A combination DXVA2.0 using ffmpeg sample program for hardware decoding. Believe the code inside can give you a good idea.

dxva2_test12_CPU\Debug
................\dxva2_test.sln
................\dxva2_test.suo
................\dxva2_test
................\..........\avcodec-54.dll
................\..........\avdevice-54.dll
................\..........\avfilter-3.dll
................\..........\avformat-54.dll
................\..........\avutil-51.dll
................\..........\avutil-52.dll
................\..........\Debug
................\..........\.....\dxva2_test.Build.CppClean.log
................\..........\.....\dxva2_test.log
................\..........\dxva2_test.cpp
................\..........\dxva2_test.h
................\..........\dxva2_test.vcxproj
................\..........\dxva2_test.vcxproj.filters
................\..........\dxva2_test.vcxproj.user
................\..........\ffpresets
................\..........\.........\libvpx-1080p.ffpreset
................\..........\.........\libvpx-1080p50_60.ffpreset
................\..........\.........\libvpx-360p.ffpreset
................\..........\.........\libvpx-720p.ffpreset
................\..........\.........\libvpx-720p50_60.ffpreset
................\..........\inttypes.h
................\..........\lib
................\..........\...\avcodec.lib
................\..........\...\avdevice.lib
................\..........\...\avfilter.lib
................\..........\...\avformat.lib
................\..........\...\avutil.lib
................\..........\...\postproc.lib
................\..........\...\swresample.lib
................\..........\...\swscale.lib
................\..........\libavcodec
................\..........\..........\avcodec.h
................\..........\..........\avfft.h
................\..........\..........\dxva2.h
................\..........\..........\old_codec_ids.h
................\..........\..........\opendecode.h
................\..........\..........\openencode.h
................\..........\..........\opt.h
................\..........\..........\vaapi.h
................\..........\..........\vadxva2.h
................\..........\..........\vaopendecode.h
................\..........\..........\vda.h
................\..........\..........\vdpau.h
................\..........\..........\version.h
................\..........\..........\xvmc.h
................\..........\libavdevice
................\..........\...........\avdevice.h
................\..........\...........\version.h
................\..........\libavfilter
................\..........\...........\asrc_abuffer.h
................\..........\...........\avcodec.h
................\..........\...........\avfilter.h
................\..........\...........\avfiltergraph.h
................\..........\...........\buffersink.h
................\..........\...........\buffersrc.h
................\..........\...........\version.h
................\..........\...........\vsrc_buffer.h
................\..........\libavformat
................\..........\...........\avformat.h
................\..........\...........\avio.h
................\..........\...........\version.h
................\..........\libavutil
................\..........\.........\adler32.h
................\..........\.........\aes.h
................\..........\.........\attributes.h
................\..........\.........\audio_fifo.h
................\..........\.........\audioconvert.h
................\..........\.........\avassert.h
................\..........\.........\avconfig.h
................\..........\.........\avstring.h
................\..........\.........\avutil.h
................\..........\.........\base64.h
................\..........\.........\blowfish.h
................\..........\.........\bprint.h
................\..........\.........\bswap.h
................\..........\.........\channel_layout.h
................\..........\.........\common.h
................\..........\.........\cpu.h
................\..........\.........\crc.h
................\..........\.........\dict.h
................\..........\.........\error.h
................\..........\.........\eval.h
................\..........\.........\fifo.h
........

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