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-rw-r--r--include/tinyalsa/asoundlib.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/tinyalsa/asoundlib.h b/include/tinyalsa/asoundlib.h
index a6d5436..cac2786 100644
--- a/include/tinyalsa/asoundlib.h
+++ b/include/tinyalsa/asoundlib.h
@@ -133,13 +133,13 @@ int pcm_get_htimestamp(struct pcm *pcm, unsigned int *avail,
* Will start playback on the first write or on a write that
* occurs after a fifo underrun.
*/
-int pcm_write(struct pcm *pcm, void *data, unsigned int count);
+int pcm_write(struct pcm *pcm, const void *data, unsigned int count);
int pcm_read(struct pcm *pcm, void *data, unsigned int count);
/*
* mmap() support.
*/
-int pcm_mmap_write(struct pcm *pcm, void *data, unsigned int count);
+int pcm_mmap_write(struct pcm *pcm, const void *data, unsigned int count);
int pcm_mmap_begin(struct pcm *pcm, void **areas, unsigned int *offset,
unsigned int *frames);
int pcm_mmap_commit(struct pcm *pcm, unsigned int offset, unsigned int frames);