upipe-ts: add SCTE-35 avail splice descriptor

Author: quarium

include/upipe-ts/uref_ts_scte35_desc.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020 EasyTools
+ * Copyright (C) 2020-2025 EasyTools
  *
  * Authors: Arnaud de Turckheim
  *
@@ -40,8 +40,15 @@ extern "C" {
 #include <string.h>
 #include <stdint.h>
 
+/* splice descriptor */
 UREF_ATTR_SMALL_UNSIGNED(ts_scte35_desc, tag, "scte35.desc.tag", tag)
 UREF_ATTR_UNSIGNED(ts_scte35_desc, identifier, "scte35.desc.id", identifier)
+
+/* avail splice descriptor */
+UREF_ATTR_UNSIGNED(ts_scte35_desc_avail, provider_avail_id,
+                   "scte35.desc.avail.provider_avail_id", provider avail id)
+
+/* segmentation splice descriptor*/
 UREF_ATTR_UNSIGNED(ts_scte35_desc_seg, event_id, "scte35.desc.seg.event_id",
                    segmentation event id);
 UREF_ATTR_VOID(ts_scte35_desc_seg, cancel, "scte35.desc.seg.cancel",

lib/upipe-ts/uref_ts_scte35.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2022 EasyTools
+ * Copyright (C) 2022-2025 EasyTools
  *
  * Authors: Arnaud de Turckheim
  *
@@ -135,6 +135,20 @@ struct uref *uref_ts_scte35_extract_desc(struct uref *uref, uint64_t at)
     length -= SCTE35_SPLICE_DESC_HEADER_SIZE;
 
     switch (tag) {
+        case SCTE35_SPLICE_DESC_TAG_AVAIL: {
+            if (length < SCTE35_AVAIL_DESC_HEADER_SIZE) {
+                uref_free(out);
+                return NULL;
+            }
+            length -= SCTE35_AVAIL_DESC_HEADER_SIZE;
+
+            uint32_t provider_avail_id =
+                scte35_avail_desc_get_provider_avail_id(desc);
+            uref_ts_scte35_desc_avail_set_provider_avail_id(out,
+                                                            provider_avail_id);
+            break;
+        }
+
         case SCTE35_SPLICE_DESC_TAG_SEG: {
             if (length < SCTE35_SEG_DESC_HEADER_SIZE) {
                 uref_free(out);