blind-transition.c (2753B)
1 /* See LICENSE file for copyright and license details. */ 2 #include "common.h" 3 4 USAGE("[-ir] [-s softness-stream]") 5 6 static size_t fm; 7 static double fm_double; 8 static float fm_float; 9 static int reverse = 0; 10 static int invert = 0; 11 static const char *softness_file = NULL; 12 static struct stream softness; 13 14 #define PROCESS(TYPE)\ 15 do {\ 16 size_t i, j = 0;\ 17 TYPE a, s, t = fm ? (TYPE)(reverse ? fm - f : f) / fm_##TYPE : (TYPE)0.5;\ 18 if (!softness_file) {\ 19 for (i = 0; i < n; i += stream->pixel_size) {\ 20 a = ((TYPE *)(stream->buf + i))[1];\ 21 if (invert)\ 22 a = (TYPE)1 - a;\ 23 a = (TYPE)(a >= t);\ 24 ((TYPE *)(stream->buf + i))[0] = a * (TYPE)D65_XYZ_X;\ 25 ((TYPE *)(stream->buf + i))[1] = a;\ 26 ((TYPE *)(stream->buf + i))[2] = a * (TYPE)D65_XYZ_Z;\ 27 ((TYPE *)(stream->buf + i))[3] = 1;\ 28 }\ 29 } else {\ 30 for (i = 0; i < n; i += stream->pixel_size, j += softness.pixel_size) {\ 31 while (j + softness.pixel_size > softness.ptr) {\ 32 memmove(softness.buf, softness.buf + j, softness.ptr -= j);\ 33 j = 0;\ 34 if (!eread_stream(&softness, SIZE_MAX))\ 35 return;\ 36 }\ 37 s = ((TYPE *)(softness.buf + j))[1];\ 38 s *= ((TYPE *)(softness.buf + j))[3];\ 39 a = ((TYPE *)(stream->buf + i))[1];\ 40 if (invert)\ 41 a = (TYPE)1 - a;\ 42 a = (a / (1 + 2 * s) + s - t) / s;\ 43 a = a < 0 ? (TYPE)0 : a > 1 ? (TYPE)1 : a;\ 44 ((TYPE *)(stream->buf + i))[0] = a * (TYPE)D65_XYZ_X;\ 45 ((TYPE *)(stream->buf + i))[1] = a;\ 46 ((TYPE *)(stream->buf + i))[2] = a * (TYPE)D65_XYZ_Z;\ 47 ((TYPE *)(stream->buf + i))[3] = 1;\ 48 }\ 49 }\ 50 } while (0) 51 52 static void process_lf(struct stream *stream, size_t n, size_t f) {PROCESS(double);} 53 static void process_f (struct stream *stream, size_t n, size_t f) {PROCESS(float);} 54 55 int 56 main(int argc, char *argv[]) 57 { 58 struct stream stream; 59 void (*process)(struct stream *stream, size_t n, size_t f); 60 61 ARGBEGIN { 62 case 'i': 63 invert = 1; 64 break; 65 case 'r': 66 reverse = 1; 67 break; 68 case 's': 69 softness_file = UARGF(); 70 break; 71 default: 72 usage(); 73 } ARGEND; 74 75 if (argc) 76 usage(); 77 78 eopen_stream(&stream, NULL); 79 if (softness_file) { 80 eopen_stream(&softness, softness_file); 81 echeck_compat(&stream, &softness); 82 } 83 84 CHECK_ALPHA(&stream); 85 CHECK_COLOUR_SPACE(&stream, CIEXYZ); 86 if (stream.encoding == DOUBLE) 87 process = process_lf; 88 else if (stream.encoding == FLOAT) 89 process = process_f; 90 else 91 eprintf("pixel format %s is not supported, try xyza\n", stream.pixfmt); 92 93 if (!stream.frames) 94 eprintf("video's length is not recorded"); 95 96 fprint_stream_head(stdout, &stream); 97 efflush(stdout, "<stdout>"); 98 fm_double = (double)(fm = stream.frames - 1); 99 fm_float = (float)fm_double; 100 process_each_frame_segmented(&stream, STDOUT_FILENO, "<stdout>", process); 101 return 0; 102 }