elements.h File Reference

Header file for elements in H.264 streams. More...

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Defines
#define	SE_HEADER   0
#define	SE_PTYPE   1
#define	SE_MBTYPE   2
#define	SE_REFFRAME   3
#define	SE_INTRAPREDMODE   4
#define	SE_MVD   5
#define	SE_CBP_INTRA   6
#define	SE_LUM_DC_INTRA   7
#define	SE_CHR_DC_INTRA   8
#define	SE_LUM_AC_INTRA   9
#define	SE_CHR_AC_INTRA   10
#define	SE_CBP_INTER   11
#define	SE_LUM_DC_INTER   12
#define	SE_CHR_DC_INTER   13
#define	SE_LUM_AC_INTER   14
#define	SE_CHR_AC_INTER   15
#define	SE_DELTA_QUANT_INTER   16
#define	SE_DELTA_QUANT_INTRA   17
#define	SE_BFRAME   18
#define	SE_EOS   19
#define	SE_MAX_ELEMENTS   20
#define	NO_EC   0
#define	EC_REQ   1
#define	EC_SYNC   2
#define	MAXPARTITIONMODES   2
Variables
static const byte	assignSE2partition [][SE_MAX_ELEMENTS]

---

Detailed Description

Header file for elements in H.264 streams.

Date:

6.10.2000

Version:

1.0

Author:

Sebastian Purreiter <sebastian.purreiter@mch.siemens.de>
Siemens AG, Information and Communication Mobile
P.O.Box 80 17 07
D-81617 Munich, Germany

Definition in file elements.h.

---

Define Documentation

#define EC_REQ   1

error concealment required

Definition at line 72 of file elements.h.

Referenced by get_concealed_element(), and set_ec_flag().

#define EC_SYNC   2

search and sync on next header element

Definition at line 73 of file elements.h.

#define MAXPARTITIONMODES   2

maximum possible partition modes as defined in assignSE2partition[][]

Definition at line 75 of file elements.h.

#define NO_EC   0

no error concealment necessary

Definition at line 71 of file elements.h.

Referenced by get_concealed_element(), and reset_ec_flags().

#define SE_HEADER   0

Assignment of old TYPE partition elements to new elements.

definition of H.264 syntax elements order of elements follow dependencies for picture reconstruction

old element | new elements ----------------+------------------------------------------------------------------- TYPE_HEADER | SE_HEADER, SE_PTYPE TYPE_MBHEADER | SE_MBTYPE, SE_REFFRAME, SE_INTRAPREDMODE TYPE_MVD | SE_MVD TYPE_CBP | SE_CBP_INTRA, SE_CBP_INTER SE_DELTA_QUANT_INTER SE_DELTA_QUANT_INTRA TYPE_COEFF_Y | SE_LUM_DC_INTRA, SE_LUM_AC_INTRA, SE_LUM_DC_INTER, SE_LUM_AC_INTER TYPE_2x2DC | SE_CHR_DC_INTRA, SE_CHR_DC_INTER TYPE_COEFF_C | SE_CHR_AC_INTRA, SE_CHR_AC_INTER TYPE_EOS | SE_EOS

Definition at line 48 of file elements.h.

Referenced by FirstPartOfSliceHeader(), get_concealed_element(), i_v(), pred_weight_table(), read_CBP_and_coeffs_from_NAL_CABAC(), read_CBP_and_coeffs_from_NAL_CAVLC(), read_one_macroblock_b_slice(), read_one_macroblock_i_slice(), read_one_macroblock_p_slice(), ref_pic_list_reordering(), RestOfSliceHeader(), se_v(), set_ec_flag(), u_v(), and ue_v().

---

Variable Documentation

const byte assignSE2partition[][SE_MAX_ELEMENTS] [static]

Initial value:

{
  
  {  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },   
  {  0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 2, 2, 2, 2, 0, 0, 0, 0 }    
}

lookup-table to assign different elements to partition

Note:

here we defined up to 6 different partitions similar to document Q15-k-18 described in the PROGFRAMEMODE. The Sliceheader contains the PSYNC information.

Elements inside a partition are not ordered. They are ordered by occurence in the stream. Assumption: Only partitionlosses are considered.

The texture elements luminance and chrominance are not ordered in the progressive form This may be changed in image.c

We also defined the proposed internet partition mode of Stephan Wenger here. To select the desired mode uncomment one of the two following lines.

-IMPORTANT: Picture- or Sliceheaders must be assigned to partition 0.

Furthermore partitions must follow syntax dependencies as outlined in document Q15-J-23.

Definition at line 103 of file elements.h.

Referenced by cabac_startcode_follows(), FirstPartOfSliceHeader(), pred_weight_table(), read_CBP_and_coeffs_from_NAL_CABAC(), read_CBP_and_coeffs_from_NAL_CAVLC(), read_ipred_modes(), read_motion_info_from_NAL_b_slice(), read_motion_info_from_NAL_p_slice(), read_one_macroblock_b_slice(), read_one_macroblock_i_slice(), read_one_macroblock_p_slice(), readCoeff4x4_CAVLC(), readCompCoeff4x4SMB_CABAC(), readCompCoeff8x8_CABAC(), ref_pic_list_reordering(), RestOfSliceHeader(), and uvlc_startcode_follows().