wav muxer: write metadata

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Changelog

@@ -2,6 +2,7 @@ Entries are sorted chronologically from oldest to youngest within each release,
 releases are sorted from youngest to oldest.
 
 version <next>:
+- metadata (INFO tag) support in WAV muxer
 
 
 version 9_beta1:

libavformat/version.h

@@ -30,7 +30,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 54
-#define LIBAVFORMAT_VERSION_MINOR 18
+#define LIBAVFORMAT_VERSION_MINOR 19
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \

libavformat/wav.c

@@ -135,6 +135,9 @@ static int wav_write_header(AVFormatContext *s)
     wav->maxpts = wav->last_duration = 0;
     wav->minpts = INT64_MAX;
 
+    /* info header */
+    ff_riff_write_info(s);
+
     /* data header */
     wav->data = ff_start_tag(pb, "data");