484 lines
19 KiB
C
484 lines
19 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2020 Ha Thach (tinyusb.org)
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* Copyright (c) 2020 Reinhard Panhuber
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* This file is part of the TinyUSB stack.
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*/
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#ifndef _TUSB_AUDIO_DEVICE_H_
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#define _TUSB_AUDIO_DEVICE_H_
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#include "assert.h"
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#include "common/tusb_common.h"
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#include "device/usbd.h"
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#include "audio.h"
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//--------------------------------------------------------------------+
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// Class Driver Configuration
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//--------------------------------------------------------------------+
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// All sizes are in bytes!
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// Number of Standard AS Interface Descriptors (4.9.1) defined per audio function - this is required to be able to remember the current alternate settings of these interfaces - We restrict us here to have a constant number for all audio functions (which means this has to be the maximum number of AS interfaces an audio function has and a second audio function with less AS interfaces just waste a few bytes)
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#ifndef CFG_TUD_AUDIO_N_AS_INT
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#error You must tell the driver the number of Standard AS Interface Descriptors you have defined in the descriptors!
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#endif
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// Size of control buffer used to receive and send control messages via EP0 - has to be big enough to hold your biggest request structure e.g. range requests with multiple intervals defined or cluster descriptors
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#ifndef CFG_TUD_AUDIO_CTRL_BUF_SIZE
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#error You must define an audio class control request buffer size!
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#endif
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// End point sizes - Limits: Full Speed <= 1023, High Speed <= 1024
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#ifndef CFG_TUD_AUDIO_EPSIZE_IN
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#define CFG_TUD_AUDIO_EPSIZE_IN 0 // TX
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#endif
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#ifndef CFG_TUD_AUDIO_EPSIZE_OUT
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#define CFG_TUD_AUDIO_EPSIZE_OUT 0 // RX
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#endif
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// Software EP FIFO buffer sizes - must be >= EP SIZEs!
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#if CFG_TUD_AUDIO_EPSIZE_IN
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#ifndef CFG_TUD_AUDIO_EP_IN_SW_BUFFER_SIZE
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#define CFG_TUD_AUDIO_EP_IN_SW_BUFFER_SIZE CFG_TUD_AUDIO_EPSIZE_IN // TX
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#endif
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#endif
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#if CFG_TUD_AUDIO_EPSIZE_OUT
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#ifndef CFG_TUD_AUDIO_EP_OUT_SW_BUFFER_SIZE
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#define CFG_TUD_AUDIO_EP_OUT_SW_BUFFER_SIZE CFG_TUD_AUDIO_EPSIZE_OUT // RX
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#endif
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#endif
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// General information of number of TX and/or RX channels - is used in case support FIFOs (see below) are used and can be used for descriptor definitions
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#ifndef CFG_TUD_AUDIO_N_CHANNELS_TX
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#define CFG_TUD_AUDIO_N_CHANNELS_TX 0
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#endif
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#ifndef CFG_TUD_AUDIO_N_CHANNELS_RX
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#define CFG_TUD_AUDIO_N_CHANNELS_RX 0
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#endif
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// Use of TX/RX support FIFOs
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// Support FIFOs are not mandatory for the audio driver, rather they are intended to be of use in
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// - TX case: CFG_TUD_AUDIO_N_CHANNELS_TX channels need to be encoded into one USB output stream (currently PCM type I is implemented)
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// - RX case: CFG_TUD_AUDIO_N_CHANNELS_RX channels need to be decoded from a single USB input stream (currently PCM type I is implemented)
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//
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// This encoding/decoding is done in software and thus time consuming. If you can encode/decode your stream more efficiently do not use the
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// support FIFOs but write/read directly into/from the EP_X_SW_BUFFER_FIFOs using
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// - tud_audio_n_write() or
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// - tud_audio_n_read().
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// To write/read to/from the support FIFOs use
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// - tud_audio_n_write_support_ff() or
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// - tud_audio_n_read_support_ff().
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//
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// The encoding/decoding format type done is defined below.
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//
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// The encoding/decoding starts when the private callback functions
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// - audio_tx_done_cb()
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// - audio_rx_done_cb()
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// are invoked. If support FIFOs are used the corresponding encoding/decoding functions are called from there.
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// Once encoding/decoding is done the result is put directly into the EP_X_SW_BUFFER_FIFOs. You can use the public callback functions
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// - tud_audio_tx_done_pre_load_cb() or tud_audio_tx_done_post_load_cb()
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// - tud_audio_rx_done_pre_read_cb() or tud_audio_rx_done_post_read_cb()
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// if you want to get informed what happened.
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//
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// If you don't use the support FIFOs you may use the public callback functions
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// - tud_audio_tx_done_pre_load_cb() or tud_audio_tx_done_post_load_cb()
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// - tud_audio_rx_done_pre_read_cb() or tud_audio_rx_done_post_read_cb()
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// to write/read from/into the EP_X_SW_BUFFER_FIFOs at the right time.
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//
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// If you need a different encoding which is not support so far implement it in the
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// - audio_tx_done_cb()
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// - audio_rx_done_cb()
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// functions.
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// Size of support FIFOs - if size > 0 there are as many FIFOs set up as TX/RX channels defined
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#ifndef CFG_TUD_AUDIO_TX_SUPPORT_SW_FIFO_SIZE
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#define CFG_TUD_AUDIO_TX_SUPPORT_SW_FIFO_SIZE 0 // Buffer size per channel - minimum size: ceil(f_s/1000)*CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX
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#endif
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#ifndef CFG_TUD_AUDIO_RX_SUPPORT_SW_FIFO_SIZE
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#define CFG_TUD_AUDIO_RX_SUPPORT_SW_FIFO_SIZE 0 // Buffer size per channel - minimum size: ceil(f_s/1000)*CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_RX
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#endif
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// Enable/disable feedback EP (required for asynchronous RX applications)
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#ifndef CFG_TUD_AUDIO_ENABLE_FEEDBACK_EP
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#define CFG_TUD_AUDIO_ENABLE_FEEDBACK_EP 0 // Feedback - 0 or 1
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#endif
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// Audio interrupt control EP size - disabled if 0
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#ifndef CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN
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#define CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN 0 // Audio interrupt control - if required - 6 Bytes according to UAC 2 specification (p. 74)
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#endif
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#if CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN
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#ifndef CFG_TUD_AUDIO_INT_CTR_BUFSIZE
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#define CFG_TUD_AUDIO_INT_CTR_BUFSIZE 6 // Buffer size of audio control interrupt EP - 6 Bytes according to UAC 2 specification (p. 74)
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#endif
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#endif
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// Audio data format types - look in audio.h for existing types
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// Used in case support FIFOs are used
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#ifndef CFG_TUD_AUDIO_FORMAT_TYPE_TX
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#define CFG_TUD_AUDIO_FORMAT_TYPE_TX AUDIO_FORMAT_TYPE_UNDEFINED // If this option is used, an encoding function has to be implemented in audio_device.c
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#endif
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#ifndef CFG_TUD_AUDIO_FORMAT_TYPE_RX
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#define CFG_TUD_AUDIO_FORMAT_TYPE_RX AUDIO_FORMAT_TYPE_UNDEFINED // If this option is used, a decoding function has to be implemented in audio_device.c
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#endif
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// Audio data format type I specifications
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#if CFG_TUD_AUDIO_FORMAT_TYPE_TX == AUDIO_FORMAT_TYPE_I
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// Type definitions - for possible formats see: audio_data_format_type_I_t and further in UAC2 specifications.
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#ifndef CFG_TUD_AUDIO_FORMAT_TYPE_I_TX
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#define CFG_TUD_AUDIO_FORMAT_TYPE_I_TX AUDIO_DATA_FORMAT_TYPE_I_PCM
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#endif
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#ifndef CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX // bSubslotSize
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#define CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX 1
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#endif
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#ifndef CFG_TUD_AUDIO_TX_ITEMSIZE
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#if CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX == 1
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#define CFG_TUD_AUDIO_TX_ITEMSIZE 1
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#elif CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX == 2
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#define CFG_TUD_AUDIO_TX_ITEMSIZE 2
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#else
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#define CFG_TUD_AUDIO_TX_ITEMSIZE 4
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#endif
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#endif
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#if CFG_TUD_AUDIO_TX_ITEMSIZE < CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_TX
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#error FIFO element size (ITEMSIZE) must not be smaller then sample size
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#endif
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#endif
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#if CFG_TUD_AUDIO_FORMAT_TYPE_RX == AUDIO_FORMAT_TYPE_I
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#ifndef CFG_TUD_AUDIO_FORMAT_TYPE_I_RX
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#define CFG_TUD_AUDIO_FORMAT_TYPE_I_RX AUDIO_DATA_FORMAT_TYPE_I_PCM
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#endif
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#ifndef CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_RX // bSubslotSize
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#define CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_RX 1
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#endif
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#if CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_RX == 1
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#define CFG_TUD_AUDIO_RX_ITEMSIZE 1
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#elif CFG_TUD_AUDIO_N_BYTES_PER_SAMPLE_RX == 2
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#define CFG_TUD_AUDIO_RX_ITEMSIZE 2
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#else
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#define CFG_TUD_AUDIO_RX_ITEMSIZE 4
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#endif
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#endif
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//static_assert(sizeof(tud_audio_desc_lengths) != CFG_TUD_AUDIO, "Supply audio function descriptor pack length!");
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// Supported types of this driver:
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// AUDIO_DATA_FORMAT_TYPE_I_PCM - Required definitions: CFG_TUD_AUDIO_N_CHANNELS and CFG_TUD_AUDIO_BYTES_PER_CHANNEL
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** \addtogroup AUDIO_Serial Serial
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* @{
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* \defgroup AUDIO_Serial_Device Device
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* @{ */
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//--------------------------------------------------------------------+
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// Application API (Multiple Interfaces)
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// CFG_TUD_AUDIO > 1
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//--------------------------------------------------------------------+
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bool tud_audio_n_mounted (uint8_t itf);
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#if CFG_TUD_AUDIO_EP_OUT_SW_BUFFER_SIZE
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uint16_t tud_audio_n_available (uint8_t itf);
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uint16_t tud_audio_n_read (uint8_t itf, void* buffer, uint16_t bufsize);
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void tud_audio_n_clear_ep_out_ff (uint8_t itf); // Delete all content in the EP OUT FIFO
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#if CFG_TUD_AUDIO_RX_SUPPORT_SW_FIFO_SIZE
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void tud_audio_n_clear_rx_support_ff (uint8_t itf, uint8_t channelId); // Delete all content in the support RX FIFOs
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uint16_t tud_audio_n_available_support_ff (uint8_t itf, uint8_t channelId);
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uint16_t tud_audio_n_read_support_ff (uint8_t itf, uint8_t channelId, void* buffer, uint16_t bufsize);
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#endif
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#endif
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#if CFG_TUD_AUDIO_EP_IN_SW_BUFFER_SIZE
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uint16_t tud_audio_n_write (uint8_t itf, const void * data, uint16_t len);
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void tud_audio_n_clear_ep_in_ff (uint8_t itf); // Delete all content in the EP IN FIFO
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#if CFG_TUD_AUDIO_TX_SUPPORT_SW_FIFO_SIZE
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uint16_t tud_audio_n_flush_tx_support_ff (uint8_t itf); // Force all content in the support TX FIFOs to be written into EP SW FIFO
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uint16_t tud_audio_n_clear_tx_support_ff (uint8_t itf, uint8_t channelId);
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uint16_t tud_audio_n_write_support_ff (uint8_t itf, uint8_t channelId, const void * data, uint16_t len);
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#endif
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#endif
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#if CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN
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uint16_t tud_audio_int_ctr_n_available (uint8_t itf);
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uint16_t tud_audio_int_ctr_n_read (uint8_t itf, void* buffer, uint16_t bufsize);
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void tud_audio_int_ctr_n_clear (uint8_t itf); // Delete all content in the AUDIO_INT_CTR FIFO
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uint16_t tud_audio_int_ctr_n_write (uint8_t itf, uint8_t const* buffer, uint16_t len);
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#endif
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//--------------------------------------------------------------------+
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// Application API (Interface0)
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//--------------------------------------------------------------------+
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static inline bool tud_audio_mounted (void);
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// RX API
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#if CFG_TUD_AUDIO_EP_OUT_SW_BUFFER_SIZE
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static inline uint16_t tud_audio_available (void);
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static inline void tud_audio_clear_ep_out_ff (void); // Delete all content in the EP OUT FIFO
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static inline uint16_t tud_audio_read (void* buffer, uint16_t bufsize);
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#if CFG_TUD_AUDIO_RX_SUPPORT_SW_FIFO_SIZE
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static inline void tud_audio_clear_rx_support_ff (uint8_t channelId);
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static inline uint16_t tud_audio_available_support_ff (uint8_t channelId);
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static inline uint16_t tud_audio_read_support_ff (uint8_t channelId, void* buffer, uint16_t bufsize);
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#endif
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#endif
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// TX API
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#if CFG_TUD_AUDIO_EP_IN_SW_BUFFER_SIZE
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static inline uint16_t tud_audio_write (const void * data, uint16_t len);
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static inline uint16_t tud_audio_clear_ep_in_ff (void);
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#if CFG_TUD_AUDIO_TX_SUPPORT_SW_FIFO_SIZE
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static inline uint16_t tud_audio_flush_tx_support_ff (void);
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static inline uint16_t tud_audio_clear_tx_support_ff (uint8_t channelId);
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static inline uint16_t tud_audio_write_support_ff (uint8_t channelId, const void * data, uint16_t len);
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#endif
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#endif
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// INT CTR API
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#if CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN
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static inline uint16_t tud_audio_int_ctr_available (void);
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static inline uint16_t tud_audio_int_ctr_read (void* buffer, uint16_t bufsize);
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static inline void tud_audio_int_ctr_clear (void);
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static inline uint16_t tud_audio_int_ctr_write (uint8_t const* buffer, uint16_t len);
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#endif
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// Buffer control EP data and schedule a transmit
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// This function is intended to be used if you do not have a persistent buffer or memory location available (e.g. non-local variables) and need to answer onto a
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// get request. This function buffers your answer request frame into the control buffer of the corresponding audio driver and schedules a transmit for sending it.
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// Since transmission is triggered via interrupts, a persistent memory location is required onto which the buffer pointer in pointing. If you already have such
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// available you may directly use 'tud_control_xfer(...)'. In this case data does not need to be copied into an additional buffer and you save some time.
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// If the request's wLength is zero, a status packet is sent instead.
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bool tud_audio_buffer_and_schedule_control_xfer(uint8_t rhport, tusb_control_request_t const * p_request, void* data, uint16_t len);
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//--------------------------------------------------------------------+
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// Application Callback API (weak is optional)
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//--------------------------------------------------------------------+
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#if CFG_TUD_AUDIO_EP_IN_SW_BUFFER_SIZE
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TU_ATTR_WEAK bool tud_audio_tx_done_pre_load_cb(uint8_t rhport, uint8_t itf, uint8_t ep_in, uint8_t cur_alt_setting);
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TU_ATTR_WEAK bool tud_audio_tx_done_post_load_cb(uint8_t rhport, uint16_t n_bytes_copied, uint8_t itf, uint8_t ep_in, uint8_t cur_alt_setting);
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#endif
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#if CFG_TUD_AUDIO_EP_OUT_SW_BUFFER_SIZE
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TU_ATTR_WEAK bool tud_audio_rx_done_pre_read_cb(uint8_t rhport, uint8_t itf, uint8_t ep_out, uint8_t cur_alt_setting);
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TU_ATTR_WEAK bool tud_audio_rx_done_post_read_cb(uint8_t rhport, uint16_t n_bytes_copied, uint8_t itf, uint8_t ep_out, uint8_t cur_alt_setting);
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#endif
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#if CFG_TUD_AUDIO_EP_OUT_SW_BUFFER_SIZE && CFG_TUD_AUDIO_ENABLE_FEEDBACK_EP
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TU_ATTR_WEAK bool tud_audio_fb_done_cb(uint8_t rhport);
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// User code should call this function with feedback value in 16.16 format for FS and HS.
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// Value will be corrected for FS to 10.14 format automatically.
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// (see Universal Serial Bus Specification Revision 2.0 5.12.4.2).
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// Feedback value will be sent at FB endpoint interval till it's changed.
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bool tud_audio_fb_set(uint8_t rhport, uint32_t feedback);
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#endif
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#if CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN
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TU_ATTR_WEAK bool tud_audio_int_ctr_done_cb(uint8_t rhport, uint16_t * n_bytes_copied);
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#endif
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// Invoked when audio set interface request received
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TU_ATTR_WEAK bool tud_audio_set_itf_cb(uint8_t rhport, tusb_control_request_t const * p_request);
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// Invoked when audio set interface request received which closes an EP
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TU_ATTR_WEAK bool tud_audio_set_itf_close_EP_cb(uint8_t rhport, tusb_control_request_t const * p_request);
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// Invoked when audio class specific set request received for an EP
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TU_ATTR_WEAK bool tud_audio_set_req_ep_cb(uint8_t rhport, tusb_control_request_t const * p_request, uint8_t *pBuff);
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// Invoked when audio class specific set request received for an interface
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TU_ATTR_WEAK bool tud_audio_set_req_itf_cb(uint8_t rhport, tusb_control_request_t const * p_request, uint8_t *pBuff);
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// Invoked when audio class specific set request received for an entity
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TU_ATTR_WEAK bool tud_audio_set_req_entity_cb(uint8_t rhport, tusb_control_request_t const * p_request, uint8_t *pBuff);
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// Invoked when audio class specific get request received for an EP
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TU_ATTR_WEAK bool tud_audio_get_req_ep_cb(uint8_t rhport, tusb_control_request_t const * p_request);
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// Invoked when audio class specific get request received for an interface
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TU_ATTR_WEAK bool tud_audio_get_req_itf_cb(uint8_t rhport, tusb_control_request_t const * p_request);
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// Invoked when audio class specific get request received for an entity
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TU_ATTR_WEAK bool tud_audio_get_req_entity_cb(uint8_t rhport, tusb_control_request_t const * p_request);
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//--------------------------------------------------------------------+
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// Inline Functions
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//--------------------------------------------------------------------+
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static inline bool tud_audio_mounted(void)
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{
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return tud_audio_n_mounted(0);
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}
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// RX API
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#if CFG_TUD_AUDIO_EP_OUT_SW_BUFFER_SIZE
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static inline uint16_t tud_audio_available (void)
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{
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return tud_audio_n_available(0);
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}
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static inline uint16_t tud_audio_read (void* buffer, uint16_t bufsize)
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{
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return tud_audio_n_read(0, buffer, bufsize);
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}
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static inline uint16_t tud_audio_clear_ep_out_ff (void)
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{
|
|
return tud_audio_n_clear_ep_out_ff(0);
|
|
}
|
|
|
|
#if CFG_TUD_AUDIO_RX_SUPPORT_SW_FIFO_SIZE
|
|
|
|
static inline void tud_audio_clear_rx_support_ff (uint8_t channelId)
|
|
{
|
|
tud_audio_n_clear_rx_support_ff(0, channelId);
|
|
}
|
|
|
|
static inline uint16_t tud_audio_available_support_ff (uint8_t channelId)
|
|
{
|
|
return tud_audio_n_available_support_ff(0, channelId);
|
|
}
|
|
|
|
static inline uint16_t tud_audio_read_support_ff (uint8_t channelId, void* buffer, uint16_t bufsize)
|
|
{
|
|
return tud_audio_n_read_support_ff(0, channelId, buffer, bufsize);
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|
|
|
|
// TX API
|
|
|
|
#if CFG_TUD_AUDIO_EP_IN_SW_BUFFER_SIZE
|
|
|
|
static inline uint16_t tud_audio_write (const void * data, uint16_t len)
|
|
{
|
|
return tud_audio_n_write(0, data, len);
|
|
}
|
|
|
|
static inline uint16_t tud_audio_clear_ep_in_ff (void)
|
|
{
|
|
return tud_audio_n_clear_ep_in_ff(0);
|
|
}
|
|
|
|
#if CFG_TUD_AUDIO_TX_SUPPORT_SW_FIFO_SIZE
|
|
|
|
static inline uint16_t tud_audio_flush_tx_support_ff (void)
|
|
{
|
|
return tud_audio_n_flush_tx_support_ff(0);
|
|
}
|
|
|
|
static inline uint16_t tud_audio_clear_tx_support_ff (uint8_t channelId)
|
|
{
|
|
return tud_audio_n_clear_tx_support_ff(0, channelId);
|
|
}
|
|
|
|
static inline uint16_t tud_audio_write_support_ff (uint8_t channelId, const void * data, uint16_t len)
|
|
{
|
|
return tud_audio_n_write_support_ff(0, channelId, data, len);
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#if CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN
|
|
static inline uint16_t tud_audio_int_ctr_available(void)
|
|
{
|
|
return tud_audio_int_ctr_n_available(0);
|
|
}
|
|
|
|
static inline uint16_t tud_audio_int_ctr_read(void* buffer, uint16_t bufsize)
|
|
{
|
|
return tud_audio_int_ctr_n_read(0, buffer, bufsize);
|
|
}
|
|
|
|
static inline void tud_audio_int_ctr_clear(void)
|
|
{
|
|
return tud_audio_int_ctr_n_clear(0);
|
|
}
|
|
|
|
static inline uint16_t tud_audio_int_ctr_write(uint8_t const* buffer, uint16_t len)
|
|
{
|
|
return tud_audio_int_ctr_n_write(0, buffer, len);
|
|
}
|
|
#endif
|
|
|
|
//--------------------------------------------------------------------+
|
|
// Internal Class Driver API
|
|
//--------------------------------------------------------------------+
|
|
void audiod_init (void);
|
|
void audiod_reset (uint8_t rhport);
|
|
uint16_t audiod_open (uint8_t rhport, tusb_desc_interface_t const * itf_desc, uint16_t max_len);
|
|
bool audiod_control_xfer_cb (uint8_t rhport, uint8_t stage, tusb_control_request_t const * request);
|
|
bool audiod_xfer_cb (uint8_t rhport, uint8_t edpt_addr, xfer_result_t result, uint32_t xferred_bytes);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _TUSB_AUDIO_DEVICE_H_ */
|
|
|
|
/** @} */
|
|
/** @} */
|