/* * Copyright (C) 2011 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef ANDROID_AUDIO_EFFECT_H #define ANDROID_AUDIO_EFFECT_H #include #include #include #include #include #include __BEGIN_DECLS ///////////////////////////////////////////////// // Common Definitions ///////////////////////////////////////////////// // //--- Effect descriptor structure effect_descriptor_t // // Unique effect ID (can be generated from the following site: // http://www.itu.int/ITU-T/asn1/uuid.html) // This format is used for both "type" and "uuid" fields of the effect descriptor structure. // - When used for effect type and the engine is implementing and effect corresponding to a standard // OpenSL ES interface, this ID must be the one defined in OpenSLES_IID.h for that interface. // - When used as uuid, it should be a unique UUID for this particular implementation. typedef struct effect_uuid_s { uint32_t timeLow; uint16_t timeMid; uint16_t timeHiAndVersion; uint16_t clockSeq; uint8_t node[6]; } effect_uuid_t; // Maximum length of character strings in structures defines by this API. #define EFFECT_STRING_LEN_MAX 64 // NULL UUID definition (matches SL_IID_NULL_) #define EFFECT_UUID_INITIALIZER { 0xec7178ec, 0xe5e1, 0x4432, 0xa3f4, \ { 0x46, 0x57, 0xe6, 0x79, 0x52, 0x10 } } static const effect_uuid_t EFFECT_UUID_NULL_ = EFFECT_UUID_INITIALIZER; static const effect_uuid_t * const EFFECT_UUID_NULL = &EFFECT_UUID_NULL_; static const char * const EFFECT_UUID_NULL_STR = "ec7178ec-e5e1-4432-a3f4-4657e6795210"; // The effect descriptor contains necessary information to facilitate the enumeration of the effect // engines present in a library. typedef struct effect_descriptor_s { effect_uuid_t type; // UUID of to the OpenSL ES interface implemented by this effect effect_uuid_t uuid; // UUID for this particular implementation uint32_t apiVersion; // Version of the effect control API implemented uint32_t flags; // effect engine capabilities/requirements flags (see below) uint16_t cpuLoad; // CPU load indication (see below) uint16_t memoryUsage; // Data Memory usage (see below) char name[EFFECT_STRING_LEN_MAX]; // human readable effect name char implementor[EFFECT_STRING_LEN_MAX]; // human readable effect implementor name } effect_descriptor_t; // CPU load and memory usage indication: each effect implementation must provide an indication of // its CPU and memory usage for the audio effect framework to limit the number of effects // instantiated at a given time on a given platform. // The CPU load is expressed in 0.1 MIPS units as estimated on an ARM9E core (ARMv5TE) with 0 WS. // The memory usage is expressed in KB and includes only dynamically allocated memory // Definitions for flags field of effect descriptor. // +---------------------------+-----------+----------------------------------- // | description | bits | values // +---------------------------+-----------+----------------------------------- // | connection mode | 0..2 | 0 insert: after track process // | | | 1 auxiliary: connect to track auxiliary // | | | output and use send level // | | | 2 replace: replaces track process function; // | | | must implement SRC, volume and mono to stereo. // | | | 3 pre processing: applied below audio HAL on input // | | | 4 post processing: applied below audio HAL on output // | | | 5 - 7 reserved // +---------------------------+-----------+----------------------------------- // | insertion preference | 3..5 | 0 none // | | | 1 first of the chain // | | | 2 last of the chain // | | | 3 exclusive (only effect in the insert chain) // | | | 4..7 reserved // +---------------------------+-----------+----------------------------------- // | Volume management | 6..8 | 0 none // | | | 1 implements volume control // | | | 2 requires volume indication // | | | 4 reserved // +---------------------------+-----------+----------------------------------- // | Device indication | 9..11 | 0 none // | | | 1 requires device updates // | | | 2, 4 reserved // +---------------------------+-----------+----------------------------------- // | Sample input mode | 12..13 | 1 direct: process() function or EFFECT_CMD_SET_CONFIG // | | | command must specify a buffer descriptor // | | | 2 provider: process() function uses the // | | | bufferProvider indicated by the // | | | EFFECT_CMD_SET_CONFIG command to request input. // | | | buffers. // | | | 3 both: both input modes are supported // +---------------------------+-----------+----------------------------------- // | Sample output mode | 14..15 | 1 direct: process() function or EFFECT_CMD_SET_CONFIG // | | | command must specify a buffer descriptor // | | | 2 provider: process() function uses the // | | | bufferProvider indicated by the // | | | EFFECT_CMD_SET_CONFIG command to request output // | | | buffers. // | | | 3 both: both output modes are supported // +---------------------------+-----------+----------------------------------- // | Hardware acceleration | 16..17 | 0 No hardware acceleration // | | | 1 non tunneled hw acceleration: the process() function // | | | reads the samples, send them to HW accelerated // | | | effect processor, reads back the processed samples // | | | and returns them to the output buffer. // | | | 2 tunneled hw acceleration: the process() function is // | | | transparent. The effect interface is only used to // | | | control the effect engine. This mode is relevant for // | | | global effects actually applied by the audio // | | | hardware on the output stream. // +---------------------------+-----------+----------------------------------- // | Audio Mode indication | 18..19 | 0 none // | | | 1 requires audio mode updates // | | | 2..3 reserved // +---------------------------+-----------+----------------------------------- // | Audio source indication | 20..21 | 0 none // | | | 1 requires audio source updates // | | | 2..3 reserved // +---------------------------+-----------+----------------------------------- // | Effect offload supported | 22 | 0 The effect cannot be offloaded to an audio DSP // | | | 1 The effect can be offloaded to an audio DSP // +---------------------------+-----------+----------------------------------- // Insert mode #define EFFECT_FLAG_TYPE_SHIFT 0 #define EFFECT_FLAG_TYPE_SIZE 3 #define EFFECT_FLAG_TYPE_MASK (((1 << EFFECT_FLAG_TYPE_SIZE) -1) \ << EFFECT_FLAG_TYPE_SHIFT) #define EFFECT_FLAG_TYPE_INSERT (0 << EFFECT_FLAG_TYPE_SHIFT) #define EFFECT_FLAG_TYPE_AUXILIARY (1 << EFFECT_FLAG_TYPE_SHIFT) #define EFFECT_FLAG_TYPE_REPLACE (2 << EFFECT_FLAG_TYPE_SHIFT) #define EFFECT_FLAG_TYPE_PRE_PROC (3 << EFFECT_FLAG_TYPE_SHIFT) #define EFFECT_FLAG_TYPE_POST_PROC (4 << EFFECT_FLAG_TYPE_SHIFT) // Insert preference #define EFFECT_FLAG_INSERT_SHIFT (EFFECT_FLAG_TYPE_SHIFT + EFFECT_FLAG_TYPE_SIZE) #define EFFECT_FLAG_INSERT_SIZE 3 #define EFFECT_FLAG_INSERT_MASK (((1 << EFFECT_FLAG_INSERT_SIZE) -1) \ << EFFECT_FLAG_INSERT_SHIFT) #define EFFECT_FLAG_INSERT_ANY (0 << EFFECT_FLAG_INSERT_SHIFT) #define EFFECT_FLAG_INSERT_FIRST (1 << EFFECT_FLAG_INSERT_SHIFT) #define EFFECT_FLAG_INSERT_LAST (2 << EFFECT_FLAG_INSERT_SHIFT) #define EFFECT_FLAG_INSERT_EXCLUSIVE (3 << EFFECT_FLAG_INSERT_SHIFT) // Volume control #define EFFECT_FLAG_VOLUME_SHIFT (EFFECT_FLAG_INSERT_SHIFT + EFFECT_FLAG_INSERT_SIZE) #define EFFECT_FLAG_VOLUME_SIZE 3 #define EFFECT_FLAG_VOLUME_MASK (((1 << EFFECT_FLAG_VOLUME_SIZE) -1) \ << EFFECT_FLAG_VOLUME_SHIFT) #define EFFECT_FLAG_VOLUME_CTRL (1 << EFFECT_FLAG_VOLUME_SHIFT) #define EFFECT_FLAG_VOLUME_IND (2 << EFFECT_FLAG_VOLUME_SHIFT) #define EFFECT_FLAG_VOLUME_NONE (0 << EFFECT_FLAG_VOLUME_SHIFT) // Device indication #define EFFECT_FLAG_DEVICE_SHIFT (EFFECT_FLAG_VOLUME_SHIFT + EFFECT_FLAG_VOLUME_SIZE) #define EFFECT_FLAG_DEVICE_SIZE 3 #define EFFECT_FLAG_DEVICE_MASK (((1 << EFFECT_FLAG_DEVICE_SIZE) -1) \ << EFFECT_FLAG_DEVICE_SHIFT) #define EFFECT_FLAG_DEVICE_IND (1 << EFFECT_FLAG_DEVICE_SHIFT) #define EFFECT_FLAG_DEVICE_NONE (0 << EFFECT_FLAG_DEVICE_SHIFT) // Sample input modes #define EFFECT_FLAG_INPUT_SHIFT (EFFECT_FLAG_DEVICE_SHIFT + EFFECT_FLAG_DEVICE_SIZE) #define EFFECT_FLAG_INPUT_SIZE 2 #define EFFECT_FLAG_INPUT_MASK (((1 << EFFECT_FLAG_INPUT_SIZE) -1) \ << EFFECT_FLAG_INPUT_SHIFT) #define EFFECT_FLAG_INPUT_DIRECT (1 << EFFECT_FLAG_INPUT_SHIFT) #define EFFECT_FLAG_INPUT_PROVIDER (2 << EFFECT_FLAG_INPUT_SHIFT) #define EFFECT_FLAG_INPUT_BOTH (3 << EFFECT_FLAG_INPUT_SHIFT) // Sample output modes #define EFFECT_FLAG_OUTPUT_SHIFT (EFFECT_FLAG_INPUT_SHIFT + EFFECT_FLAG_INPUT_SIZE) #define EFFECT_FLAG_OUTPUT_SIZE 2 #define EFFECT_FLAG_OUTPUT_MASK (((1 << EFFECT_FLAG_OUTPUT_SIZE) -1) \ << EFFECT_FLAG_OUTPUT_SHIFT) #define EFFECT_FLAG_OUTPUT_DIRECT (1 << EFFECT_FLAG_OUTPUT_SHIFT) #define EFFECT_FLAG_OUTPUT_PROVIDER (2 << EFFECT_FLAG_OUTPUT_SHIFT) #define EFFECT_FLAG_OUTPUT_BOTH (3 << EFFECT_FLAG_OUTPUT_SHIFT) // Hardware acceleration mode #define EFFECT_FLAG_HW_ACC_SHIFT (EFFECT_FLAG_OUTPUT_SHIFT + EFFECT_FLAG_OUTPUT_SIZE) #define EFFECT_FLAG_HW_ACC_SIZE 2 #define EFFECT_FLAG_HW_ACC_MASK (((1 << EFFECT_FLAG_HW_ACC_SIZE) -1) \ << EFFECT_FLAG_HW_ACC_SHIFT) #define EFFECT_FLAG_HW_ACC_SIMPLE (1 << EFFECT_FLAG_HW_ACC_SHIFT) #define EFFECT_FLAG_HW_ACC_TUNNEL (2 << EFFECT_FLAG_HW_ACC_SHIFT) // Audio mode indication #define EFFECT_FLAG_AUDIO_MODE_SHIFT (EFFECT_FLAG_HW_ACC_SHIFT + EFFECT_FLAG_HW_ACC_SIZE) #define EFFECT_FLAG_AUDIO_MODE_SIZE 2 #define EFFECT_FLAG_AUDIO_MODE_MASK (((1 << EFFECT_FLAG_AUDIO_MODE_SIZE) -1) \ << EFFECT_FLAG_AUDIO_MODE_SHIFT) #define EFFECT_FLAG_AUDIO_MODE_IND (1 << EFFECT_FLAG_AUDIO_MODE_SHIFT) #define EFFECT_FLAG_AUDIO_MODE_NONE (0 << EFFECT_FLAG_AUDIO_MODE_SHIFT) // Audio source indication #define EFFECT_FLAG_AUDIO_SOURCE_SHIFT (EFFECT_FLAG_AUDIO_MODE_SHIFT + EFFECT_FLAG_AUDIO_MODE_SIZE) #define EFFECT_FLAG_AUDIO_SOURCE_SIZE 2 #define EFFECT_FLAG_AUDIO_SOURCE_MASK (((1 << EFFECT_FLAG_AUDIO_SOURCE_SIZE) -1) \ << EFFECT_FLAG_AUDIO_SOURCE_SHIFT) #define EFFECT_FLAG_AUDIO_SOURCE_IND (1 << EFFECT_FLAG_AUDIO_SOURCE_SHIFT) #define EFFECT_FLAG_AUDIO_SOURCE_NONE (0 << EFFECT_FLAG_AUDIO_SOURCE_SHIFT) // Effect offload indication #define EFFECT_FLAG_OFFLOAD_SHIFT (EFFECT_FLAG_AUDIO_SOURCE_SHIFT + \ EFFECT_FLAG_AUDIO_SOURCE_SIZE) #define EFFECT_FLAG_OFFLOAD_SIZE 1 #define EFFECT_FLAG_OFFLOAD_MASK (((1 << EFFECT_FLAG_OFFLOAD_SIZE) -1) \ << EFFECT_FLAG_OFFLOAD_SHIFT) #define EFFECT_FLAG_OFFLOAD_SUPPORTED (1 << EFFECT_FLAG_OFFLOAD_SHIFT) #define EFFECT_MAKE_API_VERSION(M, m) (((M)<<16) | ((m) & 0xFFFF)) #define EFFECT_API_VERSION_MAJOR(v) ((v)>>16) #define EFFECT_API_VERSION_MINOR(v) ((m) & 0xFFFF) ///////////////////////////////////////////////// // Effect control interface ///////////////////////////////////////////////// // Effect control interface version 2.0 #define EFFECT_CONTROL_API_VERSION EFFECT_MAKE_API_VERSION(2,0) // Effect control interface structure: effect_interface_s // The effect control interface is exposed by each effect engine implementation. It consists of // a set of functions controlling the configuration, activation and process of the engine. // The functions are grouped in a structure of type effect_interface_s. // // Effect control interface handle: effect_handle_t // The effect_handle_t serves two purposes regarding the implementation of the effect engine: // - 1 it is the address of a pointer to an effect_interface_s structure where the functions // of the effect control API for a particular effect are located. // - 2 it is the address of the context of a particular effect instance. // A typical implementation in the effect library would define a structure as follows: // struct effect_module_s { // const struct effect_interface_s *itfe; // effect_config_t config; // effect_context_t context; // } // The implementation of EffectCreate() function would then allocate a structure of this // type and return its address as effect_handle_t typedef struct effect_interface_s **effect_handle_t; // Forward definition of type audio_buffer_t typedef struct audio_buffer_s audio_buffer_t; // Effect control interface definition struct effect_interface_s { //////////////////////////////////////////////////////////////////////////////// // // Function: process // // Description: Effect process function. Takes input samples as specified // (count and location) in input buffer descriptor and output processed // samples as specified in output buffer descriptor. If the buffer descriptor // is not specified the function must use either the buffer or the // buffer provider function installed by the EFFECT_CMD_SET_CONFIG command. // The effect framework will call the process() function after the EFFECT_CMD_ENABLE // command is received and until the EFFECT_CMD_DISABLE is received. When the engine // receives the EFFECT_CMD_DISABLE command it should turn off the effect gracefully // and when done indicate that it is OK to stop calling the process() function by // returning the -ENODATA status. // // NOTE: the process() function implementation should be "real-time safe" that is // it should not perform blocking calls: malloc/free, sleep, read/write/open/close, // pthread_cond_wait/pthread_mutex_lock... // // Input: // self: handle to the effect interface this function // is called on. // inBuffer: buffer descriptor indicating where to read samples to process. // If NULL, use the configuration passed by EFFECT_CMD_SET_CONFIG command. // // outBuffer: buffer descriptor indicating where to write processed samples. // If NULL, use the configuration passed by EFFECT_CMD_SET_CONFIG command. // // Output: // returned value: 0 successful operation // -ENODATA the engine has finished the disable phase and the framework // can stop calling process() // -EINVAL invalid interface handle or // invalid input/output buffer description //////////////////////////////////////////////////////////////////////////////// int32_t (*process)(effect_handle_t self, audio_buffer_t *inBuffer, audio_buffer_t *outBuffer); //////////////////////////////////////////////////////////////////////////////// // // Function: command // // Description: Send a command and receive a response to/from effect engine. // // Input: // self: handle to the effect interface this function // is called on. // cmdCode: command code: the command can be a standardized command defined in // effect_command_e (see below) or a proprietary command. // cmdSize: size of command in bytes // pCmdData: pointer to command data // pReplyData: pointer to reply data // // Input/Output: // replySize: maximum size of reply data as input // actual size of reply data as output // // Output: // returned value: 0 successful operation // -EINVAL invalid interface handle or // invalid command/reply size or format according to command code // The return code should be restricted to indicate problems related to the this // API specification. Status related to the execution of a particular command should be // indicated as part of the reply field. // // *pReplyData updated with command response // //////////////////////////////////////////////////////////////////////////////// int32_t (*command)(effect_handle_t self, uint32_t cmdCode, uint32_t cmdSize, void *pCmdData, uint32_t *replySize, void *pReplyData); //////////////////////////////////////////////////////////////////////////////// // // Function: get_descriptor // // Description: Returns the effect descriptor // // Input: // self: handle to the effect interface this function // is called on. // // Input/Output: // pDescriptor: address where to return the effect descriptor. // // Output: // returned value: 0 successful operation. // -EINVAL invalid interface handle or invalid pDescriptor // *pDescriptor: updated with the effect descriptor. // //////////////////////////////////////////////////////////////////////////////// int32_t (*get_descriptor)(effect_handle_t self, effect_descriptor_t *pDescriptor); //////////////////////////////////////////////////////////////////////////////// // // Function: process_reverse // // Description: Process reverse stream function. This function is used to pass // a reference stream to the effect engine. If the engine does not need a reference // stream, this function pointer can be set to NULL. // This function would typically implemented by an Echo Canceler. // // Input: // self: handle to the effect interface this function // is called on. // inBuffer: buffer descriptor indicating where to read samples to process. // If NULL, use the configuration passed by EFFECT_CMD_SET_CONFIG_REVERSE command. // // outBuffer: buffer descriptor indicating where to write processed samples. // If NULL, use the configuration passed by EFFECT_CMD_SET_CONFIG_REVERSE command. // If the buffer and buffer provider in the configuration received by // EFFECT_CMD_SET_CONFIG_REVERSE are also NULL, do not return modified reverse // stream data // // Output: // returned value: 0 successful operation // -ENODATA the engine has finished the disable phase and the framework // can stop calling process_reverse() // -EINVAL invalid interface handle or // invalid input/output buffer description //////////////////////////////////////////////////////////////////////////////// int32_t (*process_reverse)(effect_handle_t self, audio_buffer_t *inBuffer, audio_buffer_t *outBuffer); }; // //--- Standardized command codes for command() function // enum effect_command_e { EFFECT_CMD_INIT, // initialize effect engine EFFECT_CMD_SET_CONFIG, // configure effect engine (see effect_config_t) EFFECT_CMD_RESET, // reset effect engine EFFECT_CMD_ENABLE, // enable effect process EFFECT_CMD_DISABLE, // disable effect process EFFECT_CMD_SET_PARAM, // set parameter immediately (see effect_param_t) EFFECT_CMD_SET_PARAM_DEFERRED, // set parameter deferred EFFECT_CMD_SET_PARAM_COMMIT, // commit previous set parameter deferred EFFECT_CMD_GET_PARAM, // get parameter EFFECT_CMD_SET_DEVICE, // set audio device (see audio.h, audio_devices_t) EFFECT_CMD_SET_VOLUME, // set volume EFFECT_CMD_SET_AUDIO_MODE, // set the audio mode (normal, ring, ...) EFFECT_CMD_SET_CONFIG_REVERSE, // configure effect engine reverse stream(see effect_config_t) EFFECT_CMD_SET_INPUT_DEVICE, // set capture device (see audio.h, audio_devices_t) EFFECT_CMD_GET_CONFIG, // read effect engine configuration EFFECT_CMD_GET_CONFIG_REVERSE, // read configure effect engine reverse stream configuration EFFECT_CMD_GET_FEATURE_SUPPORTED_CONFIGS,// get all supported configurations for a feature. EFFECT_CMD_GET_FEATURE_CONFIG, // get current feature configuration EFFECT_CMD_SET_FEATURE_CONFIG, // set current feature configuration EFFECT_CMD_SET_AUDIO_SOURCE, // set the audio source (see audio.h, audio_source_t) EFFECT_CMD_OFFLOAD, // set if effect thread is an offload one, // send the ioHandle of the effect thread EFFECT_CMD_FIRST_PROPRIETARY = 0x10000 // first proprietary command code }; //================================================================================================== // command: EFFECT_CMD_INIT //-------------------------------------------------------------------------------------------------- // description: // Initialize effect engine: All configurations return to default //-------------------------------------------------------------------------------------------------- // command format: // size: 0 // data: N/A //-------------------------------------------------------------------------------------------------- // reply format: // size: sizeof(int) // data: status //================================================================================================== // command: EFFECT_CMD_SET_CONFIG //-------------------------------------------------------------------------------------------------- // description: // Apply new audio parameters configurations for input and output buffers //-------------------------------------------------------------------------------------------------- // command format: // size: sizeof(effect_config_t) // data: effect_config_t //-------------------------------------------------------------------------------------------------- // reply format: // size: sizeof(int) // data: status //================================================================================================== // command: EFFECT_CMD_RESET //-------------------------------------------------------------------------------------------------- // description: // Reset the effect engine. Keep configuration but resets state and buffer content //-------------------------------------------------------------------------------------------------- // command format: // size: 0 // data: N/A //-------------------------------------------------------------------------------------------------- // reply format: // size: 0 // data: N/A //================================================================================================== // command: EFFECT_CMD_ENABLE //-------------------------------------------------------------------------------------------------- // description: // Enable the process. Called by the framework before the first call to process() //-------------------------------------------------------------------------------------------------- // command format: // size: 0 // data: N/A //-------------------------------------------------------------------------------------------------- // reply format: // size: sizeof(int) // data: status //================================================================================================== // command: EFFECT_CMD_DISABLE //-------------------------------------------------------------------------------------------------- // description: // Disable the process. Called by the framework after the last call to process() //-------------------------------------------------------------------------------------------------- // command format: // size: 0 // data: N/A //-------------------------------------------------------------------------------------------------- // reply format: // size: sizeof(int) // data: status //================================================================================================== // command: EFFECT_CMD_SET_PARAM //-------------------------------------------------------------------------------------------------- // description: // Set a parameter and apply it immediately //-------------------------------------------------------------------------------------------------- // command format: // size: sizeof(effect_param_t) + size of param and value // data: effect_param_t + param + value. See effect_param_t definition below for value offset //-------------------------------------------------------------------------------------------------- // reply format: // size: sizeof(int) // data: status //================================================================================================== // command: EFFECT_CMD_SET_PARAM_DEFERRED //-------------------------------------------------------------------------------------------------- // description: // Set a parameter but apply it only when receiving EFFECT_CMD_SET_PARAM_COMMIT command //-------------------------------------------------------------------------------------------------- // command format: // size: sizeof(effect_param_t) + size of param and value // data: effect_param_t + param + value. See effect_param_t definition below for value offset //-------------------------------------------------------------------------------------------------- // reply format: // size: 0 // data: N/A //================================================================================================== // command: EFFECT_CMD_SET_PARAM_COMMIT //-------------------------------------------------------------------------------------------------- // description: // Apply all previously received EFFECT_CMD_SET_PARAM_DEFERRED commands //-------------------------------------------------------------------------------------------------- // command format: // size: 0 // data: N/A //-------------------------------------------------------------------------------------------------- // reply format: // size: sizeof(int) // data: status //================================================================================================== // command: EFFECT_CMD_GET_PARAM //-------------------------------------------------------------------------------------------------- // description: // Get a parameter value //-------------------------------------------------------------------------------------------------- // command format: // size: sizeof(effect_param_t) + size of param // data: effect_param_t + param //-------------------------------------------------------------------------------------------------- // reply format: // size: sizeof(effect_param_t) + size of param and value // data: effect_param_t + param + value. See effect_param_t definition below for value offset //================================================================================================== // command: EFFECT_CMD_SET_DEVICE //-------------------------------------------------------------------------------------------------- // description: // Set the rendering device the audio output path is connected to. See audio.h, audio_devices_t // for device values. // The effect implementation must set EFFECT_FLAG_DEVICE_IND flag in its descriptor to receive this // command when the device changes //-------------------------------------------------------------------------------------------------- // command format: // size: sizeof(uint32_t) // data: uint32_t //-------------------------------------------------------------------------------------------------- // reply format: // size: 0 // data: N/A //================================================================================================== // command: EFFECT_CMD_SET_VOLUME //-------------------------------------------------------------------------------------------------- // description: // Set and get volume. Used by audio framework to delegate volume control to effect engine. // The effect implementation must set EFFECT_FLAG_VOLUME_IND or EFFECT_FLAG_VOLUME_CTRL flag in // its descriptor to receive this command before every call to process() function // If EFFECT_FLAG_VOLUME_CTRL flag is set in the effect descriptor, the effect engine must return // the volume that should be applied before the effect is processed. The overall volume (the volume // actually applied by the effect engine multiplied by the returned value) should match the value // indicated in the command. //-------------------------------------------------------------------------------------------------- // command format: // size: n * sizeof(uint32_t) // data: volume for each channel defined in effect_config_t for output buffer expressed in // 8.24 fixed point format //-------------------------------------------------------------------------------------------------- // reply format: // size: n * sizeof(uint32_t) / 0 // data: - if EFFECT_FLAG_VOLUME_CTRL is set in effect descriptor: // volume for each channel defined in effect_config_t for output buffer expressed in // 8.24 fixed point format // - if EFFECT_FLAG_VOLUME_CTRL is not set in effect descriptor: // N/A // It is legal to receive a null pointer as pReplyData in which case the effect framework has // delegated volume control to another effect //================================================================================================== // command: EFFECT_CMD_SET_AUDIO_MODE //-------------------------------------------------------------------------------------------------- // description: // Set the audio mode. The effect implementation must set EFFECT_FLAG_AUDIO_MODE_IND flag in its // descriptor to receive this command when the audio mode changes. //-------------------------------------------------------------------------------------------------- // command format: // size: sizeof(uint32_t) // data: audio_mode_t //-------------------------------------------------------------------------------------------------- // reply format: // size: 0 // data: N/A //================================================================================================== // command: EFFECT_CMD_SET_CONFIG_REVERSE //-------------------------------------------------------------------------------------------------- // description: // Apply new audio parameters configurations for input and output buffers of reverse stream. // An example of reverse stream is the echo reference supplied to an Acoustic Echo Canceler. //-------------------------------------------------------------------------------------------------- // command format: // size: sizeof(effect_config_t) // data: effect_config_t //-------------------------------------------------------------------------------------------------- // reply format: // size: sizeof(int) // data: status //================================================================================================== // command: EFFECT_CMD_SET_INPUT_DEVICE //-------------------------------------------------------------------------------------------------- // description: // Set the capture device the audio input path is connected to. See audio.h, audio_devices_t // for device values. // The effect implementation must set EFFECT_FLAG_DEVICE_IND flag in its descriptor to receive this // command when the device changes //-------------------------------------------------------------------------------------------------- // command format: // size: sizeof(uint32_t) // data: uint32_t //-------------------------------------------------------------------------------------------------- // reply format: // size: 0 // data: N/A //================================================================================================== // command: EFFECT_CMD_GET_CONFIG //-------------------------------------------------------------------------------------------------- // description: // Read audio parameters configurations for input and output buffers //-------------------------------------------------------------------------------------------------- // command format: // size: 0 // data: N/A //-------------------------------------------------------------------------------------------------- // reply format: // size: sizeof(effect_config_t) // data: effect_config_t //================================================================================================== // command: EFFECT_CMD_GET_CONFIG_REVERSE //-------------------------------------------------------------------------------------------------- // description: // Read audio parameters configurations for input and output buffers of reverse stream //-------------------------------------------------------------------------------------------------- // command format: // size: 0 // data: N/A //-------------------------------------------------------------------------------------------------- // reply format: // size: sizeof(effect_config_t) // data: effect_config_t //================================================================================================== // command: EFFECT_CMD_GET_FEATURE_SUPPORTED_CONFIGS //-------------------------------------------------------------------------------------------------- // description: // Queries for supported configurations for a particular feature (e.g. get the supported // combinations of main and auxiliary channels for a noise suppressor). // The command parameter is the feature identifier (See effect_feature_e for a list of defined // features) followed by the maximum number of configuration descriptor to return. // The reply is composed of: // - status (uint32_t): // - 0 if feature is supported // - -ENOSYS if the feature is not supported, // - -ENOMEM if the feature is supported but the total number of supported configurations // exceeds the maximum number indicated by the caller. // - total number of supported configurations (uint32_t) // - an array of configuration descriptors. // The actual number of descriptors returned must not exceed the maximum number indicated by // the caller. //-------------------------------------------------------------------------------------------------- // command format: // size: 2 x sizeof(uint32_t) // data: effect_feature_e + maximum number of configurations to return //-------------------------------------------------------------------------------------------------- // reply format: // size: 2 x sizeof(uint32_t) + n x sizeof () // data: status + total number of configurations supported + array of n config descriptors //================================================================================================== // command: EFFECT_CMD_GET_FEATURE_CONFIG //-------------------------------------------------------------------------------------------------- // description: // Retrieves current configuration for a given feature. // The reply status is: // - 0 if feature is supported // - -ENOSYS if the feature is not supported, //-------------------------------------------------------------------------------------------------- // command format: // size: sizeof(uint32_t) // data: effect_feature_e //-------------------------------------------------------------------------------------------------- // reply format: // size: sizeof(uint32_t) + sizeof () // data: status + config descriptor //================================================================================================== // command: EFFECT_CMD_SET_FEATURE_CONFIG //-------------------------------------------------------------------------------------------------- // description: // Sets current configuration for a given feature. // The reply status is: // - 0 if feature is supported // - -ENOSYS if the feature is not supported, // - -EINVAL if the configuration is invalid //-------------------------------------------------------------------------------------------------- // command format: // size: sizeof(uint32_t) + sizeof () // data: effect_feature_e + config descriptor //-------------------------------------------------------------------------------------------------- // reply format: // size: sizeof(uint32_t) // data: status //================================================================================================== // command: EFFECT_CMD_SET_AUDIO_SOURCE //-------------------------------------------------------------------------------------------------- // description: // Set the audio source the capture path is configured for (Camcorder, voice recognition...). // See audio.h, audio_source_t for values. //-------------------------------------------------------------------------------------------------- // command format: // size: sizeof(uint32_t) // data: uint32_t //-------------------------------------------------------------------------------------------------- // reply format: // size: 0 // data: N/A //================================================================================================== // command: EFFECT_CMD_OFFLOAD //-------------------------------------------------------------------------------------------------- // description: // 1.indicate if the playback thread the effect is attached to is offloaded or not // 2.update the io handle of the playback thread the effect is attached to //-------------------------------------------------------------------------------------------------- // command format: // size: sizeof(effect_offload_param_t) // data: effect_offload_param_t //-------------------------------------------------------------------------------------------------- // reply format: // size: sizeof(uint32_t) // data: uint32_t //-------------------------------------------------------------------------------------------------- // command: EFFECT_CMD_FIRST_PROPRIETARY //-------------------------------------------------------------------------------------------------- // description: // All proprietary effect commands must use command codes above this value. The size and format of // command and response fields is free in this case //================================================================================================== // Audio buffer descriptor used by process(), bufferProvider() functions and buffer_config_t // structure. Multi-channel audio is always interleaved. The channel order is from LSB to MSB with // regard to the channel mask definition in audio.h, audio_channel_mask_t e.g : // Stereo: left, right // 5 point 1: front left, front right, front center, low frequency, back left, back right // The buffer size is expressed in frame count, a frame being composed of samples for all // channels at a given time. Frame size for unspecified format (AUDIO_FORMAT_OTHER) is 8 bit by // definition struct audio_buffer_s { size_t frameCount; // number of frames in buffer union { void* raw; // raw pointer to start of buffer int32_t* s32; // pointer to signed 32 bit data at start of buffer int16_t* s16; // pointer to signed 16 bit data at start of buffer uint8_t* u8; // pointer to unsigned 8 bit data at start of buffer }; }; // The buffer_provider_s structure contains functions that can be used // by the effect engine process() function to query and release input // or output audio buffer. // The getBuffer() function is called to retrieve a buffer where data // should read from or written to by process() function. // The releaseBuffer() function MUST be called when the buffer retrieved // with getBuffer() is not needed anymore. // The process function should use the buffer provider mechanism to retrieve // input or output buffer if the inBuffer or outBuffer passed as argument is NULL // and the buffer configuration (buffer_config_t) given by the EFFECT_CMD_SET_CONFIG // command did not specify an audio buffer. typedef int32_t (* buffer_function_t)(void *cookie, audio_buffer_t *buffer); typedef struct buffer_provider_s { buffer_function_t getBuffer; // retrieve next buffer buffer_function_t releaseBuffer; // release used buffer void *cookie; // for use by client of buffer provider functions } buffer_provider_t; // The buffer_config_s structure specifies the input or output audio format // to be used by the effect engine. It is part of the effect_config_t // structure that defines both input and output buffer configurations and is // passed by the EFFECT_CMD_SET_CONFIG or EFFECT_CMD_SET_CONFIG_REVERSE command. typedef struct buffer_config_s { audio_buffer_t buffer; // buffer for use by process() function if not passed explicitly uint32_t samplingRate; // sampling rate uint32_t channels; // channel mask (see audio_channel_mask_t in audio.h) buffer_provider_t bufferProvider; // buffer provider uint8_t format; // Audio format (see see audio_format_t in audio.h) uint8_t accessMode; // read/write or accumulate in buffer (effect_buffer_access_e) uint16_t mask; // indicates which of the above fields is valid } buffer_config_t; // Values for "accessMode" field of buffer_config_t: // overwrite, read only, accumulate (read/modify/write) enum effect_buffer_access_e { EFFECT_BUFFER_ACCESS_WRITE, EFFECT_BUFFER_ACCESS_READ, EFFECT_BUFFER_ACCESS_ACCUMULATE }; // feature identifiers for EFFECT_CMD_GET_FEATURE_SUPPORTED_CONFIGS command enum effect_feature_e { EFFECT_FEATURE_AUX_CHANNELS, // supports auxiliary channels (e.g. dual mic noise suppressor) EFFECT_FEATURE_CNT }; // EFFECT_FEATURE_AUX_CHANNELS feature configuration descriptor. Describe a combination // of main and auxiliary channels supported typedef struct channel_config_s { audio_channel_mask_t main_channels; // channel mask for main channels audio_channel_mask_t aux_channels; // channel mask for auxiliary channels } channel_config_t; // Values for bit field "mask" in buffer_config_t. If a bit is set, the corresponding field // in buffer_config_t must be taken into account when executing the EFFECT_CMD_SET_CONFIG command #define EFFECT_CONFIG_BUFFER 0x0001 // buffer field must be taken into account #define EFFECT_CONFIG_SMP_RATE 0x0002 // samplingRate field must be taken into account #define EFFECT_CONFIG_CHANNELS 0x0004 // channels field must be taken into account #define EFFECT_CONFIG_FORMAT 0x0008 // format field must be taken into account #define EFFECT_CONFIG_ACC_MODE 0x0010 // accessMode field must be taken into account #define EFFECT_CONFIG_PROVIDER 0x0020 // bufferProvider field must be taken into account #define EFFECT_CONFIG_ALL (EFFECT_CONFIG_BUFFER | EFFECT_CONFIG_SMP_RATE | \ EFFECT_CONFIG_CHANNELS | EFFECT_CONFIG_FORMAT | \ EFFECT_CONFIG_ACC_MODE | EFFECT_CONFIG_PROVIDER) // effect_config_s structure describes the format of the pCmdData argument of EFFECT_CMD_SET_CONFIG // command to configure audio parameters and buffers for effect engine input and output. typedef struct effect_config_s { buffer_config_t inputCfg; buffer_config_t outputCfg; } effect_config_t; // effect_param_s structure describes the format of the pCmdData argument of EFFECT_CMD_SET_PARAM // command and pCmdData and pReplyData of EFFECT_CMD_GET_PARAM command. // psize and vsize represent the actual size of parameter and value. // // NOTE: the start of value field inside the data field is always on a 32 bit boundary: // // +-----------+ // | status | sizeof(int) // +-----------+ // | psize | sizeof(int) // +-----------+ // | vsize | sizeof(int) // +-----------+ // | | | | // ~ parameter ~ > psize | // | | | > ((psize - 1)/sizeof(int) + 1) * sizeof(int) // +-----------+ | // | padding | | // +-----------+ // | | | // ~ value ~ > vsize // | | | // +-----------+ typedef struct effect_param_s { int32_t status; // Transaction status (unused for command, used for reply) uint32_t psize; // Parameter size uint32_t vsize; // Value size char data[]; // Start of Parameter + Value data } effect_param_t; // structure used by EFFECT_CMD_OFFLOAD command typedef struct effect_offload_param_s { bool isOffload; // true if the playback thread the effect is attached to is offloaded int ioHandle; // io handle of the playback thread the effect is attached to } effect_offload_param_t; ///////////////////////////////////////////////// // Effect library interface ///////////////////////////////////////////////// // Effect library interface version 3.0 // Note that EffectsFactory.c only checks the major version component, so changes to the minor // number can only be used for fully backwards compatible changes #define EFFECT_LIBRARY_API_VERSION EFFECT_MAKE_API_VERSION(3,0) #define AUDIO_EFFECT_LIBRARY_TAG ((('A') << 24) | (('E') << 16) | (('L') << 8) | ('T')) // Every effect library must have a data structure named AUDIO_EFFECT_LIBRARY_INFO_SYM // and the fields of this data structure must begin with audio_effect_library_t typedef struct audio_effect_library_s { // tag must be initialized to AUDIO_EFFECT_LIBRARY_TAG uint32_t tag; // Version of the effect library API : 0xMMMMmmmm MMMM: Major, mmmm: minor uint32_t version; // Name of this library const char *name; // Author/owner/implementor of the library const char *implementor; //////////////////////////////////////////////////////////////////////////////// // // Function: create_effect // // Description: Creates an effect engine of the specified implementation uuid and // returns an effect control interface on this engine. The function will allocate the // resources for an instance of the requested effect engine and return // a handle on the effect control interface. // // Input: // uuid: pointer to the effect uuid. // sessionId: audio session to which this effect instance will be attached. All effects // created with the same session ID are connected in series and process the same signal // stream. Knowing that two effects are part of the same effect chain can help the // library implement some kind of optimizations. // ioId: identifies the output or input stream this effect is directed to at audio HAL. // For future use especially with tunneled HW accelerated effects // // Input/Output: // pHandle: address where to return the effect interface handle. // // Output: // returned value: 0 successful operation. // -ENODEV library failed to initialize // -EINVAL invalid pEffectUuid or pHandle // -ENOENT no effect with this uuid found // *pHandle: updated with the effect interface handle. // //////////////////////////////////////////////////////////////////////////////// int32_t (*create_effect)(const effect_uuid_t *uuid, int32_t sessionId, int32_t ioId, effect_handle_t *pHandle); //////////////////////////////////////////////////////////////////////////////// // // Function: release_effect // // Description: Releases the effect engine whose handle is given as argument. // All resources allocated to this particular instance of the effect are // released. // // Input: // handle: handle on the effect interface to be released. // // Output: // returned value: 0 successful operation. // -ENODEV library failed to initialize // -EINVAL invalid interface handle // //////////////////////////////////////////////////////////////////////////////// int32_t (*release_effect)(effect_handle_t handle); //////////////////////////////////////////////////////////////////////////////// // // Function: get_descriptor // // Description: Returns the descriptor of the effect engine which implementation UUID is // given as argument. // // Input/Output: // uuid: pointer to the effect uuid. // pDescriptor: address where to return the effect descriptor. // // Output: // returned value: 0 successful operation. // -ENODEV library failed to initialize // -EINVAL invalid pDescriptor or uuid // *pDescriptor: updated with the effect descriptor. // //////////////////////////////////////////////////////////////////////////////// int32_t (*get_descriptor)(const effect_uuid_t *uuid, effect_descriptor_t *pDescriptor); } audio_effect_library_t; // Name of the hal_module_info #define AUDIO_EFFECT_LIBRARY_INFO_SYM AELI // Name of the hal_module_info as a string #define AUDIO_EFFECT_LIBRARY_INFO_SYM_AS_STR "AELI" __END_DECLS #endif // ANDROID_AUDIO_EFFECT_H