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/* See LICENSE file for copyright and license details. */
#include "common.h"
USAGE("[-g | -h | -l power | -p power]")
/* TODO add -w weight-stream */
/* Because the syntax for a function returning a function pointer is disgusting. */
typedef void (*process_func)(struct stream *stream, void *buffer, void *image, size_t frame);
/*
* X-parameter 1: method enum value
* X-parameter 2: identifier-friendly name
* X-parameter 3: images
* X-parameter 4: action for first frame
* X-parameter 5: pre-process assignments
* X-parameter 6: subcell processing
* X-parameter 7: pre-finalise assignments
* X-parameter 8: subcell finalisation
*/
#define LIST_MEANS(TYPE)\
/* [default] arithmetic mean */\
X(ARITHMETIC, arithmetic, 1, COPY_FRAME,, *img1 += *buf,\
a = (TYPE)1.0 / (TYPE)frame, *img1 *= a)\
/* geometric mean */\
X(GEOMETRIC, geometric, 1, COPY_FRAME,, *img1 *= *buf,\
a = (TYPE)1.0 / (TYPE)frame, *img1 = nnpow(*img1, a))\
/* harmonic mean */\
X(HARMONIC, harmonic, 1, ZERO_AND_PROCESS_FRAME,, *img1 += (TYPE)1 / *buf,\
a = (TYPE)frame, *img1 = a / *img1)\
/* lehmer mean */\
X(LEHMER, lehmer, 2, ZERO_AND_PROCESS_FRAME, (a = (TYPE)power, b = a - (TYPE)1),\
(*img1 += nnpow(*buf, a), *img2 += nnpow(*buf, b)),, *img1 /= *img2)\
/* power mean (Hölder mean) (m = 2 for root square mean; m = 3 for cubic mean) */\
X(POWER, power, 1, ZERO_AND_PROCESS_FRAME, a = (TYPE)power,\
*img1 += nnpow(*buf, a), (a = (TYPE)1 / (TYPE)frame, b = (TYPE)(1.0 / power)),\
*img1 = a * nnpow(*img1, b))
enum first_frame_action {
COPY_FRAME,
PROCESS_FRAME,
ZERO_AND_PROCESS_FRAME,
};
#define X(V, ...) V,
enum method { LIST_MEANS() };
#undef X
static double power;
#define MAKE_PROCESS(PIXFMT, TYPE,\
_1, NAME, _3, _4, PRE_PROCESS, PROCESS_SUBCELL, PRE_FINALISE, FINALISE_SUBCELL)\
static void\
process_##PIXFMT##_##NAME(struct stream *stream, void *buffer, void *image, size_t frame)\
{\
TYPE *buf = buffer, *img1 = image, a, b;\
TYPE *img2 = (TYPE *)(((char *)image) + stream->frame_size);\
size_t x, y;\
if (!stream) {\
PRE_FINALISE;\
for (y = 0; y < stream->height; y++)\
for (x = 0; x < stream->width; x++, img1++, img2++, buf++)\
FINALISE_SUBCELL;\
} else {\
PRE_PROCESS;\
for (y = 0; y < stream->height; y++)\
for (x = 0; x < stream->width; x++, img1++, img2++, buf++)\
PROCESS_SUBCELL;\
}\
(void) img2, (void) a, (void) b, (void) frame;\
}
#define X(...) MAKE_PROCESS(xyza, double, __VA_ARGS__)
LIST_MEANS(double)
#undef X
#define X(...) MAKE_PROCESS(xyzaf, float, __VA_ARGS__)
LIST_MEANS(float)
#undef X
#undef MAKE_PROCESS
#define X(ID, NAME, ...) [ID] = process_xyza_##NAME,
static const process_func process_functions_xyza[] = { LIST_MEANS() };
#undef X
#define X(ID, NAME, ...) [ID] = process_xyzaf_##NAME,
static const process_func process_functions_xyzaf[] = { LIST_MEANS() };
#undef X
int
main(int argc, char *argv[])
{
struct stream stream;
void *buf, *img;
process_func process;
size_t frames, images;
enum method method = ARITHMETIC;
enum first_frame_action first_frame_action;
ARGBEGIN {
case 'g':
method = GEOMETRIC;
break;
case 'h':
method = HARMONIC;
break;
case 'l':
method = LEHMER;
power = etolf_flag('l', UARGF());
break;
case 'p':
method = POWER;
power = etolf_flag('p', UARGF());
break;
default:
usage();
} ARGEND;
if (argc)
usage();
#define X(ID, _2, IMAGES, FIRST_FRAME_ACTION, ...)\
case ID:\
images = IMAGES;\
first_frame_action = FIRST_FRAME_ACTION;\
break;
switch (method) {
LIST_MEANS()
default:
abort();
}
#undef X
eopen_stream(&stream, NULL);
if (!strcmp(stream.pixfmt, "xyza"))
process = process_functions_xyza[method];
else if (!strcmp(stream.pixfmt, "xyza f"))
process = process_functions_xyzaf[method];
else
eprintf("pixel format %s is not supported, try xyza\n", stream.pixfmt);
stream.frames = 1;
echeck_dimensions(&stream, WIDTH | HEIGHT, NULL);
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
buf = emalloc(stream.frame_size);
if (first_frame_action == ZERO_AND_PROCESS_FRAME)
img = ecalloc(images, stream.frame_size);
else
img = emalloc2(images, stream.frame_size);
frames = 0;
if (first_frame_action == COPY_FRAME) {
if (!eread_frame(&stream, buf))
eprintf("video is no frames\n");
frames++;
}
for (; eread_frame(&stream, buf); frames++)
process(&stream, buf, img, frames);
if (!frames)
eprintf("video is no frames\n");
process(&stream, NULL, img, frames);
ewriteall(STDOUT_FILENO, img, stream.frame_size, "<stdout>");
free(buf);
free(img);
return 0;
}
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