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