Merge remote-tracking branch 'qatar/master'

* qatar/master:
  ARM: ac3: update ff_ac3_extract_exponents_neon per 8b7b2d6
  ARM: NEON optimised vector_clip_int32()
  swscale: disable full_chroma_int when converting to non-24/32bpp RGB.
  suggest to use av_get_bytes_per_sample() in av_get_bits_per_sample_format() doxy
  ffmpeg: use av_get_bytes_per_sample() in place of av_get_bits_per_sample_fmt()
  put_bits: remove ALT_BITSTREAM_WRITER
  put_bits: always use intreadwrite.h macros
  libavformat: Add an example how to use the metadata API
  doxygen: Prefer member groups over grouping into modules
  doxygen: be more permissive when searching for API examples
  avformat: doxify the Metadata API
  lavf: restore old behavior for custom AVIOContex with an AVFMT_NOFILE format.
  lavf: use the correct pointer in av_open_input_stream().
  avidec: infer absolute vs relative index from first packet

Conflicts:
	libavformat/Makefile
	libavformat/avidec.c

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

libavcodec/avcodec.h

@@ -2535,7 +2535,7 @@ typedef struct AVCodecContext {
 
 #if FF_API_FLAC_GLOBAL_OPTS
     /**
-     * @defgroup flac_opts FLAC options
+     * @name FLAC options
      * @deprecated Use FLAC encoder private options instead.
      * @{
      */
@@ -2957,7 +2957,7 @@ typedef struct AVCodec {
     const AVProfile *profiles;              ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
 
     /**
-     * @defgroup framethreading Frame-level threading support functions.
+     * @name Frame-level threading support functions
      * @{
      */
     /**
@@ -3915,7 +3915,7 @@ int av_get_bits_per_sample(enum CodecID codec_id);
 
 #if FF_API_OLD_SAMPLE_FMT
 /**
- * @deprecated Use av_get_bits_per_sample_fmt() instead.
+ * @deprecated Use av_get_bytes_per_sample() instead.
  */
 attribute_deprecated
 int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt);