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Re: [Libexif-devel] Compiling from CVS
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From: Antonio S. <sc...@te...> - 2004-05-02 23:12:02
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At 17:47 2/5/2004, Lutz M=FCller wrote:
>On Thu, 2004-04-22 at 22:30, Antonio Scuri wrote:
> > 1) Would be very nice to have a function like:
> >
> > const char *
> > exif_tag_get_name_index (unsigned int i, ExifTag *tag)
>
>Why don't you scan like this:
>
>for (i =3D 0; i < 0xffff; i++)
> if (exif_tag_get_name (i) !=3D NULL)
> (...)
Because this is very inefficient. The function exif_tag_get_name has a=20
loop looking for tag "i" every time is called.
> > 5) I have to edit the function exif_entry_initialize from=
"exif-entry.c".
> > There are lots of uninitialized tags. I simply replace the function=20
> with my
> > version. Then saving exif tags in jpeg came back to normal.
>
>What is your version? Could you produce a patch against CVS?
I checkout from CVS before making those changes. I'm sending the=20
function attached. Just cut and paste.
Regards,
scuri
----------------------------------------------------------------
void
exif_entry_initialize (ExifEntry *e, ExifTag tag)
{
time_t t;
struct tm *tm;
ExifRational r;
ExifByteOrder o;
/* We need the byte order */
if (!e || !e->parent || e->data || !e->parent->parent)
return;
o =3D exif_data_get_byte_order (e->parent->parent);
e->tag =3D tag;
switch (tag) {
/* LONG, 1 component, no default */
case EXIF_TAG_PIXEL_X_DIMENSION:
case EXIF_TAG_PIXEL_Y_DIMENSION:
case EXIF_TAG_EXIF_IFD_POINTER:
case EXIF_TAG_GPS_INFO_IFD_POINTER:
case EXIF_TAG_INTEROPERABILITY_IFD_POINTER:
case EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH:
case EXIF_TAG_JPEG_INTERCHANGE_FORMAT:
e->components =3D 1;
e->format =3D EXIF_FORMAT_LONG;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
memset (e->data, 0, e->size);
break;
/* SHORT, 1 component, no default */
case EXIF_TAG_SUBJECT_LOCATION:
case EXIF_TAG_SENSING_METHOD:
case EXIF_TAG_PHOTOMETRIC_INTERPRETATION:
case EXIF_TAG_COMPRESSION:
case EXIF_TAG_EXPOSURE_MODE:
case EXIF_TAG_WHITE_BALANCE:
case EXIF_TAG_FOCAL_LENGTH_IN_35MM_FILM:
case EXIF_TAG_GAIN_CONTROL:
case EXIF_TAG_SUBJECT_DISTANCE_RANGE:
case EXIF_TAG_FLASH:
case EXIF_TAG_COLOR_SPACE:
/* SHORT, 1 component, default 0 */
case EXIF_TAG_IMAGE_WIDTH:
case EXIF_TAG_IMAGE_LENGTH:
case EXIF_TAG_EXPOSURE_PROGRAM:
case EXIF_TAG_LIGHT_SOURCE:
case EXIF_TAG_METERING_MODE:
case EXIF_TAG_CUSTOM_RENDERED:
case EXIF_TAG_SCENE_CAPTURE_TYPE:
case EXIF_TAG_CONTRAST:
case EXIF_TAG_SATURATION:
case EXIF_TAG_SHARPNESS:
e->components =3D 1;
e->format =3D EXIF_FORMAT_SHORT;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
exif_set_short (e->data, o, 0);
break;
/* SHORT, 1 component, default 1 */
case EXIF_TAG_ORIENTATION:
case EXIF_TAG_PLANAR_CONFIGURATION:
case EXIF_TAG_YCBCR_POSITIONING:
e->components =3D 1;
e->format =3D EXIF_FORMAT_SHORT;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
exif_set_short (e->data, o, 1);
break;
/* SHORT, 1 component, default 2 */
case EXIF_TAG_RESOLUTION_UNIT:
case EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT:
e->components =3D 1;
e->format =3D EXIF_FORMAT_SHORT;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
exif_set_short (e->data, o, 2);
break;
/* SHORT, 1 component, default 3 */
case EXIF_TAG_SAMPLES_PER_PIXEL:
e->components =3D 1;
e->format =3D EXIF_FORMAT_SHORT;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
exif_set_short (e->data, o, 3);
break;
case EXIF_TAG_BITS_PER_SAMPLE:
e->components =3D 3;
e->format =3D EXIF_FORMAT_SHORT;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
exif_set_short (e->data, o, 8);
exif_set_short (
e->data + exif_format_get_size (e->format),
o, 8);
exif_set_short (
e->data + 2 * exif_format_get_size (e->format),
o, 8);
break;
case EXIF_TAG_YCBCR_SUB_SAMPLING:
e->components =3D 2;
e->format =3D EXIF_FORMAT_SHORT;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
exif_set_short (e->data, o, 2);
exif_set_short (
e->data + exif_format_get_size (e->format),
o, 1);
break;
/* SHORT, any component, no default */
case EXIF_TAG_SUBJECT_AREA:
case EXIF_TAG_ISO_SPEED_RATINGS:
e->components =3D 0;
e->format =3D EXIF_FORMAT_SHORT;
e->size =3D 0;
e->data =3D 0;
break;
/* SRATIONAL, 1 component, no default */
case EXIF_TAG_EXPOSURE_BIAS_VALUE:
case EXIF_TAG_BRIGHTNESS_VALUE:
case EXIF_TAG_SHUTTER_SPEED_VALUE:
e->components =3D 1;
e->format =3D EXIF_FORMAT_SRATIONAL;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
memset (e->data, 0, e->size);
break;
/* RATIONAL, 1 component, no default */
case EXIF_TAG_EXPOSURE_TIME:
case EXIF_TAG_FOCAL_PLANE_X_RESOLUTION:
case EXIF_TAG_FOCAL_PLANE_Y_RESOLUTION:
case EXIF_TAG_EXPOSURE_INDEX:
case EXIF_TAG_FLASH_ENERGY:
case EXIF_TAG_FNUMBER:
case EXIF_TAG_FOCAL_LENGTH:
case EXIF_TAG_SUBJECT_DISTANCE:
case EXIF_TAG_MAX_APERTURE_VALUE:
case EXIF_TAG_APERTURE_VALUE:
case EXIF_TAG_COMPRESSED_BITS_PER_PIXEL:
case EXIF_TAG_PRIMARY_CHROMATICITIES:
case EXIF_TAG_DIGITAL_ZOOM_RATIO:
e->components =3D 1;
e->format =3D EXIF_FORMAT_RATIONAL;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
memset (e->data, 0, e->size);
break;
/* RATIONAL, 1 component, default 72/1 */
case EXIF_TAG_X_RESOLUTION:
case EXIF_TAG_Y_RESOLUTION:
e->components =3D 1;
e->format =3D EXIF_FORMAT_RATIONAL;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
r.numerator =3D 72;
r.denominator =3D 1;
exif_set_rational (e->data, o, r);
break;
/* RATIONAL, 2 components, no default */
case EXIF_TAG_WHITE_POINT:
e->components =3D 2;
e->format =3D EXIF_FORMAT_RATIONAL;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
memset (e->data, 0, e->size);
break;
/* RATIONAL, 6 components */
case EXIF_TAG_REFERENCE_BLACK_WHITE:
e->components =3D 6;
e->format =3D EXIF_FORMAT_RATIONAL;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
r.denominator =3D 1;
r.numerator =3D 0;
exif_set_rational (e->data, o, r);
r.numerator =3D 255;
exif_set_rational (
e->data + exif_format_get_size (e->format), o, r);
r.numerator =3D 0;
exif_set_rational (
e->data + 2 * exif_format_get_size (e->format), o,=
r);
r.numerator =3D 255;
exif_set_rational (
e->data + 3 * exif_format_get_size (e->format), o,=
r);
r.numerator =3D 0;
exif_set_rational (
e->data + 4 * exif_format_get_size (e->format), o,=
r);
r.numerator =3D 255;
exif_set_rational (
e->data + 5 * exif_format_get_size (e->format), o,=
r);
break;
/* EXIF_FORMAT_ASCII, 20 components, default current time */
case EXIF_TAG_DATE_TIME:
case EXIF_TAG_DATE_TIME_ORIGINAL:
case EXIF_TAG_DATE_TIME_DIGITIZED:
t =3D time (NULL);
tm =3D localtime (&t);
e->components =3D 20;
e->format =3D EXIF_FORMAT_ASCII;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
snprintf ((char *) e->data, e->size,
"%04i:%02i:%02i %02i:%02i:%02i",
tm->tm_year + 1900, tm->tm_mon,=
tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
break;
/* EXIF_FORMAT_ASCII, 13 components */
case EXIF_TAG_RELATED_SOUND_FILE:
e->components =3D 13;
e->format =3D EXIF_FORMAT_ASCII;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
break;
case EXIF_TAG_IMAGE_UNIQUE_ID:
e->components =3D 33;
e->format =3D EXIF_FORMAT_ASCII;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
break;
/* EXIF_FORMAT_ASCII, any components, no default */
case EXIF_TAG_SPECTRAL_SENSITIVITY:
case EXIF_TAG_SUB_SEC_TIME:
case EXIF_TAG_SUB_SEC_TIME_ORIGINAL:
case EXIF_TAG_SUB_SEC_TIME_DIGITIZED:
case EXIF_TAG_IMAGE_DESCRIPTION:
case EXIF_TAG_MAKE:
case EXIF_TAG_MODEL:
case EXIF_TAG_SOFTWARE:
case EXIF_TAG_ARTIST:
case EXIF_TAG_COPYRIGHT:
e->components =3D 0;
e->format =3D EXIF_FORMAT_ASCII;
e->size =3D 0;
e->data =3D 0;
break;
/* UNDEFINED, any components, no default */
case=20
EXIF_TAG_OECF:=20
case EXIF_TAG_SPATIAL_FREQUENCY_RESPONSE:
case EXIF_TAG_NEW_CFA_PATTERN:
case EXIF_TAG_DEVICE_SETTING_DESCRIPTION:
case EXIF_TAG_MAKER_NOTE:
case EXIF_TAG_USER_COMMENT:
e->components =3D 0;
e->format =3D EXIF_FORMAT_UNDEFINED;
e->size =3D 0;
e->data =3D 0;
break;
/* UNDEFINED, 1 component, default 1 */
case EXIF_TAG_SCENE_TYPE:
e->components =3D 1;
e->format =3D EXIF_FORMAT_UNDEFINED;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
e->data[0] =3D 0x01;
break;
/* UNDEFINED, 1 component, default 3 */
case EXIF_TAG_FILE_SOURCE:
e->components =3D 1;
e->format =3D EXIF_FORMAT_UNDEFINED;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
e->data[0] =3D 0x03;
break;
/* UNDEFINED, 4 components, default 0 1 0 0 */
case EXIF_TAG_FLASH_PIX_VERSION:
e->components =3D 4;
e->format =3D EXIF_FORMAT_UNDEFINED;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
memcpy (e->data, "0100", 4);
break;
/* UNDEFINED, 4 components, default 0 2 1 0 */
case EXIF_TAG_EXIF_VERSION:
e->components =3D 4;
e->format =3D EXIF_FORMAT_UNDEFINED;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
memcpy (e->data, "0210", 4);
break;
/* UNDEFINED, 4 components, no default */
case EXIF_TAG_COMPONENTS_CONFIGURATION:
e->components =3D 4;
e->format =3D EXIF_FORMAT_UNDEFINED;
e->size =3D exif_format_get_size (e->format) *=
e->components;
e->data =3D malloc (e->size);
break;
default:
break;
}
}
----------------------------------------------------------------
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