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-rw-r--r--src/pcm_mix.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/pcm_mix.h b/src/pcm_mix.h
index 6605585bd..086d5501e 100644
--- a/src/pcm_mix.h
+++ b/src/pcm_mix.h
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * Copyright (C) 2003-2010 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
@@ -35,7 +35,8 @@ struct audio_format;
* @param size the size of both buffers in bytes
* @param format the audio format of both buffers
* @param portion1 a number between 0.0 and 1.0 specifying the portion
- * of the first buffer in the mix; portion2 = (1.0 - portion1)
+ * of the first buffer in the mix; portion2 = (1.0 - portion1). The value
+ * NaN is used by the MixRamp code to specify that simple addition is required.
*/
void
pcm_mix(void *buffer1, const void *buffer2, size_t size,