X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=mp.c;h=b5fa9cacaa6dcf9f3e2ef6f99fd025757f12097c;hp=416b4f92065ef79716e7f966c3102e995071a112;hb=8d36eb43da27bef1e7bc3d626f46cb4c92ca2a41;hpb=fed61968a113bd37b196bb86d9f2591d53b15162

diff --git a/mp.c b/mp.c
index 416b4f92..b5fa9cac 100644
--- a/mp.c
+++ b/mp.c
@@ -389,6 +389,27 @@ MP_AFHI(frequency)
 MP_AFHI(channels)
 /** \endcond */
 
+/**
+ * Return the duration of the audio file from the afh info structure.
+ *
+ * \param ctx See \ref mp_path().
+ *
+ * The duration is computed by multiplying the number of chunks and the
+ * duration of one chunk.
+ *
+ * \return The approximate number of milliseconds.
+ */
+int64_t mp_duration(struct mp_context *ctx)
+{
+	struct timeval tmp;
+	int ret = get_afhi(ctx);
+
+	if (ret < 0)
+		return 0;
+	tv_scale(ctx->afhi.chunks_total, &ctx->afhi.chunk_tv, &tmp);
+	return tv2ms(&tmp);
+}
+
 /**
  * Define a function which extracts and returns the value of a meta tag.
  *