1 files changed, 15 insertions, 1 deletions
diff --git a/libavformat/riff.h b/libavformat/riff.h
index dba3803..6f07179 100644
--- a/libavformat/riff.h
+++ b/libavformat/riff.h
@@ -46,7 +46,21 @@ void ff_end_tag(AVIOContext *pb, int64_t start);
 int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize);
 
 void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf, int ignore_extradata);
-int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc);
+
+/**
+ * Tell ff_put_wav_header() to use WAVEFORMATEX even for PCM codecs.
+ */
+#define FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX    0x00000001
+
+/**
+ * Write WAVEFORMAT header structure.
+ *
+ * @param flags a combination of FF_PUT_WAV_HEADER_* constants
+ *
+ * @return the size or -1 on error
+ */
+int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc, int flags);
+
 enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps);
 int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size);