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gst/matroska/: Basic tag reading support.

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Original commit message from CVS:
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_parse_metadata):
* gst/matroska/matroska-ids.h:
Basic tag reading support.
This commit is contained in:
Ronald S. Bultje 2004-05-01 17:27:23 +00:00
parent 26a94c4bb2
commit 129c79c841
3 changed files with 191 additions and 2 deletions
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7
ChangeLog
View file

@ -1,3 +1,10 @@
2004-05-01 Ronald Bultje <rbultje@ronald.bitfreak.net>
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_parse_metadata):
* gst/matroska/matroska-ids.h:
Basic tag reading support.
2004-04-30 Ronald Bultje <rbultje@ronald.bitfreak.net>
* gst/matroska/matroska-demux.c: (gst_matroska_demux_audio_caps):

163
gst/matroska/matroska-demux.c
View file

@ -1471,6 +1471,37 @@ gst_matroska_demux_parse_metadata (GstMatroskaDemux * demux,
gboolean res = TRUE;
guint32 id;
guint64 length = 0;
struct
{
gchar *matroska_tagname;
gchar *gstreamer_tagname;
}
tag_conv[] =
{
{
GST_MATROSKA_TAG_ID_TITLE, GST_TAG_TITLE}
, {
GST_MATROSKA_TAG_ID_AUTHOR, GST_TAG_ARTIST}
, {
GST_MATROSKA_TAG_ID_ALBUM, GST_TAG_ALBUM}
, {
GST_MATROSKA_TAG_ID_COMMENTS, GST_TAG_COMMENT}
, {
GST_MATROSKA_TAG_ID_BITSPS, GST_TAG_BITRATE}
, {
GST_MATROSKA_TAG_ID_ENCODER, GST_TAG_ENCODER}
, {
GST_MATROSKA_TAG_ID_DATE, GST_TAG_DATE}
, {
GST_MATROSKA_TAG_ID_ISRC, GST_TAG_ISRC}
, {
GST_MATROSKA_TAG_ID_COPYRIGHT, GST_TAG_COPYRIGHT}
, {
NULL, NULL}
};
gint i;
gboolean have_tags = FALSE;
GstTagList *taglist = gst_tag_list_new ();
if (prevent_eos) {
length = gst_bytestream_length (ebml->bs);
@ -1492,8 +1523,122 @@ gst_matroska_demux_parse_metadata (GstMatroskaDemux * demux,
}
switch (id) {
case GST_MATROSKA_ID_TAG:
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
while (res) {
/* read all sub-entries */
if (prevent_eos && length == gst_bytestream_tell (ebml->bs)) {
res = FALSE;
break;
} else if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
case GST_MATROSKA_ID_SIMPLETAG:{
gchar *tag = NULL, *value = NULL;
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
while (res) {
/* read all sub-entries */
if (prevent_eos && length == gst_bytestream_tell (ebml->bs)) {
res = FALSE;
break;
} else if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
case GST_MATROSKA_ID_TAGNAME:
g_free (tag);
res = gst_ebml_read_ascii (ebml, &id, &tag);
break;
case GST_MATROSKA_ID_TAGSTRING:
g_free (value);
res = gst_ebml_read_utf8 (ebml, &id, &value);
break;
default:
GST_WARNING ("Unknown entry 0x%x in metadata collection",
id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
if (tag && value) {
for (i = 0; tag_conv[i].matroska_tagname != NULL; i++) {
if (!strcmp (tag_conv[i].matroska_tagname, tag)) {
GValue src = { 0 }
, dest =
{
0};
const gchar *type = tag_conv[i].gstreamer_tagname;
GType dest_type = gst_tag_get_type (type);
g_value_init (&src, G_TYPE_STRING);
g_value_set_string (&src, value);
g_value_init (&dest, dest_type);
g_value_transform (&src, &dest);
g_value_unset (&src);
gst_tag_list_add_values (taglist, GST_TAG_MERGE_APPEND,
type, &dest, NULL);
g_value_unset (&dest);
have_tags = TRUE;
break;
}
}
}
g_free (tag);
g_free (value);
break;
}
default:
GST_WARNING ("Unknown entry 0x%x in metadata collection", id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
break;
default:
GST_WARNING ("metadata unimplemented");
GST_WARNING ("Unknown entry 0x%x in metadata header", id);
/* fall-through */
case GST_EBML_ID_VOID:
@ -1508,6 +1653,22 @@ gst_matroska_demux_parse_metadata (GstMatroskaDemux * demux,
}
}
if (have_tags) {
const GList *padlist;
/* let the world know about this wonderful thing */
for (padlist = gst_element_get_pad_list (GST_ELEMENT (ebml));
padlist != NULL; padlist = padlist->next) {
if (GST_PAD_IS_SRC (padlist->data) && GST_PAD_IS_USABLE (padlist->data)) {
gst_pad_push (GST_PAD (padlist->data),
GST_DATA (gst_event_new_tag (taglist)));
}
}
gst_element_found_tags (GST_ELEMENT (ebml), taglist);
} else {
gst_tag_list_free (taglist);
}
return res;
}

23
gst/matroska/matroska-ids.h
View file

@ -97,7 +97,14 @@
#define GST_MATROSKA_ID_CUECLUSTERPOSITION 0xF1
/* IDs in the tags master */
/* TODO */
#define GST_MATROSKA_ID_TAG 0x7373
/* in the tag master */
#define GST_MATROSKA_ID_SIMPLETAG 0x67C8
/* in the simpletag master */
#define GST_MATROSKA_ID_TAGNAME 0x45A3
#define GST_MATROSKA_ID_TAGSTRING 0x4487
/* IDs in the seekhead master */
#define GST_MATROSKA_ID_SEEKENTRY 0x4DBB
@ -143,6 +150,20 @@
#define GST_MATROSKA_CODEC_ID_AUDIO_MPEG4 "A_AAC/MPEG4/"
/* TODO: AC3-9/10 (?), Real, Musepack, Quicktime */
/*
* Matrodka tags. Strings.
*/
#define GST_MATROSKA_TAG_ID_TITLE "TITLE"
#define GST_MATROSKA_TAG_ID_AUTHOR "AUTHOR"
#define GST_MATROSKA_TAG_ID_ALBUM "ALBUM"
#define GST_MATROSKA_TAG_ID_COMMENTS "COMMENTS"
#define GST_MATROSKA_TAG_ID_BITSPS "BITSPS"
#define GST_MATROSKA_TAG_ID_ENCODER "ENCODER"
#define GST_MATROSKA_TAG_ID_DATE "DATE"
#define GST_MATROSKA_TAG_ID_ISRC "ISRC"
#define GST_MATROSKA_TAG_ID_COPYRIGHT "COPYRIGHT"
/*
* Enumerations for various types (mapping from binary
* value to what it actually means).