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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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640 lines
21 KiB
C
640 lines
21 KiB
C
/* GStreamer non-core tag registration and tag utility functions
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* Copyright (C) 2005 Ross Burton <ross@burtonini.com>
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* Copyright (C) 2006-2008 Tim-Philipp Müller <tim centricular net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst-i18n-plugin.h>
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#include <gst/base/gsttypefindhelper.h>
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#include <gst/gst.h>
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#include "tag.h"
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#include <string.h>
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/**
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* SECTION:gsttag
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* @short_description: additional tag definitions for plugins and applications
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* @see_also: #GstTagList
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*
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* <refsect2>
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* <para>
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* Contains additional standardized GStreamer tag definitions for plugins
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* and applications, and functions to register them with the GStreamer
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* tag system.
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* </para>
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* </refsect2>
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*/
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#ifndef GST_DISABLE_GST_DEBUG
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#define GST_CAT_DEFAULT gst_tag_ensure_debug_category()
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static GstDebugCategory *
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gst_tag_ensure_debug_category (void)
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{
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static gsize cat_gonce = 0;
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if (g_once_init_enter (&cat_gonce)) {
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GstDebugCategory *cat = NULL;
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GST_DEBUG_CATEGORY_INIT (cat, "tag-tags", 0, "GstTag helper functions");
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g_once_init_leave (&cat_gonce, (gsize) cat);
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}
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return (GstDebugCategory *) cat_gonce;
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}
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#endif /* GST_DISABLE_GST_DEBUG */
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static gpointer
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gst_tag_register_tags_internal (gpointer unused)
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{
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#ifdef ENABLE_NLS
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GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
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LOCALEDIR);
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bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
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bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
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#endif
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/* musicbrainz tags */
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gst_tag_register (GST_TAG_MUSICBRAINZ_TRACKID, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("track ID"), _("MusicBrainz track ID"), NULL);
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gst_tag_register (GST_TAG_MUSICBRAINZ_ARTISTID, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("artist ID"), _("MusicBrainz artist ID"), NULL);
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gst_tag_register (GST_TAG_MUSICBRAINZ_ALBUMID, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("album ID"), _("MusicBrainz album ID"), NULL);
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gst_tag_register (GST_TAG_MUSICBRAINZ_ALBUMARTISTID, GST_TAG_FLAG_META,
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G_TYPE_STRING,
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_("album artist ID"), _("MusicBrainz album artist ID"), NULL);
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gst_tag_register (GST_TAG_MUSICBRAINZ_TRMID, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("track TRM ID"), _("MusicBrainz TRM ID"), NULL);
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/* CDDA tags */
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gst_tag_register (GST_TAG_CDDA_CDDB_DISCID, GST_TAG_FLAG_META,
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G_TYPE_STRING, "discid", "CDDB discid for metadata retrieval",
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gst_tag_merge_use_first);
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gst_tag_register (GST_TAG_CDDA_CDDB_DISCID_FULL, GST_TAG_FLAG_META,
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G_TYPE_STRING, "discid full",
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"CDDB discid for metadata retrieval (full)", gst_tag_merge_use_first);
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gst_tag_register (GST_TAG_CDDA_MUSICBRAINZ_DISCID, GST_TAG_FLAG_META,
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G_TYPE_STRING, "musicbrainz-discid",
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"Musicbrainz discid for metadata retrieval", gst_tag_merge_use_first);
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gst_tag_register (GST_TAG_CDDA_MUSICBRAINZ_DISCID_FULL, GST_TAG_FLAG_META,
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G_TYPE_STRING, "musicbrainz-discid-full",
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"Musicbrainz discid for metadata retrieval (full)",
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gst_tag_merge_use_first);
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/* photography tags */
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gst_tag_register (GST_TAG_CAPTURING_SHUTTER_SPEED, GST_TAG_FLAG_META,
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GST_TYPE_FRACTION, _("capturing shutter speed"),
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_("Shutter speed used when capturing an image, in seconds"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_FOCAL_RATIO, GST_TAG_FLAG_META,
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G_TYPE_DOUBLE, _("capturing focal ratio"),
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_("Focal ratio (f-number) used when capturing the image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_FOCAL_LENGTH, GST_TAG_FLAG_META,
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G_TYPE_DOUBLE, _("capturing focal length"),
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_("Focal length of the lens used capturing the image, in mm"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_DIGITAL_ZOOM_RATIO, GST_TAG_FLAG_META,
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G_TYPE_DOUBLE, _("capturing digital zoom ratio"),
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_("Digital zoom ratio used when capturing an image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_ISO_SPEED, GST_TAG_FLAG_META,
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G_TYPE_INT, _("capturing iso speed"),
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_("The ISO speed used when capturing an image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_EXPOSURE_PROGRAM, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("capturing exposure program"),
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_("The exposure program used when capturing an image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_EXPOSURE_MODE, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("capturing exposure mode"),
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_("The exposure mode used when capturing an image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_EXPOSURE_COMPENSATION, GST_TAG_FLAG_META,
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G_TYPE_DOUBLE, _("capturing exposure compensation"),
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_("The exposure compensation used when capturing an image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_SCENE_CAPTURE_TYPE, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("capturing scene capture type"),
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_("The scene capture mode used when capturing an image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_GAIN_ADJUSTMENT, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("capturing gain adjustment"),
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_("The overall gain adjustment applied on an image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_WHITE_BALANCE, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("capturing white balance"),
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_("The white balance mode set when capturing an image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_CONTRAST, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("capturing contrast"),
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_("The direction of contrast processing applied "
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"when capturing an image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_SATURATION, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("capturing saturation"),
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_("The direction of saturation processing applied when "
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"capturing an image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_SHARPNESS, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("capturing sharpness"),
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_("The direction of sharpness processing applied "
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"when capturing an image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_FLASH_FIRED, GST_TAG_FLAG_META,
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G_TYPE_BOOLEAN, _("capturing flash fired"),
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_("If the flash fired while capturing an image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_FLASH_MODE, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("capturing flash mode"),
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_("The selected flash mode while capturing an image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_METERING_MODE, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("capturing metering mode"),
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_("The metering mode used while determining exposure for capturing an"
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" image"), NULL);
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gst_tag_register (GST_TAG_CAPTURING_SOURCE, GST_TAG_FLAG_META,
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G_TYPE_STRING, _("capturing source"),
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_("The source or type of device used for the capture"), NULL);
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gst_tag_register (GST_TAG_IMAGE_HORIZONTAL_PPI, GST_TAG_FLAG_META,
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G_TYPE_DOUBLE, _("image horizontal ppi"),
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_("Media (image/video) intended horizontal pixel density in ppi"), NULL);
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gst_tag_register (GST_TAG_IMAGE_VERTICAL_PPI, GST_TAG_FLAG_META,
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G_TYPE_DOUBLE, _("image vertical ppi"),
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_("Media (image/video) intended vertical pixel density in ppi"), NULL);
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return NULL;
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}
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/* FIXME 0.11: rename this to gst_tag_init() or gst_tag_register_tags() or
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* even better: make tags auto-register themselves, either by defining them
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* to a wrapper func that does the initing, or by adding tag factories so
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* that the core can load+register tags automatically when needed. */
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/**
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* gst_tag_register_musicbrainz_tags
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*
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* Registers additional musicbrainz-specific tags with the GStreamer tag
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* system. Plugins and applications that use these tags should call this
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* function before using them. Can be called multiple times.
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*/
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void
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gst_tag_register_musicbrainz_tags (void)
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{
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static GOnce mb_once = G_ONCE_INIT;
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g_once (&mb_once, gst_tag_register_tags_internal, NULL);
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}
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static void
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register_tag_image_type_enum (GType * id)
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{
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static const GEnumValue image_types[] = {
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{GST_TAG_IMAGE_TYPE_NONE, "GST_TAG_IMAGE_TYPE_NONE", "none"},
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{GST_TAG_IMAGE_TYPE_UNDEFINED, "GST_TAG_IMAGE_TYPE_UNDEFINED", "undefined"},
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{GST_TAG_IMAGE_TYPE_FRONT_COVER, "GST_TAG_IMAGE_TYPE_FRONT_COVER",
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"front-cover"},
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{GST_TAG_IMAGE_TYPE_BACK_COVER, "GST_TAG_IMAGE_TYPE_BACK_COVER",
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"back-cover"},
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{GST_TAG_IMAGE_TYPE_LEAFLET_PAGE, "GST_TAG_IMAGE_TYPE_LEAFLET_PAGE",
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"leaflet-page"},
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{GST_TAG_IMAGE_TYPE_MEDIUM, "GST_TAG_IMAGE_TYPE_MEDIUM", "medium"},
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{GST_TAG_IMAGE_TYPE_LEAD_ARTIST, "GST_TAG_IMAGE_TYPE_LEAD_ARTIST",
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"lead-artist"},
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{GST_TAG_IMAGE_TYPE_ARTIST, "GST_TAG_IMAGE_TYPE_ARTIST", "artist"},
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{GST_TAG_IMAGE_TYPE_CONDUCTOR, "GST_TAG_IMAGE_TYPE_CONDUCTOR", "conductor"},
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{GST_TAG_IMAGE_TYPE_BAND_ORCHESTRA, "GST_TAG_IMAGE_TYPE_BAND_ORCHESTRA",
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"band-orchestra"},
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{GST_TAG_IMAGE_TYPE_COMPOSER, "GST_TAG_IMAGE_TYPE_COMPOSER", "composer"},
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{GST_TAG_IMAGE_TYPE_LYRICIST, "GST_TAG_IMAGE_TYPE_LYRICIST", "lyricist"},
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{GST_TAG_IMAGE_TYPE_RECORDING_LOCATION,
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"GST_TAG_IMAGE_TYPE_RECORDING_LOCATION",
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"recording-location"},
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{GST_TAG_IMAGE_TYPE_DURING_RECORDING, "GST_TAG_IMAGE_TYPE_DURING_RECORDING",
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"during-recording"},
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{GST_TAG_IMAGE_TYPE_DURING_PERFORMANCE,
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"GST_TAG_IMAGE_TYPE_DURING_PERFORMANCE",
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"during-performance"},
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{GST_TAG_IMAGE_TYPE_VIDEO_CAPTURE, "GST_TAG_IMAGE_TYPE_VIDEO_CAPTURE",
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"video-capture"},
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{GST_TAG_IMAGE_TYPE_FISH, "GST_TAG_IMAGE_TYPE_FISH", "fish"},
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{GST_TAG_IMAGE_TYPE_ILLUSTRATION, "GST_TAG_IMAGE_TYPE_ILLUSTRATION",
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"illustration"},
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{GST_TAG_IMAGE_TYPE_BAND_ARTIST_LOGO, "GST_TAG_IMAGE_TYPE_BAND_ARTIST_LOGO",
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"artist-logo"},
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{GST_TAG_IMAGE_TYPE_PUBLISHER_STUDIO_LOGO,
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"GST_TAG_IMAGE_TYPE_PUBLISHER_STUDIO_LOGO",
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"publisher-studio-logo"},
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{0, NULL, NULL}
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};
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*id = g_enum_register_static ("GstTagImageType", image_types);
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/* work around thread-safety issue with class creation in GLib */
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g_type_class_ref (*id);
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}
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GType
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gst_tag_image_type_get_type (void)
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{
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static GType id;
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static GOnce once = G_ONCE_INIT;
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g_once (&once, (GThreadFunc) register_tag_image_type_enum, &id);
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return id;
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}
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static inline gboolean
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gst_tag_image_type_is_valid (GstTagImageType type)
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{
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GEnumClass *klass;
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gboolean res;
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klass = g_type_class_ref (gst_tag_image_type_get_type ());
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res = (g_enum_get_value (klass, type) != NULL);
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g_type_class_unref (klass);
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return res;
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}
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/**
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* gst_tag_parse_extended_comment:
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* @ext_comment: an extended comment string, see #GST_TAG_EXTENDED_COMMENT
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* @key: return location for the comment description key, or NULL
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* @lang: return location for the comment ISO-639 language code, or NULL
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* @value: return location for the actual comment string, or NULL
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* @fail_if_no_key: whether to fail if strings are not in key=value form
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*
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* Convenience function to parse a GST_TAG_EXTENDED_COMMENT string and
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* separate it into its components.
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*
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* If successful, @key, @lang and/or @value will be set to newly allocated
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* strings that you need to free with g_free() when done. @key and @lang
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* may also be set to NULL by this function if there is no key or no language
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* code in the extended comment string.
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*
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* Returns: TRUE if the string could be parsed, otherwise FALSE
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*
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* Since: 0.10.10
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*/
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gboolean
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gst_tag_parse_extended_comment (const gchar * ext_comment, gchar ** key,
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gchar ** lang, gchar ** value, gboolean fail_if_no_key)
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{
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const gchar *div, *bop, *bcl;
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g_return_val_if_fail (ext_comment != NULL, FALSE);
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g_return_val_if_fail (g_utf8_validate (ext_comment, -1, NULL), FALSE);
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if (key)
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*key = NULL;
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if (lang)
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*lang = NULL;
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div = strchr (ext_comment, '=');
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bop = strchr (ext_comment, '[');
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bcl = strchr (ext_comment, ']');
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if (div == NULL) {
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if (fail_if_no_key)
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return FALSE;
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if (value)
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*value = g_strdup (ext_comment);
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return TRUE;
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}
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if (bop != NULL && bop < div) {
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if (bcl < bop || bcl > div)
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return FALSE;
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if (key)
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*key = g_strndup (ext_comment, bop - ext_comment);
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if (lang)
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*lang = g_strndup (bop + 1, bcl - bop - 1);
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} else {
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if (key)
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*key = g_strndup (ext_comment, div - ext_comment);
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}
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if (value)
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*value = g_strdup (div + 1);
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return TRUE;
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}
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/**
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* gst_tag_freeform_string_to_utf8:
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* @data: string data
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* @size: length of string data, or -1 if the string is NUL-terminated
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* @env_vars: a NULL-terminated string array of environment variable names,
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* or NULL
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*
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* Convenience function to read a string with unknown character encoding. If
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* the string is already in UTF-8 encoding, it will be returned right away.
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* If not it tries to detect byte-order-mark for UTF-16/32 cases and use that.
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* Otherwise, the environment will be searched for a number of environment
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* variables (whose names are specified in the NULL-terminated string array
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* @env_vars) containing a list of character encodings to try/use. If none
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* are specified, the current locale will be tried. If that also doesn't work,
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* WINDOWS-1252/ISO-8859-1 is assumed (which will almost always succeed).
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*
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* Returns: a newly-allocated string in UTF-8 encoding, or NULL
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*
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* Since: 0.10.13
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*/
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gchar *
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gst_tag_freeform_string_to_utf8 (const gchar * data, gint size,
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const gchar ** env_vars)
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{
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const gchar *cur_loc = NULL;
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gsize bytes_read;
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gchar *utf8 = NULL;
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g_return_val_if_fail (data != NULL, NULL);
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if (size < 0)
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size = strlen (data);
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/* chop off trailing string terminators to make sure utf8_validate doesn't
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* get to see them (since that would make the utf8 check fail) */
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while (size > 0 && data[size - 1] == '\0')
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--size;
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/* Should we try the charsets specified
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* via environment variables FIRST ? */
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if (g_utf8_validate (data, size, NULL)) {
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utf8 = g_strndup (data, size);
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GST_LOG ("String '%s' is valid UTF-8 already", utf8);
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goto beach;
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}
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/* check for and use byte-order-mark for UTF-16/32 cases */
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if (size >= 2) {
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const gchar *c = NULL;
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gint prefix, ssize;
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if (size >= 4) {
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prefix = 4;
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ssize = GST_ROUND_DOWN_4 (size - 4);
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switch (GST_READ_UINT32_BE (data)) {
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case 0x0000FEFF:
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c = "UTF-32BE";
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break;
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case 0xFFFE0000:
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c = "UTF-32LE";
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break;
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default:
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break;
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}
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}
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if (!c) {
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prefix = 2;
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ssize = GST_ROUND_DOWN_2 (size - 2);
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switch (GST_READ_UINT16_BE (data)) {
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case 0xFEFF:
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c = "UTF-16BE";
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break;
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case 0xFFFE:
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c = "UTF-16LE";
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break;
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default:
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break;
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}
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}
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if (c) {
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GST_LOG ("Trying to convert freeform string to UTF-8 from '%s'", c);
|
|
if ((utf8 =
|
|
g_convert (data + prefix, ssize, "UTF-8", c, &bytes_read, NULL,
|
|
NULL))) {
|
|
if (bytes_read == ssize)
|
|
goto beach;
|
|
g_free (utf8);
|
|
utf8 = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
while (env_vars && *env_vars != NULL) {
|
|
const gchar *env = NULL;
|
|
|
|
/* Try charsets specified via the environment */
|
|
env = g_getenv (*env_vars);
|
|
if (env != NULL && *env != '\0') {
|
|
gchar **c, **csets;
|
|
|
|
csets = g_strsplit (env, G_SEARCHPATH_SEPARATOR_S, -1);
|
|
|
|
for (c = csets; c && *c; ++c) {
|
|
GST_LOG ("Trying to convert freeform string to UTF-8 from '%s'", *c);
|
|
if ((utf8 =
|
|
g_convert (data, size, "UTF-8", *c, &bytes_read, NULL, NULL))) {
|
|
if (bytes_read == size) {
|
|
g_strfreev (csets);
|
|
goto beach;
|
|
}
|
|
g_free (utf8);
|
|
utf8 = NULL;
|
|
}
|
|
}
|
|
|
|
g_strfreev (csets);
|
|
}
|
|
++env_vars;
|
|
}
|
|
|
|
/* Try current locale (if not UTF-8) */
|
|
if (!g_get_charset (&cur_loc)) {
|
|
GST_LOG ("Trying to convert freeform string using locale ('%s')", cur_loc);
|
|
if ((utf8 = g_locale_to_utf8 (data, size, &bytes_read, NULL, NULL))) {
|
|
if (bytes_read == size) {
|
|
goto beach;
|
|
}
|
|
g_free (utf8);
|
|
utf8 = NULL;
|
|
}
|
|
}
|
|
|
|
/* Try Windows-1252 (which is a superset of ISO 8859-1 that uses a control
|
|
* character range in ISO 8859-1 for more printable characters) */
|
|
{
|
|
GError *err = NULL;
|
|
|
|
GST_LOG ("Trying to convert freeform string using Windows-1252/ISO-8859-1 "
|
|
"fallback");
|
|
utf8 = g_convert (data, size, "UTF-8", "WINDOWS-1252", &bytes_read, NULL,
|
|
&err);
|
|
if (err != NULL) {
|
|
/* fallback in case iconv implementation doesn't support windows-1252
|
|
* for some reason */
|
|
if (err->code == G_CONVERT_ERROR_NO_CONVERSION) {
|
|
utf8 = g_convert (data, size, "UTF-8", "ISO-8859-1", &bytes_read,
|
|
NULL, NULL);
|
|
}
|
|
g_error_free (err);
|
|
}
|
|
|
|
if (utf8 != NULL && bytes_read == size)
|
|
goto beach;
|
|
}
|
|
|
|
g_free (utf8);
|
|
return NULL;
|
|
|
|
beach:
|
|
|
|
g_strchomp (utf8);
|
|
if (utf8 && utf8[0] != '\0') {
|
|
GST_LOG ("Returning '%s'", utf8);
|
|
return utf8;
|
|
}
|
|
|
|
g_free (utf8);
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* gst_tag_image_data_to_image_buffer:
|
|
* @image_data: the (encoded) image
|
|
* @image_data_len: the length of the encoded image data at @image_data
|
|
* @image_type: type of the image, or #GST_TAG_IMAGE_TYPE_UNDEFINED. Pass
|
|
* #GST_TAG_IMAGE_TYPE_NONE if no image type should be set at all (e.g.
|
|
* for preview images)
|
|
*
|
|
* Helper function for tag-reading plugins to create a #GstBuffer suitable to
|
|
* add to a #GstTagList as an image tag (such as #GST_TAG_IMAGE or
|
|
* #GST_TAG_PREVIEW_IMAGE) from the encoded image data and an (optional) image
|
|
* type.
|
|
*
|
|
* Background: cover art and other images in tags are usually stored as a
|
|
* blob of binary image data, often accompanied by a MIME type or some other
|
|
* content type string (e.g. 'png', 'jpeg', 'jpg'). Sometimes there is also an
|
|
* 'image type' to indicate what kind of image this is (e.g. front cover,
|
|
* back cover, artist, etc.). The image data may also be an URI to the image
|
|
* rather than the image itself.
|
|
*
|
|
* In GStreamer, image tags are #GstBuffer<!-- -->s containing the raw image
|
|
* data, with the buffer caps describing the content type of the image
|
|
* (e.g. image/jpeg, image/png, text/uri-list). The buffer caps may contain
|
|
* an additional 'image-type' field of #GST_TYPE_TAG_IMAGE_TYPE to describe
|
|
* the type of image (front cover, back cover etc.). #GST_TAG_PREVIEW_IMAGE
|
|
* tags should not carry an image type, their type is already indicated via
|
|
* the special tag name.
|
|
*
|
|
* This function will do various checks and typefind the encoded image
|
|
* data (we can't trust the declared mime type).
|
|
*
|
|
* Returns: a newly-allocated image buffer for use in tag lists, or NULL
|
|
*
|
|
* Since: 0.10.20
|
|
*/
|
|
GstBuffer *
|
|
gst_tag_image_data_to_image_buffer (const guint8 * image_data,
|
|
guint image_data_len, GstTagImageType image_type)
|
|
{
|
|
const gchar *name;
|
|
GstBuffer *image;
|
|
GstCaps *caps;
|
|
guint8 *data;
|
|
|
|
g_return_val_if_fail (image_data != NULL, NULL);
|
|
g_return_val_if_fail (image_data_len > 0, NULL);
|
|
g_return_val_if_fail (gst_tag_image_type_is_valid (image_type), NULL);
|
|
|
|
GST_DEBUG ("image data len: %u bytes", image_data_len);
|
|
|
|
/* allocate space for a NUL terminator for an uri too */
|
|
image = gst_buffer_new_and_alloc (image_data_len + 1);
|
|
if (image == NULL)
|
|
goto alloc_failed;
|
|
|
|
data = gst_buffer_map (image, NULL, NULL, GST_MAP_WRITE);
|
|
memcpy (data, image_data, image_data_len);
|
|
data[image_data_len] = '\0';
|
|
gst_buffer_unmap (image, data, image_data_len + 1);
|
|
|
|
/* Find GStreamer media type, can't trust declared type */
|
|
caps = gst_type_find_helper_for_buffer (NULL, image, NULL);
|
|
|
|
if (caps == NULL)
|
|
goto no_type;
|
|
|
|
GST_DEBUG ("Found GStreamer media type: %" GST_PTR_FORMAT, caps);
|
|
|
|
/* sanity check: make sure typefound/declared caps are either URI or image */
|
|
name = gst_structure_get_name (gst_caps_get_structure (caps, 0));
|
|
|
|
if (!g_str_has_prefix (name, "image/") &&
|
|
!g_str_has_prefix (name, "video/") &&
|
|
!g_str_equal (name, "text/uri-list")) {
|
|
GST_DEBUG ("Unexpected image type '%s', ignoring image frame", name);
|
|
goto error;
|
|
}
|
|
|
|
/* Decrease size by 1 if we don't have an URI list
|
|
* to keep the original size of the image
|
|
*/
|
|
if (!g_str_equal (name, "text/uri-list"))
|
|
gst_buffer_set_size (image, image_data_len);
|
|
|
|
if (image_type != GST_TAG_IMAGE_TYPE_NONE) {
|
|
GST_LOG ("Setting image type: %d", image_type);
|
|
caps = gst_caps_make_writable (caps);
|
|
gst_caps_set_simple (caps, "image-type", GST_TYPE_TAG_IMAGE_TYPE,
|
|
image_type, NULL);
|
|
}
|
|
|
|
gst_buffer_set_caps (image, caps);
|
|
gst_caps_unref (caps);
|
|
return image;
|
|
|
|
/* ERRORS */
|
|
no_type:
|
|
{
|
|
GST_DEBUG ("Could not determine GStreamer media type, ignoring image");
|
|
/* fall through */
|
|
}
|
|
error:
|
|
{
|
|
if (image)
|
|
gst_buffer_unref (image);
|
|
if (caps)
|
|
gst_caps_unref (caps);
|
|
return NULL;
|
|
}
|
|
alloc_failed:
|
|
{
|
|
GST_WARNING ("failed to allocate buffer of %d for image", image_data_len);
|
|
gst_buffer_unref (image);
|
|
return NULL;
|
|
}
|
|
|
|
}
|