[FFmpeg-devel] [PATCH 2/2] libavcodec/qsvenc_av1: Add max_frame_size support to av1_qsv encoder

[wenbin.chen-at-intel.com@ffmpeg.org]

From: Wenbin Chen <wenbin.chen@intel.com>

Signed-off-by: Wenbin Chen <wenbin.chen@intel.com>
---
 doc/encoders.texi       | 5 +++++
 libavcodec/qsvenc.c     | 3 +++
 libavcodec/qsvenc_av1.c | 1 +
 3 files changed, 9 insertions(+)

diff --git a/doc/encoders.texi b/doc/encoders.texi
index 543b5e26a9..727f12a59d 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -3855,6 +3855,11 @@ Depth of look ahead in number frames, available when extbrc option is enabled.
 Setting this flag turns on or off LowDelayBRC feautre in qsv plugin, which provides
 more accurate bitrate control to minimize the variance of bitstream size frame
 by frame. Value: -1-default 0-off 1-on
+
+@item max_frame_size
+Set the allowed max size in bytes for each frame. If the frame size exceeds
+the limitation, encoder will adjust the QP value to control the frame size.
+Invalid in CQP rate control mode.
 @end table
 
 @section snow
diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
index f5c6a164bb..93f1862a4b 100644
--- a/libavcodec/qsvenc.c
+++ b/libavcodec/qsvenc.c
@@ -538,6 +538,7 @@ static void dump_video_av1_param(AVCodecContext *avctx, QSVEncContext *q,
     av_log(avctx, AV_LOG_VERBOSE, "WriteIVFHeaders: %s \n",
            print_threestate(av1_bs_param->WriteIVFHeaders));
     av_log(avctx, AV_LOG_VERBOSE, "LowDelayBRC: %s\n", print_threestate(co3->LowDelayBRC));
+    av_log(avctx, AV_LOG_VERBOSE, "MaxFrameSize: %d;\n", co2->MaxFrameSize);
 }
 #endif
 
@@ -1034,6 +1035,8 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
                 q->extco2.AdaptiveI = q->adaptive_i ? MFX_CODINGOPTION_ON : MFX_CODINGOPTION_OFF;
             if (q->adaptive_b >= 0)
                 q->extco2.AdaptiveB = q->adaptive_b ? MFX_CODINGOPTION_ON : MFX_CODINGOPTION_OFF;
+            if (q->max_frame_size >= 0)
+                q->extco2.MaxFrameSize = q->max_frame_size;
 
             q->extco2.Header.BufferId = MFX_EXTBUFF_CODING_OPTION2;
             q->extco2.Header.BufferSz = sizeof(q->extco2);
diff --git a/libavcodec/qsvenc_av1.c b/libavcodec/qsvenc_av1.c
index 1e7801fefe..c697845d7b 100644
--- a/libavcodec/qsvenc_av1.c
+++ b/libavcodec/qsvenc_av1.c
@@ -111,6 +111,7 @@ static const AVOption options[] = {
     QSV_OPTION_ADAPTIVE_B
     QSV_OPTION_EXTBRC
     QSV_OPTION_LOW_DELAY_BRC
+    QSV_OPTION_MAX_FRAME_SIZE
     { "profile", NULL, OFFSET(qsv.profile), AV_OPT_TYPE_INT, { .i64 = MFX_PROFILE_UNKNOWN }, 0, INT_MAX, VE, "profile" },
         { "unknown" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_UNKNOWN      }, INT_MIN, INT_MAX,     VE, "profile" },
         { "main"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_AV1_MAIN     }, INT_MIN, INT_MAX,     VE, "profile" },
-- 
2.34.1

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