blind-dissolve.c - blind - suckless command-line video editing utility | |
git clone git://git.suckless.org/blind | |
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blind-dissolve.c (1255B) | |
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1 /* See LICENSE file for copyright and license details. */ | |
2 #include "common.h" | |
3 | |
4 USAGE("[-r]") | |
5 | |
6 static size_t fm; | |
7 static double fm_double; | |
8 static float fm_float; | |
9 static int reverse = 0; | |
10 | |
11 #define PROCESS(TYPE)\ | |
12 do {\ | |
13 size_t i = (size_t)(stream->alpha_chan) * stream->chan_s… | |
14 TYPE a = fm ? (TYPE)(reverse ? f : fm - f) / fm_##TYPE :… | |
15 for (; i < n; i += stream->pixel_size)\ | |
16 *(TYPE *)(stream->buf + i) *= a;\ | |
17 } while (0) | |
18 | |
19 static void process_lf(struct stream *stream, size_t n, size_t f) {PROCE… | |
20 static void process_f (struct stream *stream, size_t n, size_t f) {PROCE… | |
21 | |
22 int | |
23 main(int argc, char *argv[]) | |
24 { | |
25 struct stream stream; | |
26 void (*process)(struct stream *stream, size_t n, size_t f); | |
27 | |
28 ARGBEGIN { | |
29 case 'r': | |
30 reverse = 1; | |
31 break; | |
32 default: | |
33 usage(); | |
34 } ARGEND; | |
35 | |
36 if (argc) | |
37 usage(); | |
38 | |
39 eopen_stream(&stream, NULL); | |
40 | |
41 SELECT_PROCESS_FUNCTION(&stream); | |
42 CHECK_CHANS(&stream, != -1, == stream.luma_chan); | |
43 | |
44 if (!stream.frames) | |
45 eprintf("video's length is not recorded"); | |
46 | |
47 fprint_stream_head(stdout, &stream); | |
48 efflush(stdout, "<stdout>"); | |
49 fm_double = (double)(fm = stream.frames - 1); | |
50 fm_float = (float)fm_double; | |
51 process_each_frame_segmented(&stream, STDOUT_FILENO, "<stdout>",… | |
52 return 0; | |
53 } |