySize, 361 void *pReplyData); 362 //////////////////////////////////////////////////////////////////////////////// 363 // 364 // Function: get_descriptor 365 // 366 // Description: Returns the effect descriptor 367 // 368 // Input: 369 // self: handle to the effect interface this function 370 // is called on. 371 // 372 // Input/Output: 373 // pDescriptor: address where to return the effect descriptor. 374 // 375 // Output: 376 // returned value: 0 successful operation. 377 // -EINVAL invalid interface handle or invalid pDescriptor 378 // *pDescriptor: updated with the effect descriptor. 379 // 380 //////////////////////////////////////////////////////////////////////////////// 381 int32_t (*get_descriptor)(effect_handle_t self, 382 effect_descriptor_t *pDescriptor); 383 //////////////////////////////////////////////////////////////////////////////// 384 // 385 // Function: process_reverse 386 // 387 // Description: Process reverse stream function. This function is used to pass 388 // a reference stream to the effect engine. If the engine does not need a reference 389 // stream, this function pointer can be set to NULL. 390 // This function would typically implemented by an Echo Canceler. 391 // 392 // Input: 393 // self: handle to the effect interface this function 394 // is called on. 395 // inBuffer: buffer descriptor indicating where to read samples to process. 396 // If NULL, use the configuration passed by EFFECT_CMD_SET_CONFIG_REVERSE command. 397 // 398 // outBuffer: buffer descriptor indicating where to write processed samples. 399 // If NULL, use the configuration passed by EFFECT_CMD_SET_CONFIG_REVERSE command. 400 // If the buffer and buffer provider in the configuration received by 401 // EFFECT_CMD_SET_CONFIG_REVERSE are also NULL, do not return modified reverse 402 // stream data 403 // 404 // Output: 405 // returned value: 0 successful operation 406 // -ENODATA the engine has finished the disable phase and the framework 407 // can stop calling process_reverse() 408 // -EINVAL invalid interface handle or 409 // invalid input/output buffer description 410 //////////////////////////////////////////////////////////////////////////////// 411 int32_t (*process_reverse)(effect_handle_t self, 412 audio_buffer_t *inBuffer, 413 audio_buffer_t *outBuffer); 414 }; 415 416 417 // 418 //--- Standardized command codes for command() function 419 // 420 enum effect_command_e { 421 EFFECT_CMD_INIT, // initialize effect engine 422 EFFECT_CMD_SET_CONFIG, // configure effect engine (see effect_config_t) 423 EFFECT_CMD_RESET, // reset effect engine 424 EFFECT_CMD_ENABLE, // enable effect process 425 EFFECT_CMD_DISABLE, // disable effect process 426 EFFECT_CMD_SET_PARAM, // set parameter immediately (see effect_param_t) 427 EFFECT_CMD_SET_PARAM_DEFERRED, // set parameter deferred 428 EFFECT_CMD_SET_PARAM_COMMIT, // commit previous set parameter deferred 429 EFFECT_CMD_GET_PARAM, // get parameter 430 EFFECT_CMD_SET_DEVICE, // set audio device (see audio.h, audio_devices_t) 431 EFFECT_CMD_SET_VOLUME, // set volume 432 EFFECT_CMD_SET_AUDIO_MODE, // set the audio mode (normal, ring, ...) 433 EFFECT_CMD_SET_CONFIG_REVERSE, // configure effect engine reverse stream(see effect_config_t) 434 EFFECT_CMD_SET_INPUT_DEVICE, // set capture device (see audio.h, audio_devices_t) 435 EFFECT_CMD_GET_CONFIG, // read effect engine configuration 436 EFFECT_CMD_GET_CONFIG_REVERSE, // read configure effect engine reverse stream configuration 437 EFFECT_CMD_GET_FEATURE_SUPPORTED_CONFIGS,// get all supported configurations for a feature. 438 EFFECT_CMD_GET_FEATURE_CONFIG, // get current feature configuration 439 EFFECT_CMD_SET_FEATURE_CONFIG, // set current feature configuration 440 EFFECT_CMD_SET_AUDIO_SOURCE, // set the audio source (see audio.h, audio_source_t) 441 EFFECT_CMD_OFFLOAD, // set if effect thread is an offload one, 442 // send the ioHandle of the effect thread 443 EFFECT_CMD_FIRST_PROPRIETARY = 0x10000 // first proprietary command code 444 }; 445 446 //================================================================================================== 447 // command: EFFECT_CMD_INIT 448 //-------------------------------------------------------------------------------------------------- 449 // description: 450 // Initialize effect engine: All configurations return to default 451 //-------------------------------------------------------------------------------------------------- 452 // command format: 453 // size: 0 454 // data: N/A 455 //-------------------------------------------------------------------------------------------------- 456 // reply format: 457 // size: sizeof(int) 458 // data: status 459 //================================================================================================== 460 // command: EFFECT_CMD_SET_CONFIG 461 //-------------------------------------------------------------------------------------------------- 462 // description: 463 // Apply new audio parameters configurations for input and output buffers 464 //-------------------------------------------------------------------------------------------------- 465 // command format: 466 // size: sizeof(effect_config_t) 467 // data: effect_config_t 468 //-------------------------------------------------------------------------------------------------- 469 // reply format: 470 // size: sizeof(int) 471 // data: status 472 //================================================================================================== 473 // command: EFFECT_CMD_RESET 474 //-------------------------------------------------------------------------------------------------- 475 // description: 476 // Reset the effect engine. Keep configuration but resets state and buffer content 477 //-------------------------------------------------------------------------------------------------- 478 // command format: 479 // size: 0 480 // data: N/A 481 //-------------------------------------------------------------------------------------------------- 482 // reply format: 483 // size: 0 484 // data: N/A 485 //================================================================================================== 486 // command: EFFECT_CMD_ENABLE 487 //-------------------------------------------------------------------------------------------------- 488 // description: 489 // Enable the process. Called by the framework before the first call to process() 490 //-------------------------------------------------------------------------------------------------- 491 // command format: 492 // size: 0 493 // data: N/A 494 //-------------------------------------------------------------------------------------------------- 495 // reply format: 496 // size: sizeof(int) 497 // data: status 498 //================================================================================================== 499 // command: EFFECT_CMD_DISABLE 500 //-------------------------------------------------------------------------------------------------- 501 // description: 502 // Disable the process. Called by the framework after the last call to process() 503 //-------------------------------------------------------------------------------------------------- 504 // command format: 505 // size: 0 506 // data: N/A 507 //-------------------------------------------------------------------------------------------------- 508 // reply format: 509 // size: sizeof(int) 510 // data: status 511 //================================================================================================== 512 // command: EFFECT_CMD_SET_PARAM 513 //-------------------------------------------------------------------------------------------------- 514 // description: 515 // Set a parameter and apply it immediately 516 //-------------------------------------------------------------------------------------------------- 517 // command format: 518 // size: sizeof(effect_param_t) + size of param and value 519 // data: effect_param_t + param + value. See effect_param_t definition below for value offset 520 //-------------------------------------------------------------------------------------------------- 521 // reply format: 522 // size: sizeof(int) 523 // data: status 524 //================================================================================================== 525 // command: EFFECT_CMD_SET_PARAM_DEFERRED 526 //-------------------------------------------------------------------------------------------------- 527 // description: 528 // Set a parameter but apply it only when receiving EFFECT_CMD_SET_PARAM_COMMIT command 529 //-------------------------------------------------------------------------------------------------- 530 // command format: 531 // size: sizeof(effect_param_t) + size of param and value 532 // data: effect_param_t + param + value. See effect_param_t definition below for value offset 533 //-------------------------------------------------------------------------------------------------- 534 // reply format: 535 // size: 0 536 // data: N/A 537 //================================================================================================== 538 // command: EFFECT_CMD_SET_PARAM_COMMIT 539 //-------------------------------------------------------------------------------------------------- 540 // description: 541 // Apply all previously received EFFECT_CMD_SET_PARAM_DEFERRED commands 542 //-------------------------------------------------------------------------------------------------- 543 // command format: 544 // size: 0 545 // data: N/A 546 //-------------------------------------------------------------------------------------------------- 547 // reply format: 548 // size: sizeof(int) 549 // data: status 550 //================================================================================================== 551 // command: EFFECT_CMD_GET_PARAM 552 //-------------------------------------------------------------------------------------------------- 553 // description: 554 // Get a parameter value 555 //-------------------------------------------------------------------------------------------------- 556 // command format: 557 // size: sizeof(effect_param_t) + size of param 558 // data: effect_param_t + param 559 //-------------------------------------------------------------------------------------------------- 560 // reply format: 561 // size: sizeof(effect_param_t) + size of param and value 562 // data: effect_param_t + param + value. See effect_param_t definition below for value offset 563 //================================================================================================== 564 // command: EFFECT_CMD_SET_DEVICE 565 //-------------------------------------------------------------------------------------------------- 566 // description: 567 // Set the rendering device the audio output path is connected to. See audio.h, audio_devices_t 568 // for device values. 569 // The effect implementation must set EFFECT_FLAG_DEVICE_IND flag in its descriptor to receive this 570 // command when the device changes 571 //-------------------------------------------------------------------------------------------------- 572 // command format: 573 // size: sizeof(uint32_t) 574 // data: uint32_t 575 //-------------------------------------------------------------------------------------------------- 576 // reply format: 577 // size: 0 578 // data: N/A 579 //================================================================================================== 580 // command: EFFECT_CMD_SET_VOLUME 581 //-------------------------------------------------------------------------------------------------- 582 // description: 583 // Set and get volume. Used by audio framework to delegate volume control to effect engine. 584 // The effect implementation must set EFFECT_FLAG_VOLUME_IND or EFFECT_FLAG_VOLUME_CTRL flag in 585 // its descriptor to receive this command before every call to process() function 586 // If EFFECT_FLAG_VOLUME_CTRL flag is set in the effect descriptor, the effect engine must return 587 // the volume that should be applied before the effect is processed. The overall volume (the volume 588 // actually applied by the effect engine multiplied by the returned value) should match the value 589 // indicated in the command. 590 //-------------------------------------------------------------------------------------------------- 591 // command format: 592 // size: n * sizeof(uint32_t) 593 // data: volume for each channel defined in effect_config_t for output buffer expressed in 594 // 8.24 fixed point format 595 //-------------------------------------------------------------------------------------------------- 596 // reply format: 597 // size: n * sizeof(uint32_t) / 0 598 // data: - if EFFECT_FLAG_VOLUME_CTRL is set in effect descriptor: 599 // volume for each channel defined in effect_config_t for output buffer expressed in 600 // 8.24 fixed point format 601 // - if EFFECT_FLAG_VOLUME_CTRL is not set in effect descriptor: 602 // N/A 603 // It is legal to receive a null pointer as pReplyData in which case the effect framework has 604 // delegated volume control to another effect 605 //================================================================================================== 606 // command: EFFECT_CMD_SET_AUDIO_MODE 607 //-------------------------------------------------------------------------------------------------- 608 // description: 609 // Set the audio mode. The effect implementation must set EFFECT_FLAG_AUDIO_MODE_IND flag in its 610 // descriptor to receive this command when the audio mode changes. 611 //-------------------------------------------------------------------------------------------------- 612 // command format: 613 // size: sizeof(uint32_t) 614 // data: audio_mode_t 615 //-------------------------------------------------------------------------------------------------- 616 // reply format: 617 // size: 0 618 // data: N/A 619 //================================================================================================== 620 // command: EFFECT_CMD_SET_CONFIG_REVERSE 621 //-------------------------------------------------------------------------------------------------- 622 // description: 623 // Apply new audio parameters configurations for input and output buffers of reverse stream. 624 // An example of reverse stream is the echo reference supplied to an Acoustic Echo Canceler. 625 //-------------------------------------------------------------------------------------------------- 626 // command format: 627 // size: sizeof(effect_config_t) 628 // data: effect_config_t 629 //-------------------------------------------------------------------------------------------------- 630 // reply format: 631 // size: sizeof(int) 632 // data: status 633 //================================================================================================== 634 // command: EFFECT_CMD_SET_INPUT_DEVICE 635 //-------------------------------------------------------------------------------------------------- 636 // description: 637 // Set the capture device the audio input path is connected to. See audio.h, audio_devices_t 638 // for device values. 639 // The effect implementation must set EFFECT_FLAG_DEVICE_IND flag in its descriptor to receive this 640 // command when the device changes 641 //-------------------------------------------------------------------------------------------------- 642 // command format: 643 // size: sizeof(uint32_t) 644 // data: uint32_t 645 //-------------------------------------------------------------------------------------------------- 646 // reply format: 647 // size: 0 648 // data: N/A 649 //================================================================================================== 650 // command: EFFECT_CMD_GET_CONFIG 651 //-------------------------------------------------------------------------------------------------- 652 // description: 653 // Read audio parameters configurations for input and output buffers 654 //-------------------------------------------------------------------------------------------------- 655 // command format: 656 // size: 0 657 // data: N/A 658 //-------------------------------------------------------------------------------------------------- 659 // reply format: 660 // size: sizeof(effect_config_t) 661 // data: effect_config_t 662 //================================================================================================== 663 // command: EFFECT_CMD_GET_CONFIG_REVERSE 664 //-------------------------------------------------------------------------------------------------- 665 // description: 666 // Read audio parameters configurations for input and output buffers of reverse stream 667 //-------------------------------------------------------------------------------------------------- 668 // command format: 669 // size: 0 670 // data: N/A 671 //-------------------------------------------------------------------------------------------------- 672 // reply format: 673 // size: sizeof(effect_config_t) 674 // data: effect_config_t 675 //================================================================================================== 676 // command: EFFECT_CMD_GET_FEATURE_SUPPORTED_CONFIGS 677 //-------------------------------------------------------------------------------------------------- 678 // description: 679 // Queries for supported configurations for a particular feature (e.g. get the supported 680 // combinations of main and auxiliary channels for a noise suppressor). 681 // The command parameter is the feature identifier (See effect_feature_e for a list of defined 682 // features) followed by the maximum number of configuration descriptor to return. 683 // The reply is composed of: 684 // - status (uint32_t): 685 // - 0 if feature is supported 686 // - -ENOSYS if the feature is not supported, 687 // - -ENOMEM if the feature is supported but the total number of supported configurations 688 // exceeds the maximum number indicated by the caller. 689 // - total number of supported configurations (uint32_t) 690 // - an array of configuration descriptors. 691 // The actual number of descriptors returned must not exceed the maximum number indicated by 692 // the caller. 693 //-------------------------------------------------------------------------------------------------- 694 // command format: 695 // size: 2 x sizeof(uint32_t) 696 // data: effect_feature_e + maximum number of configurations to return 697 //-------------------------------------------------------------------------------------------------- 698 // reply format: 699 // size: 2 x sizeof(uint32_t) + n x sizeof (<config descriptor>) 700 // data: status + total number of configurations supported + array of n config descriptors 701 //================================================================================================== 702 // command: EFFECT_CMD_GET_FEATURE_CONFIG 703 //-------------------------------------------------------------------------------------------------- 704 // description: 705 // Retrieves current configuration for a given feature. 706 // The reply status is: 707 // - 0 if feature is supported 708 // - -ENOSYS if the feature is not supported, 709 //-------------------------------------------------------------------------------------------------- 710 // command format: 711 // size: sizeof(uint32_t) 712 // data: effect_feature_e 713 //-------------------------------------------------------------------------------------------------- 714 // reply format: 715 // size: sizeof(uint32_t) + sizeof (<config descriptor>) 716 // data: status + config descriptor 717 //================================================================================================== 718 // command: EFFECT_CMD_SET_FEATURE_CONFIG 719 //-------------------------------------------------------------------------------------------------- 720 // description: 721 // Sets current configuration for a given feature. 722 // The reply status is: 723 // - 0 if feature is supported 724 // - -ENOSYS if the feature is not supported, 725 // - -EINVAL if the configuration is invalid 726 //-------------------------------------------------------------------------------------------------- 727 // command format: 728 // size: sizeof(uint32_t) + sizeof (<config descriptor>) 729 // data: effect_feature_e + config descriptor 730 //-------------------------------------------------------------------------------------------------- 731 // reply format: 732 // size: sizeof(uint32_t) 733 // data: status 734 //================================================================================================== 735 // command: EFFECT_CMD_SET_AUDIO_SOURCE 736 //-------------------------------------------------------------------------------------------------- 737 // description: 738 // Set the audio source the capture path is configured for (Camcorder, voice recognition...). 739 // See audio.h, audio_source_t for values. 740 //-------------------------------------------------------------------------------------------------- 741 // command format: 742 // size: sizeof(uint32_t) 743 // data: uint32_t 744 //-------------------------------------------------------------------------------------------------- 745 // reply format: 746 // size: 0 747 // data: N/A 748 //================================================================================================== 749 // command: EFFECT_CMD_OFFLOAD 750 //-------------------------------------------------------------------------------------------------- 751 // description: 752 // 1.indicate if the playback thread the effect is attached to is offloaded or not 753 // 2.update the io handle of the playback thread the effect is attached to 754 //-------------------------------------------------------------------------------------------------- 755 // command format: 756 // size: sizeof(effect_offload_param_t) 757 // data: effect_offload_param_t 758 //-------------------------------------------------------------------------------------------------- 759 // reply format: 760 // size: sizeof(uint32_t) 761 // data: uint32_t 762 //-------------------------------------------------------------------------------------------------- 763 // command: EFFECT_CMD_FIRST_PROPRIETARY 764 //-------------------------------------------------------------------------------------------------- 765 // description: 766 // All proprietary effect commands must use command codes above this value. The size and format of 767 // command and response fields is free in this case 768 //================================================================================================== 769 770 771 // Audio buffer descriptor used by process(), bufferProvider() functions and buffer_config_t 772 // structure. Multi-channel audio is always interleaved. The channel order is from LSB to MSB with 773 // regard to the channel mask definition in audio.h, audio_channel_mask_t e.g : 774 // Stereo: left, right 775 // 5 point 1: front left, front right, front center, low frequency, back left, back right 776 // The buffer size is expressed in frame count, a frame being composed of samples for all 777 // channels at a given time. Frame size for unspecified format (AUDIO_FORMAT_OTHER) is 8 bit by 778 // definition 779 struct audio_buffer_s { 780 size_t frameCount; // number of frames in buffer 781 union { 782 void* raw; // raw pointer to start of buffer 783 int32_t* s32; // pointer to signed 32 bit data at start of buffer 784 int16_t* s16; // pointer to signed 16 bit data at start of buffer 785 uint8_t* u8; // pointer to unsigned 8 bit data at start of buffer 786 }; 787 }; 788 789 // The buffer_provider_s structure contains functions that can be used 790 // by the effect engine process() function to query and release input 791 // or output audio buffer. 792 // The getBuffer() function is called to retrieve a buffer where data 793 // should read from or written to by process() function. 794 // The releaseBuffer() function MUST be called when the buffer retrieved 795 // with getBuffer() is not needed anymore. 796 // The process function should use the buffer provider mechanism to retrieve 797 // input or output buffer if the inBuffer or outBuffer passed as argument is NULL 798 // and the buffer configuration (buffer_config_t) given by the EFFECT_CMD_SET_CONFIG 799 // command did not specify an audio buffer. 800 801 typedef int32_t (* buffer_function_t)(void *cookie, audio_buffer_t *buffer); 802 803 typedef struct buffer_provider_s { 804 buffer_function_t getBuffer; // retrieve next buffer 805 buffer_function_t releaseBuffer; // release used buffer 806 void *cookie; // for use by client of buffer provider functions 807 } buffer_provider_t; 808 809 810 // The buffer_config_s structure specifies the input or output audio format 811 // to be used by the effect engine. It is part of the effect_config_t 812 // structure that defines both input and output buffer configurations and is 813 // passed by the EFFECT_CMD_SET_CONFIG or EFFECT_CMD_SET_CONFIG_REVERSE command. 814 typedef struct buffer_config_s { 815 audio_buffer_t buffer; // buffer for use by process() function if not passed explicitly 816 uint32_t samplingRate; // sampling rate 817 uint32_t channels; // channel mask (see audio_channel_mask_t in audio.h) 818 buffer_provider_t bufferProvider; // buffer provider 819 uint8_t format; // Audio format (see audio_format_t in audio.h) 820 uint8_t accessMode; // read/write or accumulate in buffer (effect_buffer_access_e) 821 uint16_t mask; // indicates which of the above fields is valid 822 } buffer_config_t; 823 824 // Values for "accessMode" field of buffer_config_t: 825 // overwrite, read only, accumulate (read/modify/write) 826 enum effect_buffer_access_e { 827 EFFECT_BUFFER_ACCESS_WRITE, 828 EFFECT_BUFFER_ACCESS_READ, 829 EFFECT_BUFFER_ACCESS_ACCUMULATE 830 831 }; 832 833 // feature identifiers for EFFECT_CMD_GET_FEATURE_SUPPORTED_CONFIGS command 834 enum effect_feature_e { 835 EFFECT_FEATURE_AUX_CHANNELS, // supports auxiliary channels (e.g. dual mic noise suppressor) 836 EFFECT_FEATURE_CNT 837 }; 838 839 // EFFECT_FEATURE_AUX_CHANNELS feature configuration descriptor. Describe a combination 840 // of main and auxiliary channels supported 841 typedef struct channel_config_s { 842 audio_channel_mask_t main_channels; // channel mask for main channels 843 audio_channel_mask_t aux_channels; // channel mask for auxiliary channels 844 } channel_config_t; 845 846 847 // Values for bit field "mask" in buffer_config_t. If a bit is set, the corresponding field 848 // in buffer_config_t must be taken into account when executing the EFFECT_CMD_SET_CONFIG command 849 #define EFFECT_CONFIG_BUFFER 0x0001 // buffer field must be taken into account 850 #define EFFECT_CONFIG_SMP_RATE 0x0002 // samplingRate field must be taken into account 851 #define EFFECT_CONFIG_CHANNELS 0x0004 // channels field must be taken into account 852 #define EFFECT_CONFIG_FORMAT 0x0008 // format field must be taken into account 853 #define EFFECT_CONFIG_ACC_MODE 0x0010 // accessMode field must be taken into account 854 #define EFFECT_CONFIG_PROVIDER 0x0020 // bufferProvider field must be taken into account 855 #define EFFECT_CONFIG_ALL (EFFECT_CONFIG_BUFFER | EFFECT_CONFIG_SMP_RATE | \ 856 EFFECT_CONFIG_CHANNELS | EFFECT_CONFIG_FORMAT | \ 857 EFFECT_CONFIG_ACC_MODE | EFFECT_CONFIG_PROVIDER) 858 859 860 // effect_config_s structure describes the format of the pCmdData argument of EFFECT_CMD_SET_CONFIG 861 // command to configure audio parameters and buffers for effect engine input and output. 862 typedef struct effect_config_s { 863 buffer_config_t inputCfg; 864 buffer_config_t outputCfg; 865 } effect_config_t; 866 867 868 // effect_param_s structure describes the format of the pCmdData argument of EFFECT_CMD_SET_PARAM 869 // command and pCmdData and pReplyData of EFFECT_CMD_GET_PARAM command. 870 // psize and vsize represent the actual size of parameter and value. 871 // 872 // NOTE: the start of value field inside the data field is always on a 32 bit boundary: 873 // 874 // +-----------+ 875 // | status | sizeof(int) 876 // +-----------+ 877 // | psize | sizeof(int) 878 // +-----------+ 879 // | vsize | sizeof(int) 880 // +-----------+ 881 // | | | | 882 // ~ parameter ~ > psize | 883 // | | | > ((psize - 1)/sizeof(int) + 1) * sizeof(int) 884 // +-----------+ | 885 // | padding | | 886 // +-----------+ 887 // | | | 888 // ~ value ~ > vsize 889 // | | | 890 // +-----------+ 891 892 typedef struct effect_param_s { 893 int32_t status; // Transaction status (unused for command, used for reply) 894 uint32_t psize; // Parameter size 895 uint32_t vsize; // Value size 896 char data[]; // Start of Parameter + Value data 897 } effect_param_t; 898 899 // structure used by EFFECT_CMD_OFFLOAD command 900 typedef struct effect_offload_param_s { 901 bool isOffload; // true if the playback thread the effect is attached to is offloaded 902 int ioHandle; // io handle of the playback thread the effect is attached to 903 } effect_offload_param_t; 904 905 906 ///////////////////////////////////////////////// 907 // Effect library interface 908 ///////////////////////////////////////////////// 909 910 // Effect library interface version 3.0 911 // Note that EffectsFactory.c only checks the major version component, so changes to the minor 912 // number can only be used for fully backwards compatible changes 913 #define EFFECT_LIBRARY_API_VERSION EFFECT_MAKE_API_VERSION(3,0) 914 915 #define AUDIO_EFFECT_LIBRARY_TAG ((('A') << 24) | (('E') << 16) | (('L') << 8) | ('T')) 916 917 // Every effect library must have a data structure named AUDIO_EFFECT_LIBRARY_INFO_SYM 918 // and the fields of this data structure must begin with audio_effect_library_t 919 920 typedef struct audio_effect_library_s { 921 // tag must be initialized to AUDIO_EFFECT_LIBRARY_TAG 922 uint32_t tag; 923 // Version of the effect library API : 0xMMMMmmmm MMMM: Major, mmmm: minor 924 uint32_t version; 925 // Name of this library 926 const char *name; 927 // Author/owner/implementor of the library 928 const char *implementor; 929 930 //////////////////////////////////////////////////////////////////////////////// 931 // 932 // Function: create_effect 933 // 934 // Description: Creates an effect engine of the specified implementation uuid and 935 // returns an effect control interface on this engine. The function will allocate the 936 // resources for an instance of the requested effect engine and return 937 // a handle on the effect control interface. 938 // 939 // Input: 940 // uuid: pointer to the effect uuid. 941 // sessionId: audio session to which this effect instance will be attached. 942 // All effects created with the same session ID are connected in series and process 943 // the same signal stream. Knowing that two effects are part of the same effect 944 // chain can help the library implement some kind of optimizations. 945 // ioId: identifies the output or input stream this effect is directed to in 946 // audio HAL. 947 // For future use especially with tunneled HW accelerated effects 948 // 949 // Input/Output: 950 // pHandle: address where to return the effect interface handle. 951 // 952 // Output: 953 // returned value: 0 successful operation. 954 // -ENODEV library failed to initialize 955 // -EINVAL invalid pEffectUuid or pHandle 956 // -ENOENT no effect with this uuid found 957 // *pHandle: updated with the effect interface handle. 958 // 959 //////////////////////////////////////////////////////////////////////////////// 960 int32_t (*create_effect)(const effect_uuid_t *uuid, 961 int32_t sessionId, 962 int32_t ioId, 963 effect_handle_t *pHandle); 964 965 //////////////////////////////////////////////////////////////////////////////// 966 // 967 // Function: release_effect 968 // 969 // Description: Releases the effect engine whose handle is given as argument. 970 // All resources allocated to this particular instance of the effect are 971 // released. 972 // 973 // Input: 974 // handle: handle on the effect interface to be released. 975 // 976 // Output: 977 // returned value: 0 successful operation. 978 // -ENODEV library failed to initialize 979 // -EINVAL invalid interface handle 980 // 981 //////////////////////////////////////////////////////////////////////////////// 982 int32_t (*release_effect)(effect_handle_t handle); 983 984 //////////////////////////////////////////////////////////////////////////////// 985 // 986 // Function: get_descriptor 987 // 988 // Description: Returns the descriptor of the effect engine which implementation UUID is 989 // given as argument. 990 // 991 // Input/Output: 992 // uuid: pointer to the effect uuid. 993 // pDescriptor: address where to return the effect descriptor. 994 // 995 // Output: 996 // returned value: 0 successful operation. 997 // -ENODEV library failed to initialize 998 // -EINVAL invalid pDescriptor or uuid 999 // *pDescriptor: updated with the effect descriptor. 1000 // 1001 //////////////////////////////////////////////////////////////////////////////// 1002 int32_t (*get_descriptor)(const effect_uuid_t *uuid, 1003 effect_descriptor_t *pDescriptor); 1004 } audio_effect_library_t; 1005 1006 // Name of the hal_module_info 1007 #define AUDIO_EFFECT_LIBRARY_INFO_SYM AELI 1008 1009 // Name of the hal_module_info as a string 1010 #define AUDIO_EFFECT_LIBRARY_INFO_SYM_AS_STR "AELI" 1011 1012 __END_DECLS 1013 1014 #endif // ANDROID_AUDIO_EFFECT_H 1015