Commit 603bb156 authored by Christophe Fergeau's avatar Christophe Fergeau
Browse files

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
parent 6b0cc540
plugin_LTLIBRARIES = libgsttaglib.la
libgsttaglib_la_SOURCES = gsttaglib.cc
libgsttaglib_la_CXXFLAGS = $(GST_CFLAGS) $(TAGLIB_CFLAGS)
libgsttaglib_la_LIBADD = $(GST_LIBS) $(TAGLIB_LIBS)
libgsttaglib_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = gsttaglib.h
#EXTRA_DIST = README
/*
* (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)
/*
* (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
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