Add a generic function to lavc to log messages about missing features.

Patch by Justin Ruggles (justin ruggles gmail com)

Originally committed as revision 14685 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 13 insertions, 0 deletions

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 599226145a..8ca19aed00 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1513,3 +1513,16 @@ int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
     else
         return 0;
 }
+
+void av_log_missing_feature(void *avc, const char *feature, int want_sample)
+{
+    av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
+            "version to the newest one from SVN. If the problem still "
+            "occurs, it means that your file has a feature which has not "
+            "been implemented.", feature);
+    if(want_sample)
+        av_log(avc, AV_LOG_WARNING, " If you want to help, upload a sample "
+                "of this file to ftp://upload.mplayerhq.hu/MPlayer/incoming/ "
+                "and contact the FFmpeg-devel mailing list.");
+    av_log(avc, AV_LOG_WARNING, "\n");
+}