update to the codec api, docoder assignment is now handled in the server

multiple reader add-ons are probed to recognize a media file
FormatManager does the translation from media_format to media_description


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5667 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/media/MediaDefs.h

@@ -599,6 +599,7 @@ typedef enum {
 	B_WAV_FORMAT_FAMILY = 6,
 	B_AIFF_FORMAT_FAMILY = 7,
 	B_AVR_FORMAT_FAMILY = 8,
+	B_OGG_FORMAT_FAMILY = 9,
 	B_MISC_FORMAT_FAMILY = 99999,
 	B_META_FORMAT_FAMILY = 100000
 } media_format_family;

headers/private/media/DataExchange.h

@@ -106,7 +106,9 @@ enum {
 	SERVER_REMOVEREFFOR,
 	SERVER_REMOVEITEM,
 	SERVER_GET_FORMAT_FOR_DESCRIPTION,
-	SERVER_GET_META_DESCRIPTION_FOR_FORMAT,
+	SERVER_GET_DESCRIPTION_FOR_FORMAT,
+	SERVER_GET_READERS,
+	SERVER_GET_DECODER_FOR_FORMAT,
 	SERVER_MESSAGE_END,
 	NODE_MESSAGE_START = 0x200,
 	
@@ -206,7 +208,7 @@ public:
 private:
 	dev_t	device;
 	ino_t	directory;
-	char	name[B_FILE_NAME_LENGTH];
+	char	name[B_FILE_NAME_LENGTH]; // == 256 bytes
 };
 
 
@@ -243,6 +245,12 @@ enum
 	MAX_NODE_ID = 4000,
 };
 
+// used by SERVER_GET_READERS
+enum
+{
+	MAX_READERS = 40,
+};
+
 struct addonserver_instantiate_dormant_node_request : public request_data
 {
 	media_addon_id addonid;
@@ -889,14 +897,35 @@ struct server_get_format_for_description_reply : public reply_data
 	media_format format;
 };
 
-struct server_get_meta_description_for_format_request : public request_data
+struct server_get_description_for_format_request : public request_data
+{
+	media_format format;
+	media_format_family family;
+};
+
+struct server_get_description_for_format_reply : public reply_data
+{
+	media_format_description description;
+};
+
+struct server_get_decoder_for_format_request : public request_data
 {
 	media_format format;
 };
 
-struct server_get_meta_description_for_format_reply : public reply_data
+struct server_get_decoder_for_format_reply : public reply_data
 {
-	media_format_description description;
+	xfer_entry_ref	ref; // a ref to the decoder
+};
+
+struct server_get_readers_request : public request_data
+{
+};
+
+struct server_get_readers_reply : public reply_data
+{
+	xfer_entry_ref	ref[MAX_READERS]; // a list of refs to the reader
+	int32			count;
 };
 
 struct node_request_completed_command : public command_data

headers/private/media/DecoderPlugin.h

@@ -6,6 +6,8 @@
 #include "MediaPlugin.h"
 #include "MediaExtractor.h"
 
+class AddOnManager;
+
 namespace BPrivate { namespace media {
 
 class Decoder
@@ -41,11 +43,19 @@ private:
 class DecoderPlugin : public MediaPlugin
 {
 public:
-	DecoderPlugin();
+						DecoderPlugin();
 
-	virtual Decoder *NewDecoder() = 0;
+	virtual Decoder *	NewDecoder() = 0;
 	
-	status_t PublishDecoder(const char *meta_description, const char *short_name, const char *pretty_name, const char *default_mapping = 0);
+	status_t 			PublishDecoder(const char *meta_description,
+									   const char *short_name,
+									   const char *pretty_name,
+									   const char *default_mapping = 0);
+
+private:
+	friend class AddOnManager;
+	void				Setup(void *publish_hook);
+	void *				fPublishHook;
 };
 
 } } // namespace BPrivate::media

headers/private/media/PluginManager.h

@@ -24,11 +24,11 @@ public:
 					PluginManager();
 					~PluginManager();
 	
-	MediaPlugin *	GetPlugin(const char *name);
+	MediaPlugin *	GetPlugin(const entry_ref &ref);
 	void			PutPlugin(MediaPlugin *plugin);
 	
 private:
-	bool			LoadPlugin(const char *name, MediaPlugin **plugin, image_id *image);
+	bool			LoadPlugin(const entry_ref &ref, MediaPlugin **plugin, image_id *image);
 
 	struct plugin_info
 	{