| Lift freeq's AV media plane out of sleek 90f8b89 nandi 19d ago | 1 | use super::{Device, OSStatus}; |
| 2 | use crate::{BackendSpecificError, DevicesError}; |
| 3 | use objc2_core_audio::{ |
| 4 | kAudioHardwareNoError, kAudioHardwarePropertyDefaultInputDevice, |
| 5 | kAudioHardwarePropertyDefaultOutputDevice, kAudioHardwarePropertyDevices, |
| 6 | kAudioObjectPropertyElementMaster, kAudioObjectPropertyScopeGlobal, kAudioObjectSystemObject, |
| 7 | AudioDeviceID, AudioObjectGetPropertyData, AudioObjectGetPropertyDataSize, AudioObjectID, |
| 8 | AudioObjectPropertyAddress, |
| 9 | }; |
| 10 | use std::mem; |
| 11 | use std::ptr::{null, NonNull}; |
| 12 | use std::vec::IntoIter as VecIntoIter; |
| 13 | |
| 14 | unsafe fn audio_devices() -> Result<Vec<AudioDeviceID>, OSStatus> { |
| 15 | let property_address = AudioObjectPropertyAddress { |
| 16 | mSelector: kAudioHardwarePropertyDevices, |
| 17 | mScope: kAudioObjectPropertyScopeGlobal, |
| 18 | mElement: kAudioObjectPropertyElementMaster, |
| 19 | }; |
| 20 | |
| 21 | macro_rules! try_status_or_return { |
| 22 | ($status:expr) => { |
| 23 | if $status != kAudioHardwareNoError as i32 { |
| 24 | return Err($status); |
| 25 | } |
| 26 | }; |
| 27 | } |
| 28 | |
| 29 | let mut data_size = 0u32; |
| 30 | let status = AudioObjectGetPropertyDataSize( |
| 31 | kAudioObjectSystemObject as AudioObjectID, |
| 32 | NonNull::from(&property_address), |
| 33 | 0, |
| 34 | null(), |
| 35 | NonNull::from(&mut data_size), |
| 36 | ); |
| 37 | try_status_or_return!(status); |
| 38 | |
| 39 | let device_count = data_size / mem::size_of::<AudioDeviceID>() as u32; |
| 40 | let mut audio_devices = vec![]; |
| 41 | audio_devices.reserve_exact(device_count as usize); |
| 42 | |
| 43 | let status = AudioObjectGetPropertyData( |
| 44 | kAudioObjectSystemObject as AudioObjectID, |
| 45 | NonNull::from(&property_address), |
| 46 | 0, |
| 47 | null(), |
| 48 | NonNull::from(&mut data_size), |
| 49 | NonNull::new(audio_devices.as_mut_ptr()).unwrap().cast(), |
| 50 | ); |
| 51 | try_status_or_return!(status); |
| 52 | |
| 53 | audio_devices.set_len(device_count as usize); |
| 54 | |
| 55 | Ok(audio_devices) |
| 56 | } |
| 57 | |
| 58 | pub struct Devices(VecIntoIter<AudioDeviceID>); |
| 59 | |
| 60 | impl Devices { |
| 61 | pub fn new() -> Result<Self, DevicesError> { |
| 62 | let devices = unsafe { |
| 63 | match audio_devices() { |
| 64 | Ok(devices) => devices, |
| 65 | Err(os_status) => { |
| 66 | let description = format!("{os_status}"); |
| 67 | let err = BackendSpecificError { description }; |
| 68 | return Err(err.into()); |
| 69 | } |
| 70 | } |
| 71 | }; |
| 72 | Ok(Devices(devices.into_iter())) |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | impl Iterator for Devices { |
| 77 | type Item = Device; |
| 78 | |
| 79 | fn next(&mut self) -> Option<Device> { |
| 80 | self.0.next().map(|id| Device { |
| 81 | audio_device_id: id, |
| 82 | }) |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | pub fn default_input_device() -> Option<Device> { |
| 87 | let property_address = AudioObjectPropertyAddress { |
| 88 | mSelector: kAudioHardwarePropertyDefaultInputDevice, |
| 89 | mScope: kAudioObjectPropertyScopeGlobal, |
| 90 | mElement: kAudioObjectPropertyElementMaster, |
| 91 | }; |
| 92 | |
| 93 | let mut audio_device_id: AudioDeviceID = 0; |
| 94 | let data_size = mem::size_of::<AudioDeviceID>() as u32; |
| 95 | let status = unsafe { |
| 96 | AudioObjectGetPropertyData( |
| 97 | kAudioObjectSystemObject as AudioObjectID, |
| 98 | NonNull::from(&property_address), |
| 99 | 0, |
| 100 | null(), |
| 101 | NonNull::from(&data_size), |
| 102 | NonNull::from(&mut audio_device_id).cast(), |
| 103 | ) |
| 104 | }; |
| 105 | if status != kAudioHardwareNoError { |
| 106 | return None; |
| 107 | } |
| 108 | |
| 109 | let device = Device { audio_device_id }; |
| 110 | Some(device) |
| 111 | } |
| 112 | |
| 113 | pub fn default_output_device() -> Option<Device> { |
| 114 | let property_address = AudioObjectPropertyAddress { |
| 115 | mSelector: kAudioHardwarePropertyDefaultOutputDevice, |
| 116 | mScope: kAudioObjectPropertyScopeGlobal, |
| 117 | mElement: kAudioObjectPropertyElementMaster, |
| 118 | }; |
| 119 | |
| 120 | let mut audio_device_id: AudioDeviceID = 0; |
| 121 | let data_size = mem::size_of::<AudioDeviceID>() as u32; |
| 122 | let status = unsafe { |
| 123 | AudioObjectGetPropertyData( |
| 124 | kAudioObjectSystemObject as AudioObjectID, |
| 125 | NonNull::from(&property_address), |
| 126 | 0, |
| 127 | null(), |
| 128 | NonNull::from(&data_size), |
| 129 | NonNull::from(&mut audio_device_id).cast(), |
| 130 | ) |
| 131 | }; |
| 132 | if status != kAudioHardwareNoError { |
| 133 | return None; |
| 134 | } |
| 135 | |
| 136 | let device = Device { audio_device_id }; |
| 137 | Some(device) |
| 138 | } |
| 139 | |
| 140 | pub use crate::iter::{SupportedInputConfigs, SupportedOutputConfigs}; |