gstreamer_audio/subclass/
audio_encoder.rs

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1// Take a look at the license at the top of the repository in the LICENSE file.
2
3use std::ptr;
4
5use glib::translate::*;
6use gst::subclass::prelude::*;
7
8use crate::{ffi, prelude::*, AudioEncoder, AudioInfo};
9
10pub trait AudioEncoderImpl: AudioEncoderImplExt + ElementImpl {
11    /// Optional.
12    ///  Called when the element changes to GST_STATE_READY.
13    ///  Allows opening external resources.
14    fn open(&self) -> Result<(), gst::ErrorMessage> {
15        self.parent_open()
16    }
17
18    /// Optional.
19    ///  Called when the element changes to GST_STATE_NULL.
20    ///  Allows closing external resources.
21    fn close(&self) -> Result<(), gst::ErrorMessage> {
22        self.parent_close()
23    }
24
25    /// Optional.
26    ///  Called when the element starts processing.
27    ///  Allows opening external resources.
28    fn start(&self) -> Result<(), gst::ErrorMessage> {
29        self.parent_start()
30    }
31
32    /// Optional.
33    ///  Called when the element stops processing.
34    ///  Allows closing external resources.
35    fn stop(&self) -> Result<(), gst::ErrorMessage> {
36        self.parent_stop()
37    }
38
39    /// Notifies subclass of incoming data format.
40    ///  GstAudioInfo contains the format according to provided caps.
41    fn set_format(&self, info: &AudioInfo) -> Result<(), gst::LoggableError> {
42        self.parent_set_format(info)
43    }
44
45    /// Provides input samples (or NULL to clear any remaining data)
46    ///  according to directions as configured by the subclass
47    ///  using the API. Input data ref management is performed
48    ///  by base class, subclass should not care or intervene,
49    ///  and input data is only valid until next call to base class,
50    ///  most notably a call to [`AudioEncoderExt::finish_frame()`][crate::prelude::AudioEncoderExt::finish_frame()].
51    fn handle_frame(
52        &self,
53        buffer: Option<&gst::Buffer>,
54    ) -> Result<gst::FlowSuccess, gst::FlowError> {
55        self.parent_handle_frame(buffer)
56    }
57
58    /// Optional.
59    ///  Called just prior to pushing (encoded data) buffer downstream.
60    ///  Subclass has full discretionary access to buffer,
61    ///  and a not OK flow return will abort downstream pushing.
62    fn pre_push(&self, buffer: gst::Buffer) -> Result<Option<gst::Buffer>, gst::FlowError> {
63        self.parent_pre_push(buffer)
64    }
65
66    /// Optional.
67    ///  Instructs subclass to clear any codec caches and discard
68    ///  any pending samples and not yet returned encoded data.
69    fn flush(&self) {
70        self.parent_flush()
71    }
72
73    /// Negotiate with downstream elements to currently configured [`gst::Caps`][crate::gst::Caps].
74    /// Unmark GST_PAD_FLAG_NEED_RECONFIGURE in any case. But mark it again if
75    /// negotiate fails.
76    ///
77    /// # Returns
78    ///
79    /// [`true`] if the negotiation succeeded, else [`false`].
80    fn negotiate(&self) -> Result<(), gst::LoggableError> {
81        self.parent_negotiate()
82    }
83
84    fn caps(&self, filter: Option<&gst::Caps>) -> gst::Caps {
85        self.parent_caps(filter)
86    }
87
88    /// Optional.
89    ///  Event handler on the sink pad. Subclasses should chain up to
90    ///  the parent implementation to invoke the default handler.
91    fn sink_event(&self, event: gst::Event) -> bool {
92        self.parent_sink_event(event)
93    }
94
95    /// Optional.
96    ///  Query handler on the sink pad. This function should
97    ///  return TRUE if the query could be performed. Subclasses
98    ///  should chain up to the parent implementation to invoke the
99    ///  default handler. Since: 1.6
100    fn sink_query(&self, query: &mut gst::QueryRef) -> bool {
101        self.parent_sink_query(query)
102    }
103
104    /// Optional.
105    ///  Event handler on the src pad. Subclasses should chain up to
106    ///  the parent implementation to invoke the default handler.
107    fn src_event(&self, event: gst::Event) -> bool {
108        self.parent_src_event(event)
109    }
110
111    /// Optional.
112    ///  Query handler on the source pad. This function should
113    ///  return TRUE if the query could be performed. Subclasses
114    ///  should chain up to the parent implementation to invoke the
115    ///  default handler. Since: 1.6
116    fn src_query(&self, query: &mut gst::QueryRef) -> bool {
117        self.parent_src_query(query)
118    }
119
120    /// Optional.
121    ///  Propose buffer allocation parameters for upstream elements.
122    ///  Subclasses should chain up to the parent implementation to
123    ///  invoke the default handler.
124    fn propose_allocation(
125        &self,
126        query: &mut gst::query::Allocation,
127    ) -> Result<(), gst::LoggableError> {
128        self.parent_propose_allocation(query)
129    }
130
131    /// Optional.
132    ///  Setup the allocation parameters for allocating output
133    ///  buffers. The passed in query contains the result of the
134    ///  downstream allocation query.
135    ///  Subclasses should chain up to the parent implementation to
136    ///  invoke the default handler.
137    fn decide_allocation(
138        &self,
139        query: &mut gst::query::Allocation,
140    ) -> Result<(), gst::LoggableError> {
141        self.parent_decide_allocation(query)
142    }
143}
144
145mod sealed {
146    pub trait Sealed {}
147    impl<T: super::AudioEncoderImplExt> Sealed for T {}
148}
149
150pub trait AudioEncoderImplExt: sealed::Sealed + ObjectSubclass {
151    fn parent_open(&self) -> Result<(), gst::ErrorMessage> {
152        unsafe {
153            let data = Self::type_data();
154            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
155            (*parent_class)
156                .open
157                .map(|f| {
158                    if from_glib(f(self
159                        .obj()
160                        .unsafe_cast_ref::<AudioEncoder>()
161                        .to_glib_none()
162                        .0))
163                    {
164                        Ok(())
165                    } else {
166                        Err(gst::error_msg!(
167                            gst::CoreError::StateChange,
168                            ["Parent function `open` failed"]
169                        ))
170                    }
171                })
172                .unwrap_or(Ok(()))
173        }
174    }
175
176    fn parent_close(&self) -> Result<(), gst::ErrorMessage> {
177        unsafe {
178            let data = Self::type_data();
179            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
180            (*parent_class)
181                .close
182                .map(|f| {
183                    if from_glib(f(self
184                        .obj()
185                        .unsafe_cast_ref::<AudioEncoder>()
186                        .to_glib_none()
187                        .0))
188                    {
189                        Ok(())
190                    } else {
191                        Err(gst::error_msg!(
192                            gst::CoreError::StateChange,
193                            ["Parent function `close` failed"]
194                        ))
195                    }
196                })
197                .unwrap_or(Ok(()))
198        }
199    }
200
201    fn parent_start(&self) -> Result<(), gst::ErrorMessage> {
202        unsafe {
203            let data = Self::type_data();
204            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
205            (*parent_class)
206                .start
207                .map(|f| {
208                    if from_glib(f(self
209                        .obj()
210                        .unsafe_cast_ref::<AudioEncoder>()
211                        .to_glib_none()
212                        .0))
213                    {
214                        Ok(())
215                    } else {
216                        Err(gst::error_msg!(
217                            gst::CoreError::StateChange,
218                            ["Parent function `start` failed"]
219                        ))
220                    }
221                })
222                .unwrap_or(Ok(()))
223        }
224    }
225
226    fn parent_stop(&self) -> Result<(), gst::ErrorMessage> {
227        unsafe {
228            let data = Self::type_data();
229            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
230            (*parent_class)
231                .stop
232                .map(|f| {
233                    if from_glib(f(self
234                        .obj()
235                        .unsafe_cast_ref::<AudioEncoder>()
236                        .to_glib_none()
237                        .0))
238                    {
239                        Ok(())
240                    } else {
241                        Err(gst::error_msg!(
242                            gst::CoreError::StateChange,
243                            ["Parent function `stop` failed"]
244                        ))
245                    }
246                })
247                .unwrap_or(Ok(()))
248        }
249    }
250
251    fn parent_set_format(&self, info: &AudioInfo) -> Result<(), gst::LoggableError> {
252        unsafe {
253            let data = Self::type_data();
254            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
255            (*parent_class)
256                .set_format
257                .map(|f| {
258                    gst::result_from_gboolean!(
259                        f(
260                            self.obj()
261                                .unsafe_cast_ref::<AudioEncoder>()
262                                .to_glib_none()
263                                .0,
264                            info.to_glib_none().0 as *mut _
265                        ),
266                        gst::CAT_RUST,
267                        "parent function `set_format` failed"
268                    )
269                })
270                .unwrap_or(Ok(()))
271        }
272    }
273
274    fn parent_handle_frame(
275        &self,
276        buffer: Option<&gst::Buffer>,
277    ) -> Result<gst::FlowSuccess, gst::FlowError> {
278        unsafe {
279            let data = Self::type_data();
280            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
281            (*parent_class)
282                .handle_frame
283                .map(|f| {
284                    try_from_glib(f(
285                        self.obj()
286                            .unsafe_cast_ref::<AudioEncoder>()
287                            .to_glib_none()
288                            .0,
289                        buffer
290                            .map(|buffer| buffer.as_mut_ptr() as *mut *mut gst::ffi::GstBuffer)
291                            .unwrap_or(ptr::null_mut()),
292                    ))
293                })
294                .unwrap_or(Err(gst::FlowError::Error))
295        }
296    }
297
298    fn parent_pre_push(&self, buffer: gst::Buffer) -> Result<Option<gst::Buffer>, gst::FlowError> {
299        unsafe {
300            let data = Self::type_data();
301            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
302            if let Some(f) = (*parent_class).pre_push {
303                let mut buffer = buffer.into_glib_ptr();
304                gst::FlowSuccess::try_from_glib(f(
305                    self.obj()
306                        .unsafe_cast_ref::<AudioEncoder>()
307                        .to_glib_none()
308                        .0,
309                    &mut buffer,
310                ))
311                .map(|_| from_glib_full(buffer))
312            } else {
313                Ok(Some(buffer))
314            }
315        }
316    }
317
318    fn parent_flush(&self) {
319        unsafe {
320            let data = Self::type_data();
321            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
322            (*parent_class)
323                .flush
324                .map(|f| {
325                    f(self
326                        .obj()
327                        .unsafe_cast_ref::<AudioEncoder>()
328                        .to_glib_none()
329                        .0)
330                })
331                .unwrap_or(())
332        }
333    }
334
335    fn parent_negotiate(&self) -> Result<(), gst::LoggableError> {
336        unsafe {
337            let data = Self::type_data();
338            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
339            (*parent_class)
340                .negotiate
341                .map(|f| {
342                    gst::result_from_gboolean!(
343                        f(self
344                            .obj()
345                            .unsafe_cast_ref::<AudioEncoder>()
346                            .to_glib_none()
347                            .0),
348                        gst::CAT_RUST,
349                        "Parent function `negotiate` failed"
350                    )
351                })
352                .unwrap_or(Ok(()))
353        }
354    }
355
356    fn parent_caps(&self, filter: Option<&gst::Caps>) -> gst::Caps {
357        unsafe {
358            let data = Self::type_data();
359            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
360            (*parent_class)
361                .getcaps
362                .map(|f| {
363                    from_glib_full(f(
364                        self.obj()
365                            .unsafe_cast_ref::<AudioEncoder>()
366                            .to_glib_none()
367                            .0,
368                        filter.to_glib_none().0,
369                    ))
370                })
371                .unwrap_or_else(|| {
372                    self.obj()
373                        .unsafe_cast_ref::<AudioEncoder>()
374                        .proxy_getcaps(None, filter)
375                })
376        }
377    }
378
379    fn parent_sink_event(&self, event: gst::Event) -> bool {
380        unsafe {
381            let data = Self::type_data();
382            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
383            let f = (*parent_class)
384                .sink_event
385                .expect("Missing parent function `sink_event`");
386            from_glib(f(
387                self.obj()
388                    .unsafe_cast_ref::<AudioEncoder>()
389                    .to_glib_none()
390                    .0,
391                event.into_glib_ptr(),
392            ))
393        }
394    }
395
396    fn parent_sink_query(&self, query: &mut gst::QueryRef) -> bool {
397        unsafe {
398            let data = Self::type_data();
399            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
400            let f = (*parent_class)
401                .sink_query
402                .expect("Missing parent function `sink_query`");
403            from_glib(f(
404                self.obj()
405                    .unsafe_cast_ref::<AudioEncoder>()
406                    .to_glib_none()
407                    .0,
408                query.as_mut_ptr(),
409            ))
410        }
411    }
412
413    fn parent_src_event(&self, event: gst::Event) -> bool {
414        unsafe {
415            let data = Self::type_data();
416            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
417            let f = (*parent_class)
418                .src_event
419                .expect("Missing parent function `src_event`");
420            from_glib(f(
421                self.obj()
422                    .unsafe_cast_ref::<AudioEncoder>()
423                    .to_glib_none()
424                    .0,
425                event.into_glib_ptr(),
426            ))
427        }
428    }
429
430    fn parent_src_query(&self, query: &mut gst::QueryRef) -> bool {
431        unsafe {
432            let data = Self::type_data();
433            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
434            let f = (*parent_class)
435                .src_query
436                .expect("Missing parent function `src_query`");
437            from_glib(f(
438                self.obj()
439                    .unsafe_cast_ref::<AudioEncoder>()
440                    .to_glib_none()
441                    .0,
442                query.as_mut_ptr(),
443            ))
444        }
445    }
446
447    fn parent_propose_allocation(
448        &self,
449        query: &mut gst::query::Allocation,
450    ) -> Result<(), gst::LoggableError> {
451        unsafe {
452            let data = Self::type_data();
453            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
454            (*parent_class)
455                .propose_allocation
456                .map(|f| {
457                    gst::result_from_gboolean!(
458                        f(
459                            self.obj()
460                                .unsafe_cast_ref::<AudioEncoder>()
461                                .to_glib_none()
462                                .0,
463                            query.as_mut_ptr(),
464                        ),
465                        gst::CAT_RUST,
466                        "Parent function `propose_allocation` failed",
467                    )
468                })
469                .unwrap_or(Ok(()))
470        }
471    }
472
473    fn parent_decide_allocation(
474        &self,
475        query: &mut gst::query::Allocation,
476    ) -> Result<(), gst::LoggableError> {
477        unsafe {
478            let data = Self::type_data();
479            let parent_class = data.as_ref().parent_class() as *mut ffi::GstAudioEncoderClass;
480            (*parent_class)
481                .decide_allocation
482                .map(|f| {
483                    gst::result_from_gboolean!(
484                        f(
485                            self.obj()
486                                .unsafe_cast_ref::<AudioEncoder>()
487                                .to_glib_none()
488                                .0,
489                            query.as_mut_ptr(),
490                        ),
491                        gst::CAT_RUST,
492                        "Parent function `decide_allocation` failed",
493                    )
494                })
495                .unwrap_or(Ok(()))
496        }
497    }
498}
499
500impl<T: AudioEncoderImpl> AudioEncoderImplExt for T {}
501
502unsafe impl<T: AudioEncoderImpl> IsSubclassable<T> for AudioEncoder {
503    fn class_init(klass: &mut glib::Class<Self>) {
504        Self::parent_class_init::<T>(klass);
505        let klass = klass.as_mut();
506        klass.open = Some(audio_encoder_open::<T>);
507        klass.close = Some(audio_encoder_close::<T>);
508        klass.start = Some(audio_encoder_start::<T>);
509        klass.stop = Some(audio_encoder_stop::<T>);
510        klass.set_format = Some(audio_encoder_set_format::<T>);
511        klass.handle_frame = Some(audio_encoder_handle_frame::<T>);
512        klass.pre_push = Some(audio_encoder_pre_push::<T>);
513        klass.flush = Some(audio_encoder_flush::<T>);
514        klass.negotiate = Some(audio_encoder_negotiate::<T>);
515        klass.getcaps = Some(audio_encoder_getcaps::<T>);
516        klass.sink_event = Some(audio_encoder_sink_event::<T>);
517        klass.src_event = Some(audio_encoder_src_event::<T>);
518        klass.sink_query = Some(audio_encoder_sink_query::<T>);
519        klass.src_query = Some(audio_encoder_src_query::<T>);
520        klass.propose_allocation = Some(audio_encoder_propose_allocation::<T>);
521        klass.decide_allocation = Some(audio_encoder_decide_allocation::<T>);
522    }
523}
524
525unsafe extern "C" fn audio_encoder_open<T: AudioEncoderImpl>(
526    ptr: *mut ffi::GstAudioEncoder,
527) -> glib::ffi::gboolean {
528    let instance = &*(ptr as *mut T::Instance);
529    let imp = instance.imp();
530
531    gst::panic_to_error!(imp, false, {
532        match imp.open() {
533            Ok(()) => true,
534            Err(err) => {
535                imp.post_error_message(err);
536                false
537            }
538        }
539    })
540    .into_glib()
541}
542
543unsafe extern "C" fn audio_encoder_close<T: AudioEncoderImpl>(
544    ptr: *mut ffi::GstAudioEncoder,
545) -> glib::ffi::gboolean {
546    let instance = &*(ptr as *mut T::Instance);
547    let imp = instance.imp();
548
549    gst::panic_to_error!(imp, false, {
550        match imp.close() {
551            Ok(()) => true,
552            Err(err) => {
553                imp.post_error_message(err);
554                false
555            }
556        }
557    })
558    .into_glib()
559}
560
561unsafe extern "C" fn audio_encoder_start<T: AudioEncoderImpl>(
562    ptr: *mut ffi::GstAudioEncoder,
563) -> glib::ffi::gboolean {
564    let instance = &*(ptr as *mut T::Instance);
565    let imp = instance.imp();
566
567    gst::panic_to_error!(imp, false, {
568        match imp.start() {
569            Ok(()) => true,
570            Err(err) => {
571                imp.post_error_message(err);
572                false
573            }
574        }
575    })
576    .into_glib()
577}
578
579unsafe extern "C" fn audio_encoder_stop<T: AudioEncoderImpl>(
580    ptr: *mut ffi::GstAudioEncoder,
581) -> glib::ffi::gboolean {
582    let instance = &*(ptr as *mut T::Instance);
583    let imp = instance.imp();
584
585    gst::panic_to_error!(imp, false, {
586        match imp.stop() {
587            Ok(()) => true,
588            Err(err) => {
589                imp.post_error_message(err);
590                false
591            }
592        }
593    })
594    .into_glib()
595}
596
597unsafe extern "C" fn audio_encoder_set_format<T: AudioEncoderImpl>(
598    ptr: *mut ffi::GstAudioEncoder,
599    info: *mut ffi::GstAudioInfo,
600) -> glib::ffi::gboolean {
601    let instance = &*(ptr as *mut T::Instance);
602    let imp = instance.imp();
603
604    gst::panic_to_error!(imp, false, {
605        match imp.set_format(&from_glib_none(info)) {
606            Ok(()) => true,
607            Err(err) => {
608                err.log_with_imp(imp);
609                false
610            }
611        }
612    })
613    .into_glib()
614}
615
616unsafe extern "C" fn audio_encoder_handle_frame<T: AudioEncoderImpl>(
617    ptr: *mut ffi::GstAudioEncoder,
618    buffer: *mut *mut gst::ffi::GstBuffer,
619) -> gst::ffi::GstFlowReturn {
620    // FIXME: Misgenerated in gstreamer-audio-sys
621    let buffer = buffer as *mut gst::ffi::GstBuffer;
622    let instance = &*(ptr as *mut T::Instance);
623    let imp = instance.imp();
624
625    gst::panic_to_error!(imp, gst::FlowReturn::Error, {
626        imp.handle_frame(Option::<gst::Buffer>::from_glib_none(buffer).as_ref())
627            .into()
628    })
629    .into_glib()
630}
631
632unsafe extern "C" fn audio_encoder_pre_push<T: AudioEncoderImpl>(
633    ptr: *mut ffi::GstAudioEncoder,
634    buffer: *mut *mut gst::ffi::GstBuffer,
635) -> gst::ffi::GstFlowReturn {
636    let instance = &*(ptr as *mut T::Instance);
637    let imp = instance.imp();
638
639    gst::panic_to_error!(imp, gst::FlowReturn::Error, {
640        match imp.pre_push(from_glib_full(*buffer)) {
641            Ok(Some(new_buffer)) => {
642                *buffer = new_buffer.into_glib_ptr();
643                Ok(gst::FlowSuccess::Ok)
644            }
645            Ok(None) => {
646                *buffer = ptr::null_mut();
647                Ok(gst::FlowSuccess::Ok)
648            }
649            Err(err) => Err(err),
650        }
651        .into()
652    })
653    .into_glib()
654}
655
656unsafe extern "C" fn audio_encoder_flush<T: AudioEncoderImpl>(ptr: *mut ffi::GstAudioEncoder) {
657    let instance = &*(ptr as *mut T::Instance);
658    let imp = instance.imp();
659
660    gst::panic_to_error!(imp, (), { AudioEncoderImpl::flush(imp,) })
661}
662
663unsafe extern "C" fn audio_encoder_negotiate<T: AudioEncoderImpl>(
664    ptr: *mut ffi::GstAudioEncoder,
665) -> glib::ffi::gboolean {
666    let instance = &*(ptr as *mut T::Instance);
667    let imp = instance.imp();
668
669    gst::panic_to_error!(imp, false, {
670        match imp.negotiate() {
671            Ok(()) => true,
672            Err(err) => {
673                err.log_with_imp(imp);
674                false
675            }
676        }
677    })
678    .into_glib()
679}
680
681unsafe extern "C" fn audio_encoder_getcaps<T: AudioEncoderImpl>(
682    ptr: *mut ffi::GstAudioEncoder,
683    filter: *mut gst::ffi::GstCaps,
684) -> *mut gst::ffi::GstCaps {
685    let instance = &*(ptr as *mut T::Instance);
686    let imp = instance.imp();
687
688    gst::panic_to_error!(imp, gst::Caps::new_empty(), {
689        AudioEncoderImpl::caps(
690            imp,
691            Option::<gst::Caps>::from_glib_borrow(filter)
692                .as_ref()
693                .as_ref(),
694        )
695    })
696    .into_glib_ptr()
697}
698
699unsafe extern "C" fn audio_encoder_sink_event<T: AudioEncoderImpl>(
700    ptr: *mut ffi::GstAudioEncoder,
701    event: *mut gst::ffi::GstEvent,
702) -> glib::ffi::gboolean {
703    let instance = &*(ptr as *mut T::Instance);
704    let imp = instance.imp();
705
706    gst::panic_to_error!(imp, false, { imp.sink_event(from_glib_full(event)) }).into_glib()
707}
708
709unsafe extern "C" fn audio_encoder_sink_query<T: AudioEncoderImpl>(
710    ptr: *mut ffi::GstAudioEncoder,
711    query: *mut gst::ffi::GstQuery,
712) -> glib::ffi::gboolean {
713    let instance = &*(ptr as *mut T::Instance);
714    let imp = instance.imp();
715
716    gst::panic_to_error!(imp, false, {
717        imp.sink_query(gst::QueryRef::from_mut_ptr(query))
718    })
719    .into_glib()
720}
721
722unsafe extern "C" fn audio_encoder_src_event<T: AudioEncoderImpl>(
723    ptr: *mut ffi::GstAudioEncoder,
724    event: *mut gst::ffi::GstEvent,
725) -> glib::ffi::gboolean {
726    let instance = &*(ptr as *mut T::Instance);
727    let imp = instance.imp();
728
729    gst::panic_to_error!(imp, false, { imp.src_event(from_glib_full(event)) }).into_glib()
730}
731
732unsafe extern "C" fn audio_encoder_src_query<T: AudioEncoderImpl>(
733    ptr: *mut ffi::GstAudioEncoder,
734    query: *mut gst::ffi::GstQuery,
735) -> glib::ffi::gboolean {
736    let instance = &*(ptr as *mut T::Instance);
737    let imp = instance.imp();
738
739    gst::panic_to_error!(imp, false, {
740        imp.src_query(gst::QueryRef::from_mut_ptr(query))
741    })
742    .into_glib()
743}
744
745unsafe extern "C" fn audio_encoder_propose_allocation<T: AudioEncoderImpl>(
746    ptr: *mut ffi::GstAudioEncoder,
747    query: *mut gst::ffi::GstQuery,
748) -> glib::ffi::gboolean {
749    let instance = &*(ptr as *mut T::Instance);
750    let imp = instance.imp();
751    let query = match gst::QueryRef::from_mut_ptr(query).view_mut() {
752        gst::QueryViewMut::Allocation(allocation) => allocation,
753        _ => unreachable!(),
754    };
755
756    gst::panic_to_error!(imp, false, {
757        match imp.propose_allocation(query) {
758            Ok(()) => true,
759            Err(err) => {
760                err.log_with_imp(imp);
761                false
762            }
763        }
764    })
765    .into_glib()
766}
767
768unsafe extern "C" fn audio_encoder_decide_allocation<T: AudioEncoderImpl>(
769    ptr: *mut ffi::GstAudioEncoder,
770    query: *mut gst::ffi::GstQuery,
771) -> glib::ffi::gboolean {
772    let instance = &*(ptr as *mut T::Instance);
773    let imp = instance.imp();
774    let query = match gst::QueryRef::from_mut_ptr(query).view_mut() {
775        gst::QueryViewMut::Allocation(allocation) => allocation,
776        _ => unreachable!(),
777    };
778
779    gst::panic_to_error!(imp, false, {
780        match imp.decide_allocation(query) {
781            Ok(()) => true,
782            Err(err) => {
783                err.log_with_imp(imp);
784                false
785            }
786        }
787    })
788    .into_glib()
789}
gstreamer_audio/subclass/audio_encoder.rs

gstreamer_audio/subclass/
audio_encoder.rs
