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Don't define the AVFoundation delegate more than once. #32

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Don't define the AVFoundation delegate more than once. #32

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193 changes: 99 additions & 94 deletions src/backends/av_foundation.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@ use core_foundation::array::CFArray;
use core_foundation::string::CFString;
use lazy_static::lazy_static;
use log::{info, trace};
use objc::runtime::{Object, Sel};
use objc::runtime::{Class, Object, Sel};
use objc::{class, declare::ClassDecl, msg_send, sel, sel_impl};
use unic_langid::LanguageIdentifier;

Expand All @@ -24,109 +24,114 @@ pub(crate) struct AvFoundation {
voice: Option<Voice>,
}

lazy_static! {
static ref NEXT_BACKEND_ID: Mutex<u64> = Mutex::new(0);
}

impl AvFoundation {
pub(crate) fn new() -> Result<Self, Error> {
info!("Initializing AVFoundation backend");
let mut decl = ClassDecl::new("MyNSSpeechSynthesizerDelegate", class!(NSObject))
.ok_or(Error::OperationFailed)?;
decl.add_ivar::<u64>("backend_id");

extern "C" fn speech_synthesizer_did_start_speech_utterance(
this: &Object,
_: Sel,
_synth: *const Object,
utterance: id,
) {
trace!("speech_synthesizer_did_start_speech_utterance");
unsafe {
let backend_id: u64 = *this.get_ivar("backend_id");
let backend_id = BackendId::AvFoundation(backend_id);
trace!("Locking callbacks");
let mut callbacks = CALLBACKS.lock().unwrap();
trace!("Locked");
let callbacks = callbacks.get_mut(&backend_id).unwrap();
if let Some(callback) = callbacks.utterance_begin.as_mut() {
trace!("Calling utterance_begin");
let utterance_id = UtteranceId::AvFoundation(utterance);
callback(utterance_id);
trace!("Called");
}
fn make_speech_sythesizer_delegate() -> Result<&'static Class, Error> {
let mut decl = ClassDecl::new("MyNSSpeechSynthesizerDelegate", class!(NSObject))
.ok_or(Error::OperationFailed)?;
decl.add_ivar::<u64>("backend_id");

extern "C" fn speech_synthesizer_did_start_speech_utterance(
this: &Object,
_: Sel,
_synth: *const Object,
utterance: id,
) {
trace!("speech_synthesizer_did_start_speech_utterance");
unsafe {
let backend_id: u64 = *this.get_ivar("backend_id");
let backend_id = BackendId::AvFoundation(backend_id);
trace!("Locking callbacks");
let mut callbacks = CALLBACKS.lock().unwrap();
trace!("Locked");
let callbacks = callbacks.get_mut(&backend_id).unwrap();
if let Some(callback) = callbacks.utterance_begin.as_mut() {
trace!("Calling utterance_begin");
let utterance_id = UtteranceId::AvFoundation(utterance);
callback(utterance_id);
trace!("Called");
}
trace!("Done speech_synthesizer_did_start_speech_utterance");
}
trace!("Done speech_synthesizer_did_start_speech_utterance");
}

extern "C" fn speech_synthesizer_did_finish_speech_utterance(
this: &Object,
_: Sel,
_synth: *const Object,
utterance: id,
) {
trace!("speech_synthesizer_did_finish_speech_utterance");
unsafe {
let backend_id: u64 = *this.get_ivar("backend_id");
let backend_id = BackendId::AvFoundation(backend_id);
trace!("Locking callbacks");
let mut callbacks = CALLBACKS.lock().unwrap();
trace!("Locked");
let callbacks = callbacks.get_mut(&backend_id).unwrap();
if let Some(callback) = callbacks.utterance_end.as_mut() {
trace!("Calling utterance_end");
let utterance_id = UtteranceId::AvFoundation(utterance);
callback(utterance_id);
trace!("Called");
}
extern "C" fn speech_synthesizer_did_finish_speech_utterance(
this: &Object,
_: Sel,
_synth: *const Object,
utterance: id,
) {
trace!("speech_synthesizer_did_finish_speech_utterance");
unsafe {
let backend_id: u64 = *this.get_ivar("backend_id");
let backend_id = BackendId::AvFoundation(backend_id);
trace!("Locking callbacks");
let mut callbacks = CALLBACKS.lock().unwrap();
trace!("Locked");
let callbacks = callbacks.get_mut(&backend_id).unwrap();
if let Some(callback) = callbacks.utterance_end.as_mut() {
trace!("Calling utterance_end");
let utterance_id = UtteranceId::AvFoundation(utterance);
callback(utterance_id);
trace!("Called");
}
trace!("Done speech_synthesizer_did_finish_speech_utterance");
}
trace!("Done speech_synthesizer_did_finish_speech_utterance");
}

extern "C" fn speech_synthesizer_did_cancel_speech_utterance(
this: &Object,
_: Sel,
_synth: *const Object,
utterance: id,
) {
trace!("speech_synthesizer_did_cancel_speech_utterance");
unsafe {
let backend_id: u64 = *this.get_ivar("backend_id");
let backend_id = BackendId::AvFoundation(backend_id);
trace!("Locking callbacks");
let mut callbacks = CALLBACKS.lock().unwrap();
trace!("Locked");
let callbacks = callbacks.get_mut(&backend_id).unwrap();
if let Some(callback) = callbacks.utterance_stop.as_mut() {
trace!("Calling utterance_stop");
let utterance_id = UtteranceId::AvFoundation(utterance);
callback(utterance_id);
trace!("Called");
}
extern "C" fn speech_synthesizer_did_cancel_speech_utterance(
this: &Object,
_: Sel,
_synth: *const Object,
utterance: id,
) {
trace!("speech_synthesizer_did_cancel_speech_utterance");
unsafe {
let backend_id: u64 = *this.get_ivar("backend_id");
let backend_id = BackendId::AvFoundation(backend_id);
trace!("Locking callbacks");
let mut callbacks = CALLBACKS.lock().unwrap();
trace!("Locked");
let callbacks = callbacks.get_mut(&backend_id).unwrap();
if let Some(callback) = callbacks.utterance_stop.as_mut() {
trace!("Calling utterance_stop");
let utterance_id = UtteranceId::AvFoundation(utterance);
callback(utterance_id);
trace!("Called");
}
trace!("Done speech_synthesizer_did_cancel_speech_utterance");
}
trace!("Done speech_synthesizer_did_cancel_speech_utterance");
}

unsafe {
decl.add_method(
sel!(speechSynthesizer:didStartSpeechUtterance:),
speech_synthesizer_did_start_speech_utterance
as extern "C" fn(&Object, Sel, *const Object, id) -> (),
);
decl.add_method(
sel!(speechSynthesizer:didFinishSpeechUtterance:),
speech_synthesizer_did_finish_speech_utterance
as extern "C" fn(&Object, Sel, *const Object, id) -> (),
);
decl.add_method(
sel!(speechSynthesizer:didCancelSpeechUtterance:),
speech_synthesizer_did_cancel_speech_utterance
as extern "C" fn(&Object, Sel, *const Object, id) -> (),
);
}
unsafe {
decl.add_method(
sel!(speechSynthesizer:didStartSpeechUtterance:),
speech_synthesizer_did_start_speech_utterance
as extern "C" fn(&Object, Sel, *const Object, id) -> (),
);
decl.add_method(
sel!(speechSynthesizer:didFinishSpeechUtterance:),
speech_synthesizer_did_finish_speech_utterance
as extern "C" fn(&Object, Sel, *const Object, id) -> (),
);
decl.add_method(
sel!(speechSynthesizer:didCancelSpeechUtterance:),
speech_synthesizer_did_cancel_speech_utterance
as extern "C" fn(&Object, Sel, *const Object, id) -> (),
);
}

Ok(decl.register())
}

lazy_static! {
static ref NEXT_BACKEND_ID: Mutex<u64> = Mutex::new(0);
static ref DELEGATE_CLASS: &'static Class = make_speech_sythesizer_delegate().unwrap();
}

impl AvFoundation {
pub(crate) fn new() -> Result<Self, Error> {
info!("Initializing AVFoundation backend");

let delegate_class = decl.register();
let delegate_obj: *mut Object = unsafe { msg_send![delegate_class, new] };
let delegate_obj: *mut Object = unsafe { msg_send![*DELEGATE_CLASS, new] };
let mut backend_id = NEXT_BACKEND_ID.lock().unwrap();
let rv = unsafe {
trace!("Creating synth");
Expand Down