/* mpg2enc.h, defines and types                                             *//* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. *//* * Disclaimer of Warranty * * These software programs are available to the user without any license fee or * royalty on an "as is" basis.  The MPEG Software Simulation Group disclaims * any and all warranties, whether express, implied, or statuary, including any * implied warranties or merchantability or of fitness for a particular * purpose.  In no event shall the copyright-holder be liable for any * incidental, punitive, or consequential damages of any kind whatsoever * arising from the use of these programs. * * This disclaimer of warranty extends to the user of these programs and user's * customers, employees, agents, transferees, successors, and assigns. * * The MPEG Software Simulation Group does not represent or warrant that the * programs furnished hereunder are free of infringement of any third-party * patents. * * Commercial implementations of MPEG-1 and MPEG-2 video, including shareware, * are subject to royalty fees to patent holders.  Many of these patents are * general enough such that they are unavoidable regardless of implementation * design. * */#define PICTURE_START_CODE 0x100L#define SLICE_MIN_START    0x101L#define SLICE_MAX_START    0x1AFL#define USER_START_CODE    0x1B2L#define SEQ_START_CODE     0x1B3L#define EXT_START_CODE     0x1B5L#define SEQ_END_CODE       0x1B7L#define GOP_START_CODE     0x1B8L#define ISO_END_CODE       0x1B9L#define PACK_START_CODE    0x1BAL#define SYSTEM_START_CODE  0x1BBL/* picture coding type */#define I_TYPE 1#define P_TYPE 2#define B_TYPE 3#define D_TYPE 4/* picture structure */#define TOP_FIELD     1#define BOTTOM_FIELD  2#define FRAME_PICTURE 3/* macroblock type */#define MB_INTRA    1#define MB_PATTERN  2#define MB_BACKWARD 4#define MB_FORWARD  8#define MB_QUANT    16/* motion_type */#define MC_FIELD 1#define MC_FRAME 2#define MC_16X8  2#define MC_DMV   3/* mv_format */#define MV_FIELD 0#define MV_FRAME 1/* chroma_format */#define CHROMA420 1#define CHROMA422 2#define CHROMA444 3/* extension start code IDs */#define SEQ_ID       1#define DISP_ID      2#define QUANT_ID     3#define SEQSCAL_ID   5#define PANSCAN_ID   7#define CODING_ID    8#define SPATSCAL_ID  9#define TEMPSCAL_ID 10/* inputtype */#define T_Y_U_V 0#define T_YUV   1#define T_PPM   2/* macroblock information */struct mbinfo {  int mb_type; /* intra/forward/backward/interpolated */  int motion_type; /* frame/field/16x8/dual_prime */  int dct_type; /* field/frame DCT */  int mquant; /* quantization parameter */  int cbp; /* coded block pattern */  int skipped; /* skipped macroblock */  int MV[2][2][2]; /* motion vectors */  int mv_field_sel[2][2]; /* motion vertical field select */  int dmvector[2]; /* dual prime vectors */  double act; /* activity measure */  int var; /* for debugging */};/* motion data */struct motion_data {  int forw_hor_f_code,forw_vert_f_code; /* vector range */  int sxf,syf; /* search range */  int back_hor_f_code,back_vert_f_code;  int sxb,syb;};