lavf: add avformat_query_codec().

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

1 files changed, 18 insertions, 0 deletions

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 957039f64e..2a00a9fea4 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -322,6 +322,14 @@ typedef struct AVOutputFormat {
 
     const AVClass *priv_class; ///< AVClass for the private context
 
+    /**
+     * Test if the given codec can be stored in this container.
+     *
+     * @return 1 if the codec is supported, 0 if it is not.
+     *         A negative number if unknown.
+     */
+    int (*query_codec)(enum CodecID id, int std_compliance);
+
     /* private fields */
     struct AVOutputFormat *next;
 } AVOutputFormat;
@@ -1595,4 +1603,14 @@ attribute_deprecated int avf_sdp_create(AVFormatContext *ac[], int n_files, char
  */
 int av_match_ext(const char *filename, const char *extensions);
 
+/**
+ * Test if the given container can store a codec.
+ *
+ * @param std_compliance standards compliance level, one of FF_COMPLIANCE_*
+ *
+ * @return 1 if codec with ID codec_id can be stored in ofmt, 0 if it cannot.
+ *         A negative number if this information is not available.
+ */
+int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance);
+
 #endif /* AVFORMAT_AVFORMAT_H */