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/* See LICENSE file for copyright and license details. */
#include "common.h"
USAGE("[-e]")
static int equal = 0;
#define PROCESS(TYPE, SUFFIX)\
static void\
process_##SUFFIX(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);\
}
PROCESS(double, lf)
PROCESS(float, f)
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);
if (stream.encoding == DOUBLE)
process = process_lf;
else if (stream.encoding == FLOAT)
process = process_f;
else
eprintf("pixel format %s is not supported, try xyza\n", stream.pixfmt);
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
process(&stream);
return 0;
}
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