func (s *Sound) mix(stream *C.Uint8, sz C.int) {
vol := C.int(C.SDL_MIX_MAXVOLUME)
left := uintptr(sz)
dst := uintptr(unsafe.Pointer(stream))
for left > 0 {
data := uintptr(s.data) + uintptr(s.pos)
n := uintptr(left)
if s.len-s.pos < n {
n = s.len - s.pos
}
C.SDL_MixAudio((*C.Uint8)(unsafe.Pointer(dst)), (*C.Uint8)(unsafe.Pointer(data)), C.Uint32(n), vol)
left -= n
s.pos += n
dst += uintptr(n)
if !s.repeat {
break
} else if s.pos >= s.len {
s.pos = 0
}
}
}
func MixAudio(dst, src *uint8, len_ uint32, volume int) {
_dst := (*C.Uint8)(unsafe.Pointer(dst))
_src := (*C.Uint8)(unsafe.Pointer(src))
_len := (C.Uint32)(len_)
_volume := (C.int)(volume)
C.SDL_MixAudio(_dst, _src, _len, _volume)
}
func MixAudio(dst, src []byte, vol int) error {
if len(dst) != len(src) {
return errors.New("len(dst) != len(src)")
}
C.SDL_MixAudio(
(*C.Uint8)(unsafe.Pointer(&dst[0])),
(*C.Uint8)(unsafe.Pointer(&src[0])),
C.Uint32(len(dst)),
C.int(vol),
)
return nil
}
// MixAudio (https://wiki.libsdl.org/SDL_MixAudio)
func MixAudio(dst, src *uint8, len_ uint32, volume int) {
_dst := (*C.Uint8)(unsafe.Pointer(dst))
_src := (*C.Uint8)(unsafe.Pointer(src))
C.SDL_MixAudio(_dst, _src, C.Uint32(len_), C.int(volume))
}
func MixAudio(dst, src []byte, volume int) {
C.SDL_MixAudio((*C.Uint8)(unsafe.Pointer(&dst[0])), (*C.Uint8)(unsafe.Pointer(&src[0])), C.Uint32(len(dst)), C.int(volume))
}
func MixAudio(dst, src *C.Uint8, length C.Uint32, volume C.int) {
C.SDL_MixAudio(dst, src, length, volume)
}