[FFmpeg-devel] [PATCH 2/6] libavcodec/qsvenc: Add gop_size reset support to qsvenc

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

Signed-off-by: Wenbin Chen <wenbin.chen@intel.com>
---
 doc/encoders.texi   |  3 +++
 libavcodec/qsvenc.c | 18 +++++++++++++++++-
 libavcodec/qsvenc.h |  2 ++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/doc/encoders.texi b/doc/encoders.texi
index 69fa46f3ea..9fb63856b1 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -3348,6 +3348,9 @@ Change these value to reset qsv codec's qp configuration.
 @item @var{max_frame_size}
 Supported in h264_qsv and hevc_qsv.
 Change this value to reset qsv codec's MaxFrameSize configuration.
+
+@item @var{gop_size}
+Change this value to reset qsv codec's gop configuration.
 @end table
 
 @subsection H264 options
diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
index c911b81e7d..b3820e4fe0 100644
--- a/libavcodec/qsvenc.c
+++ b/libavcodec/qsvenc.c
@@ -635,6 +635,7 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
     q->param.mfx.CodecProfile       = q->profile;
     q->param.mfx.TargetUsage        = avctx->compression_level;
     q->param.mfx.GopPicSize         = FFMAX(0, avctx->gop_size);
+    q->old_gop_size                 = avctx->gop_size;
     q->param.mfx.GopRefDist         = FFMAX(-1, avctx->max_b_frames) + 1;
     q->param.mfx.GopOptFlag         = avctx->flags & AV_CODEC_FLAG_CLOSED_GOP ?
                                       MFX_GOP_CLOSED : MFX_GOP_STRICT;
@@ -1692,16 +1693,31 @@ static int update_max_frame_size(AVCodecContext *avctx, QSVEncContext *q)
     return updated;
 }
 
+static int update_gop_size(AVCodecContext *avctx, QSVEncContext *q)
+{
+    int updated = 0;
+    UPDATE_PARAM(q->old_gop_size, avctx->gop_size);
+    if (!updated)
+        return 0;
+
+    q->param.mfx.GopPicSize = FFMAX(0, avctx->gop_size);
+    av_log(avctx, AV_LOG_DEBUG, "reset GopPicSize to %d\n",
+           q->param.mfx.GopPicSize);
+
+    return updated;
+}
+
 static int update_parameters(AVCodecContext *avctx, QSVEncContext *q,
                              const AVFrame *frame)
 {
     int needReset = 0, ret = 0;
 
-    if (!frame)
+    if (!frame || avctx->codec_id == AV_CODEC_ID_MJPEG)
         return 0;
 
     needReset = update_qp(avctx, q);
     needReset |= update_max_frame_size(avctx, q);
+    needReset |= update_gop_size(avctx, q);
     if (!needReset)
         return 0;
 
diff --git a/libavcodec/qsvenc.h b/libavcodec/qsvenc.h
index c452c5b806..fdedae28dd 100644
--- a/libavcodec/qsvenc.h
+++ b/libavcodec/qsvenc.h
@@ -237,6 +237,8 @@ typedef struct QSVEncContext {
     float old_b_quant_offset;
     // This is used for max_frame_size reset
     int old_max_frame_size;
+    // This is used for gop reset
+    int old_gop_size;
 } QSVEncContext;
 
 int ff_qsv_enc_init(AVCodecContext *avctx, QSVEncContext *q);
-- 
2.32.0

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