-
Notifications
You must be signed in to change notification settings - Fork 2
/
Copy pathtjpgdClass.h
81 lines (68 loc) · 3.28 KB
/
tjpgdClass.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
/*----------------------------------------------------------------------------/
/ TJpgDec - Tiny JPEG Decompressor include file (C)ChaN, 2019
/-----------------------------------------------------------------------------/
/ modify by lovyan03
/ May 29, 2019 Tweak for ArduinoESP32
/----------------------------------------------------------------------------*/
#ifndef _TJPGDEC_H_
#define _TJPGDEC_H_
/*---------------------------------------------------------------------------*/
/* System Configurations */
#define TJPGD_SZBUF 1426 /* Size of stream input buffer */
#define JD_FORMAT 0 /* Output pixel format 0:RGB888 (3 BYTE/pix), 1:RGB565 (1 WORD/pix) */
#define JD_USE_SCALE 1 /* Use descaling feature for output */
#define JD_TBLCLIP 1 /* Use table for saturation (might be a bit faster but increases 1K bytes of code size) */
/*---------------------------------------------------------------------------*/
#if defined(_WIN32) /* Main development platform */
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef short int16_t;
typedef unsigned long uint32_t;
typedef long int32_t;
#else
#include "stdint.h"
#endif
/* Error code */
typedef enum {
JDR_OK = 0, /* 0: Succeeded */
JDR_INTR, /* 1: Interrupted by output function */
JDR_INP, /* 2: Device error or wrong termination of input stream */
JDR_MEM1, /* 3: Insufficient memory pool for the image */
JDR_MEM2, /* 4: Insufficient stream input buffer */
JDR_PAR, /* 5: Parameter error */
JDR_FMT1, /* 6: Data format error (may be damaged data) */
JDR_FMT2, /* 7: Right format but not supported */
JDR_FMT3 /* 8: Not supported JPEG standard */
} JRESULT;
/* Rectangular structure */
typedef struct {
uint16_t left, right, top, bottom;
} JRECT;
/* Decompressor object structure */
typedef struct TJpgD TJpgD;
struct TJpgD {
uint16_t dctr; /* Number of bytes available in the input buffer */
uint8_t* dptr; /* Current data read ptr */
uint8_t* inbuf; /* Bit stream input buffer */
uint8_t dmsk; /* Current bit in the current read byte */
uint8_t scale; /* Output scaling ratio */
uint8_t msx, msy; /* MCU size in unit of block (width, height) */
uint8_t qtid[3]; /* Quantization table ID of each component */
int16_t dcv[3]; /* Previous DC element of each component */
uint16_t nrst; /* Restart inverval */
uint16_t width, height; /* Size of the input image (pixel) */
uint8_t* huffbits[2][2]; /* Huffman bit distribution tables [id][dcac] */
uint16_t* huffcode[2][2]; /* Huffman code word tables [id][dcac] */
uint8_t* huffdata[2][2]; /* Huffman decoded data tables [id][dcac] */
int32_t* qttbl[4]; /* Dequantizer tables [id] */
void* pool; /* Pointer to available memory pool */
uint16_t sz_pool; /* Size of momory pool (bytes available) */
uint16_t (*infunc)(TJpgD*, uint8_t*, uint16_t);/* Pointer to jpeg stream input function */
void* device; /* Pointer to I/O device identifiler for the session */
JRESULT prepare (uint16_t(*)(TJpgD*,uint8_t*,uint16_t), void*);
JRESULT decomp (uint16_t(*)(TJpgD*,void*,JRECT*), uint16_t(*)(TJpgD*,uint16_t,uint8_t) = 0, uint8_t = 0);
JRESULT decomp_multitask (uint16_t(*)(TJpgD*,void*,JRECT*), uint16_t(*)(TJpgD*,uint16_t,uint8_t) = 0, uint8_t = 0);
static void multitask_begin ();
static void multitask_end ();
};
#endif /* _TJPGDEC */