From d005a7cdfd8762d436dc5d3ec12bab4f96781c4f Mon Sep 17 00:00:00 2001
From: James Almer <jamrial@gmail.com>
Date: Sun, 2 Feb 2020 19:12:08 -0300
Subject: [PATCH] avcodec: add an AVCodecContext flag to export PRFT side data
 on demand

Signed-off-by: James Almer <jamrial@gmail.com>
---
 doc/APIchanges             | 3 +++
 doc/codecs.texi            | 3 +++
 libavcodec/avcodec.h       | 8 +++++++-
 libavcodec/options_table.h | 1 +
 libavcodec/version.h       | 2 +-
 5 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/doc/APIchanges b/doc/APIchanges
index aba4f5fd7a..5bfb0a654e 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,9 @@ libavutil:     2017-10-21
 
 API changes, most recent first:
 
+2020-02-21 - xxxxxxxxxx - lavc 58.73.101 - avcodec.h
+  Add AV_CODEC_EXPORT_DATA_PRFT.
+
 2020-02-21 - xxxxxxxxxx - lavc 58.73.100 - avcodec.h
   Add AVCodecContext.export_side_data and AV_CODEC_EXPORT_DATA_MVS.
 
diff --git a/doc/codecs.texi b/doc/codecs.texi
index 62090b3d51..2112ce5f46 100644
--- a/doc/codecs.texi
+++ b/doc/codecs.texi
@@ -795,6 +795,9 @@ Possible values:
 @item mvs
 Export motion vectors into frame side-data (see @code{AV_FRAME_DATA_MOTION_VECTORS})
 for codecs that support it. See also @file{doc/examples/export_mvs.c}.
+@item prft
+Export encoder Producer Reference Time into packet side-data (see @code{AV_PKT_DATA_PRFT})
+for codecs that support it.
 @end table
 
 @item error @var{integer} (@emph{encoding,video})
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index ba0fdd3493..82dce38bb8 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -1110,6 +1110,10 @@ typedef struct RcOverride{
  * Export motion vectors through frame side data
  */
 #define AV_CODEC_EXPORT_DATA_MVS         (1 << 0)
+/**
+ * Export encoder Producer Reference Time through packet side data
+ */
+#define AV_CODEC_EXPORT_DATA_PRFT        (1 << 1)
 
 /**
  * Pan Scan area.
@@ -1430,7 +1434,9 @@ enum AVPacketSideDataType {
     AV_PKT_DATA_AFD,
 
     /**
-     * Producer Reference Time data corresponding to the AVProducerReferenceTime struct.
+     * Producer Reference Time data corresponding to the AVProducerReferenceTime struct,
+     * usually exported by some encoders (on demand through the prft flag set in the
+     * AVCodecContext export_side_data field).
      */
     AV_PKT_DATA_PRFT,
 
diff --git a/libavcodec/options_table.h b/libavcodec/options_table.h
index 3f278d5c68..3265889b8e 100644
--- a/libavcodec/options_table.h
+++ b/libavcodec/options_table.h
@@ -80,6 +80,7 @@ static const AVOption avcodec_options[] = {
 {"ass_ro_flush_noop", "do not reset ASS ReadOrder field on flush", 0, AV_OPT_TYPE_CONST, {.i64 = AV_CODEC_FLAG2_RO_FLUSH_NOOP}, INT_MIN, INT_MAX, S|D, "flags2"},
 {"export_side_data", "Export metadata as side data", OFFSET(export_side_data), AV_OPT_TYPE_FLAGS, {.i64 = DEFAULT}, 0, UINT_MAX, A|V|S|D|E, "export_side_data"},
 {"mvs", "export motion vectors through frame side data", 0, AV_OPT_TYPE_CONST, {.i64 = AV_CODEC_EXPORT_DATA_MVS}, INT_MIN, INT_MAX, V|D, "export_side_data"},
+{"prft", "export Producer Reference Time through packet side data", 0, AV_OPT_TYPE_CONST, {.i64 = AV_CODEC_EXPORT_DATA_PRFT}, INT_MIN, INT_MAX, A|V|S|E, "export_side_data"},
 {"time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, {.dbl = 0}, 0, INT_MAX},
 {"g", "set the group of picture (GOP) size", OFFSET(gop_size), AV_OPT_TYPE_INT, {.i64 = 12 }, INT_MIN, INT_MAX, V|E},
 {"ar", "set audio sampling rate (in Hz)", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, 0, INT_MAX, A|D|E},
diff --git a/libavcodec/version.h b/libavcodec/version.h
index c2b5864e5f..a356445596 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR  58
 #define LIBAVCODEC_VERSION_MINOR  73
-#define LIBAVCODEC_VERSION_MICRO 100
+#define LIBAVCODEC_VERSION_MICRO 101
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \