libavcodec/qsvenc_hevc: add tier option

Without this change, MSDK/VPL always defaults the HEVC tier to MAIN if the -level is specified.
Also, according to the HEVC specs, only level >= 4 can support High Tier.

Signed-off-by: nyanmisaka <nst799610810@gmail.com>

libavcodec/qsvenc.c

@@ -709,8 +709,11 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
         return AVERROR_BUG;
     q->param.mfx.CodecId = ret;
 
-    if (avctx->level > 0)
+    if (avctx->level > 0) {
         q->param.mfx.CodecLevel = avctx->level;
+        if (avctx->codec_id == AV_CODEC_ID_HEVC && avctx->level >= MFX_LEVEL_HEVC_4)
+            q->param.mfx.CodecLevel |= q->tier;
+    }
 
     if (avctx->compression_level == FF_COMPRESSION_DEFAULT) {
         avctx->compression_level = q->preset;

libavcodec/qsvenc.h

@@ -185,6 +185,7 @@ typedef struct QSVEncContext {
     int async_depth;
     int idr_interval;
     int profile;
+    int tier;
     int preset;
     int avbr_accuracy;
     int avbr_convergence;

libavcodec/qsvenc_hevc.c

@@ -338,6 +338,9 @@ static const AVOption options[] = {
 #if QSV_VERSION_ATLEAST(1, 32)
     { "scc",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_SCC     }, INT_MIN, INT_MAX,     VE, "profile" },
 #endif
+    { "tier",    "Set the encoding tier (only level >= 4 can support high tier)", OFFSET(qsv.tier), AV_OPT_TYPE_INT, { .i64 = MFX_TIER_HEVC_HIGH }, MFX_TIER_HEVC_MAIN, MFX_TIER_HEVC_HIGH, VE, "tier" },
+    { "main",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_TIER_HEVC_MAIN       }, INT_MIN, INT_MAX,     VE, "tier" },
+    { "high",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_TIER_HEVC_HIGH       }, INT_MIN, INT_MAX,     VE, "tier" },
 
     { "gpb", "1: GPB (generalized P/B frame); 0: regular P frame", OFFSET(qsv.gpb), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE},