Added BMediaFile::_UnInit() and implemented the two SetTo() methods.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30987 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/media/MediaFile.h

@@ -157,6 +157,7 @@ private:
 			BMediaTrack**		fTrackList;
 
 			void				_Init();
+			void				_UnInit();
 			void				_InitReader(BDataIO* source, int32 flags = 0);
 			void				_InitWriter(BDataIO* source,
 									const media_file_format* mfi, int32 flags);

src/kits/media/MediaFile.cpp

@@ -78,16 +78,25 @@ BMediaFile::BMediaFile(const media_file_format* mfi, int32 flags)
 status_t
 BMediaFile::SetTo(const entry_ref* ref)
 {
-	debugger("BMediaFile::SetTo not implemented");
-	return B_OK;
+	CALLED();
+
+	_UnInit();
+	fDeleteSource = true;
+	_InitReader(new (std::nothrow) BFile(ref, O_RDONLY));
+
+	return fErr;
 }
 
 
 status_t
 BMediaFile::SetTo(BDataIO* destination)
 {
-	debugger("BMediaFile::SetTo not implemented");
-	return B_OK;
+	CALLED();
+
+	_UnInit();
+	_InitReader(destination);
+
+	return fErr;
 }
 
 
@@ -95,11 +104,7 @@ BMediaFile::~BMediaFile()
 {
 	CALLED();
 
-	ReleaseAllTracks();
-	delete[] fTrackList;
-	delete fExtractor;
-	if (fDeleteSource)
-		delete fSource;
+	_UnInit();
 }
 
 
@@ -359,6 +364,23 @@ BMediaFile::_Init()
 }
 
 
+void
+BMediaFile::_UnInit()
+{
+	ReleaseAllTracks();
+	delete[] fTrackList;
+	fTrackList = NULL;
+	fTrackNum = 0;
+	delete fExtractor;
+	fExtractor = NULL;
+	if (fDeleteSource) {
+		delete fSource;
+		fSource = NULL;
+		fDeleteSource = false;
+	}
+}
+
+
 void
 BMediaFile::_InitReader(BDataIO* source, int32 flags)
 {