/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * ipu3-unpack - Unpack IPU3 raw Bayer format to 16-bit Bayer * * Copyright 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com> */ #define _GNU_SOURCE #include <errno.h> #include <fcntl.h> #include <stdint.h> #include <stdio.h> #include <string.h> #include <sys/stat.h> #include <sys/types.h> #include <unistd.h> static void usage(const char *argv0) { printf("Usage: %s input-file output-file\n", basename(argv0)); printf("Unpack the IPU3 raw Bayer format to 16-bit Bayer\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; } 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)); return 1; } while (1) { uint8_t in_data[32]; uint8_t out_data[50]; unsigned int i; ret = read(in_fd, in_data, 32); if (ret == -1) { fprintf(stderr, "Failed to read input data: %s\n", strerror(errno)); goto done; } if (ret < 32) { if (ret != 0) fprintf(stderr, "%u bytes of stray data at end of input\n", ret); break; } for (i = 0; i < 25; ++i) { unsigned int index = (i * 10) / 8; unsigned int lsb_shift = (i * 10) % 8; unsigned int msb_shift = 8 - lsb_shift; uint16_t pixel; pixel = ((in_data[index+1] << msb_shift) & 0x3ff) | ((in_data[index+0] >> lsb_shift) & 0x3ff); out_data[i*2+0] = (pixel >> 0) & 0xff; out_data[i*2+1] = (pixel >> 8) & 0xff; } ret = write(out_fd, out_data, 50); if (ret < -1) { fprintf(stderr, "Failed to read input data: %s\n", strerror(errno)); goto done; } } done: close(in_fd); close(out_fd); return ret ? 1 : 0; }