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dashdemux2: Basic support for container-specific-track-id tag

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6041>
This commit is contained in:
Philippe Normand 2024-02-03 11:54:41 +00:00
parent 080320609c
commit 6f778eebf9
1 changed files with 48 additions and 2 deletions
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50
subprojects/gst-plugins-good/ext/adaptivedemux2/dash/gstdashdemux.c
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@ -846,6 +846,7 @@ gst_dash_demux_setup_all_streams (GstDashDemux2 * demux)
GstStructure *s;
gchar *lang = NULL;
GstTagList *tags = NULL;
gchar *track_id = NULL;
active_stream =
gst_mpd_client2_get_active_stream_by_index (demux->client, i);
@ -866,6 +867,46 @@ gst_dash_demux_setup_all_streams (GstDashDemux2 * demux)
if (streamtype == GST_STREAM_TYPE_UNKNOWN)
continue;
/* Fill container-specific track-id string */
if (active_stream->cur_adapt_set) {
/* FIXME: For CEA 608 and CEA 708 tracks we should check the Accessibility descriptor:
* https://dev.w3.org/html5/html-sourcing-inband-tracks/#mpegdash
* * An ISOBMFF CEA 608 caption service: the string "cc" concatenated with
* the value of the 'channel-number' field in the Accessibility descriptor
* in the ContentComponent or AdaptationSet.
* * An ISOBMFF CEA 708 caption service: the string "sn" concatenated with
* the value of the 'service-number' field in the Accessibility descriptor
* in the ContentComponent or AdaptationSet.
* * Otherwise:
*/
/* Content of the id attribute in the ContentComponent or AdaptationSet
* element. */
if (active_stream->cur_adapt_set->id) {
track_id = g_strdup_printf ("%d", active_stream->cur_adapt_set->id);
} else {
GList *it;
for (it = active_stream->cur_adapt_set->ContentComponents; it;
it = it->next) {
GstMPDContentComponentNode *cc_node = it->data;
if (cc_node->id) {
track_id = g_strdup_printf ("%u", cc_node->id);
break;
}
}
/* Empty string if the id attribute is not present on either
* element. */
if (!track_id)
track_id = g_strdup ("");
}
}
if (track_id) {
tags = gst_tag_list_new (GST_TAG_CONTAINER_SPECIFIC_TRACK_ID, track_id,
NULL);
g_free (track_id);
}
stream_id =
g_strdup_printf ("%s-%d", gst_stream_type_get_name (streamtype), i);
@ -894,10 +935,15 @@ gst_dash_demux_setup_all_streams (GstDashDemux2 * demux)
}
if (lang) {
if (!tags)
tags = gst_tag_list_new_empty ();
if (gst_tag_check_language_code (lang))
tags = gst_tag_list_new (GST_TAG_LANGUAGE_CODE, lang, NULL);
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE, GST_TAG_LANGUAGE_CODE,
lang, NULL);
else
tags = gst_tag_list_new (GST_TAG_LANGUAGE_NAME, lang, NULL);
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE, GST_TAG_LANGUAGE_NAME,
lang, NULL);
}
stream = gst_dash_demux_stream_new (demux->client->period_idx, stream_id);