nal.c File Reference

Handles the operations on converting String of Data Bits (SODB) to Raw Byte Sequence Payload (RBSP), and then onto Encapsulate Byte Sequence Payload (EBSP). More...

#include "contributors.h"
#include "global.h"
#include "enc_statistics.h"
#include "biariencode.h"

Include dependency graph for nal.c:

Go to the source code of this file.

Functions
void	SODBtoRBSP (Bitstream *currStream)
int	RBSPtoEBSP (byte *NaluBuffer, unsigned char *rbsp, int rbsp_size)
int	addCabacZeroWords (ImageParameters *p_Img, NALU_t *nalu, StatParameters *cur_stats)
Variables
static const int	MbWidthC [4] = { 0, 8, 8, 16}
static const int	MbHeightC [4] = { 0, 8, 16, 16}

---

Detailed Description

Handles the operations on converting String of Data Bits (SODB) to Raw Byte Sequence Payload (RBSP), and then onto Encapsulate Byte Sequence Payload (EBSP).

nal.c

Date:

14 June 2002

Author:

Main contributors (see contributors.h for copyright, address and affiliation details)

• Shankar Regunathan <shanre@microsoft.de>
• Stephan Wenger <stewe@cs.tu-berlin.de>

Definition in file nal.c.

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Function Documentation

int addCabacZeroWords	(	ImageParameters *	p_Img,
		NALU_t *	nalu,
		StatParameters *	cur_stats
	)

This function adds cabac_zero_word syntax elements at the end of the NAL unit to.

Parameters:

	p_Img	ImageParameters structure
	nalu	target NAL unit
	cur_stats	currently used statistics parameters

Returns:

number of added bytes

Definition at line 114 of file nal.c.

References nalu_t::buf, and nalu_t::len.

Referenced by terminate_slice().

int RBSPtoEBSP	(	byte *	NaluBuffer,
		unsigned char *	rbsp,
		int	rbsp_size
	)

This function add emulation_prevention_three_byte for all occurrences of the following byte sequences in the stream 0x000000 -> 0x00000300 0x000001 -> 0x00000301 0x000002 -> 0x00000302 0x000003 -> 0x00000303.

Parameters:

	NaluBuffer	pointer to target buffer
	rbsp	pointer to source buffer
	rbsp_size	Size of source

Returns:

Size target buffer after emulation prevention.

Definition at line 73 of file nal.c.

Referenced by RBSPtoNALU(), and terminate_slice().

void SODBtoRBSP

(

Bitstream *

currStream

)

Converts String Of Data Bits (SODB) to Raw Byte Sequence Packet (RBSP).

Parameters:

currStream

Bitstream which contains data bits.

Returns:

None

Note:

currStream is byte-aligned at the end of this function

Definition at line 39 of file nal.c.

References Bitstream::bits_to_go, Bitstream::byte_buf, Bitstream::byte_pos, and Bitstream::streamBuffer.

Referenced by GeneratePic_parameter_set_rbsp(), GenerateSEImessage_rbsp(), GenerateSeq_parameter_set_rbsp(), and terminate_slice().