[FFmpeg-cvslog] avcodec/h264: Fix off by 1 context count

[Michael Niedermayer]

ffmpeg | branch: release/3.0 | Michael Niedermayer <michael at niedermayer.cc> | Tue Jun  7 22:17:38 2016 +0200| [e7a064efa6ac4076eb475be4a2c487fe50e31f48] | committer: Michael Niedermayer

avcodec/h264: Fix off by 1 context count

Fixes fate-h264-xavc-4389 with slice threads
(cherry picked from commit 27c1eae55f24e9ed005a6634cd4ddd867118fa48)

Conflicts:

	libavcodec/h264.c

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e7a064efa6ac4076eb475be4a2c487fe50e31f48
---

 libavcodec/h264.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 88768af..b1001f8 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -1656,12 +1656,10 @@ again:
                     av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
                 sl->ref_count[0] = sl->ref_count[1] = sl->list_count = 0;
             } else if (err == SLICE_SINGLETHREAD) {
-                if (context_count > 1) {
-                    ret = ff_h264_execute_decode_slices(h, context_count - 1);
-                    if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
-                        goto end;
-                    context_count = 0;
-                }
+                ret = ff_h264_execute_decode_slices(h, context_count);
+                if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
+                    goto end;
+                context_count = 0;
                 /* Slice could not be decoded in parallel mode, restart. Note
                  * that rbsp_buffer is not transferred, but since we no longer
                  * run in parallel mode this should not be an issue. */