mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-30 05:35:31 +00:00
799 lines
39 KiB
C
799 lines
39 KiB
C
/*
|
|
* Copyright (C) 2010 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_EFFECTAPI_H_
|
|
#define ANDROID_EFFECTAPI_H_
|
|
|
|
#include <errno.h>
|
|
#include <stdint.h>
|
|
#include <sys/types.h>
|
|
|
|
#if __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/////////////////////////////////////////////////
|
|
// Effect control interface
|
|
/////////////////////////////////////////////////
|
|
|
|
// 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:
|
|
// struct effect_interface_s {
|
|
// effect_process_t process;
|
|
// effect_command_t command;
|
|
// };
|
|
|
|
|
|
// effect_interface_t: Effect control interface handle.
|
|
// The effect_interface_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_interface_t
|
|
typedef struct effect_interface_s **effect_interface_t;
|
|
|
|
|
|
// Effect API version 1.0
|
|
#define EFFECT_API_VERSION 0x0100 // Format 0xMMmm MM: Major version, mm: minor version
|
|
|
|
// Maximum length of character strings in structures defines by this API.
|
|
#define EFFECT_STRING_LEN_MAX 64
|
|
|
|
//
|
|
//--- 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;
|
|
|
|
// 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;
|
|
const effect_uuid_t * const EFFECT_UUID_NULL = &EFFECT_UUID_NULL_;
|
|
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
|
|
uint16_t apiVersion; // Version of the effect API implemented: matches EFFECT_API_VERSION
|
|
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..1 | 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 reserved
|
|
// +---------------------------+-----------+-----------------------------------
|
|
// | insertion preference | 2..4 | 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 | 5..6 | 0 none
|
|
// | | | 1 implements volume control
|
|
// | | | 2 requires volume indication
|
|
// | | | 3 reserved
|
|
// +---------------------------+-----------+-----------------------------------
|
|
// | Device indication | 7..8 | 0 none
|
|
// | | | 1 requires device updates
|
|
// | | | 2..3 reserved
|
|
// +---------------------------+-----------+-----------------------------------
|
|
// | Sample input mode | 9..10 | 0 direct: process() function or EFFECT_CMD_CONFIGURE
|
|
// | | | command must specify a buffer descriptor
|
|
// | | | 1 provider: process() function uses the
|
|
// | | | bufferProvider indicated by the
|
|
// | | | EFFECT_CMD_CONFIGURE command to request input.
|
|
// | | | buffers.
|
|
// | | | 2 both: both input modes are supported
|
|
// | | | 3 reserved
|
|
// +---------------------------+-----------+-----------------------------------
|
|
// | Sample output mode | 11..12 | 0 direct: process() function or EFFECT_CMD_CONFIGURE
|
|
// | | | command must specify a buffer descriptor
|
|
// | | | 1 provider: process() function uses the
|
|
// | | | bufferProvider indicated by the
|
|
// | | | EFFECT_CMD_CONFIGURE command to request output
|
|
// | | | buffers.
|
|
// | | | 2 both: both output modes are supported
|
|
// | | | 3 reserved
|
|
// +---------------------------+-----------+-----------------------------------
|
|
// | Hardware acceleration | 13..15 | 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 | 16..17 | 0 none
|
|
// | | | 1 requires audio mode updates
|
|
// | | | 2..3 reserved
|
|
// +---------------------------+-----------+-----------------------------------
|
|
|
|
// Insert mode
|
|
#define EFFECT_FLAG_TYPE_MASK 0x00000003
|
|
#define EFFECT_FLAG_TYPE_INSERT 0x00000000
|
|
#define EFFECT_FLAG_TYPE_AUXILIARY 0x00000001
|
|
#define EFFECT_FLAG_TYPE_REPLACE 0x00000002
|
|
|
|
// Insert preference
|
|
#define EFFECT_FLAG_INSERT_MASK 0x0000001C
|
|
#define EFFECT_FLAG_INSERT_ANY 0x00000000
|
|
#define EFFECT_FLAG_INSERT_FIRST 0x00000004
|
|
#define EFFECT_FLAG_INSERT_LAST 0x00000008
|
|
#define EFFECT_FLAG_INSERT_EXCLUSIVE 0x0000000C
|
|
|
|
|
|
// Volume control
|
|
#define EFFECT_FLAG_VOLUME_MASK 0x00000060
|
|
#define EFFECT_FLAG_VOLUME_CTRL 0x00000020
|
|
#define EFFECT_FLAG_VOLUME_IND 0x00000040
|
|
#define EFFECT_FLAG_VOLUME_NONE 0x00000000
|
|
|
|
// Device indication
|
|
#define EFFECT_FLAG_DEVICE_MASK 0x00000180
|
|
#define EFFECT_FLAG_DEVICE_IND 0x00000080
|
|
#define EFFECT_FLAG_DEVICE_NONE 0x00000000
|
|
|
|
// Sample input modes
|
|
#define EFFECT_FLAG_INPUT_MASK 0x00000600
|
|
#define EFFECT_FLAG_INPUT_DIRECT 0x00000000
|
|
#define EFFECT_FLAG_INPUT_PROVIDER 0x00000200
|
|
#define EFFECT_FLAG_INPUT_BOTH 0x00000400
|
|
|
|
// Sample output modes
|
|
#define EFFECT_FLAG_OUTPUT_MASK 0x00001800
|
|
#define EFFECT_FLAG_OUTPUT_DIRECT 0x00000000
|
|
#define EFFECT_FLAG_OUTPUT_PROVIDER 0x00000800
|
|
#define EFFECT_FLAG_OUTPUT_BOTH 0x00001000
|
|
|
|
// Hardware acceleration mode
|
|
#define EFFECT_FLAG_HW_ACC_MASK 0x00006000
|
|
#define EFFECT_FLAG_HW_ACC_SIMPLE 0x00002000
|
|
#define EFFECT_FLAG_HW_ACC_TUNNEL 0x00004000
|
|
|
|
// Audio mode indication
|
|
#define EFFECT_FLAG_AUDIO_MODE_MASK 0x00018000
|
|
#define EFFECT_FLAG_AUDIO_MODE_IND 0x00008000
|
|
#define EFFECT_FLAG_AUDIO_MODE_NONE 0x00000000
|
|
|
|
// Forward definition of type audio_buffer_t
|
|
typedef struct audio_buffer_s audio_buffer_t;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// 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_CONFIGURE 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:
|
|
// effect_interface_t: 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_CONFIGURE command.
|
|
//
|
|
// inBuffer: buffer descriptor indicating where to write processed samples.
|
|
// If NULL, use the configuration passed by EFFECT_CMD_CONFIGURE 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
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
typedef int32_t (*effect_process_t)(effect_interface_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:
|
|
// effect_interface_t: 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
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
typedef int32_t (*effect_command_t)(effect_interface_t self,
|
|
uint32_t cmdCode,
|
|
uint32_t cmdSize,
|
|
void *pCmdData,
|
|
uint32_t *replySize,
|
|
void *pReplyData);
|
|
|
|
|
|
// Effect control interface definition
|
|
struct effect_interface_s {
|
|
effect_process_t process;
|
|
effect_command_t command;
|
|
};
|
|
|
|
|
|
//
|
|
//--- Standardized command codes for command() function
|
|
//
|
|
enum effect_command_e {
|
|
EFFECT_CMD_INIT, // initialize effect engine
|
|
EFFECT_CMD_CONFIGURE, // 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_device_e)
|
|
EFFECT_CMD_SET_VOLUME, // set volume
|
|
EFFECT_CMD_SET_AUDIO_MODE, // set the audio mode (normal, ring, ...)
|
|
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_CONFIGURE
|
|
//--------------------------------------------------------------------------------------------------
|
|
// 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_device_e 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: audio_device_e
|
|
//--------------------------------------------------------------------------------------------------
|
|
// 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_e
|
|
//--------------------------------------------------------------------------------------------------
|
|
// reply format:
|
|
// size: 0
|
|
// data: N/A
|
|
//==================================================================================================
|
|
// 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_channels_e 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_CONFIGURE
|
|
// 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_CONFIGURE 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_channels_e)
|
|
buffer_provider_t bufferProvider; // buffer provider
|
|
uint8_t format; // Audio format (see audio_format_e)
|
|
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;
|
|
|
|
// Sample format
|
|
enum audio_format_e {
|
|
SAMPLE_FORMAT_PCM_S15, // PCM signed 16 bits
|
|
SAMPLE_FORMAT_PCM_U8, // PCM unsigned 8 bits
|
|
SAMPLE_FORMAT_PCM_S7_24, // PCM signed 7.24 fixed point representation
|
|
SAMPLE_FORMAT_OTHER // other format (e.g. compressed)
|
|
};
|
|
|
|
// Channel mask
|
|
enum audio_channels_e {
|
|
CHANNEL_FRONT_LEFT = 0x1, // front left channel
|
|
CHANNEL_FRONT_RIGHT = 0x2, // front right channel
|
|
CHANNEL_FRONT_CENTER = 0x4, // front center channel
|
|
CHANNEL_LOW_FREQUENCY = 0x8, // low frequency channel
|
|
CHANNEL_BACK_LEFT = 0x10, // back left channel
|
|
CHANNEL_BACK_RIGHT = 0x20, // back right channel
|
|
CHANNEL_FRONT_LEFT_OF_CENTER = 0x40, // front left of center channel
|
|
CHANNEL_FRONT_RIGHT_OF_CENTER = 0x80, // front right of center channel
|
|
CHANNEL_BACK_CENTER = 0x100, // back center channel
|
|
CHANNEL_MONO = CHANNEL_FRONT_LEFT,
|
|
CHANNEL_STEREO = (CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT),
|
|
CHANNEL_QUAD = (CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT |
|
|
CHANNEL_BACK_LEFT | CHANNEL_BACK_RIGHT),
|
|
CHANNEL_SURROUND = (CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT |
|
|
CHANNEL_FRONT_CENTER | CHANNEL_BACK_CENTER),
|
|
CHANNEL_5POINT1 = (CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT |
|
|
CHANNEL_FRONT_CENTER | CHANNEL_LOW_FREQUENCY | CHANNEL_BACK_LEFT | CHANNEL_BACK_RIGHT),
|
|
CHANNEL_7POINT1 = (CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT |
|
|
CHANNEL_FRONT_CENTER | CHANNEL_LOW_FREQUENCY | CHANNEL_BACK_LEFT | CHANNEL_BACK_RIGHT |
|
|
CHANNEL_FRONT_LEFT_OF_CENTER | CHANNEL_FRONT_RIGHT_OF_CENTER),
|
|
};
|
|
|
|
// Render device
|
|
enum audio_device_e {
|
|
DEVICE_EARPIECE = 0x1, // earpiece
|
|
DEVICE_SPEAKER = 0x2, // speaker
|
|
DEVICE_WIRED_HEADSET = 0x4, // wired headset, with microphone
|
|
DEVICE_WIRED_HEADPHONE = 0x8, // wired headphone, without microphone
|
|
DEVICE_BLUETOOTH_SCO = 0x10, // generic bluetooth SCO
|
|
DEVICE_BLUETOOTH_SCO_HEADSET = 0x20, // bluetooth SCO headset
|
|
DEVICE_BLUETOOTH_SCO_CARKIT = 0x40, // bluetooth SCO car kit
|
|
DEVICE_BLUETOOTH_A2DP = 0x80, // generic bluetooth A2DP
|
|
DEVICE_BLUETOOTH_A2DP_HEADPHONES = 0x100, // bluetooth A2DP headphones
|
|
DEVICE_BLUETOOTH_A2DP_SPEAKER = 0x200, // bluetooth A2DP speakers
|
|
DEVICE_AUX_DIGITAL = 0x400, // digital output
|
|
DEVICE_EXTERNAL_SPEAKER = 0x800 // external speaker (stereo and High quality)
|
|
};
|
|
|
|
#if ANDROID_VERSION < 17
|
|
// Audio mode
|
|
enum audio_mode_e {
|
|
AUDIO_MODE_NORMAL, // device idle
|
|
AUDIO_MODE_RINGTONE, // device ringing
|
|
AUDIO_MODE_IN_CALL // audio call connected (VoIP or telephony)
|
|
};
|
|
#endif
|
|
|
|
// 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
|
|
|
|
};
|
|
|
|
// 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_CONFIGURE 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_CONFIGURE
|
|
// 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;
|
|
|
|
|
|
/////////////////////////////////////////////////
|
|
// Effect library interface
|
|
/////////////////////////////////////////////////
|
|
|
|
// An effect library is required to implement and expose the following functions
|
|
// to enable effect enumeration and instantiation. The name of these functions must be as
|
|
// specified here as the effect framework will get the function address with dlsym():
|
|
//
|
|
// - effect_QueryNumberEffects_t EffectQueryNumberEffects;
|
|
// - effect_QueryEffect_t EffectQueryEffect;
|
|
// - effect_CreateEffect_t EffectCreate;
|
|
// - effect_ReleaseEffect_t EffectRelease;
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Function: EffectQueryNumberEffects
|
|
//
|
|
// Description: Returns the number of different effects exposed by the
|
|
// library. Each effect must have a unique effect uuid (see
|
|
// effect_descriptor_t). This function together with EffectQueryEffect()
|
|
// is used to enumerate all effects present in the library.
|
|
//
|
|
// Input/Output:
|
|
// pNumEffects: address where the number of effects should be returned.
|
|
//
|
|
// Output:
|
|
// returned value: 0 successful operation.
|
|
// -ENODEV library failed to initialize
|
|
// -EINVAL invalid pNumEffects
|
|
// *pNumEffects: updated with number of effects in library
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
typedef int32_t (*effect_QueryNumberEffects_t)(uint32_t *pNumEffects);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Function: EffectQueryEffect
|
|
//
|
|
// Description: Returns the descriptor of the effect engine which index is
|
|
// given as first argument.
|
|
// See effect_descriptor_t for details on effect descriptors.
|
|
// This function together with EffectQueryNumberEffects() is used to enumerate all
|
|
// effects present in the library. The enumeration sequence is:
|
|
// EffectQueryNumberEffects(&num_effects);
|
|
// for (i = 0; i < num_effects; i++)
|
|
// EffectQueryEffect(i,...);
|
|
//
|
|
// Input/Output:
|
|
// index: index of the effect
|
|
// pDescriptor: address where to return the effect descriptor.
|
|
//
|
|
// Output:
|
|
// returned value: 0 successful operation.
|
|
// -ENODEV library failed to initialize
|
|
// -EINVAL invalid pDescriptor or index
|
|
// -ENOSYS effect list has changed since last execution of
|
|
// EffectQueryNumberEffects()
|
|
// -ENOENT no more effect available
|
|
// *pDescriptor: updated with the effect descriptor.
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
typedef int32_t (*effect_QueryEffect_t)(uint32_t index,
|
|
effect_descriptor_t *pDescriptor);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Function: EffectCreate
|
|
//
|
|
// Description: Creates an effect engine of the specified type 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:
|
|
// pInterface: address where to return the effect interface.
|
|
//
|
|
// Output:
|
|
// returned value: 0 successful operation.
|
|
// -ENODEV library failed to initialize
|
|
// -EINVAL invalid pEffectUuid or pInterface
|
|
// -ENOENT no effect with this uuid found
|
|
// *pInterface: updated with the effect interface handle.
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
typedef int32_t (*effect_CreateEffect_t)(effect_uuid_t *uuid,
|
|
int32_t sessionId,
|
|
int32_t ioId,
|
|
effect_interface_t *pInterface);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Function: EffectRelease
|
|
//
|
|
// Description: Releases the effect engine whose handle is given as argument.
|
|
// All resources allocated to this particular instance of the effect are
|
|
// released.
|
|
//
|
|
// Input:
|
|
// interface: handle on the effect interface to be released.
|
|
//
|
|
// Output:
|
|
// returned value: 0 successful operation.
|
|
// -ENODEV library failed to initialize
|
|
// -EINVAL invalid interface handle
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
typedef int32_t (*effect_ReleaseEffect_t)(effect_interface_t interface);
|
|
|
|
|
|
#if __cplusplus
|
|
} // extern "C"
|
|
#endif
|
|
|
|
|
|
#endif /*ANDROID_EFFECTAPI_H_*/
|