tjpgdcnf.h

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/*----------------------------------------------*/
/* TJpgDec System Configurations R0.03          */
/*----------------------------------------------*/
 
#define JD_SZBUF    512
/* Specifies size of stream input buffer */
 
#define JD_FORMAT   0
/* Specifies output pixel format.
/  0: RGB888 (24-bit/pix)
/  1: RGB565 (16-bit/pix)
/  2: Grayscale (8-bit/pix)
*/
 
#define JD_USE_SCALE  1
/* Switches output descaling feature.
/  0: Disable
/  1: Enable
*/
 
#define JD_TBLCLIP    1
/* Use table conversion for saturation arithmetic. A bit faster, but increases 1 KB of code size.
/  0: Disable
/  1: Enable
*/
 
// Empirically, 2 is about 26% faster on ESP32; i.e. the extra 3 KB seem well invested.
#define JD_FASTDECODE 2
/* Optimization level
/  0: Basic optimization. Suitable for 8/16-bit MCUs.
/  1: + 32-bit barrel shifter. Suitable for 32-bit MCUs.
/  2: + Table conversion for huffman decoding (wants 6 << HUFF_BIT bytes of RAM)
*/