added ob_set_lazy()

In lazy mode (previously the default), outputBuffer.c only wakes up
the player when it was previously empty.  That caused a deadlock when
the player was waiting for buffered_before_play, since the decoder
wouldn't wake up the player when buffered_before_play was reached.  In
non-lazy mode, always wake up the player when a new chunk was decoded.

git-svn-id: https://svn.musicpd.org/mpd/trunk@7364 09075e82-0dd4-0310-85a5-a0d7c8717e4f

1 files changed, 12 insertions, 0 deletions

diff --git a/src/outputBuffer.h b/src/outputBuffer.h
index 6e9d7c49f..4aea59120 100644
--- a/src/outputBuffer.h
+++ b/src/outputBuffer.h
@@ -53,6 +53,10 @@ typedef struct _OutputBuffer {
 	/** the index after the last decoded chunk */
 	unsigned int volatile end;
 
+	/** non-zero if the player thread should only we woken up if
+	    the buffer becomes non-empty */
+	int lazy;
+
 	AudioFormat audioFormat;
 	ConvState convState;
 } OutputBuffer;
@@ -65,6 +69,14 @@ void ob_clear(void);
 
 void ob_flush(void);
 
+/**
+ * When a chunk is decoded, we wake up the player thread to tell him
+ * about it.  In "lazy" mode, we only wake him up when the buffer was
+ * previously empty, i.e. when the player thread has really been
+ * waiting for us.
+ */
+void ob_set_lazy(int lazy);
+
 /** is the buffer empty? */
 int ob_is_empty(void);