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oggstream: refactor vorbis comment tag extraction

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This commit is contained in:
Mark Nauwelaerts 2010-10-27 11:58:53 +02:00
parent a4aacb9d2c
commit cc3dfd31d0
1 changed files with 50 additions and 75 deletions
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125
ext/ogg/gstoggstream.c
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@ -277,6 +277,49 @@ packet_duration_constant (GstOggStream * pad, ogg_packet * packet)
return pad->frame_size; return pad->frame_size;
} }
/* helper: extracts tags from vorbis comment ogg packet.
* Returns result in *tags after free'ing existing *tags (if any) */
static gboolean
tag_list_from_vorbiscomment_packet (ogg_packet * packet,
const guint8 * id_data, const guint id_data_length, GstTagList ** tags)
{
GstBuffer *buf = NULL;
gchar *encoder = NULL;
GstTagList *list;
gboolean ret = TRUE;
g_return_val_if_fail (tags != NULL, FALSE);
buf = gst_buffer_new ();
GST_BUFFER_DATA (buf) = (guint8 *) packet->packet;
GST_BUFFER_SIZE (buf) = packet->bytes;
list = gst_tag_list_from_vorbiscomment_buffer (buf, id_data, id_data_length,
&encoder);
if (!list) {
GST_WARNING ("failed to decode vorbis comments");
ret = FALSE;
goto exit;
}
if (encoder) {
if (encoder[0])
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_ENCODER, encoder,
NULL);
g_free (encoder);
}
exit:
if (*tags)
gst_tag_list_free (*tags);
*tags = list;
gst_buffer_unref (buf);
return ret;
}
/* theora */ /* theora */
static gboolean static gboolean
@ -597,32 +640,8 @@ static gboolean
is_header_vp8 (GstOggStream * pad, ogg_packet * packet) is_header_vp8 (GstOggStream * pad, ogg_packet * packet)
{ {
if (packet->bytes >= 7 && memcmp (packet->packet, "OVP80\2 ", 7) == 0) { if (packet->bytes >= 7 && memcmp (packet->packet, "OVP80\2 ", 7) == 0) {
GstBuffer *buf = NULL; tag_list_from_vorbiscomment_packet (packet,
gchar *encoder = NULL; (const guint8 *) "OVP80\2 ", 7, &pad->taglist);
buf = gst_buffer_new ();
GST_BUFFER_DATA (buf) = (guint8 *) packet->packet;
GST_BUFFER_SIZE (buf) = packet->bytes;
if (pad->taglist)
gst_tag_list_free (pad->taglist);
pad->taglist = gst_tag_list_from_vorbiscomment_buffer (buf,
(const guint8 *) "OVP80\2 ", 7, &encoder);
if (!pad->taglist) {
GST_ERROR_OBJECT (pad, "couldn't decode comments");
pad->taglist = gst_tag_list_new ();
}
gst_buffer_unref (buf);
buf = NULL;
if (encoder) {
if (encoder[0])
gst_tag_list_add (pad->taglist, GST_TAG_MERGE_REPLACE,
GST_TAG_ENCODER, encoder, NULL);
g_free (encoder);
}
} }
if (packet->bytes >= 5 && packet->packet[0] == 0x4F && if (packet->bytes >= 5 && packet->packet[0] == 0x4F &&
@ -690,32 +709,12 @@ is_header_vorbis (GstOggStream * pad, ogg_packet * packet)
return FALSE; return FALSE;
if (((guint8 *) (packet->packet))[0] == 0x03) { if (((guint8 *) (packet->packet))[0] == 0x03) {
GstBuffer *buf = NULL; tag_list_from_vorbiscomment_packet (packet,
gchar *encoder = NULL; (const guint8 *) "\003vorbis", 7, &pad->taglist);
buf = gst_buffer_new (); if (!pad->taglist)
GST_BUFFER_DATA (buf) = (guint8 *) packet->packet;
GST_BUFFER_SIZE (buf) = packet->bytes;
if (pad->taglist)
gst_tag_list_free (pad->taglist);
pad->taglist = gst_tag_list_from_vorbiscomment_buffer (buf,
(const guint8 *) "\003vorbis", 7, &encoder);
if (!pad->taglist) {
GST_ERROR_OBJECT (pad, "couldn't decode comments");
pad->taglist = gst_tag_list_new (); pad->taglist = gst_tag_list_new ();
}
gst_buffer_unref (buf);
buf = NULL;
if (encoder) {
if (encoder[0])
gst_tag_list_add (pad->taglist, GST_TAG_MERGE_REPLACE,
GST_TAG_ENCODER, encoder, NULL);
g_free (encoder);
}
gst_tag_list_add (pad->taglist, GST_TAG_MERGE_REPLACE, gst_tag_list_add (pad->taglist, GST_TAG_MERGE_REPLACE,
GST_TAG_ENCODER_VERSION, pad->version, NULL); GST_TAG_ENCODER_VERSION, pad->version, NULL);
@ -1297,32 +1296,8 @@ static gboolean
is_header_ogm (GstOggStream * pad, ogg_packet * packet) is_header_ogm (GstOggStream * pad, ogg_packet * packet)
{ {
if (!(packet->packet[0] & 1) && (packet->packet[0] & 3 && pad->is_ogm_text)) { if (!(packet->packet[0] & 1) && (packet->packet[0] & 3 && pad->is_ogm_text)) {
GstBuffer *buf = NULL; tag_list_from_vorbiscomment_packet (packet,
gchar *encoder = NULL; (const guint8 *) "\003vorbis", 7, &pad->taglist);
buf = gst_buffer_new ();
GST_BUFFER_DATA (buf) = (guint8 *) packet->packet;
GST_BUFFER_SIZE (buf) = packet->bytes;;
if (pad->taglist)
gst_tag_list_free (pad->taglist);
pad->taglist = gst_tag_list_from_vorbiscomment_buffer (buf,
(const guint8 *) "\003vorbis", 7, &encoder);
if (!pad->taglist) {
GST_ERROR ("couldn't decode comments");
pad->taglist = gst_tag_list_new ();
}
gst_buffer_unref (buf);
buf = NULL;
if (encoder) {
if (encoder[0])
gst_tag_list_add (pad->taglist, GST_TAG_MERGE_REPLACE,
GST_TAG_ENCODER, encoder, NULL);
g_free (encoder);
}
} }
if (packet->bytes >= 1 && (packet->packet[0] & 0x01)) if (packet->bytes >= 1 && (packet->packet[0] & 0x01))