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//
// rawinfo.c: acquire information about raw image files in JSON format
//
// Copyright (c) 2023, Přemysl Eric Janouch <p@janouch.name>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
#include "info.h"
#include <jv.h>
#include <libraw.h>
#if LIBRAW_VERSION < LIBRAW_MAKE_VERSION(0, 21, 0)
#error LibRaw 0.21.0 or newer is required.
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// --- Raw image files ---------------------------------------------------------
// This is in principle similar to LibRaw's `raw-identify -v`,
// but the output is machine-processable.
static jv
parse_raw(jv o, const uint8_t *p, size_t len)
{
libraw_data_t *iprc = libraw_init(LIBRAW_OPIONS_NO_DATAERR_CALLBACK);
if (!iprc)
return add_error(o, "failed to obtain a LibRaw handle");
int err = 0;
if ((err = libraw_open_buffer(iprc, p, len))) {
libraw_close(iprc);
return add_error(o, libraw_strerror(err));
}
o = jv_set(o, jv_string("width"), jv_number(iprc->sizes.width));
o = jv_set(o, jv_string("height"), jv_number(iprc->sizes.height));
o = jv_set(o, jv_string("flip"), jv_number(iprc->sizes.flip));
// -> iprc->rawparams.shot_select
o = jv_set(o, jv_string("count"), jv_number(iprc->idata.raw_count));
jv thumbnails = jv_array();
for (int i = 0; i < iprc->thumbs_list.thumbcount; i++) {
libraw_thumbnail_item_t *item = iprc->thumbs_list.thumblist + i;
const char *format = "?";
switch (item->tformat) {
case LIBRAW_INTERNAL_THUMBNAIL_UNKNOWN:
format = "unknown";
break;
case LIBRAW_INTERNAL_THUMBNAIL_KODAK_THUMB:
format = "Kodak thumbnail";
break;
case LIBRAW_INTERNAL_THUMBNAIL_KODAK_YCBCR:
format = "Kodak YCbCr";
break;
case LIBRAW_INTERNAL_THUMBNAIL_KODAK_RGB:
format = "Kodak RGB";
break;
case LIBRAW_INTERNAL_THUMBNAIL_JPEG:
format = "JPEG";
break;
case LIBRAW_INTERNAL_THUMBNAIL_LAYER:
format = "layer";
break;
case LIBRAW_INTERNAL_THUMBNAIL_ROLLEI:
format = "Rollei";
break;
case LIBRAW_INTERNAL_THUMBNAIL_PPM:
format = "PPM";
break;
case LIBRAW_INTERNAL_THUMBNAIL_PPM16:
format = "PPM16";
break;
case LIBRAW_INTERNAL_THUMBNAIL_X3F:
format = "X3F";
break;
}
thumbnails = jv_array_append(thumbnails,
JV_OBJECT(jv_string("width"), jv_number(item->twidth),
jv_string("height"), jv_number(item->theight),
jv_string("flip"), jv_number(item->tflip),
jv_string("format"), jv_string(format)));
}
libraw_close(iprc);
return jv_set(o, jv_string("thumbnails"), thumbnails);
}
// --- I/O ---------------------------------------------------------------------
static jv
do_file(const char *filename, jv o)
{
const char *err = NULL;
FILE *fp = fopen(filename, "rb");
if (!fp) {
err = strerror(errno);
goto error;
}
uint8_t *data = NULL, buf[256 << 10];
size_t n, len = 0;
while ((n = fread(buf, sizeof *buf, sizeof buf / sizeof *buf, fp))) {
data = realloc(data, len + n);
memcpy(data + len, buf, n);
len += n;
}
if (ferror(fp)) {
err = strerror(errno);
goto error_read;
}
o = parse_raw(o, data, len);
error_read:
fclose(fp);
free(data);
error:
if (err)
o = add_error(o, err);
return o;
}
int
main(int argc, char *argv[])
{
// XXX: Can't use `xargs -P0`, there's a risk of non-atomic writes.
// Usage: find . -iname *.png -print0 | xargs -0 ./rawinfo
for (int i = 1; i < argc; i++) {
const char *filename = argv[i];
jv o = jv_object();
o = jv_object_set(o, jv_string("filename"), jv_string(filename));
o = do_file(filename, o);
jv_dumpf(o, stdout, 0 /* Might consider JV_PRINT_SORTED. */);
fputc('\n', stdout);
}
return 0;
}
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