mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-25 07:48:19 +00:00
9f8cc91227
Original commit message from CVS: Changed a >= test to a > on the input buffer size in gst_tag_list_from_vorbiscomment_buffer. This was preventing the parsing of vorbiscomments not ending with a sync byte (which seems to happen in flac files)
588 lines
16 KiB
C
588 lines
16 KiB
C
/* GStreamer
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* Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
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*
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* gstvorbistagsetter.c: plugin for reading / modifying vorbis tags
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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/gsttaginterface.h>
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#include "gsttageditingprivate.h"
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#include <string.h>
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GST_DEBUG_CATEGORY_STATIC (gst_vorbis_tag_debug);
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#define GST_CAT_DEFAULT gst_vorbis_tag_debug
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#define GST_TYPE_VORBIS_TAG (gst_vorbis_tag_get_type())
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#define GST_VORBIS_TAG(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VORBIS_TAG, GstVorbisTag))
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#define GST_VORBIS_TAG_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VORBIS_TAG, GstVorbisTag))
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#define GST_IS_VORBIS_TAG(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VORBIS_TAG))
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#define GST_IS_VORBIS_TAG_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VORBIS_TAG))
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typedef struct _GstVorbisTag GstVorbisTag;
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typedef struct _GstVorbisTagClass GstVorbisTagClass;
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struct _GstVorbisTag {
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GstElement element;
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/* pads */
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GstPad * sinkpad;
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GstPad * srcpad;
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/* output mode */
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guint output;
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};
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struct _GstVorbisTagClass {
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GstElementClass parent_class;
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};
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/* elementfactory information */
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static GstElementDetails gst_vorbis_tag_details = GST_ELEMENT_DETAILS (
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"vorbis tag extractor",
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"Tag",
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"Extract tagging information from vorbis streams",
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"Benjamin Otte <in7y118@public.uni-hamburg.de>"
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);
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enum {
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OUTPUT_UNKNOWN,
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OUTPUT_TAGS,
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OUTPUT_DATA
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};
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/* signals and args */
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enum {
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/* FILL ME */
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LAST_SIGNAL
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};
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GST_PAD_TEMPLATE_FACTORY (vorbis_tag_src_template_factory,
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"src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_CAPS_NEW (
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"vorbis_tag_data_src",
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"audio/x-vorbis",
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NULL
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),
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GST_CAPS_NEW (
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"vorbis_tag_tag_src",
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"application/x-gst-tags",
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NULL
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)
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)
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GST_PAD_TEMPLATE_FACTORY (vorbis_tag_sink_template_factory,
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"sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_CAPS_NEW (
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"vorbis_tag_data_sink",
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"audio/x-vorbis",
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NULL
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)
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)
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static void gst_vorbis_tag_base_init (gpointer g_class);
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static void gst_vorbis_tag_class_init (gpointer g_class,
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gpointer class_data);
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static void gst_vorbis_tag_init (GTypeInstance * instance,
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gpointer g_class);
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static void gst_vorbis_tag_chain (GstPad * pad,
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GstData * data);
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static GstElementStateReturn gst_vorbis_tag_change_state (GstElement * element);
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static GstElementClass *parent_class = NULL;
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/* static guint gst_vorbis_tag_signals[LAST_SIGNAL] = { 0 }; */
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GType
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gst_vorbis_tag_get_type (void)
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{
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static GType vorbis_tag_type = 0;
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if (!vorbis_tag_type) {
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static const GTypeInfo vorbis_tag_info = {
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sizeof (GstVorbisTagClass),
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gst_vorbis_tag_base_init,
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NULL,
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gst_vorbis_tag_class_init,
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NULL,
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NULL,
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sizeof (GstVorbisTag),
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0,
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gst_vorbis_tag_init,
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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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vorbis_tag_type = g_type_register_static(GST_TYPE_ELEMENT, "GstVorbisTag", &vorbis_tag_info, 0);
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g_type_add_interface_static (vorbis_tag_type, GST_TYPE_TAG_SETTER, &tag_setter_info);
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GST_DEBUG_CATEGORY_INIT (gst_vorbis_tag_debug, "vorbistag", 0, "vorbis tagging element");
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}
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return vorbis_tag_type;
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}
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static void
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gst_vorbis_tag_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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gst_element_class_set_details (element_class, &gst_vorbis_tag_details);
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gst_element_class_add_pad_template (element_class,
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GST_PAD_TEMPLATE_GET (vorbis_tag_sink_template_factory));
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gst_element_class_add_pad_template (element_class,
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GST_PAD_TEMPLATE_GET (vorbis_tag_src_template_factory));
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}
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static void
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gst_vorbis_tag_class_init (gpointer g_class, gpointer class_data)
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
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parent_class = g_type_class_peek_parent (g_class);
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gstelement_class->change_state = gst_vorbis_tag_change_state;
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}
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static void
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gst_vorbis_tag_init (GTypeInstance *instance, gpointer g_class)
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{
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GstVorbisTag *tag = GST_VORBIS_TAG (instance);
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/* create the sink and src pads */
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tag->sinkpad = gst_pad_new_from_template(
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GST_PAD_TEMPLATE_GET (vorbis_tag_sink_template_factory), "sink");
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gst_element_add_pad (GST_ELEMENT (tag), tag->sinkpad);
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gst_pad_set_chain_function (tag->sinkpad, GST_DEBUG_FUNCPTR (gst_vorbis_tag_chain));
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tag->srcpad = gst_pad_new_from_template(
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GST_PAD_TEMPLATE_GET (vorbis_tag_src_template_factory), "src");
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gst_element_add_pad (GST_ELEMENT (tag), tag->srcpad);
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}
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static GstTagEntryMatch tag_matches[] = {
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{ GST_TAG_TITLE, "TITLE" },
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{ GST_TAG_VERSION, "VERSION" },
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{ GST_TAG_ALBUM, "ALBUM" },
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{ GST_TAG_TRACK_NUMBER,"TRACKNUMBER" },
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{ GST_TAG_ARTIST, "ARTIST" },
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{ GST_TAG_PERFORMER, "PERFORMER" },
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{ GST_TAG_COPYRIGHT, "COPYRIGHT" },
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{ GST_TAG_LICENSE, "LICENSE" },
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{ GST_TAG_ORGANIZATION,"ORGANIZATION" },
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{ GST_TAG_DESCRIPTION,"DESCRIPTION" },
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{ GST_TAG_GENRE, "GENRE" },
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{ GST_TAG_DATE, "DATE" },
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{ GST_TAG_CONTACT, "CONTACT" },
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{ GST_TAG_ISRC, "ISRC" },
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{ GST_TAG_COMMENT, "COMMENT" },
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{ NULL, NULL }
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};
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/**
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* gst_tag_from_vorbis_tag:
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* @vorbis_tag: vorbiscomment tag to convert to GStreamer tag
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*
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* Looks up the GStreamer tag for a vorbiscommment tag.
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*
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* Returns: The corresponding GStreamer tag or NULL if none exists.
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*/
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G_CONST_RETURN gchar *
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gst_tag_from_vorbis_tag (const gchar *vorbis_tag)
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{
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int i = 0;
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gchar *real_vorbis_tag;
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g_return_val_if_fail (vorbis_tag != NULL, NULL);
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real_vorbis_tag = g_ascii_strup (vorbis_tag, -1);
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while (tag_matches[i].gstreamer_tag != NULL) {
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if (strcmp (real_vorbis_tag, tag_matches[i].original_tag) == 0) {
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break;
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}
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i++;
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}
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g_free (real_vorbis_tag);
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return tag_matches[i].gstreamer_tag;
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}
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/**
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* gst_tag_to_vorbis_tag:
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* @gst_tag: GStreamer tag to convert to vorbiscomment tag
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*
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* Looks up the vorbiscommment tag for a GStreamer tag.
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*
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* Returns: The corresponding vorbiscommment tag or NULL if none exists.
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*/
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G_CONST_RETURN gchar *
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gst_tag_to_vorbis_tag (const gchar *gst_tag)
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{
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int i = 0;
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g_return_val_if_fail (gst_tag != NULL, NULL);
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while (tag_matches[i].gstreamer_tag != NULL) {
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if (strcmp (gst_tag, tag_matches[i].gstreamer_tag) == 0) {
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return tag_matches[i].original_tag;
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}
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i++;
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}
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return NULL;
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}
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void
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gst_vorbis_tag_add (GstTagList *list, const gchar *tag, const gchar *value)
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{
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const gchar *gst_tag = gst_tag_from_vorbis_tag (tag);
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if (gst_tag == NULL) return;
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switch (gst_tag_get_type (gst_tag)) {
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case G_TYPE_UINT:
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if (strcmp (gst_tag, GST_TAG_DATE) == 0) {
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GDate *date;
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guint y, d = 1, m = 1;
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gchar *check = (gchar *) value;
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y = strtoul (check, &check, 10);
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if (*check == '-') {
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check++;
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m = strtoul (check, &check, 10);
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if (*check == '-') {
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check++;
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d = strtoul (check, &check, 10);
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}
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}
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if (*check != '\0') break;
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if (y == 0) break;
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date = g_date_new_dmy (d, m, y);
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y = g_date_get_julian (date);
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g_date_free (date);
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gst_tag_list_add (list, GST_TAG_MERGE_APPEND, gst_tag, y, NULL);
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break;
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} else {
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guint tmp;
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gchar *check;
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tmp = strtoul (value, &check, 10);
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if (*check == '/' && strcmp (gst_tag, GST_TAG_TRACK_NUMBER) == 0) {
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guint count;
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check++;
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count = strtoul (check, &check, 10);
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if (*check != '\0' || count == 0) break;
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gst_tag_list_add (list, GST_TAG_MERGE_APPEND, GST_TAG_TRACK_COUNT, count, NULL);
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}
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if (*check != '\0') break;
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gst_tag_list_add (list, GST_TAG_MERGE_APPEND, gst_tag, tmp, NULL);
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}
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break;
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case G_TYPE_STRING:
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gst_tag_list_add (list, GST_TAG_MERGE_APPEND, gst_tag, value, NULL);
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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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/**
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* gst_tag_list_from_vorbiscomment_buffer:
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* @buffer: buffer to convert
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* @id_data: identification data at start of stream
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* @id_data_length: length of identification data
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* @ vendor_string: pointer to a string that should take the vendor string of this
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* vorbis comment or NULL if you don't need it.
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*
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* Creates a new tag list that contains the information parsed out of a
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* vorbiscomment packet.
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*
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* Returns: A new #GstTagList with all tags that could be extracted from the
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* given vorbiscomment buffer or NULL on error.
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*/
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GstTagList *
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gst_tag_list_from_vorbiscomment_buffer (const GstBuffer *buffer, const guint8 *id_data,
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const guint id_data_length, gchar **vendor_string)
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{
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#define ADVANCE(x) G_STMT_START{ \
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data += x; \
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size -= x; \
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if (size < 4) goto error; \
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cur_size = GUINT32_FROM_LE (*((guint32 *) data)); \
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data += 4; \
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size -= 4; \
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if (cur_size > size) goto error; \
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cur = data; \
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}G_STMT_END
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gchar *cur, *value;
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guint cur_size;
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guint iterations;
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guint8 *data;
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guint size;
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GstTagList *list;
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g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
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g_return_val_if_fail (id_data != NULL, NULL);
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g_return_val_if_fail (id_data_length > 0, NULL);
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data = GST_BUFFER_DATA (buffer);
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size = GST_BUFFER_SIZE (buffer);
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list = gst_tag_list_new ();
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if (size < 11) goto error;
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if (memcmp (data, id_data, id_data_length) != 0) goto error;
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ADVANCE (id_data_length);
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if (vendor_string) *vendor_string = g_strndup (cur, cur_size);
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ADVANCE (cur_size);
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iterations = cur_size;
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cur_size = 0;
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while (iterations) {
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ADVANCE (cur_size);
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iterations--;
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cur = g_strndup (cur, cur_size);
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value = strchr(cur, '=');
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if (value == NULL) {
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g_free (cur);
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continue;
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}
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*value = '\0';
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value++;
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if (!g_utf8_validate (value, -1, NULL)) {
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g_free (cur);
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continue;
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}
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gst_vorbis_tag_add (list, cur, value);
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g_free (cur);
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}
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return list;
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error:
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gst_tag_list_free (list);
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return NULL;
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}
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typedef struct {
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guint count;
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guint data_count;
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GList *entries;
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} MyForEach;
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GList *
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gst_tag_to_vorbis_comments (const GstTagList *list, const gchar *tag)
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{
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gchar *result;
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GList *l = NULL;
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guint i;
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const gchar *vorbis_tag = gst_tag_to_vorbis_tag (tag);
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if (!vorbis_tag) return NULL;
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for (i = 0; i < gst_tag_list_get_tag_size (list, tag); i++) {
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switch (gst_tag_get_type (tag)) {
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case G_TYPE_UINT:
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if (strcmp (tag, GST_TAG_DATE) == 0) {
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GDate *date;
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guint u;
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g_assert (gst_tag_list_get_uint_index (list, tag, i, &u));
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date = g_date_new_julian (u);
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/* vorbis suggests using ISO date formats */
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result = g_strdup_printf ("%s=%04d-%02d-%02d", vorbis_tag, (gint) g_date_get_year (date),
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(gint) g_date_get_month (date), (gint) g_date_get_day (date));
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g_date_free (date);
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} else {
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guint u;
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g_assert (gst_tag_list_get_uint_index (list, tag, i, &u));
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result = g_strdup_printf ("%s=%u", vorbis_tag, u);
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}
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break;
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case G_TYPE_STRING: {
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gchar *str;
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g_assert (gst_tag_list_get_string_index (list, tag, i, &str));
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result = g_strdup_printf ("%s=%s", vorbis_tag, str);
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break;
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}
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default:
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GST_DEBUG ("Couldn't write tag %s", tag);
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continue;
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}
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l = g_list_prepend (l, result);
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}
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return g_list_reverse (l);
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}
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static void
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write_one_tag (const GstTagList *list, const gchar *tag, gpointer user_data)
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{
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MyForEach *data = (MyForEach *) user_data;
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GList *comments;
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GList *it;
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comments = gst_tag_to_vorbis_comments (list, tag);
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for (it = comments; it != NULL; it = it->next) {
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gchar *result = it->data;
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data->count ++;
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data->data_count += strlen (result);
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data->entries = g_list_prepend (data->entries, result);
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}
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}
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/**
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* gst_tag_list_to_vorbiscomment_buffer:
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* @buffer: tag list to convert
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* @id_data: identification data at start of stream
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* @id_data_length: length of identification data
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* @ vendor_string: string that describes the vendor string or NULL
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*
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* Creates a new vorbiscomment buffer from a tag list.
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*
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* Returns: A new #GstBuffer containing a vorbiscomment buffer with all tags that
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* could be converted from the given tag list.
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*/
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GstBuffer *
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gst_tag_list_to_vorbiscomment_buffer (const GstTagList *list, const guint8 *id_data,
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const guint id_data_length, const gchar *vendor_string)
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{
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GstBuffer *buffer;
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guint8 *data;
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guint i;
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GList *l;
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MyForEach my_data = { 0, 0, NULL };
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guint vendor_len;
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int required_size;
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g_return_val_if_fail (GST_IS_TAG_LIST (list), NULL);
|
|
g_return_val_if_fail (id_data != NULL, NULL);
|
|
g_return_val_if_fail (id_data_length > 0, NULL);
|
|
|
|
if (vendor_string == NULL)
|
|
vendor_string = "GStreamer encoded vorbiscomment";
|
|
vendor_len = strlen (vendor_string);
|
|
required_size = id_data_length + 4 + vendor_len + 4 + 1;
|
|
gst_tag_list_foreach ((GstTagList *) list, write_one_tag, &my_data);
|
|
required_size += 4 * my_data.count + my_data.data_count;
|
|
buffer = gst_buffer_new_and_alloc (required_size);
|
|
data = GST_BUFFER_DATA (buffer);
|
|
memcpy (data, id_data, id_data_length);
|
|
data += id_data_length;
|
|
*((guint32 *) data) = GUINT32_TO_LE (vendor_len);
|
|
data += 4;
|
|
memcpy (data, vendor_string, vendor_len);
|
|
data += vendor_len;
|
|
l = my_data.entries = g_list_reverse (my_data.entries);
|
|
*((guint32 *) data) = GUINT32_TO_LE (my_data.count);
|
|
data += 4;
|
|
for (i = 0; i < my_data.count; i++) {
|
|
guint size;
|
|
gchar *cur;
|
|
|
|
g_assert (l != NULL);
|
|
cur = l->data;
|
|
l = g_list_next (l);
|
|
size = strlen (cur);
|
|
*((guint32 *) data) = GUINT32_TO_LE (size);
|
|
data += 4;
|
|
memcpy (data, cur, size);
|
|
data += size;
|
|
}
|
|
g_list_free (my_data.entries);
|
|
*data = 1;
|
|
|
|
return buffer;
|
|
}
|
|
static void
|
|
gst_vorbis_tag_chain (GstPad *pad, GstData *data)
|
|
{
|
|
GstVorbisTag *tag;
|
|
GstBuffer *buffer;
|
|
|
|
buffer = GST_BUFFER (data);
|
|
tag = GST_VORBIS_TAG (gst_pad_get_parent (pad));
|
|
|
|
if (tag->output == OUTPUT_UNKNOWN) {
|
|
/* caps nego */
|
|
do {
|
|
if (gst_pad_try_set_caps (tag->srcpad, GST_CAPS_NEW ("vorbis_tag_data_src", "audio/x-vorbis", NULL)) >= 0) {
|
|
tag->output = OUTPUT_DATA;
|
|
} else if (gst_pad_try_set_caps (tag->srcpad, GST_CAPS_NEW ("vorbis_tag_tag_src", "application/x-gst-tags", NULL)) >= 0) {
|
|
tag->output = OUTPUT_TAGS;
|
|
} else {
|
|
GstCaps *caps = gst_pad_template_get_caps (GST_PAD_TEMPLATE_GET (vorbis_tag_src_template_factory));
|
|
if (gst_pad_recover_caps_error (tag->srcpad, caps))
|
|
continue;
|
|
return;
|
|
}
|
|
} while (FALSE);
|
|
}
|
|
|
|
if (GST_BUFFER_SIZE (buffer) == 0)
|
|
gst_element_error (GST_ELEMENT (tag), "empty buffers are not allowed in vorbis data");
|
|
|
|
if (GST_BUFFER_DATA (buffer)[0] == 3) {
|
|
gchar *vendor;
|
|
GstTagList *list = gst_tag_list_from_vorbiscomment_buffer (buffer, "\003vorbis", 7, &vendor);
|
|
|
|
gst_data_unref (data);
|
|
if (list == NULL) {
|
|
gst_element_error (GST_ELEMENT (tag), "invalid data in vorbis comments");
|
|
return;
|
|
}
|
|
gst_element_found_tags_for_pad (GST_ELEMENT (tag), tag->srcpad, 0,
|
|
gst_tag_list_copy (list));
|
|
gst_tag_list_merge (list, gst_tag_setter_get_list (GST_TAG_SETTER (tag)), gst_tag_setter_get_merge_mode (GST_TAG_SETTER (tag)));
|
|
data = GST_DATA (gst_tag_list_to_vorbiscomment_buffer (list, "\003vorbis", 7, vendor));
|
|
gst_tag_list_free (list);
|
|
g_free (vendor);
|
|
}
|
|
|
|
if (tag->output == OUTPUT_DATA) {
|
|
gst_pad_push (tag->srcpad, data);
|
|
} else {
|
|
gst_data_unref (data);
|
|
}
|
|
}
|
|
static GstElementStateReturn
|
|
gst_vorbis_tag_change_state (GstElement *element)
|
|
{
|
|
GstVorbisTag *tag;
|
|
|
|
tag = GST_VORBIS_TAG (element);
|
|
|
|
switch (GST_STATE_TRANSITION (element)) {
|
|
case GST_STATE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_READY_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_PAUSED_TO_PLAYING:
|
|
/* do something to get out of the chain function faster */
|
|
break;
|
|
case GST_STATE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_PAUSED_TO_READY:
|
|
tag->output = OUTPUT_UNKNOWN;
|
|
break;
|
|
case GST_STATE_READY_TO_NULL:
|
|
break;
|
|
}
|
|
|
|
return parent_class->change_state (element);
|
|
}
|