added OutputBuffer.notify

OutputBuffer should be a more generic low-level library, without
dependencies to the other headers.  This patch adds the field
"notify", which is used to signal the player thread.  It is passed in
the constructor, and removes the need to compile with the decode.h
header.

src/outputBuffer.c

@@ -21,7 +21,7 @@
 
 #include "utils.h"
 
-void ob_init(unsigned int size)
+void ob_init(unsigned int size, Notify *notify)
 {
 	assert(size > 0);
 
@@ -31,6 +31,7 @@ void ob_init(unsigned int size)
 	ob.begin = 0;
 	ob.end = 0;
 	ob.lazy = 0;
+	ob.notify = notify;
 	ob.chunks[0].chunkSize = 0;
 }
 
@@ -61,7 +62,7 @@ static inline unsigned successor(unsigned i)
  */
 static void output_buffer_expand(unsigned i)
 {
-	int was_empty = !ob.lazy || ob_is_empty();
+	int was_empty = ob.notify != NULL && (!ob.lazy || ob_is_empty());
 
 	assert(i == (ob.end + 1) % ob.size);
 	assert(i != ob.end);
@@ -72,7 +73,7 @@ static void output_buffer_expand(unsigned i)
 		/* if the buffer was empty, the player thread might be
 		   waiting for us; wake it up now that another decoded
 		   buffer has become available. */
-		notify_signal(&pc.notify);
+		notify_signal(ob.notify);
 }
 
 void ob_flush(void)

src/outputBuffer.h

@@ -19,6 +19,7 @@
 #ifndef OUTPUT_BUFFER_H
 #define OUTPUT_BUFFER_H
 
+#include "notify.h"
 #include "pcm_utils.h"
 
 #define OUTPUT_BUFFER_DC_STOP   -1
@@ -55,9 +56,11 @@ typedef struct _OutputBuffer {
 
 	AudioFormat audioFormat;
 	ConvState convState;
+
+	Notify *notify;
 } OutputBuffer;
 
-void ob_init(unsigned int size);
+void ob_init(unsigned int size, Notify *notify);
 
 void ob_free(void);
 

src/playerData.c

@@ -72,7 +72,7 @@ void initPlayerData(void)
 		buffered_before_play = buffered_chunks;
 	}
 
-	ob_init(buffered_chunks);
+	ob_init(buffered_chunks, &pc.notify);
 
 	notify_init(&pc.notify);
 	pc.error = PLAYER_ERROR_NOERROR;