[FFmpeg-cvslog] mpeg12: Ignore slice threading if hwaccel is active

[Rémi Denis-Courmont]

ffmpeg | branch: release/1.2 | Rémi Denis-Courmont <remi at remlab.net> | Wed Jul 24 19:50:43 2013 +0300| [70127070dd9f7eef52ed029dd68606b0c8efd137] | committer: Carl Eugen Hoyos

mpeg12: Ignore slice threading if hwaccel is active

Slice threading does not work with hardware acceleration, as decoding
is per-picture.  This fixes Bugzilla #542.

Signed-off-by: Diego Biurrun <diego at biurrun.de>
(cherry picked from commit 93a51984a27f3ba84d4e6f13d0c704ee9891603e)

Conflicts:
	libavcodec/mpeg12dec.c

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=70127070dd9f7eef52ed029dd68606b0c8efd137
---

 libavcodec/mpeg12.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 4021996..7f72f13 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -2277,7 +2277,8 @@ static int decode_chunks(AVCodecContext *avctx,
         buf_ptr = avpriv_mpv_find_start_code(buf_ptr, buf_end, &start_code);
         if (start_code > 0x1ff) {
             if (s2->pict_type != AV_PICTURE_TYPE_B || avctx->skip_frame <= AVDISCARD_DEFAULT) {
-                if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) {
+                if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
+                    !avctx->hwaccel) {
                     int i;
                     av_assert0(avctx->thread_count > 1);
 
@@ -2337,7 +2338,8 @@ static int decode_chunks(AVCodecContext *avctx,
                 s2->intra_dc_precision= 3;
                 s2->intra_matrix[0]= 1;
             }
-            if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) && s->slice_count) {
+            if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
+                !avctx->hwaccel && s->slice_count) {
                 int i;
 
                 avctx->execute(avctx, slice_decode_thread,
@@ -2504,7 +2506,8 @@ static int decode_chunks(AVCodecContext *avctx,
                     break;
                 }
 
-                if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) {
+                if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
+                    !avctx->hwaccel) {
                     int threshold = (s2->mb_height * s->slice_count +
                                      s2->slice_context_count / 2) /
                                     s2->slice_context_count;