From: Gilbok Lee <gilbok.lee@samsung.com>
Date: Sat, 20 Nov 2021 06:39:08 +0000 (+0900)
Subject: subparse: Add reference timestamp meta in GstBuffer for HLS webvtt
X-Git-Tag: accepted/tizen/unified/20211202.120742~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d4e6aa89f86efbc9cc665f2ee123a33015f1449a;p=platform%2Fupstream%2Fgst-plugins-base.git

subparse: Add reference timestamp meta in GstBuffer for HLS webvtt

- When discontinuous buffer come in during HLS,
  send the input buffer pts to the reference timestamp meta data
- The reference timetamp meta data is added with the input buffer pts
  to synchronize with the mpeg ts stream

Change-Id: I5ff5b9523b44323f1d6aa37133e5341505d4ce55
---

diff --git a/gst/subparse/gstsubparse.c b/gst/subparse/gstsubparse.c
index 0b698f5..c807814 100644
--- a/gst/subparse/gstsubparse.c
+++ b/gst/subparse/gstsubparse.c
@@ -1982,6 +1982,9 @@ handle_buffer (GstSubParse * self, GstBuffer * buf)
 #ifdef TIZEN_FEATURE_SUBPARSE_MODIFICATION
   GstMessage *m = NULL;
 #endif
+#ifdef TIZEN_FEATURE_HLS_WEBVTT
+  GstClockTime reference_time = GST_CLOCK_TIME_NONE;
+#endif
 
   if (self->first_buffer) {
     GstMapInfo map;
@@ -1994,6 +1997,11 @@ handle_buffer (GstSubParse * self, GstBuffer * buf)
     self->state.fps_d = self->fps_d;
   }
 
+#ifdef TIZEN_FEATURE_HLS_WEBVTT
+  if (GST_BUFFER_IS_DISCONT (buf) && GST_BUFFER_PTS_IS_VALID (buf))
+    reference_time = GST_BUFFER_PTS (buf);
+#endif
+
   feed_textbuf (self, buf);
 
   /* make sure we know the format */
@@ -2101,6 +2109,17 @@ handle_buffer (GstSubParse * self, GstBuffer * buf)
       GST_BUFFER_TIMESTAMP (buf) = self->state.start_time;
       GST_BUFFER_DURATION (buf) = self->state.duration;
 
+#ifdef TIZEN_FEATURE_HLS_WEBVTT
+      if ((self->parser_type == GST_SUB_PARSE_FORMAT_VTT)
+          && GST_CLOCK_TIME_IS_VALID (reference_time)) {
+        GstCaps *sink_caps = gst_pad_get_current_caps (self->sinkpad);
+        if (sink_caps) {
+          gst_buffer_add_reference_timestamp_meta (buf, sink_caps,
+              reference_time, GST_CLOCK_TIME_NONE);
+          gst_caps_unref (sink_caps);
+        }
+      }
+#endif
       /* in some cases (e.g. tmplayer) we can only determine the duration
        * of a text chunk from the timestamp of the next text chunk; in those
        * cases, we probably want to limit the duration to something
diff --git a/packaging/gst-plugins-base.spec b/packaging/gst-plugins-base.spec
index 71b292f..0e816d1 100644
--- a/packaging/gst-plugins-base.spec
+++ b/packaging/gst-plugins-base.spec
@@ -5,7 +5,7 @@
 
 Name:           gst-plugins-base
 Version:        1.16.2
-Release:        19
+Release:        20
 License:        LGPL-2.0+
 Summary:        GStreamer Streaming-Media Framework Plug-Ins
 Url:            http://gstreamer.freedesktop.org/