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