oggstream.h

一个播放器 使用了evc 大家可以参考下 哦

/*******************************************************************************
*                                                                              *
* Copyright (c) 2001, Tobias Waldvogel                                         *
* All rights reserved.                                                         *
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#ifndef _OggStream_
#define _OggStream_

#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus*/

//#include "../ogglib/lib/ogg.h"
//#include "../ogglib/lib/codec.h"
#include "../ogglib/lib/ogg.h"
#include "../ogglib/lib/ivorbiscodec.h"

// "reference time" in this file is defined as 100ns units


// These are the identifiers in the header package
#define MT_Video	"video"
#define MT_Audio	"audio"
#define MT_Text		"text"

// One second in reference time
#define SEC_IN_REFTIME 10000000
	
typedef struct stream_header_video
{
	ogg_int32_t	width;
	ogg_int32_t	height;
} stream_header_video;
	
typedef struct stream_header_audio
{
	ogg_int16_t	channels;
	ogg_int16_t	blockalign;
	ogg_int32_t	avgbytespersec;
} stream_header_audio;

// This structure is used as header packet
// The library use this structure similar to
// vorbis_info for vorbis
typedef struct stream_header
{
	char	streamtype[8];
	char	subtype[4];

	ogg_int32_t	size;				// size of the structure

	ogg_int64_t	time_unit;			// in reference time
	ogg_int64_t	samples_per_unit;
	ogg_int32_t default_len;		// in media time

	ogg_int32_t buffersize;
	ogg_int16_t	bits_per_sample;

	union
	{
		// Video specific
		stream_header_video	video;
		// Audio specific
		stream_header_audio	audio;
	};
} stream_header;

typedef struct stream_state
{
	bool				initial;
	ogg_int64_t			lastpno;
	ogg_int64_t			lastpos;
	ogg_int32_t			lastsize;

	// For creating streams ...
	unsigned char*		buffer;
	int					bufferlen;
	ogg_int64_t			packetno;
	ogg_stream_state	os;
} stream_state;


extern void			stream_header_init(stream_header* sh);
extern void			stream_header_clear(stream_header* sh);
extern int			stream_header_setup_video(stream_header** sh, char* FOURCC,
										ogg_int64_t avg_time_per_frame,
										ogg_int32_t	width, 	ogg_int32_t	height,
										ogg_int16_t	bit_count,
										ogg_int32_t buffersize);
extern int			stream_header_setup_audio(stream_header** sh, ogg_int16_t audioid,
										ogg_int16_t channels,
										ogg_int16_t	blockalign,
										ogg_int32_t	avgbytespersec,
										ogg_int32_t samplespersec,
										ogg_int16_t	bitspersample,
										unsigned char* extradata,
										ogg_int32_t extralen,
										ogg_int32_t buffersize);
extern int			stream_header_setup_text(stream_header** sh);

extern int			stream_header_in(stream_header** sh, ogg_packet* op);
extern int			stream_headerout_header(stream_state* ss, stream_header* sh);
extern int			stream_headerout_comment(stream_state* ss, vorbis_comment* vc);
extern int			stream_headerout_codebook(stream_state* ss, stream_header* sh);

extern void			stream_state_init(stream_state* ss, int serialno);
extern void			stream_state_clear(stream_state* ss);
extern void			stream_state_reset(stream_state* ss);


extern int			stream_samplein_getbuffer(stream_state* ss,
											  unsigned char** buffer, int len);
extern int			stream_samplein_vorbis(stream_state* ss, vorbis_info* vi,
										bool eos,
										ogg_int64_t* mediastart, ogg_int64_t* refstart,
										int samplesize);
extern int			stream_samplein(stream_state* ss, stream_header* sh,
										bool eos, bool sync,
										ogg_int64_t* mediastart, ogg_int64_t* medialen,
										ogg_int64_t* refstart,   ogg_int64_t* refstop,
										int samplesize);
extern int			stream_sampleout_vorbis(stream_state* ss, vorbis_info* vi,
										bool* eos,
										ogg_int64_t* mediastart, ogg_int64_t* refstart,
										unsigned char** buffer, int* bufferlen);
extern int			stream_sampleout(stream_state* ss, stream_header* sh,
									   bool* eos, bool* sync,
									   ogg_int64_t* refstart,
									   unsigned char** buffer, int* bufferlen);


extern ogg_int32_t	stream_packet_len(stream_header* sh, ogg_packet* op,ogg_int16_t lenbytes);


ogg_int64_t reference_time_to_mediatime(ogg_int64_t time_unit,	ogg_int64_t	samples_per_unit,
										ogg_int64_t reftime);
ogg_int64_t mediatime_to_reference_time(ogg_int64_t time_unit,	ogg_int64_t	samples_per_unit,
										ogg_int64_t mediatime);
										
#define PACKET_TYPE_HEADER		0x01
#define PACKET_TYPE_COMMENT		0x03
#define PACKET_TYPE_CODEBOOK	0x05
#define PACKET_TYPE_BITS		0x07

#define	PACKET_IS_SYNCPOINT		0x08
#define PACKET_LEN_BITS01		0xc0
#define PACKET_LEN_BITS2		0x02

#define E_INVPOINTER			-2048
#define E_NOTDATA				-2049
#define E_NOTHEADER				-2050
#define E_UNKNOWNHEADER			-2051
#define E_TIMEINVAILD			-2052

#define	E_SUCCESS				0

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif