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-rw-r--r--include/tinyalsa/asoundlib.h4
-rw-r--r--pcm.c8
2 files changed, 6 insertions, 6 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);
diff --git a/pcm.c b/pcm.c
index fe2a8d6..9e198ad 100644
--- a/pcm.c
+++ b/pcm.c
@@ -295,7 +295,7 @@ static int pcm_areas_copy(struct pcm *pcm, unsigned int pcm_offset,
return 0;
}
-static int pcm_mmap_write_areas(struct pcm *pcm, char *src,
+static int pcm_mmap_write_areas(struct pcm *pcm, const char *src,
unsigned int offset, unsigned int size)
{
void *pcm_areas;
@@ -355,14 +355,14 @@ int pcm_get_htimestamp(struct pcm *pcm, unsigned int *avail,
return 0;
}
-int pcm_write(struct pcm *pcm, void *data, unsigned int count)
+int pcm_write(struct pcm *pcm, const void *data, unsigned int count)
{
struct snd_xferi x;
if (pcm->flags & PCM_IN)
return -EINVAL;
- x.buf = data;
+ x.buf = (void*)data;
x.frames = count / (pcm->config.channels *
pcm_format_to_bits(pcm->config.format) / 8);
@@ -748,7 +748,7 @@ int pcm_wait(struct pcm *pcm, int timeout)
return 1;
}
-int pcm_mmap_write(struct pcm *pcm, void *buffer, unsigned int bytes)
+int pcm_mmap_write(struct pcm *pcm, const void *buffer, unsigned int bytes)
{
int err = 0, frames, avail;
unsigned int offset = 0, count;