support for W64

[surlypants]

file test.w64
test.w64: Sony Wave64 RIFF data, WAVE 64 audio, stereo 48000 Hz

du -sh test.w64
2.1G	test.w64

ssrc_hp_mac --twopass --rate 44100 --bits 16 --dither 1 --pdf 1 1 test.w64 test_44.w64
Shibatch sampling rate converter version 1.33(double precision)

unknown error 1

[surlypants]

fwiw - how sox sees it:

sox test.w64 -G -V3 -b 16 -r 44.1k  test.wav
sox:      SoX v

Input File     : 'test.w64'
Channels       : 2
Sample Rate    : 48000
Precision      : 24-bit
Duration       : 02:09:25.96 = 372766080 samples ~ 582447 CDDA sectors
File Size      : 2.24G
Bit Rate       : 2.30M
Sample Encoding: 24-bit Signed Integer PCM
Endian Type    : little
Reverse Nibbles: no
Reverse Bits   : no


Output File    : 'test.wav'
Channels       : 2
Sample Rate    : 44100
Precision      : 16-bit
Duration       : 02:09:25.96 = 342478836 samples = 582447 CDDA sectors
Sample Encoding: 16-bit Signed Integer PCM
Endian Type    : little
Reverse Nibbles: no
Reverse Bits   : no
Comment        : 'Processed by SoX'

sox INFO sox: effects chain: input        48000Hz  2 channels
sox INFO sox: effects chain: gain         48000Hz  2 channels
sox INFO sox: effects chain: rate         44100Hz  2 channels
sox INFO sox: effects chain: gain         44100Hz  2 channels
sox INFO sox: effects chain: dither       44100Hz  2 channels
sox INFO sox: effects chain: output       44100Hz  2 channels
sox INFO gain: 0.053dB not reclaimed