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jpeginfo: clean up MPF

This commit is contained in:
Přemysl Eric Janouch 2021-12-06 19:32:54 +01:00
parent a519a5dec6
commit 3fe2f60a19
Signed by: p
GPG Key ID: A0420B94F92B9493
1 changed files with 151 additions and 108 deletions
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257
tools/jpeginfo.c
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@ -331,7 +331,6 @@ tiffer_next_entry(struct tiffer *self, struct tiffer_entry *entry)
if (!self->remaining_fields)
return false;
// Note that Multi-Picture Format doesn't require ascending tag order.
uint16_t type = entry->type = 0xFFFF;
if (!tiffer_u16(self, &entry->tag) || !tiffer_u16(self, &type) ||
!tiffer_u32(self, &entry->remaining_count))
@ -359,7 +358,7 @@ tiffer_next_entry(struct tiffer *self, struct tiffer_entry *entry)
return true;
}
// --- TIFF/Exif/MPF/* tags ----------------------------------------------------
// --- TIFF/Exif tags ----------------------------------------------------------
struct tiff_value {
const char *name;
@ -1360,6 +1359,151 @@ parse_psir(jv o, const uint8_t *p, size_t len)
return o;
}
// --- Multi-Picture Format ----------------------------------------------------
enum {
MPF_MPFVersion = 45056,
MPF_NumberOfImages = 45057,
MPF_MPEntry = 45058,
MPF_ImageUIDList = 45059,
MPF_TotalFrames = 45060,
MPF_MPIndividualNum = 45313,
MPF_PanOrientation = 45569,
MPF_PanOverlap_H = 45570,
MPF_PanOverlap_V = 45571,
MPF_BaseViewpointNum = 45572,
MPF_ConvergenceAngle = 45573,
MPF_BaselineLength = 45574,
MPF_VerticalDivergence = 45575,
MPF_AxisDistance_X = 45576,
MPF_AxisDistance_Y = 45577,
MPF_AxisDistance_Z = 45578,
MPF_YawAngle = 45579,
MPF_PitchAngle = 45580,
MPF_RollAngle = 45581
};
static struct tiff_entry mpf_entries[] = {
{"MP Format Version Number", MPF_MPFVersion, NULL},
{"Number of Images", MPF_NumberOfImages, NULL},
{"MP Entry", MPF_MPEntry, NULL},
{"Individual Image Unique ID List", MPF_ImageUIDList, NULL},
{"Total Number of Captured Frames", MPF_TotalFrames, NULL},
{"MP Individual Image Number", MPF_MPIndividualNum, NULL},
{"Panorama Scanning Orientation", MPF_PanOrientation, NULL},
{"Panorama Horizontal Overlap", MPF_PanOverlap_H, NULL},
{"Panorama Vertical Overlap", MPF_PanOverlap_V, NULL},
{"Base Viewpoint Number", MPF_BaseViewpointNum, NULL},
{"Convergence Angle", MPF_ConvergenceAngle, NULL},
{"Baseline Length", MPF_BaselineLength, NULL},
{"Divergence Angle", MPF_VerticalDivergence, NULL},
{"Horizontal Axis Distance", MPF_AxisDistance_X, NULL},
{"Vertical Axis Distance", MPF_AxisDistance_Y, NULL},
{"Collimation Axis Distance", MPF_AxisDistance_Z, NULL},
{"Yaw Angle", MPF_YawAngle, NULL},
{"Pitch Angle", MPF_PitchAngle, NULL},
{"Roll Angle", MPF_RollAngle, NULL},
{}
};
static uint32_t
parse_mpf_mpentry(jv *a, const uint8_t *p, struct tiffer *T)
{
uint32_t attrs = T->un->u32(p);
uint32_t offset = T->un->u32(p + 8);
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(T->un->u32(p + 4)),
jv_string("Individual Image Data Offset"),
jv_number(offset),
jv_string("Dependent Image 1 Entry Number"),
jv_number(T->un->u16(p + 12)),
jv_string("Dependent Image 2 Entry Number"),
jv_number(T->un->u16(p + 14))
));
// Don't report non-JPEGs, even though they're unlikely.
return format_number == 0 ? offset : 0;
}
static jv
parse_mpf_index_entry(jv o, const uint8_t ***offsets, struct tiffer *T,
struct tiffer_entry *entry)
{
// 5.2.3.3. MP Entry
if (entry->tag != MPF_MPEntry || entry->type != UNDEFINED ||
entry->remaining_count % 16) {
return parse_exif_entry(o, T, entry, mpf_entries);
}
uint32_t count = entry->remaining_count / 16;
jv a = jv_array_sized(count);
const uint8_t **out = *offsets = calloc(sizeof *out, count + 1);
for (uint32_t i = 0; i < count; i++) {
uint32_t offset = parse_mpf_mpentry(&a, entry->p + i * 16, T);
if (offset)
*out++ = T->begin + offset;
}
return jv_set(o, jv_string("MP Entry"), a);
}
static jv
parse_mpf_index_ifd(const uint8_t ***offsets, struct tiffer *T)
{
jv ifd = jv_object();
struct tiffer_entry entry = {};
while (tiffer_next_entry(T, &entry))
ifd = parse_mpf_index_entry(ifd, offsets, T, &entry);
return ifd;
}
static jv
parse_mpf(jv o, const uint8_t ***offsets, const uint8_t *p, size_t len)
{
struct tiffer T;
if (!tiffer_init(&T, p, len) || !tiffer_next_ifd(&T))
return add_warning(o, "invalid MPF segment");
// First image: IFD0 is Index IFD, any IFD1 is Attribute IFD.
// Other images: IFD0 is Attribute IFD, there is no Index IFD.
if (!*offsets) {
o = add_to_subarray(o, "MPF", parse_mpf_index_ifd(offsets, &T));
if (!tiffer_next_ifd(&T))
return o;
}
// This isn't optimal, but it will do.
return add_to_subarray(o, "MPF", parse_exif_ifd(&T, mpf_entries));
}
// --- JPEG --------------------------------------------------------------------
// Because the JPEG file format is simple, just do it manually.
// See: https://www.w3.org/Graphics/JPEG/itu-t81.pdf
@ -1493,109 +1637,6 @@ struct data {
const uint8_t **mpf_offsets, **mpf_next;
};
enum {
MPFVersion = 45056,
NumberOfImages = 45057,
MPEntry = 45058,
ImageUIDList = 45059,
TotalFrames = 45060,
};
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) {
// TODO(p): Parse the remaining special tags instead.
return parse_exif_entry(o, T, entry, NULL);
}
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 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);
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
parse_mpf_index_ifd(struct data *data, struct tiffer *T)
{
jv ifd = jv_object();
struct tiffer_entry entry = {};
while (tiffer_next_entry(T, &entry))
ifd = parse_mpf_index_entry(ifd, data, T, &entry);
return ifd;
}
static jv
parse_mpf_attribute_ifd(struct tiffer *T)
{
// TODO(p): Parse the special tags instead.
return parse_exif_ifd(T, NULL);
}
static jv
parse_mpf(jv o, struct data *data, const uint8_t *p, size_t len)
{
struct tiffer T;
if (!tiffer_init(&T, p, len) || !tiffer_next_ifd(&T))
return add_warning(o, "invalid MPF segment");
// First image: IFD0 is Index IFD, any IFD1 is Attribute IFD.
// Other images: IFD0 is Attribute IFD, there is no Index IFD.
if (!data->mpf_offsets) {
o = add_to_subarray(o, "MPF", parse_mpf_index_ifd(data, &T));
if (!tiffer_next_ifd(&T))
return o;
}
return add_to_subarray(o, "MPF", parse_mpf_attribute_ifd(&T));
}
static void
parse_append(uint8_t **buffer, size_t *buffer_len, const uint8_t *p, size_t len)
{
@ -1613,7 +1654,8 @@ parse_marker(uint8_t marker, const uint8_t *p, const uint8_t *end,
// Found: Random metadata! Multi-Picture Format!
if ((data->ended = marker == EOI)) {
// TODO(p): Handle Exifs independently--flush the last one.
if (data->mpf_offsets && *data->mpf_next)
if ((data->mpf_next || (data->mpf_next = data->mpf_offsets)) &&
*data->mpf_next)
return *data->mpf_next++;
if (p != end)
*o = add_warning(*o, "trailing data");
@ -1719,7 +1761,7 @@ parse_marker(uint8_t marker, const uint8_t *p, const uint8_t *end,
// http://fileformats.archiveteam.org/wiki/Multi-Picture_Format
if (marker == APP2 && p - payload >= 8 && !memcmp(payload, "MPF\0", 4)) {
payload += 4;
*o = parse_mpf(*o, data, payload, p - payload);
*o = parse_mpf(*o, &data->mpf_offsets, payload, p - payload);
}
// CIPA DC-006 (Stereo Still Image Format for Digital Cameras)
@ -1805,6 +1847,7 @@ parse_jpeg(jv o, const uint8_t *p, size_t len)
break;
}
if (*p++ != 0xFF || *p == 0) {
if (!data.ended)
o = add_error(o, "no marker found where one was expected");
break;
}