Merge remote-tracking branch 'qatar/master'

* qatar/master:
  libmp3lame: add missing layout terminator
  avconv: multithreaded demuxing.
  Bump lavu minor and add an APIChanges entry for audioconvert functions.
  audioconvert: add a function for extracting the channel with the given index
  audioconvert: add a function for getting the name of a single channel.
  audioconvert: add a function for getting channel's index in layout
  audioconvert: use av_popcount64 in av_get_channel_layout_nb_channels
  vf_libopencv: add missing headers.
  iac: add missing dependency

Conflicts:
	configure
	doc/APIchanges
	ffmpeg.c
	libavcodec/libmp3lame.c
	libavutil/avutil.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 24 insertions, 0 deletions

diff --git a/libavutil/audioconvert.h b/libavutil/audioconvert.h
index 319cc8ab71..03e080cb26 100644
--- a/libavutil/audioconvert.h
+++ b/libavutil/audioconvert.h
@@ -150,6 +150,30 @@ int av_get_channel_layout_nb_channels(uint64_t channel_layout);
 int64_t av_get_default_channel_layout(int nb_channels);
 
 /**
+ * Get the index of a channel in channel_layout.
+ *
+ * @param channel a channel layout describing exactly one channel which must be
+ *                present in channel_layout.
+ *
+ * @return index of channel in channel_layout on success, a negative AVERROR
+ *         on error.
+ */
+int av_get_channel_layout_channel_index(uint64_t channel_layout,
+                                        uint64_t channel);
+
+/**
+ * Get the channel with the given index in channel_layout.
+ */
+uint64_t av_channel_layout_extract_channel(uint64_t channel_layout, int index);
+
+/**
+ * Get the name of a given channel.
+ *
+ * @return channel name on success, NULL on error.
+ */
+const char *av_get_channel_name(uint64_t channel);
+
+/**
  * @}
  */