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use num_complex::Complex32;
use crate::Error;
/// Receive samples from a [Device](crate::Device) through one or multiple channels.
pub trait RxStreamer: Send {
/// Get the stream's maximum transmission unit (MTU) in number of elements.
///
/// The MTU specifies the maximum payload transfer in a stream operation.
/// This value can be used as a stream buffer allocation size that can
/// best optimize throughput given the underlying stream implementation.
fn mtu(&self) -> Result<usize, Error>;
/// Activate a stream.
///
/// Call `activate` to enable a stream before using `read()`
fn activate(&mut self) -> Result<(), Error> {
self.activate_at(None)
}
/// Activate a stream.
///
/// Call `activate` to enable a stream before using `read()`
///
/// # Arguments:
/// * `time_ns` -- optional activation time in nanoseconds from the time the function is
/// called.
fn activate_at(&mut self, time_ns: Option<i64>) -> Result<(), Error>;
/// Deactivate a stream.
/// The implementation will control switches or halt data flow.
fn deactivate(&mut self) -> Result<(), Error> {
self.deactivate_at(None)
}
/// Deactivate a stream.
/// The implementation will control switches or halt data flow.
///
/// # Arguments:
/// * `time_ns` -- optional deactivation time in nanoseconds from the time the function is
/// called.
fn deactivate_at(&mut self, time_ns: Option<i64>) -> Result<(), Error>;
/// Read samples from the stream into the provided buffers.
///
/// `buffers` contains one destination slice for each channel of this stream.
///
/// Returns the number of samples read, which may be smaller than the size of the passed arrays.
///
/// # Panics
/// * If `buffers` is not the same length as the `channels` array passed to
/// [`Device::rx_streamer`](crate::Device::rx_streamer) that created the streamer.
fn read(&mut self, buffers: &mut [&mut [Complex32]], timeout_us: i64) -> Result<usize, Error>;
}
#[doc(hidden)]
impl RxStreamer for Box<dyn RxStreamer> {
fn mtu(&self) -> Result<usize, Error> {
self.as_ref().mtu()
}
fn activate_at(&mut self, time_ns: Option<i64>) -> Result<(), Error> {
self.as_mut().activate_at(time_ns)
}
fn deactivate_at(&mut self, time_ns: Option<i64>) -> Result<(), Error> {
self.as_mut().deactivate_at(time_ns)
}
fn read(&mut self, buffers: &mut [&mut [Complex32]], timeout_us: i64) -> Result<usize, Error> {
self.as_mut().read(buffers, timeout_us)
}
}
/// Transmit samples with a [Device](crate::Device) through one or multiple channels.
pub trait TxStreamer: Send {
/// Get the stream's maximum transmission unit (MTU) in number of elements.
///
/// The MTU specifies the maximum payload transfer in a stream operation.
/// This value can be used as a stream buffer allocation size that can
/// best optimize throughput given the underlying stream implementation.
fn mtu(&self) -> Result<usize, Error>;
/// Activate a stream.
///
/// Call `activate` to enable a stream before using `write()`
fn activate(&mut self) -> Result<(), Error> {
self.activate_at(None)
}
/// Activate a stream.
///
/// Call `activate` to enable a stream before using `write()`
///
/// # Arguments:
/// * `time_ns` -- optional activation time in nanoseconds from the time the function is
/// called.
fn activate_at(&mut self, time_ns: Option<i64>) -> Result<(), Error>;
/// Deactivate a stream.
/// The implementation will control switches or halt data flow.
fn deactivate(&mut self) -> Result<(), Error> {
self.deactivate_at(None)
}
/// Deactivate a stream.
/// The implementation will control switches or halt data flow.
///
/// # Arguments:
/// * `time_ns` -- optional deactivation time in nanoseconds from the time the function is
/// called
fn deactivate_at(&mut self, time_ns: Option<i64>) -> Result<(), Error>;
/// Attempt to write samples to the device from the provided buffer.
///
/// The stream must first be [activated](TxStreamer::activate).
///
/// `buffers` contains one source slice for each channel of the stream.
///
/// `at_ns` is an optional nanosecond precision device timestamp relative to the time the
/// function is called at which the device will begin the transmission.
///
/// `end_burst` indicates the end of a burst transmission.
///
/// Returns the number of samples written, which may be smaller than the size of the passed arrays.
///
/// # Panics
/// * If `buffers` are not the same length as the `channels` array passed to [`Device::tx_streamer`](crate::Device::tx_streamer).
/// * If the buffers in `buffers` are not the same length.
fn write(
&mut self,
buffers: &[&[Complex32]],
at_ns: Option<i64>,
end_burst: bool,
timeout_us: i64,
) -> Result<usize, Error>;
/// Write all samples to the device.
///
/// This method repeatedly calls [write](TxStreamer::write) until the entire provided buffer has
/// been written.
///
/// The stream must first be [activated](TxStreamer::activate).
///
/// `buffers` contains one source slice for each channel of the stream.
///
/// `at_ns` is an optional nanosecond precision device timestamp relative to the time the
/// function is called at which the device will begin the transmission.
///
/// `end_burst` indicates the end of a burst transmission.
///
/// # Panics
/// * If `buffers` are not the same length as the `channels` array passed to [`Device::tx_streamer`](crate::Device::tx_streamer).
/// * If the buffers in `buffers` are not the same length.
fn write_all(
&mut self,
buffers: &[&[Complex32]],
at_ns: Option<i64>,
end_burst: bool,
timeout_us: i64,
) -> Result<(), Error>;
}
#[doc(hidden)]
impl TxStreamer for Box<dyn TxStreamer> {
fn mtu(&self) -> Result<usize, Error> {
self.as_ref().mtu()
}
fn activate_at(&mut self, time_ns: Option<i64>) -> Result<(), Error> {
self.as_mut().activate_at(time_ns)
}
fn deactivate_at(&mut self, time_ns: Option<i64>) -> Result<(), Error> {
self.as_mut().deactivate_at(time_ns)
}
fn write(
&mut self,
buffers: &[&[Complex32]],
at_ns: Option<i64>,
end_burst: bool,
timeout_us: i64,
) -> Result<usize, Error> {
self.as_mut().write(buffers, at_ns, end_burst, timeout_us)
}
fn write_all(
&mut self,
buffers: &[&[Complex32]],
at_ns: Option<i64>,
end_burst: bool,
timeout_us: i64,
) -> Result<(), Error> {
self.as_mut()
.write_all(buffers, at_ns, end_burst, timeout_us)
}
}