audio_usb.h

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/*
 * Copyright (c) 2018 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */
 
#ifndef _AUDIO_USB_H_
#define _AUDIO_USB_H_
 
#include <zephyr/kernel.h>
#include <zephyr/usb/usbd.h>
 
#if (CONFIG_AUDIO_SOURCE_USB && !CONFIG_AUDIO_SAMPLE_RATE_48000_HZ &&                              \
        MAX(CONFIG_AUDIO_INPUT_CHANNELS, CONFIG_AUDIO_OUTPUT_CHANNELS) != 2)
/* Only 48kHz stereo is supported when using USB */
#error USB only supports 48kHz stereo
#endif /* (CONFIG_AUDIO_SOURCE_USB && !CONFIG_AUDIO_SAMPLE_RATE_48000_HZ) */
 
#define USB_1MS_BLOCKS_NUM_MAX                                                                     \
        ((CONFIG_AUDIO_FRAME_DURATION_US / USEC_PER_MSEC) +                                        \
         (CONFIG_AUDIO_FRAME_DURATION_US % USEC_PER_MSEC ? 1 : 0))
#define USB_BLOCK_1MS_MONO_SIZE                                                                    \
        (CONFIG_AUDIO_SAMPLE_RATE_HZ * CONFIG_AUDIO_BIT_DEPTH_OCTETS / MSEC_PER_SEC)
#define USB_BLOCK_MULTI_CHAN_1MS_SIZE                                                              \
        (USB_BLOCK_1MS_MONO_SIZE * MAX(CONFIG_AUDIO_INPUT_CHANNELS, CONFIG_AUDIO_OUTPUT_CHANNELS))
 
struct usbd_context *audio_usbd_init_device(usbd_msg_cb_t msg_cb);
 
bool audio_usb_headphones_out_enabled(void);
 
bool audio_usb_headset_out_enabled(void);
 
bool audio_usb_headset_in_enabled(void);
 
int audio_usb_start(struct k_msgq *audio_q_out_ptr, struct k_msgq *audio_q_in_ptr);
 
int audio_usb_stop(void);
 
int audio_usb_disable(void);
 
int audio_usb_init(bool host_in, bool host_out);
 
#endif /* _AUDIO_USB_H_ */