new trace logs and optimizations

src/audio.c

@@ -584,12 +584,15 @@ void PlayMusicStream(char *fileName)
         // only stereo is supported for xm
         if(!jar_xm_create_context_from_file(&currentMusic.chipctx, currentMusic.sampleRate, fileName))
         {
-            currentMusic.format = AL_FORMAT_STEREO16; // AL_FORMAT_STEREO_FLOAT32;
+            currentMusic.format = AL_FORMAT_STEREO16;
             jar_xm_set_max_loop_count(currentMusic.chipctx, 0); // infinite number of loops
             currentMusic.totalSamplesLeft =  jar_xm_get_remaining_samples(currentMusic.chipctx);
-            currentMusic.totalLengthSeconds = currentMusic.totalSamplesLeft / (currentMusic.sampleRate * currentMusic.channels);
+            currentMusic.totalLengthSeconds = ((float)currentMusic.totalSamplesLeft) / ((float)currentMusic.sampleRate);
             musicEnabled = true;
             
+            TraceLog(INFO, "[%s] XM number of samples: %i", fileName, currentMusic.totalSamplesLeft);
+            TraceLog(INFO, "[%s] XM track length: %11.6f sec", fileName, currentMusic.totalLengthSeconds);
+            
             // Set up OpenAL
             alGenSources(1, &currentMusic.source);
             alSourcef(currentMusic.source, AL_PITCH, 1);
@@ -601,7 +604,10 @@ void PlayMusicStream(char *fileName)
             BufferMusicStream(currentMusic.buffers[1]);
             alSourceQueueBuffers(currentMusic.source, 2, currentMusic.buffers);
             alSourcePlay(currentMusic.source);
+            
+            // NOTE: Regularly, we must check if a buffer has been processed and refill it: UpdateMusicStream()
         }
+        else TraceLog(WARNING, "[%s] XM file could not be opened", fileName);
     }
     else TraceLog(WARNING, "[%s] Music extension not recognized, it can't be loaded", fileName);
 }
@@ -680,7 +686,7 @@ float GetMusicTimeLength(void)
     float totalSeconds;
     if (currentMusic.chipTune)
     {
-        totalSeconds = currentMusic.totalLengthSeconds; // Not sure if this is the correct value
+        totalSeconds = currentMusic.totalLengthSeconds;
     }
     else
     {
@@ -801,7 +807,7 @@ void UpdateMusicStream(void)
             {
                 if(currentMusic.chipTune)
                 {
-                    currentMusic.totalSamplesLeft = jar_xm_get_remaining_samples(currentMusic.chipctx);
+                    currentMusic.totalSamplesLeft = currentMusic.totalLengthSeconds * currentMusic.sampleRate;
                 }
                 else
                 {

src/jar_xm.h

@@ -121,51 +121,47 @@ void jar_xm_free_context(jar_xm_context_t*);
 
 /** Play the module and put the sound samples in an output buffer.
  *
- * @param output buffer of 2*numsamples elements
+ * @param output buffer of 2*numsamples elements (A left and right value for each sample)
  * @param numsamples number of samples to generate
  */
 void jar_xm_generate_samples(jar_xm_context_t*, float* output, size_t numsamples);
 
 /** Play the module, resample from 32 bit to 16 bit, and put the sound samples in an output buffer.
  *
- * @param output buffer of 2*numsamples elements
+ * @param output buffer of 2*numsamples elements (A left and right value for each sample)
  * @param numsamples number of samples to generate
  */
 void jar_xm_generate_samples_16bit(jar_xm_context_t* ctx, short* output, size_t numsamples)
 {
     float* musicBuffer = malloc((2*numsamples)*sizeof(float));
-    short* musicBuffer2 = malloc((2*numsamples)*sizeof(short));
-
     jar_xm_generate_samples(ctx, musicBuffer, numsamples);
 
-    int x;
-    for(x=0;x<2*numsamples;x++)
-        musicBuffer2[x] = musicBuffer[x] * SHRT_MAX;
+    if(output){
+        int x;
+        for(x=0;x<2*numsamples;x++)
+            output[x] = musicBuffer[x] * SHRT_MAX;
+    }
 
-    memcpy(output, musicBuffer2, (2*numsamples)*sizeof(short));
     free(musicBuffer);
-    free(musicBuffer2);
 }
 
 /** Play the module, resample from 32 bit to 8 bit, and put the sound samples in an output buffer.
  *
- * @param output buffer of 2*numsamples elements
+ * @param output buffer of 2*numsamples elements (A left and right value for each sample)
  * @param numsamples number of samples to generate
  */
 void jar_xm_generate_samples_8bit(jar_xm_context_t* ctx, char* output, size_t numsamples)
 {
     float* musicBuffer = malloc((2*numsamples)*sizeof(float));
-    char* musicBuffer2 = malloc((2*numsamples)*sizeof(char));
-
     jar_xm_generate_samples(ctx, musicBuffer, numsamples);
 
-    int x;
-    for(x=0;x<2*numsamples;x++)
-        musicBuffer2[x] = musicBuffer[x] * CHAR_MAX;
+    if(output){
+        int x;
+        for(x=0;x<2*numsamples;x++)
+            output[x] = musicBuffer[x] * CHAR_MAX;
+    }
 
-    memcpy(output, musicBuffer2, (2*numsamples)*sizeof(char));
     free(musicBuffer);
-    free(musicBuffer2);
 }