esp-idf/examples/bluetooth/a2dp_sink/main/bt_app_av.c
wangmengyang e07b43e924 component/bt: add AVRC event for remote features indication
1. remove the feature mask parameter from AVRC connection state event, as the AVCTP connection can be initiated by remote device before service discovery to remote device is performed. \
In this case, AVRCP connection state event may not be reported after connection initated by remote device is established.
2. remove ESP_AVRC_CT_MAX_EVT
3. add more documentations to AVRC APIs
2018-01-09 16:33:48 +08:00

197 lines
6.7 KiB
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"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/i2s.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)
{
i2s_write_bytes(0, (const char *)data, len, portMAX_DELAY);
if (++m_pkt_cnt % 100 == 0) {
ESP_LOGE(BT_AV_TAG, "audio data pkt cnt %u", m_pkt_cnt);
}
}
void bt_app_alloc_meta_buffer(esp_avrc_ct_cb_param_t *param)
{
esp_avrc_ct_cb_param_t *rc = (esp_avrc_ct_cb_param_t *)(param);
uint8_t *attr_text = (uint8_t *) malloc (rc->meta_rsp.attr_length + 1);
memcpy(attr_text, rc->meta_rsp.attr_text, rc->meta_rsp.attr_length);
attr_text[rc->meta_rsp.attr_length] = 0;
rc->meta_rsp.attr_text = attr_text;
}
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_METADATA_RSP_EVT:
bt_app_alloc_meta_buffer(param);
case ESP_AVRC_CT_CONNECTION_STATE_EVT:
case ESP_AVRC_CT_PASSTHROUGH_RSP_EVT:
case ESP_AVRC_CT_CHANGE_NOTIFY_EVT:
case ESP_AVRC_CT_REMOTE_FEATURES_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) {
int sample_rate = 16000;
char oct0 = a2d->audio_cfg.mcc.cie.sbc[0];
if (oct0 & (0x01 << 6)) {
sample_rate = 32000;
} else if (oct0 & (0x01 << 5)) {
sample_rate = 44100;
} else if (oct0 & (0x01 << 4)) {
sample_rate = 48000;
}
i2s_set_clk(0, sample_rate, 16, 2);
ESP_LOGI(BT_AV_TAG, "configure audio player %x-%x-%x-%x\n",
a2d->audio_cfg.mcc.cie.sbc[0],
a2d->audio_cfg.mcc.cie.sbc[1],
a2d->audio_cfg.mcc.cie.sbc[2],
a2d->audio_cfg.mcc.cie.sbc[3]);
ESP_LOGI(BT_AV_TAG, "audio player configured, samplerate=%d", sample_rate);
}
break;
}
default:
ESP_LOGE(BT_AV_TAG, "%s unhandled evt %d", __func__, event);
break;
}
}
static void bt_av_new_track()
{
//Register notifications and request metadata
esp_avrc_ct_send_metadata_cmd(0, ESP_AVRC_MD_ATTR_TITLE | ESP_AVRC_MD_ATTR_ARTIST | ESP_AVRC_MD_ATTR_ALBUM | ESP_AVRC_MD_ATTR_GENRE);
esp_avrc_ct_send_register_notification_cmd(1, ESP_AVRC_RN_TRACK_CHANGE, 0);
}
void bt_av_notify_evt_handler(uint8_t event_id, uint32_t event_parameter)
{
switch (event_id) {
case ESP_AVRC_RN_TRACK_CHANGE:
bt_av_new_track();
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, [%02x:%02x:%02x:%02x:%02x:%02x]",
rc->conn_stat.connected, bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
if (rc->conn_stat.connected) {
bt_av_new_track();
}
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;
}
case ESP_AVRC_CT_METADATA_RSP_EVT: {
ESP_LOGI(BT_AV_TAG, "avrc metadata rsp: attribute id 0x%x, %s", rc->meta_rsp.attr_id, rc->meta_rsp.attr_text);
free(rc->meta_rsp.attr_text);
break;
}
case ESP_AVRC_CT_CHANGE_NOTIFY_EVT: {
ESP_LOGI(BT_AV_TAG, "avrc event notification: %d, param: %d", rc->change_ntf.event_id, rc->change_ntf.event_parameter);
bt_av_notify_evt_handler(rc->change_ntf.event_id, rc->change_ntf.event_parameter);
break;
}
case ESP_AVRC_CT_REMOTE_FEATURES_EVT: {
ESP_LOGI(BT_AV_TAG, "avrc remote features %x", rc->rmt_feats.feat_mask);
break;
}
default:
ESP_LOGE(BT_AV_TAG, "%s unhandled evt %d", __func__, event);
break;
}
}