Refactored #75

Adafruit_VS1053.cpp

@@ -40,6 +40,7 @@ SIGNAL(TIMER0_COMPA_vect) { myself->feedBuffer(); }
 #endif
 
 volatile boolean feedBufferLock = false; //!< Locks feeding the buffer
+boolean _loopPlayback; //!< internal variable, used to control playback looping
 
 #if defined(ESP8266)
 ICACHE_RAM_ATTR
@@ -102,6 +103,7 @@ Adafruit_VS1053_FilePlayer::Adafruit_VS1053_FilePlayer(int8_t rst, int8_t cs,
 
   playingMusic = false;
   _cardCS = cardcs;
+  _loopPlayback = false;
 }
 
 Adafruit_VS1053_FilePlayer::Adafruit_VS1053_FilePlayer(int8_t cs, int8_t dcs,
@@ -111,6 +113,7 @@ Adafruit_VS1053_FilePlayer::Adafruit_VS1053_FilePlayer(int8_t cs, int8_t dcs,
 
   playingMusic = false;
   _cardCS = cardcs;
+  _loopPlayback = false;
 }
 
 Adafruit_VS1053_FilePlayer::Adafruit_VS1053_FilePlayer(int8_t mosi, int8_t miso,
@@ -122,6 +125,7 @@ Adafruit_VS1053_FilePlayer::Adafruit_VS1053_FilePlayer(int8_t mosi, int8_t miso,
 
   playingMusic = false;
   _cardCS = cardcs;
+  _loopPlayback = false;
 }
 
 boolean Adafruit_VS1053_FilePlayer::begin(void) {
@@ -174,6 +178,12 @@ boolean Adafruit_VS1053_FilePlayer::stopped(void) {
   return (!playingMusic && !currentTrack);
 }
 
+void Adafruit_VS1053_FilePlayer::playbackLoop(boolean loopState) {
+  _loopPlayback = loopState;
+}
+
+boolean Adafruit_VS1053_FilePlayer::playbackLooped() { return _loopPlayback; }
+
 // Just checks to see if the name ends in ".mp3"
 boolean Adafruit_VS1053_FilePlayer::isMP3File(const char *fileName) {
   return (strlen(fileName) > 4) &&
@@ -297,10 +307,20 @@ void Adafruit_VS1053_FilePlayer::feedBuffer_noLock(void) {
     int bytesread = currentTrack.read(mp3buffer, VS1053_DATABUFFERLEN);
 
     if (bytesread == 0) {
-      // must be at the end of the file, wrap it up!
-      playingMusic = false;
-      currentTrack.close();
-      break;
+      // must be at the end of the file
+      if (_loopPlayback) {
+        // play in loop
+        if (isMP3File(currentTrack.name())) {
+          currentTrack.seek(mp3_ID3Jumper(currentTrack));
+        } else {
+          currentTrack.seek(0);
+        }
+      } else {
+        // wrap it up!
+        playingMusic = false;
+        currentTrack.close();
+        break;
+      }
     }
 
     playData(mp3buffer, bytesread);

Adafruit_VS1053.h

@@ -391,6 +391,18 @@ class Adafruit_VS1053_FilePlayer : public Adafruit_VS1053 {
    * @param pause whether or not to pause playback
    */
   void pausePlaying(boolean pause);
+  /*!
+   * @brief Set state for playback looping
+   * @param loopState Sets playback loop state (Note: Only use with
+   * startPlayingFile, if used with playFullFile no subsequent code in the
+   * sketch executes)
+   */
+  void playbackLoop(boolean loopState);
+  /*!
+   * @brief Retrieve playback loop state
+   * @return Returns true when looped playback is enabled
+   */
+  boolean playbackLooped();
   /*!
    * @brief Determine current playback speed
    * @return Returns playback speed, i.e. 1 for 1x, 2 for 2x, 3 for 3x