lavf: VAAPI scale filter

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

Changelog

@@ -51,6 +51,7 @@ version <next>:
 - support Apple AVFoundation video capture
 - G.723.1 muxer and encoder
 - compressed SWF
+- VAAPI-accelerated format conversion and scaling
 
 
 version 11:

configure

@@ -2359,6 +2359,7 @@ interlace_filter_deps="gpl"
 ocv_filter_deps="libopencv"
 resample_filter_deps="avresample"
 scale_filter_deps="swscale"
+scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
 
 # examples
 avcodec_example_deps="avcodec avutil"
@@ -4457,6 +4458,8 @@ check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMIL
 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
 
+check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
+
 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
 
 if ! disabled w32threads && ! enabled pthreads; then

libavfilter/Makefile

@@ -71,6 +71,7 @@ OBJS-$(CONFIG_OVERLAY_FILTER)                += vf_overlay.o
 OBJS-$(CONFIG_PAD_FILTER)                    += vf_pad.o
 OBJS-$(CONFIG_PIXDESCTEST_FILTER)            += vf_pixdesctest.o
 OBJS-$(CONFIG_SCALE_FILTER)                  += vf_scale.o
+OBJS-$(CONFIG_SCALE_VAAPI_FILTER)            += vf_scale_vaapi.o
 OBJS-$(CONFIG_SELECT_FILTER)                 += vf_select.o
 OBJS-$(CONFIG_SETDAR_FILTER)                 += vf_aspect.o
 OBJS-$(CONFIG_SETPTS_FILTER)                 += setpts.o

libavfilter/allfilters.c

@@ -97,6 +97,7 @@ void avfilter_register_all(void)
     REGISTER_FILTER(PAD,            pad,            vf);
     REGISTER_FILTER(PIXDESCTEST,    pixdesctest,    vf);
     REGISTER_FILTER(SCALE,          scale,          vf);
+    REGISTER_FILTER(SCALE_VAAPI,    scale_vaapi,    vf);
     REGISTER_FILTER(SELECT,         select,         vf);
     REGISTER_FILTER(SETDAR,         setdar,         vf);
     REGISTER_FILTER(SETPTS,         setpts,         vf);