better impl. for syncr. lyrics for ID3 and FLAC

Author: schreibfaul1

examples/Synchronised lyrics/synchronised_lyrics.ino

@@ -4,13 +4,6 @@
 #include "Ticker.h"
 
 Audio audio;
-Ticker   ticker;
-char     *lyricsText;
-size_t   lyricsTextSize = 0;
-uint16_t lyricsPtr = 0;
-uint32_t timeStamp = 0;
-uint32_t ms = 0;
-char     chbuf[512];
 
 #define I2S_LRC     26
 #define I2S_DOUT    25
@@ -22,32 +15,6 @@ char     chbuf[512];
 #define SD_MMC_CMD  15
 
 
-size_t bigEndian(char* base, uint8_t numBytes, uint8_t shiftLeft = 8){
-    uint64_t result = 0;
-    if(numBytes < 1 || numBytes > 8) return 0;
-    for (int i = 0; i < numBytes; i++) {
-            result += *(base + i) << (numBytes -i - 1) * shiftLeft;
-    }
-    if(result > SIZE_MAX) {log_e("range overflow"); result = 0;} // overflow
-    return (size_t)result;
-}
-
-void tckr(){ // caller every 100ms
-    if(audio.isRunning()){
-        ms += 100;
-        if(ms >= timeStamp){
-            Serial.print(chbuf);
-            strcpy(chbuf, lyricsText + lyricsPtr); lyricsPtr += strlen(chbuf) + 1; // strlen + '\0'
-            timeStamp = bigEndian(lyricsText + lyricsPtr, 4); lyricsPtr += 4;
-        }
-    }
-    else{
-        if(lyricsText) {free(lyricsText); lyricsText = NULL; lyricsTextSize = 0;}
-
-        ticker.detach();
-    }
-}
-
 void setup() {
     pinMode(SD_MMC_D0, INPUT_PULLUP);
     Serial.begin(115200);
@@ -77,20 +44,8 @@ void audio_eof_mp3(const char *info){  //end of file
     Serial.print("eof_mp3     ");Serial.println(info);
 }
 
-void audio_id3lyrics(File &file, const size_t pos, const size_t size) {
-    Serial.printf("\naudio_id3lyrics, pos: %d, size: %d\n", pos, size);
-    lyricsText = (char *)malloc(size);
-    lyricsTextSize = size;
-    file.seek(pos);
-    file.read((uint8_t *)lyricsText, size);
-    Serial.printf("text encoding: %i\n", lyricsText[0]); // 0: ASCII, 3: UTF-8
-    char lang[14]; memcpy(lang, (const char*)lyricsText + 1, 3); lang[3] = '\0'; Serial.printf("language: %s\n", lang);
-    Serial.printf("time stamp format: %i\n", lyricsText[4]);
-    Serial.printf("content type: %i\n", lyricsText[5]);
-    Serial.printf("content descriptor: %i\n\n", lyricsText[6]);
-    lyricsPtr = 7;
-    strcpy(chbuf, lyricsText + lyricsPtr); lyricsPtr += strlen(chbuf) + 1; // strlen + '\0'
-    timeStamp = bigEndian(lyricsText + lyricsPtr, 4);
-    ticker.attach(0.1, tckr); lyricsPtr += 4;
+void audio_id3lyrics(const char* text) {
+    Serial.printf("%s\n", text);
+
 }