libavcodec/dxva2.h:40:5: error: unknown type name 'IDirectXVideoDecoder'

gcc 4.9.2 编译 ffmpeg-git-1aeb88b 是出现如下错误

> FFmpeg fails to make with:
>
> CC libavcodec/dxva2.o
> In file included from libavcodec/dxva2_internal.h:26:0,
> from libavcodec/dxva2.c:23:
> libavcodec/dxva2.h:40:5: error: unknown type name 'IDirectXVideoDecoder'
> libavcodec/dxva2.h:45:5: error: unknown type name
> 'DXVA2_ConfigPictureDecode'
> libavcodec/dxva2.h:55:5: error: unknown type name 'LPDIRECT3DSURFACE9'
> In file included from libavcodec/dxva2.c:23:0:
> libavcodec/dxva2_internal.h:36:28: error: unknown type name
> 'DXVA2_DecodeBufferDesc'
> libavcodec/dxva2_internal.h:45:51: error: unknown type name
> 'DXVA2_DecodeBufferDesc'
> libavcodec/dxva2_internal.h:46:51: error: unknown type name
> 'DXVA2_DecodeBufferDesc'
> libavcodec/dxva2.c:46:28: error: unknown type name 'DXVA2_DecodeBufferDesc'
> libavcodec/dxva2.c:83:51: error: unknown type name 'DXVA2_DecodeBufferDesc'
> libavcodec/dxva2.c:84:51: error: unknown type name 'DXVA2_DecodeBufferDesc'
> make: *** [libavcodec/dxva2.o] Error 1

折腾了好久 用 gcc 4.5.2 编译就顺利通过.

解决方法 https://code.csdn.net/bygreen/ffmpeg_ffplay_vc2010/tree/master/include/dxva2api.h
文件拷贝到系统 include\dxva2api.h 目录下