1 files changed, 5 insertions, 5 deletions
diff --git a/src/pcm_utils.h b/src/pcm_utils.h
index 7362cb7b8..752fac3e7 100644
--- a/src/pcm_utils.h
+++ b/src/pcm_utils.h
@@ -45,13 +45,13 @@ typedef struct _ConvState {
 void pcm_volumeChange(char *buffer, int bufferSize, AudioFormat * format,
                       int volume);
 
-void pcm_mix(char *buffer1, char *buffer2, size_t bufferSize1,
-             size_t bufferSize2, AudioFormat * format, float portion1);
+void pcm_mix(char *buffer1, const char *buffer2, size_t bufferSize1,
+             size_t bufferSize2, const AudioFormat * format, float portion1);
 
-size_t pcm_convertAudioFormat(AudioFormat * inFormat, char *inBuffer,
+size_t pcm_convertAudioFormat(AudioFormat * inFormat, const char *inBuffer,
                               size_t inSize, AudioFormat * outFormat,
                               char *outBuffer, ConvState *convState);
 
-size_t pcm_sizeOfConvBuffer(AudioFormat * inFormat, size_t inSize,
-                            AudioFormat * outFormat);
+size_t pcm_sizeOfConvBuffer(const AudioFormat * inFormat, size_t inSize,
+                            const AudioFormat * outFormat);
 #endif