lavf: add avformat_query_codec().

It allows to check if a given codec can be written into a container.

1 files changed, 14 insertions, 0 deletions

diff --git a/libavformat/utils.c b/libavformat/utils.c
index b848ebb827..6e3cb2fa54 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -3904,3 +3904,17 @@ int64_t ff_iso8601_to_unix_time(const char *datestr)
     return 0;
 #endif
 }
+
+int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
+{
+    if (ofmt) {
+        if (ofmt->query_codec)
+            return ofmt->query_codec(codec_id, std_compliance);
+        else if (ofmt->codec_tag)
+            return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
+        else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
+                 codec_id == ofmt->subtitle_codec)
+                return 1;
+    }
+    return AVERROR_PATCHWELCOME;
+}