/* * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Unlicense OR CC0-1.0 *//* ... */ #include <stdint.h> #include <stdbool.h> #include <stdlib.h> #include <string.h> #include <inttypes.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"15 includes #ifdef CONFIG_EXAMPLE_A2DP_SINK_OUTPUT_INTERNAL_DAC #include "driver/dac_continuous.h" #else #include "driver/i2s_std.h" #endif #include "sys/lock.h" /* AVRCP used transaction labels */ #define APP_RC_CT_TL_GET_CAPS (0) #define APP_RC_CT_TL_GET_META_DATA (1) #define APP_RC_CT_TL_RN_TRACK_CHANGE (2) #define APP_RC_CT_TL_RN_PLAYBACK_CHANGE (3) #define APP_RC_CT_TL_RN_PLAY_POS_CHANGE (4) /* Application layer causes delay value */ #define APP_DELAY_VALUE 50 // 5ms6 defines /******************************* * STATIC FUNCTION DECLARATIONS ******************************//* ... */ /* allocate new meta buffer */ static void bt_app_alloc_meta_buffer(esp_avrc_ct_cb_param_t *param); /* handler for new track is loaded */ static void bt_av_new_track(void); /* handler for track status change */ static void bt_av_playback_changed(void); /* handler for track playing position change */ static void bt_av_play_pos_changed(void); /* notification event handler */ static void bt_av_notify_evt_handler(uint8_t event_id, esp_avrc_rn_param_t *event_parameter); /* installation for i2s */ static void bt_i2s_driver_install(void); /* uninstallation for i2s */ static void bt_i2s_driver_uninstall(void); /* set volume by remote controller */ static void volume_set_by_controller(uint8_t volume); /* set volume by local host */ static void volume_set_by_local_host(uint8_t volume); /* simulation volume change */ static void volume_change_simulation(void *arg); /* a2dp event handler */ static void bt_av_hdl_a2d_evt(uint16_t event, void *p_param); /* avrc controller event handler */ static void bt_av_hdl_avrc_ct_evt(uint16_t event, void *p_param); /* avrc target event handler */ static void bt_av_hdl_avrc_tg_evt(uint16_t event, void *p_param); /******************************* * STATIC VARIABLE DEFINITIONS ******************************//* ... */ static uint32_t s_pkt_cnt = 0; /* count for audio packet */ static esp_a2d_audio_state_t s_audio_state = ESP_A2D_AUDIO_STATE_STOPPED; /* audio stream datapath state */ static const char *s_a2d_conn_state_str[] = {"Disconnected", "Connecting", "Connected", "Disconnecting"}; /* connection state in string */ static const char *s_a2d_audio_state_str[] = {"Suspended", "Started"}; /* audio stream datapath state in string */ static esp_avrc_rn_evt_cap_mask_t s_avrc_peer_rn_cap; /* AVRC target notification capability bit mask */ static _lock_t s_volume_lock; static TaskHandle_t s_vcs_task_hdl = NULL; /* handle for volume change simulation task */ static uint8_t s_volume = 0; /* local volume value */ static bool s_volume_notify; /* notify volume change or not */ #ifndef CONFIG_EXAMPLE_A2DP_SINK_OUTPUT_INTERNAL_DAC i2s_chan_handle_t tx_chan = NULL; #else dac_continuous_handle_t tx_chan; #endif /******************************** * STATIC FUNCTION DEFINITIONS *******************************//* ... */ static 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; }{ ... } static void bt_av_new_track(void) { /* request metadata */ uint8_t attr_mask = ESP_AVRC_MD_ATTR_TITLE | ESP_AVRC_MD_ATTR_ARTIST | ESP_AVRC_MD_ATTR_ALBUM | ESP_AVRC_MD_ATTR_GENRE; esp_avrc_ct_send_metadata_cmd(APP_RC_CT_TL_GET_META_DATA, attr_mask); /* register notification if peer support the event_id */ if (esp_avrc_rn_evt_bit_mask_operation(ESP_AVRC_BIT_MASK_OP_TEST, &s_avrc_peer_rn_cap, ESP_AVRC_RN_TRACK_CHANGE)) { esp_avrc_ct_send_register_notification_cmd(APP_RC_CT_TL_RN_TRACK_CHANGE, ESP_AVRC_RN_TRACK_CHANGE, 0); }{...} }{ ... } static void bt_av_playback_changed(void) { /* register notification if peer support the event_id */ if (esp_avrc_rn_evt_bit_mask_operation(ESP_AVRC_BIT_MASK_OP_TEST, &s_avrc_peer_rn_cap, ESP_AVRC_RN_PLAY_STATUS_CHANGE)) { esp_avrc_ct_send_register_notification_cmd(APP_RC_CT_TL_RN_PLAYBACK_CHANGE, ESP_AVRC_RN_PLAY_STATUS_CHANGE, 0); }{...} }{ ... } static void bt_av_play_pos_changed(void) { /* register notification if peer support the event_id */ if (esp_avrc_rn_evt_bit_mask_operation(ESP_AVRC_BIT_MASK_OP_TEST, &s_avrc_peer_rn_cap, ESP_AVRC_RN_PLAY_POS_CHANGED)) { esp_avrc_ct_send_register_notification_cmd(APP_RC_CT_TL_RN_PLAY_POS_CHANGE, ESP_AVRC_RN_PLAY_POS_CHANGED, 10); }{...} }{ ... } static void bt_av_notify_evt_handler(uint8_t event_id, esp_avrc_rn_param_t *event_parameter) { switch (event_id) { /* when new track is loaded, this event comes */ case ESP_AVRC_RN_TRACK_CHANGE: bt_av_new_track(); break; /* when track status changed, this event comes */... case ESP_AVRC_RN_PLAY_STATUS_CHANGE: ESP_LOGI(BT_AV_TAG, "Playback status changed: 0x%x", event_parameter->playback); bt_av_playback_changed(); break; /* when track playing position changed, this event comes */... case ESP_AVRC_RN_PLAY_POS_CHANGED: ESP_LOGI(BT_AV_TAG, "Play position changed: %"PRIu32"-ms", event_parameter->play_pos); bt_av_play_pos_changed(); break; /* others */... default: ESP_LOGI(BT_AV_TAG, "unhandled event: %d", event_id); break;... }{...} }{ ... } void bt_i2s_driver_install(void) { #ifdef CONFIG_EXAMPLE_A2DP_SINK_OUTPUT_INTERNAL_DAC dac_continuous_config_t cont_cfg = { .chan_mask = DAC_CHANNEL_MASK_ALL, .desc_num = 8, .buf_size = 2048, .freq_hz = 44100, .offset = 127, .clk_src = DAC_DIGI_CLK_SRC_DEFAULT, // Using APLL as clock source to get a wider frequency range .chan_mode = DAC_CHANNEL_MODE_ALTER, }{...}; /* Allocate continuous channels */ ESP_ERROR_CHECK(dac_continuous_new_channels(&cont_cfg, &tx_chan)); /* Enable the continuous channels */ ESP_ERROR_CHECK(dac_continuous_enable(tx_chan));/* ... */ #else i2s_chan_config_t chan_cfg = I2S_CHANNEL_DEFAULT_CONFIG(I2S_NUM_0, I2S_ROLE_MASTER); chan_cfg.auto_clear = true; i2s_std_config_t std_cfg = { .clk_cfg = I2S_STD_CLK_DEFAULT_CONFIG(44100), .slot_cfg = I2S_STD_MSB_SLOT_DEFAULT_CONFIG(I2S_DATA_BIT_WIDTH_16BIT, I2S_SLOT_MODE_STEREO), .gpio_cfg = { .mclk = I2S_GPIO_UNUSED, .bclk = CONFIG_EXAMPLE_I2S_BCK_PIN, .ws = CONFIG_EXAMPLE_I2S_LRCK_PIN, .dout = CONFIG_EXAMPLE_I2S_DATA_PIN, .din = I2S_GPIO_UNUSED, .invert_flags = { .mclk_inv = false, .bclk_inv = false, .ws_inv = false, }{...}, }{...}, }{...}; /* enable I2S */ ESP_ERROR_CHECK(i2s_new_channel(&chan_cfg, &tx_chan, NULL)); ESP_ERROR_CHECK(i2s_channel_init_std_mode(tx_chan, &std_cfg)); ESP_ERROR_CHECK(i2s_channel_enable(tx_chan));/* ... */ #endif }{ ... } void bt_i2s_driver_uninstall(void) { #ifdef CONFIG_EXAMPLE_A2DP_SINK_OUTPUT_INTERNAL_DAC ESP_ERROR_CHECK(dac_continuous_disable(tx_chan)); ESP_ERROR_CHECK(dac_continuous_del_channels(tx_chan));/* ... */ #else ESP_ERROR_CHECK(i2s_channel_disable(tx_chan)); ESP_ERROR_CHECK(i2s_del_channel(tx_chan));/* ... */ #endif }{ ... } static void volume_set_by_controller(uint8_t volume) { ESP_LOGI(BT_RC_TG_TAG, "Volume is set by remote controller to: %"PRIu32"%%", (uint32_t)volume * 100 / 0x7f); /* set the volume in protection of lock */ _lock_acquire(&s_volume_lock); s_volume = volume; _lock_release(&s_volume_lock); }{ ... } static void volume_set_by_local_host(uint8_t volume) { ESP_LOGI(BT_RC_TG_TAG, "Volume is set locally to: %"PRIu32"%%", (uint32_t)volume * 100 / 0x7f); /* set the volume in protection of lock */ _lock_acquire(&s_volume_lock); s_volume = volume; _lock_release(&s_volume_lock); /* send notification response to remote AVRCP controller */ if (s_volume_notify) { esp_avrc_rn_param_t rn_param; rn_param.volume = s_volume; esp_avrc_tg_send_rn_rsp(ESP_AVRC_RN_VOLUME_CHANGE, ESP_AVRC_RN_RSP_CHANGED, &rn_param); s_volume_notify = false; }{...} }{ ... } static void volume_change_simulation(void *arg) { ESP_LOGI(BT_RC_TG_TAG, "start volume change simulation"); for (;;) { /* volume up locally every 10 seconds */ vTaskDelay(10000 / portTICK_PERIOD_MS); uint8_t volume = (s_volume + 5) & 0x7f; volume_set_by_local_host(volume); }{...} }{ ... } static void bt_av_hdl_a2d_evt(uint16_t event, void *p_param) { ESP_LOGD(BT_AV_TAG, "%s event: %d", __func__, event); esp_a2d_cb_param_t *a2d = NULL; switch (event) { /* when connection state changed, this event comes */ case ESP_A2D_CONNECTION_STATE_EVT: { a2d = (esp_a2d_cb_param_t *)(p_param); uint8_t *bda = a2d->conn_stat.remote_bda; ESP_LOGI(BT_AV_TAG, "A2DP connection state: %s, [%02x:%02x:%02x:%02x:%02x:%02x]", s_a2d_conn_state_str[a2d->conn_stat.state], bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]); if (a2d->conn_stat.state == ESP_A2D_CONNECTION_STATE_DISCONNECTED) { esp_bt_gap_set_scan_mode(ESP_BT_CONNECTABLE, ESP_BT_GENERAL_DISCOVERABLE); bt_i2s_driver_uninstall(); bt_i2s_task_shut_down(); }{...} else if (a2d->conn_stat.state == ESP_A2D_CONNECTION_STATE_CONNECTED){ esp_bt_gap_set_scan_mode(ESP_BT_NON_CONNECTABLE, ESP_BT_NON_DISCOVERABLE); bt_i2s_task_start_up(); }{...} else if (a2d->conn_stat.state == ESP_A2D_CONNECTION_STATE_CONNECTING) { bt_i2s_driver_install(); }{...} break; }{...} /* when audio stream transmission state changed, this event comes */... case ESP_A2D_AUDIO_STATE_EVT: { a2d = (esp_a2d_cb_param_t *)(p_param); ESP_LOGI(BT_AV_TAG, "A2DP audio state: %s", s_a2d_audio_state_str[a2d->audio_stat.state]); s_audio_state = a2d->audio_stat.state; if (ESP_A2D_AUDIO_STATE_STARTED == a2d->audio_stat.state) { s_pkt_cnt = 0; }{...} break; }{...} /* when audio codec is configured, this event comes */... case ESP_A2D_AUDIO_CFG_EVT: { a2d = (esp_a2d_cb_param_t *)(p_param); ESP_LOGI(BT_AV_TAG, "A2DP audio stream configuration, 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; int ch_count = 2; 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; }{...} if (oct0 & (0x01 << 3)) { ch_count = 1; }{...} #ifdef CONFIG_EXAMPLE_A2DP_SINK_OUTPUT_INTERNAL_DAC dac_continuous_disable(tx_chan); dac_continuous_del_channels(tx_chan); dac_continuous_config_t cont_cfg = { .chan_mask = DAC_CHANNEL_MASK_ALL, .desc_num = 8, .buf_size = 2048, .freq_hz = sample_rate, .offset = 127, .clk_src = DAC_DIGI_CLK_SRC_DEFAULT, // Using APLL as clock source to get a wider frequency range .chan_mode = (ch_count == 1) ? DAC_CHANNEL_MODE_SIMUL : DAC_CHANNEL_MODE_ALTER, }{...}; /* Allocate continuous channels */ dac_continuous_new_channels(&cont_cfg, &tx_chan); /* Enable the continuous channels */ dac_continuous_enable(tx_chan);/* ... */ #else i2s_channel_disable(tx_chan); i2s_std_clk_config_t clk_cfg = I2S_STD_CLK_DEFAULT_CONFIG(sample_rate); i2s_std_slot_config_t slot_cfg = I2S_STD_MSB_SLOT_DEFAULT_CONFIG(I2S_DATA_BIT_WIDTH_16BIT, ch_count); i2s_channel_reconfig_std_clock(tx_chan, &clk_cfg); i2s_channel_reconfig_std_slot(tx_chan, &slot_cfg); i2s_channel_enable(tx_chan);/* ... */ #endif ESP_LOGI(BT_AV_TAG, "Configure audio player: %x-%x-%x-%x", 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, sample rate: %d", sample_rate); }{...} break; }{...} /* when a2dp init or deinit completed, this event comes */... case ESP_A2D_PROF_STATE_EVT: { a2d = (esp_a2d_cb_param_t *)(p_param); if (ESP_A2D_INIT_SUCCESS == a2d->a2d_prof_stat.init_state) { ESP_LOGI(BT_AV_TAG, "A2DP PROF STATE: Init Complete"); }{...} else { ESP_LOGI(BT_AV_TAG, "A2DP PROF STATE: Deinit Complete"); }{...} break; }{...} /* When protocol service capabilities configured, this event comes */... case ESP_A2D_SNK_PSC_CFG_EVT: { a2d = (esp_a2d_cb_param_t *)(p_param); ESP_LOGI(BT_AV_TAG, "protocol service capabilities configured: 0x%x ", a2d->a2d_psc_cfg_stat.psc_mask); if (a2d->a2d_psc_cfg_stat.psc_mask & ESP_A2D_PSC_DELAY_RPT) { ESP_LOGI(BT_AV_TAG, "Peer device support delay reporting"); }{...} else { ESP_LOGI(BT_AV_TAG, "Peer device unsupport delay reporting"); }{...} break; }{...} /* when set delay value completed, this event comes */... case ESP_A2D_SNK_SET_DELAY_VALUE_EVT: { a2d = (esp_a2d_cb_param_t *)(p_param); if (ESP_A2D_SET_INVALID_PARAMS == a2d->a2d_set_delay_value_stat.set_state) { ESP_LOGI(BT_AV_TAG, "Set delay report value: fail"); }{...} else { ESP_LOGI(BT_AV_TAG, "Set delay report value: success, delay_value: %u * 1/10 ms", a2d->a2d_set_delay_value_stat.delay_value); }{...} break; }{...} /* when get delay value completed, this event comes */... case ESP_A2D_SNK_GET_DELAY_VALUE_EVT: { a2d = (esp_a2d_cb_param_t *)(p_param); ESP_LOGI(BT_AV_TAG, "Get delay report value: delay_value: %u * 1/10 ms", a2d->a2d_get_delay_value_stat.delay_value); /* Default delay value plus delay caused by application layer */ esp_a2d_sink_set_delay_value(a2d->a2d_get_delay_value_stat.delay_value + APP_DELAY_VALUE); break; }{...} /* others */... default: ESP_LOGE(BT_AV_TAG, "%s unhandled event: %d", __func__, event); break;... }{...} }{ ... } static void bt_av_hdl_avrc_ct_evt(uint16_t event, void *p_param) { ESP_LOGD(BT_RC_CT_TAG, "%s event: %d", __func__, event); esp_avrc_ct_cb_param_t *rc = (esp_avrc_ct_cb_param_t *)(p_param); switch (event) { /* when connection state changed, this event comes */ case ESP_AVRC_CT_CONNECTION_STATE_EVT: { uint8_t *bda = rc->conn_stat.remote_bda; ESP_LOGI(BT_RC_CT_TAG, "AVRC conn_state event: 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) { /* get remote supported event_ids of peer AVRCP Target */ esp_avrc_ct_send_get_rn_capabilities_cmd(APP_RC_CT_TL_GET_CAPS); }{...} else { /* clear peer notification capability record */ s_avrc_peer_rn_cap.bits = 0; }{...} break; }{...} /* when passthrough responsed, this event comes */... case ESP_AVRC_CT_PASSTHROUGH_RSP_EVT: { ESP_LOGI(BT_RC_CT_TAG, "AVRC passthrough rsp: key_code 0x%x, key_state %d, rsp_code %d", rc->psth_rsp.key_code, rc->psth_rsp.key_state, rc->psth_rsp.rsp_code); break; }{...} /* when metadata responsed, this event comes */... case ESP_AVRC_CT_METADATA_RSP_EVT: { ESP_LOGI(BT_RC_CT_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; }{...} /* when notified, this event comes */... case ESP_AVRC_CT_CHANGE_NOTIFY_EVT: { ESP_LOGI(BT_RC_CT_TAG, "AVRC event notification: %d", rc->change_ntf.event_id); bt_av_notify_evt_handler(rc->change_ntf.event_id, &rc->change_ntf.event_parameter); break; }{...} /* when feature of remote device indicated, this event comes */... case ESP_AVRC_CT_REMOTE_FEATURES_EVT: { ESP_LOGI(BT_RC_CT_TAG, "AVRC remote features %"PRIx32", TG features %x", rc->rmt_feats.feat_mask, rc->rmt_feats.tg_feat_flag); break; }{...} /* when notification capability of peer device got, this event comes */... case ESP_AVRC_CT_GET_RN_CAPABILITIES_RSP_EVT: { ESP_LOGI(BT_RC_CT_TAG, "remote rn_cap: count %d, bitmask 0x%x", rc->get_rn_caps_rsp.cap_count, rc->get_rn_caps_rsp.evt_set.bits); s_avrc_peer_rn_cap.bits = rc->get_rn_caps_rsp.evt_set.bits; bt_av_new_track(); bt_av_playback_changed(); bt_av_play_pos_changed(); break; }{...} /* others */... default: ESP_LOGE(BT_RC_CT_TAG, "%s unhandled event: %d", __func__, event); break;... }{...} }{ ... } static void bt_av_hdl_avrc_tg_evt(uint16_t event, void *p_param) { ESP_LOGD(BT_RC_TG_TAG, "%s event: %d", __func__, event); esp_avrc_tg_cb_param_t *rc = (esp_avrc_tg_cb_param_t *)(p_param); switch (event) { /* when connection state changed, this event comes */ case ESP_AVRC_TG_CONNECTION_STATE_EVT: { uint8_t *bda = rc->conn_stat.remote_bda; ESP_LOGI(BT_RC_TG_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) { /* create task to simulate volume change */ xTaskCreate(volume_change_simulation, "vcsTask", 2048, NULL, 5, &s_vcs_task_hdl); }{...} else { vTaskDelete(s_vcs_task_hdl); ESP_LOGI(BT_RC_TG_TAG, "Stop volume change simulation"); }{...} break; }{...} /* when passthrough commanded, this event comes */... case ESP_AVRC_TG_PASSTHROUGH_CMD_EVT: { ESP_LOGI(BT_RC_TG_TAG, "AVRC passthrough cmd: key_code 0x%x, key_state %d", rc->psth_cmd.key_code, rc->psth_cmd.key_state); break; }{...} /* when absolute volume command from remote device set, this event comes */... case ESP_AVRC_TG_SET_ABSOLUTE_VOLUME_CMD_EVT: { ESP_LOGI(BT_RC_TG_TAG, "AVRC set absolute volume: %d%%", (int)rc->set_abs_vol.volume * 100 / 0x7f); volume_set_by_controller(rc->set_abs_vol.volume); break; }{...} /* when notification registered, this event comes */... case ESP_AVRC_TG_REGISTER_NOTIFICATION_EVT: { ESP_LOGI(BT_RC_TG_TAG, "AVRC register event notification: %d, param: 0x%"PRIx32, rc->reg_ntf.event_id, rc->reg_ntf.event_parameter); if (rc->reg_ntf.event_id == ESP_AVRC_RN_VOLUME_CHANGE) { s_volume_notify = true; esp_avrc_rn_param_t rn_param; rn_param.volume = s_volume; esp_avrc_tg_send_rn_rsp(ESP_AVRC_RN_VOLUME_CHANGE, ESP_AVRC_RN_RSP_INTERIM, &rn_param); }{...} break; }{...} /* when feature of remote device indicated, this event comes */... case ESP_AVRC_TG_REMOTE_FEATURES_EVT: { ESP_LOGI(BT_RC_TG_TAG, "AVRC remote features: %"PRIx32", CT features: %x", rc->rmt_feats.feat_mask, rc->rmt_feats.ct_feat_flag); break; }{...} /* others */... default: ESP_LOGE(BT_RC_TG_TAG, "%s unhandled event: %d", __func__, event); break;... }{...} }{ ... } /******************************** * EXTERNAL FUNCTION DEFINITIONS *******************************//* ... */ 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: case ESP_A2D_PROF_STATE_EVT: case ESP_A2D_SNK_PSC_CFG_EVT: case ESP_A2D_SNK_SET_DELAY_VALUE_EVT: case ESP_A2D_SNK_GET_DELAY_VALUE_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, "Invalid A2DP event: %d", event); break;... }{...} }{ ... } void bt_app_a2d_data_cb(const uint8_t *data, uint32_t len) { write_ringbuf(data, len); /* log the number every 100 packets */ if (++s_pkt_cnt % 100 == 0) { ESP_LOGI(BT_AV_TAG, "Audio packet count: %"PRIu32, s_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_METADATA_RSP_EVT: bt_app_alloc_meta_buffer(param); /* fall through */... 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: case ESP_AVRC_CT_GET_RN_CAPABILITIES_RSP_EVT: { bt_app_work_dispatch(bt_av_hdl_avrc_ct_evt, event, param, sizeof(esp_avrc_ct_cb_param_t), NULL); break; }{...} ... default: ESP_LOGE(BT_RC_CT_TAG, "Invalid AVRC event: %d", event); break;... }{...} }{ ... } void bt_app_rc_tg_cb(esp_avrc_tg_cb_event_t event, esp_avrc_tg_cb_param_t *param) { switch (event) { case ESP_AVRC_TG_CONNECTION_STATE_EVT: case ESP_AVRC_TG_REMOTE_FEATURES_EVT: case ESP_AVRC_TG_PASSTHROUGH_CMD_EVT: case ESP_AVRC_TG_SET_ABSOLUTE_VOLUME_CMD_EVT: case ESP_AVRC_TG_REGISTER_NOTIFICATION_EVT: case ESP_AVRC_TG_SET_PLAYER_APP_VALUE_EVT: bt_app_work_dispatch(bt_av_hdl_avrc_tg_evt, event, param, sizeof(esp_avrc_tg_cb_param_t), NULL); break;... default: ESP_LOGE(BT_RC_TG_TAG, "Invalid AVRC event: %d", event); break;... }{...} }{ ... }