[FFmpeg-devel] [PATCH 3/6] libavcodec/qsvenc: Add "slice" intra refresh type to qsvenc

[Wenbin Chen <wenbin.chen-at-intel.com@ffmpeg.org>]

Add "slice" intra refresh type to h264_qsv and hevc_qsv. This type means
horizontal refresh by slices without overlapping. Also update the doc.

Signed-off-by: Wenbin Chen <wenbin.chen@intel.com>
---
 doc/encoders.texi        | 12 ++++++++----
 libavcodec/qsvenc_h264.c |  1 +
 libavcodec/qsvenc_hevc.c |  1 +
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/doc/encoders.texi b/doc/encoders.texi
index 9fb63856b1..48fe73fd33 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -3454,8 +3454,10 @@ Specifies intra refresh type. The major goal of intra refresh is improvement of
 error resilience without significant impact on encoded bitstream size caused by
 I frames. The SDK encoder achieves this by encoding part of each frame in
 refresh cycle using intra MBs. @var{none} means no refresh. @var{vertical} means
-vertical refresh, by column of MBs. To enable intra refresh, B frame should be
-set to 0.
+vertical refresh, by column of MBs. @var{horizontal} means horizontal refresh,
+by rows of MBs. @var{slice} means horizontal refresh by slices without
+overlapping. In case of @var{slice}, in_ref_cycle_size is ignored. To enable
+intra refresh, B frame should be set to 0.
 
 @item @var{int_ref_cycle_size}
 Specifies number of pictures within refresh cycle starting from 2. 0 and 1 are
@@ -3619,8 +3621,10 @@ Specifies intra refresh type. The major goal of intra refresh is improvement of
 error resilience without significant impact on encoded bitstream size caused by
 I frames. The SDK encoder achieves this by encoding part of each frame in
 refresh cycle using intra MBs. @var{none} means no refresh. @var{vertical} means
-vertical refresh, by column of MBs. To enable intra refresh, B frame should be
-set to 0.
+vertical refresh, by column of MBs. @var{horizontal} means horizontal refresh,
+by rows of MBs. @var{slice} means horizontal refresh by slices without
+overlapping. In case of @var{slice}, in_ref_cycle_size is ignored. To enable
+intra refresh, B frame should be set to 0.
 
 @item @var{int_ref_cycle_size}
 Specifies number of pictures within refresh cycle starting from 2. 0 and 1 are
diff --git a/libavcodec/qsvenc_h264.c b/libavcodec/qsvenc_h264.c
index ad9cf629df..b589fccc89 100644
--- a/libavcodec/qsvenc_h264.c
+++ b/libavcodec/qsvenc_h264.c
@@ -138,6 +138,7 @@ static const AVOption options[] = {
         { "none",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, .flags = VE, "int_ref_type" },
         { "vertical", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, .flags = VE, "int_ref_type" },
         { "horizontal", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, .flags = VE, "int_ref_type" },
+        { "slice"     , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, .flags = VE, "int_ref_type" },
     { "int_ref_cycle_size", "Number of frames in the intra refresh cycle",       OFFSET(qsv.int_ref_cycle_size),      AV_OPT_TYPE_INT, { .i64 = -1 },               -1, UINT16_MAX, VE },
     { "int_ref_qp_delta",   "QP difference for the refresh MBs",                 OFFSET(qsv.int_ref_qp_delta),        AV_OPT_TYPE_INT, { .i64 = INT16_MIN }, INT16_MIN,  INT16_MAX, VE },
     { "recovery_point_sei", "Insert recovery point SEI messages",                OFFSET(qsv.recovery_point_sei),      AV_OPT_TYPE_INT, { .i64 = -1 },               -1,          1, VE },
diff --git a/libavcodec/qsvenc_hevc.c b/libavcodec/qsvenc_hevc.c
index e11f5dec4a..8fcf8b2cef 100644
--- a/libavcodec/qsvenc_hevc.c
+++ b/libavcodec/qsvenc_hevc.c
@@ -267,6 +267,7 @@ static const AVOption options[] = {
         { "none",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, .flags = VE, "int_ref_type" },
         { "vertical", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, .flags = VE, "int_ref_type" },
         { "horizontal", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, .flags = VE, "int_ref_type" },
+        { "slice"     , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, .flags = VE, "int_ref_type" },
     { "int_ref_cycle_size", "Number of frames in the intra refresh cycle",       OFFSET(qsv.int_ref_cycle_size),      AV_OPT_TYPE_INT, { .i64 = -1 },               -1, UINT16_MAX, VE },
     { "int_ref_qp_delta",   "QP difference for the refresh MBs",                 OFFSET(qsv.int_ref_qp_delta),        AV_OPT_TYPE_INT, { .i64 = INT16_MIN }, INT16_MIN,  INT16_MAX, VE },
     { "int_ref_cycle_dist",   "Distance between the beginnings of the intra-refresh cycles in frames",  OFFSET(qsv.int_ref_cycle_dist),      AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT16_MAX, VE },
-- 
2.32.0

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