ble_tss.h

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/*
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  are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice, this
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  2. Redistributions in binary form, except as embedded into a Nordic
     Semiconductor ASA integrated circuit in a product or a software update for
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  3. Neither the name of Nordic Semiconductor ASA nor the names of its
     contributors may be used to endorse or promote products derived from this
     software without specific prior written permission.

  4. This software, with or without modification, must only be used with a
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 */

#ifndef BLE_TSS_H__
#define BLE_TSS_H__

#include "ble.h"
#include "ble_srv_common.h"
#include "app_util_platform.h"
#include "drv_audio_config.h"
#include <stdint.h>
#include <stdbool.h>

#define BLE_UUID_TSS_SERVICE 0x0500                      
#define BLE_TSS_MAX_DATA_LEN (BLE_GATT_ATT_MTU_DEFAULT - 3) 
#ifdef __GNUC__
    #ifdef PACKED
        #undef PACKED
    #endif

    #define PACKED(TYPE) TYPE __attribute__ ((packed))
#endif

#define BLE_TSS_SPKR_STAT_FINISHED           0x00
#define BLE_TSS_SPKR_STAT_BUFFER_WARNING     0x01
#define BLE_TSS_SPKR_STAT_BUFFER_READY       0x02
#define BLE_TSS_SPKR_STAT_PACKET_DISREGARDED 0x10
#define BLE_TSS_SPKR_STAT_INVALID_COMMAND    0x11

#define BLE_TSS_MIC_FRAME_SIZE               CONFIG_AUDIO_FRAME_SIZE_BYTES

typedef uint8_t ble_tss_spkr_stat_t;

typedef uint8_t ble_tss_spkr_sample_t;

typedef PACKED( struct
{
    uint16_t freq;
    uint16_t duration_ms;
    uint8_t  volume;
}) ble_tss_spkr_freq_t;

typedef PACKED( union
{
    ble_tss_spkr_freq_t   freq;
    uint8_t               pcm[273];
    ble_tss_spkr_sample_t sample_id;
}) ble_tss_spkr_t;

typedef PACKED( union
{
    uint8_t spl;
    uint8_t raw[BLE_TSS_MIC_FRAME_SIZE];
}) ble_tss_mic_t;

typedef enum
{
    BLE_TSS_SPKR_MODE_FIRST,
    BLE_TSS_SPKR_MODE_FREQ,
    BLE_TSS_SPKR_MODE_PCM,
    BLE_TSS_SPKR_MODE_SAMPLE,
    BLE_TSS_SPKR_MODE_LAST
} ble_tss_spkr_mode_t;

typedef enum
{
    BLE_TSS_MIC_MODE_FIRST,
    BLE_TSS_MIC_MODE_ADPCM,
    BLE_TSS_MIC_MODE_SPL,
    BLE_TSS_MIC_MODE_LAST
} ble_tss_mic_mode_t;

typedef PACKED( struct
{
    ble_tss_spkr_mode_t spkr_mode;
    ble_tss_mic_mode_t  mic_mode;
}) ble_tss_config_t;

#define BLE_TSS_CONFIG_SPKR_MODE_MIN      (BLE_TSS_SPKR_MODE_FIRST + 1)
#define BLE_TSS_CONFIG_SPKR_MODE_MAX      (BLE_TSS_SPKR_MODE_LAST - 1)
#define BLE_TSS_CONFIG_MIC_MODE_MIN       (BLE_TSS_MIC_MODE_FIRST + 1)
#define BLE_TSS_CONFIG_MIC_MODE_MAX       (BLE_TSS_MIC_MODE_LAST - 1)

typedef enum
{
    BLE_TSS_EVT_NOTIF_MIC,
    BLE_TSS_EVT_CONFIG_RECEIVED,
    BLE_TSS_EVT_SPKR_RECEIVED,
    BLE_TSS_EVT_NOTIF_SPKR_STAT
}ble_tss_evt_type_t;

/* Forward declaration of the ble_tss_t type. */
typedef struct ble_tss_s ble_tss_t;

typedef void (*ble_tss_evt_handler_t) (ble_tss_t        * p_tss,
                                       ble_tss_evt_type_t evt_type,
                                       uint8_t          * p_data,
                                       uint16_t           length);

typedef struct
{
    ble_tss_config_t      * p_init_config;
    ble_tss_evt_handler_t   evt_handler; 
} ble_tss_init_t;

struct ble_tss_s
{
    uint8_t                  uuid_type;                    
    uint16_t                 service_handle;               
    ble_gatts_char_handles_t spkr_handles;                 
    ble_gatts_char_handles_t mic_handles;                  
    ble_gatts_char_handles_t spkr_stat_handles;            
    ble_gatts_char_handles_t config_handles;               
    uint16_t                 conn_handle;                  
    bool                     is_mic_notif_enabled;         
    bool                     is_spkr_stat_notif_enabled;   
    ble_tss_evt_handler_t    evt_handler;                  
};

uint32_t ble_tss_init(ble_tss_t * p_tss, const ble_tss_init_t * p_tss_init);

void ble_tss_on_ble_evt(ble_tss_t * p_tss, ble_evt_t * p_ble_evt);

uint32_t ble_tss_mic_set(ble_tss_t * p_tss, uint8_t * p_data, uint16_t size);

uint32_t ble_tss_spkr_stat_set(ble_tss_t * p_tss, ble_tss_spkr_stat_t status);

#endif // BLE_TSS_H__