From fa12fb3b00cb4e08a38a4fb192293347c218b3d3 Mon Sep 17 00:00:00 2001
From: Kieran Kunhya <kieran@kunhya.com>
Date: Fri, 4 Mar 2011 15:09:32 +0000
Subject: [PATCH] Output MPEG-TS stream identifiers.

with changes by michael to simplify API
---
 libavformat/avformat.h | 7 +++++++
 libavformat/mpegts.c   | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 59123ca101..6381526a20 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -606,6 +606,13 @@ typedef struct AVStream {
      */
     int codec_info_nb_frames;
 
+    /**
+     * Stream Identifier
+     * This is the MPEG-TS stream identifier +1
+     * 0 means unknown
+     */
+    int stream_identifier;
+
     /**
      * Stream informations used internally by av_find_stream_info()
      */
diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index ea11a3eaf8..9511ede08d 100644
--- a/libavformat/mpegts.c
+++ b/libavformat/mpegts.c
@@ -994,6 +994,9 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
             stream_type == STREAM_TYPE_PRIVATE_DATA)
             mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
         break;
+    case 0x52: /* stream identifier descriptor */
+        st->stream_identifier = 1 + get8(pp, desc_end);
+        break;
     default:
         break;
     }