output_api: play() returns a length

The old API required an output plugin to not return until all data
passed to the play() method is consumed.  Some output plugins have to
loop to fulfill that requirement, and may block during that.  Simplify
these, by letting them consume only part of the buffer: make play()
return the length of the consumed data.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/output/null_plugin.c b/src/output/null_plugin.c
index 1ae55ca9b..2506feb74 100644
--- a/src/output/null_plugin.c
+++ b/src/output/null_plugin.c
@@ -74,14 +74,14 @@ null_close(void *data)
 	}
 }
 
-static bool
+static size_t
 null_play(void *data, G_GNUC_UNUSED const char *chunk, size_t size)
 {
 	struct null_data *nd = data;
 	Timer *timer = nd->timer;
 
 	if (!nd->sync)
-		return true;
+		return size;
 
 	if (!timer->started)
 		timer_start(timer);
@@ -90,7 +90,7 @@ null_play(void *data, G_GNUC_UNUSED const char *chunk, size_t size)
 
 	timer_add(timer, size);
 
-	return true;
+	return size;
 }
 
 static void