Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Add draft support to retrieve Exif from HEIF file #13443

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Add draft support to retrieve Exif from HEIF file #13443

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
141 changes: 140 additions & 1 deletion ext/exif/exif.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1284,6 +1284,18 @@ typedef struct {
mn_offset_mode_t offset_mode;
} maker_note_type;

#define FOURCC(id) (((uint32_t)(id[0])<<24) | (id[1]<<16) | (id[2]<<8) | (id[3]))

typedef struct {
uint64_t size;
uint32_t type;
} isobmff_box_type;

typedef struct {
uint32_t offset;
uint32_t size;
} isobmff_item_pos_type;

/* Some maker notes (e.g. DJI info tag) require custom parsing */
#define REQUIRES_CUSTOM_PARSING NULL

Expand Down Expand Up @@ -4285,11 +4297,128 @@ static bool exif_process_IFD_in_TIFF(image_info_type *ImageInfo, size_t dir_offs
return result;
}

static int exif_isobmff_parse_box(unsigned char *buf, isobmff_box_type *box)
{
box->size = php_ifd_get32u(buf, 1);
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

is it supposed to be always little endian for heif?

buf += 4;
box->type = php_ifd_get32u(buf, 1);
if (box->size != 1) {
return 8;
}
buf += 4;
box->size = php_ifd_get64u(buf, 1);
return 16;
}

static void exif_isobmff_parse_meta(unsigned char *data, unsigned char *end, isobmff_item_pos_type *pos)
{
isobmff_box_type box, item;
unsigned char *box_offset, *p, *p2;
int header_size, exif_id = -1, version, item_count, i;

for (box_offset = data + 4; box_offset < end; box_offset += box.size) {
header_size = exif_isobmff_parse_box(box_offset, &box);
if (box.type == FOURCC("iinf")) {
p = box_offset + header_size;
version = p[0];
p += 4;
if (version < 2) {
item_count = php_ifd_get16u(p, 1);
p += 2;
} else {
item_count = php_ifd_get32u(p, 1);
p += 4;
}
for (i=0; i < item_count; i++) {
header_size = exif_isobmff_parse_box(p, &item);
if (!memcmp(p + header_size + 8, "Exif", 4)) {
exif_id = php_ifd_get16u(p + header_size + 4, 1);
break;
}
p += item.size;
}
if (exif_id < 0) {
break;
}
}
else if (box.type == FOURCC("iloc")) {
p = box_offset + header_size;
version = p[0];
p += 6;
if (version < 2) {
item_count = php_ifd_get16u(p, 1);
p += 2;
} else {
item_count = php_ifd_get32u(p, 1);
p += 4;
}
for (i=0, p2=p; i<item_count; i++, p2 += 16) {
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

CS: missing spaces before and after = and <

if (php_ifd_get16u(p2, 1) == exif_id) {
pos->offset = php_ifd_get32u(p2 + 8, 1);
pos->size = php_ifd_get32u(p2 + 12, 1);
break;
}
}
break;
}
}
}

static bool exif_scan_HEIF_header(image_info_type *ImageInfo, unsigned char *buf)
{
isobmff_box_type box;
isobmff_item_pos_type pos;
unsigned char *data;
off_t offset;
uint64_t limit;
int box_header_size, remain;
bool ret = false;

pos.size = 0;
for (offset = php_ifd_get32u(buf, 1); ImageInfo->FileSize > offset + 16; offset += box.size) {
if ((php_stream_seek(ImageInfo->infile, offset, SEEK_SET) < 0) ||
(exif_read_from_stream_file_looped(ImageInfo->infile, (char*)buf, 16) != 16)) {
break;
}
box_header_size = exif_isobmff_parse_box(buf, &box);
if (box.type == FOURCC("meta")) {
limit = box.size - box_header_size;
data = (unsigned char *)emalloc(limit);
remain = 16 - box_header_size;
if (remain) {
memcpy(data, buf + box_header_size, remain);
}
if (exif_read_from_stream_file_looped(ImageInfo->infile, (char*)(data + remain), limit - remain) == limit - remain) {
exif_isobmff_parse_meta(data, data + limit, &pos);
}
if ((pos.size) &&
(ImageInfo->FileSize >= pos.offset + pos.size) &&
(php_stream_seek(ImageInfo->infile, pos.offset + 2, SEEK_SET) >= 0)) {
if (limit >= pos.size - 2) {
limit = pos.size - 2;
} else {
limit = pos.size - 2;
efree(data);
data = (unsigned char *)emalloc(limit);
}
if (exif_read_from_stream_file_looped(ImageInfo->infile, (char*)data, limit) == limit) {
exif_process_APP1(ImageInfo, (char*)data, limit, pos.offset + 2);
ret = true;
}
}
efree(data);
break;
}
}

return ret;
}

/* {{{ exif_scan_FILE_header
* Parse the marker stream until SOS or EOI is seen; */
static bool exif_scan_FILE_header(image_info_type *ImageInfo)
{
unsigned char file_header[8];
unsigned char file_header[16];
bool ret = false;

ImageInfo->FileType = IMAGE_FILETYPE_UNKNOWN;
Expand Down Expand Up @@ -4338,6 +4467,16 @@ static bool exif_scan_FILE_header(image_info_type *ImageInfo)
} else {
exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid TIFF file");
}
} else if ((ImageInfo->FileSize > 12) &&
(!memcmp(file_header + 4, "ftyp", 4)) &&
(exif_read_from_stream_file_looped(ImageInfo->infile, (char*)(file_header + 8), 4) == 4) &&
((!memcmp(file_header + 8, "heic", 4)) || (!memcmp(file_header + 8, "heix", 4)) || (!memcmp(file_header + 8, "mif1", 4)))) {
if (exif_scan_HEIF_header(ImageInfo, file_header)) {
ImageInfo->FileType = IMAGE_FILETYPE_HEIF;
ret = true;
} else {
exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid HEIF file");
}
} else {
exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "File not supported");
return false;
Expand Down
145 changes: 145 additions & 0 deletions ext/exif/tests/exif028.phpt
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,145 @@
--TEST--
Check for exif_read_data, HEIF with IFD0 and EXIF data in Motorola byte-order.
--EXTENSIONS--
exif
--INI--
output_handler=
zlib.output_compression=0
--FILE--
<?php
var_dump(exif_read_data(__DIR__.'/../../standard/tests/image/test4pix.heic'));
?>
--EXPECTF--
array(53) {
["FileName"]=>
string(13) "test4pix.heic"
["FileDateTime"]=>
int(%d)
["FileSize"]=>
int(42199)
["FileType"]=>
int(20)
["MimeType"]=>
string(10) "image/heif"
["SectionsFound"]=>
string(19) "ANY_TAG, IFD0, EXIF"
["COMPUTED"]=>
array(3) {
["IsColor"]=>
int(0)
["ByteOrderMotorola"]=>
int(1)
["ApertureFNumber"]=>
string(5) "f/1.8"
}
["Make"]=>
string(5) "Apple"
["Model"]=>
string(26) "iPhone SE (3rd generation)"
["Orientation"]=>
int(1)
["XResolution"]=>
string(4) "72/1"
["YResolution"]=>
string(4) "72/1"
["ResolutionUnit"]=>
int(2)
["Software"]=>
string(6) "17.2.1"
["DateTime"]=>
string(19) "2024:02:21 16:03:50"
["HostComputer"]=>
string(26) "iPhone SE (3rd generation)"
["TileWidth"]=>
int(512)
["TileLength"]=>
int(512)
["Exif_IFD_Pointer"]=>
int(264)
["ExposureTime"]=>
string(4) "1/60"
["FNumber"]=>
string(3) "9/5"
["ExposureProgram"]=>
int(2)
["ISOSpeedRatings"]=>
int(200)
["ExifVersion"]=>
string(4) "0232"
["DateTimeOriginal"]=>
string(19) "2024:02:21 16:03:50"
["DateTimeDigitized"]=>
string(19) "2024:02:21 16:03:50"
["UndefinedTag:0x9010"]=>
string(6) "+08:00"
["UndefinedTag:0x9011"]=>
string(6) "+08:00"
["UndefinedTag:0x9012"]=>
string(6) "+08:00"
["ShutterSpeedValue"]=>
string(12) "159921/27040"
["ApertureValue"]=>
string(11) "54823/32325"
["BrightnessValue"]=>
string(11) "29968/13467"
["ExposureBiasValue"]=>
string(3) "0/1"
["MeteringMode"]=>
int(5)
["Flash"]=>
int(16)
["FocalLength"]=>
string(7) "399/100"
["SubjectLocation"]=>
array(4) {
[0]=>
int(1995)
[1]=>
int(1507)
[2]=>
int(2217)
[3]=>
int(1332)
}
["MakerNote"]=>
string(9) "Apple iOS"
["SubSecTimeOriginal"]=>
string(3) "598"
["SubSecTimeDigitized"]=>
string(3) "598"
["ColorSpace"]=>
int(65535)
["ExifImageWidth"]=>
int(4032)
["ExifImageLength"]=>
int(3024)
["SensingMethod"]=>
int(2)
["SceneType"]=>
string(1) ""
["ExposureMode"]=>
int(0)
["WhiteBalance"]=>
int(0)
["DigitalZoomRatio"]=>
string(7) "756/151"
["FocalLengthIn35mmFilm"]=>
int(140)
["UndefinedTag:0xA432"]=>
array(4) {
[0]=>
string(15) "4183519/1048501"
[1]=>
string(15) "4183519/1048501"
[2]=>
string(3) "9/5"
[3]=>
string(3) "9/5"
}
["UndefinedTag:0xA433"]=>
string(5) "Apple"
["UndefinedTag:0xA434"]=>
string(51) "iPhone SE (3rd generation) back camera 3.99mm f/1.8"
["UndefinedTag:0xA460"]=>
int(2)
}
5 changes: 5 additions & 0 deletions ext/standard/basic_functions.stub.php
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -666,6 +666,11 @@
* @cvalue IMAGE_FILETYPE_AVIF
*/
const IMAGETYPE_AVIF = UNKNOWN;
/**
* @var int
* @cvalue IMAGE_FILETYPE_HEIF
*/
const IMAGETYPE_HEIF = UNKNOWN;
/**
* @var int
* @cvalue IMAGE_FILETYPE_UNKNOWN
Expand Down
1 change: 1 addition & 0 deletions ext/standard/basic_functions_arginfo.h
View file
Open in desktop

Some generated files are not rendered by default. Learn more about how customized files appear on GitHub.

20 changes: 20 additions & 0 deletions ext/standard/image.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,10 @@ PHPAPI const char php_sig_iff[4] = {'F','O','R','M'};
PHPAPI const char php_sig_ico[4] = {(char)0x00, (char)0x00, (char)0x01, (char)0x00};
PHPAPI const char php_sig_riff[4] = {'R', 'I', 'F', 'F'};
PHPAPI const char php_sig_webp[4] = {'W', 'E', 'B', 'P'};
PHPAPI const char php_sig_ftyp[4] = {'f', 't', 'y', 'p'};
PHPAPI const char php_sig_mif1[4] = {'m', 'i', 'f', '1'};
PHPAPI const char php_sig_heic[4] = {'h', 'e', 'i', 'c'};
PHPAPI const char php_sig_heix[4] = {'h', 'e', 'i', 'x'};

/* REMEMBER TO ADD MIME-TYPE TO FUNCTION php_image_type_to_mime_type */
/* PCX must check first 64bytes and byte 0=0x0a and byte2 < 0x06 */
Expand Down Expand Up @@ -1249,6 +1253,8 @@ PHPAPI char * php_image_type_to_mime_type(int image_type)
return "image/webp";
case IMAGE_FILETYPE_AVIF:
return "image/avif";
case IMAGE_FILETYPE_HEIF:
return "image/heif";
default:
case IMAGE_FILETYPE_UNKNOWN:
return "application/octet-stream"; /* suppose binary format */
Expand Down Expand Up @@ -1334,6 +1340,10 @@ PHP_FUNCTION(image_type_to_extension)
case IMAGE_FILETYPE_AVIF:
imgext = ".avif";
break;
case IMAGE_FILETYPE_HEIF:
imgext = ".heif";
break;
break;
}

if (imgext) {
Expand Down Expand Up @@ -1418,6 +1428,11 @@ PHPAPI int php_getimagetype(php_stream *stream, const char *input, char *filetyp
return IMAGE_FILETYPE_JP2;
}

if (twelve_bytes_read && !memcmp(filetype + 4, php_sig_ftyp, 4) &&
(!memcmp(filetype + 8, php_sig_mif1, 4) || !memcmp(filetype + 8, php_sig_heic, 4) || !memcmp(filetype + 8, php_sig_heix, 4))) {
return IMAGE_FILETYPE_HEIF;
}

if (!php_stream_rewind(stream) && php_is_image_avif(stream)) {
return IMAGE_FILETYPE_AVIF;
}
Expand Down Expand Up @@ -1510,6 +1525,11 @@ static void php_getimagesize_from_stream(php_stream *stream, char *input, zval *
case IMAGE_FILETYPE_AVIF:
result = php_handle_avif(stream);
break;
case IMAGE_FILETYPE_HEIF:
if (!php_stream_rewind(stream)) {
result = php_handle_avif(stream);
}
break;
default:
case IMAGE_FILETYPE_UNKNOWN:
break;
Expand Down
1 change: 1 addition & 0 deletions ext/standard/php_image.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,7 @@ typedef enum
IMAGE_FILETYPE_ICO,
IMAGE_FILETYPE_WEBP,
IMAGE_FILETYPE_AVIF,
IMAGE_FILETYPE_HEIF,
/* WHEN EXTENDING: PLEASE ALSO REGISTER IN basic_function.stub.php */
IMAGE_FILETYPE_COUNT
} image_filetype;
Expand Down
Loading
Loading