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gstreamer/gst/tags/gstvorbistag.c
Wim Taymans 1dae961cbf Plugin port to 0.9, ogg/theora playback should work in the seek example now. 
Original commit message from CVS:
Plugin port to 0.9, ogg/theora playback should work in the seek
example now.
Removed old examples.
Removed old oggvorbisenc, renamed rawvorbisenc to vorbisenc as
explained in 0.9 TODO doc.
2005-03-31 09:43:49 +00:00

673 lines
19 KiB
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Raw Blame History

/* GStreamer
* Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
*
* gstvorbistagsetter.c: plugin for reading / modifying vorbis tags
*
* 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 <gst/gsttaginterface.h>
#include "gsttageditingprivate.h"
#include <stdlib.h>
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (gst_vorbis_tag_debug);
#define GST_CAT_DEFAULT gst_vorbis_tag_debug
#define GST_TYPE_VORBIS_TAG (gst_vorbis_tag_get_type())
#define GST_VORBIS_TAG(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VORBIS_TAG, GstVorbisTag))
#define GST_VORBIS_TAG_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VORBIS_TAG, GstVorbisTag))
#define GST_IS_VORBIS_TAG(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VORBIS_TAG))
#define GST_IS_VORBIS_TAG_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VORBIS_TAG))
typedef struct _GstVorbisTag GstVorbisTag;
typedef struct _GstVorbisTagClass GstVorbisTagClass;
struct _GstVorbisTag
{
GstElement element;
/* pads */
GstPad *sinkpad;
GstPad *srcpad;
/* output mode */
guint output;
};
struct _GstVorbisTagClass
{
GstElementClass parent_class;
};
/* elementfactory information */
static GstElementDetails gst_vorbis_tag_details =
GST_ELEMENT_DETAILS ("vorbis tag extractor",
"Tag",
"Extract tagging information from vorbis streams",
"Benjamin Otte <in7y118@public.uni-hamburg.de>");
enum
{
OUTPUT_UNKNOWN,
OUTPUT_TAGS,
OUTPUT_DATA
};
/* signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
static GstStaticPadTemplate gst_vorbis_tag_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-vorbis; application/x-gst-tags")
);
static GstStaticPadTemplate gst_vorbis_tag_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-vorbis")
);
static void gst_vorbis_tag_base_init (gpointer g_class);
static void gst_vorbis_tag_class_init (gpointer g_class, gpointer class_data);
static void gst_vorbis_tag_init (GTypeInstance * instance, gpointer g_class);
static GstFlowReturn gst_vorbis_tag_chain (GstPad * pad, GstBuffer * buffer);
static GstElementStateReturn gst_vorbis_tag_change_state (GstElement * element);
static GstElementClass *parent_class = NULL;
/* static guint gst_vorbis_tag_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_vorbis_tag_get_type (void)
{
static GType vorbis_tag_type = 0;
if (!vorbis_tag_type) {
static const GTypeInfo vorbis_tag_info = {
sizeof (GstVorbisTagClass),
gst_vorbis_tag_base_init,
NULL,
gst_vorbis_tag_class_init,
NULL,
NULL,
sizeof (GstVorbisTag),
0,
gst_vorbis_tag_init,
};
static const GInterfaceInfo tag_setter_info = {
NULL,
NULL,
NULL
};
vorbis_tag_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstVorbisTag",
&vorbis_tag_info, 0);
g_type_add_interface_static (vorbis_tag_type, GST_TYPE_TAG_SETTER,
&tag_setter_info);
GST_DEBUG_CATEGORY_INIT (gst_vorbis_tag_debug, "vorbistag", 0,
"vorbis tagging element");
}
return vorbis_tag_type;
}
static void
gst_vorbis_tag_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_vorbis_tag_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_vorbis_tag_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_vorbis_tag_src_template));
}
static void
gst_vorbis_tag_class_init (gpointer g_class, gpointer class_data)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
parent_class = g_type_class_peek_parent (g_class);
gstelement_class->change_state = gst_vorbis_tag_change_state;
}
static void
gst_vorbis_tag_init (GTypeInstance * instance, gpointer g_class)
{
GstVorbisTag *tag = GST_VORBIS_TAG (instance);
/* create the sink and src pads */
tag->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_vorbis_tag_sink_template), "sink");
gst_element_add_pad (GST_ELEMENT (tag), tag->sinkpad);
gst_pad_set_chain_function (tag->sinkpad,
GST_DEBUG_FUNCPTR (gst_vorbis_tag_chain));
tag->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_vorbis_tag_src_template), "src");
gst_element_add_pad (GST_ELEMENT (tag), tag->srcpad);
}
static GstTagEntryMatch tag_matches[] = {
{GST_TAG_TITLE, "TITLE"},
{GST_TAG_VERSION, "VERSION"},
{GST_TAG_ALBUM, "ALBUM"},
{GST_TAG_TRACK_NUMBER, "TRACKNUMBER"},
{GST_TAG_ALBUM_VOLUME_NUMBER, "DISCNUMBER"},
{GST_TAG_TRACK_COUNT, "TRACKTOTAL"},
{GST_TAG_ALBUM_VOLUME_COUNT, "DISCTOTAL"},
{GST_TAG_ARTIST, "ARTIST"},
{GST_TAG_PERFORMER, "PERFORMER"},
{GST_TAG_COPYRIGHT, "COPYRIGHT"},
{GST_TAG_LICENSE, "LICENSE"},
{GST_TAG_ORGANIZATION, "ORGANIZATION"},
{GST_TAG_DESCRIPTION, "DESCRIPTION"},
{GST_TAG_GENRE, "GENRE"},
{GST_TAG_DATE, "DATE"},
{GST_TAG_CONTACT, "CONTACT"},
{GST_TAG_ISRC, "ISRC"},
{GST_TAG_COMMENT, "COMMENT"},
{GST_TAG_TRACK_GAIN, "REPLAYGAIN_TRACK_GAIN"},
{GST_TAG_TRACK_PEAK, "REPLAYGAIN_TRACK_PEAK"},
{GST_TAG_ALBUM_GAIN, "REPLAYGAIN_ALBUM_GAIN"},
{GST_TAG_ALBUM_PEAK, "REPLAYGAIN_ALBUM_PEAK"},
{NULL, NULL}
};
/**
* gst_tag_from_vorbis_tag:
* @vorbis_tag: vorbiscomment tag to convert to GStreamer tag
*
* Looks up the GStreamer tag for a vorbiscommment tag.
*
* Returns: The corresponding GStreamer tag or NULL if none exists.
*/
G_CONST_RETURN gchar *
gst_tag_from_vorbis_tag (const gchar * vorbis_tag)
{
int i = 0;
gchar *real_vorbis_tag;
g_return_val_if_fail (vorbis_tag != NULL, NULL);
real_vorbis_tag = g_ascii_strup (vorbis_tag, -1);
while (tag_matches[i].gstreamer_tag != NULL) {
if (strcmp (real_vorbis_tag, tag_matches[i].original_tag) == 0) {
break;
}
i++;
}
g_free (real_vorbis_tag);
return tag_matches[i].gstreamer_tag;
}
/**
* gst_tag_to_vorbis_tag:
* @gst_tag: GStreamer tag to convert to vorbiscomment tag
*
* Looks up the vorbiscommment tag for a GStreamer tag.
*
* Returns: The corresponding vorbiscommment tag or NULL if none exists.
*/
G_CONST_RETURN gchar *
gst_tag_to_vorbis_tag (const gchar * gst_tag)
{
int i = 0;
g_return_val_if_fail (gst_tag != NULL, NULL);
while (tag_matches[i].gstreamer_tag != NULL) {
if (strcmp (gst_tag, tag_matches[i].gstreamer_tag) == 0) {
return tag_matches[i].original_tag;
}
i++;
}
return NULL;
}
void
gst_vorbis_tag_add (GstTagList * list, const gchar * tag, const gchar * value)
{
const gchar *gst_tag = gst_tag_from_vorbis_tag (tag);
if (gst_tag == NULL)
return;
switch (gst_tag_get_type (gst_tag)) {
case G_TYPE_UINT:
if (strcmp (gst_tag, GST_TAG_DATE) == 0) {
GDate *date;
guint y, d = 1, m = 1;
gchar *check = (gchar *) value;
y = strtoul (check, &check, 10);
if (*check == '-') {
check++;
m = strtoul (check, &check, 10);
if (*check == '-') {
check++;
d = strtoul (check, &check, 10);
}
}
if (*check != '\0')
break;
if (y == 0)
break;
date = g_date_new_dmy (d, m, y);
y = g_date_get_julian (date);
g_date_free (date);
gst_tag_list_add (list, GST_TAG_MERGE_APPEND, gst_tag, y, NULL);
break;
} else {
guint tmp;
gchar *check;
gboolean is_track_number_tag;
gboolean is_disc_number_tag;
is_track_number_tag = (strcmp (gst_tag, GST_TAG_TRACK_NUMBER) == 0);
is_disc_number_tag =
(strcmp (gst_tag, GST_TAG_ALBUM_VOLUME_NUMBER) == 0);
tmp = strtoul (value, &check, 10);
if (*check == '/' && (is_track_number_tag || is_disc_number_tag)) {
guint count;
check++;
count = strtoul (check, &check, 10);
if (*check != '\0' || count == 0)
break;
if (is_track_number_tag) {
gst_tag_list_add (list, GST_TAG_MERGE_APPEND, GST_TAG_TRACK_COUNT,
count, NULL);
} else {
gst_tag_list_add (list, GST_TAG_MERGE_APPEND,
GST_TAG_ALBUM_VOLUME_COUNT, count, NULL);
}
}
if (*check != '\0')
break;
gst_tag_list_add (list, GST_TAG_MERGE_APPEND, gst_tag, tmp, NULL);
}
break;
case G_TYPE_STRING:{
gchar *valid;
if (!g_utf8_validate (value, -1, (const gchar **) &valid)) {
valid = g_strndup (value, valid - value);
GST_DEBUG ("Invalid vorbis comment tag, truncated it to %s\n", valid);
} else {
valid = g_strdup (value);
}
gst_tag_list_add (list, GST_TAG_MERGE_APPEND, gst_tag, valid, NULL);
g_free (valid);
break;
}
case G_TYPE_DOUBLE:
gst_tag_list_add (list, GST_TAG_MERGE_APPEND, gst_tag, g_strtod (value,
NULL), NULL);
break;
default:
break;
}
}
/**
* gst_tag_list_from_vorbiscomment_buffer:
* @buffer: buffer to convert
* @id_data: identification data at start of stream
* @id_data_length: length of identification data
* @ vendor_string: pointer to a string that should take the vendor string of this
* vorbis comment or NULL if you don't need it.
*
* Creates a new tag list that contains the information parsed out of a
* vorbiscomment packet.
*
* Returns: A new #GstTagList with all tags that could be extracted from the
* given vorbiscomment buffer or NULL on error.
*/
GstTagList *
gst_tag_list_from_vorbiscomment_buffer (const GstBuffer * buffer,
const guint8 * id_data, const guint id_data_length, gchar ** vendor_string)
{
#define ADVANCE(x) G_STMT_START{ \
data += x; \
size -= x; \
if (size < 4) goto error; \
cur_size = GST_READ_UINT32_LE (data); \
data += 4; \
size -= 4; \
if (cur_size > size) goto error; \
cur = data; \
}G_STMT_END
gchar *cur, *value;
guint cur_size;
guint iterations;
guint8 *data;
guint size;
GstTagList *list;
g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
g_return_val_if_fail (id_data != NULL, NULL);
g_return_val_if_fail (id_data_length > 0, NULL);
data = GST_BUFFER_DATA (buffer);
size = GST_BUFFER_SIZE (buffer);
list = gst_tag_list_new ();
if (size < 11)
goto error;
if (memcmp (data, id_data, id_data_length) != 0)
goto error;
ADVANCE (id_data_length);
if (vendor_string)
*vendor_string = g_strndup (cur, cur_size);
ADVANCE (cur_size);
iterations = cur_size;
cur_size = 0;
while (iterations) {
ADVANCE (cur_size);
iterations--;
cur = g_strndup (cur, cur_size);
value = strchr (cur, '=');
if (value == NULL) {
g_free (cur);
continue;
}
*value = '\0';
value++;
if (!g_utf8_validate (value, -1, NULL)) {
g_free (cur);
continue;
}
gst_vorbis_tag_add (list, cur, value);
g_free (cur);
}
return list;
error:
gst_tag_list_free (list);
return NULL;
#undef ADVANCE
}
typedef struct
{
guint count;
guint data_count;
GList *entries;
}
MyForEach;
GList *
gst_tag_to_vorbis_comments (const GstTagList * list, const gchar * tag)
{
gchar *result;
GList *l = NULL;
guint i;
const gchar *vorbis_tag = gst_tag_to_vorbis_tag (tag);
if (!vorbis_tag)
return NULL;
for (i = 0; i < gst_tag_list_get_tag_size (list, tag); i++) {
switch (gst_tag_get_type (tag)) {
case G_TYPE_UINT:
if (strcmp (tag, GST_TAG_DATE) == 0) {
GDate *date;
guint u;
if (!gst_tag_list_get_uint_index (list, tag, i, &u))
g_assert_not_reached ();
date = g_date_new_julian (u);
/* vorbis suggests using ISO date formats */
result =
g_strdup_printf ("%s=%04d-%02d-%02d", vorbis_tag,
(gint) g_date_get_year (date), (gint) g_date_get_month (date),
(gint) g_date_get_day (date));
g_date_free (date);
} else {
guint u;
if (!gst_tag_list_get_uint_index (list, tag, i, &u))
g_assert_not_reached ();
result = g_strdup_printf ("%s=%u", vorbis_tag, u);
}
break;
case G_TYPE_STRING:{
gchar *str;
if (!gst_tag_list_get_string_index (list, tag, i, &str))
g_assert_not_reached ();
result = g_strdup_printf ("%s=%s", vorbis_tag, str);
g_free (str);
break;
}
case G_TYPE_DOUBLE:{
gdouble value;
if (!gst_tag_list_get_double_index (list, tag, i, &value))
g_assert_not_reached ();
result = g_strdup_printf ("%s=%f", vorbis_tag, value);
}
default:
GST_DEBUG ("Couldn't write tag %s", tag);
continue;
}
l = g_list_prepend (l, result);
}
return g_list_reverse (l);
}
static void
write_one_tag (const GstTagList * list, const gchar * tag, gpointer user_data)
{
MyForEach *data = (MyForEach *) user_data;
GList *comments;
GList *it;
comments = gst_tag_to_vorbis_comments (list, tag);
for (it = comments; it != NULL; it = it->next) {
gchar *result = it->data;
data->count++;
data->data_count += strlen (result);
data->entries = g_list_prepend (data->entries, result);
}
}
/**
* gst_tag_list_to_vorbiscomment_buffer:
* @buffer: tag list to convert
* @id_data: identification data at start of stream
* @id_data_length: length of identification data
* @ vendor_string: string that describes the vendor string or NULL
*
* Creates a new vorbiscomment buffer from a tag list.
*
* Returns: A new #GstBuffer containing a vorbiscomment buffer with all tags that
* could be converted from the given tag list.
*/
GstBuffer *
gst_tag_list_to_vorbiscomment_buffer (const GstTagList * list,
const guint8 * id_data, const guint id_data_length,
const gchar * vendor_string)
{
GstBuffer *buffer;
guint8 *data;
guint i;
GList *l;
MyForEach my_data = { 0, 0, NULL };
guint vendor_len;
int required_size;
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_foreach (my_data.entries, (GFunc) g_free, NULL);
g_list_free (my_data.entries);
*data = 1;
return buffer;
}
static GstFlowReturn
gst_vorbis_tag_chain (GstPad * pad, GstBuffer * buffer)
{
GstVorbisTag *tag;
GstBuffer *out = NULL;
tag = GST_VORBIS_TAG (gst_pad_get_parent (pad));
if (tag->output == OUTPUT_UNKNOWN) {
GstCaps *vorbis_caps = gst_caps_new_simple ("audio/x-vorbis", NULL);
GstCaps *tags_caps = gst_caps_new_simple ("application/x-gst-tags", NULL);
/* caps nego */
do {
#if 0
if (gst_pad_try_set_caps (tag->srcpad, vorbis_caps) >= 0) {
tag->output = OUTPUT_DATA;
} else if (gst_pad_try_set_caps (tag->srcpad, tags_caps) >= 0) {
tag->output = OUTPUT_TAGS;
} else {
const GstCaps *caps =
gst_static_caps_get (&gst_vorbis_tag_src_template.static_caps);
if (gst_pad_recover_caps_error (tag->srcpad, caps))
continue;
gst_caps_unref (vorbis_caps);
gst_caps_unref (tags_caps);
return GST_FLOW_ERROR;
}
#endif
} while (FALSE);
gst_caps_unref (vorbis_caps);
gst_caps_unref (tags_caps);
}
if (GST_BUFFER_SIZE (buffer) == 0)
GST_ELEMENT_ERROR (tag, CORE, TAG, (NULL),
("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);
const GstTagList *found_tags;
gst_data_unref (GST_DATA (buffer));
if (list == NULL) {
GST_ELEMENT_ERROR (tag, CORE, TAG, (NULL),
("invalid data in vorbis comments"));
return GST_FLOW_ERROR;
}
//gst_element_found_tags_for_pad (GST_ELEMENT (tag), tag->srcpad, 0,
// gst_tag_list_copy (list));
found_tags = gst_tag_setter_get_list (GST_TAG_SETTER (tag));
if (found_tags)
gst_tag_list_insert (list, found_tags,
gst_tag_setter_get_merge_mode (GST_TAG_SETTER (tag)));
out = 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, out);
} else {
gst_data_unref (GST_DATA (out));
}
return GST_FLOW_OK;
}
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);
}
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