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new id3v2 muxer based on TagLib
Original commit message from CVS: 2006-03-09 Christophe Fergeau <teuf@gnome.org> reviewed by: Tim-Philipp Müller <tim at centricular dot net> * configure.ac: * ext/Makefile.am: * ext/taglib/Makefile.am: * ext/taglib/gsttaglib.cc: * ext/taglib/gsttaglib.h: new id3v2 muxer based on TagLib
This commit is contained in:
Christophe Fergeau
Tim-Philipp Müller
parent
c874edd089
commit
1db1be1df8
2 changed files with 508 additions and 0 deletions
446
gst-libs/gst/tag/gsttagmux.c
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446
gst-libs/gst/tag/gsttagmux.c
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/*
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* (c) 2006 Christophe Fergeau <teuf@gnome.org>
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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 <string.h>
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#include <textidentificationframe.h>
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#include <id3v2tag.h>
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#include <gst/gsttagsetter.h>
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#include "gsttaglib.h"
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using namespace TagLib;
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GST_DEBUG_CATEGORY_STATIC (gst_tag_lib_mux_debug);
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#define GST_CAT_DEFAULT gst_tag_lib_mux_debug
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static void
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gst_tag_lib_mux_iface_init (GType taglib_type)
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{
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static const GInterfaceInfo tag_setter_info = {
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NULL,
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NULL,
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NULL
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};
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g_type_add_interface_static (taglib_type, GST_TYPE_TAG_SETTER,
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&tag_setter_info);
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}
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GST_BOILERPLATE_FULL (GstTagLibMux, gst_tag_lib_mux,
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GstElement, GST_TYPE_ELEMENT, gst_tag_lib_mux_iface_init);
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static GstStateChangeReturn
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gst_tag_lib_mux_change_state (GstElement * element, GstStateChange transition);
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static GstFlowReturn gst_tag_lib_mux_chain (GstPad * pad, GstBuffer * buffer);
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static gboolean gst_tag_lib_mux_sink_event (GstPad * pad, GstEvent * event);
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static void
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gst_tag_lib_mux_finalize (GObject * obj)
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{
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GstTagLibMux *taglib = GST_TAGLIB_MUX (obj);
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if (taglib->tags) {
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gst_tag_list_free (taglib->tags);
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taglib->tags = NULL;
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}
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G_OBJECT_CLASS (parent_class)->finalize (obj);
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}
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static GstStaticPadTemplate gst_tag_lib_mux_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/mpeg"));
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static GstStaticPadTemplate gst_tag_lib_mux_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("application/x-id3"));
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static void
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gst_tag_lib_mux_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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static GstElementDetails gst_tag_lib_mux_details = {
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"TagLib ID3 Muxer",
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"Formatter/Metadata",
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"Adds an ID3v2 header to the beginning of MP3 files",
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"Christophe Fergeau <teuf@gnome.org>"
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};
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_tag_lib_mux_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_tag_lib_mux_sink_template));
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gst_element_class_set_details (element_class, &gst_tag_lib_mux_details);
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}
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static void
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gst_tag_lib_mux_class_init (GstTagLibMuxClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_tag_lib_mux_finalize);
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_tag_lib_mux_change_state);
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}
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static void
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gst_tag_lib_mux_init (GstTagLibMux * taglib,
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GstTagLibMuxClass * taglibmux_class)
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{
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GstElementClass *klass = GST_ELEMENT_CLASS (taglibmux_class);
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/* pad through which data comes in to the element */
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taglib->sinkpad =
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gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
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"sink"), "sink");
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gst_pad_set_setcaps_function (taglib->sinkpad,
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GST_DEBUG_FUNCPTR (gst_pad_proxy_setcaps));
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gst_pad_set_chain_function (taglib->sinkpad,
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GST_DEBUG_FUNCPTR (gst_tag_lib_mux_chain));
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gst_pad_set_event_function (taglib->sinkpad,
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GST_DEBUG_FUNCPTR (gst_tag_lib_mux_sink_event));
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gst_element_add_pad (GST_ELEMENT (taglib), taglib->sinkpad);
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/* pad through which data goes out of the element */
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taglib->srcpad =
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gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
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"src"), "src");
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gst_element_add_pad (GST_ELEMENT (taglib), taglib->srcpad);
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taglib->render_tag = TRUE;
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}
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static void
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add_one_tag (const GstTagList * list, const gchar * tag, gpointer user_data)
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{
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ID3v2::Tag * id3v2tag = (ID3v2::Tag *) user_data;
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gboolean result;
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/* FIXME: if there are several values set for the same tag, this won't
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* work, only the first value will be taken into account
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*/
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if (strcmp (tag, GST_TAG_TITLE) == 0) {
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char *title;
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result = gst_tag_list_get_string_index (list, tag, 0, &title);
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if (result != FALSE) {
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GST_DEBUG ("Setting title to %s", title);
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id3v2tag->setTitle (String::String (title, String::UTF8));
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}
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g_free (title);
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} else if (strcmp (tag, GST_TAG_ALBUM) == 0) {
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char *album;
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result = gst_tag_list_get_string_index (list, tag, 0, &album);
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if (result != FALSE) {
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GST_DEBUG ("Setting album to %s", album);
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id3v2tag->setAlbum (String::String (album, String::UTF8));
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}
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g_free (album);
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} else if (strcmp (tag, GST_TAG_ARTIST) == 0) {
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char *artist;
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result = gst_tag_list_get_string_index (list, tag, 0, &artist);
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if (result != FALSE) {
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GST_DEBUG ("Setting artist to %s", artist);
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id3v2tag->setArtist (String::String (artist, String::UTF8));
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}
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g_free (artist);
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} else if (strcmp (tag, GST_TAG_GENRE) == 0) {
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char *genre;
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result = gst_tag_list_get_string_index (list, tag, 0, &genre);
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if (result != FALSE) {
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GST_DEBUG ("Setting genre to %s", genre);
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id3v2tag->setGenre (String::String (genre, String::UTF8));
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}
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g_free (genre);
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} else if (strcmp (tag, GST_TAG_COMMENT) == 0) {
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char *comment;
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result = gst_tag_list_get_string_index (list, tag, 0, &comment);
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if (result != FALSE) {
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GST_DEBUG ("Setting comment to %s", comment);
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id3v2tag->setComment (String::String (comment, String::UTF8));
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}
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g_free (comment);
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} else if (strcmp (tag, GST_TAG_DATE) == 0) {
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GDate *date;
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result = gst_tag_list_get_date_index (list, tag, 0, &date);
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if (result != FALSE) {
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GDateYear year;
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year = g_date_get_year (date);
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GST_DEBUG ("Setting track year to %d", year);
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id3v2tag->setYear (year);
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g_date_free (date);
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}
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} else if (strcmp (tag, GST_TAG_TRACK_NUMBER) == 0) {
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guint track_number;
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result = gst_tag_list_get_uint_index (list, tag, 0, &track_number);
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if (result != FALSE) {
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guint total_tracks;
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result = gst_tag_list_get_uint_index (list, GST_TAG_TRACK_COUNT,
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0, &total_tracks);
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if (result) {
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gchar *tag_str;
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ID3v2::TextIdentificationFrame * frame;
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frame = new ID3v2::TextIdentificationFrame ("TRCK", String::UTF8);
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tag_str = g_strdup_printf ("%d/%d", track_number, total_tracks);
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GST_DEBUG ("Setting track number to %s", tag_str);
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id3v2tag->addFrame (frame);
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frame->setText (tag_str);
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g_free (tag_str);
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} else {
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GST_DEBUG ("Setting track number to %d", track_number);
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id3v2tag->setTrack (track_number);
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}
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}
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} else if (strcmp (tag, GST_TAG_ALBUM_VOLUME_NUMBER) == 0) {
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guint volume_number;
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result = gst_tag_list_get_uint_index (list, tag, 0, &volume_number);
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if (result != FALSE) {
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guint volume_count;
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gchar *tag_str;
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ID3v2::TextIdentificationFrame * frame;
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frame = new ID3v2::TextIdentificationFrame ("TRCK", String::UTF8);
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result = gst_tag_list_get_uint_index (list, GST_TAG_ALBUM_VOLUME_COUNT,
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0, &volume_count);
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if (result) {
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tag_str = g_strdup_printf ("%d/%d", volume_number, volume_count);
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} else {
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tag_str = g_strdup_printf ("%d", volume_number);
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}
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id3v2tag->addFrame (frame);
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frame->setText (tag_str);
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g_free (tag_str);
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GST_DEBUG ("Setting track number to %s", tag_str);
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}
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} else {
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GST_WARNING ("Unsupported tag: %s", tag);
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}
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}
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static GstBuffer *
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gst_tag_lib_mux_render_tag (GstTagLibMux * taglib)
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{
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ID3v2::Tag id3v2tag;
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ByteVector rendered_tag;
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GstBuffer *buffer;
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GstTagSetter *tagsetter = GST_TAG_SETTER (taglib);
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GstTagList *taglist;
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GstEvent *event;
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if (taglib->tags != NULL) {
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taglist = gst_tag_list_copy (taglib->tags);
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} else {
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taglist = gst_tag_list_new ();
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}
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if (gst_tag_setter_get_tag_list (tagsetter)) {
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gst_tag_list_insert (taglist,
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gst_tag_setter_get_tag_list (tagsetter),
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gst_tag_setter_get_tag_merge_mode (tagsetter));
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}
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/* Render the tag */
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gst_tag_list_foreach (taglist, add_one_tag, &id3v2tag);
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rendered_tag = id3v2tag.render ();
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taglib->tag_size = rendered_tag.size ();
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buffer = gst_buffer_new_and_alloc (rendered_tag.size ());
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memcpy (GST_BUFFER_DATA (buffer), rendered_tag.data (), rendered_tag.size ());
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gst_buffer_set_caps (buffer, GST_PAD_CAPS (taglib->srcpad));
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/* gst_util_dump_mem (GST_BUFFER_DATA (buffer), rendered_tag.size()); */
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/* Send an event about the new tags to downstream elements */
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/* gst_event_new_tag takes ownership of the list, so no need to unref it */
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event = gst_event_new_tag (taglist);
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gst_pad_push_event (taglib->srcpad, event);
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return buffer;
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}
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static GstFlowReturn
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gst_tag_lib_mux_chain (GstPad * pad, GstBuffer * buffer)
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{
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GstTagLibMux *taglib = GST_TAGLIB_MUX (GST_OBJECT_PARENT (pad));
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if (taglib->render_tag) {
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GstFlowReturn ret;
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GST_INFO ("Adding tags to stream");
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ret = gst_pad_push (taglib->srcpad, gst_tag_lib_mux_render_tag (taglib));
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if (ret != GST_FLOW_OK) {
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gst_buffer_unref (buffer);
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return ret;
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}
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taglib->render_tag = FALSE;
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}
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gst_buffer_set_caps (buffer, GST_PAD_CAPS (taglib->srcpad));
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return gst_pad_push (taglib->srcpad, buffer);
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}
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static gboolean
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gst_tag_lib_mux_sink_event (GstPad * pad, GstEvent * event)
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{
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GstTagLibMux *taglib;
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gboolean result;
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taglib = GST_TAGLIB_MUX (gst_pad_get_parent (pad));
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result = FALSE;
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_TAG:
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{
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GstTagList *tags;
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GST_INFO ("Got tag event");
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gst_event_parse_tag (event, &tags);
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if (taglib->tags != NULL) {
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/* FIXME: which policy is the best here? PREPEND or something else? */
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gst_tag_list_insert (taglib->tags, tags, GST_TAG_MERGE_PREPEND);
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} else {
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taglib->tags = gst_tag_list_copy (tags);
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}
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/* We'll push a new tag event in render_tag */
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gst_event_unref (event);
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result = TRUE;
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break;
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}
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case GST_EVENT_NEWSEGMENT:
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if (taglib->tag_size == 0) {
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result = gst_pad_push_event (taglib->srcpad, event);
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} else {
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gboolean update;
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gdouble rate;
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GstFormat format;
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gint64 value, end_value, base;
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gst_event_parse_new_segment (event, &update, &rate, &format,
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&value, &end_value, &base);
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gst_event_unref (event);
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if (format == GST_FORMAT_BYTES && gst_pad_is_linked (taglib->srcpad)) {
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GstEvent *new_event;
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GST_INFO ("Adjusting NEW_SEGMENT event by %d", taglib->tag_size);
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value += taglib->tag_size;
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if (end_value != -1) {
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end_value += taglib->tag_size;
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}
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new_event = gst_event_new_new_segment (update, rate, format,
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value, end_value, base);
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result = gst_pad_push_event (taglib->srcpad, new_event);
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} else {
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result = FALSE;
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}
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}
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break;
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default:
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result = gst_pad_event_default (pad, event);
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break;
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}
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gst_object_unref (GST_OBJECT (taglib));
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return result;
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}
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static GstStateChangeReturn
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gst_tag_lib_mux_change_state (GstElement * element, GstStateChange transition)
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{
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GstTagLibMux *taglib;
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GstStateChangeReturn result;
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taglib = GST_TAGLIB_MUX (element);
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result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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if (result != GST_STATE_CHANGE_SUCCESS) {
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return result;
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}
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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if (taglib->tags) {
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gst_tag_list_free (taglib->tags);
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taglib->tags = NULL;
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}
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taglib->tag_size = 0;
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taglib->render_tag = TRUE;
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break;
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default:
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break;
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}
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return result;
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}
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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if (!gst_element_register (plugin, "tagid3v2mux", GST_RANK_NONE,
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GST_TYPE_TAGLIB_MUX))
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return FALSE;
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GST_DEBUG_CATEGORY_INIT (gst_tag_lib_mux_debug, "taglibmux", 0,
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"ID3 Tag Muxer");
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return TRUE;
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"taglibmux",
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"Tag-writing plug-in based on taglib",
|
||||
plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)
|
||||
62
gst-libs/gst/tag/gsttagmux.h
Normal file
62
gst-libs/gst/tag/gsttagmux.h
Normal file
|
|
@ -0,0 +1,62 @@
|
|||
/*
|
||||
* (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.
|
||||
*/
|
||||
|
||||
#ifndef GST_TAG_LIB_H
|
||||
#define GST_TAG_LIB_H
|
||||
|
||||
#include <gst/gst.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
typedef struct _GstTagLibMuxPriv GstTagLibMuxPriv;
|
||||
|
||||
/* Definition of structure storing data for this element. */
|
||||
typedef struct _GstTagLibMux {
|
||||
GstElement element;
|
||||
|
||||
GstPad *sinkpad, *srcpad;
|
||||
GstTagList *tags;
|
||||
gsize tag_size;
|
||||
gboolean render_tag;
|
||||
|
||||
} GstTagLibMux;
|
||||
|
||||
/* Standard definition defining a class for this element. */
|
||||
typedef struct _GstTagLibMuxClass {
|
||||
GstElementClass parent_class;
|
||||
} GstTagLibMuxClass;
|
||||
|
||||
/* Standard macros for defining types for this element. */
|
||||
#define GST_TYPE_TAGLIB_MUX \
|
||||
(gst_tag_lib_mux_get_type())
|
||||
#define GST_TAGLIB_MUX(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_TAGLIB_MUX,GstTagLibMux))
|
||||
#define GST_TAGLIB_MUX_CLASS(klass) \
|
||||
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_TAGLIB_MUX,GstTagLibMuxClass))
|
||||
#define GST_IS_TAGLIB_MUX(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_TAGLIB_MUX))
|
||||
#define GST_IS_TAGLIB_MUX_CLASS(obj) \
|
||||
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_TAGLIB_MUX))
|
||||
|
||||
/* Standard function returning type information. */
|
||||
GType gst_my_filter_get_type (void);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
#endif
|
||||
Loading…
Reference in a new issue