qsvenc_{hevc,h264}: add scenario option

User may get better experience after providing corresponding senario hint
to encoder for the encoding session. See [1] for scenario support in the
SDK

[1]https://github.com/Intel-Media-SDK/MediaSDK/blob/master/doc/mediasdk-man.md#scenarioinfo

doc/encoders.texi

@@ -3503,6 +3503,21 @@ Maximum video quantizer scale for B frame.
 
 @item @var{min_qp_b}
 Minimum video quantizer scale for B frame.
+
+@item @var{scenario}
+Provides a hint to encoder about the scenario for the encoding session.
+@table @samp
+@item unknown
+@item displayremoting
+@item videoconference
+@item archive
+@item livestreaming
+@item cameracapture
+@item videosurveillance
+@item gamestreaming
+@item remotegaming
+@end table
+
 @end table
 
 @subsection HEVC Options
@@ -3651,6 +3666,21 @@ Maximum video quantizer scale for B frame.
 
 @item @var{min_qp_b}
 Minimum video quantizer scale for B frame.
+
+@item @var{scenario}
+Provides a hint to encoder about the scenario for the encoding session.
+@table @samp
+@item unknown
+@item displayremoting
+@item videoconference
+@item archive
+@item livestreaming
+@item cameracapture
+@item videosurveillance
+@item gamestreaming
+@item remotegaming
+@end table
+
 @end table
 
 @subsection MPEG2 Options

libavcodec/qsvenc.c

@@ -337,6 +337,7 @@ static void dump_video_param(AVCodecContext *avctx, QSVEncContext *q,
         av_log(avctx, AV_LOG_VERBOSE, "LowDelayBRC: %s\n", print_threestate(co3->LowDelayBRC));
         av_log(avctx, AV_LOG_VERBOSE, "MaxFrameSizeI: %d; ", co3->MaxFrameSizeI);
         av_log(avctx, AV_LOG_VERBOSE, "MaxFrameSizeP: %d\n", co3->MaxFrameSizeP);
+        av_log(avctx, AV_LOG_VERBOSE, "ScenarioInfo: %"PRId16"\n", co3->ScenarioInfo);
     }
 
     if (exthevctiles) {
@@ -923,6 +924,8 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
                 q->extco3.MaxFrameSizeI = q->max_frame_size_i;
             if (q->max_frame_size_p >= 0)
                 q->extco3.MaxFrameSizeP = q->max_frame_size_p;
+
+            q->extco3.ScenarioInfo = q->scenario;
         }
 
         if (avctx->codec_id == AV_CODEC_ID_HEVC) {

libavcodec/qsvenc.h

@@ -111,6 +111,19 @@
 { "max_qp_b", "Maximum video quantizer scale for B frame",       OFFSET(qsv.max_qp_b),       AV_OPT_TYPE_INT, { .i64 = -1 },  -1,          51, VE},                         \
 { "min_qp_b", "Minimum video quantizer scale for B frame",       OFFSET(qsv.min_qp_b),       AV_OPT_TYPE_INT, { .i64 = -1 },  -1,          51, VE},
 
+#define QSV_OPTION_SCENARIO \
+{ "scenario", "A hint to encoder about the scenario for the encoding session", OFFSET(qsv.scenario), AV_OPT_TYPE_INT, { .i64 = MFX_SCENARIO_UNKNOWN },          \
+  MFX_SCENARIO_UNKNOWN, MFX_SCENARIO_REMOTE_GAMING, VE, "scenario" }, \
+{ "unknown",            NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_SCENARIO_UNKNOWN },            .flags = VE, "scenario" },                                      \
+{ "displayremoting",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_SCENARIO_DISPLAY_REMOTING },   .flags = VE, "scenario" },                                      \
+{ "videoconference",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_SCENARIO_VIDEO_CONFERENCE },   .flags = VE, "scenario" },                                      \
+{ "archive",            NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_SCENARIO_ARCHIVE },            .flags = VE, "scenario" },                                      \
+{ "livestreaming",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_SCENARIO_LIVE_STREAMING },     .flags = VE, "scenario" },                                      \
+{ "cameracapture",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_SCENARIO_CAMERA_CAPTURE },     .flags = VE, "scenario" },                                      \
+{ "videosurveillance",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_SCENARIO_VIDEO_SURVEILLANCE }, .flags = VE, "scenario" },                                      \
+{ "gamestreaming",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_SCENARIO_GAME_STREAMING },     .flags = VE, "scenario" },                                      \
+{ "remotegaming",       NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_SCENARIO_REMOTE_GAMING },      .flags = VE, "scenario" },
+
 extern const AVCodecHWConfigInternal *const ff_qsv_enc_hw_configs[];
 
 typedef int SetEncodeCtrlCB (AVCodecContext *avctx,
@@ -179,6 +192,7 @@ typedef struct QSVEncContext {
     int max_frame_size_p;
     int max_slice_size;
     int dblk_idc;
+    int scenario;
 
     int tile_cols;
     int tile_rows;

libavcodec/qsvenc_h264.c

@@ -114,6 +114,7 @@ static const AVOption options[] = {
     QSV_OPTION_DBLK_IDC
     QSV_OPTION_LOW_DELAY_BRC
     QSV_OPTION_MAX_MIN_QP
+    QSV_OPTION_SCENARIO
 
     { "cavlc",          "Enable CAVLC",                           OFFSET(qsv.cavlc),          AV_OPT_TYPE_BOOL, { .i64 = 0 },   0,          1, VE },
 #if QSV_HAVE_VCM

libavcodec/qsvenc_hevc.c

@@ -235,6 +235,7 @@ static const AVOption options[] = {
     QSV_OPTION_MAX_MIN_QP
     QSV_OPTION_ADAPTIVE_I
     QSV_OPTION_ADAPTIVE_B
+    QSV_OPTION_SCENARIO
 
     { "idr_interval", "Distance (in I-frames) between IDR frames", OFFSET(qsv.idr_interval), AV_OPT_TYPE_INT, { .i64 = 0 }, -1, INT_MAX, VE, "idr_interval" },
     { "begin_only", "Output an IDR-frame only at the beginning of the stream", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, 0, 0, VE, "idr_interval" },