winamp/Src/h264dec/lcommon/inc/nalucommon.h

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2024-09-24 12:54:57 +00:00
/*!
**************************************************************************************
* \file
* nalucommon.h
* \brief
* NALU handling common to encoder and decoder
* \author
* Main contributors (see contributors.h for copyright, address and affiliation details)
* - Stephan Wenger <stewe@cs.tu-berlin.de>
* - Karsten Suehring <suehring@hhi.de>
***************************************************************************************
*/
#ifndef _NALUCOMMON_H_
#define _NALUCOMMON_H_
#define MAXRBSPSIZE 64000
#define MAXNALUSIZE 64000
//! values for nal_unit_type
typedef enum {
NALU_TYPE_SLICE = 1,
NALU_TYPE_DPA = 2,
NALU_TYPE_DPB = 3,
NALU_TYPE_DPC = 4,
NALU_TYPE_IDR = 5,
NALU_TYPE_SEI = 6,
NALU_TYPE_SPS = 7,
NALU_TYPE_PPS = 8,
NALU_TYPE_AUD = 9,
NALU_TYPE_EOSEQ = 10,
NALU_TYPE_EOSTREAM = 11,
NALU_TYPE_FILL = 12
} NaluType;
//! values for nal_ref_idc
typedef enum {
NALU_PRIORITY_HIGHEST = 3,
NALU_PRIORITY_HIGH = 2,
NALU_PRIORITY_LOW = 1,
NALU_PRIORITY_DISPOSABLE = 0
} NalRefIdc;
//! NAL unit structure
typedef struct nalu_t
{
int startcodeprefix_len; //!< 4 for parameter sets and first slice in picture, 3 for everything else (suggested)
unsigned len; //!< Length of the NAL unit (Excluding the start code, which does not belong to the NALU)
unsigned max_size; //!< NAL Unit Buffer size
int forbidden_bit; //!< should be always FALSE
NaluType nal_unit_type; //!< NALU_TYPE_xxxx
NalRefIdc nal_reference_idc; //!< NALU_PRIORITY_xxxx
byte *buf; //!< contains the first byte followed by the EBSP
uint16 lost_packets; //!< true, if packet loss is detected
} NALU_t;
//! allocate one NAL Unit
extern NALU_t *AllocNALU(int);
//! free one NAL Unit
extern void FreeNALU(NALU_t *n);
#endif