MediaConnection: BufferSize should be inherited

* While it's trivial for audio to calculate the buffer size,
it isn't the same for video.

headers/private/media/experimental/MediaConnection.h

@@ -51,7 +51,7 @@ public:
 
 	// Represents the buffer size, depends on the format set or negotiated
 	// for this connection.
-	size_t							BufferSize() const;
+	virtual size_t					BufferSize() const = 0;
 
 	// Disconnect this connection. When a connection is disconnected,
 	// it can be reused as brand new.

headers/private/media/experimental/SimpleMediaClient.h

@@ -114,6 +114,9 @@ public:
 
 			void*					Cookie() const;
 
+	virtual size_t					BufferSize() const;
+	virtual void					SetBufferSize(size_t bufferSize);
+
 protected:
 									BSimpleMediaConnection(
 										media_connection_kinds kinds);
@@ -122,6 +125,8 @@ protected:
 			process_hook			fProcessHook;
 			notify_hook				fNotifyHook;
 			void*					fBufferCookie;
+
+			size_t					fBufferSize;
 };
 
 

src/kits/media/experimental/MediaConnection.cpp

@@ -120,25 +120,6 @@ BMediaConnection::Release()
 }
 
 
-size_t
-BMediaConnection::BufferSize() const
-{
-	CALLED();
-
-	switch (fConnection.format.type) {
-		case B_MEDIA_RAW_AUDIO:
-			return fConnection.format.u.raw_audio.buffer_size;
-
-		case B_MEDIA_RAW_VIDEO:
-			return fConnection.format.u.raw_video.display.bytes_per_row *
-				fConnection.format.u.raw_video.display.line_count;
-
-		default:
-			return 0;
-	}
-}
-
-
 void
 BMediaConnection::Connected(const media_format& format)
 {

src/kits/media/experimental/SimpleMediaClient.cpp

@@ -150,6 +150,20 @@ BSimpleMediaConnection::Cookie() const
 }
 
 
+size_t
+BSimpleMediaConnection::BufferSize() const
+{
+	return fBufferSize;
+}
+
+
+void
+BSimpleMediaConnection::SetBufferSize(size_t bufferSize)
+{
+	fBufferSize = bufferSize;
+}
+
+
 BSimpleMediaInput::BSimpleMediaInput()
 	:
 	BMediaConnection(B_MEDIA_INPUT),