rahmenlose Ansicht.rs DruckansichtUnknown {[0] [0] [0]} [Methode: Schwerpunktbildung, einfache Gewichte, sechs Dimensionen]
// Copyright © 2018 Mozilla Foundation
//
// This program is made available under an ISC-style license. See the
// accompanying file LICENSE for details.
#![allow(unused_assignments)]
#![allow(unused_must_use)]
extern crate coreaudio_sys_utils;
extern crate libc;
extern crate ringbuf;
mod aggregate_device;
mod auto_release;
mod buffer_manager;
mod device_property;
mod mixer;
mod resampler;
mod utils;
use self::aggregate_device::*;
use self::auto_release::*;
use self::buffer_manager::*;
use self::coreaudio_sys_utils::aggregate_device::*;
use self::coreaudio_sys_utils::audio_device_extensions::*;
use self::coreaudio_sys_utils::audio_object::*;
use self::coreaudio_sys_utils::audio_unit::*;
use self::coreaudio_sys_utils::cf_mutable_dict::*;
use self::coreaudio_sys_utils::dispatch::*;
use self::coreaudio_sys_utils::string::*;
use self::coreaudio_sys_utils::sys::*;
use self::device_property::*;
use self::mixer::*;
use self::resampler::*;
use self::utils::*;
use backend::ringbuf::RingBuffer;
#[cfg(feature = "audio-dump")]
use cubeb_backend::ffi::cubeb_audio_dump_stream_t;
use cubeb_backend::{
ffi, ChannelLayout, Context, ContextOps, DeviceCollectionRef, DeviceId, DeviceRef, DeviceType,
Error, InputProcessingParams, Ops, Result, SampleFormat, State, Stream, StreamOps,
StreamParams, StreamParamsRef, StreamPrefs,
};
use mach::mach_time::{mach_absolute_time, mach_timebase_info};
use std::cmp;
use std::ffi::{CStr, CString};
use std::fmt;
use std::mem;
use std::os::raw::{c_uint, c_void};
use std::ptr;
use std::slice;
use std::str::FromStr;
use std::sync::atomic::{AtomicBool, AtomicU32, AtomicUsize, Ordering};
use std::sync::{Arc, Condvar, Mutex, MutexGuard, Weak};
use std::time::{Duration, Instant};
const NO_ERR: OSStatus = 0;
const AU_OUT_BUS: AudioUnitElement = 0;
const AU_IN_BUS: AudioUnitElement = 1;
const PRIVATE_AGGREGATE_DEVICE_NAME: &str = "CubebAggregateDevice";
const VOICEPROCESSING_AGGREGATE_DEVICE_NAME: &str = "VPAUAggregateAudioDevice";
const APPLE_STUDIO_DISPLAY_USB_ID: &str = "05AC:1114";
// Testing empirically, some headsets report a minimal latency that is very low,
// but this does not work in practice. Lie and say the minimum is 128 frames.
const SAFE_MIN_LATENCY_FRAMES: u32 = 128;
const SAFE_MAX_LATENCY_FRAMES: u32 = 512;
const VPIO_IDLE_TIMEOUT: Duration = Duration::from_secs(10);
const MACOS_KERNEL_MAJOR_VERSION_MONTEREY: u32 = 21;
#[derive(Debug, PartialEq)]
enum ParseMacOSKernelVersionError {
SysCtl,
Malformed,
Parsing,
}
fn macos_kernel_major_version() -> std::result::Result<u32, ParseMacOSKernelVersionError> {
let ver = whatsys::kernel_version();
if ver.is_none() {
return Err(ParseMacOSKernelVersionError::SysCtl);
}
let ver = ver.unwrap();
let major = ver.split('.').next();
if major.is_none() {
return Err(ParseMacOSKernelVersionError::Malformed);
}
let parsed_major = u32::from_str(major.unwrap());
if parsed_major.is_err() {
return Err(ParseMacOSKernelVersionError::Parsing);
}
Ok(parsed_major.unwrap())
}
bitflags! {
#[allow(non_camel_case_types)]
#[derive(Clone, Debug, PartialEq, Copy)]
struct device_flags: u32 {
const DEV_UNKNOWN = 0b0000_0000; // Unknown
const DEV_INPUT = 0b0000_0001; // Record device like mic
const DEV_OUTPUT = 0b0000_0010; // Playback device like speakers
const DEV_SELECTED_DEFAULT = 0b0000_0100; // User selected to use the system default device
}
}
#[cfg(feature = "audio-dump")]
fn dump_audio(stream: cubeb_audio_dump_stream_t, audio_samples: *mut c_void, count: u32) {
unsafe {
let rv = ffi::cubeb_audio_dump_write(stream, audio_samples, count);
if rv != 0 {
cubeb_alog!("Error dumping audio data");
}
}
}
fn make_sized_audio_channel_layout(sz: usize) -> AutoRelease<AudioChannelLayout> {
assert!(sz >= mem::size_of::<AudioChannelLayout>());
assert_eq!(
(sz - mem::size_of::<AudioChannelLayout>()) % mem::size_of::<AudioChannelDescription>(),
0
);
let acl = unsafe { libc::calloc(1, sz) } as *mut AudioChannelLayout;
unsafe extern "C" fn free_acl(acl: *mut AudioChannelLayout) {
libc::free(acl as *mut libc::c_void);
}
AutoRelease::new(acl, free_acl)
}
#[allow(non_camel_case_types)]
#[derive(Clone, Debug)]
struct device_info {
id: AudioDeviceID,
flags: device_flags,
}
impl Default for device_info {
fn default() -> Self {
Self {
id: kAudioObjectUnknown,
flags: device_flags::DEV_UNKNOWN,
}
}
}
#[allow(non_camel_case_types)]
#[derive(Debug)]
struct device_property_listener {
device: AudioDeviceID,
property: AudioObjectPropertyAddress,
listener: audio_object_property_listener_proc,
}
impl device_property_listener {
fn new(
device: AudioDeviceID,
property: AudioObjectPropertyAddress,
listener: audio_object_property_listener_proc,
) -> Self {
Self {
device,
property,
listener,
}
}
}
#[derive(Debug, PartialEq)]
struct CAChannelLabel(AudioChannelLabel);
impl From<CAChannelLabel> for mixer::Channel {
fn from(label: CAChannelLabel) -> mixer::Channel {
use self::coreaudio_sys_utils::sys;
match label.0 {
sys::kAudioChannelLabel_Left => mixer::Channel::FrontLeft,
sys::kAudioChannelLabel_Right => mixer::Channel::FrontRight,
sys::kAudioChannelLabel_Center | sys::kAudioChannelLabel_Mono => {
mixer::Channel::FrontCenter
}
sys::kAudioChannelLabel_LFEScreen => mixer::Channel::LowFrequency,
sys::kAudioChannelLabel_LeftSurround => mixer::Channel::BackLeft,
sys::kAudioChannelLabel_RightSurround => mixer::Channel::BackRight,
sys::kAudioChannelLabel_LeftCenter => mixer::Channel::FrontLeftOfCenter,
sys::kAudioChannelLabel_RightCenter => mixer::Channel::FrontRightOfCenter,
sys::kAudioChannelLabel_CenterSurround => mixer::Channel::BackCenter,
sys::kAudioChannelLabel_LeftSurroundDirect => mixer::Channel::SideLeft,
sys::kAudioChannelLabel_RightSurroundDirect => mixer::Channel::SideRight,
sys::kAudioChannelLabel_TopCenterSurround => mixer::Channel::TopCenter,
sys::kAudioChannelLabel_VerticalHeightLeft => mixer::Channel::TopFrontLeft,
sys::kAudioChannelLabel_VerticalHeightCenter => mixer::Channel::TopFrontCenter,
sys::kAudioChannelLabel_VerticalHeightRight => mixer::Channel::TopFrontRight,
sys::kAudioChannelLabel_TopBackLeft => mixer::Channel::TopBackLeft,
sys::kAudioChannelLabel_TopBackCenter => mixer::Channel::TopBackCenter,
sys::kAudioChannelLabel_TopBackRight => mixer::Channel::TopBackRight,
sys::kAudioChannelLabel_Unknown => mixer::Channel::Discrete,
sys::kAudioChannelLabel_Unused => mixer::Channel::Silence,
v => {
eprintln!("Warning: channel label value {} isn't handled", v);
mixer::Channel::Silence
}
}
}
}
fn set_notification_runloop() {
let address = AudioObjectPropertyAddress {
mSelector: kAudioHardwarePropertyRunLoop,
mScope: kAudioObjectPropertyScopeGlobal,
mElement: kAudioObjectPropertyElementMaster,
};
// Ask HAL to manage its own thread for notification by setting the run_loop to NULL.
// Otherwise HAL may use main thread to fire notifications.
let run_loop: CFRunLoopRef = ptr::null_mut();
let size = mem::size_of::<CFRunLoopRef>();
let status =
audio_object_set_property_data(kAudioObjectSystemObject, &address, size, &run_loop);
if status != NO_ERR {
cubeb_log!("Could not make global CoreAudio notifications use their own thread.");
}
}
fn create_device_info(devid: AudioDeviceID, devtype: DeviceType) -> Option<device_info> {
assert_ne!(devid, kAudioObjectSystemObject);
debug_assert_running_serially();
let mut flags = match devtype {
DeviceType::INPUT => device_flags::DEV_INPUT,
DeviceType::OUTPUT => device_flags::DEV_OUTPUT,
_ => panic!("Only accept input or output type"),
};
if devid == kAudioObjectUnknown {
cubeb_log!("Using the system default device");
flags |= device_flags::DEV_SELECTED_DEFAULT;
get_default_device(devtype).map(|id| device_info { id, flags })
} else {
Some(device_info { id: devid, flags })
}
}
fn create_stream_description(stream_params: &StreamParams) -> Result<AudioStreamBasicDescription> {
assert!(stream_params.rate() > 0);
assert!(stream_params.channels() > 0);
let mut desc = AudioStreamBasicDescription::default();
match stream_params.format() {
SampleFormat::S16LE => {
desc.mBitsPerChannel = 16;
desc.mFormatFlags = kAudioFormatFlagIsSignedInteger;
}
SampleFormat::S16BE => {
desc.mBitsPerChannel = 16;
desc.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsBigEndian;
}
SampleFormat::Float32LE => {
desc.mBitsPerChannel = 32;
desc.mFormatFlags = kAudioFormatFlagIsFloat;
}
SampleFormat::Float32BE => {
desc.mBitsPerChannel = 32;
desc.mFormatFlags = kAudioFormatFlagIsFloat | kAudioFormatFlagIsBigEndian;
}
_ => {
return Err(Error::invalid_format());
}
}
desc.mFormatID = kAudioFormatLinearPCM;
desc.mFormatFlags |= kLinearPCMFormatFlagIsPacked;
desc.mSampleRate = f64::from(stream_params.rate());
desc.mChannelsPerFrame = stream_params.channels();
desc.mBytesPerFrame = (desc.mBitsPerChannel / 8) * desc.mChannelsPerFrame;
desc.mFramesPerPacket = 1;
desc.mBytesPerPacket = desc.mBytesPerFrame * desc.mFramesPerPacket;
desc.mReserved = 0;
Ok(desc)
}
fn set_volume(unit: AudioUnit, volume: f32) -> Result<()> {
assert!(!unit.is_null());
let r = audio_unit_set_parameter(
unit,
kHALOutputParam_Volume,
kAudioUnitScope_Global,
0,
volume,
0,
);
if r == NO_ERR {
Ok(())
} else {
cubeb_log!("AudioUnitSetParameter/kHALOutputParam_Volume rv={}", r);
Err(Error::error())
}
}
fn get_volume(unit: AudioUnit) -> Result<f32> {
assert!(!unit.is_null());
let mut volume: f32 = 0.0;
let r = audio_unit_get_parameter(
unit,
kHALOutputParam_Volume,
kAudioUnitScope_Global,
0,
&mut volume,
);
if r == NO_ERR {
Ok(volume)
} else {
cubeb_log!("AudioUnitGetParameter/kHALOutputParam_Volume rv={}", r);
Err(Error::error())
}
}
fn set_input_mute(unit: AudioUnit, mute: bool) -> Result<()> {
assert!(!unit.is_null());
let mute: u32 = mute.into();
let mut old_mute: u32 = 0;
let r = audio_unit_get_property(
unit,
kAUVoiceIOProperty_MuteOutput,
kAudioUnitScope_Global,
AU_IN_BUS,
&mut old_mute,
&mut mem::size_of::<u32>(),
);
if r != NO_ERR {
cubeb_log!(
"AudioUnitGetProperty/kAUVoiceIOProperty_MuteOutput rv={}",
r
);
return Err(Error::error());
}
if old_mute == mute {
return Ok(());
}
let r = audio_unit_set_property(
unit,
kAUVoiceIOProperty_MuteOutput,
kAudioUnitScope_Global,
AU_IN_BUS,
&mute,
mem::size_of::<u32>(),
);
if r == NO_ERR {
Ok(())
} else {
cubeb_log!(
"AudioUnitSetProperty/kAUVoiceIOProperty_MuteOutput rv={}",
r
);
Err(Error::error())
}
}
fn set_input_processing_params(unit: AudioUnit, params: InputProcessingParams) -> Result<()> {
assert!(!unit.is_null());
let aec = params.contains(InputProcessingParams::ECHO_CANCELLATION);
let ns = params.contains(InputProcessingParams::NOISE_SUPPRESSION);
let agc = params.contains(InputProcessingParams::AUTOMATIC_GAIN_CONTROL);
assert_eq!(aec, ns);
let mut old_agc: u32 = 0;
let r = audio_unit_get_property(
unit,
kAUVoiceIOProperty_VoiceProcessingEnableAGC,
kAudioUnitScope_Global,
AU_IN_BUS,
&mut old_agc,
&mut mem::size_of::<u32>(),
);
if r != NO_ERR {
cubeb_log!(
"AudioUnitGetProperty/kAUVoiceIOProperty_VoiceProcessingEnableAGC rv={}",
r
);
return Err(Error::error());
}
if (old_agc == 1) != agc {
let agc = u32::from(agc);
let r = audio_unit_set_property(
unit,
kAUVoiceIOProperty_VoiceProcessingEnableAGC,
kAudioUnitScope_Global,
AU_IN_BUS,
&agc,
mem::size_of::<u32>(),
);
if r != NO_ERR {
cubeb_log!(
"AudioUnitSetProperty/kAUVoiceIOProperty_VoiceProcessingEnableAGC rv={}",
r
);
return Err(Error::error());
}
cubeb_log!(
"set_input_processing_params on unit {:p} - set agc: {}",
unit,
agc
);
}
let mut old_bypass: u32 = 0;
let r = audio_unit_get_property(
unit,
kAUVoiceIOProperty_BypassVoiceProcessing,
kAudioUnitScope_Global,
AU_IN_BUS,
&mut old_bypass,
&mut mem::size_of::<u32>(),
);
if r != NO_ERR {
cubeb_log!(
"AudioUnitGetProperty/kAUVoiceIOProperty_BypassVoiceProcessing rv={}",
r
);
return Err(Error::error());
}
let bypass = u32::from(!aec);
if old_bypass != bypass {
let r = audio_unit_set_property(
unit,
kAUVoiceIOProperty_BypassVoiceProcessing,
kAudioUnitScope_Global,
AU_IN_BUS,
&bypass,
mem::size_of::<u32>(),
);
if r != NO_ERR {
cubeb_log!(
"AudioUnitSetProperty/kAUVoiceIOProperty_BypassVoiceProcessing rv={}",
r
);
return Err(Error::error());
}
cubeb_log!(
"set_input_processing_params on unit {:p} - set bypass: {}",
unit,
bypass
);
}
Ok(())
}
fn minimum_resampling_input_frames(
input_rate: f64,
output_rate: f64,
output_frames: usize,
) -> usize {
assert!(!approx_eq!(f64, input_rate, 0_f64));
assert!(!approx_eq!(f64, output_rate, 0_f64));
if approx_eq!(f64, input_rate, output_rate) {
return output_frames;
}
(input_rate * output_frames as f64 / output_rate).ceil() as usize
}
fn audiounit_make_silent(io_data: &AudioBuffer) {
assert!(!io_data.mData.is_null());
let bytes = unsafe {
let ptr = io_data.mData as *mut u8;
let len = io_data.mDataByteSize as usize;
slice::from_raw_parts_mut(ptr, len)
};
for data in bytes.iter_mut() {
*data = 0;
}
}
extern "C" fn audiounit_input_callback(
user_ptr: *mut c_void,
flags: *mut AudioUnitRenderActionFlags,
tstamp: *const AudioTimeStamp,
bus: u32,
input_frames: u32,
_: *mut AudioBufferList,
) -> OSStatus {
enum ErrorHandle {
Return(OSStatus),
Reinit,
}
assert!(input_frames > 0);
assert_eq!(bus, AU_IN_BUS);
assert!(!user_ptr.is_null());
let stm = unsafe { &mut *(user_ptr as *mut AudioUnitStream) };
if unsafe { *flags | kAudioTimeStampHostTimeValid } != 0 {
let now = unsafe { mach_absolute_time() };
let input_latency_frames = compute_input_latency(stm, unsafe { (*tstamp).mHostTime }, now);
stm.total_input_latency_frames
.store(input_latency_frames, Ordering::SeqCst);
}
if stm.stopped.load(Ordering::SeqCst) {
cubeb_log!("({:p}) input stopped", stm as *const AudioUnitStream);
return NO_ERR;
}
let handler = |stm: &mut AudioUnitStream,
flags: *mut AudioUnitRenderActionFlags,
tstamp: *const AudioTimeStamp,
bus: u32,
input_frames: u32|
-> ErrorHandle {
let input_buffer_manager = stm.core_stream_data.input_buffer_manager.as_mut().unwrap();
assert_eq!(
stm.core_stream_data.stm_ptr,
user_ptr as *const AudioUnitStream
);
// `flags` and `tstamp` must be non-null so they can be casted into the references.
assert!(!flags.is_null());
let flags = unsafe { &mut (*flags) };
assert!(!tstamp.is_null());
let tstamp = unsafe { &(*tstamp) };
// Create the AudioBufferList to store input.
let mut input_buffer_list = AudioBufferList::default();
input_buffer_list.mBuffers[0].mDataByteSize =
stm.core_stream_data.input_dev_desc.mBytesPerFrame * input_frames;
input_buffer_list.mBuffers[0].mData = ptr::null_mut();
input_buffer_list.mBuffers[0].mNumberChannels =
stm.core_stream_data.input_dev_desc.mChannelsPerFrame;
input_buffer_list.mNumberBuffers = 1;
debug_assert!(!stm.core_stream_data.input_unit.is_null());
let status = audio_unit_render(
stm.core_stream_data.input_unit,
flags,
tstamp,
bus,
input_frames,
&mut input_buffer_list,
);
if (status != NO_ERR)
&& (status != kAudioUnitErr_CannotDoInCurrentContext
|| stm.core_stream_data.output_unit.is_null())
{
return ErrorHandle::Return(status);
}
let handle = if status == kAudioUnitErr_CannotDoInCurrentContext {
assert!(!stm.core_stream_data.output_unit.is_null());
// kAudioUnitErr_CannotDoInCurrentContext is returned when using a BT
// headset and the profile is changed from A2DP to HFP/HSP. The previous
// output device is no longer valid and must be reset.
// For now state that no error occurred and feed silence, stream will be
// resumed once reinit has completed.
ErrorHandle::Reinit
} else {
assert_eq!(status, NO_ERR);
#[cfg(feature = "audio-dump")]
{
dump_audio(
stm.core_stream_data.audio_dump_input,
input_buffer_list.mBuffers[0].mData,
input_frames * stm.core_stream_data.input_dev_desc.mChannelsPerFrame,
);
}
input_buffer_manager
.push_data(input_buffer_list.mBuffers[0].mData, input_frames as usize);
ErrorHandle::Return(status)
};
// Full Duplex. We'll call data_callback in the AudioUnit output callback. Record this
// callback for logging.
if !stm.core_stream_data.output_unit.is_null() {
let input_callback_data = InputCallbackData {
bytes: input_buffer_list.mBuffers[0].mDataByteSize,
rendered_frames: input_frames,
total_available: input_buffer_manager.available_frames(),
channels: input_buffer_list.mBuffers[0].mNumberChannels,
num_buf: input_buffer_list.mNumberBuffers,
};
stm.core_stream_data
.input_logging
.as_mut()
.unwrap()
.push(input_callback_data);
return handle;
}
cubeb_alogv!(
"({:p}) input: buffers {}, size {}, channels {}, rendered frames {}, total frames {}.",
stm.core_stream_data.stm_ptr,
input_buffer_list.mNumberBuffers,
input_buffer_list.mBuffers[0].mDataByteSize,
input_buffer_list.mBuffers[0].mNumberChannels,
input_frames,
input_buffer_manager.available_frames()
);
// Input only. Call the user callback through resampler.
// Resampler will deliver input buffer in the correct rate.
assert!(input_frames as usize <= input_buffer_manager.available_frames());
stm.frames_read.fetch_add(
input_buffer_manager.available_frames(),
atomic::Ordering::SeqCst,
);
let mut total_input_frames = input_buffer_manager.available_frames() as i64;
let input_buffer =
input_buffer_manager.get_linear_data(input_buffer_manager.available_frames());
let outframes = stm.core_stream_data.resampler.fill(
input_buffer,
&mut total_input_frames,
ptr::null_mut(),
0,
);
if outframes < 0 {
if !stm.stopped.swap(true, Ordering::SeqCst) {
stm.notify_state_changed(State::Error);
// Use a new thread, through the queue, to avoid deadlock when calling
// AudioOutputUnitStop method from inside render callback
stm.queue.clone().run_async(move || {
stm.core_stream_data.stop_audiounits();
});
}
return ErrorHandle::Return(status);
}
if outframes < total_input_frames {
stm.draining.store(true, Ordering::SeqCst);
}
handle
};
// If the stream is drained, do nothing.
let handle = if !stm.draining.load(Ordering::SeqCst) {
handler(stm, flags, tstamp, bus, input_frames)
} else {
ErrorHandle::Return(NO_ERR)
};
// If the input (input-only stream) is drained, cancel this callback. Whenever an output
// is involved, the output callback handles stopping all units and notifying of state.
if stm.core_stream_data.output_unit.is_null()
&& stm.draining.load(Ordering::SeqCst)
&& !stm.stopped.swap(true, Ordering::SeqCst)
{
cubeb_alog!("({:p}) Input-only drained.", stm as *const AudioUnitStream);
stm.notify_state_changed(State::Drained);
// Use a new thread, through the queue, to avoid deadlock when calling
// AudioOutputUnitStop method from inside render callback
let stm_ptr = user_ptr as usize;
stm.queue.clone().run_async(move || {
let stm = unsafe { &mut *(stm_ptr as *mut AudioUnitStream) };
stm.core_stream_data.stop_audiounits();
});
}
match handle {
ErrorHandle::Reinit => {
stm.reinit_async();
NO_ERR
}
ErrorHandle::Return(s) => s,
}
}
fn host_time_to_ns(ctx: &AudioUnitContext, host_time: u64) -> u64 {
let mut rv: f64 = host_time as f64;
rv *= ctx.host_time_to_ns_ratio.0 as f64;
rv /= ctx.host_time_to_ns_ratio.1 as f64;
rv as u64
}
fn compute_output_latency(stm: &AudioUnitStream, audio_output_time: u64, now: u64) -> u32 {
const NS2S: u64 = 1_000_000_000;
let output_hw_rate = stm.core_stream_data.output_dev_desc.mSampleRate as u64;
let fixed_latency_ns =
(stm.output_device_latency_frames.load(Ordering::SeqCst) as u64 * NS2S) / output_hw_rate;
// The total output latency is the timestamp difference + the stream latency + the hardware
// latency.
let total_output_latency_ns =
fixed_latency_ns + host_time_to_ns(stm.context, audio_output_time.saturating_sub(now));
(total_output_latency_ns * output_hw_rate / NS2S) as u32
}
fn compute_input_latency(stm: &AudioUnitStream, audio_input_time: u64, now: u64) -> u32 {
const NS2S: u64 = 1_000_000_000;
let input_hw_rate = stm.core_stream_data.input_dev_desc.mSampleRate as u64;
let fixed_latency_ns =
(stm.input_device_latency_frames.load(Ordering::SeqCst) as u64 * NS2S) / input_hw_rate;
// The total input latency is the timestamp difference + the stream latency +
// the hardware latency.
let total_input_latency_ns =
host_time_to_ns(stm.context, now.saturating_sub(audio_input_time)) + fixed_latency_ns;
(total_input_latency_ns * input_hw_rate / NS2S) as u32
}
extern "C" fn audiounit_output_callback(
user_ptr: *mut c_void,
flags: *mut AudioUnitRenderActionFlags,
tstamp: *const AudioTimeStamp,
bus: u32,
output_frames: u32,
out_buffer_list: *mut AudioBufferList,
) -> OSStatus {
assert_eq!(bus, AU_OUT_BUS);
assert!(!out_buffer_list.is_null());
assert!(!user_ptr.is_null());
let stm = unsafe { &mut *(user_ptr as *mut AudioUnitStream) };
if output_frames == 0 {
cubeb_alog!(
"({:p}) output callback empty.",
stm as *const AudioUnitStream
);
return NO_ERR;
}
let out_buffer_list_ref = unsafe { &mut (*out_buffer_list) };
assert_eq!(out_buffer_list_ref.mNumberBuffers, 1);
let buffers = unsafe {
let ptr = out_buffer_list_ref.mBuffers.as_mut_ptr();
let len = out_buffer_list_ref.mNumberBuffers as usize;
slice::from_raw_parts_mut(ptr, len)
};
if stm.stopped.load(Ordering::SeqCst) {
cubeb_alog!("({:p}) output stopped.", stm as *const AudioUnitStream);
audiounit_make_silent(&buffers[0]);
#[cfg(feature = "audio-dump")]
{
dump_audio(
stm.core_stream_data.audio_dump_output,
buffers[0].mData,
output_frames * stm.core_stream_data.output_dev_desc.mChannelsPerFrame,
);
}
return NO_ERR;
}
if stm.draining.load(Ordering::SeqCst) {
// Cancel all callbacks. For input-only streams, the input callback handles
// cancelling itself.
audiounit_make_silent(&buffers[0]);
#[cfg(feature = "audio-dump")]
{
dump_audio(
stm.core_stream_data.audio_dump_output,
buffers[0].mData,
output_frames * stm.core_stream_data.output_dev_desc.mChannelsPerFrame,
);
}
if !stm.stopped.swap(true, Ordering::SeqCst) {
cubeb_alog!("({:p}) output drained.", stm as *const AudioUnitStream);
stm.notify_state_changed(State::Drained);
// Use a new thread, through the queue, to avoid deadlock when calling
// AudioOutputUnitStop method from inside render callback
stm.queue.clone().run_async(move || {
stm.core_stream_data.stop_audiounits();
});
}
return NO_ERR;
}
let now = unsafe { mach_absolute_time() };
if unsafe { *flags | kAudioTimeStampHostTimeValid } != 0 {
let output_latency_frames =
compute_output_latency(stm, unsafe { (*tstamp).mHostTime }, now);
stm.total_output_latency_frames
.store(output_latency_frames, Ordering::SeqCst);
}
// Get output buffer
let output_buffer = match stm.core_stream_data.mixer.as_mut() {
None => buffers[0].mData,
Some(mixer) => {
// If remixing needs to occur, we can't directly work in our final
// destination buffer as data may be overwritten or too small to start with.
mixer.update_buffer_size(output_frames as usize);
mixer.get_buffer_mut_ptr() as *mut c_void
}
};
let prev_frames_written = stm.frames_written.load(Ordering::SeqCst);
stm.frames_written
.fetch_add(output_frames as usize, Ordering::SeqCst);
// Also get the input buffer if the stream is duplex
let (input_buffer, mut input_frames) = if !stm.core_stream_data.input_unit.is_null() {
let input_logging = &mut stm.core_stream_data.input_logging.as_mut().unwrap();
if input_logging.is_empty() {
cubeb_alogv!("no audio input data in output callback");
} else {
while let Some(input_callback_data) = input_logging.pop() {
cubeb_alogv!(
"input: buffers {}, size {}, channels {}, rendered frames {}, total frames {}.",
input_callback_data.num_buf,
input_callback_data.bytes,
input_callback_data.channels,
input_callback_data.rendered_frames,
input_callback_data.total_available
);
}
}
let input_buffer_manager = stm.core_stream_data.input_buffer_manager.as_mut().unwrap();
assert_ne!(stm.core_stream_data.input_dev_desc.mChannelsPerFrame, 0);
// If the output callback came first and this is a duplex stream, we need to
// fill in some additional silence in the resampler.
// Otherwise, if we had more than expected callbacks in a row, or we're
// currently switching, we add some silence as well to compensate for the
// fact that we're lacking some input data.
let input_frames_needed = minimum_resampling_input_frames(
stm.core_stream_data.input_dev_desc.mSampleRate,
f64::from(stm.core_stream_data.output_stream_params.rate()),
output_frames as usize,
);
let buffered_input_frames = input_buffer_manager.available_frames();
// Else if the input has buffered a lot already because the output started late, we
// need to trim the input buffer
if prev_frames_written == 0 && buffered_input_frames > input_frames_needed {
input_buffer_manager.trim(input_frames_needed);
let popped_frames = buffered_input_frames - input_frames_needed;
cubeb_alog!("Dropping {} frames in input buffer.", popped_frames);
}
let input_frames = if input_frames_needed > buffered_input_frames
&& (stm.switching_device.load(Ordering::SeqCst)
|| stm.reinit_pending.load(Ordering::SeqCst)
|| stm.frames_read.load(Ordering::SeqCst) == 0)
{
// The silent frames will be inserted in `get_linear_data` below.
let silent_frames_to_push = input_frames_needed - buffered_input_frames;
cubeb_alog!(
"({:p}) Missing Frames: {} will append {} frames of input silence.",
stm.core_stream_data.stm_ptr,
if stm.frames_read.load(Ordering::SeqCst) == 0 {
"input hasn't started,"
} else if stm.switching_device.load(Ordering::SeqCst) {
"device switching,"
} else {
"reinit pending,"
},
silent_frames_to_push
);
input_frames_needed
} else {
buffered_input_frames
};
stm.frames_read.fetch_add(input_frames, Ordering::SeqCst);
(
input_buffer_manager.get_linear_data(input_frames),
input_frames as i64,
)
} else {
(ptr::null_mut::<c_void>(), 0)
};
cubeb_alogv!(
"({:p}) output: buffers {}, size {}, channels {}, frames {}.",
stm as *const AudioUnitStream,
buffers.len(),
buffers[0].mDataByteSize,
buffers[0].mNumberChannels,
output_frames
);
assert_ne!(output_frames, 0);
let outframes = stm.core_stream_data.resampler.fill(
input_buffer,
if input_buffer.is_null() {
ptr::null_mut()
} else {
&mut input_frames
},
output_buffer,
i64::from(output_frames),
);
if outframes < 0 || outframes > i64::from(output_frames) {
audiounit_make_silent(&buffers[0]);
#[cfg(feature = "audio-dump")]
{
dump_audio(
stm.core_stream_data.audio_dump_output,
buffers[0].mData,
output_frames * stm.core_stream_data.output_dev_desc.mChannelsPerFrame,
);
}
if !stm.stopped.swap(true, Ordering::SeqCst) {
stm.notify_state_changed(State::Error);
// Use a new thread, through the queue, to avoid deadlock when calling
// AudioOutputUnitStop method from inside render callback
stm.queue.clone().run_async(move || {
stm.core_stream_data.stop_audiounits();
});
}
return NO_ERR;
}
stm.draining
.store(outframes < i64::from(output_frames), Ordering::SeqCst);
stm.output_callback_timing_data_write
.write(OutputCallbackTimingData {
frames_queued: stm.frames_queued,
timestamp: now,
buffer_size: outframes as u64,
});
stm.frames_queued += outframes as u64;
// Post process output samples.
if stm.draining.load(Ordering::SeqCst) {
// Clear missing frames (silence)
let frames_to_bytes = |frames: usize| -> usize {
let sample_size = cubeb_sample_size(stm.core_stream_data.output_stream_params.format());
let channel_count = stm.core_stream_data.output_stream_params.channels() as usize;
frames * sample_size * channel_count
};
let out_bytes = unsafe {
slice::from_raw_parts_mut(
output_buffer as *mut u8,
frames_to_bytes(output_frames as usize),
)
};
let start = frames_to_bytes(outframes as usize);
for byte in out_bytes.iter_mut().skip(start) {
*byte = 0;
}
}
// Mixing
if stm.core_stream_data.mixer.is_some() {
assert!(
buffers[0].mDataByteSize
>= stm.core_stream_data.output_dev_desc.mBytesPerFrame * output_frames
);
stm.core_stream_data.mixer.as_mut().unwrap().mix(
output_frames as usize,
buffers[0].mData,
buffers[0].mDataByteSize as usize,
);
}
#[cfg(feature = "audio-dump")]
{
dump_audio(
stm.core_stream_data.audio_dump_output,
buffers[0].mData,
output_frames * stm.core_stream_data.output_dev_desc.mChannelsPerFrame,
);
}
NO_ERR
}
#[allow(clippy::cognitive_complexity)]
extern "C" fn audiounit_property_listener_callback(
id: AudioObjectID,
address_count: u32,
addresses: *const AudioObjectPropertyAddress,
user: *mut c_void,
) -> OSStatus {
assert_ne!(address_count, 0);
let stm = unsafe { &mut *(user as *mut AudioUnitStream) };
let addrs = unsafe { slice::from_raw_parts(addresses, address_count as usize) };
if stm.switching_device.load(Ordering::SeqCst) {
cubeb_log!(
"Switching is already taking place. Skipping event for device {}",
id
);
return NO_ERR;
}
stm.switching_device.store(true, Ordering::SeqCst);
let mut explicit_device_dead = false;
cubeb_log!(
"({:p}) Handling {} device changed events for device {}",
stm as *const AudioUnitStream,
address_count,
id
);
for (i, addr) in addrs.iter().enumerate() {
let p = PropertySelector::from(addr.mSelector);
cubeb_log!("Event #{}: {}", i, p);
assert_ne!(p, PropertySelector::Unknown);
if p == PropertySelector::DeviceIsAlive {
explicit_device_dead = true;
}
}
// Handle the events
if explicit_device_dead {
if !stm.stopped.swap(true, Ordering::SeqCst) {
cubeb_log!("The user-selected input or output device is dead, entering error state");
// Use a different thread, through the queue, to avoid deadlock when calling
// Get/SetProperties method from inside notify callback
stm.queue.clone().run_async(move || {
stm.core_stream_data.stop_audiounits();
stm.close_on_error();
});
}
return NO_ERR;
}
{
let callback = stm.device_changed_callback.lock().unwrap();
if let Some(device_changed_callback) = *callback {
cubeb_log!("Calling device changed callback");
unsafe {
device_changed_callback(stm.user_ptr);
}
}
}
cubeb_log!("Reinitializing stream with new device because of device change, async");
stm.reinit_async();
NO_ERR
}
fn get_default_device(devtype: DeviceType) -> Option<AudioObjectID> {
debug_assert_running_serially();
match get_default_device_id(devtype) {
Err(e) => {
cubeb_log!("Cannot get default {:?} device. Error: {}", devtype, e);
None
}
Ok(id) if id == kAudioObjectUnknown => {
cubeb_log!("Get an invalid default {:?} device: {}", devtype, id);
None
}
Ok(id) => Some(id),
}
}
fn get_default_device_id(devtype: DeviceType) -> std::result::Result<AudioObjectID, OSStatus> {
debug_assert_running_serially();
let address = get_property_address(
match devtype {
DeviceType::INPUT => Property::HardwareDefaultInputDevice,
DeviceType::OUTPUT => Property::HardwareDefaultOutputDevice,
_ => panic!("Unsupport type"),
},
DeviceType::INPUT | DeviceType::OUTPUT,
);
let mut devid: AudioDeviceID = kAudioObjectUnknown;
let mut size = mem::size_of::<AudioDeviceID>();
let status =
audio_object_get_property_data(kAudioObjectSystemObject, &address, &mut size, &mut devid);
if status == NO_ERR {
Ok(devid)
} else {
Err(status)
}
}
fn audiounit_convert_channel_layout(layout: &AudioChannelLayout) -> Result<Vec<mixer::Channel>> {
if layout.mChannelLayoutTag != kAudioChannelLayoutTag_UseChannelDescriptions {
// kAudioChannelLayoutTag_UseChannelBitmap
// kAudioChannelLayoutTag_Mono
// kAudioChannelLayoutTag_Stereo
// ....
cubeb_log!("Only handling UseChannelDescriptions for now.\n");
return Err(Error::error());
}
let channel_descriptions = unsafe {
slice::from_raw_parts(
layout.mChannelDescriptions.as_ptr(),
layout.mNumberChannelDescriptions as usize,
)
};
let mut channels = Vec::with_capacity(layout.mNumberChannelDescriptions as usize);
for description in channel_descriptions {
let label = CAChannelLabel(description.mChannelLabel);
channels.push(label.into());
}
Ok(channels)
}
fn audiounit_get_preferred_channel_layout(output_unit: AudioUnit) -> Result<Vec<mixer::Channel>> {
debug_assert_running_serially();
let mut rv = NO_ERR;
let mut size: usize = 0;
rv = audio_unit_get_property_info(
output_unit,
kAudioDevicePropertyPreferredChannelLayout,
kAudioUnitScope_Output,
AU_OUT_BUS,
&mut size,
None,
);
if rv != NO_ERR {
cubeb_log!(
"AudioUnitGetPropertyInfo/kAudioDevicePropertyPreferredChannelLayout rv={}",
rv
);
return Err(Error::error());
}
debug_assert!(size > 0);
let mut layout = make_sized_audio_channel_layout(size);
rv = audio_unit_get_property(
output_unit,
kAudioDevicePropertyPreferredChannelLayout,
kAudioUnitScope_Output,
AU_OUT_BUS,
layout.as_mut(),
&mut size,
);
if rv != NO_ERR {
cubeb_log!(
"AudioUnitGetProperty/kAudioDevicePropertyPreferredChannelLayout rv={}",
rv
);
return Err(Error::error());
}
audiounit_convert_channel_layout(layout.as_ref())
}
// This is for output AudioUnit only. Calling this by input-only AudioUnit is prone
// to crash intermittently.
fn audiounit_get_current_channel_layout(output_unit: AudioUnit) -> Result<Vec<mixer::Channel>> {
debug_assert_running_serially();
let mut rv = NO_ERR;
let mut size: usize = 0;
rv = audio_unit_get_property_info(
output_unit,
kAudioUnitProperty_AudioChannelLayout,
kAudioUnitScope_Output,
AU_OUT_BUS,
&mut size,
None,
);
if rv != NO_ERR {
cubeb_log!(
"AudioUnitGetPropertyInfo/kAudioUnitProperty_AudioChannelLayout rv={}",
rv
);
return Err(Error::error());
}
debug_assert!(size > 0);
let mut layout = make_sized_audio_channel_layout(size);
rv = audio_unit_get_property(
output_unit,
kAudioUnitProperty_AudioChannelLayout,
kAudioUnitScope_Output,
AU_OUT_BUS,
layout.as_mut(),
&mut size,
);
if rv != NO_ERR {
cubeb_log!(
"AudioUnitGetProperty/kAudioUnitProperty_AudioChannelLayout rv={}",
rv
);
return Err(Error::error());
}
audiounit_convert_channel_layout(layout.as_ref())
}
fn get_channel_layout(output_unit: AudioUnit) -> Result<Vec<mixer::Channel>> {
debug_assert_running_serially();
audiounit_get_current_channel_layout(output_unit)
.or_else(|_| {
// The kAudioUnitProperty_AudioChannelLayout property isn't known before
// macOS 10.12, attempt another method.
cubeb_log!(
"Cannot get current channel layout for audiounit @ {:p}. Trying preferred channel layout.",
output_unit
);
audiounit_get_preferred_channel_layout(output_unit)
})
}
fn start_audiounit(unit: AudioUnit) -> Result<()> {
let status = audio_output_unit_start(unit);
if status == NO_ERR {
Ok(())
} else {
cubeb_log!("Cannot start audiounit @ {:p}. Error: {}", unit, status);
Err(Error::error())
}
}
fn stop_audiounit(unit: AudioUnit) -> Result<()> {
let status = audio_output_unit_stop(unit);
if status == NO_ERR {
Ok(())
} else {
cubeb_log!("Cannot stop audiounit @ {:p}. Error: {}", unit, status);
Err(Error::error())
}
}
fn create_audiounit(device: &device_info) -> Result<AudioUnit> {
assert!(device
.flags
.intersects(device_flags::DEV_INPUT | device_flags::DEV_OUTPUT));
assert!(!device
.flags
.contains(device_flags::DEV_INPUT | device_flags::DEV_OUTPUT));
debug_assert_running_serially();
let unit = create_blank_audiounit()?;
let mut bus = AU_OUT_BUS;
if device.flags.contains(device_flags::DEV_INPUT) {
// Input only.
if let Err(e) = enable_audiounit_scope(unit, DeviceType::INPUT, true) {
cubeb_log!("Failed to enable audiounit input scope. Error: {}", e);
dispose_audio_unit(unit);
return Err(Error::error());
}
if let Err(e) = enable_audiounit_scope(unit, DeviceType::OUTPUT, false) {
cubeb_log!("Failed to disable audiounit output scope. Error: {}", e);
dispose_audio_unit(unit);
return Err(Error::error());
}
bus = AU_IN_BUS;
}
if device.flags.contains(device_flags::DEV_OUTPUT) {
// Output only.
if let Err(e) = enable_audiounit_scope(unit, DeviceType::OUTPUT, true) {
cubeb_log!("Failed to enable audiounit output scope. Error: {}", e);
dispose_audio_unit(unit);
return Err(Error::error());
}
if let Err(e) = enable_audiounit_scope(unit, DeviceType::INPUT, false) {
cubeb_log!("Failed to disable audiounit input scope. Error: {}", e);
dispose_audio_unit(unit);
return Err(Error::error());
}
bus = AU_OUT_BUS;
}
if let Err(e) = set_device_to_audiounit(unit, device.id, bus) {
cubeb_log!(
"Failed to set device {} to the created audiounit. Error: {}",
device.id,
e
);
dispose_audio_unit(unit);
return Err(Error::error());
}
Ok(unit)
}
fn get_voiceprocessing_audiounit(
shared_voice_processing_unit: &mut SharedVoiceProcessingUnitManager,
in_device: &device_info,
out_device: &device_info,
) -> Result<OwningHandle<VoiceProcessingUnit>> {
debug_assert_running_serially();
assert!(in_device.flags.contains(device_flags::DEV_INPUT));
assert!(!in_device.flags.contains(device_flags::DEV_OUTPUT));
assert!(!out_device.flags.contains(device_flags::DEV_INPUT));
let unit_handle = shared_voice_processing_unit.take_or_create();
if let Err(e) = unit_handle {
cubeb_log!(
"Failed to create shared voiceprocessing audiounit. Error: {}",
e
);
return Err(Error::error());
}
let mut unit_handle = unit_handle.unwrap();
if let Err(e) = set_device_to_audiounit(unit_handle.as_mut().unit, in_device.id, AU_IN_BUS) {
cubeb_log!(
"Failed to set in device {} to the created audiounit. Error: {}",
in_device.id,
e
);
return Err(Error::error());
}
let has_output = out_device.id != kAudioObjectUnknown;
if let Err(e) =
enable_audiounit_scope(unit_handle.as_mut().unit, DeviceType::OUTPUT, has_output)
{
cubeb_log!("Failed to enable audiounit input scope. Error: {}", e);
return Err(Error::error());
}
if has_output {
if let Err(e) =
set_device_to_audiounit(unit_handle.as_mut().unit, out_device.id, AU_OUT_BUS)
{
cubeb_log!(
"Failed to set out device {} to the created audiounit. Error: {}",
out_device.id,
e
);
return Err(Error::error());
}
}
Ok(unit_handle)
}
fn enable_audiounit_scope(
unit: AudioUnit,
devtype: DeviceType,
enable_io: bool,
) -> std::result::Result<(), OSStatus> {
assert!(!unit.is_null());
let enable = u32::from(enable_io);
let (scope, element) = match devtype {
DeviceType::INPUT => (kAudioUnitScope_Input, AU_IN_BUS),
DeviceType::OUTPUT => (kAudioUnitScope_Output, AU_OUT_BUS),
_ => panic!(
"Enable AudioUnit {:?} with unsupported type: {:?}",
unit, devtype
),
};
let status = audio_unit_set_property(
unit,
kAudioOutputUnitProperty_EnableIO,
scope,
element,
&enable,
mem::size_of::<u32>(),
);
if status == NO_ERR {
Ok(())
} else {
Err(status)
}
}
fn set_device_to_audiounit(
unit: AudioUnit,
device_id: AudioObjectID,
bus: AudioUnitElement,
) -> std::result::Result<(), OSStatus> {
assert!(!unit.is_null());
let status = audio_unit_set_property(
unit,
kAudioOutputUnitProperty_CurrentDevice,
kAudioUnitScope_Global,
bus,
&device_id,
mem::size_of::<AudioDeviceID>(),
);
if status == NO_ERR {
Ok(())
} else {
Err(status)
}
}
fn create_typed_audiounit(sub_type: c_uint) -> Result<AudioUnit> {
let desc = AudioComponentDescription {
componentType: kAudioUnitType_Output,
componentSubType: sub_type,
componentManufacturer: kAudioUnitManufacturer_Apple,
componentFlags: 0,
componentFlagsMask: 0,
};
let comp = unsafe { AudioComponentFindNext(ptr::null_mut(), &desc) };
if comp.is_null() {
cubeb_log!("Could not find matching audio hardware.");
return Err(Error::error());
}
let mut unit: AudioUnit = ptr::null_mut();
let status = unsafe { AudioComponentInstanceNew(comp, &mut unit) };
if status == NO_ERR {
assert!(!unit.is_null());
Ok(unit)
} else {
cubeb_log!("Fail to get a new AudioUnit. Error: {}", status);
Err(Error::error())
}
}
fn create_blank_audiounit() -> Result<AudioUnit> {
#[cfg(not(target_os = "ios"))]
return create_typed_audiounit(kAudioUnitSubType_HALOutput);
#[cfg(target_os = "ios")]
return create_typed_audiounit(kAudioUnitSubType_RemoteIO);
}
fn create_voiceprocessing_audiounit() -> Result<VoiceProcessingUnit> {
let res = create_typed_audiounit(kAudioUnitSubType_VoiceProcessingIO);
if res.is_err() {
return Err(Error::error());
}
match get_default_device(DeviceType::OUTPUT) {
None => {
cubeb_log!("Could not get default output device in order to undo vpio ducking");
}
Some(id) => {
let r = audio_device_duck(id, 1.0, ptr::null_mut(), 0.5);
if r != NO_ERR {
cubeb_log!(
"Failed to undo ducking of voiceprocessing on output device {}. Proceeding... Error: {}",
id,
r
);
}
}
};
res.map(|unit| VoiceProcessingUnit { unit })
}
fn get_buffer_size(unit: AudioUnit, devtype: DeviceType) -> std::result::Result<u32, OSStatus> {
assert!(!unit.is_null());
let (scope, element) = match devtype {
DeviceType::INPUT => (kAudioUnitScope_Output, AU_IN_BUS),
DeviceType::OUTPUT => (kAudioUnitScope_Input, AU_OUT_BUS),
_ => panic!(
"Get buffer size of AudioUnit {:?} with unsupported type: {:?}",
unit, devtype
),
};
let mut frames: u32 = 0;
let mut size = mem::size_of::<u32>();
let status = audio_unit_get_property(
unit,
kAudioDevicePropertyBufferFrameSize,
scope,
element,
&mut frames,
&mut size,
);
if status == NO_ERR {
Ok(frames)
} else {
Err(status)
}
}
fn set_buffer_size(
unit: AudioUnit,
devtype: DeviceType,
frames: u32,
) -> std::result::Result<(), OSStatus> {
assert!(!unit.is_null());
let (scope, element) = match devtype {
DeviceType::INPUT => (kAudioUnitScope_Output, AU_IN_BUS),
DeviceType::OUTPUT => (kAudioUnitScope_Input, AU_OUT_BUS),
_ => panic!(
"Set buffer size of AudioUnit {:?} with unsupported type: {:?}",
unit, devtype
),
};
let status = audio_unit_set_property(
unit,
kAudioDevicePropertyBufferFrameSize,
scope,
element,
&frames,
mem::size_of_val(&frames),
);
if status == NO_ERR {
Ok(())
} else {
Err(status)
}
}
#[allow(clippy::mutex_atomic)] // The mutex needs to be fed into Condvar::wait_timeout.
fn set_buffer_size_sync(unit: AudioUnit, devtype: DeviceType, frames: u32) -> Result<()> {
let current_frames = get_buffer_size(unit, devtype).map_err(|e| {
cubeb_log!(
"Cannot get buffer size of AudioUnit {:?} for {:?}. Error: {}",
unit,
devtype,
e
);
Error::error()
})?;
if frames == current_frames {
cubeb_log!(
"The buffer frame size of AudioUnit {:?} for {:?} is already {}",
unit,
devtype,
frames
);
return Ok(());
}
let waiting_time = Duration::from_millis(100);
let pair = Arc::new((Mutex::new(false), Condvar::new()));
let mut pair2 = pair.clone();
let pair_ptr = &mut pair2;
assert_eq!(
audio_unit_add_property_listener(
unit,
kAudioDevicePropertyBufferFrameSize,
buffer_size_changed_callback,
pair_ptr,
),
NO_ERR
);
let _teardown = finally(|| {
assert_eq!(
audio_unit_remove_property_listener_with_user_data(
unit,
kAudioDevicePropertyBufferFrameSize,
buffer_size_changed_callback,
pair_ptr,
),
NO_ERR
);
});
set_buffer_size(unit, devtype, frames).map_err(|e| {
cubeb_log!(
"Failed to set buffer size for AudioUnit {:?} for {:?}. Error: {}",
unit,
devtype,
e
);
Error::error()
})?;
let (lock, cvar) = &*pair;
let changed = lock.lock().unwrap();
if !*changed {
let (chg, timeout_res) = cvar.wait_timeout(changed, waiting_time).unwrap();
if timeout_res.timed_out() {
cubeb_log!(
"Timed out for waiting the buffer frame size setting of AudioUnit {:?} for {:?}",
unit,
devtype
);
}
if !*chg {
return Err(Error::error());
}
}
let new_frames = get_buffer_size(unit, devtype).map_err(|e| {
cubeb_log!(
"Cannot get new buffer size of AudioUnit {:?} for {:?}. Error: {}",
unit,
devtype,
e
);
Error::error()
})?;
cubeb_log!(
"The new buffer frames size of AudioUnit {:?} for {:?} is {}",
unit,
devtype,
new_frames
);
extern "C" fn buffer_size_changed_callback(
in_client_data: *mut c_void,
_in_unit: AudioUnit,
in_property_id: AudioUnitPropertyID,
in_scope: AudioUnitScope,
in_element: AudioUnitElement,
) {
if in_scope == 0 {
// filter out the callback for global scope.
return;
}
assert!(in_element == AU_IN_BUS || in_element == AU_OUT_BUS);
assert_eq!(in_property_id, kAudioDevicePropertyBufferFrameSize);
let pair = unsafe { &mut *(in_client_data as *mut Arc<(Mutex<bool>, Condvar)>) };
let (lock, cvar) = &**pair;
let mut changed = lock.lock().unwrap();
*changed = true;
cvar.notify_one();
}
Ok(())
}
fn convert_uint32_into_string(data: u32) -> CString {
let empty = CString::default();
if data == 0 {
return empty;
}
// Reverse 0xWXYZ into 0xZYXW.
let mut buffer = vec![b'\x00'; 4]; // 4 bytes for uint32.
buffer[0] = (data >> 24) as u8;
buffer[1] = (data >> 16) as u8;
buffer[2] = (data >> 8) as u8;
buffer[3] = (data) as u8;
// CString::new() will consume the input bytes vec and add a '\0' at the
// end of the bytes. The input bytes vec must not contain any 0 bytes in
// it in case causing memory leaks.
CString::new(buffer).unwrap_or(empty)
}
fn get_channel_count(
devid: AudioObjectID,
devtype: DeviceType,
) -> std::result::Result<u32, OSStatus> {
assert_ne!(devid, kAudioObjectUnknown);
debug_assert_running_serially();
let devstreams = get_device_streams(devid, devtype)?;
let mut count: u32 = 0;
for ds in devstreams {
if devtype == DeviceType::INPUT
&& CoreStreamData::should_force_vpio_for_input_device(ds.device)
{
count += 1;
} else {
count += get_stream_virtual_format(ds.stream)
.map(|f| f.mChannelsPerFrame)
.unwrap_or(0);
}
}
Ok(count)
}
fn get_range_of_sample_rates(
devid: AudioObjectID,
devtype: DeviceType,
) -> std::result::Result<(f64, f64), String> {
debug_assert_running_serially();
let result = get_ranges_of_device_sample_rate(devid, devtype);
if let Err(e) = result {
return Err(format!("status {}", e));
}
let rates = result.unwrap();
if rates.is_empty() {
return Err(String::from("No data"));
}
let (mut min, mut max) = (f64::MAX, f64::MIN);
for rate in rates {
if rate.mMaximum > max {
max = rate.mMaximum;
}
if rate.mMinimum < min {
min = rate.mMinimum;
}
}
Ok((min, max))
}
fn get_fixed_latency(devid: AudioObjectID, devtype: DeviceType) -> u32 {
debug_assert_running_serially();
let device_latency = match get_device_latency(devid, devtype) {
Ok(latency) => latency,
Err(e) => {
cubeb_log!(
"Cannot get the device latency for device {} in {:?} scope. Error: {}",
devid,
devtype,
e
);
0 // default device latency
}
};
let stream_latency = get_device_streams(devid, devtype).and_then(|devstreams| {
if devstreams.is_empty() {
cubeb_log!(
"No stream on device {} in {:?} scope!",
devid,
devtype
);
Ok(0) // default stream latency
} else {
get_stream_latency(devstreams[0].stream)
}
}).inspect_err(|e| {
cubeb_log!(
"Cannot get the stream, or the latency of the first stream on device {} in {:?} scope. Error: {}",
devid,
devtype,
e
);
}).unwrap_or(0); // default stream latency
device_latency + stream_latency
}
#[allow(non_upper_case_globals)]
fn get_device_group_id(
id: AudioDeviceID,
devtype: DeviceType,
) -> std::result::Result<CString, OSStatus> {
debug_assert_running_serially();
match get_device_transport_type(id, devtype) {
Ok(kAudioDeviceTransportTypeBuiltIn) => {
cubeb_log!(
"The transport type is {:?}",
convert_uint32_into_string(kAudioDeviceTransportTypeBuiltIn)
);
match get_custom_group_id(id, devtype) {
Some(id) => return Ok(id),
None => {
cubeb_log!("Getting model UID instead.");
}
};
}
Ok(trans_type) => {
cubeb_log!(
"The transport type is {:?}. Getting model UID instead.",
convert_uint32_into_string(trans_type)
);
}
Err(e) => {
cubeb_log!(
"Error: {} when getting transport type. Get model uid instead.",
e
);
}
}
// Some devices (e.g. AirPods) might only set the model-uid in the global scope.
// The query might fail if the scope is input-only or output-only.
get_device_model_uid(id, devtype)
.or_else(|_| get_device_model_uid(id, DeviceType::INPUT | DeviceType::OUTPUT))
.map(|uid| uid.into_cstring())
}
fn get_custom_group_id(id: AudioDeviceID, devtype: DeviceType) -> Option<CString> {
debug_assert_running_serially();
const IMIC: u32 = 0x696D_6963; // "imic" (internal microphone)
const ISPK: u32 = 0x6973_706B; // "ispk" (internal speaker)
const EMIC: u32 = 0x656D_6963; // "emic" (external microphone)
const HDPN: u32 = 0x6864_706E; // "hdpn" (headphone)
match get_device_source(id, devtype) {
s @ Ok(IMIC) | s @ Ok(ISPK) => {
const GROUP_ID: &str = "builtin-internal-mic|spk";
cubeb_log!(
"Using hardcode group id: {} when source is: {:?}.",
GROUP_ID,
convert_uint32_into_string(s.unwrap())
);
return Some(CString::new(GROUP_ID).unwrap());
}
s @ Ok(EMIC) | s @ Ok(HDPN) => {
const GROUP_ID: &str = "builtin-external-mic|hdpn";
cubeb_log!(
"Using hardcode group id: {} when source is: {:?}.",
GROUP_ID,
convert_uint32_into_string(s.unwrap())
);
return Some(CString::new(GROUP_ID).unwrap());
}
Ok(s) => {
cubeb_log!(
"No custom group id when source is: {:?}.",
convert_uint32_into_string(s)
);
}
Err(e) => {
cubeb_log!("Error: {} when getting device source. ", e);
}
}
None
}
fn get_device_label(
id: AudioDeviceID,
devtype: DeviceType,
) -> std::result::Result<StringRef, OSStatus> {
debug_assert_running_serially();
get_device_source_name(id, devtype).or_else(|_| get_device_name(id, devtype))
}
fn get_device_global_uid(id: AudioDeviceID) -> std::result::Result<StringRef, OSStatus> {
debug_assert_running_serially();
get_device_uid(id, DeviceType::INPUT | DeviceType::OUTPUT)
}
#[allow(clippy::cognitive_complexity)]
fn create_cubeb_device_info(
devid: AudioObjectID,
devtype: DeviceType,
) -> Result<ffi::cubeb_device_info> {
if devtype != DeviceType::INPUT && devtype != DeviceType::OUTPUT {
return Err(Error::error());
}
let channels = get_channel_count(devid, devtype).map_err(|e| {
cubeb_log!("Cannot get the channel count. Error: {}", e);
Error::error()
})?;
if channels == 0 {
// Invalid type for this device.
return Err(Error::error());
}
let mut dev_info = ffi::cubeb_device_info {
max_channels: channels,
..Default::default()
};
assert!(
mem::size_of::<ffi::cubeb_devid>() >= mem::size_of_val(&devid),
"cubeb_devid can't represent devid"
);
dev_info.devid = devid as ffi::cubeb_devid;
match get_device_uid(devid, devtype) {
Ok(uid) => {
let c_string = uid.into_cstring();
dev_info.device_id = c_string.into_raw();
}
Err(e) => {
cubeb_log!(
"Cannot get the UID for device {} in {:?} scope. Error: {}",
devid,
devtype,
e
);
}
}
match get_device_group_id(devid, devtype) {
Ok(group_id) => {
dev_info.group_id = group_id.into_raw();
}
Err(e) => {
cubeb_log!(
"Cannot get the model UID for device {} in {:?} scope. Error: {}",
devid,
devtype,
e
);
}
}
let label = match get_device_label(devid, devtype) {
Ok(label) => label.into_cstring(),
Err(e) => {
cubeb_log!(
"Cannot get the label for device {} in {:?} scope. Error: {}",
devid,
devtype,
e
);
CString::default()
}
};
dev_info.friendly_name = label.into_raw();
match get_device_manufacturer(devid, devtype) {
Ok(vendor) => {
let vendor = vendor.into_cstring();
dev_info.vendor_name = vendor.into_raw();
}
Err(e) => {
cubeb_log!(
"Cannot get the manufacturer for device {} in {:?} scope. Error: {}",
devid,
devtype,
e
);
}
}
dev_info.device_type = match devtype {
DeviceType::INPUT => ffi::CUBEB_DEVICE_TYPE_INPUT,
DeviceType::OUTPUT => ffi::CUBEB_DEVICE_TYPE_OUTPUT,
_ => panic!("invalid type"),
};
dev_info.state = ffi::CUBEB_DEVICE_STATE_ENABLED;
dev_info.preferred = match get_default_device(devtype) {
Some(id) if id == devid => ffi::CUBEB_DEVICE_PREF_ALL,
_ => ffi::CUBEB_DEVICE_PREF_NONE,
};
dev_info.format = ffi::CUBEB_DEVICE_FMT_ALL;
dev_info.default_format = ffi::CUBEB_DEVICE_FMT_F32NE;
match get_device_sample_rate(devid, devtype) {
Ok(rate) => {
dev_info.default_rate = rate as u32;
}
Err(e) => {
cubeb_log!(
"Cannot get the sample rate for device {} in {:?} scope. Error: {}",
devid,
devtype,
e
);
}
}
match get_range_of_sample_rates(devid, devtype) {
Ok((min, max)) => {
dev_info.min_rate = min as u32;
dev_info.max_rate = max as u32;
}
Err(e) => {
cubeb_log!(
"Cannot get the range of sample rate for device {} in {:?} scope. Error: {}",
devid,
devtype,
e
);
}
}
let latency = get_fixed_latency(devid, devtype);
let (latency_low, latency_high) = match get_device_buffer_frame_size_range(devid, devtype) {
Ok(range) => (
latency + range.mMinimum as u32,
latency + range.mMaximum as u32,
),
Err(e) => {
cubeb_log!("Cannot get the buffer frame size for device {} in {:?} scope. Using default value instead. Error: {}", devid, devtype, e);
(
10 * dev_info.default_rate / 1000,
100 * dev_info.default_rate / 1000,
)
}
};
dev_info.latency_lo = latency_low;
dev_info.latency_hi = latency_high;
Ok(dev_info)
}
fn destroy_cubeb_device_info(device: &mut ffi::cubeb_device_info) {
// This should be mapped to the memory allocation in `create_cubeb_device_info`.
// The `device_id`, `group_id`, `vendor_name` can be null pointer if the queries
// failed, while `friendly_name` will be assigned to a default empty "" string.
// Set the pointers to null in case it points to some released memory.
unsafe {
if !device.device_id.is_null() {
let _ = CString::from_raw(device.device_id as *mut _);
device.device_id = ptr::null();
}
if !device.group_id.is_null() {
let _ = CString::from_raw(device.group_id as *mut _);
device.group_id = ptr::null();
}
assert!(!device.friendly_name.is_null());
let _ = CString::from_raw(device.friendly_name as *mut _);
device.friendly_name = ptr::null();
if !device.vendor_name.is_null() {
let _ = CString::from_raw(device.vendor_name as *mut _);
device.vendor_name = ptr::null();
}
}
}
fn audiounit_get_devices_of_type(devtype: DeviceType) -> Vec<AudioObjectID> {
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