avformat: move AVStream.stream_identifier to AVStreamInternal

It's a private field, no reason to have it exposed in a public header.

Signed-off-by: James Almer <jamrial@gmail.com>

libavformat/avformat.h

@@ -1003,13 +1003,6 @@ typedef struct AVStream {
     int64_t first_dts;
     int64_t cur_dts;
 
-    /**
-     * Stream Identifier
-     * This is the MPEG-TS stream identifier +1
-     * 0 means unknown
-     */
-    int stream_identifier;
-
     /**
      * An opaque field for libavformat internal usage.
      * Must not be accessed in any way by callers.

libavformat/internal.h

@@ -382,6 +382,13 @@ struct AVStreamInternal {
      * Number of frames that have been demuxed during avformat_find_stream_info()
      */
     int codec_info_nb_frames;
+
+    /**
+     * Stream Identifier
+     * This is the MPEG-TS stream identifier +1
+     * 0 means unknown
+     */
+    int stream_identifier;
 };
 
 void avpriv_stream_set_need_parsing(AVStream *st, enum AVStreamParseType type);

libavformat/mpegts.c

@@ -1995,7 +1995,7 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
         }
         break;
     case 0x52: /* stream identifier descriptor */
-        st->stream_identifier = 1 + get8(pp, desc_end);
+        st->internal->stream_identifier = 1 + get8(pp, desc_end);
         break;
     case METADATA_DESCRIPTOR:
         if (get16(pp, desc_end) == 0xFFFF)
@@ -2114,7 +2114,7 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
             // Listing of data_component_ids is in STD-B10, part 2, Annex J.
             // Component tag limits are documented in TR-B14, fascicle 2,
             // Vol. 3, Section 2, 4.2.8.1
-            int actual_component_tag = st->stream_identifier - 1;
+            int actual_component_tag = st->internal->stream_identifier - 1;
             int picked_profile = FF_PROFILE_UNKNOWN;
             int data_component_id = get16(pp, desc_end);
             if (data_component_id < 0)