347 lines
13 KiB
C
347 lines
13 KiB
C
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/**
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* Copyright (c) 2017 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef APP_USBD_AUDIO_H__
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#define APP_USBD_AUDIO_H__
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#include <stdint.h>
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#include <stdbool.h>
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#include "nrf_drv_usbd.h"
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#include "app_usbd.h"
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#include "app_usbd_core.h"
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#include "app_usbd_class_base.h"
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#include "app_usbd_descriptor.h"
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#include "app_usbd_audio_types.h"
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#include "app_usbd_audio_desc.h"
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#include "app_usbd_audio_internal.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @defgroup app_usbd_audio USB AUDIO class
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* @ingroup app_usbd
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*
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* @brief @tagAPI52840 Module with types, definitions, and API used by USB Audio class.
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*
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* @details Reference specifications:
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* - "Universal Serial Bus Device Class Definition for Audio Devices"
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* Release 1.0, March 18, 1998.
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* - "Universal Serial Bus Device Class Definition for Audio Data Formats"
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* Release 1.0, March 18, 1998.
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* - "Universal Serial Bus Device Class Definition for Terminal Types"
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* Release 1.0, March 18, 1998.
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*
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* @{
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*/
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#ifdef DOXYGEN
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/**
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* @brief Audio class instance type
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*
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* @ref APP_USBD_CLASS_TYPEDEF
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*/
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typedef struct { } app_usbd_audio_t;
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#else
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/*lint -save -e10 -e26 -e123 -e505 */
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APP_USBD_CLASS_TYPEDEF(app_usbd_audio, \
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APP_USBD_AUDIO_CONFIG(0, 1), \
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APP_USBD_AUDIO_INSTANCE_SPECIFIC_DEC, \
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APP_USBD_AUDIO_DATA_SPECIFIC_DEC \
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);
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/*lint -restore*/
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#endif
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/*lint -save -e407 */
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/**
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* @brief Events passed to user event handler
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*
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* @note Example prototype of user event handler:
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*
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* @code
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void audio_user_ev_handler(app_usbd_class_inst_t const * p_inst,
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app_usbd_audio_user_event_t event);
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* @endcode
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*/
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typedef enum app_usbd_audio_user_event_e {
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APP_USBD_AUDIO_USER_EVT_CLASS_REQ, /**< User event CLASS_REQ */
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APP_USBD_AUDIO_USER_EVT_RX_DONE, /**< User event RX_DONE */
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APP_USBD_AUDIO_USER_EVT_TX_DONE, /**< User event TX_DONE */
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} app_usbd_audio_user_event_t;
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/*lint -restore*/
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/**
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* @brief Global definition of app_usbd_audio_t class instance.
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*
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* @param instance_name Name of global instance.
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* @param interfaces_configs Interfaces configurations.
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* @param user_ev_handler User event handler.
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* @param format_descriptor Audio class Format descriptor.
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* @param input_descriptor Audio class Input Terminal descriptor.
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* @param output_descriptor Audio class Output Terminal descriptor.
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* @param feature_descriptor Audio class Feature Unit descriptor.
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* @param delay Streaming delay.
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* @param format FormatTag (@ref app_usbd_audio_as_iface_format_tag_t).
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* @param ep_size Endpoint size.
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* @param type_str Streaming type MIDISTREAMING/AUDIOSTREAMING.
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* @param terminal_link Terminal link in AS Interface Descriptor.
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*
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* @note This macro is just simplified version of @ref APP_USBD_AUDIO_GLOBAL_DEF_INTERNAL
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*
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*/
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#define APP_USBD_AUDIO_GLOBAL_DEF(instance_name, \
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interfaces_configs, \
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user_ev_handler, \
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format_descriptor, \
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input_descriptor, \
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output_descriptor, \
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feature_descriptor, \
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delay, \
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format, \
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ep_size, \
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type_str, \
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terminal_link) \
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APP_USBD_AUDIO_GLOBAL_DEF_INTERNAL(instance_name, \
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interfaces_configs, \
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user_ev_handler, \
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format_descriptor, \
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input_descriptor, \
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output_descriptor, \
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feature_descriptor, \
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delay, \
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format, \
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ep_size, \
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type_str, \
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terminal_link)
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/**
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* @brief Initializer of Audio Format descriptor.
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*
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* @param name Format descriptor name.
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* @param ... Format descriptor data.
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*/
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#define APP_USBD_AUDIO_FORMAT_DESCRIPTOR(name, ...) \
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static uint8_t const CONCAT_2(name, _data)[] = \
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{ \
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__VA_ARGS__ \
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}; \
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static const app_usbd_audio_subclass_desc_t name = \
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{ \
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sizeof(CONCAT_2(name, _data)), \
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APP_USBD_AUDIO_AS_IFACE_SUBTYPE_FORMAT_TYPE, \
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CONCAT_2(name,_data) \
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}
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/**
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* @brief Initializer of Audio Input descriptor.
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*
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* @param name Input descriptor name.
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* @param ... Input descriptor data.
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*/
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#define APP_USBD_AUDIO_INPUT_DESCRIPTOR(name, ...) \
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static uint8_t const CONCAT_2(name, _data)[] = \
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{ \
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__VA_ARGS__ \
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}; \
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static const app_usbd_audio_subclass_desc_t name = \
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{ \
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sizeof(CONCAT_2(name, _data)), \
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APP_USBD_AUDIO_AC_IFACE_SUBTYPE_INPUT_TERMINAL, \
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CONCAT_2(name,_data) \
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}
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/**
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* @brief Initializer of Audio Output descriptor.
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*
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* @param name Output descriptor name.
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* @param ... Output descriptor data.
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*/
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#define APP_USBD_AUDIO_OUTPUT_DESCRIPTOR(name, ...) \
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static uint8_t const CONCAT_2(name, _data)[] = \
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{ \
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__VA_ARGS__ \
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}; \
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static const app_usbd_audio_subclass_desc_t name = \
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{ \
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sizeof(CONCAT_2(name, _data)), \
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APP_USBD_AUDIO_AC_IFACE_SUBTYPE_OUTPUT_TERMINAL, \
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CONCAT_2(name,_data) \
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}
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/**
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* @brief Initializer of Feture Output descriptor.
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*
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* @param name Feture descriptor name.
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* @param ... Feture descriptor data.
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*/
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#define APP_USBD_AUDIO_FEATURE_DESCRIPTOR(name, ...) \
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static uint8_t const CONCAT_2(name, _data)[] = \
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{ \
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__VA_ARGS__ \
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}; \
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static const app_usbd_audio_subclass_desc_t name = \
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{ \
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sizeof(CONCAT_2(name, _data)), \
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APP_USBD_AUDIO_AC_IFACE_SUBTYPE_FEATURE_UNIT, \
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CONCAT_2(name,_data) \
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}
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/**
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* @@brief Helper function to get class instance from Audio class.
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*
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* @param[in] p_audio Audio class instance (declared by @ref APP_USBD_AUDIO_GLOBAL_DEF).
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* @return Base class instance.
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*/
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static inline app_usbd_class_inst_t const *
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app_usbd_audio_class_inst_get(app_usbd_audio_t const * p_audio)
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{
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return &p_audio->base;
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}
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/**
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* @brief Helper function to get audio specific request from audio class.
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*
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* @param[in] p_audio Audio class instance (declared by @ref APP_USBD_AUDIO_GLOBAL_DEF).
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* @return Audio class specific request.
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*/
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static inline app_usbd_audio_req_t *
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app_usbd_audio_class_request_get(app_usbd_audio_t const * p_audio)
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{
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return &p_audio->specific.p_data->ctx.request;
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}
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/**
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* @brief Helper function to get audio from base class instance.
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*
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* @param[in] p_inst Base class instance.
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* @return Audio class handle.
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*/
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static inline app_usbd_audio_t const *
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app_usbd_audio_class_get(app_usbd_class_inst_t const * p_inst)
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{
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return (app_usbd_audio_t const *)p_inst;
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}
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/**
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* @brief Get the size of last received transfer.
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*
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* @note Call this function in reaction to a SOF event to check if there is any data to process.
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*
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* @param p_inst Base class instance.
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*
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* @return Number of bytes received in the last transmission.
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*/
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size_t app_usbd_audio_class_rx_size_get(app_usbd_class_inst_t const * p_inst);
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/**
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* @brief Start audio data copying from the endpoint buffer.
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*
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* Function to be used to copy data from an audio OUT endpoint to a given buffer.
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* When it finishes, an @ref APP_USBD_AUDIO_USER_EVT_RX_DONE event is generated.
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*
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* @param p_inst Base class instance.
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* @param p_buff Target buffer.
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* @param size Size of the requested data.
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*
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* @return Result of the endpoint transmission start.
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*
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* @sa app_usbd_audio_class_rx_size_get
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*
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* @note This function should be called in reaction to a SOF event.
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* Isochronous endpoints are double buffered and they are automatically switched at every SOF.
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*/
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ret_code_t app_usbd_audio_class_rx_start(
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app_usbd_class_inst_t const * p_inst,
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void * p_buff,
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size_t size);
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/**
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* @brief Start copying audio data to the endpoint buffer.
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*
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* Function to be used to copy data to an audio IN endpoint from a given buffer.
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* When it finishes, an @ref APP_USBD_AUDIO_USER_EVT_TX_DONE event is generated.
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*
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* @param p_inst Base class instance.
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* @param p_buff Source buffer.
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* @param size Size of the data to be sent.
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*
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* @return Result of the endpoint transsmision start.
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*
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* @note This function should be called in reaction to a SOF event.
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* Isochronous endpoints are double buffered and they are automatically switched at every SOF.
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*/
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ret_code_t app_usbd_audio_class_tx_start(
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app_usbd_class_inst_t const * p_inst,
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const void * p_buff,
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size_t size);
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/**
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* @brief Register audio instance as the one that requires SOF events in interrupt.
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*
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* This function should be called before appending the instance.
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*
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* @param p_inst Audio instance that requires SOF event.
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* @param handler Handler to SOF event
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*
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* @retval NRF_SUCCESS Instance linked into SOF processing list.
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*
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* @sa app_usbd_class_sof_interrupt_register
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*/
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ret_code_t app_usbd_audio_sof_interrupt_register(app_usbd_class_inst_t const * p_inst,
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app_usbd_sof_interrupt_handler_t handler);
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/** @} */
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#ifdef __cplusplus
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}
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#endif
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#endif /* APP_USBD_AUDIO_H__ */
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