music_pipe: more wrapper functions

Replace all direct music_pipe struct accesses with wrapper functions.
The compiled machine code is the same, but this way, we can change
struct internals more easily.

1 files changed, 27 insertions, 0 deletions

diff --git a/src/pipe.h b/src/pipe.h
index 10a3501ec..3af0bbd16 100644
--- a/src/pipe.h
+++ b/src/pipe.h
@@ -76,12 +76,30 @@ void music_pipe_flush(void);
  */
 void music_pipe_set_lazy(bool lazy);
 
+static inline unsigned
+music_pipe_size(void)
+{
+	return ob.size;
+}
+
 /** is the buffer empty? */
 static inline bool music_pipe_is_empty(void)
 {
 	return ob.begin == ob.end;
 }
 
+static inline bool
+music_pipe_head_is(unsigned i)
+{
+	return !music_pipe_is_empty() && ob.begin == i;
+}
+
+static inline unsigned
+music_pipe_tail_index(void)
+{
+	return ob.end;
+}
+
 void music_pipe_shift(void);
 
 /**
@@ -102,6 +120,15 @@ int music_pipe_absolute(const unsigned relative);
 struct music_chunk *
 music_pipe_get_chunk(const unsigned i);
 
+static inline struct music_chunk *
+music_pipe_peek(void)
+{
+	if (music_pipe_is_empty())
+		return NULL;
+
+	return music_pipe_get_chunk(ob.begin);
+}
+
 /**
  * Append a data block to the buffer.
  *