1 files changed, 38 insertions, 0 deletions
diff --git a/nebu/audio/SourceCopy.cpp b/nebu/audio/SourceCopy.cpp
new file mode 100644
index 0000000..15c7ca1
--- /dev/null
+++ b/nebu/audio/SourceCopy.cpp
@@ -0,0 +1,38 @@
+#include "audio/nebu_SourceCopy.h"
+
+#include <assert.h>
+
+namespace Sound {
+  int SourceCopy::Mix(Uint8 *data, int len) {
+    if(_source->_buffer == NULL) return 0;
+
+    int volume = (int)(_source->GetVolume() * SDL_MIX_MAXVOLUME);
+    // fprintf(stderr, "playing copy sample at %d, position: %d\n", volume, _position);
+    int buffersize = _source->_buffersize;
+    Uint8* buffer = (Uint8*) _source->_buffer;
+    
+    assert(len < buffersize);
+      
+    if(len < buffersize - _position) {
+      SDL_MixAudio(data, buffer + _position, len, volume);
+      _position += len;
+    } else { 
+      SDL_MixAudio(data, buffer + _position, buffersize - _position,
+		   volume);
+      len -= buffersize - _position;
+
+      printf("end of sample reached!\n");
+      if(_loop) {
+	if(_loop != 255) 
+	  _loop--;
+
+	_position = 0;
+	SDL_MixAudio(data, buffer + _position, len, volume);
+	_position += len;
+      } else {
+	_isPlaying = 0;
+      }
+    }
+    return 1;
+  }
+}