esp-idf/examples/bluetooth/a2dp_sink/main/bt_app_av.c

// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at

//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include "esp_log.h"

#include "bt_app_core.h"
#include "bt_app_av.h"
#include "esp_bt_main.h"
#include "esp_bt_device.h"
#include "esp_gap_bt_api.h"
#include "esp_a2dp_api.h"
#include "esp_avrc_api.h"

/* a2dp event handler */
static void bt_av_hdl_a2d_evt(uint16_t event, void *p_param);
/* avrc event handler */
static void bt_av_hdl_avrc_evt(uint16_t event, void *p_param);


static uint32_t m_pkt_cnt = 0;
static esp_a2d_audio_state_t m_audio_state = ESP_A2D_AUDIO_STATE_STOPPED;

/* callback for A2DP sink */
void bt_app_a2d_cb(esp_a2d_cb_event_t event, esp_a2d_cb_param_t *param)
{
    switch (event) {
    case ESP_A2D_CONNECTION_STATE_EVT:
    case ESP_A2D_AUDIO_STATE_EVT:
    case ESP_A2D_AUDIO_CFG_EVT: {
        bt_app_work_dispatch(bt_av_hdl_a2d_evt, event, param, sizeof(esp_a2d_cb_param_t), NULL);
        break;
    }
    default:
        ESP_LOGE(BT_AV_TAG, "a2dp invalid cb event: %d", event);
        break;
    }
}

void bt_app_a2d_data_cb(const uint8_t *data, uint32_t len)
{
    if (++m_pkt_cnt % 100 == 0) {
        ESP_LOGE(BT_AV_TAG, "audio data pkt cnt %u", m_pkt_cnt);
    }
}

void bt_app_rc_ct_cb(esp_avrc_ct_cb_event_t event, esp_avrc_ct_cb_param_t *param)
{
    switch (event) {
    case ESP_AVRC_CT_CONNECTION_STATE_EVT:
    case ESP_AVRC_CT_PASSTHROUGH_RSP_EVT: {
        bt_app_work_dispatch(bt_av_hdl_avrc_evt, event, param, sizeof(esp_avrc_ct_cb_param_t), NULL);
        break;
    }
    default:
        ESP_LOGE(BT_AV_TAG, "avrc invalid cb event: %d", event);
        break;
    }
}

static void bt_av_hdl_a2d_evt(uint16_t event, void *p_param)
{
    ESP_LOGD(BT_AV_TAG, "%s evt %d", __func__, event);
    esp_a2d_cb_param_t *a2d = NULL;
    switch (event) {
    case ESP_A2D_CONNECTION_STATE_EVT: {
        a2d = (esp_a2d_cb_param_t *)(p_param);
        ESP_LOGI(BT_AV_TAG, "a2dp conn_state_cb, state %d", a2d->conn_stat.state);
        break;
    }
    case ESP_A2D_AUDIO_STATE_EVT: {
        a2d = (esp_a2d_cb_param_t *)(p_param);
        ESP_LOGI(BT_AV_TAG, "a2dp audio_state_cb state %d", a2d->audio_stat.state);
        m_audio_state = a2d->audio_stat.state;
        if (ESP_A2D_AUDIO_STATE_STARTED == a2d->audio_stat.state) {
            m_pkt_cnt = 0;
        }
        break;
    }
    case ESP_A2D_AUDIO_CFG_EVT: {
        a2d = (esp_a2d_cb_param_t *)(p_param);
        ESP_LOGI(BT_AV_TAG, "a2dp audio_cfg_cb , codec type %d", a2d->audio_cfg.mcc.type);
        // for now only SBC stream is supported
        if (a2d->audio_cfg.mcc.type == ESP_A2D_MCT_SBC) {
            ESP_LOGI(BT_AV_TAG, "audio player configured");
        }
        break;
    }
    default:
        ESP_LOGE(BT_AV_TAG, "%s unhandled evt %d", __func__, event);
        break;
    }
}

static void bt_av_hdl_avrc_evt(uint16_t event, void *p_param)
{
    ESP_LOGD(BT_AV_TAG, "%s evt %d", __func__, event);
    esp_avrc_ct_cb_param_t *rc = (esp_avrc_ct_cb_param_t *)(p_param);
    switch (event) {
    case ESP_AVRC_CT_CONNECTION_STATE_EVT: {
        uint8_t *bda = rc->conn_stat.remote_bda;
        ESP_LOGI(BT_AV_TAG, "avrc conn_state evt: state %d, feature 0x%x, [%02x:%02x:%02x:%02x:%02x:%02x]",
                           rc->conn_stat.connected, rc->conn_stat.feat_mask, bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
        break;
    }
    case ESP_AVRC_CT_PASSTHROUGH_RSP_EVT: {
        ESP_LOGI(BT_AV_TAG, "avrc passthrough rsp: key_code 0x%x, key_state %d", rc->psth_rsp.key_code, rc->psth_rsp.key_state);
        break;
    }
    default:
        ESP_LOGE(BT_AV_TAG, "%s unhandled evt %d", __func__, event);
        break;
    }
}