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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* ipu3-pack - Convert unpacked RAW10 Bayer data to the IPU3 packed Bayer formats
*
* Copyright 2022 Umang Jain <umang.jain@ideasonboard.com>
*/
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <libgen.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
static void usage(char *argv0)
{
printf("Usage: %s input-file output-file\n", basename(argv0));
printf("Convert unpacked RAW10 Bayer data to the IPU3 packed Bayer formats\n");
printf("If the output-file '-', output data will be written to standard output\n");
}
int main(int argc, char *argv[])
{
int in_fd;
int out_fd;
int ret;
if (argc != 3) {
usage(argv[0]);
return 1;
}
in_fd = open(argv[1], O_RDONLY);
if (in_fd == -1) {
fprintf(stderr, "Failed to open input file '%s': %s\n",
argv[1], strerror(errno));
return 1;
}
if (strcmp(argv[2], "-") == 0) {
out_fd = STDOUT_FILENO;
} else {
out_fd = open(argv[2], O_WRONLY | O_TRUNC | O_CREAT, 0644);
if (out_fd == -1) {
fprintf(stderr, "Failed to open output file '%s': %s\n",
argv[2], strerror(errno));
close(in_fd);
return 1;
}
}
while (1) {
uint16_t in_data[25];
uint8_t out_data[32];
unsigned int i;
ret = read(in_fd, in_data, sizeof(in_data));
if (ret < 0) {
fprintf(stderr, "Failed to read input data: %s\n",
strerror(errno));
goto done;
}
if ((unsigned)ret < sizeof(in_data)) {
if (ret != 0)
fprintf(stderr, "%u bytes of stray data at end of input\n",
ret);
goto done;
}
for (i = 0; i < 30; ++i) {
unsigned int index = (i * 8) / 10;
unsigned int msb_shift = (i * 8) % 10;
unsigned int lsb_shift = 10 - msb_shift;
out_data[i] = ((in_data[index] >> msb_shift) & 0xff)
| ((in_data[index+1] << lsb_shift) & 0xff);
}
out_data[30] = (in_data[24] >> 0) & 0xff;
out_data[31] = (in_data[24] >> 8) & 0x03;
ret = write(out_fd, out_data, sizeof(out_data));
if (ret < 0) {
fprintf(stderr, "Failed to write output data: %s\n",
strerror(errno));
goto done;
}
}
done:
close(in_fd);
if (out_fd != STDOUT_FILENO)
close(out_fd);
return ret ? 1 : 0;
}
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