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tag: Adds some basic photography tags

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Adds the following basic photography tags.

API: GST_TAG_CAPTURING_SHUTTER_SPEED
API: GST_TAG_CAPTURING_FOCAL_RATIO
API: GST_TAG_CAPTURING_FOCAL_LENGTH
API: GST_TAG_CAPTURING_DIGITAL_ZOOM_RATIO
API: GST_TAG_CAPTURING_ISO_SPEED

Fixes #626651
This commit is contained in:
Thiago Santos 2010-08-17 06:47:52 -03:00
parent 2ee9360cf6
commit 19cef39023
3 changed files with 73 additions and 0 deletions
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5
docs/libs/gst-plugins-base-libs-sections.txt
View file

@ -1634,6 +1634,11 @@ GST_TAG_CDDA_TRACK_TAGS
GST_TAG_CMML_CLIP
GST_TAG_CMML_HEAD
GST_TAG_CMML_STREAM
GST_TAG_CAPTURING_SHUTTER_SPEED
GST_TAG_CAPTURING_FOCAL_RATIO
GST_TAG_CAPTURING_FOCAL_LENGTH
GST_TAG_CAPTURING_DIGITAL_ZOOM_RATIO
GST_TAG_CAPTURING_ISO_SPEED
gst_tag_register_musicbrainz_tags
gst_tag_freeform_string_to_utf8
gst_tag_parse_extended_comment

47
gst-libs/gst/tag/tag.h
View file

@ -120,6 +120,53 @@ G_BEGIN_DECLS
*/
#define GST_TAG_CDDA_MUSICBRAINZ_DISCID_FULL "musicbrainz-discid-full"
/**
* GST_TAG_CAPTURING_SHUTTER_SPEED:
*
* Shutter speed used when capturing an image, in seconds. (fraction)
*
* Since: 0.10.31
*/
#define GST_TAG_CAPTURING_SHUTTER_SPEED "capturing-shutter-speed"
/**
* GST_TAG_CAPTURING_FOCAL_RATIO:
*
* Focal ratio (f-number) used when capturing an image. (double)
*
* The value stored is the denominator of the focal ratio (f-number).
* For example, if this tag value is 2, the focal ratio is f/2.
*
* Since: 0.10.31
*/
#define GST_TAG_CAPTURING_FOCAL_RATIO "capturing-focal-ratio"
/**
* GST_TAG_CAPTURING_FOCAL_LENGTH:
*
* Focal length used when capturing an image, in mm. (double)
*
* Since: 0.10.31
*/
#define GST_TAG_CAPTURING_FOCAL_LENGTH "capturing-focal-length"
/**
* GST_TAG_CAPTURING_DIGITAL_ZOOM_RATIO:
*
* Digital zoom ratio used when capturing an image. (double)
*
* Since: 0.10.31
*/
#define GST_TAG_CAPTURING_DIGITAL_ZOOM_RATIO "capturing-digital-zoom-ratio"
/**
* GST_TAG_CAPTURING_ISO_SPEED:
*
* ISO speed used when capturing an image. (integer)
*
* Since: 0.10.31
*/
#define GST_TAG_CAPTURING_ISO_SPEED "capturing-iso-speed"
/* additional information for image tags */

21
gst-libs/gst/tag/tags.c
View file

@ -85,6 +85,27 @@ gst_tag_register_tags_internal (gpointer unused)
"Musicbrainz discid for metadata retrieval (full)",
gst_tag_merge_use_first);
/* photography tags */
gst_tag_register (GST_TAG_CAPTURING_SHUTTER_SPEED, GST_TAG_FLAG_META,
GST_TYPE_FRACTION, _("capturing shutter speed"),
_("Shutter speed used when capturing an image, in seconds"), NULL);
gst_tag_register (GST_TAG_CAPTURING_FOCAL_RATIO, GST_TAG_FLAG_META,
G_TYPE_DOUBLE, _("capturing focal ratio"),
_("Focal ratio (f-number) used when capturing the image"), NULL);
gst_tag_register (GST_TAG_CAPTURING_FOCAL_LENGTH, GST_TAG_FLAG_META,
G_TYPE_DOUBLE, _("capturing focal length"),
_("Focal length of the lens used capturing the image, in mm"), NULL);
gst_tag_register (GST_TAG_CAPTURING_DIGITAL_ZOOM_RATIO, GST_TAG_FLAG_META,
G_TYPE_DOUBLE, _("capturing digital zoom ratio"),
_("Digital zoom ratio used when capturing an image"), NULL);
gst_tag_register (GST_TAG_CAPTURING_ISO_SPEED, GST_TAG_FLAG_META,
G_TYPE_INT, _("capturing iso speed"),
_("The ISO speed used when capturing an image"), NULL);
return NULL;
}