mpeg2enc.h

jpeg and mpeg 编解码技术源代码

/* mpg2enc.h, 定义和数据类型*/



#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;
};