这是一次长久的提交：

1. 应用界面增加了返回主页的按钮
2. 修复了gif渲染内存泄漏的严重bug
3. 将PetDao当中的cJSON API替换为cpp_json，完美通过测试
4. 整合已经实现的各种上层建筑，实现了一个宠物对话基本业务应用，用于样品测试展示用
5. 重构了音频播放类，使其更modern，更加便于移植和拓展

Lib/Audio_Driver/PCM5101.c

@@ -1,8 +1,7 @@
 #include "PCM5101.h"
-
 static const char *TAG = "AUDIO PCM5101"; 
 
-static i2s_chan_handle_t i2s_tx_chan; 
+i2s_chan_handle_t i2s_tx_chan = NULL;
 static i2s_chan_handle_t i2s_rx_chan; 
 
 uint8_t Volume = Volume_MAX - 2;
@@ -24,8 +23,8 @@ static esp_err_t bsp_i2s_write(void *audio_buffer, size_t len, size_t *bytes_wri
 
     return i2s_channel_write(i2s_tx_chan, (char *)audio_buffer, len, bytes_written, timeout_ms);
 }
-static esp_err_t bsp_i2s_reconfig_clk(uint32_t rate, uint32_t bits_cfg, i2s_slot_mode_t ch) {                                   // I2S Init
-    esp_err_t ret = ESP_OK; 
+esp_err_t bsp_i2s_reconfig_clk(uint32_t rate, uint32_t bits_cfg, i2s_slot_mode_t ch) {                        // I2S Init
+    esp_err_t ret = ESP_OK;
     i2s_std_config_t std_cfg = {
         .clk_cfg = I2S_STD_CLK_DEFAULT_CONFIG(rate),
         .slot_cfg = I2S_STD_PHILIP_SLOT_DEFAULT_CONFIG((i2s_data_bit_width_t)bits_cfg, ch),
@@ -34,11 +33,11 @@ static esp_err_t bsp_i2s_reconfig_clk(uint32_t rate, uint32_t bits_cfg, i2s_slot
     ret |= i2s_channel_disable(i2s_tx_chan);
     ret |= i2s_channel_reconfig_std_clock(i2s_tx_chan, &std_cfg.clk_cfg);
     ret |= i2s_channel_reconfig_std_slot(i2s_tx_chan, &std_cfg.slot_cfg);
-    ret |= i2s_channel_enable(i2s_tx_chan); 
+    ret |= i2s_channel_enable(i2s_tx_chan);
     return ret; 
 }
 
-static esp_err_t audio_mute_function(AUDIO_PLAYER_MUTE_SETTING setting) {                                                       // audio mute function
+static esp_err_t audio_mute_function(AUDIO_PLAYER_MUTE_SETTING setting) {                         // audio mute function
     ESP_LOGI(TAG, "mute setting %d", setting); 
     return ESP_OK; 
 }
@@ -214,3 +213,6 @@ void Volume_adjustment(uint8_t Vol) {
         Volume = Vol;
     ESP_LOGI(TAG, "Volume set to %d", Volume);
 }
+
+
+

Lib/Audio_Driver/PCM5101.h

@@ -57,6 +57,15 @@ uint32_t Music_Elapsed(void);
 uint16_t Music_Energy(void);
 void Volume_adjustment(uint8_t Volume);
 
+
+// 供 C++ 层调用的“重新配置时钟”包装
+esp_err_t bsp_i2s_reconfig_clk(uint32_t rate,
+                               uint32_t bits_cfg,
+                               i2s_slot_mode_t ch);
+
+// 供 C++ 层直接用的 tx channel 句柄
+extern i2s_chan_handle_t i2s_tx_chan;
+
 #ifdef __cplusplus
 }
 #endif