Fixes for MP support for LVGL 3rd party libraries

Add missing lv_qrcode_class

Remove 'struct JDEC' from public API. This struct is needed intenally on tjpgd.c and lv_sjpg.c, but doesn't need to be exposed in the public API. When exposed, it increases Micropython binding program size and some fields are not supported today (uint8_t* huffbits[2][2]). To overcome this, moved it to a new H file which is not included in public API, only in sjpg C files

Related: lvgl/lv_binding_micropython#180

src/extra/libs/qrcode/lv_qrcode.h

@@ -20,6 +20,8 @@ extern "C" {
  *      DEFINES
  *********************/
 
+#define lv_qrcode_class lv_canvas_class
+
 /**********************
  *      TYPEDEFS
  **********************/

src/extra/libs/sjpg/lv_sjpg.c

@@ -49,6 +49,7 @@
 #if LV_USE_SJPG
 
 #include "tjpgd.h"
+#include "tjdec.h"
 #include "lv_sjpg.h"
 
 

src/extra/libs/sjpg/tjdec.h

@@ -0,0 +1,39 @@
+#ifndef DEF_TJDEC
+#define DEF_TJDEC
+
+#include "tjpgdcnf.h"
+
+struct JDEC {
+	size_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 dbit;				/* Number of bits availavble in wreg or reading bit mask */
+	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, Y, Cb, Cr */
+	uint8_t ncomp;				/* Number of color components 1:grayscale, 3:color */
+	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] */
+#if JD_FASTDECODE >= 1
+	uint32_t wreg;				/* Working shift register */
+	uint8_t marker;				/* Detected marker (0:None) */
+#if JD_FASTDECODE == 2
+	uint8_t longofs[2][2];		/* Table offset of long code [id][dcac] */
+	uint16_t* hufflut_ac[2];	/* Fast huffman decode tables for AC short code [id] */
+	uint8_t* hufflut_dc[2];		/* Fast huffman decode tables for DC short code [id] */
+#endif
+#endif
+	void* workbuf;				/* Working buffer for IDCT and RGB output */
+	jd_yuv_t* mcubuf;			/* Working buffer for the MCU */
+	void* pool;					/* Pointer to available memory pool */
+	size_t sz_pool;				/* Size of momory pool (bytes available) */
+	size_t (*infunc)(struct JDEC*, uint8_t*, size_t);	/* Pointer to jpeg stream input function */
+	void* device;				/* Pointer to I/O device identifiler for the session */
+};
+
+#endif // DEF_TJDEC

src/extra/libs/sjpg/tjpgd.c

@@ -26,6 +26,7 @@
 
 #include "tjpgd.h"
 #if LV_USE_SJPG
+#include "tjdec.h"
 
 #if JD_FASTDECODE == 2
 #define HUFF_BIT	10	/* Bit length to apply fast huffman decode */

src/extra/libs/sjpg/tjpgd.h

@@ -54,39 +54,6 @@ typedef struct {
 
 /* Decompressor object structure */
 typedef struct JDEC JDEC;
-struct JDEC {
-	size_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 dbit;				/* Number of bits availavble in wreg or reading bit mask */
-	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, Y, Cb, Cr */
-	uint8_t ncomp;				/* Number of color components 1:grayscale, 3:color */
-	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] */
-#if JD_FASTDECODE >= 1
-	uint32_t wreg;				/* Working shift register */
-	uint8_t marker;				/* Detected marker (0:None) */
-#if JD_FASTDECODE == 2
-	uint8_t longofs[2][2];		/* Table offset of long code [id][dcac] */
-	uint16_t* hufflut_ac[2];	/* Fast huffman decode tables for AC short code [id] */
-	uint8_t* hufflut_dc[2];		/* Fast huffman decode tables for DC short code [id] */
-#endif
-#endif
-	void* workbuf;				/* Working buffer for IDCT and RGB output */
-	jd_yuv_t* mcubuf;			/* Working buffer for the MCU */
-	void* pool;					/* Pointer to available memory pool */
-	size_t sz_pool;				/* Size of momory pool (bytes available) */
-	size_t (*infunc)(JDEC*, uint8_t*, size_t);	/* Pointer to jpeg stream input function */
-	void* device;				/* Pointer to I/O device identifiler for the session */
-};
-
 
 
 /* TJpgDec API functions */