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platform: Conditional impl_platform_host based on feature flags
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@ishitatsuyuki
ishitatsuyuki committed Mar 18, 2022
1 parent 9748543 commit 9b67d2e
Showing 1 changed file with 42 additions and 12 deletions.
54 changes: 42 additions & 12 deletions src/platform/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -31,10 +31,11 @@ pub use self::platform_impl::*;
// SupportedOutputConfigs and all their necessary trait implementations.
// ```
macro_rules! impl_platform_host {
($($HostVariant:ident $host_mod:ident $host_name:literal),*) => {
($($(#[cfg($feat: meta)])? $HostVariant:ident $host_mod:ident $host_name:literal),*) => {
/// All hosts supported by CPAL on this platform.
pub const ALL_HOSTS: &'static [HostId] = &[
$(
$(#[cfg($feat)])?
HostId::$HostVariant,
)*
];
Expand Down Expand Up @@ -79,42 +80,49 @@ macro_rules! impl_platform_host {
#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq)]
pub enum HostId {
$(
$(#[cfg($feat)])?
$HostVariant,
)*
}

enum DeviceInner {
$(
$(#[cfg($feat)])?
$HostVariant(crate::host::$host_mod::Device),
)*
}

enum DevicesInner {
$(
$(#[cfg($feat)])?
$HostVariant(crate::host::$host_mod::Devices),
)*
}

enum HostInner {
$(
$(#[cfg($feat)])?
$HostVariant(crate::host::$host_mod::Host),
)*
}

enum StreamInner {
$(
$(#[cfg($feat)])?
$HostVariant(crate::host::$host_mod::Stream),
)*
}

enum SupportedInputConfigsInner {
$(
$(#[cfg($feat)])?
$HostVariant(crate::host::$host_mod::SupportedInputConfigs),
)*
}

enum SupportedOutputConfigsInner {
$(
$(#[cfg($feat)])?
$HostVariant(crate::host::$host_mod::SupportedOutputConfigs),
)*
}
Expand All @@ -123,6 +131,7 @@ macro_rules! impl_platform_host {
pub fn name(&self) -> &'static str {
match self {
$(
$(#[cfg($feat)])?
HostId::$HostVariant => $host_name,
)*
}
Expand All @@ -134,6 +143,7 @@ macro_rules! impl_platform_host {
pub fn id(&self) -> HostId {
match self.0 {
$(
$(#[cfg($feat)])?
HostInner::$HostVariant(_) => HostId::$HostVariant,
)*
}
Expand All @@ -146,6 +156,7 @@ macro_rules! impl_platform_host {
fn next(&mut self) -> Option<Self::Item> {
match self.0 {
$(
$(#[cfg($feat)])?
DevicesInner::$HostVariant(ref mut d) => {
d.next().map(DeviceInner::$HostVariant).map(Device::from)
}
Expand All @@ -156,6 +167,7 @@ macro_rules! impl_platform_host {
fn size_hint(&self) -> (usize, Option<usize>) {
match self.0 {
$(
$(#[cfg($feat)])?
DevicesInner::$HostVariant(ref d) => d.size_hint(),
)*
}
Expand All @@ -168,6 +180,7 @@ macro_rules! impl_platform_host {
fn next(&mut self) -> Option<Self::Item> {
match self.0 {
$(
$(#[cfg($feat)])?
SupportedInputConfigsInner::$HostVariant(ref mut s) => s.next(),
)*
}
Expand All @@ -176,6 +189,7 @@ macro_rules! impl_platform_host {
fn size_hint(&self) -> (usize, Option<usize>) {
match self.0 {
$(
$(#[cfg($feat)])?
SupportedInputConfigsInner::$HostVariant(ref d) => d.size_hint(),
)*
}
Expand All @@ -188,6 +202,7 @@ macro_rules! impl_platform_host {
fn next(&mut self) -> Option<Self::Item> {
match self.0 {
$(
$(#[cfg($feat)])?
SupportedOutputConfigsInner::$HostVariant(ref mut s) => s.next(),
)*
}
Expand All @@ -196,6 +211,7 @@ macro_rules! impl_platform_host {
fn size_hint(&self) -> (usize, Option<usize>) {
match self.0 {
$(
$(#[cfg($feat)])?
SupportedOutputConfigsInner::$HostVariant(ref d) => d.size_hint(),
)*
}
Expand All @@ -210,6 +226,7 @@ macro_rules! impl_platform_host {
fn name(&self) -> Result<String, crate::DeviceNameError> {
match self.0 {
$(
$(#[cfg($feat)])?
DeviceInner::$HostVariant(ref d) => d.name(),
)*
}
Expand All @@ -218,6 +235,7 @@ macro_rules! impl_platform_host {
fn supported_input_configs(&self) -> Result<Self::SupportedInputConfigs, crate::SupportedStreamConfigsError> {
match self.0 {
$(
$(#[cfg($feat)])?
DeviceInner::$HostVariant(ref d) => {
d.supported_input_configs()
.map(SupportedInputConfigsInner::$HostVariant)
Expand All @@ -230,6 +248,7 @@ macro_rules! impl_platform_host {
fn supported_output_configs(&self) -> Result<Self::SupportedOutputConfigs, crate::SupportedStreamConfigsError> {
match self.0 {
$(
$(#[cfg($feat)])?
DeviceInner::$HostVariant(ref d) => {
d.supported_output_configs()
.map(SupportedOutputConfigsInner::$HostVariant)
Expand All @@ -242,6 +261,7 @@ macro_rules! impl_platform_host {
fn default_input_config(&self) -> Result<crate::SupportedStreamConfig, crate::DefaultStreamConfigError> {
match self.0 {
$(
$(#[cfg($feat)])?
DeviceInner::$HostVariant(ref d) => d.default_input_config(),
)*
}
Expand All @@ -250,6 +270,7 @@ macro_rules! impl_platform_host {
fn default_output_config(&self) -> Result<crate::SupportedStreamConfig, crate::DefaultStreamConfigError> {
match self.0 {
$(
$(#[cfg($feat)])?
DeviceInner::$HostVariant(ref d) => d.default_output_config(),
)*
}
Expand All @@ -268,6 +289,7 @@ macro_rules! impl_platform_host {
{
match self.0 {
$(
$(#[cfg($feat)])?
DeviceInner::$HostVariant(ref d) => d
.build_input_stream_raw(
config,
Expand All @@ -294,6 +316,7 @@ macro_rules! impl_platform_host {
{
match self.0 {
$(
$(#[cfg($feat)])?
DeviceInner::$HostVariant(ref d) => d
.build_output_stream_raw(
config,
Expand All @@ -313,12 +336,17 @@ macro_rules! impl_platform_host {
type Device = Device;

fn is_available() -> bool {
$( crate::host::$host_mod::Host::is_available() ||)* false
$(
$(#[cfg($feat)])?
if crate::host::$host_mod::Host::is_available() { return true; }
)*
false
}

fn devices(&self) -> Result<Self::Devices, crate::DevicesError> {
match self.0 {
$(
$(#[cfg($feat)])?
HostInner::$HostVariant(ref h) => {
h.devices().map(DevicesInner::$HostVariant).map(Devices::from)
}
Expand All @@ -329,6 +357,7 @@ macro_rules! impl_platform_host {
fn default_input_device(&self) -> Option<Self::Device> {
match self.0 {
$(
$(#[cfg($feat)])?
HostInner::$HostVariant(ref h) => {
h.default_input_device().map(DeviceInner::$HostVariant).map(Device::from)
}
Expand All @@ -339,6 +368,7 @@ macro_rules! impl_platform_host {
fn default_output_device(&self) -> Option<Self::Device> {
match self.0 {
$(
$(#[cfg($feat)])?
HostInner::$HostVariant(ref h) => {
h.default_output_device().map(DeviceInner::$HostVariant).map(Device::from)
}
Expand All @@ -351,6 +381,7 @@ macro_rules! impl_platform_host {
fn play(&self) -> Result<(), crate::PlayStreamError> {
match self.0 {
$(
$(#[cfg($feat)])?
StreamInner::$HostVariant(ref s) => {
s.play()
}
Expand All @@ -361,6 +392,7 @@ macro_rules! impl_platform_host {
fn pause(&self) -> Result<(), crate::PauseStreamError> {
match self.0 {
$(
$(#[cfg($feat)])?
StreamInner::$HostVariant(ref s) => {
s.pause()
}
Expand Down Expand Up @@ -394,24 +426,28 @@ macro_rules! impl_platform_host {
}

$(
$(#[cfg($feat)])?
impl From<crate::host::$host_mod::Device> for Device {
fn from(h: crate::host::$host_mod::Device) -> Self {
DeviceInner::$HostVariant(h).into()
}
}

$(#[cfg($feat)])?
impl From<crate::host::$host_mod::Devices> for Devices {
fn from(h: crate::host::$host_mod::Devices) -> Self {
DevicesInner::$HostVariant(h).into()
}
}

$(#[cfg($feat)])?
impl From<crate::host::$host_mod::Host> for Host {
fn from(h: crate::host::$host_mod::Host) -> Self {
HostInner::$HostVariant(h).into()
}
}

$(#[cfg($feat)])?
impl From<crate::host::$host_mod::Stream> for Stream {
fn from(h: crate::host::$host_mod::Stream) -> Self {
StreamInner::$HostVariant(h).into()
Expand All @@ -423,6 +459,7 @@ macro_rules! impl_platform_host {
pub fn available_hosts() -> Vec<HostId> {
let mut host_ids = vec![];
$(
$(#[cfg($feat)])?
if <crate::host::$host_mod::Host as crate::traits::HostTrait>::is_available() {
host_ids.push(HostId::$HostVariant);
}
Expand All @@ -434,6 +471,7 @@ macro_rules! impl_platform_host {
pub fn host_from_id(id: HostId) -> Result<Host, crate::HostUnavailable> {
match id {
$(
$(#[cfg($feat)])?
HostId::$HostVariant => {
crate::host::$host_mod::Host::new()
.map(HostInner::$HostVariant)
Expand All @@ -460,11 +498,7 @@ mod platform_impl {
SupportedOutputConfigs as JackSupportedOutputConfigs,
};

#[cfg(feature = "jack")]
impl_platform_host!(Jack jack "JACK", Alsa alsa "ALSA");

#[cfg(not(feature = "jack"))]
impl_platform_host!(Alsa alsa "ALSA");
impl_platform_host!(#[cfg(feature = "jack")] Jack jack "JACK", Alsa alsa "ALSA");

/// The default host for the current compilation target platform.
pub fn default_host() -> Host {
Expand Down Expand Up @@ -542,11 +576,7 @@ mod platform_impl {
SupportedOutputConfigs as WasapiSupportedOutputConfigs,
};

#[cfg(feature = "asio")]
impl_platform_host!(Asio asio "ASIO", Wasapi wasapi "WASAPI");

#[cfg(not(feature = "asio"))]
impl_platform_host!(Wasapi wasapi "WASAPI");
impl_platform_host!(#[cfg(feature = "asio")] Asio asio "ASIO", Wasapi wasapi "WASAPI");

/// The default host for the current compilation target platform.
pub fn default_host() -> Host {
Expand Down

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