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authorPřemysl Eric Janouch <p@janouch.name>2023-06-05 17:52:58 +0200
committerPřemysl Eric Janouch <p@janouch.name>2023-06-05 18:11:37 +0200
commita9b34ca3f27ed0b3c10effd3fb884936d9b02485 (patch)
tree43d0eb0996573481cd88558b9d4e20008aa0413f /tools/webpinfo.c
parentbd92ad73ec995da9e2b2ca57faf011290f329d53 (diff)
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Unite most info tools into just one binary
Turn this into more of an fq alternative, when used with jq. Also don't say that TIFF files are Exif.
Diffstat (limited to 'tools/webpinfo.c')
-rw-r--r--tools/webpinfo.c133
1 files changed, 0 insertions, 133 deletions
diff --git a/tools/webpinfo.c b/tools/webpinfo.c
deleted file mode 100644
index f3417f9..0000000
--- a/tools/webpinfo.c
+++ /dev/null
@@ -1,133 +0,0 @@
-//
-// webpinfo.c: acquire information about WebP files in JSON format
-//
-// Copyright (c) 2021, 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 <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-// --- WebP --------------------------------------------------------------------
-// https://github.com/webmproject/libwebp/blob/master/doc/webp-container-spec.txt
-// https://github.com/webmproject/libwebp/blob/master/doc/webp-lossless-bitstream-spec.txt
-// https://datatracker.ietf.org/doc/html/rfc6386
-//
-// Pretty versions, hopefully not outdated:
-// https://developers.google.com/speed/webp/docs/riff_container
-// https://developers.google.com/speed/webp/docs/webp_lossless_bitstream_specification
-
-static jv
-parse_webp(jv o, const uint8_t *p, size_t len)
-{
- // libwebp won't let us simply iterate over all chunks, so handroll it.
- if (len < 12 || memcmp(p, "RIFF", 4) || memcmp(p + 8, "WEBP", 4))
- return add_error(o, "not a WEBP file");
-
- // TODO(p): This can still be parseable.
- // TODO(p): Warn on trailing data.
- uint32_t size = u32le(p + 4);
- if (8 + size < len)
- return add_error(o, "truncated file");
-
- const uint8_t *end = p + 8 + size;
- p += 12;
-
- jv chunks = jv_array();
- while (p < end) {
- if (end - p < 8) {
- o = add_warning(o, "framing mismatch");
- printf("%ld", end - p);
- break;
- }
-
- uint32_t chunk_size = u32le(p + 4);
- uint32_t chunk_advance = (chunk_size + 1) & ~1;
- if (p + 8 + chunk_advance > end) {
- o = add_warning(o, "runaway chunk payload");
- break;
- }
-
- char fourcc[5] = "";
- memcpy(fourcc, p, 4);
- chunks = jv_array_append(chunks, jv_string(fourcc));
- p += 8;
-
- // TODO(p): Decode VP8 and VP8L chunk metadata.
- if (!strcmp(fourcc, "EXIF"))
- o = parse_exif(o, p, chunk_size);
- if (!strcmp(fourcc, "ICCP"))
- o = parse_icc(o, p, chunk_size);
- p += chunk_advance;
- }
- return jv_set(o, jv_string("chunks"), chunks);
-}
-
-// --- 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_webp(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[])
-{
- (void) parse_psir;
-
- // XXX: Can't use `xargs -P0`, there's a risk of non-atomic writes.
- // Usage: find . -iname *.png -print0 | xargs -0 ./pnginfo
- 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;
-}