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-rw-r--r--tools/jpeginfo.c63
1 files changed, 47 insertions, 16 deletions
diff --git a/tools/jpeginfo.c b/tools/jpeginfo.c
index 3a84880..a90c266 100644
--- a/tools/jpeginfo.c
+++ b/tools/jpeginfo.c
@@ -990,29 +990,65 @@ enum {
TotalFrames = 45060,
};
-static void
-parse_mpf_entries(
- struct data *data, struct tiffer *T, const struct tiffer_entry *entry)
+static jv
+parse_mpf_index_entry(
+ jv o, struct data *data, struct tiffer *T, struct tiffer_entry *entry)
{
// 5.2.3.3. MP Entry
if (entry->tag != MPEntry || entry->type != UNDEFINED ||
- entry->remaining_count % 16)
- return;
+ entry->remaining_count % 16) {
+ // TODO(p): Parse the remaining special tags instead.
+ return parse_exif_entry(o, T, entry);
+ }
uint32_t count = entry->remaining_count / 16;
+ jv a = jv_array_sized(count);
+
const uint8_t **out = data->mpf_next = data->mpf_offsets =
calloc(sizeof *data->mpf_offsets, count + 1);
for (uint32_t i = 0; i < count; i++) {
const uint8_t *p = entry->p + i * 16;
- // uint32_t attribute = T->un->u32(p);
- // uint32_t size = T->un->u32(p + 4);
+ uint32_t attrs = T->un->u32(p);
+ uint32_t size = T->un->u32(p + 4);
uint32_t offset = T->un->u32(p + 8);
- // uint16_t dependent1 = T->un->u16(p + 12);
- // uint16_t dependent2 = T->un->u16(p + 14);
+ uint16_t dependent1 = T->un->u16(p + 12);
+ uint16_t dependent2 = T->un->u16(p + 14);
+
+ uint32_t type_number = attrs & 0xFFFFFF;
+ jv type = jv_number(type_number);
+ switch (type_number) {
+ break; case 0x030000: type = jv_string("Baseline MP Primary Image");
+ break; case 0x010001: type = jv_string("Large Thumbnail VGA");
+ break; case 0x010002: type = jv_string("Large Thumbnail Full HD");
+ break; case 0x020001: type = jv_string("Multi-Frame Image Panorama");
+ break; case 0x020002: type = jv_string("Multi-Frame Image Disparity");
+ break; case 0x020003: type = jv_string("Multi-Frame Image Multi-Angle");
+ break; case 0x000000: type = jv_string("Undefined");
+ }
+ uint32_t format_number = (attrs >> 24) & 0x7;
+ jv format = jv_number(format_number);
+ if (format_number == 0)
+ format = jv_string("JPEG");
+
+ a = jv_array_append(a, JV_OBJECT(
+ jv_string("Individual Image Attribute"), JV_OBJECT(
+ jv_string("Dependent Parent Image"), jv_bool((attrs >> 31) & 1),
+ jv_string("Dependent Child Image"), jv_bool((attrs >> 30) & 1),
+ jv_string("Representative Image"), jv_bool((attrs >> 29) & 1),
+ jv_string("Reserved"), jv_number((attrs >> 27) & 0x3),
+ jv_string("Image Data Format"), format,
+ jv_string("MP Type Code"), type
+ ),
+ jv_string("Individual Image Size"), jv_number(size),
+ jv_string("Individual Image Data Offset"), jv_number(offset),
+ jv_string("Dependent Image 1 Entry Number"), jv_number(dependent1),
+ jv_string("Dependent Image 2 Entry Number"), jv_number(dependent2)
+ ));
if (offset)
*out++ = T->begin + offset;
}
+ return jv_set(o, jv_string("MPEntry"), a);
}
static jv
@@ -1020,13 +1056,8 @@ parse_mpf_index_ifd(struct data *data, struct tiffer *T)
{
jv ifd = jv_object();
struct tiffer_entry entry = {};
- while (tiffer_next_entry(T, &entry)) {
- struct tiffer_entry copy = entry;
- parse_mpf_entries(data, T, &entry);
-
- // TODO(p): Parse the special tags instead.
- ifd = parse_exif_entry(ifd, T, &copy);
- }
+ while (tiffer_next_entry(T, &entry))
+ ifd = parse_mpf_index_entry(ifd, data, T, &entry);
return ifd;
}