Support DSD native

Hi,

there is no work on native DSD support?

It seems that someone did, successfully...

[root@homepc tmp]# gst-typefind-1.0 /tmp/2L-45_stereo_01_DSF_2822k_1b.dsf /tmp/2L-45_stereo_01_DSF_2822k_1b.dsf - audio/x-dsf

[root@homepc tmp]# gst-inspect-1.0 | grep dsd
pcm2dsd128:  pcm2dsd128: PCM to DSD Converter
pcm2dsd:  pcm2dsd: PCM to DSD Converter
audiopcm2dsdbin:  audiopcm2dsdbin: AudioPCM2DSDBin
pcm2dsd64:  pcm2dsd64: PCM to DSD Converter
pcm2dsd256:  pcm2dsd256: PCM to DSD Converter
audiopcm2dsd:  audiopcm2dsd: AudioPCM2DSD
libav:  avdec_dsd_msbf_planar: libav DSD (Direct Stream Digital), most significant bit first, planar decoder
libav:  avdec_dsd_lsbf_planar: libav DSD (Direct Stream Digital), least significant bit first, planar decoder
libav:  avdec_dsd_msbf: libav DSD (Direct Stream Digital), most significant bit first decoder
libav:  avdec_dsd_lsbf: libav DSD (Direct Stream Digital), least significant bit first decoder