component/bt: clean up the A2DP sink example

components/bt/bluedroid/osi/config.c

@@ -22,15 +22,14 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-// #include <sys/stat.h>
 
 #include "allocator.h"
 #include "config.h"
 #include "list.h"
 #include "bt_trace.h"
 
-#define CONFIG_FILE_MAX_SIZE      (512)
-#define CONFIG_KEY                "cfg_key1"
+#define CONFIG_FILE_MAX_SIZE      (1024)
+#define CONFIG_KEY                "bt_cfg_key"
 typedef struct {
     char *key;
     char *value;

examples/bluetooth/a2dp_sink/README.rst

@@ -1,5 +1,14 @@
-ESP-IDF A2DP-SINK
-=======================
+ESP-IDF A2DP-SINK demo
+======================
 
 Demo of A2DP audio sink role
 
+This is the demo for user to use ESP_APIs to create a GATT Server.
+
+Options choose step:
+    1. make menuconfig.
+    2. enter menuconfig "Component config", choose "Bluetooth"
+    3. enter menu Bluetooth, choose "Classic Bluetooth" and do not choose "Release DRAM from Classic BT controller"
+    4. choose your options.
+
+After the program started, other bluetooth devices such as smart phones can discover this device named "ESP_SPEAKER", and after connection is established, audio data can be transmitted and there will occur a count of audio data packets printed.

examples/bluetooth/a2dp_sink/components/bt_app/app_project/SampleAV.c

@@ -2,13 +2,10 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
-
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "freertos/timers.h"
-
 #include "esp_system.h"
-
 #include "bt_app_common.h"
 #include "esp_bt_main.h"
 #include "esp_bt_device.h"
@@ -16,47 +13,49 @@
 #include "esp_a2dp_api.h"
 #include "esp_avrc_api.h"
 
-static uint32_t m_pkt_cnt = 0;
+
 
 typedef enum {
     BT_APP_EVT_STACK_ON = 0xa0,
     BT_APP_EVT_MAX
 } bt_app_evt_t;
 
-
 typedef union {
     esp_a2d_cb_param_t a2d;
     esp_avrc_ct_cb_event_t rc;
 } bt_app_evt_arg;
 
+
+static uint32_t m_pkt_cnt = 0;
 static esp_a2d_audio_state_t m_audio_state = ESP_A2D_AUDIO_STATE_STOPPED;
 
 static void bt_app_handle_evt(uint16_t event, void *p_param);
-
 static void bt_app_handle_rc_evt(uint16_t event, void *p_param);
+static void bt_app_a2d_cb(esp_a2d_cb_event_t event, esp_a2d_cb_param_t *param);
+static void bt_app_a2d_data_cb(const uint8_t *data, uint32_t len);
+static void bt_app_rc_ct_cb(esp_avrc_ct_cb_event_t event, esp_avrc_ct_cb_param_t *param);
+static void bt_app_handle_evt(uint16_t event, void *p_param);
 
 static 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_AUDIO_CFG_EVT: {
         bt_app_transfer_context(bt_app_handle_evt, event, param, sizeof(bt_app_evt_arg), NULL);
         break;
     }
     default:
-        BT_APP_TRACE_ERROR("===a2dp invalid cb event: %d\n", event);
+        BT_APP_TRACE_ERROR("===a2dp invalid cb event: %d===\n", event);
         break;
     }
 }
 
 static void bt_app_a2d_data_cb(const uint8_t *data, uint32_t len)
 {
-    if (++m_pkt_cnt % 50 == 0) {
+    if (++m_pkt_cnt % 100 == 0) {
         BT_APP_TRACE_ERROR("audio data pkt cnt %u\n", m_pkt_cnt);
     }
-    // EspAudioPlayerStreamWrite((uint8_t *)data, len, 10);
 }
 
 static void bt_app_rc_ct_cb(esp_avrc_ct_cb_event_t event, esp_avrc_ct_cb_param_t *param)
@@ -68,14 +67,14 @@ static void bt_app_rc_ct_cb(esp_avrc_ct_cb_event_t event, esp_avrc_ct_cb_param_t
         break;
     }
     default:
-        BT_APP_TRACE_ERROR("===a2dp invalid cb event: %d\n", event);
+        BT_APP_TRACE_ERROR("===a2dp invalid cb event: %d===\n", event);
         break;
     }
 }
 
 static void bt_app_handle_evt(uint16_t event, void *p_param)
 {
-    BT_APP_TRACE_DEBUG("bt_app_handle_evt 0x%x\n", event);
+    BT_APP_TRACE_DEBUG("===bt_app_handle_evt 0x%x===\n", event);
     esp_a2d_cb_param_t *a2d = NULL;
     switch (event) {
     case BT_APP_EVT_STACK_ON: {
@@ -107,18 +106,15 @@ static void bt_app_handle_evt(uint16_t event, void *p_param)
     }
     case ESP_A2D_AUDIO_CFG_EVT: {
         a2d = (esp_a2d_cb_param_t *)(p_param);
-        BT_APP_TRACE_EVENT("===a2dp audio_cfg_cb type %d ===\n", a2d->audio_cfg.mcc.type);
+        BT_APP_TRACE_EVENT("===a2dp audio_cfg_cb type %d===\n", a2d->audio_cfg.mcc.type);
+        // for now only SBC stream is supported
         if (a2d->audio_cfg.mcc.type == ESP_A2D_MCT_SBC) {
-            // temporarily hardcoded the PCM configuaration
             BT_APP_TRACE_EVENT("configure audio player\n");
-            // EspAudioPlayerStreamCfg(StreamSampleRate_44k, 2, StreamBitLen_16BIT);
-            // EspAudio_SetupStream("stream.pcm", InputSrcType_Stream);
-            // EspAudio_SetVolume(99);
         }
         break;
     }
     default:
-        BT_APP_TRACE_ERROR("===application invalid event: %d\n", event);
+        BT_APP_TRACE_ERROR("===application invalid event: %d===\n", event);
         break;
     }
 
@@ -140,7 +136,7 @@ void bt_app_handle_rc_evt(uint16_t event, void *p_param)
         break;
     }
     default:
-        BT_APP_TRACE_ERROR("===application invalid event: %d\n", event);
+        BT_APP_TRACE_ERROR("===application invalid event: %d===\n", event);
         break;
     }
 }

examples/bluetooth/a2dp_sink/main/demo_main.c

@@ -8,7 +8,6 @@
 
 #include "nvs_flash.h"
 #include "esp_system.h"
-// #include "EspAudio.h"
 
 extern void bte_main_boot_entry(void *);
 extern void bt_app_task_start_up(void);
@@ -17,9 +16,6 @@ extern void bt_app_core_start(void);
 void app_main()
 {
     nvs_flash_init();
-    // system_init();
-    // printf("Free memory: %d bytes\n", system_get_free_heap_size());
-    // EspAudio_Init();
     esp_bt_controller_init();
 
     if (esp_bt_controller_enable(ESP_BT_MODE_BTDM) != ESP_OK) {

examples/bluetooth/a2dp_sink/main/include/psramApi.h

@@ -1,23 +0,0 @@
-// Copyright 2010-2016 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 "freertos/FreeRTOS.h"
-#include "freertos/task.h"
-#include "freertos/queue.h"
-#include "string.h"
-#include "stdlib.h"
-
-void psram_cache_enable(void);
-
-void psram_cache_memcpy(uint8_t *dst, uint8_t *src, uint16_t len);

examples/bluetooth/a2dp_sink/sdkconfig.defaults

@@ -0,0 +1,6 @@
+# Override some defaults so BT stack is enabled and
+# Classic BT is enabled and BT_DRAM_RELEASE is disabled
+CONFIG_BT_ENABLED=y
+CONFIG_CLASSIC_BT_ENABLED=y
+# CONFIG_BT_DRAM_RELEASE is not set
+