For someone looking for similar problem solution (may be i found not best
solution, please correct me if i wrong):
Looks like this header is too complex for c2nim (or i am not familyar with
c/nim/c2nim) So, i find another way for it. I write small header for
basslib.so, convert it 2 nim with c2nim, and look at generated code and write
nim wrapper manualy
So, wraper looks like:
{.deadCodeElim: on.}
## # Dynamically link to the correct library for our system:
when defined(windows):
const
basslib* = "libbass.dll"
elif defined(macosx):
const
basslib* = "libbass.dylib"
else:
const
basslib* = "libbass.so"
template HIWORD*(a: expr): expr =
(WORD)((a) shr 16)
type
DWORD* = uint32
WORD* = uint16
QWORD* = uint64
BOOL* = cint
HSTREAM* = DWORD
BASS_INFO* = object
flags*: DWORD ## # device capabilities (DSCAPS_xxx flags)
hwsize*: DWORD ## # size of total device hardware memory
hwfree*: DWORD ## # size of free device hardware memory
freesam*: DWORD ## # number of free sample slots in the
hardware
free3d*: DWORD ## # number of free 3D sample slots in the
hardware
minrate*: DWORD ## # min sample rate supported by the
hardware
maxrate*: DWORD ## # max sample rate supported by the
hardware
eax*: BOOL ## # device supports EAX? (always FALSE if
BASS_DEVICE_3D was not used)
minbuf*: DWORD ## # recommended minimum buffer length in ms
(requires BASS_DEVICE_LATENCY)
dsver*: DWORD ## # DirectSound version
latency*: DWORD ## # delay (in ms) before start of playback
(requires BASS_DEVICE_LATENCY)
initflags*: DWORD ## # BASS_Init "flags" parameter
speakers*: DWORD ## # number of speakers available
freq*: DWORD ## # current output rate
proc BASS_GetDeviceInfo*(device:DWORD,info:object):BOOL {.importc, dynlib:
basslib}
proc BASS_GetVersion*():DWORD {.importc, dynlib: basslib}
proc BASS_Init*(device:int, freq:DWORD, flags:DWORD, win: pointer; dsguid:
pointer): BOOL {.importc, dynlib: basslib}
proc BASS_StreamCreateFile*(mem: BOOL; file: cstring; offset: QWORD;
length: QWORD; flags: DWORD): HSTREAM {.cdecl,
importc: "BASS_StreamCreateFile", dynlib: basslib.}
proc BASS_ChannelPlay*(handle: DWORD; restart: BOOL): BOOL {.cdecl,
importc: "BASS_ChannelPlay", dynlib: basslib.}
proc BASS_ChannelIsActive*(handle: DWORD): BOOL {.importc, dynlib: basslib}
proc BASS_Free*(): BOOL {.importc, dynlib: basslib}
And usage of library now pretty simple (dummy example playing file):
import bass,os
echo "version:",HIWORD(BASS_GetVersion())
var info:BASS_INFO
discard BASS_GetDeviceInfo(0,info)
echo "freq",info.freq
let init = BASS_Init(-1,44100,0,nil,nil)
echo "init bass:",init
let filename = "/Users/recoilme/Music/01.mp3"
let chan=BASS_StreamCreateFile(0,filename,0,0,0);
echo "channel:",chan
let play = BASS_ChannelPlay(chan,0)
while BASS_ChannelIsActive(chan)>0:
sleep 50
discard BASS_Free
