rtaudio/stream
src/rtaudio/stream.tur
defn
stream-open
(stream-open [a : Audio out-device : int out-chans : int in-device : int in-chans : int format : cstr sample-rate : int buf-frames : int callback : (c-fn [ptr<void> ptr<void> int float int ptr<void>])
configure and open an audio stream.
Parameters
| a | audio handle (ok-val from audio-new) | |
| out-device | output device index (-1 to disable output) | |
| out-chans | number of output channels (0 to disable output) | |
| in-device | input device index (-1 to disable input) | |
| in-chans | number of input channels (0 to disable input) | |
| format | sample format keyword: ":int16", ":int32", ":float32", ":float64" | |
| sample-rate | desired sample rate in Hz (e.g. 44100, 48000) | |
| buf-frames | buffer size in frames (e.g. 256, 512) | |
| callback | captureless C-ABI audio callback of shape | |
| `int (*)(void *out, void *in, unsigned int nFrames, | ||
| double stream_time, rtaudio_stream_status_t status, | ||
| void *userdata)`, spelled | ||
| `(c-fn [ptr<void> ptr<void> int float int ptr<void>] int)` |
Returns
(Result int int) -- ok carries 0; err carries 0 on failure.
Example
(let [r (stream-open a 0 2 -1 0 ":float32" 44100 512 my-cb)]
(if (ok? r) (stream-start a) (println "stream-open failed")))
Since: RA0
defn
stream-start
(stream-start [a : Audio] :)
begin audio processing on an open stream.
Parameters
| a | audio handle (ok-val from audio-new) |
Returns
(Result int int) -- ok carries 0; err carries 0 on failure.
Example
(stream-start a)
Since: RA0
defn
stream-stop
(stream-stop [a : Audio] :)
stop audio processing without closing the stream.
Parameters
| a | audio handle (ok-val from audio-new) |
Returns
void
Example
(stream-stop a)
Since: RA0
defn
stream-close
(stream-close [a : Audio] :)
close the audio stream and release its resources.
Parameters
| a | audio handle (ok-val from audio-new) |
Returns
void
Example
(stream-close a)
Since: RA0
defn
stream-latency
(stream-latency [a : Audio] :)
return the stream latency in frames.
Parameters
| a | audio handle (ok-val from audio-new) |
Returns
Latency in frames as :int.
Example
(println (stream-latency a))
Since: RA0
defn
stream-sample-rate
(stream-sample-rate [a : Audio] :)
return the stream sample rate in Hz.
Parameters
| a | audio handle (ok-val from audio-new) |
Returns
Sample rate as :int (e.g. 44100).
Example
(println (stream-sample-rate a))
Since: RA0