le_audio.h

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/*
 * Copyright (c) 2023 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */
 
#ifndef _LE_AUDIO_H_
#define _LE_AUDIO_H_
 
#include <zephyr/bluetooth/audio/bap.h>
#include <audio_defines.h>
 
#define LE_AUDIO_ZBUS_EVENT_WAIT_TIME     K_MSEC(5)
#define LE_AUDIO_SDU_SIZE_OCTETS(bitrate) (bitrate / (1000000 / CONFIG_AUDIO_FRAME_DURATION_US) / 8)
 
#if CONFIG_SAMPLE_RATE_CONVERTER && CONFIG_AUDIO_SAMPLE_RATE_48000_HZ
#define BT_AUDIO_CODEC_CAPABILIY_FREQ                                                              \
        BT_AUDIO_CODEC_CAP_FREQ_48KHZ | BT_AUDIO_CODEC_CAP_FREQ_24KHZ |                            \
                BT_AUDIO_CODEC_CAP_FREQ_16KHZ
 
#elif CONFIG_AUDIO_SAMPLE_RATE_16000_HZ
#define BT_AUDIO_CODEC_CAPABILIY_FREQ BT_AUDIO_CODEC_CAP_FREQ_16KHZ
 
#elif CONFIG_AUDIO_SAMPLE_RATE_24000_HZ
#define BT_AUDIO_CODEC_CAPABILIY_FREQ BT_AUDIO_CODEC_CAP_FREQ_24KHZ
 
#elif CONFIG_AUDIO_SAMPLE_RATE_48000_HZ
#define BT_AUDIO_CODEC_CAPABILIY_FREQ BT_AUDIO_CODEC_CAP_FREQ_48KHZ
 
#else
#error No sample rate supported
#endif /* CONFIG_SAMPLE_RATE_CONVERTER */
 
#define BT_BAP_LC3_PRESET_CONFIGURABLE(_loc, _stream_context, _bitrate)                            \
        BT_BAP_LC3_PRESET(BT_AUDIO_CODEC_LC3_CONFIG(CONFIG_BT_AUDIO_PREF_SAMPLE_RATE_VALUE,        \
                                                    BT_AUDIO_CODEC_CFG_DURATION_10, _loc,          \
                                                    LE_AUDIO_SDU_SIZE_OCTETS(_bitrate), 1,         \
                                                    _stream_context),                              \
                          BT_AUDIO_CODEC_QOS_UNFRAMED(10000u, LE_AUDIO_SDU_SIZE_OCTETS(_bitrate),  \
                                                      CONFIG_BT_AUDIO_RETRANSMITS,                 \
                                                      CONFIG_BT_AUDIO_MAX_TRANSPORT_LATENCY_MS,    \
                                                      CONFIG_BT_AUDIO_PRESENTATION_DELAY_US))
 
typedef void (*le_audio_receive_cb)(const uint8_t *const data, size_t size, bool bad_frame,
                                    uint32_t sdu_ref, enum audio_channel channel_index,
                                    size_t desired_size);
 
struct le_audio_encoded_audio {
        uint8_t const *const data;
        size_t size;
        uint8_t num_ch;
};
 
struct stream_index {
        uint8_t lvl1; /* BIG / CIG */
        uint8_t lvl2; /* Subgroups (only applicable to Broadcast) */
        uint8_t lvl3; /* BIS / CIS */
};
 
int le_audio_ep_state_get(struct bt_bap_ep *ep, uint8_t *state);
 
bool le_audio_ep_state_check(struct bt_bap_ep *ep, enum bt_bap_ep_state state);
 
bool le_audio_ep_qos_configured(struct bt_bap_ep const *const ep);
 
int le_audio_freq_hz_get(const struct bt_audio_codec_cfg *codec, int *freq_hz);
 
int le_audio_duration_us_get(const struct bt_audio_codec_cfg *codec, int *frame_dur_us);
 
int le_audio_octets_per_frame_get(const struct bt_audio_codec_cfg *codec, uint32_t *octets_per_sdu);
 
int le_audio_frame_blocks_per_sdu_get(const struct bt_audio_codec_cfg *codec,
                                      uint32_t *frame_blks_per_sdu);
 
int le_audio_bitrate_get(const struct bt_audio_codec_cfg *const codec, uint32_t *bitrate);
 
int le_audio_stream_dir_get(struct bt_bap_stream const *const stream);
 
bool le_audio_bitrate_check(const struct bt_audio_codec_cfg *codec);
 
bool le_audio_freq_check(const struct bt_audio_codec_cfg *codec);
 
void le_audio_print_codec(const struct bt_audio_codec_cfg *codec, enum bt_audio_dir dir);
 
#endif /* _LE_AUDIO_H_ */