From af21356dc9a9979c68e51970414ab95b9f9f2b76 Mon Sep 17 00:00:00 2001
From: Klaas de Waal <kdewaal@mythtv.org>
Date: Sun, 3 May 2020 17:46:07 +0200
Subject: [PATCH] Add search function for DVB extension descriptor

---
 mythtv/libs/libmythtv/mpeg/mpegdescriptors.cpp | 13 +++++++++++++
 mythtv/libs/libmythtv/mpeg/mpegdescriptors.h   |  1 +
 2 files changed, 14 insertions(+)

diff --git a/mythtv/libs/libmythtv/mpeg/mpegdescriptors.cpp b/mythtv/libs/libmythtv/mpeg/mpegdescriptors.cpp
index c57298ac433..708fe0398f5 100644
--- a/mythtv/libs/libmythtv/mpeg/mpegdescriptors.cpp
+++ b/mythtv/libs/libmythtv/mpeg/mpegdescriptors.cpp
@@ -86,6 +86,19 @@ const unsigned char *MPEGDescriptor::Find(const desc_list_t &parsed,
     return nullptr;
 }
 
+const unsigned char *MPEGDescriptor::FindExtension(const desc_list_t &parsed,
+                                                    uint desc_tag)
+{
+    for (const auto *item : parsed)
+    {
+        if (item[0] == DescriptorID::extension &&
+            item[1] > 1 &&
+            item[2] == desc_tag)
+            return item;
+    }
+    return nullptr;
+}
+
 desc_list_t MPEGDescriptor::FindAll(const desc_list_t &parsed, uint desc_tag)
 {
     desc_list_t tmp;
diff --git a/mythtv/libs/libmythtv/mpeg/mpegdescriptors.h b/mythtv/libs/libmythtv/mpeg/mpegdescriptors.h
index 98628e83b75..1b4b6569b3b 100644
--- a/mythtv/libs/libmythtv/mpeg/mpegdescriptors.h
+++ b/mythtv/libs/libmythtv/mpeg/mpegdescriptors.h
@@ -329,6 +329,7 @@ class MTV_PUBLIC MPEGDescriptor
                                         int excluded_descid);
 
     static const unsigned char *Find(const desc_list_t &parsed, uint desc_tag);
+    static const unsigned char *FindExtension(const desc_list_t &parsed, uint desc_tag);
     static desc_list_t FindAll(const desc_list_t &parsed, uint desc_tag);
 
     static const unsigned char *FindBestMatch(