acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
jpg_to_sjpg.py (3556B)
      1 ##################################################################
      2 # sjpeg converter script version 1.0
      3 # Dependencies: (PYTHON-3)
      4 ##################################################################
      5 SJPG_FILE_FORMAT_VERSION = "V1.00"  #
      6 JPEG_SPLIT_HEIGHT   = 16
      7 ##################################################################
      8 import math, os, sys, time
      9 from PIL import Image
     10 
     11 
     12 OUTPUT_FILE_NAME = ""
     13 INPUT_FILE       = ""
     14 
     15 
     16 if len(sys.argv) == 2:
     17     INPUT_FILE = sys.argv[1]
     18     OUTPUT_FILE_NAME = INPUT_FILE.split("/")[-1].split("\\")[-1].split(".")[0]
     19 else:
     20     print("usage:\n\t python " + sys.argv[0] + " input_file.jpg")
     21     sys.exit(0)
     22 
     23 try:
     24     im = Image.open(INPUT_FILE)
     25 except:
     26     print("\nFile not found!")
     27     sys.exit(0)
     28 
     29 
     30 print("\nConversion started...\n")
     31 start_time = time.time()
     32 width, height = im.size
     33 
     34 print("Input:")
     35 print("\t" + INPUT_FILE)
     36 print("\tRES = " + str(width) + " x " + str(height) + '\n')
     37 
     38 
     39 lenbuf = []
     40 block_size = JPEG_SPLIT_HEIGHT;
     41 spilts = math.ceil(height/block_size)
     42 
     43 c_code = '''//LVGL SJPG C ARRAY\n#include "lvgl/lvgl.h"\n\nconst uint8_t ''' + OUTPUT_FILE_NAME + '''_map[] = {\n'''
     44 
     45 sjpeg_data = bytearray()
     46 sjpeg = bytearray()
     47 
     48 
     49 row_remaining = height;
     50 for i in range(spilts):
     51     if row_remaining < block_size:
     52         crop = im.crop((0, i*block_size, width, row_remaining + i*block_size))
     53     else:
     54         crop = im.crop((0, i*block_size, width, block_size + i*block_size))
     55 
     56     row_remaining = row_remaining - block_size;
     57     crop.save(str(i)+".jpg", quality=90)
     58 
     59 
     60 
     61 
     62 for i in range(spilts):
     63     f = open(str(i)+".jpg", "rb")
     64     a = f.read()
     65     f.close()
     66     sjpeg_data = sjpeg_data + a
     67     lenbuf.append(len(a))
     68 
     69 header = bytearray()
     70 
     71 #4 BYTES
     72 header = header + bytearray("_SJPG__".encode("UTF-8"));
     73 
     74 #6 BYTES VERSION
     75 header = header + bytearray(("\x00" + SJPG_FILE_FORMAT_VERSION + "\x00").encode("UTF-8"));
     76 
     77 #WIDTH 2 BYTES
     78 header = header + width.to_bytes(2, byteorder='little');
     79 
     80 #HEIGHT 2 BYTES
     81 header = header + height.to_bytes(2, byteorder='little');
     82 
     83 #NUMBER OF ITEMS 2 BYTES
     84 header = header + spilts.to_bytes(2, byteorder='little');
     85 
     86 #NUMBER OF ITEMS 2 BYTES
     87 header = header + int(JPEG_SPLIT_HEIGHT).to_bytes(2, byteorder='little');
     88 
     89 for item_len in lenbuf:
     90     # WIDTH 2 BYTES
     91     header = header + item_len.to_bytes(2, byteorder='little');
     92 
     93 
     94 data = bytearray()
     95 
     96 sjpeg = header + sjpeg_data;
     97 
     98 if 1:
     99     for i in range(len(lenbuf)):
    100         os.remove(str(i) + ".jpg")
    101 
    102 
    103 f = open(OUTPUT_FILE_NAME+".sjpg","wb");
    104 f.write(sjpeg)
    105 f.close()
    106 
    107 new_line_threshold = 0
    108 for i in range(len(sjpeg)):
    109     c_code = c_code + "\t" + str(hex(sjpeg[i])) + ","
    110     new_line_threshold = new_line_threshold + 1
    111     if (new_line_threshold >= 16):
    112         c_code = c_code + "\n"
    113         new_line_threshold = 0
    114 
    115 
    116 c_code = c_code + "\n};\n\nlv_img_dsc_t "
    117 c_code = c_code + OUTPUT_FILE_NAME + " = {\n"
    118 c_code = c_code + "\t.header.always_zero = 0,\n"
    119 c_code = c_code + "\t.header.w = " + str(width) + ",\n"
    120 c_code = c_code + "\t.header.h = " + str(height) + ",\n"
    121 c_code = c_code + "\t.data_size = " + str(len(sjpeg)) + ",\n"
    122 c_code = c_code + "\t.header.cf = LV_IMG_CF_RAW,\n"
    123 c_code = c_code + "\t.data = " + OUTPUT_FILE_NAME+"_map" + ",\n};"
    124 
    125 
    126 f = open(OUTPUT_FILE_NAME + '.c', 'w')
    127 f.write(c_code)
    128 f.close()
    129 
    130 
    131 time_taken = (time.time() - start_time)
    132 
    133 print("Output:")
    134 print("\tTime taken = " + str(round(time_taken,2)) + " sec")
    135 print("\tbin size = " + str(round(len(sjpeg)/1024, 1)) + " KB" )
    136 print("\t" + OUTPUT_FILE_NAME + ".sjpg\t(bin file)" + "\n\t" + OUTPUT_FILE_NAME + ".c\t\t(c array)")
    137 
    138 print("\nAll good!")