[FFmpeg-cvslog] swresample: add SwrContext doxy

[Timothy Gu]

ffmpeg | branch: master | Timothy Gu <timothygu99 at gmail.com> | Sun Jul  6 09:53:53 2014 -0700| [77c5f546e7619a5b83976c69a9cc36b23edb1ca2] | committer: Michael Niedermayer

swresample: add SwrContext doxy

Signed-off-by: Timothy Gu <timothygu99 at gmail.com>
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=77c5f546e7619a5b83976c69a9cc36b23edb1ca2
---

 libswresample/swresample.h |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libswresample/swresample.h b/libswresample/swresample.h
index 27526ef..5977c9c 100644
--- a/libswresample/swresample.h
+++ b/libswresample/swresample.h
@@ -149,6 +149,12 @@ enum SwrFilterType {
  * @}
  */
 
+/**
+ * The libswresample context. Unlike libavcodec and libavformat, this structure
+ * is opaque. This means that if you would like to set options, you must use
+ * the @ref avoptions API and cannot directly set values to members of the
+ * structure.
+ */
 typedef struct SwrContext SwrContext;
 
 /**