codec_kit: First half

* Move all codec stuff into libcodec.so

headers/os/codec/DecoderPlugin.h

@@ -0,0 +1,80 @@
+#ifndef _DECODER_PLUGIN_H
+#define _DECODER_PLUGIN_H
+
+#include <MediaTrack.h>
+#include <MediaFormats.h>
+#include "MediaPlugin.h"
+
+
+namespace BPrivate { namespace media {
+
+class PluginManager;
+
+class ChunkProvider {
+public:
+	virtual						~ChunkProvider() {};
+	virtual	status_t			GetNextChunk(const void** chunkBuffer,
+									size_t* chunkSize,
+									media_header* mediaHeader) = 0;
+};
+
+class Decoder {
+public:
+								Decoder();
+	virtual						~Decoder();
+
+	virtual	void				GetCodecInfo(media_codec_info* codecInfo) = 0;
+
+	// Setup get's called with the info data from Reader::GetStreamInfo
+	virtual	status_t			Setup(media_format* ioEncodedFormat,
+									const void* infoBuffer,
+									size_t infoSize) = 0;
+
+	virtual	status_t			NegotiateOutputFormat(
+									media_format* ioDecodedFormat) = 0;
+	
+	virtual	status_t			SeekedTo(int64 frame, bigtime_t time) = 0;
+							 
+	virtual status_t			Decode(void* buffer, int64* frameCount,
+									media_header* mediaHeader,
+									media_decode_info* info = 0) = 0;
+							   
+			status_t			GetNextChunk(const void** chunkBuffer,
+									size_t* chunkSize,
+									media_header* mediaHeader);
+
+			void				SetChunkProvider(ChunkProvider* provider);
+
+	virtual status_t			Perform(perform_code code, void* data);
+
+private:
+	virtual void				_ReservedDecoder1();
+	virtual void				_ReservedDecoder2();
+	virtual void				_ReservedDecoder3();
+	virtual void				_ReservedDecoder4();
+	virtual void				_ReservedDecoder5();
+
+			ChunkProvider*		fChunkProvider;
+
+	// needed for plug-in reference count management
+	friend class PluginManager;
+			MediaPlugin*		fMediaPlugin;
+
+			uint32				fReserved[5];
+};
+
+
+class DecoderPlugin : public virtual MediaPlugin {
+public:
+								DecoderPlugin();
+
+	virtual	Decoder*			NewDecoder(uint index) = 0;
+	virtual	status_t			GetSupportedFormats(media_format** formats,
+									size_t* count) = 0;
+};
+
+} } // namespace BPrivate::media
+
+using namespace BPrivate::media;
+
+#endif // _DECODER_PLUGIN_H