LIBJPEG: C library for reading and writing JPEG image files Default Value : FatFS This parameter specifies the type of data manager used for compressed data storage (source and destination) when the "stream" data management Api is used : -FatFS : FatFS File system -Stdio : standard "stdio" stream manager -None : No file system interfacing Default Value : "FatFS Ronly" This parameter specifies the type of data manager used for compressed data storage (source and destination) when the "stream" data management Api is used : -FatFS Ronly : FatFS File system - "Read Only" mode -Stdio : standard "stdio" stream manager -None : No file system interfacing Default Value : Stdio This parameter specifies the type of data manager used for compressed data storage (source and destination) when the "stream" data management Api is used : -Stdio : standard "stdio" stream manager -None : No file system interfacing This parameter indicates if FreeRtos is Disabled or Enabled : -when FreeRtos is Disabled, the LibJpeg memory allocator is the C standard allocator (not configurable). -when FreeRtos is Enabled, the LibJpeg memory allocator type can be configured in "General Settings" menu. This parameter indicates if FreeRtos is Disabled or Enabled : -when FreeRtos is Disabled, the LibJpeg memory allocator is the C standard allocator (not configurable). -when FreeRtos is Enabled, the LibJpeg memory allocator type can be configured in "General Settings" menu. FreeRtos is Enabled : this parameter allows to select FreeRtos Memory Allocator (value Enabled) or the C standard memory allocator (value Disabled) for LibJpeg memory allocations. FreeRtos is Disabled : LibJpeg memory allocator is the C standard memory allocator. Default Value : 8 bits Define BITS_IN_JSAMPLE as either: - 8 for 8-bit sample values (the usual setting) - 12 for 12-bit sample values Only 8 and 12 are legal data precisions for lossy JPEG according to the JPEG standard, and the IJG code does not support anything else. Warning: -when selecting 12 bits data precision (BITS_IN_JSAMPLE = 12), it is recommended to enable "ENTROPY_OPT_SUPPORTED" when encoder is used (cf "jmorecfg.h" for details). Default Value : 10 Define maximum number of components (color channels) allowed in JPEG image To meet the letter of the JPEG spec, set this to 255. However, darn few applications need more than 4 channels (maybe 5 for CMYK + alpha mask). We recommend 10 as a reasonable compromise; use 4 if you are really short on memory. (Each allowed component costs a hundred or so bytes of storage, whether actually used in an image or not.) Default Value : short Define representation of a DCT frequency coefficient. This should be a signed value of at least 16 bits; "short" is usually OK. Again, we allocate large arrays of these, but you can change to int if you have memory to burn and "short" is really slow. Default Value : Enabled Slow but accurate integer algorithm Default Value : Enabled Faster, less accurate integer method Default Value : Enabled Floating-point: accurate, fast on fast HW Default Value : Enabled Arithmetic coding back end Default Value : Enabled Multiple-scan JPEG files Default Value : Enabled Progressive JPEG (Requires MULTISCAN) Warnings: -"Progressive encoding" requires to enable "C_MULTISCAN_FILES_SUPPORTED" (cf "jmorecfg.h" for details) -when "Progressive encoding" is enabled, it is recommended to enable "ENTROPY_OPT_SUPPORTED" (cf "jmorecfg.h" for details) Default Value : Enabled Progressive JPEG (Requires MULTISCAN) Warnings: -"Progressive encoding" requires to enable "C_MULTISCAN_FILES_SUPPORTED" (cf "jmorecfg.h" for details) -when "Progressive encoding" is enabled, it is recommended to enable "ENTROPY_OPT_SUPPORTED" (cf "jmorecfg.h" for details) Default Value : Enabled Input rescaling via DCT (Requires DCT_ISLOW) Warning: "DCT scaling" requires to enable "DCT_ISLOW_SUPPORTED" (cf "jmorecfg.h" for details). Default Value : Enabled Input rescaling via DCT (Requires DCT_ISLOW) Warning: "DCT scaling" requires to enable "DCT_ISLOW_SUPPORTED" (cf "jmorecfg.h" for details). Default Value : Enabled Optimization of entropy coding parms Warning: -when "ENTROPY_OPT_SUPPORTED" is disabled it is recommended to set data precision to 8-bit (BITS_IN_JSAMPLE = 8) and to disable "C_PROGRESSIVE_SUPPORTED" - (cf "jmorecfg.h" for details). Default Value : Enabled Input image smoothing option Default Value : Enabled Arithmetic coding back end Default Value : Enabled Multiple-scan JPEG files Default Value : Enabled Progressive JPEG (Requires MULTISCAN) Warning: -"Progressive decoding" requires to enable "D_MULTISCAN_FILES_SUPPORTED" (cf "jmorecfg.h" for details). Default Value : Enabled Progressive JPEG (Requires MULTISCAN) Warning: -"Progressive decoding" requires to enable "D_MULTISCAN_FILES_SUPPORTED" (cf "jmorecfg.h" for details). Default Value : Enabled Output rescaling via IDCT Default Value : Enabled jpeg_save_markers() needed Default Value : Enabled Block smoothing (Progressive only) Warning: -"Block smoothing" requires to enable "D_PROGRESSIVE_SUPPORTED" (cf "jmorecfg.h" for details). Default Value : Enabled Block smoothing (Progressive only) Warning: -"Block smoothing" requires to enable "D_PROGRESSIVE_SUPPORTED" (cf "jmorecfg.h" for details). Default Value : Disabled Output rescaling at upsample stage Default Value : Enabled Fast path for sloppy upsampling Default Value : Enabled 1-pass color quantization Default Value : Enabled 2-pass color quantization Default Value : RGB Ordering of RGB data in scanlines passed to or from the application Only R/G/B and B/G/R orders are possible Refer to "LibJPEG/jquant2.c" for details Default Value : 3 JSAMPLEs per RGB scanline element. To deal with formats such as R,G,B,X one extra byte per pixel) by changing RGB_PIXELSIZE. Note that changing the offsets will also change the order in which colormap data is organized. RESTRICTIONS: 1. The sample applications cjpeg,djpeg do NOT support modified RGB formats. 2. The color quantizer modules will not behave desirably if RGB_PIXELSIZE is not 3 (they don't understand about dummy color components!). So you can't use color quantization if you change that value. LIBJPEG_ENABLE_Init S_LIBJPEG