[FFmpeg-cvslog] libavcodec/qsvenc.c: fix incorrect loop condition.

[Ivan Uskov]

ffmpeg | branch: master | Ivan Uskov <ivan.uskov at nablet.com> | Tue Jul  7 20:33:36 2015 +0300| [b409748bc4412fa2d8e642585c4e5ab8a4d136cb] | committer: Michael Niedermayer

libavcodec/qsvenc.c: fix incorrect loop condition.

For example, the encoder may return MFX_WRN_INCOMPATIBLE_VIDEO_PARAM warning
i.e. ret==5 old loop implementation will repeat several times until output buffer
overflow. New implementation explicitly uses loop only for device busy case.

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b409748bc4412fa2d8e642585c4e5ab8a4d136cb
---

 libavcodec/qsvenc.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
index dc8b5f2..0666624 100644
--- a/libavcodec/qsvenc.c
+++ b/libavcodec/qsvenc.c
@@ -399,9 +399,12 @@ int ff_qsv_encode(AVCodecContext *avctx, QSVEncContext *q,
 
     do {
         ret = MFXVideoENCODE_EncodeFrameAsync(q->session, NULL, surf, &bs, &sync);
-        if (ret == MFX_WRN_DEVICE_BUSY)
+        if (ret == MFX_WRN_DEVICE_BUSY) {
             av_usleep(1);
-    } while (ret > 0);
+            continue;
+        }
+        break;
+    } while ( 1 );
 
     if (ret < 0)
         return (ret == MFX_ERR_MORE_DATA) ? 0 : ff_qsv_error(ret);