MediaStreamer: Extend API to support DVD navigation

* This is a general review of the code and includes a rework
 of the sniffing API.

headers/os/codec/CodecRoster.h

@@ -44,7 +44,7 @@ public:
 	static void			ReleaseEncoder(BEncoder* encoder);
 
 	static status_t		InstantiateStreamer(BStreamer** streamer,
-							BUrl url, BDataIO** source);
+							BUrl url);
 	static void			ReleaseStreamer(BStreamer* streamer);
 
 	static status_t		GetDecoderInfo(BDecoder* decoder,

headers/os/codec/MediaExtractor.h

@@ -11,6 +11,7 @@
 
 
 #include <Decoder.h>
+#include <MediaStreamer.h>
 #include <Reader.h>
 
 
@@ -23,6 +24,8 @@ struct stream_info;
 class BMediaExtractor {
 public:
 								BMediaExtractor(BDataIO* source, int32 flags);
+								// TODO
+								//BMediaExtractor(BMediaStreamer* streamer);
 								~BMediaExtractor();
 
 			status_t			InitCheck();

headers/os/codec/MediaStreamer.h

@@ -6,6 +6,7 @@
 #define _MEDIA_STREAMER_H
 
 
+#include <MediaIO.h>
 #include <Streamer.h>
 #include <Url.h>
 
@@ -18,11 +19,34 @@ public:
 								BMediaStreamer(BUrl url);
 								~BMediaStreamer();
 
-			status_t			CreateAdapter(BDataIO** adapter);
+			status_t			InitCheck() const;
+
+			// TODO: So, it seems since this API was not public,
+			// the memory ownership is leaved to class users.
+			// See if this fits our plans, and eventually, move
+			// this memory management from BMediaFile to BMediaExtractor,
+			// BMediaWriter and BMediaStreamer.
+			BMediaIO*			Adapter() const;
+
+			// TODO: Don't we need an open in the extractor and writer?
+			status_t			Open();
+			void				Close();
+			bool				IsOpened() const;
+
+			//uint32			Capabilities() const;
+			//status_t			GetMetaData(BMetaData* data) const;
+			//status_t			SetHandler(BHandler* handler);
+			//BHandler*			Handler() const;
+
+			void				MouseMoved(uint32 x, uint32 y);
+			void				MouseDown(uint32 x, uint32 y);
 
 private:
 			BUrl				fUrl;
 			BStreamer*			fStreamer;
+			status_t			fInitCheck;
+
+			bool				fOpened;
 
 			// No virtual padding needed. Looks like a design decision.
 			// Let's respect that, for now.

headers/os/codec/Streamer.h

@@ -20,7 +20,12 @@ namespace BPrivate {
 
 class BStreamer {
 public:
-	virtual status_t			Sniff(const BUrl& url, BDataIO** source) = 0;
+	virtual status_t			Sniff(const BUrl& url) = 0;
+	virtual BMediaIO*			Adapter() const = 0;
+
+	// Base impl does nothing
+	virtual void				MouseMoved(uint32 x, uint32 y);
+	virtual void				MouseDown(uint32 x, uint32 y);
 
 protected:
 								BStreamer();

src/kits/codec/CodecRoster.cpp

@@ -101,10 +101,9 @@ BCodecRoster::ReleaseEncoder(BEncoder* encoder)
 
 
 status_t
-BCodecRoster::InstantiateStreamer(BStreamer** streamer, BUrl url,
-	BDataIO** source)
+BCodecRoster::InstantiateStreamer(BStreamer** streamer, BUrl url)
 {
-	return gPluginManager.CreateStreamer(streamer, url, source);
+	return gPluginManager.CreateStreamer(streamer, url);
 }
 
 

src/kits/codec/MediaStreamer.cpp

@@ -6,11 +6,12 @@
 
 #include "MediaStreamer.h"
 
+#include <CodecRoster.h>
+
 #include <stdio.h>
 #include <string.h>
 
 #include "MediaDebug.h"
-
 #include "PluginManager.h"
 
 
@@ -19,11 +20,14 @@ namespace BCodecKit {
 
 BMediaStreamer::BMediaStreamer(BUrl url)
 	:
-	fStreamer(NULL)
+	fUrl(url),
+	fStreamer(NULL),
+	fInitCheck(B_OK),
+	fOpened(false)
 {
+	// TODO: ideally we should see if the url IsValid() and
+	// matches our protocol.
 	CALLED();
-
-	fUrl = url;
 }
 
 
@@ -31,22 +35,67 @@ BMediaStreamer::~BMediaStreamer()
 {
 	CALLED();
 
-	if (fStreamer != NULL)
-		gPluginManager.DestroyStreamer(fStreamer);
+	if (fOpened)
+		Close();
 }
 
 
 status_t
-BMediaStreamer::CreateAdapter(BDataIO** adapter)
+BMediaStreamer::InitCheck() const
+{
+	return fInitCheck;
+}
+
+
+status_t
+BMediaStreamer::Open()
 {
 	CALLED();
 
+	fOpened = true;
+
 	// NOTE: Consider splitting the streamer creation and
 	// sniff in PluginManager.
 	if (fStreamer != NULL)
-		gPluginManager.DestroyStreamer(fStreamer);
+		BCodecRoster::ReleaseStreamer(fStreamer);
 
-	return gPluginManager.CreateStreamer(&fStreamer, fUrl, adapter);
+	return BCodecRoster::InstantiateStreamer(&fStreamer, fUrl);
+}
+
+
+void
+BMediaStreamer::Close()
+{
+	if (fStreamer != NULL)
+		BCodecRoster::ReleaseStreamer(fStreamer);
+}
+
+
+bool
+BMediaStreamer::IsOpened() const
+{
+	return fOpened;
+}
+
+
+BMediaIO*
+BMediaStreamer::Adapter() const
+{
+	return fStreamer->Adapter();
+}
+
+
+void
+BMediaStreamer::MouseMoved(uint32 x, uint32 y)
+{
+	fStreamer->MouseMoved(x, y);
+}
+
+
+void
+BMediaStreamer::MouseDown(uint32 x, uint32 y)
+{
+	fStreamer->MouseDown(x, y);
 }
 
 

src/kits/codec/PluginManager.cpp

@@ -602,7 +602,7 @@ PluginManager::DestroyEncoder(BEncoder* encoder)
 
 
 status_t
-PluginManager::CreateStreamer(BStreamer** streamer, BUrl url, BDataIO** source)
+PluginManager::CreateStreamer(BStreamer** streamer, BUrl url)
 {
 	BAutolock _(fLocker);
 
@@ -645,10 +645,8 @@ PluginManager::CreateStreamer(BStreamer** streamer, BUrl url, BDataIO** source)
 		(*streamer)->fMediaPlugin = plugin;
 		plugin->fRefCount++;
 
-		BDataIO* streamSource = NULL;
-		if ((*streamer)->Sniff(url, &streamSource) == B_OK) {
+		if ((*streamer)->Sniff(url) == B_OK) {
 			TRACE("PluginManager::CreateStreamer: Sniff success\n");
-			*source = streamSource;
 			return B_OK;
 		}
 

src/kits/codec/Streamer.cpp

@@ -22,6 +22,18 @@ BStreamer::~BStreamer()
 }
 
 
+void
+BStreamer::MouseMoved(uint32 x, uint32 y)
+{
+}
+
+
+void
+BStreamer::MouseDown(uint32 x, uint32 y)
+{
+}
+
+
 void BStreamer::_ReservedStreamer1() {}
 void BStreamer::_ReservedStreamer2() {}
 void BStreamer::_ReservedStreamer3() {}

src/kits/media/MediaFile.cpp

@@ -604,7 +604,8 @@ BMediaFile::_InitStreamer(const BUrl& url, BDataIO** adapter)
 		return;
 	}
 
-	fErr = fStreamer->CreateAdapter(adapter);
+	fErr = fStreamer->Open();
+	*adapter = fStreamer->Adapter();
 }
 
 /*