avcodec: add av_get_audio_frame_duration() function.

This is a utility function for the user to get the frame duration based on
the codec id, frame size in bytes, and various AVCodecContext parameters.

1 files changed, 10 insertions, 0 deletions

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index bdd72f7d5c..7074b582ec 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -3942,6 +3942,16 @@ int av_get_bits_per_sample(enum CodecID codec_id);
  */
 int av_get_exact_bits_per_sample(enum CodecID codec_id);
 
+/**
+ * Return audio frame duration.
+ *
+ * @param avctx        codec context
+ * @param frame_bytes  size of the frame, or 0 if unknown
+ * @return             frame duration, in samples, if known. 0 if not able to
+ *                     determine.
+ */
+int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes);
+
 /* frame parsing */
 typedef struct AVCodecParserContext {
     void *priv_data;