output: use bool for return values and flags

Don't return 0/-1 on success/error, but true/false.  Instead of int,
use bool for storing flags.

1 files changed, 5 insertions, 4 deletions

diff --git a/src/output_control.c b/src/output_control.c
index 15b4eb19c..9193e92eb 100644
--- a/src/output_control.c
+++ b/src/output_control.c
@@ -51,14 +51,15 @@ static void ao_command_async(struct audio_output *ao,
 	notify_signal(&ao->notify);
 }
 
-int audio_output_open(struct audio_output *audioOutput,
-		      const struct audio_format *audioFormat)
+bool
+audio_output_open(struct audio_output *audioOutput,
+		  const struct audio_format *audioFormat)
 {
-	int ret = 0;
+	bool ret = true;
 
 	if (audioOutput->open &&
 	    audio_format_equals(audioFormat, &audioOutput->inAudioFormat)) {
-		return 0;
+		return true;
 	}
 
 	audioOutput->inAudioFormat = *audioFormat;