Add files via upload

Compress.py

@@ -0,0 +1,147 @@
+from PIL import Image
+
+def get_compressed(filename):
+    # Convert to gray and then to 1 bit using custom threshold
+    im = Image.open(filename).convert(mode="L").point(lambda i: i > 127 and 255)
+
+    imdata = list(im.getdata())
+
+    imbit = []
+    b_count = 0
+    c8 = 0
+    for c in imdata[:]:
+        c8 = c8 << 1
+        if c != 0:
+            c8 = c8 | 1
+        b_count += 1
+        if b_count == 8:
+            b_count = 0
+            imbit.append(c8)
+            c8 = 0
+
+
+    # ENCODE
+    im_comp = []
+    c_m1 = imbit[0]
+    runlength = 0
+    # run-length encode only bytes 0 and 255
+    # use 0x55 as escape sequence for 0 and 0xaa for 255
+    # afterwards the run-length is encoded into 1 or 2 bytes
+    # for run-lengths of 1..127 1 byte is used, for run-lengths
+    # above the highest bit is set to 1 and the MSB is added
+    # to the second byte.
+    # run length of 0 is used to replace escape character
+    for c in imbit[1:]:
+        if runlength == 0:
+            if c_m1 in [0, 255]:
+                if c_m1 == c:
+                    runlength = 2
+                else:
+                    im_comp.append(c_m1)
+            else:
+                # encode directly
+                im_comp.append(c_m1)
+                if c_m1 in [0x55, 0xaa]:
+                    im_comp.append(0)
+        else:
+            if c_m1 == c:
+                runlength += 1
+            else:
+                if runlength == 2:
+                    im_comp.append(c_m1)
+                    im_comp.append(c_m1)
+                else:
+                    if c_m1 == 0:
+                        im_comp.append(0x55)
+                    else:
+                        im_comp.append(0xaa)
+                    if runlength <= 127:
+                        im_comp.append(runlength)
+                    else:
+                        im_comp.append((runlength & 0x7f) | 128)
+                        im_comp.append(runlength >> 7)
+                runlength = 0
+        c_m1 = c
+
+    if runlength == 0:
+        im_comp.append(c_m1)
+    else:
+        if runlength == 2:
+            im_comp.append(c_m1)
+            im_comp.append(c_m1)
+        else:
+            if c_m1 == 0:
+                im_comp.append(0x55)
+            else:
+                im_comp.append(0xaa)
+            if runlength <= 127:
+                im_comp.append(runlength)
+            else:
+                im_comp.append((runlength & 0x7f) | 128)
+                im_comp.append(runlength >> 7)
+        runlength = 0
+
+    # DECODE
+    im_decomp = []
+    runlength = -1
+    c_to_dup = -1
+    for c in im_comp[:]:
+        if c_to_dup == -1:
+            if c in [0x55, 0xaa]:
+                c_to_dup = c
+            else:
+                im_decomp.append(c)
+        else:
+            if runlength == -1:
+                if c == 0:
+                    im_decomp.append(c_to_dup)
+                    c_to_dup = -1
+                elif (c & 0x80) == 0:
+                    if c_to_dup == 0x55:
+                        im_decomp.extend([0] * c)
+                    else:
+                        im_decomp.extend([255] * c)
+                    c_to_dup = -1
+                else:
+                    runlength = c & 0x7f
+            else:
+                runlength = runlength | (c << 7)
+                if c_to_dup == 0x55:
+                    im_decomp.extend([0] * runlength)
+                else:
+                    im_decomp.extend([255] * runlength)
+                c_to_dup = -1
+                runlength = -1
+
+    if len(imbit) != len(im_decomp):
+        print("Decomp len fail!")
+    else:
+        for a, b in zip(imbit, im_decomp):
+            if (b < 0) or (b > 255):
+                print("Range to big")
+            if a != b:
+                print("Decomp fail")
+                break
+    return im_comp, imbit
+
+sumlen = 0
+movie = []
+output_file = open("E:\\Proggen\\BA\\video.bin","wb")
+output_file_uc = open("E:\\Proggen\\BA\\video.uc","wb")
+# 6573 5470/2
+for nr in range(1, int(6574)):
+    fn = "E:\Proggen\BA\scene" + "{0:0>5}".format(nr) + ".png"
+    comp_dat, uncomp = get_compressed(fn)
+    output_file.write(bytearray(comp_dat))
+    output_file_uc.write(bytearray(uncomp))
+    # movie.extend(comp_dat)
+    sumlen += len(comp_dat)
+
+output_file.close()
+output_file_uc.close()
+#movie_dat = bytearray(movie)
+#print(len(movie_dat))
+
+print(sumlen)
+print("Done")
+#im.show()