blob: f00bc1038bcad73ec72a17fa6a1721b57a5ff0c8
| 1 | /*******************************************************************************# |
| 2 | # guvcview http://guvcview.sourceforge.net # |
| 3 | # # |
| 4 | # Paulo Assis <pj.assis@gmail.com> # |
| 5 | # # |
| 6 | # This program is free software; you can redistribute it and/or modify # |
| 7 | # it under the terms of the GNU General Public License as published by # |
| 8 | # the Free Software Foundation; either version 2 of the License, or # |
| 9 | # (at your option) any later version. # |
| 10 | # # |
| 11 | # This program is distributed in the hope that it will be useful, # |
| 12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of # |
| 13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # |
| 14 | # GNU General Public License for more details. # |
| 15 | # # |
| 16 | # You should have received a copy of the GNU General Public License # |
| 17 | # along with this program; if not, write to the Free Software # |
| 18 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # |
| 19 | # # |
| 20 | ********************************************************************************/ |
| 21 | |
| 22 | /*******************************************************************************# |
| 23 | # # |
| 24 | # MJpeg decoding and frame capture taken from luvcview # |
| 25 | # # |
| 26 | # # |
| 27 | ********************************************************************************/ |
| 28 | |
| 29 | #ifndef UTILS_H |
| 30 | #define UTILS_H |
| 31 | |
| 32 | #include "defs.h" |
| 33 | |
| 34 | /*video defs*/ |
| 35 | //#define BI_RGB 0; |
| 36 | //#define BI_RLE4 1; |
| 37 | //#define BI_RLE8 2; |
| 38 | //#define BI_BITFIELDS 3; |
| 39 | |
| 40 | /* Fixed point arithmetic */ |
| 41 | //#define FIXED Sint32 |
| 42 | //#define FIXED_BITS 16 |
| 43 | //#define TO_FIXED(X) (((Sint32)(X))<<(FIXED_BITS)) |
| 44 | //#define FROM_FIXED(X) (((Sint32)(X))>>(FIXED_BITS)) |
| 45 | |
| 46 | #define ISHIFT 11 |
| 47 | |
| 48 | #define IFIX(a) ((int)((a) * (1 << ISHIFT) + .5)) |
| 49 | |
| 50 | #ifndef __P |
| 51 | # define __P(x) x |
| 52 | #endif |
| 53 | |
| 54 | /* special markers */ |
| 55 | #define M_BADHUFF -1 |
| 56 | #define M_EOF 0x80 |
| 57 | |
| 58 | struct jpeg_decdata |
| 59 | { |
| 60 | int dcts[6 * 64 + 16]; |
| 61 | int out[64 * 6]; |
| 62 | int dquant[3][64]; |
| 63 | }; |
| 64 | |
| 65 | struct in |
| 66 | { |
| 67 | BYTE *p; |
| 68 | DWORD bits; |
| 69 | int left; |
| 70 | int marker; |
| 71 | int (*func) __P((void *)); |
| 72 | void *data; |
| 73 | }; |
| 74 | |
| 75 | /*********************************/ |
| 76 | #define DECBITS 10 /* seems to be the optimum */ |
| 77 | |
| 78 | struct dec_hufftbl |
| 79 | { |
| 80 | int maxcode[17]; |
| 81 | int valptr[16]; |
| 82 | BYTE vals[256]; |
| 83 | DWORD llvals[1 << DECBITS]; |
| 84 | }; |
| 85 | |
| 86 | //struct enc_hufftbl; |
| 87 | |
| 88 | union hufftblp |
| 89 | { |
| 90 | struct dec_hufftbl *dhuff; |
| 91 | //struct enc_hufftbl *ehuff; |
| 92 | }; |
| 93 | |
| 94 | struct scan |
| 95 | { |
| 96 | int dc; /* old dc value */ |
| 97 | |
| 98 | union hufftblp hudc; |
| 99 | union hufftblp huac; |
| 100 | int next; /* when to switch to next scan */ |
| 101 | |
| 102 | int cid; /* component id */ |
| 103 | int hv; /* horiz/vert, copied from comp */ |
| 104 | int tq; /* quant tbl, copied from comp */ |
| 105 | }; |
| 106 | |
| 107 | /******** Markers *********/ |
| 108 | #ifndef M_SOI |
| 109 | #define M_SOI 0xd8 |
| 110 | #define M_APP0 0xe0 |
| 111 | #define M_DQT 0xdb |
| 112 | #define M_SOF0 0xc0 |
| 113 | #define M_DHT 0xc4 |
| 114 | #define M_DRI 0xdd |
| 115 | #define M_SOS 0xda |
| 116 | #define M_RST0 0xd0 |
| 117 | #define M_EOI 0xd9 |
| 118 | #define M_COM 0xfe |
| 119 | #endif |
| 120 | |
| 121 | /*******Error codes *******/ |
| 122 | #define ERR_NO_SOI 1 |
| 123 | #define ERR_NOT_8BIT 2 |
| 124 | #define ERR_HEIGHT_MISMATCH 3 |
| 125 | #define ERR_WIDTH_MISMATCH 4 |
| 126 | #define ERR_BAD_WIDTH_OR_HEIGHT 5 |
| 127 | #define ERR_TOO_MANY_COMPPS 6 |
| 128 | #define ERR_ILLEGAL_HV 7 |
| 129 | #define ERR_QUANT_TABLE_SELECTOR 8 |
| 130 | #define ERR_NOT_YCBCR_221111 9 |
| 131 | #define ERR_UNKNOWN_CID_IN_SCAN 10 |
| 132 | #define ERR_NOT_SEQUENTIAL_DCT 11 |
| 133 | #define ERR_WRONG_MARKER 12 |
| 134 | #define ERR_NO_EOI 13 |
| 135 | #define ERR_BAD_TABLES 14 |
| 136 | #define ERR_DEPTH_MISMATCH 15 |
| 137 | #define ERR_NOT_SUPPORTED 16 |
| 138 | |
| 139 | typedef struct addr_s |
| 140 | { |
| 141 | unsigned char *y; |
| 142 | unsigned char *v; |
| 143 | unsigned char *u; |
| 144 | }addr; |
| 145 | |
| 146 | int jpeg_decode(unsigned char **pic, unsigned char *buf, int width, int height,unsigned int outformat); |
| 147 | |
| 148 | #endif |
| 149 | |
| 150 |