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| <a href="#gst-plugins-base-libs-gsttagexif.synopsis" class="shortcut">Top</a> |
| | |
| <a href="#gst-plugins-base-libs-gsttagexif.description" class="shortcut">Description</a> |
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| <div class="refentry"> |
| <a name="gst-plugins-base-libs-gsttagexif"></a><div class="titlepage"></div> |
| <div class="refnamediv"><table width="100%"><tr> |
| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="gst-plugins-base-libs-gsttagexif.top_of_page"></a>gsttagexif</span></h2> |
| <p>gsttagexif — tag mappings and support functions for plugins |
| dealing with exif tags</p> |
| </td> |
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| <div class="refsynopsisdiv"> |
| <a name="gst-plugins-base-libs-gsttagexif.synopsis"></a><h2>Synopsis</h2> |
| <pre class="synopsis"> |
| #include <gst/tag/tag.h> |
| |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * <a class="link" href="gst-plugins-base-libs-gsttagexif.html#gst-tag-list-to-exif-buffer" title="gst_tag_list_to_exif_buffer ()">gst_tag_list_to_exif_buffer</a> (<em class="parameter"><code>const <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a> *taglist</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> byte_order</code></em>, |
| <em class="parameter"><code><span class="type">guint32</span> base_offset</code></em>); |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * <a class="link" href="gst-plugins-base-libs-gsttagexif.html#gst-tag-list-to-exif-buffer-with-tiff-header" title="gst_tag_list_to_exif_buffer_with_tiff_header ()">gst_tag_list_to_exif_buffer_with_tiff_header</a> |
| (<em class="parameter"><code>const <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a> *taglist</code></em>); |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstTagList.html#GstTagList"><span class="returnvalue">GstTagList</span></a> * <a class="link" href="gst-plugins-base-libs-gsttagexif.html#gst-tag-list-from-exif-buffer" title="gst_tag_list_from_exif_buffer ()">gst_tag_list_from_exif_buffer</a> (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> byte_order</code></em>, |
| <em class="parameter"><code><span class="type">guint32</span> base_offset</code></em>); |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstTagList.html#GstTagList"><span class="returnvalue">GstTagList</span></a> * <a class="link" href="gst-plugins-base-libs-gsttagexif.html#gst-tag-list-from-exif-buffer-with-tiff-header" title="gst_tag_list_from_exif_buffer_with_tiff_header ()">gst_tag_list_from_exif_buffer_with_tiff_header</a> |
| (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>); |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gsttagexif.description"></a><h2>Description</h2> |
| <p> |
| Contains utility function to parse <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a>s from exif |
| buffers and to create exif buffers from <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a>s |
| </p> |
| <p> |
| Note that next IFD fields on the created exif buffers are set to 0. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gsttagexif.details"></a><h2>Details</h2> |
| <div class="refsect2"> |
| <a name="gst-tag-list-to-exif-buffer"></a><h3>gst_tag_list_to_exif_buffer ()</h3> |
| <pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * gst_tag_list_to_exif_buffer (<em class="parameter"><code>const <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a> *taglist</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> byte_order</code></em>, |
| <em class="parameter"><code><span class="type">guint32</span> base_offset</code></em>);</pre> |
| <p> |
| Formats the tags in taglist on exif format. The resulting buffer contains |
| the tags IFD and is followed by the data pointed by the tag entries. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>taglist</code></em> :</span></p></td> |
| <td>The taglist</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>byte_order</code></em> :</span></p></td> |
| <td>byte order used in writing (G_LITTLE_ENDIAN or G_BIG_ENDIAN)</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>base_offset</code></em> :</span></p></td> |
| <td>Offset from the tiff header first byte</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>A GstBuffer containing the tag entries followed by the tag data</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-tag-list-to-exif-buffer-with-tiff-header"></a><h3>gst_tag_list_to_exif_buffer_with_tiff_header ()</h3> |
| <pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> * gst_tag_list_to_exif_buffer_with_tiff_header |
| (<em class="parameter"><code>const <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a> *taglist</code></em>);</pre> |
| <p> |
| Formats the tags in taglist into exif structure, a tiff header |
| is put in the beginning of the buffer. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>taglist</code></em> :</span></p></td> |
| <td>The taglist</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>A GstBuffer containing the data</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-tag-list-from-exif-buffer"></a><h3>gst_tag_list_from_exif_buffer ()</h3> |
| <pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstTagList.html#GstTagList"><span class="returnvalue">GstTagList</span></a> * gst_tag_list_from_exif_buffer (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> byte_order</code></em>, |
| <em class="parameter"><code><span class="type">guint32</span> base_offset</code></em>);</pre> |
| <p> |
| Parses the IFD and IFD tags data contained in the buffer and puts it |
| on a taglist. The base_offset is used to subtract from the offset in |
| the tag entries and be able to get the offset relative to the buffer |
| start |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td> |
| <td>The exif buffer</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>byte_order</code></em> :</span></p></td> |
| <td>byte order of the data</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>base_offset</code></em> :</span></p></td> |
| <td>Offset from the tiff header to this buffer</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>The parsed taglist</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-tag-list-from-exif-buffer-with-tiff-header"></a><h3>gst_tag_list_from_exif_buffer_with_tiff_header ()</h3> |
| <pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstTagList.html#GstTagList"><span class="returnvalue">GstTagList</span></a> * gst_tag_list_from_exif_buffer_with_tiff_header |
| (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>);</pre> |
| <p> |
| Parses the exif tags starting with a tiff header structure. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td> |
| <td>The exif buffer</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>The taglist</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gsttagexif.see-also"></a><h2>See Also</h2> |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a> |
| </div> |
| </div> |
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