mirror of
https://github.com/espressif/esp-idf.git
synced 2025-11-04 00:51:42 +01:00
100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
|
/*----------------------------------------------------------------------------/
|
||
|
|
/ TJpgDec - Tiny JPEG Decompressor include file (C)ChaN, 2012
|
||
|
|
/----------------------------------------------------------------------------*/
|
||
|
|
#ifndef _TJPGDEC
|
||
|
|
#define _TJPGDEC
|
||
|
|
/*---------------------------------------------------------------------------*/
|
||
|
|
/* System Configurations */
|
||
|
|
|
||
|
|
#define JD_SZBUF 512 /* 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) */
|
||
|
|
|
||
|
|
/*---------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* These types must be 16-bit, 32-bit or larger integer */
|
||
|
|
typedef int INT;
|
||
|
|
typedef unsigned int UINT;
|
||
|
|
|
||
|
|
/* These types must be 8-bit integer */
|
||
|
|
typedef char CHAR;
|
||
|
|
typedef unsigned char UCHAR;
|
||
|
|
typedef unsigned char BYTE;
|
||
|
|
|
||
|
|
/* These types must be 16-bit integer */
|
||
|
|
typedef short SHORT;
|
||
|
|
typedef unsigned short USHORT;
|
||
|
|
typedef unsigned short WORD;
|
||
|
|
typedef unsigned short WCHAR;
|
||
|
|
|
||
|
|
/* These types must be 32-bit integer */
|
||
|
|
typedef long LONG;
|
||
|
|
typedef unsigned long ULONG;
|
||
|
|
typedef unsigned long DWORD;
|
||
|
|
|
||
|
|
|
||
|
|
/* 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 {
|
||
|
|
WORD left, right, top, bottom;
|
||
|
|
} JRECT;
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/* Decompressor object structure */
|
||
|
|
typedef struct JDEC JDEC;
|
||
|
|
struct JDEC {
|
||
|
|
UINT dctr; /* Number of bytes available in the input buffer */
|
||
|
|
BYTE* dptr; /* Current data read ptr */
|
||
|
|
BYTE* inbuf; /* Bit stream input buffer */
|
||
|
|
BYTE dmsk; /* Current bit in the current read byte */
|
||
|
|
BYTE scale; /* Output scaling ratio */
|
||
|
|
BYTE msx, msy; /* MCU size in unit of block (width, height) */
|
||
|
|
BYTE qtid[3]; /* Quantization table ID of each component */
|
||
|
|
SHORT dcv[3]; /* Previous DC element of each component */
|
||
|
|
WORD nrst; /* Restart inverval */
|
||
|
|
UINT width, height; /* Size of the input image (pixel) */
|
||
|
|
BYTE* huffbits[2][2]; /* Huffman bit distribution tables [id][dcac] */
|
||
|
|
WORD* huffcode[2][2]; /* Huffman code word tables [id][dcac] */
|
||
|
|
BYTE* huffdata[2][2]; /* Huffman decoded data tables [id][dcac] */
|
||
|
|
LONG* qttbl[4]; /* Dequaitizer tables [id] */
|
||
|
|
void* workbuf; /* Working buffer for IDCT and RGB output */
|
||
|
|
BYTE* mcubuf; /* Working buffer for the MCU */
|
||
|
|
void* pool; /* Pointer to available memory pool */
|
||
|
|
UINT sz_pool; /* Size of momory pool (bytes available) */
|
||
|
|
UINT (*infunc)(JDEC*, BYTE*, UINT);/* Pointer to jpeg stream input function */
|
||
|
|
void* device; /* Pointer to I/O device identifiler for the session */
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/* TJpgDec API functions */
|
||
|
|
JRESULT jd_prepare (JDEC*, UINT(*)(JDEC*,BYTE*,UINT), void*, UINT, void*);
|
||
|
|
JRESULT jd_decomp (JDEC*, UINT(*)(JDEC*,void*,JRECT*), BYTE);
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* _TJPGDEC */
|