[AUDIO] Music Looping enhancements (#1665)

* Add loop functions for music files.
Tell xm tracker to loop tracker when loop state changes.
Don't let looped xm tracker streams restart, they are infinite
Use modulo to make time tracker for xm looped streams work correctly.

* Remove loop functions, set XM loop in update based on flag.
Formatting cleanups.

Co-authored-by: Jeffery Myers <[email protected]>

src/raudio.c

@@ -1575,7 +1575,11 @@ void StopMusicStream(Music music)
 // Update (re-fill) music buffers if data already processed
 void UpdateMusicStream(Music music)
 {
-    if (music.stream.buffer == NULL) return;
+    if (music.stream.buffer == NULL)
+        return;
+
+    if (music.ctxType == MUSIC_MODULE_XM)
+        jar_xm_set_max_loop_count(music.ctxData, music.looping ? 0 : 1);
 
     bool streamEnding = false;
 
@@ -1590,6 +1594,8 @@ void UpdateMusicStream(Music music)
     //ma_uint32 frameSizeInBytes = ma_get_bytes_per_sample(music.stream.buffer->dsp.formatConverterIn.config.formatIn)*music.stream.buffer->dsp.formatConverterIn.config.channels;
     int sampleLeft = music.sampleCount - (music.stream.buffer->totalFramesProcessed*music.stream.channels);
 
+    if (music.ctxType == MUSIC_MODULE_XM && music.looping) sampleLeft = subBufferSizeInFrames*4;
+
     while (IsAudioStreamProcessed(music.stream))
     {
         if ((sampleLeft/music.stream.channels) >= subBufferSizeInFrames) samplesCount = subBufferSizeInFrames*music.stream.channels;
@@ -1649,10 +1655,10 @@ void UpdateMusicStream(Music music)
 
         UpdateAudioStream(music.stream, pcm, samplesCount);
 
-        if ((music.ctxType == MUSIC_MODULE_XM) || (music.ctxType == MUSIC_MODULE_MOD))
+        if ((music.ctxType == MUSIC_MODULE_XM) || music.ctxType == MUSIC_MODULE_MOD)
         {
-            if (samplesCount > 1) sampleLeft -= samplesCount/2;
-            else sampleLeft -= samplesCount;
+			if (samplesCount > 1) sampleLeft -= samplesCount / 2;
+			else sampleLeft -= samplesCount;
         }
         else sampleLeft -= samplesCount;
 
@@ -1711,8 +1717,17 @@ float GetMusicTimeLength(Music music)
 // Get current music time played (in seconds)
 float GetMusicTimePlayed(Music music)
 {
+#if defined(SUPPORT_FILEFORMAT_XM)
+	if (music.ctxType == MUSIC_MODULE_XM)
+	{
+        uint64_t samples = 0;
+        jar_xm_get_position(music.ctxData, NULL, NULL, NULL, &samples);
+        samples = samples % (music.sampleCount);
+
+        return (float)(samples) / (music.stream.sampleRate * music.stream.channels);
+	}
+#endif
     float secondsPlayed = 0.0f;
-
     if (music.stream.buffer != NULL)
     {
         //ma_uint32 frameSizeInBytes = ma_get_bytes_per_sample(music.stream.buffer->dsp.formatConverterIn.config.formatIn)*music.stream.buffer->dsp.formatConverterIn.config.channels;

src/raylib.h

@@ -1489,9 +1489,9 @@ RLAPI void UpdateMusicStream(Music music);                            // Updates
 RLAPI void StopMusicStream(Music music);                              // Stop music playing
 RLAPI void PauseMusicStream(Music music);                             // Pause music playing
 RLAPI void ResumeMusicStream(Music music);                            // Resume playing paused music
-RLAPI bool IsMusicPlaying(Music music);                               // Check if music is playing
 RLAPI void SetMusicVolume(Music music, float volume);                 // Set volume for music (1.0 is max level)
 RLAPI void SetMusicPitch(Music music, float pitch);                   // Set pitch for a music (1.0 is base level)
+RLAPI void SetMusicLooping(Music *music, bool loop);                   // Set the music to loop or not
 RLAPI float GetMusicTimeLength(Music music);                          // Get music time length (in seconds)
 RLAPI float GetMusicTimePlayed(Music music);                          // Get current music time played (in seconds)