lavc/qsvenc: add Tiles encode support for HEVC

Add -tile_rows and -tile_cols option to specify the number of tile rows
and columns for ICL+ (gen 11) platform.

A tile must wholly contain all the slices within it. Slices cannot cross
tile boundaries. So the slice number would be implicitly resized to the
max(nSlice, nTile).

Example:
    ffmpeg -v verbose -hwaccel qsv -init_hw_device qsv=hw
    -filter_hw_device hw -f rawvideo -s:v 1920x1080 -i ./input.nv12 -vf
    format=nv12,hwupload=extra_hw_frames=64 -c:v hevc_qsv -tile_rows 2
    -tile_cols 2 -slices 4 -y output.h265

Also dump the actual quantity of encoded tiled rows and columns in run
time.

Fix the enhancement #8400.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>

libavcodec/qsvenc.c

@@ -139,6 +139,9 @@ static void dump_video_param(AVCodecContext *avctx, QSVEncContext *q,
 #if QSV_HAVE_CO3
     mfxExtCodingOption3 *co3 = (mfxExtCodingOption3*)coding_opts[2];
 #endif
+#if QSV_HAVE_EXT_HEVC_TILES
+    mfxExtHEVCTiles *exthevctiles = (mfxExtHEVCTiles *)coding_opts[3 + QSV_HAVE_CO_VPS];
+#endif
 
     av_log(avctx, AV_LOG_VERBOSE, "profile: %s; level: %"PRIu16"\n",
            print_profile(info->CodecProfile), info->CodecLevel);
@@ -204,6 +207,12 @@ static void dump_video_param(AVCodecContext *avctx, QSVEncContext *q,
     av_log(avctx, AV_LOG_VERBOSE, "RateDistortionOpt: %s\n",
            print_threestate(co->RateDistortionOpt));
 
+#if QSV_HAVE_EXT_HEVC_TILES
+    if (avctx->codec_id == AV_CODEC_ID_HEVC)
+        av_log(avctx, AV_LOG_VERBOSE, "NumTileColumns: %"PRIu16"; NumTileRows: %"PRIu16"\n",
+               exthevctiles->NumTileColumns, exthevctiles->NumTileRows);
+#endif
+
 #if QSV_HAVE_CO2
     av_log(avctx, AV_LOG_VERBOSE,
            "RecoveryPointSEI: %s IntRefType: %"PRIu16"; IntRefCycleSize: %"PRIu16"; IntRefQPDelta: %"PRId16"\n",
@@ -771,6 +780,16 @@ FF_ENABLE_DEPRECATION_WARNINGS
     }
 #endif
 
+#if QSV_HAVE_EXT_HEVC_TILES
+    if (avctx->codec_id == AV_CODEC_ID_HEVC) {
+        q->exthevctiles.Header.BufferId = MFX_EXTBUFF_HEVC_TILES;
+        q->exthevctiles.Header.BufferSz = sizeof(q->exthevctiles);
+        q->exthevctiles.NumTileColumns  = q->tile_cols;
+        q->exthevctiles.NumTileRows     = q->tile_rows;
+        q->extparam_internal[q->nb_extparam_internal++] = (mfxExtBuffer *)&q->exthevctiles;
+    }
+#endif
+
     if (!check_enc_param(avctx,q)) {
         av_log(avctx, AV_LOG_ERROR,
                "some encoding parameters are not supported by the QSV "
@@ -889,7 +908,14 @@ static int qsv_retrieve_enc_params(AVCodecContext *avctx, QSVEncContext *q)
     };
 #endif
 
-    mfxExtBuffer *ext_buffers[2 + QSV_HAVE_CO2 + QSV_HAVE_CO3 + QSV_HAVE_CO_VPS];
+#if QSV_HAVE_EXT_HEVC_TILES
+    mfxExtHEVCTiles hevc_tile_buf = {
+         .Header.BufferId = MFX_EXTBUFF_HEVC_TILES,
+         .Header.BufferSz = sizeof(hevc_tile_buf),
+    };
+#endif
+
+    mfxExtBuffer *ext_buffers[2 + QSV_HAVE_CO2 + QSV_HAVE_CO3 + QSV_HAVE_CO_VPS + QSV_HAVE_EXT_HEVC_TILES];
 
     int need_pps = avctx->codec_id != AV_CODEC_ID_MPEG2VIDEO;
     int ret, ext_buf_num = 0, extradata_offset = 0;
@@ -907,6 +933,10 @@ static int qsv_retrieve_enc_params(AVCodecContext *avctx, QSVEncContext *q)
     if (q->hevc_vps)
         ext_buffers[ext_buf_num++] = (mfxExtBuffer*)&extradata_vps;
 #endif
+#if QSV_HAVE_EXT_HEVC_TILES
+    if (avctx->codec_id == AV_CODEC_ID_HEVC)
+        ext_buffers[ext_buf_num++] = (mfxExtBuffer*)&hevc_tile_buf;
+#endif
 
     q->param.ExtParam    = ext_buffers;
     q->param.NumExtParam = ext_buf_num;

libavcodec/qsvenc.h

@@ -38,6 +38,7 @@
 #define QSV_HAVE_CO3 QSV_VERSION_ATLEAST(1, 11)
 #define QSV_HAVE_CO_VPS  QSV_VERSION_ATLEAST(1, 17)
 
+#define QSV_HAVE_EXT_HEVC_TILES QSV_VERSION_ATLEAST(1, 13)
 #define QSV_HAVE_EXT_VP9_PARAM QSV_VERSION_ATLEAST(1, 26)
 
 #define QSV_HAVE_TRELLIS QSV_VERSION_ATLEAST(1, 8)
@@ -124,6 +125,9 @@ typedef struct QSVEncContext {
     mfxExtMultiFrameParam   extmfp;
     mfxExtMultiFrameControl extmfc;
 #endif
+#if QSV_HAVE_EXT_HEVC_TILES
+    mfxExtHEVCTiles exthevctiles;
+#endif
 #if QSV_HAVE_EXT_VP9_PARAM
     mfxExtVP9Param  extvp9param;
 #endif
@@ -161,6 +165,9 @@ typedef struct QSVEncContext {
     int max_frame_size;
     int max_slice_size;
 
+    int tile_cols;
+    int tile_rows;
+
     int aud;
 
     int single_sei_nal_unit;

libavcodec/qsvenc_hevc.c

@@ -243,6 +243,9 @@ static const AVOption options[] = {
 
     { "gpb", "1: GPB (generalized P/B frame); 0: regular P frame", OFFSET(qsv.gpb), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE},
 
+    { "tile_cols",  "Number of columns for tiled encoding",   OFFSET(qsv.tile_cols),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, UINT16_MAX, VE },
+    { "tile_rows",  "Number of rows for tiled encoding",      OFFSET(qsv.tile_rows),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, UINT16_MAX, VE },
+
     { NULL },
 };