/* -----------------------------------------------------------------------------
	GSFramework
	Copyright 2001-2013 Emmanuel Julien. All Rights Reserved.
----------------------------------------------------------------------------- */


#ifndef	__AUDIOOGGSTREAM__
#define	__AUDIOOGGSTREAM__


		#include "filesystem/io_handle.h"
	#define	STB_VORBIS_HEADER_ONLY
		#include "stb_vorbis.c"
	#undef	STB_VORBIS_HEADER_ONLY
		#include "audio/stream_interface.h"
		#include "memory/ring_buffer.h"
		#include "memory/nauto_ptr.h"


namespace GS {

/*
	@short	OGG audio stream.
	@author	Emmanuel Julien (ejulien@nworks.fr)
*/
class	AudioStreamOGG : public IAudioStream
{
protected:

		AutoPtr <IO::Handle> h;
		Array <char>	buffer;
		size_t			byte_left;

		size_t			RefillBuffer();
		void			ConsumeBuffer(size_t);

		int				seek_correction, consumed, err;

		stb_vorbis_info	vorbis_info;
		stb_vorbis		*vf;

public:

		/// Return the stream data format (eg. "OGG").
		const char		*GetFormat() { return "OGG"; }

		bool			Seek(int t_ms = 0);
		bool			IsEOF() const;

		size_t			GetPCM(void *);
		size_t			GetPCMBufferSize() const;

		bool			Open(const char *uri);
		void			Close();

		AudioStreamOGG();
		~AudioStreamOGG();
};

} // GS


#endif	// __AUDIOOGGSTREAM__