Added gst-plugins-base-subtitles0.10-0.10.34 for Meego Harmattan 1.2

[mafwsubrenderer] / gst-plugins-base-subtitles0.10 / ext / vorbis / gstvorbistag.c

diff --git a/gst-plugins-base-subtitles0.10/ext/vorbis/gstvorbistag.c b/gst-plugins-base-subtitles0.10/ext/vorbis/gstvorbistag.c
new file mode 100644 (file)
index 0000000..8a2db41
--- /dev/null
+++ b/gst-plugins-base-subtitles0.10/ext/vorbis/gstvorbistag.c
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2006 James Livingston <doclivingston@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * SECTION:element-vorbistag
+ * @see_also: #oggdemux, #oggmux, #vorbisparse, #GstTagSetter
+ *
+ * The vorbistags element can change the tag contained within a raw
+ * vorbis stream. Specifically, it modifies the comments header packet
+ * of the vorbis stream.
+ *
+ * The element will also process the stream as the #vorbisparse element does
+ * so it can be used when remuxing an Ogg Vorbis stream, without additional
+ * elements.
+ *
+ * Applications can set the tags to write using the #GstTagSetter interface.
+ * Tags contained withing the vorbis bitstream will be picked up
+ * automatically (and merged according to the merge mode set via the tag
+ * setter interface).
+ *
+ * <refsect2>
+ * <title>Example pipelines</title>
+ * |[
+ * gst-launch -v filesrc location=foo.ogg ! oggdemux ! vorbistag ! oggmux ! filesink location=bar.ogg
+ * ]| This element is not useful with gst-launch, because it does not support
+ * setting the tags on a #GstTagSetter interface. Conceptually, the element
+ * will usually be used in this order though.
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <glib.h>
+#include <gst/tag/tag.h>
+#include <gst/gsttagsetter.h>
+
+#include <vorbis/codec.h>
+
+#include "gstvorbistag.h"
+
+
+GST_DEBUG_CATEGORY_EXTERN (vorbisparse_debug);
+#define GST_CAT_DEFAULT vorbisparse_debug
+
+static GstFlowReturn gst_vorbis_tag_parse_packet (GstVorbisParse * parse,
+    GstBuffer * buffer);
+
+#define _do_init(type)                                                          \
+  G_STMT_START{                                                                 \
+    static const GInterfaceInfo tag_setter_info = {                             \
+      NULL,                                                                     \
+      NULL,                                                                     \
+      NULL                                                                      \
+    };                                                                          \
+    g_type_add_interface_static (type, GST_TYPE_TAG_SETTER,                     \
+                                 &tag_setter_info);                             \
+  }G_STMT_END
+
+GST_BOILERPLATE_FULL (GstVorbisTag, gst_vorbis_tag, GstVorbisParse,
+    GST_TYPE_VORBIS_PARSE, _do_init);
+
+
+static void
+gst_vorbis_tag_base_init (gpointer g_class)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_set_details_simple (element_class,
+      "VorbisTag", "Formatter/Metadata",
+      "Retags vorbis streams", "James Livingston <doclivingston@gmail.com>");
+}
+
+static void
+gst_vorbis_tag_class_init (GstVorbisTagClass * klass)
+{
+  GstVorbisParseClass *vorbisparse_class = GST_VORBIS_PARSE_CLASS (klass);
+
+  vorbisparse_class->parse_packet = gst_vorbis_tag_parse_packet;
+}
+
+static void
+gst_vorbis_tag_init (GstVorbisTag * tagger, GstVorbisTagClass * g_class)
+{
+  /* nothing to do */
+}
+
+
+static GstFlowReturn
+gst_vorbis_tag_parse_packet (GstVorbisParse * parse, GstBuffer * buffer)
+{
+  GstTagList *old_tags, *new_tags;
+  const GstTagList *user_tags;
+  GstVorbisTag *tagger;
+  gchar *encoder = NULL;
+  GstBuffer *new_buf;
+
+  /* just pass everything except the comments packet */
+  if (GST_BUFFER_SIZE (buffer) >= 1 && GST_BUFFER_DATA (buffer)[0] != 0x03) {
+    return GST_VORBIS_PARSE_CLASS (parent_class)->parse_packet (parse, buffer);
+  }
+
+  tagger = GST_VORBIS_TAG (parse);
+
+  old_tags =
+      gst_tag_list_from_vorbiscomment_buffer (buffer, (guint8 *) "\003vorbis",
+      7, &encoder);
+  user_tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (tagger));
+
+  /* build new tag list */
+  new_tags = gst_tag_list_merge (user_tags, old_tags,
+      gst_tag_setter_get_tag_merge_mode (GST_TAG_SETTER (tagger)));
+  gst_tag_list_free (old_tags);
+
+  new_buf =
+      gst_tag_list_to_vorbiscomment_buffer (new_tags, (guint8 *) "\003vorbis",
+      7, encoder);
+  gst_buffer_copy_metadata (new_buf, buffer, GST_BUFFER_COPY_TIMESTAMPS);
+
+  gst_tag_list_free (new_tags);
+  g_free (encoder);
+  gst_buffer_unref (buffer);
+
+  return GST_VORBIS_PARSE_CLASS (parent_class)->parse_packet (parse, new_buf);
+}