From 8f9a53fa859ae48cadbe88fe9ae1f53432fb91f6 Mon Sep 17 00:00:00 2001
From: Seungha Yang <seungha@centricular.com>
Date: Thu, 8 Aug 2024 06:23:47 +0900
Subject: [PATCH] timecodestamper: Add running-time source mode

Add a new source mode "running-time". This mode will convert buffer
running time into timecode

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7322>
---
 .../docs/plugins/gst_plugins_cache.json       |  5 ++++
 .../gst/timecode/gsttimecodestamper.c         | 26 +++++++++++++++++++
 .../gst/timecode/gsttimecodestamper.h         |  1 +
 3 files changed, 32 insertions(+)

diff --git a/subprojects/gst-plugins-bad/docs/plugins/gst_plugins_cache.json b/subprojects/gst-plugins-bad/docs/plugins/gst_plugins_cache.json
index 1235eb86e4..2c503a6fe2 100644
--- a/subprojects/gst-plugins-bad/docs/plugins/gst_plugins_cache.json
+++ b/subprojects/gst-plugins-bad/docs/plugins/gst_plugins_cache.json
@@ -240879,6 +240879,11 @@
                         "desc": "Timecode from real time clock",
                         "name": "rtc",
                         "value": "5"
+                    },
+                    {
+                        "desc": "Buffer running time as timecode",
+                        "name": "running-time",
+                        "value": "6"
                     }
                 ]
             }
diff --git a/subprojects/gst-plugins-bad/gst/timecode/gsttimecodestamper.c b/subprojects/gst-plugins-bad/gst/timecode/gsttimecodestamper.c
index c1440b83df..6de15b3ccc 100644
--- a/subprojects/gst-plugins-bad/gst/timecode/gsttimecodestamper.c
+++ b/subprojects/gst-plugins-bad/gst/timecode/gsttimecodestamper.c
@@ -189,6 +189,15 @@ gst_timecodestamper_source_get_type (void)
         "Linear timecode from an audio device", "ltc"},
     {GST_TIME_CODE_STAMPER_SOURCE_RTC,
         "Timecode from real time clock", "rtc"},
+    /**
+     * GstTimeCodeStamperSource::running-time:
+     *
+     * Buffer running time as timecode
+     *
+     * Since: 1.26
+     */
+    {GST_TIME_CODE_STAMPER_SOURCE_RUNNING_TIME,
+        "Buffer running time as timecode", "running-time"},
     {0, NULL, NULL},
   };
 
@@ -1581,6 +1590,23 @@ gst_timecodestamper_transform_ip (GstBaseTransform * vfilter,
     case GST_TIME_CODE_STAMPER_SOURCE_RTC:
       tc = timecodestamper->rtc_tc;
       break;
+    case GST_TIME_CODE_STAMPER_SOURCE_RUNNING_TIME:
+      if (GST_CLOCK_TIME_IS_VALID (running_time)) {
+        guint64 num_frames = gst_util_uint64_scale (running_time,
+            timecodestamper->fps_n, timecodestamper->fps_d * GST_SECOND);
+        guint field_count = 0;
+
+        if (timecodestamper->interlace_mode !=
+            GST_VIDEO_INTERLACE_MODE_PROGRESSIVE) {
+          field_count = 1;
+        }
+
+        tc = gst_video_time_code_new (timecodestamper->fps_n,
+            timecodestamper->fps_d, NULL, tc_flags, 0, 0, 0, 0, field_count);
+        gst_video_time_code_add_frames (tc, num_frames);
+        free_tc = TRUE;
+      }
+      break;
   }
 
   switch (timecodestamper->tc_set) {
diff --git a/subprojects/gst-plugins-bad/gst/timecode/gsttimecodestamper.h b/subprojects/gst-plugins-bad/gst/timecode/gsttimecodestamper.h
index 47232565cc..1779f670d1 100644
--- a/subprojects/gst-plugins-bad/gst/timecode/gsttimecodestamper.h
+++ b/subprojects/gst-plugins-bad/gst/timecode/gsttimecodestamper.h
@@ -52,6 +52,7 @@ typedef enum GstTimeCodeStamperSource
   GST_TIME_CODE_STAMPER_SOURCE_LAST_KNOWN_OR_ZERO,
   GST_TIME_CODE_STAMPER_SOURCE_LTC,
   GST_TIME_CODE_STAMPER_SOURCE_RTC,
+  GST_TIME_CODE_STAMPER_SOURCE_RUNNING_TIME,
 } GstTimeCodeStamperSource;
 
 typedef enum GstTimeCodeStamperSet {