[FFmpeg-cvslog] lavc/qsvenc_jpeg: add async_depth support

[Zhong Li]

ffmpeg | branch: master | Zhong Li <zhong.li at intel.com> | Thu Oct 11 17:26:12 2018 +0800| [4c5e77e0bf14aa3cb838e788dbaf88441c82e5d2] | committer: Luca Barbato

lavc/qsvenc_jpeg: add async_depth support

Currently qsv (m)jpeg encoding is broken.
Regression introducing by the commit(id: c1bcd3): fix async support,
which requires the minimum async_depth to be 1, instead previous zero.
But the default async_depth of qsv (m)jpeg encoding is still initialized
(mostly) as zero.

This patch also abviously improves qsv (m)jpeg encoding performance
due to the default async_depth is changed to 4.

Signed-off-by: Zhong Li <zhong.li at intel.com>
Signed-off-by: Luca Barbato <lu_zero at gentoo.org>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4c5e77e0bf14aa3cb838e788dbaf88441c82e5d2
---

 libavcodec/qsvenc_jpeg.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/qsvenc_jpeg.c b/libavcodec/qsvenc_jpeg.c
index e11b74dc9f..7465bb917f 100644
--- a/libavcodec/qsvenc_jpeg.c
+++ b/libavcodec/qsvenc_jpeg.c
@@ -64,6 +64,7 @@ static av_cold int qsv_enc_close(AVCodecContext *avctx)
 #define OFFSET(x) offsetof(QSVMJPEGEncContext, x)
 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 static const AVOption options[] = {
+    { "async_depth", "Maximum processing parallelism", OFFSET(qsv.async_depth), AV_OPT_TYPE_INT, { .i64 = ASYNC_DEPTH_DEFAULT }, 1, INT_MAX, VE },
     { NULL },
 };