Add DXVA2 HEVC HWAccel

Signed-off-by: Anton Khirnov <anton@khirnov.net>

configure

@@ -1508,6 +1508,7 @@ TOOLCHAIN_FEATURES="
 
 TYPES_LIST="
     CONDITION_VARIABLE_Ptr
+    DXVA_PicParams_HEVC
     socklen_t
     struct_addrinfo
     struct_group_source_req
@@ -1958,6 +1959,8 @@ h264_vda_old_hwaccel_deps="vda"
 h264_vda_old_hwaccel_select="h264_decoder"
 h264_vdpau_hwaccel_deps="vdpau"
 h264_vdpau_hwaccel_select="h264_decoder"
+hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
+hevc_dxva2_hwaccel_select="hevc_decoder"
 mpeg1_vdpau_hwaccel_deps="vdpau"
 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
 mpeg2_dxva2_hwaccel_deps="dxva2"
@@ -4135,6 +4138,8 @@ check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
 
 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
 
+check_type "windows.h dxva.h" "DXVA_PicParams_HEVC"
+
 if ! disabled w32threads && ! enabled pthreads; then
     check_func_headers "windows.h process.h" _beginthreadex &&
         enable w32threads || disable w32threads

libavcodec/Makefile

@@ -553,6 +553,7 @@ OBJS-$(CONFIG_H264_DXVA2_HWACCEL)         += dxva2_h264.o
 OBJS-$(CONFIG_H264_VAAPI_HWACCEL)         += vaapi_h264.o
 OBJS-$(CONFIG_H264_VDA_HWACCEL)           += vda_h264.o
 OBJS-$(CONFIG_H264_VDPAU_HWACCEL)         += vdpau_h264.o
+OBJS-$(CONFIG_HEVC_DXVA2_HWACCEL)         += dxva2_hevc.o
 OBJS-$(CONFIG_MPEG1_VDPAU_HWACCEL)        += vdpau_mpeg12.o
 OBJS-$(CONFIG_MPEG2_DXVA2_HWACCEL)        += dxva2_mpeg2.o
 OBJS-$(CONFIG_MPEG2_VAAPI_HWACCEL)        += vaapi_mpeg2.o

libavcodec/allcodecs.c

@@ -81,6 +81,7 @@ void avcodec_register_all(void)
     REGISTER_HWACCEL(H264_VDA,          h264_vda);
     REGISTER_HWACCEL(H264_VDA_OLD,      h264_vda_old);
     REGISTER_HWACCEL(H264_VDPAU,        h264_vdpau);
+    REGISTER_HWACCEL(HEVC_DXVA2,        hevc_dxva2);
     REGISTER_HWACCEL(MPEG1_VDPAU,       mpeg1_vdpau);
     REGISTER_HWACCEL(MPEG2_DXVA2,       mpeg2_dxva2);
     REGISTER_HWACCEL(MPEG2_VAAPI,       mpeg2_vaapi);

libavcodec/hevc.c

@@ -385,7 +385,7 @@ static int decode_lt_rps(HEVCContext *s, LongTermRPS *rps, GetBitContext *gb)
 
 static int set_sps(HEVCContext *s, const HEVCSPS *sps)
 {
-    #define HWACCEL_MAX (0)
+    #define HWACCEL_MAX (CONFIG_HEVC_DXVA2_HWACCEL)
     enum AVPixelFormat pix_fmts[HWACCEL_MAX + 2], *fmt = pix_fmts;
     int ret;
     unsigned int num = 0, den = 0;
@@ -401,6 +401,12 @@ static int set_sps(HEVCContext *s, const HEVCSPS *sps)
     s->avctx->height              = sps->output_height;
     s->avctx->has_b_frames        = sps->temporal_layer[sps->max_sub_layers - 1].num_reorder_pics;
 
+    if (sps->pix_fmt == AV_PIX_FMT_YUV420P || sps->pix_fmt == AV_PIX_FMT_YUVJ420P) {
+#if CONFIG_HEVC_DXVA2_HWACCEL
+        *fmt++ = AV_PIX_FMT_DXVA2_VLD;
+#endif
+    }
+
     *fmt++ = sps->pix_fmt;
     *fmt = AV_PIX_FMT_NONE;