97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
#include "Arduino.h"
|
|
#include "Audio.h"
|
|
#include "SD_MMC.h"
|
|
#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
|
|
#define I2S_BCLK 27
|
|
#define I2S_MCLK 0
|
|
|
|
#define SD_MMC_D0 2
|
|
#define SD_MMC_CLK 14
|
|
#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);
|
|
if(!SD_MMC.begin( "/sdcard", true, false, 20000)){
|
|
Serial.println("Card Mount Failed");
|
|
return;
|
|
}
|
|
audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
|
|
audio.setVolume(10); // 0...21
|
|
audio.connecttoFS(SD_MMC, "/Little London Girl(lyrics).mp3");
|
|
}
|
|
|
|
void loop(){
|
|
vTaskDelay(1);
|
|
audio.loop();
|
|
}
|
|
|
|
// optional
|
|
void audio_info(const char *info){
|
|
Serial.print("info "); Serial.println(info);
|
|
}
|
|
void audio_id3data(const char *info){ //id3 metadata
|
|
// if(strncmp(info, "Year: ", 6) == 0) Serial.println(info + 6);
|
|
Serial.print("id3data ");Serial.println(info);
|
|
}
|
|
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;
|
|
}
|
|
|