BurstSPI support for improved performance
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Diff: GraphicsDisplayJPEG.h
- Revision:
- 115:c9862fd0c689
- Child:
- 125:7a0b70f56550
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/GraphicsDisplayJPEG.h Mon May 16 02:05:37 2016 +0000 @@ -0,0 +1,75 @@ +/// Wrapping ChaN's TJpgDec into this graphics engine +/// + +#ifndef GraphicsDisplayJPEG_H +#define GraphicsDisplayJPEG_H + +/*----------------------------------------------------------------------------/ +/ 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 1 /* 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) */ + +/*---------------------------------------------------------------------------*/ + +#include "DisplayDefs.h" + +/* Error code */ +typedef enum { + JDR_OK = noerror, /* 0: Succeeded */ + JDR_INTR = external_abort, /* 1: Interrupted by output function */ + JDR_INP = bad_parameter, /* 2: Device error or wrong termination of input stream */ + JDR_MEM1 = not_enough_ram, /* 3: Insufficient memory pool for the image */ + JDR_MEM2 = not_enough_ram, /* 4: Insufficient stream input buffer */ + JDR_PAR = bad_parameter, /* 5: Parameter error */ + JDR_FMT1 = not_supported_format, /* 6: Data format error (may be damaged data) */ + JDR_FMT2 = not_supported_format, /* 7: Right format but not supported */ + JDR_FMT3 = not_supported_format /* 8: Not supported JPEG standard */ +} JRESULT; + + + +/* Rectangular structure */ +typedef struct { + loc_t left, right, top, bottom; +} JRECT; + + + +/* Decompressor object structure */ +typedef struct JDEC JDEC; +struct JDEC { + 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]; /* Dequaitizer tables [id] */ + void * workbuf; /* Working buffer for IDCT and RGB output */ + uint8_t * mcubuf; /* Working buffer for the MCU */ + void * pool; /* Pointer to available memory pool */ + uint16_t sz_pool; /* Size of momory pool (bytes available) */ + uint16_t (*infunc)(JDEC * jd, uint8_t * buffer, uint16_t bufsize);/* Pointer to jpeg stream input function */ + void * device; /* Pointer to I/O device identifiler for the session */ +}; + + +#endif /* _TJPGDEC */ + +#endif // GraphicsDisplayJPEG_H