--- /dev/null
+/*
+ * (c) 2006 Christophe Fergeau <teuf@gnome.org>
+ *
+ * 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.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <textidentificationframe.h>
+#include <id3v2tag.h>
+#include <gst/gsttagsetter.h>
+#include "gsttaglib.h"
+
+using namespace TagLib;
+
+GST_DEBUG_CATEGORY_STATIC (gst_tag_lib_mux_debug);
+#define GST_CAT_DEFAULT gst_tag_lib_mux_debug
+
+static void
+gst_tag_lib_mux_iface_init (GType taglib_type)
+{
+ static const GInterfaceInfo tag_setter_info = {
+ NULL,
+ NULL,
+ NULL
+ };
+
+ g_type_add_interface_static (taglib_type, GST_TYPE_TAG_SETTER,
+ &tag_setter_info);
+}
+
+GST_BOILERPLATE_FULL (GstTagLibMux, gst_tag_lib_mux,
+ GstElement, GST_TYPE_ELEMENT, gst_tag_lib_mux_iface_init);
+
+
+static GstStateChangeReturn
+gst_tag_lib_mux_change_state (GstElement * element, GstStateChange transition);
+static GstFlowReturn gst_tag_lib_mux_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean gst_tag_lib_mux_sink_event (GstPad * pad, GstEvent * event);
+
+
+static void
+gst_tag_lib_mux_finalize (GObject * obj)
+{
+ GstTagLibMux *taglib = GST_TAGLIB_MUX (obj);
+
+ if (taglib->tags) {
+ gst_tag_list_free (taglib->tags);
+ taglib->tags = NULL;
+ }
+ G_OBJECT_CLASS (parent_class)->finalize (obj);
+}
+
+
+static GstStaticPadTemplate gst_tag_lib_mux_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/mpeg"));
+
+
+static GstStaticPadTemplate gst_tag_lib_mux_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("application/x-id3"));
+
+
+static void
+gst_tag_lib_mux_base_init (gpointer g_class)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+ static GstElementDetails gst_tag_lib_mux_details = {
+ "TagLib ID3 Muxer",
+ "Formatter/Metadata",
+ "Adds an ID3v2 header to the beginning of MP3 files",
+ "Christophe Fergeau <teuf@gnome.org>"
+ };
+
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_tag_lib_mux_src_template));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_tag_lib_mux_sink_template));
+ gst_element_class_set_details (element_class, &gst_tag_lib_mux_details);
+}
+
+static void
+gst_tag_lib_mux_class_init (GstTagLibMuxClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gstelement_class = (GstElementClass *) klass;
+
+ gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_tag_lib_mux_finalize);
+ gstelement_class->change_state =
+ GST_DEBUG_FUNCPTR (gst_tag_lib_mux_change_state);
+}
+
+static void
+gst_tag_lib_mux_init (GstTagLibMux * taglib,
+ GstTagLibMuxClass * taglibmux_class)
+{
+ GstElementClass *klass = GST_ELEMENT_CLASS (taglibmux_class);
+
+ /* pad through which data comes in to the element */
+ taglib->sinkpad =
+ gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
+ "sink"), "sink");
+ gst_pad_set_setcaps_function (taglib->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_pad_proxy_setcaps));
+ gst_pad_set_chain_function (taglib->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_tag_lib_mux_chain));
+ gst_pad_set_event_function (taglib->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_tag_lib_mux_sink_event));
+ gst_element_add_pad (GST_ELEMENT (taglib), taglib->sinkpad);
+
+ /* pad through which data goes out of the element */
+ taglib->srcpad =
+ gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
+ "src"), "src");
+ gst_element_add_pad (GST_ELEMENT (taglib), taglib->srcpad);
+
+ taglib->render_tag = TRUE;
+}
+
+static void
+add_one_tag (const GstTagList * list, const gchar * tag, gpointer user_data)
+{
+ ID3v2::Tag * id3v2tag = (ID3v2::Tag *) user_data;
+ gboolean result;
+
+ /* FIXME: if there are several values set for the same tag, this won't
+ * work, only the first value will be taken into account
+ */
+ if (strcmp (tag, GST_TAG_TITLE) == 0) {
+ char *title;
+
+ result = gst_tag_list_get_string_index (list, tag, 0, &title);
+ if (result != FALSE) {
+ GST_DEBUG ("Setting title to %s", title);
+ id3v2tag->setTitle (String::String (title, String::UTF8));
+ }
+ g_free (title);
+ } else if (strcmp (tag, GST_TAG_ALBUM) == 0) {
+ char *album;
+
+ result = gst_tag_list_get_string_index (list, tag, 0, &album);
+ if (result != FALSE) {
+ GST_DEBUG ("Setting album to %s", album);
+ id3v2tag->setAlbum (String::String (album, String::UTF8));
+ }
+ g_free (album);
+ } else if (strcmp (tag, GST_TAG_ARTIST) == 0) {
+ char *artist;
+
+ result = gst_tag_list_get_string_index (list, tag, 0, &artist);
+ if (result != FALSE) {
+ GST_DEBUG ("Setting artist to %s", artist);
+ id3v2tag->setArtist (String::String (artist, String::UTF8));
+ }
+ g_free (artist);
+ } else if (strcmp (tag, GST_TAG_GENRE) == 0) {
+ char *genre;
+
+ result = gst_tag_list_get_string_index (list, tag, 0, &genre);
+ if (result != FALSE) {
+ GST_DEBUG ("Setting genre to %s", genre);
+ id3v2tag->setGenre (String::String (genre, String::UTF8));
+ }
+ g_free (genre);
+ } else if (strcmp (tag, GST_TAG_COMMENT) == 0) {
+ char *comment;
+
+ result = gst_tag_list_get_string_index (list, tag, 0, &comment);
+ if (result != FALSE) {
+ GST_DEBUG ("Setting comment to %s", comment);
+ id3v2tag->setComment (String::String (comment, String::UTF8));
+ }
+ g_free (comment);
+ } else if (strcmp (tag, GST_TAG_DATE) == 0) {
+ GDate *date;
+
+ result = gst_tag_list_get_date_index (list, tag, 0, &date);
+ if (result != FALSE) {
+ GDateYear year;
+
+ year = g_date_get_year (date);
+ GST_DEBUG ("Setting track year to %d", year);
+ id3v2tag->setYear (year);
+ g_date_free (date);
+ }
+ } else if (strcmp (tag, GST_TAG_TRACK_NUMBER) == 0) {
+ guint track_number;
+
+ result = gst_tag_list_get_uint_index (list, tag, 0, &track_number);
+ if (result != FALSE) {
+ guint total_tracks;
+
+ result = gst_tag_list_get_uint_index (list, GST_TAG_TRACK_COUNT,
+ 0, &total_tracks);
+ if (result) {
+ gchar *tag_str;
+
+ ID3v2::TextIdentificationFrame * frame;
+
+ frame = new ID3v2::TextIdentificationFrame ("TRCK", String::UTF8);
+ tag_str = g_strdup_printf ("%d/%d", track_number, total_tracks);
+ GST_DEBUG ("Setting track number to %s", tag_str);
+ id3v2tag->addFrame (frame);
+ frame->setText (tag_str);
+ g_free (tag_str);
+ } else {
+ GST_DEBUG ("Setting track number to %d", track_number);
+ id3v2tag->setTrack (track_number);
+ }
+ }
+ } else if (strcmp (tag, GST_TAG_ALBUM_VOLUME_NUMBER) == 0) {
+ guint volume_number;
+
+ result = gst_tag_list_get_uint_index (list, tag, 0, &volume_number);
+
+ if (result != FALSE) {
+ guint volume_count;
+ gchar *tag_str;
+
+ ID3v2::TextIdentificationFrame * frame;
+
+ frame = new ID3v2::TextIdentificationFrame ("TRCK", String::UTF8);
+ result = gst_tag_list_get_uint_index (list, GST_TAG_ALBUM_VOLUME_COUNT,
+ 0, &volume_count);
+ if (result) {
+ tag_str = g_strdup_printf ("%d/%d", volume_number, volume_count);
+ } else {
+ tag_str = g_strdup_printf ("%d", volume_number);
+ }
+
+ id3v2tag->addFrame (frame);
+ frame->setText (tag_str);
+ g_free (tag_str);
+ GST_DEBUG ("Setting track number to %s", tag_str);
+ }
+ } else {
+ GST_WARNING ("Unsupported tag: %s", tag);
+ }
+}
+
+
+static GstBuffer *
+gst_tag_lib_mux_render_tag (GstTagLibMux * taglib)
+{
+ ID3v2::Tag id3v2tag;
+ ByteVector rendered_tag;
+ GstBuffer *buffer;
+ GstTagSetter *tagsetter = GST_TAG_SETTER (taglib);
+ GstTagList *taglist;
+ GstEvent *event;
+
+ if (taglib->tags != NULL) {
+ taglist = gst_tag_list_copy (taglib->tags);
+ } else {
+ taglist = gst_tag_list_new ();
+ }
+
+ if (gst_tag_setter_get_tag_list (tagsetter)) {
+ gst_tag_list_insert (taglist,
+ gst_tag_setter_get_tag_list (tagsetter),
+ gst_tag_setter_get_tag_merge_mode (tagsetter));
+ }
+
+
+ /* Render the tag */
+ gst_tag_list_foreach (taglist, add_one_tag, &id3v2tag);
+ rendered_tag = id3v2tag.render ();
+ taglib->tag_size = rendered_tag.size ();
+ buffer = gst_buffer_new_and_alloc (rendered_tag.size ());
+ memcpy (GST_BUFFER_DATA (buffer), rendered_tag.data (), rendered_tag.size ());
+ gst_buffer_set_caps (buffer, GST_PAD_CAPS (taglib->srcpad));
+ /* gst_util_dump_mem (GST_BUFFER_DATA (buffer), rendered_tag.size()); */
+
+ /* Send an event about the new tags to downstream elements */
+ /* gst_event_new_tag takes ownership of the list, so no need to unref it */
+ event = gst_event_new_tag (taglist);
+ gst_pad_push_event (taglib->srcpad, event);
+
+ return buffer;
+}
+
+
+static GstFlowReturn
+gst_tag_lib_mux_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstTagLibMux *taglib = GST_TAGLIB_MUX (GST_OBJECT_PARENT (pad));
+
+ if (taglib->render_tag) {
+ GstFlowReturn ret;
+
+ GST_INFO ("Adding tags to stream");
+ ret = gst_pad_push (taglib->srcpad, gst_tag_lib_mux_render_tag (taglib));
+ if (ret != GST_FLOW_OK) {
+ gst_buffer_unref (buffer);
+ return ret;
+ }
+ taglib->render_tag = FALSE;
+ }
+
+ gst_buffer_set_caps (buffer, GST_PAD_CAPS (taglib->srcpad));
+ return gst_pad_push (taglib->srcpad, buffer);
+}
+
+static gboolean
+gst_tag_lib_mux_sink_event (GstPad * pad, GstEvent * event)
+{
+ GstTagLibMux *taglib;
+ gboolean result;
+
+ taglib = GST_TAGLIB_MUX (gst_pad_get_parent (pad));
+ result = FALSE;
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_TAG:
+ {
+ GstTagList *tags;
+
+ GST_INFO ("Got tag event");
+
+ gst_event_parse_tag (event, &tags);
+ if (taglib->tags != NULL) {
+ /* FIXME: which policy is the best here? PREPEND or something else? */
+ gst_tag_list_insert (taglib->tags, tags, GST_TAG_MERGE_PREPEND);
+ } else {
+ taglib->tags = gst_tag_list_copy (tags);
+ }
+ /* We'll push a new tag event in render_tag */
+ gst_event_unref (event);
+ result = TRUE;
+ break;
+ }
+ case GST_EVENT_NEWSEGMENT:
+ if (taglib->tag_size == 0) {
+ result = gst_pad_push_event (taglib->srcpad, event);
+ } else {
+ gboolean update;
+ gdouble rate;
+ GstFormat format;
+ gint64 value, end_value, base;
+
+ gst_event_parse_new_segment (event, &update, &rate, &format,
+ &value, &end_value, &base);
+ gst_event_unref (event);
+ if (format == GST_FORMAT_BYTES && gst_pad_is_linked (taglib->srcpad)) {
+ GstEvent *new_event;
+
+ GST_INFO ("Adjusting NEW_SEGMENT event by %d", taglib->tag_size);
+ value += taglib->tag_size;
+ if (end_value != -1) {
+ end_value += taglib->tag_size;
+ }
+
+ new_event = gst_event_new_new_segment (update, rate, format,
+ value, end_value, base);
+ result = gst_pad_push_event (taglib->srcpad, new_event);
+ } else {
+ result = FALSE;
+ }
+ }
+ break;
+
+ default:
+ result = gst_pad_event_default (pad, event);
+ break;
+ }
+ gst_object_unref (GST_OBJECT (taglib));
+
+ return result;
+}
+
+
+static GstStateChangeReturn
+gst_tag_lib_mux_change_state (GstElement * element, GstStateChange transition)
+{
+ GstTagLibMux *taglib;
+ GstStateChangeReturn result;
+
+ taglib = GST_TAGLIB_MUX (element);
+
+ result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+ if (result != GST_STATE_CHANGE_SUCCESS) {
+ return result;
+ }
+
+ switch (transition) {
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ if (taglib->tags) {
+ gst_tag_list_free (taglib->tags);
+ taglib->tags = NULL;
+ }
+ taglib->tag_size = 0;
+ taglib->render_tag = TRUE;
+ break;
+ default:
+ break;
+ }
+
+ return result;
+}
+
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ if (!gst_element_register (plugin, "tagid3v2mux", GST_RANK_NONE,
+ GST_TYPE_TAGLIB_MUX))
+ return FALSE;
+
+ GST_DEBUG_CATEGORY_INIT (gst_tag_lib_mux_debug, "taglibmux", 0,
+ "ID3 Tag Muxer");
+
+ return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "taglibmux",
+ "Tag-writing plug-in based on taglib",
+ plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)
projects / platform / upstream / gst-plugins-good.git / commitdiff