From: Michael Kuron <1748330+mkuron@users.noreply.github.com>
Date: Sat, 16 Aug 2025 10:45:51 +0000 (+0200)
Subject: dvb_psi_pmt: Don't recognize extension descriptor as AC-4 audio
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ec0469c199783f261e852a66d289906ea5097d86;p=thirdparty%2Ftvheadend.git

dvb_psi_pmt: Don't recognize extension descriptor as AC-4 audio
---

diff --git a/src/input/mpegts/dvb.h b/src/input/mpegts/dvb.h
index 311e27cd5..4749f790e 100644
--- a/src/input/mpegts/dvb.h
+++ b/src/input/mpegts/dvb.h
@@ -167,7 +167,7 @@ struct lang_str;
 #define DVB_DESC_CRID                 0x76
 #define DVB_DESC_EAC3                 0x7A
 #define DVB_DESC_AAC                  0x7C
-#define DVB_DESC_AC4                  0x7F
+#define DVB_DESC_EXTENSION            0x7F
 
 #define DVB_DESC_BSKYB_LCN            0xB1
 
diff --git a/src/input/mpegts/dvb_psi_pmt.c b/src/input/mpegts/dvb_psi_pmt.c
index df14f47ec..fff6919e5 100644
--- a/src/input/mpegts/dvb_psi_pmt.c
+++ b/src/input/mpegts/dvb_psi_pmt.c
@@ -249,6 +249,7 @@ dvb_psi_parse_pmt
   int tt_position;
   int video_stream;
   int rds_uecp;
+  int ac4;
   int pcr_shared = 0;
   const char *lang;
   uint8_t audio_type, audio_version;
@@ -311,6 +312,7 @@ dvb_psi_parse_pmt
     composition_id = -1;
     ancillary_id = -1;
     rds_uecp = 0;
+    ac4 = 0;
     position = 0;
     tt_position = 1000;
     lang = NULL;
@@ -439,8 +441,14 @@ dvb_psi_parse_pmt
           hts_stream_type = SCT_EAC3;
         break;
 
-      case DVB_DESC_AC4:
-        if(estype == 0x06 || estype == 0x81)
+      case DVB_DESC_EXTENSION:
+        if(dlen < 1)
+          break;
+
+        if(ptr[0] == 0x15) /* descriptor_tag_extension : AC-4 */
+          ac4 = 1;
+
+        if((estype == 0x06 || estype == 0x81) && ac4)
           hts_stream_type = SCT_AC4;
         break;