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/* See LICENSE file for copyright and license details. */
#include "stream.h"
#include "util.h"
#include <arpa/inet.h>
#if defined(HAVE_PRCTL)
# include <sys/prctl.h>
#endif
#include <sys/wait.h>
#include <signal.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
USAGE("[-d] frame-rate ffmpeg-arguments ...")
static int draft = 0;
static void
process_xyza(char *buf, size_t n, int fd, const char *fname)
{
double *pixel, r, g, b;
uint16_t *pixels, *end;
uint16_t pixbuf[1024];
long int a, y, u, v;
size_t ptr;
pixels = pixbuf;
end = pixbuf + ELEMENTSOF(pixbuf);
if (draft) {
for (ptr = 0; ptr < n; ptr += sizeof(pixel)) {
pixel = (double *)(buf + ptr);
a = (long int)(pixel[3] * 0xFFFFL);
ciexyz_to_scaled_yuv(pixel[0], pixel[1], pixel[2], &r, &g, &b);
y = (long int)r + 16 * 256;
u = (long int)g + 128 * 256;
v = (long int)b + 128 * 256;
*pixels++ = htons((uint16_t)(a < 0 ? 0 : a > 0xFFFFL ? 0xFFFFL : a));
*pixels++ = htons((uint16_t)(y < 0 ? 0 : y > 0xFFFFL ? 0xFFFFL : y));
*pixels++ = htons((uint16_t)(u < 0 ? 0 : u > 0xFFFFL ? 0xFFFFL : u));
*pixels++ = htons((uint16_t)(v < 0 ? 0 : v > 0xFFFFL ? 0xFFFFL : v));
if (pixels == end)
ewriteall(fd, pixels = pixbuf, sizeof(pixbuf), fname);
}
} else {
for (ptr = 0; ptr < n; ptr += sizeof(pixel)) {
pixel = (double *)(buf + ptr);
a = (long int)(pixel[3] * 0xFFFFL);
ciexyz_to_srgb(pixel[0], pixel[1], pixel[2], &r, &g, &b);
r = srgb_encode(r);
g = srgb_encode(g);
b = srgb_encode(b);
srgb_to_yuv(r, g, b, pixel + 0, pixel + 1, pixel + 2);
y = (long int)(pixel[0] * 0xFFFFL);
u = (long int)(pixel[1] * 0xFFFFL);
v = (long int)(pixel[2] * 0xFFFFL);
y += 16 * 256;
u += 128 * 256;
v += 128 * 256;
*pixels++ = htons((uint16_t)(a < 0 ? 0 : a > 0xFFFFL ? 0xFFFFL : a));
*pixels++ = htons((uint16_t)(y < 0 ? 0 : y > 0xFFFFL ? 0xFFFFL : y));
*pixels++ = htons((uint16_t)(u < 0 ? 0 : u > 0xFFFFL ? 0xFFFFL : u));
*pixels++ = htons((uint16_t)(v < 0 ? 0 : v > 0xFFFFL ? 0xFFFFL : v));
if (pixels == end)
ewriteall(fd, pixels = pixbuf, sizeof(pixbuf), fname);
}
}
if (pixels != pixbuf)
ewriteall(fd, pixels = pixbuf, sizeof(pixbuf), fname);
}
int
main(int argc, char *argv[])
{
struct stream stream;
char geometry[2 * 3 * sizeof(size_t) + 2];
char *frame_rate;
const char **cmd;
size_t n = 0;
int status, pipe_rw[2];
pid_t pid;
void (*process)(char *buf, size_t n, int fd, const char *fname) = NULL;
ARGBEGIN {
case 'd':
draft = 1;
break;
default:
usage();
} ARGEND;
if (argc < 2)
usage();
frame_rate = *argv++, argc--;
cmd = ecalloc((size_t)argc + 12, sizeof(*cmd));
cmd[n++] = "ffmpeg";
cmd[n++] = "-f", cmd[n++] = "rawvideo";
cmd[n++] = "-pix_fmt", cmd[n++] = "ayuv64le";
cmd[n++] = "-r", cmd[n++] = frame_rate;
cmd[n++] = "-s:v", cmd[n++] = geometry;
cmd[n++] = "-i", cmd[n++] = "-";
memcpy(cmd + n, argv, (size_t)argc * sizeof(*cmd));
stream.file = "<stdin>";
stream.fd = STDIN_FILENO;
einit_stream(&stream);
sprintf(geometry, "%zux%zu", stream.width, stream.height);
if (!strcmp(stream.pixfmt, "xyza"))
process = process_xyza;
else
eprintf("pixel format %s is not supported, try xyza\n", stream.pixfmt);
if (pipe(pipe_rw))
eprintf("pipe:");
pid = fork();
if (pid < 0)
eprintf("fork:");
if (!pid) {
#if defined(HAVE_PRCTL) && defined(PR_SET_PDEATHSIG)
prctl(PR_SET_PDEATHSIG, SIGKILL);
#endif
close(pipe_rw[1]);
if (dup2(pipe_rw[0], STDIN_FILENO) == -1)
eprintf("dup2:");
close(pipe_rw[0]);
eprintf("exec ffmpeg:");
}
close(pipe_rw[0]);
while (!eread_stream(&stream, SIZE_MAX)) {
n = stream.ptr - (stream.ptr % stream.pixel_size);
process(stream.buf, n, pipe_rw[1], "<subprocess>");
memmove(stream.buf, stream.buf + n, stream.ptr -= n);
}
close(pipe_rw[1]);
if (waitpid(pid, &status, 0) == -1)
eprintf("waitpid:");
return !!status;
}
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