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-rw-r--r--tools/jpeginfo.c239
1 files changed, 130 insertions, 109 deletions
diff --git a/tools/jpeginfo.c b/tools/jpeginfo.c
index 4545746..05d4568 100644
--- a/tools/jpeginfo.c
+++ b/tools/jpeginfo.c
@@ -309,7 +309,7 @@ tiffer_next_entry(struct tiffer *self, struct tiffer_entry *entry)
entry->p = self->p;
self->p += sizeof offset;
} else if (tiffer_u32(self, &offset)) {
- entry->p = self->p + offset;
+ entry->p = self->begin + offset;
} else {
return false;
}
@@ -326,111 +326,111 @@ tiffer_next_entry(struct tiffer *self, struct tiffer_entry *entry)
// --- TIFF/Exif/MPF/* tags ----------------------------------------------------
+struct tiff_value {
+ const char *name;
+ uint16_t value;
+};
+
struct tiff_entry {
const char *name;
uint16_t tag;
+ struct tiff_value *values;
};
static struct tiff_entry tiff_entries[] = {
- {"NewSubfileType", 254},
- {"SubfileType", 255},
- {"ImageWidth", 256},
- {"ImageLength", 257},
- {"BitsPerSample", 258},
- {"Compression", 259},
- {"PhotometricInterpretation", 262},
- {"Threshholding", 263},
- {"CellWidth", 264},
- {"CellLength", 265},
- {"FillOrder", 266},
- {"DocumentName", 269},
- {"ImageDescription", 270},
- {"Make", 271},
- {"Model", 272},
- {"StripOffsets", 273},
- {"Orientation", 274},
- {"SamplesPerPixel", 277},
- {"RowsPerStrip", 278},
- {"StripByteCounts", 279},
- {"MinSampleValue", 280},
- {"MaxSampleValue", 281},
- {"XResolution", 282},
- {"YResolution", 283},
- {"PlanarConfiguration", 284},
- {"PageName", 285},
- {"XPosition", 286},
- {"YPosition", 287},
- {"FreeOffsets", 288},
- {"FreeByteCounts", 289},
- {"GrayResponseUnit", 290},
- {"GrayResponseCurve", 291},
- {"T4Options", 292},
- {"T6Options", 293},
- {"ResolutionUnit", 296},
- {"PageNumber", 297},
- {"TransferFunction", 301},
- {"Software", 305},
- {"DateTime", 306},
- {"Artist", 315},
- {"HostComputer", 316},
- {"Predictor", 317},
- {"WhitePoint", 318},
- {"PrimaryChromaticities", 319},
- {"ColorMap", 320},
- {"HalftoneHints", 321},
- {"TileWidth", 322},
- {"TileLength", 323},
- {"TileOffsets", 324},
- {"TileByteCounts", 325},
- {"InkSet", 332},
- {"InkNames", 333},
- {"NumberOfInks", 334},
- {"DotRange", 336},
- {"TargetPrinter", 337},
- {"ExtraSamples", 338},
- {"SampleFormat", 339},
- {"SMinSampleValue", 340},
- {"SMaxSampleValue", 341},
- {"TransferRange", 342},
- {"JPEGProc", 512},
- {"JPEGInterchangeFormat", 513},
- {"JPEGInterchangeFormatLngth", 514},
- {"JPEGRestartInterval", 515},
- {"JPEGLosslessPredictors", 517},
- {"JPEGPointTransforms", 518},
- {"JPEGQTables", 519},
- {"JPEGDCTables", 520},
- {"JPEGACTables", 521},
- {"YCbCrCoefficients", 529},
- {"YCbCrSubSampling", 530},
- {"YCbCrPositioning", 531},
- {"ReferenceBlackWhite", 532},
- {"Copyright", 33432},
- {}
-};
-
-// Compression
-static struct tiff_entry tiff_compression_values[] = {
- {"Uncompressed", 1},
- {"CCITT 1D", 2},
- {"Group 3 Fax", 3},
- {"Group 4 Fax", 4},
- {"LZW", 5},
- {"JPEG", 6},
- {"PackBits", 32773},
- {}
-};
-
-// PhotometricInterpretation
-static struct tiff_entry tiff_photometric_interpretation_values[] = {
- {"WhiteIsZero", 0},
- {"BlackIsZero", 1},
- {"RGB", 2},
- {"RGB Palette", 3},
- {"Transparency mask", 4},
- {"CMYK", 5},
- {"YCbCr", 6},
- {"CIELab", 8},
+ {"NewSubfileType", 254, NULL},
+ {"SubfileType", 255, NULL},
+ {"ImageWidth", 256, NULL},
+ {"ImageLength", 257, NULL},
+ {"BitsPerSample", 258, NULL},
+ {"Compression", 259, (struct tiff_value[]) {
+ {"Uncompressed", 1},
+ {"CCITT 1D", 2},
+ {"Group 3 Fax", 3},
+ {"Group 4 Fax", 4},
+ {"LZW", 5},
+ {"JPEG", 6},
+ {"PackBits", 32773},
+ {}
+ }},
+ {"PhotometricInterpretation", 262, (struct tiff_value[]) {
+ {"WhiteIsZero", 0},
+ {"BlackIsZero", 1},
+ {"RGB", 2},
+ {"RGB Palette", 3},
+ {"Transparency mask", 4},
+ {"CMYK", 5},
+ {"YCbCr", 6},
+ {"CIELab", 8},
+ {}
+ }},
+ {"Threshholding", 263, NULL},
+ {"CellWidth", 264, NULL},
+ {"CellLength", 265, NULL},
+ {"FillOrder", 266, NULL},
+ {"DocumentName", 269, NULL},
+ {"ImageDescription", 270, NULL},
+ {"Make", 271, NULL},
+ {"Model", 272, NULL},
+ {"StripOffsets", 273, NULL},
+ {"Orientation", 274, NULL},
+ {"SamplesPerPixel", 277, NULL},
+ {"RowsPerStrip", 278, NULL},
+ {"StripByteCounts", 279, NULL},
+ {"MinSampleValue", 280, NULL},
+ {"MaxSampleValue", 281, NULL},
+ {"XResolution", 282, NULL},
+ {"YResolution", 283, NULL},
+ {"PlanarConfiguration", 284, NULL},
+ {"PageName", 285, NULL},
+ {"XPosition", 286, NULL},
+ {"YPosition", 287, NULL},
+ {"FreeOffsets", 288, NULL},
+ {"FreeByteCounts", 289, NULL},
+ {"GrayResponseUnit", 290, NULL},
+ {"GrayResponseCurve", 291, NULL},
+ {"T4Options", 292, NULL},
+ {"T6Options", 293, NULL},
+ {"ResolutionUnit", 296, NULL},
+ {"PageNumber", 297, NULL},
+ {"TransferFunction", 301, NULL},
+ {"Software", 305, NULL},
+ {"DateTime", 306, NULL},
+ {"Artist", 315, NULL},
+ {"HostComputer", 316, NULL},
+ {"Predictor", 317, NULL},
+ {"WhitePoint", 318, NULL},
+ {"PrimaryChromaticities", 319, NULL},
+ {"ColorMap", 320, NULL},
+ {"HalftoneHints", 321, NULL},
+ {"TileWidth", 322, NULL},
+ {"TileLength", 323, NULL},
+ {"TileOffsets", 324, NULL},
+ {"TileByteCounts", 325, NULL},
+ {"InkSet", 332, NULL},
+ {"InkNames", 333, NULL},
+ {"NumberOfInks", 334, NULL},
+ {"DotRange", 336, NULL},
+ {"TargetPrinter", 337, NULL},
+ {"ExtraSamples", 338, NULL},
+ {"SampleFormat", 339, NULL},
+ {"SMinSampleValue", 340, NULL},
+ {"SMaxSampleValue", 341, NULL},
+ {"TransferRange", 342, NULL},
+ {"JPEGProc", 512, NULL},
+ {"JPEGInterchangeFormat", 513, NULL},
+ {"JPEGInterchangeFormatLngth", 514, NULL},
+ {"JPEGRestartInterval", 515, NULL},
+ {"JPEGLosslessPredictors", 517, NULL},
+ {"JPEGPointTransforms", 518, NULL},
+ {"JPEGQTables", 519, NULL},
+ {"JPEGDCTables", 520, NULL},
+ {"JPEGACTables", 521, NULL},
+ {"YCbCrCoefficients", 529, NULL},
+ {"YCbCrSubSampling", 530, NULL},
+ {"YCbCrPositioning", 531, NULL},
+ {"ReferenceBlackWhite", 532, NULL},
+ {"Copyright", 33432, NULL},
{}
};
@@ -465,15 +465,36 @@ add_error(jv o, const char *message)
// --- Exif --------------------------------------------------------------------
-// TODO(p): Decode more and better.
static jv
-process_exif_entry(jv o, const struct tiffer_entry *entry)
+process_exif_entry(jv o, struct tiffer *T, const struct tiffer_entry *entry)
{
+ jv value = jv_true();
+
+ // TODO(p): Decode much more, and also descend into sub-IFD trees.
+ bool numeric = false;
+ double real = 0;
+ if (!entry->remaining_count) {
+ value = jv_null();
+ } else if (entry->type == ASCII) {
+ value = jv_string_sized((const char *) entry->p,
+ entry->remaining_count - 1);
+ } else if ((numeric = tiffer_real(T, entry, &real))) {
+ value = jv_number(real);
+ }
+
for (const struct tiff_entry *p = tiff_entries; p->name; p++) {
- if (p->tag == entry->tag)
- return add_to_subarray(o, "TIFF", jv_string(p->name));
+ if (p->tag != entry->tag)
+ continue;
+
+ if (numeric && p->values) {
+ for (const struct tiff_value *q = p->values; q->name; q++) {
+ if (q->value == real)
+ return jv_set(o, jv_string(p->name), jv_string(q->name));
+ }
+ }
+ return jv_set(o, jv_string(p->name), value);
}
- return add_to_subarray(o, "TIFF", jv_number(entry->tag));
+ return jv_set(o, jv_string_fmt("%u", entry->tag), value);
}
static jv
@@ -483,12 +504,12 @@ parse_exif(jv o, const uint8_t *p, size_t len)
if (!tiffer_init(&T, p, len))
return add_warning(o, "invalid Exif");
- // TODO(p): Turn this into an array of objects indexed by tag name.
struct tiffer_entry entry;
while (tiffer_next_ifd(&T)) {
- while (tiffer_next_entry(&T, &entry)) {
- o = process_exif_entry(o, &entry);
- }
+ jv ifd = jv_object();
+ while (tiffer_next_entry(&T, &entry))
+ ifd = process_exif_entry(ifd, &T, &entry);
+ o = add_to_subarray(o, "TIFF", ifd);
}
return o;
}
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-25 07:10:43 +0000