Delete examples/plays all files in a directory/plays_all_files_in_a_directory

examples/plays all files in a directory/plays_all_files_in_a_directory

-#include "Arduino.h"
-#include "Audio.h"
-#include "SD_MMC.h"
-#include "FS.h"
-#include <vector>
-
-#define I2S_LRC     26
-#define I2S_DOUT    25
-#define I2S_BCLK    27
-
-#define SD_MMC_D0   2
-#define SD_MMC_CLK  14
-#define SD_MMC_CMD  15
-
-void listDir(fs::FS &fs, const char * dirname, uint8_t levels); //proto
-std::vector<char*>  v_audioContent;
-int pirPin = 4;
-Audio audio;
-
-File dir;
-const char audioDir[] = "/mp3";
-
-void setup() {
-    Serial.begin(115200);
-    pinMode(SD_MMC_D0, INPUT_PULLUP);
-    SD_MMC.setPins(SD_MMC_CLK,SD_MMC_CMD, SD_MMC_D0);
-    if(!SD_MMC.begin( "/sdmmc", true, false, 20000)){
-        Serial.println("Card Mount Failed");
-        return;
-    }
-    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT, -1, 0);
-    audio.setVolume(17); // 0...21 Will need to add a volume setting in the app
-    dir = SD_MMC.open(audioDir);
-    listDir(SD_MMC, audioDir, 1);
-    if(v_audioContent.size() > 0){
-        const char* s = (const char*)v_audioContent[v_audioContent.size() -1];
-        Serial.printf("playing %s\n", s);
-        audio.connecttoFS(SD_MMC, s);
-        v_audioContent.pop_back();
-    }
-}
-
-void loop(){
-    audio.loop();
-}
-
-void listDir(fs::FS &fs, const char * dirname, uint8_t levels){
-    Serial.printf("Listing directory: %s\n", dirname);
-
-    File root = fs.open(dirname);
-    if(!root){
-        Serial.println("Failed to open directory");
-        return;
-    }
-    if(!root.isDirectory()){
-        Serial.println("Not a directory");
-        return;
-    }
-
-    File file = root.openNextFile();
-    while(file){
-        if(file.isDirectory()){
-            Serial.print("  DIR : ");
-            Serial.println(file.name());
-            if(levels){
-                listDir(fs, file.path(), levels -1);
-            }
-        } else {
-            Serial.print("  FILE: ");
-            Serial.print(file.name());
-            Serial.print("  SIZE: ");
-            Serial.println(file.size());
-            v_audioContent.insert(v_audioContent.begin(), strdup(file.path()));
-        }
-        file = root.openNextFile();
-    }
-    Serial.printf("num files %i", v_audioContent.size());
-    root.close();
-    file.close();
-}
-
-void vector_clear_and_shrink(vector<char*>&vec){
-    uint size = vec.size();
-    for (int i = 0; i < size; i++) {
-        if(vec[i]){
-            free(vec[i]);
-            vec[i] = NULL;
-        }
-    }
-    vec.clear();
-    vec.shrink_to_fit();
-}
-
-
-// optional
-void audio_info(const char *info){
-    Serial.print("info        "); Serial.println(info);
-}
-void audio_id3data(const char *info){  //id3 metadata
-    Serial.print("id3data     ");Serial.println(info);
-}
-void audio_eof_mp3(const char *info){  //end of file
-    Serial.print("eof_mp3     ");Serial.println(info);
-    if(v_audioContent.size() == 0){
-        vector_clear_and_shrink(v_audioContent); // free memory
-        return;
-    }
-    const char* s = (const char*)v_audioContent[v_audioContent.size() - 1];
-    Serial.printf("playing %s\n", s);
-    audio.connecttoFS(SD_MMC, s);
-    v_audioContent.pop_back();
-}