use size_t and constant pointer in ao plugins

The audio output plugins should get a constant pointer, because they
must not modify the buffer.  Since the size is a non-negative buffer
size in bytes, we should change its type to size_t.

git-svn-id: https://svn.musicpd.org/mpd/trunk@7293 09075e82-0dd4-0310-85a5-a0d7c8717e4f

1 files changed, 4 insertions, 3 deletions

diff --git a/src/audioOutputs/audioOutput_fifo.c b/src/audioOutputs/audioOutput_fifo.c
index d7b83fd7d..0c279667d 100644
--- a/src/audioOutputs/audioOutput_fifo.c
+++ b/src/audioOutputs/audioOutput_fifo.c
@@ -234,11 +234,12 @@ static void fifo_dropBufferedAudio(AudioOutput *audioOutput)
 	}
 }
 
-static int fifo_playAudio(AudioOutput *audioOutput, char *playChunk, int size)
+static int fifo_playAudio(AudioOutput *audioOutput,
+			  const char *playChunk, size_t size)
 {
 	FifoData *fd = (FifoData *)audioOutput->data;
-	int offset = 0;
-	int bytes;
+	size_t offset = 0;
+	ssize_t bytes;
 
 	if (!fd->timer->started)
 		timer_start(fd->timer);