// Initialize initializes internal data structures and
// prepares underlying host APIs for use. With the exception
// of Version(), VersionText(), and ErrorText(), this function
// MUST be called before using any other PortAudio API functions.
//
// If Initialize() is called multiple times, each successful call
// must be matched with a corresponding call to Terminate(). Pairs of
// calls to Initialize()/Terminate() may overlap, and are not required to be fully nested.
//
// Note that if Initialize() returns an error code, Terminate() should NOT be called.
func Initialize() error {
paErr := C.Pa_Initialize()
if paErr != C.paNoError {
return newError(paErr)
}
initialized++
return nil
}
func setupAudioOutput(rate int, nChannels int, decoder *Decoder) unsafe.Pointer {
if err := C.Pa_Initialize(); err != C.paNoError {
fatalPAError(err)
}
env = &paEnv{
decoder: decoder,
}
stream := C.pa_open_stream(C.int(nChannels), C.int(rate), unsafe.Pointer(env))
if stream == nil {
log.Fatal("pa open stream")
}
env.stream = stream
return stream
}
/*
Opens the default input and/or output devices.
audioProcessor must have a method
ProcessAudio(in, out [][]SampleType)
or
ProcessAudio(in, out []SampleType)
where SampleType is float32, int32, Int24, int16, int8, or uint8.
In the former case, channels are non-interleaved:
len(in) == numInputChannels, len(out) == numOutputChannels,
and len(in[i]) == len(out[j]) == framesPerBuffer.
In the latter case, channels are interleaved:
len(in) == numInputChannels * framesPerBuffer and len(out) == numOutputChannels * framesPerBuffer.
*/
func OpenDefaultStream(numInputChannels, numOutputChannels int,
sampleRate float64, framesPerBuffer int,
audioProcessor interface{}) (*Stream, error) {
paErr := C.Pa_Initialize()
if paErr != C.paNoError {
return nil, newError(paErr)
}
s := &Stream{}
fmt, err := s.init(audioProcessor, numInputChannels, numOutputChannels)
if err != nil {
return nil, err
}
paErr = C.Pa_OpenDefaultStream(&s.paStream, C.int(numInputChannels), C.int(numOutputChannels), fmt, C.double(sampleRate), C.ulong(framesPerBuffer), C.getPaStreamCallback(), unsafe.Pointer(s))
if paErr != C.paNoError {
return nil, newError(paErr)
}
return s, nil
}
func Initialize() {
err := C.Pa_Initialize()
if err != C.paNoError {
panic(C.Pa_GetErrorText(err))
}
}
// Initialize function as declared in portaudio/portaudio.h:132
func Initialize() Error {
__ret := C.Pa_Initialize()
__v := (Error)(__ret)
return __v
}