lavc/qsvenc: pass the color properties to the SDK

Otherwise the color properties won't be encoded into the bitstream
header

Reviewed-by: Xiang, Haihao <haihao.xiang@intel.com>
Reviewed-by: Soft Works <softworkz@hotmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

libavcodec/qsvenc.c

@@ -805,6 +805,24 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
     }
 #endif
 
+    q->extvsi.VideoFullRange = (avctx->color_range == AVCOL_RANGE_JPEG);
+    q->extvsi.ColourDescriptionPresent = 0;
+
+    if (avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
+        avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
+        avctx->colorspace != AVCOL_SPC_UNSPECIFIED) {
+        q->extvsi.ColourDescriptionPresent = 1;
+        q->extvsi.ColourPrimaries = avctx->color_primaries;
+        q->extvsi.TransferCharacteristics = avctx->color_trc;
+        q->extvsi.MatrixCoefficients = avctx->colorspace;
+    }
+
+    if (q->extvsi.VideoFullRange || q->extvsi.ColourDescriptionPresent) {
+        q->extvsi.Header.BufferId = MFX_EXTBUFF_VIDEO_SIGNAL_INFO;
+        q->extvsi.Header.BufferSz = sizeof(q->extvsi);
+        q->extparam_internal[q->nb_extparam_internal++] = (mfxExtBuffer *)&q->extvsi;
+    }
+
     if (!check_enc_param(avctx,q)) {
         av_log(avctx, AV_LOG_ERROR,
                "some encoding parameters are not supported by the QSV "

libavcodec/qsvenc.h

@@ -139,7 +139,9 @@ typedef struct QSVEncContext {
     mfxFrameSurface1       **opaque_surfaces;
     AVBufferRef             *opaque_alloc_buf;
 
-    mfxExtBuffer  *extparam_internal[2 + QSV_HAVE_CO2 + QSV_HAVE_CO3 + (QSV_HAVE_MF * 2)];
+    mfxExtVideoSignalInfo extvsi;
+
+    mfxExtBuffer  *extparam_internal[3 + QSV_HAVE_CO2 + QSV_HAVE_CO3 + (QSV_HAVE_MF * 2)];
     int         nb_extparam_internal;
 
     mfxExtBuffer **extparam;