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/* See LICENSE file for copyright and license details. */
#include "common.h"
USAGE("[-axyz] operation right-hand-stream ...")
static int skip_ch[4] = {0, 0, 0, 0};
/* Because the syntax for a function returning a function pointer is disgusting. */
typedef void (*process_func)(struct stream *streams, size_t n_streams, size_t n);
#define LIST_OPERATORS(PIXFMT, TYPE)\
X(add, 0, *lh += rh, PIXFMT, TYPE)\
X(sub, 0, *lh -= rh, PIXFMT, TYPE)\
X(mul, 0, *lh *= rh, PIXFMT, TYPE)\
X(div, 0, *lh /= rh, PIXFMT, TYPE)\
X(mod, 0, *lh = posmod(*lh, rh), PIXFMT, TYPE)\
X(exp, 1, *lh = pow(*lh, rh), PIXFMT, TYPE)\
X(log, 0, *lh = log2(*lh) / log2(rh), PIXFMT, TYPE)\
X(min, 0, *lh = MIN(*lh, rh), PIXFMT, TYPE)\
X(max, 0, *lh = MAX(*lh, rh), PIXFMT, TYPE)\
X(abs, 0, *lh = abs(*lh - rh) + rh, PIXFMT, TYPE)
#define P(L, R, ALGO, TYPE)\
(lh = (TYPE *)(streams[L].buf + k),\
rh = *((TYPE *)(streams[R].buf + k)),\
(ALGO))
#define X(NAME, RTL, ALGO, PIXFMT, TYPE)\
static void\
process_##PIXFMT##_##NAME(struct stream *streams, size_t n_streams, size_t n)\
{\
size_t i, j, k;\
TYPE *lh, rh;\
if (RTL) {\
for (i = 0; i < streams->n_chan; i++)\
if (!skip_ch[i])\
for (j = n_streams; --j;)\
for (k = i * sizeof(TYPE); k < n; k += 4 * sizeof(TYPE))\
P(j - 1, j, ALGO, TYPE);\
} else {\
for (i = 0; i < streams->n_chan; i++)\
if (!skip_ch[i])\
for (j = 1; j < n_streams; j++)\
for (k = i * sizeof(TYPE); k < n; k += 4 * sizeof(TYPE))\
P(0, j, ALGO, TYPE);\
}\
}
LIST_OPERATORS(lf, double)
LIST_OPERATORS(f, float)
#undef X
static process_func
get_process_lf(const char *operation)
{
#define X(NAME, _RTL, _ALGO, PIXFMT, _TYPE)\
if (!strcmp(operation, #NAME)) return process_##PIXFMT##_##NAME;
LIST_OPERATORS(lf, double)
#undef X
eprintf("algorithm not recognised: %s\n", operation);
return NULL;
}
static process_func
get_process_f(const char *operation)
{
#define X(NAME, _RTL, _ALGO, PIXFMT, _TYPE)\
if (!strcmp(operation, #NAME)) return process_##PIXFMT##_##NAME;
LIST_OPERATORS(f, float)
#undef X
eprintf("algorithm not recognised: %s\n", operation);
return NULL;
}
int
main(int argc, char *argv[])
{
struct stream *streams;
process_func process;
const char *operation;
size_t frames = SIZE_MAX, tmp;
int i;
ARGBEGIN {
case 'a':
skip_ch[3] = 1;
break;
case 'x':
case 'y':
case 'z':
skip_ch[ARGC() - 'x'] = 1;
break;
default:
usage();
} ARGEND;
if (argc < 2)
usage();
operation = *argv;
streams = alloca((size_t)argc * sizeof(*streams));
*argv = NULL;
for (i = 0; i < argc; i++) {
eopen_stream(streams + i, argv[i]);
if (streams[i].frames && streams[i].frames < frames)
frames = streams[i].frames;
}
if (streams->encoding == DOUBLE)
process = get_process_lf(operation);
else
process = get_process_f(operation);
tmp = streams->frames, streams->frames = frames;
fprint_stream_head(stdout, streams);
efflush(stdout, "<stdout>");
streams->frames = tmp;
process_multiple_streams(streams, (size_t)argc, STDOUT_FILENO, "<stdout>", 1, process);
return 0;
}
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