PluginManager/AddOnManager: Add streamers support code

headers/private/media/PluginManager.h

@@ -14,6 +14,7 @@
 #include "DecoderPlugin.h"
 #include "EncoderPlugin.h"
 #include "ReaderPlugin.h"
+#include "StreamerPlugin.h"
 #include "WriterPlugin.h"
 
 #include <TList.h>
@@ -58,7 +59,11 @@ public:
 									const media_format& format);
 
 			void				DestroyEncoder(Encoder* encoder);
-	
+
+			status_t			CreateStreamer(Streamer** streamer,
+									BUrl* url, BDataIO** source);
+			void				DestroyStreamer(Streamer* streamer);
+
 private:
 			status_t			_LoadPlugin(const entry_ref& ref,
 									MediaPlugin** plugin, image_id* image);

src/kits/media/AddOnManager.cpp

@@ -203,6 +203,23 @@ AddOnManager::GetReaders(entry_ref* outRefs, int32* outCount,
 }
 
 
+status_t
+AddOnManager::GetStreamers(entry_ref* outRefs, int32* outCount,
+	int32 maxCount)
+{
+	BAutolock locker(fLock);
+	RegisterAddOns();
+
+	streamer_info* info;
+	for (fStreamerList.Rewind(); fStreamerList.GetNext(&info);) {
+			*outRefs = info->ref;
+			outRefs++;
+	}
+
+	return B_ERROR;
+}
+
+
 status_t
 AddOnManager::GetEncoder(entry_ref* _encoderRef, int32 id)
 {

src/kits/media/AddOnManager.h

@@ -45,6 +45,9 @@ public:
 			status_t			GetReaders(entry_ref* _ref,
 									int32* _count, int32 maxCount);
 
+			status_t			GetStreamers(entry_ref* _ref,
+									int32* _count, int32 maxCount);
+
 			status_t			GetEncoder(entry_ref* _ref, int32 id);
 
 			status_t			GetWriter(entry_ref* _ref,

src/kits/media/PluginManager.cpp

@@ -20,6 +20,7 @@
 PluginManager gPluginManager;
 
 #define BLOCK_SIZE 4096
+#define MAX_STREAMERS 40
 
 
 class BMediaIOWrapper : public BMediaIO {
@@ -580,6 +581,79 @@ PluginManager::DestroyEncoder(Encoder* encoder)
 }
 
 
+status_t
+PluginManager::CreateStreamer(Streamer** streamer, BUrl* url, BDataIO** source)
+{
+	TRACE("PluginManager::CreateStreamer enter\n");
+
+	entry_ref refs[MAX_STREAMERS];
+	int32 count;
+
+	status_t ret = AddOnManager::GetInstance()->GetStreamers(refs, &count,
+		MAX_STREAMERS);
+	if (ret != B_OK) {
+		printf("PluginManager::CreateStreamer: can't get list of readers: %s\n",
+			strerror(ret));
+		return ret;
+	}
+
+	// try each reader by calling it's Sniff function...
+	for (int32 i = 0; i < count; i++) {
+		entry_ref ref = refs[i];
+		MediaPlugin* plugin = GetPlugin(ref);
+		if (plugin == NULL) {
+			printf("PluginManager::CreateStreamer: GetPlugin failed\n");
+			return B_ERROR;
+		}
+
+		StreamerPlugin* streamerPlugin = dynamic_cast<StreamerPlugin*>(plugin);
+		if (streamerPlugin == NULL) {
+			printf("PluginManager::CreateStreamer: dynamic_cast failed\n");
+			PutPlugin(plugin);
+			return B_ERROR;
+		}
+
+		*streamer = streamerPlugin->NewStreamer();
+		if (*streamer == NULL) {
+			printf("PluginManager::CreateStreamer: NewReader failed\n");
+			PutPlugin(plugin);
+			return B_ERROR;
+		}
+
+		(*streamer)->fMediaPlugin = plugin;
+
+		BMediaIO* streamSource = NULL;
+		if ((*streamer)->Sniff(url, &streamSource) == B_OK) {
+			TRACE("PluginManager::CreateStreamer: Sniff success ");
+			*source = streamSource;
+			return B_OK;
+		}
+
+		DestroyStreamer(*streamer);
+		*streamer = NULL;
+	}
+
+	TRACE("PluginManager::CreateStreamer leave\n");
+	return B_MEDIA_NO_HANDLER;
+}
+
+
+void
+PluginManager::DestroyStreamer(Streamer* streamer)
+{
+	if (streamer != NULL) {
+		TRACE("PluginManager::DestroyStreamer(%p, plugin: %p)\n", streamer,
+			streamer->fMediaPlugin);
+		// NOTE: We have to put the plug-in after deleting the encoder,
+		// since otherwise we may actually unload the code for the
+		// destructor...
+		MediaPlugin* plugin = streamer->fMediaPlugin;
+		delete streamer;
+		PutPlugin(plugin);
+	}
+}
+
+
 // #pragma mark -
 
 

src/kits/media/StreamerPlugin.cpp

@@ -1,8 +1,14 @@
+/*
+ * Copyright 2016, Dario Casalinuovo. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
 
 #include "StreamerPlugin.h"
 
 
 Streamer::Streamer()
+	:
+	fMediaPlugin(NULL)
 {
 }
 
@@ -12,33 +18,8 @@ Streamer::~Streamer()
 }
 
 
-void
-Streamer::_ReservedStreamer1()
-{
-}
-
-
-void
-Streamer::_ReservedStreamer2()
-{
-}
-
-
-
-void
-Streamer::_ReservedStreamer3()
-{
-}
-
-
-
-void
-Streamer::_ReservedStreamer4()
-{
-}
-
-
-void
-Streamer::_ReservedStreamer5()
-{
-}
+void Streamer::_ReservedStreamer1() {}
+void Streamer::_ReservedStreamer2() {}
+void Streamer::_ReservedStreamer3() {}
+void Streamer::_ReservedStreamer4() {}
+void Streamer::_ReservedStreamer5() {}