From 60aaf044f3fdbeb1cf702b144cb0597ce4988020 Mon Sep 17 00:00:00 2001
From: Marton Balint <cus@passwd.hu>
Date: Sun, 2 Oct 2011 16:28:36 +0200
Subject: [PATCH] audioconvert: add av_get_default_channel_layout public
 function

---
 libavutil/audioconvert.c | 8 ++++++++
 libavutil/audioconvert.h | 5 +++++
 2 files changed, 13 insertions(+)

diff --git a/libavutil/audioconvert.c b/libavutil/audioconvert.c
index 524f6f9e9e..4a8794276e 100644
--- a/libavutil/audioconvert.c
+++ b/libavutil/audioconvert.c
@@ -131,3 +131,11 @@ int av_get_channel_layout_nb_channels(int64_t channel_layout)
         x &= x-1; // unset lowest set bit
     return count;
 }
+
+int av_get_default_channel_layout(int nb_channels) {
+    int i;
+    for (i = 0; channel_layout_map[i].name; i++)
+        if (nb_channels == channel_layout_map[i].nb_channels)
+            return channel_layout_map[i].layout;
+    return 0;
+}
diff --git a/libavutil/audioconvert.h b/libavutil/audioconvert.h
index 134c6107c9..03965ccc7d 100644
--- a/libavutil/audioconvert.h
+++ b/libavutil/audioconvert.h
@@ -92,4 +92,9 @@ void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, int6
  */
 int av_get_channel_layout_nb_channels(int64_t channel_layout);
 
+/**
+ * Return default channel layout for a given number of channels.
+ */
+int av_get_default_channel_layout(int nb_channels);
+
 #endif /* AVUTIL_AUDIOCONVERT_H */