quicktime/fastjpg.h

   1 #ifndef FASTJPG_H
   2 #define FASTJPG_H
   3
   4 #include "sizes.h"
   5
   6 #define TOTAL_HUFF_TBLS  4
   7 #define TOTAL_QUANT_TBLS 4
   8 #define MAXJSAMPLE 255
   9 #define CENTERJSAMPLE 128
  10 #define MAX_COMPS 4
  11 #define DUMMY_COMP 5
  12 #define DCTSIZE1 8
  13 #define DCTSIZE2 64
  14 #define HUFF_LOOKAHEAD 8
  15 #define JPEG_APP1_MJPA 0x6D6A7067
  16 #define RANGE_MASK (MAXJSAMPLE * 4 + 3) /* 2 bits wider than legal samples */
  17
  18 typedef struct
  19 {
  20   unsigned long long hvsample;
  21   unsigned long ac_htbl_num;
  22   unsigned long dc_htbl_num;
  23   unsigned long qtbl_num;
  24   unsigned char id;
  25   long  dc;
  26 } quicktime_jpeg_comp_header;
  27
  28
  29 typedef struct
  30 {
  31         int     valid;
  32         int     field_sz;
  33         int     pad_field_sz;
  34         int     next_off;
  35         int     quant_off;
  36         int     huff_off;
  37         int     image_off;
  38         int     scan_off;
  39         int     data_off;
  40 } quicktime_mjpa_info;
  41
  42 typedef struct
  43 {
  44   long mincode[17];
  45   long maxcode[18];
  46   long valptr[17];
  47   unsigned QUICKTIME_INT16 cache[256];
  48   unsigned char vals[256];
  49   unsigned char bits[17];
  50 } quicktime_jpeg_huffman;
  51
  52 typedef struct
  53 {
  54         int allocated;  /* If these buffers were allocated by fastjpg */
  55         unsigned char *ybuf;
  56         unsigned char *ubuf;
  57         unsigned char *vbuf;
  58 } quicktime_mjpa_buffs;
  59
  60 typedef struct
  61 {
  62   unsigned long Uskip_mask;
  63   long *YUV_Y_tab;
  64   long *YUV_UB_tab;
  65   long *YUV_VR_tab;
  66   long *YUV_UG_tab;
  67   long *YUV_VG_tab;
  68 } quicktime_mjpa_yuvtabs;
  69
  70 typedef struct
  71 {
  72         unsigned char *chunk;
  73         long chunk_size;
  74         long *quant_tables[TOTAL_QUANT_TBLS];
  75         unsigned char *jpg_samp_limit;
  76         unsigned char *byte_limit;
  77         long jpg_num_comps;
  78         long jpg_comps_in_scan;
  79         long jpg_rst_interval;
  80         quicktime_jpeg_comp_header jpg_comps[MAX_COMPS + 1];
  81         char IJPG_Tab1[64];
  82         char IJPG_Tab2[64];
  83         quicktime_jpeg_huffman jpg_ac_huff[TOTAL_HUFF_TBLS];
  84         quicktime_jpeg_huffman jpg_dc_huff[TOTAL_HUFF_TBLS];
  85         QUICKTIME_INT16 jpg_dct_buf[DCTSIZE2];
  86         long jpg_h_bnum;  /* this must be signed */
  87         unsigned long jpg_h_bbuf;
  88         long jpg_nxt_rst_num;
  89         int jpg_dprec;
  90         int jpg_height;
  91         int jpg_width;
  92         int jpg_std_DHT_flag;
  93         quicktime_mjpa_info mjpa_info;
  94         int marker;
  95         quicktime_mjpa_buffs yuvbufs;
  96         quicktime_mjpa_yuvtabs yuvtabs;
  97
  98 /* Marker status */
  99         int jpg_saw_SOI;
 100         int jpg_saw_SOF;
 101         int jpg_saw_SOS;
 102         int jpg_saw_EOI;
 103         int jpg_saw_DHT;
 104         int jpg_saw_DQT;
 105         int mjpg_kludge;
 106 } quicktime_jpeg_t;
 107
 108 #endif