[libcamera-devel] [PATCH 2/2] utils: ipu3-pack: Provide a 10-bit bayer packing utility
Umang Jain
umang.jain at ideasonboard.com
Mon Jul 11 12:58:35 CEST 2022
Provide a 10-bit bayer packing utility for the unpacked data produced
by ipu3-unpack.
Usage: ipu3-unpack input-file output-file
The output-file can be "-" to unpack the data to stdout.
The output file generated by ipu3-pack can be directly fed to IMGU
for streaming.
Signed-off-by: Umang Jain <umang.jain at ideasonboard.com>
---
utils/ipu3/ipu3-pack.c | 100 +++++++++++++++++++++++++++++++++++++++++
utils/ipu3/meson.build | 1 +
2 files changed, 101 insertions(+)
create mode 100644 utils/ipu3/ipu3-pack.c
diff --git a/utils/ipu3/ipu3-pack.c b/utils/ipu3/ipu3-pack.c
new file mode 100644
index 00000000..328e3cd6
--- /dev/null
+++ b/utils/ipu3/ipu3-pack.c
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * ipu3-pack - Pack IPU3 raw Bayer format to 10-bit Bayer
+ *
+ * Copyright 2022 Umang Jain <umang.jain at 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('-' to use stdout)\n", basename(argv0));
+ printf("Convert unpacked RAW10 Bayer data to the IPU3 packed Bayer formats\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;
+ fflush(stdout);
+ } 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));
+ return 1;
+ }
+ }
+
+ while (1) {
+ uint16_t in_data[25];
+ uint8_t out_data[32];
+ unsigned int i;
+
+ int bytes_to_read = sizeof(in_data);
+ ret = read(in_fd, in_data, bytes_to_read);
+ if (ret == -1) {
+ fprintf(stderr, "Failed to read input data: %s\n",
+ strerror(errno));
+ goto done;
+ }
+
+ if (ret < bytes_to_read) {
+ if (ret != 0)
+ fprintf(stderr, "%u bytes of stray data at end of input\n",
+ ret);
+ break;
+ }
+
+ 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;
+}
diff --git a/utils/ipu3/meson.build b/utils/ipu3/meson.build
index 88049f58..c92cc658 100644
--- a/utils/ipu3/meson.build
+++ b/utils/ipu3/meson.build
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: CC0-1.0
+ipu3_pack = executable('ipu3-pack', 'ipu3-pack.c')
ipu3_unpack = executable('ipu3-unpack', 'ipu3-unpack.c')
--
2.31.1
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