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/* See LICENSE file for copyright and license details. */
#ifndef TYPE
#include "common.h"
USAGE("[-e]")
static int equal = 0;
#define FILE "blind-double-sine-wave.c"
#include "define-functions.h"
int
main(int argc, char *argv[])
{
struct stream stream;
void (*process)(struct stream *stream);
ARGBEGIN {
case 'e':
equal = 1;
break;
default:
usage();
} ARGEND;
if (argc)
usage();
eopen_stream(&stream, NULL);
SELECT_PROCESS_FUNCTION(&stream);
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
process(&stream);
return 0;
}
#else
static void
PROCESS(struct stream *stream)
{
size_t i, j, n;
TYPE v, *p;
do {
if (equal) {
n = stream->ptr / stream->pixel_size;
for (i = 0; i < n; i++) {
p = (TYPE *)(stream->buf) + i * stream->n_chan;
v = posmod(*p, (TYPE)2);
v = v > 1 ? 2 - v : v;
v = 1 - (sin(v * (2 * (TYPE)M_PI)) + 1) / 2;
for (j = 0; j < stream->n_chan; j++)
p[j] = v;
}
n *= stream->pixel_size;
} else {
n = stream->ptr / stream->chan_size;
for (i = 0; i < n; i++) {
p = (TYPE *)(stream->buf) + i;
v = posmod(*p, (TYPE)2);
v = v > 1 ? 2 - v : v;
*p = 1 - (sin(v * (2 * (TYPE)M_PI)) + 1) / 2;
}
n *= stream->chan_size;
}
ewriteall(STDOUT_FILENO, stream->buf, n, "<stdout>");
memmove(stream->buf, stream->buf + n, stream->ptr -= n);
} while (eread_stream(stream, SIZE_MAX));
if (stream->ptr)
eprintf("%s: incomplete frame\n", stream->file);
}
#endif
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