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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "base/stl_util-inl.h" | |
6 #include "media/base/callback.h" | |
7 #include "media/base/composite_filter.h" | |
scherkus (not reviewing)
2010/12/15 16:44:02
include corresponding .h first followed by blank l
acolwell GONE FROM CHROMIUM
2010/12/15 18:20:11
Done.
| |
8 | |
9 namespace media { | |
10 | |
11 CompositeFilter::CompositeFilter(MessageLoop* message_loop) | |
12 { | |
scherkus (not reviewing)
2010/12/15 16:44:02
style: { on previous line
acolwell GONE FROM CHROMIUM
2010/12/15 18:20:11
Done.
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13 Init(message_loop, NULL); | |
14 } | |
15 | |
16 CompositeFilter::CompositeFilter(MessageLoop* message_loop, | |
17 ThreadFactoryFunction thread_factory) | |
18 { | |
scherkus (not reviewing)
2010/12/15 16:44:02
style: { on previous line
acolwell GONE FROM CHROMIUM
2010/12/15 18:20:11
Done.
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19 DCHECK(thread_factory); | |
20 Init(message_loop, thread_factory); | |
21 } | |
22 | |
23 void CompositeFilter::Init(MessageLoop* message_loop, | |
24 ThreadFactoryFunction thread_factory) { | |
25 DCHECK(message_loop); | |
26 message_loop_ = message_loop; | |
27 thread_factory_ = thread_factory; | |
28 | |
29 if (!thread_factory_) { | |
30 thread_factory_ = &CompositeFilter::DefaultThreadFactory; | |
31 } | |
32 | |
33 state_ = kCreated; | |
34 sequence_index_ = -1; | |
35 host_ = NULL; | |
36 error_ = PIPELINE_OK; | |
37 } | |
38 | |
39 CompositeFilter::~CompositeFilter() { | |
40 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
41 DCHECK(state_ == kCreated || state_ == kStopped); | |
42 | |
43 // Stop every running filter thread. | |
44 for (FilterThreadVector::iterator iter = filter_threads_.begin(); | |
45 iter != filter_threads_.end(); | |
46 ++iter) { | |
47 (*iter)->Stop(); | |
48 } | |
49 | |
50 // Reset the pipeline, which will decrement a reference to this object. | |
51 // We will get destroyed as soon as the remaining tasks finish executing. | |
52 // To be safe, we'll set our pipeline reference to NULL. | |
53 filters_.clear(); | |
54 STLDeleteElements(&filter_threads_); | |
55 } | |
56 | |
57 bool CompositeFilter::AddFilter(scoped_refptr<Filter> filter) { | |
58 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
59 if (!filter.get() || state_ != kCreated || !host_) | |
60 return false; | |
61 | |
62 // Create a dedicated thread for this filter if applicable. | |
63 if (filter->requires_message_loop()) { | |
64 scoped_ptr<base::Thread> thread( | |
65 thread_factory_(filter->message_loop_name())); | |
66 | |
67 if (!thread.get() || !thread->Start()) { | |
68 return false; | |
69 } | |
70 | |
71 filter->set_message_loop(thread->message_loop()); | |
72 filter_threads_.push_back(thread.release()); | |
73 } | |
74 | |
75 // Register ourselves as the filter's host. | |
76 filter->set_host(this); | |
77 filters_.push_back(make_scoped_refptr(filter.get())); | |
78 return true; | |
79 } | |
80 | |
81 const char* CompositeFilter::major_mime_type() const { | |
82 return ""; | |
83 } | |
84 | |
85 void CompositeFilter::set_host(FilterHost* host) { | |
86 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
87 DCHECK(host); | |
88 DCHECK(!host_); | |
89 host_ = host; | |
90 } | |
91 | |
92 FilterHost* CompositeFilter::host() { | |
93 return host_; | |
94 } | |
95 | |
96 bool CompositeFilter::requires_message_loop() const { | |
97 return false; | |
98 } | |
99 | |
100 const char* CompositeFilter::message_loop_name() const { | |
101 return "CompositeFilter"; | |
102 } | |
103 | |
104 void CompositeFilter::set_message_loop(MessageLoop* message_loop) { | |
105 NOTREACHED() << "Message loop should not be set."; | |
106 } | |
107 | |
108 MessageLoop* CompositeFilter::message_loop() { | |
109 return NULL; | |
110 } | |
111 | |
112 void CompositeFilter::Play(FilterCallback* play_callback) { | |
113 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
114 scoped_ptr<FilterCallback> callback(play_callback); | |
115 if (callback_.get()) { | |
116 SendErrorToHost(PIPELINE_ERROR_OPERATION_PENDING); | |
117 callback->Run(); | |
118 return; | |
119 } else if (state_ == kPlaying) { | |
120 callback->Run(); | |
121 return; | |
122 } else if (!host_ || (state_ != kPaused && state_ != kCreated)) { | |
123 SendErrorToHost(PIPELINE_ERROR_INVALID_STATE); | |
124 callback->Run(); | |
125 return; | |
126 } | |
127 | |
128 ChangeState(kPlayPending); | |
129 callback_.reset(callback.release()); | |
130 StartSerialCallSequence(); | |
131 } | |
132 | |
133 void CompositeFilter::Pause(FilterCallback* pause_callback) { | |
134 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
135 scoped_ptr<FilterCallback> callback(pause_callback); | |
136 if (callback_.get()) { | |
137 SendErrorToHost(PIPELINE_ERROR_OPERATION_PENDING); | |
138 callback->Run(); | |
139 return; | |
140 } else if (state_ == kPaused) { | |
141 callback->Run(); | |
142 return; | |
143 } else if (!host_ || state_ != kPlaying) { | |
144 SendErrorToHost(PIPELINE_ERROR_INVALID_STATE); | |
145 callback->Run(); | |
146 return; | |
147 } | |
148 | |
149 ChangeState(kPausePending); | |
150 callback_.reset(callback.release()); | |
151 StartSerialCallSequence(); | |
152 } | |
153 | |
154 void CompositeFilter::Flush(FilterCallback* flush_callback) { | |
155 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
156 scoped_ptr<FilterCallback> callback(flush_callback); | |
157 if (callback_.get()) { | |
158 SendErrorToHost(PIPELINE_ERROR_OPERATION_PENDING); | |
159 callback->Run(); | |
160 return; | |
161 } else if (!host_ || (state_ != kCreated && state_ != kPaused)) { | |
162 SendErrorToHost(PIPELINE_ERROR_INVALID_STATE); | |
163 callback->Run(); | |
164 return; | |
165 } | |
166 | |
167 ChangeState(kFlushPending); | |
168 callback_.reset(callback.release()); | |
169 StartParallelCallSequence(); | |
170 } | |
171 | |
172 void CompositeFilter::Stop(FilterCallback* stop_callback) { | |
173 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
174 scoped_ptr<FilterCallback> callback(stop_callback); | |
175 if (!host_) { | |
176 SendErrorToHost(PIPELINE_ERROR_INVALID_STATE); | |
177 callback->Run(); | |
178 return; | |
179 } else if (state_ == kStopped) { | |
180 callback->Run(); | |
181 return; | |
182 } | |
183 | |
184 switch(state_) { | |
185 case kError: | |
186 case kCreated: | |
187 case kPaused: | |
188 case kPlaying: | |
189 ChangeState(kStopPending); | |
190 break; | |
191 case kPlayPending: | |
192 ChangeState(kStopWhilePlayPending); | |
193 break; | |
194 case kPausePending: | |
195 ChangeState(kStopWhilePausePending); | |
196 break; | |
197 case kFlushPending: | |
198 ChangeState(kStopWhileFlushPending); | |
199 break; | |
200 case kSeekPending: | |
201 ChangeState(kStopWhileSeekPending); | |
202 break; | |
203 default: | |
204 SendErrorToHost(PIPELINE_ERROR_INVALID_STATE); | |
205 callback->Run(); | |
206 return; | |
207 } | |
208 | |
209 callback_.reset(callback.release()); | |
210 if (state_ == kStopPending) { | |
211 StartSerialCallSequence(); | |
212 } | |
213 } | |
214 | |
215 void CompositeFilter::SetPlaybackRate(float playback_rate) { | |
216 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
217 for (FilterVector::iterator iter = filters_.begin(); | |
218 iter != filters_.end(); | |
219 ++iter) { | |
220 (*iter)->SetPlaybackRate(playback_rate); | |
221 } | |
222 } | |
223 | |
224 void CompositeFilter::Seek(base::TimeDelta time, | |
225 FilterCallback* seek_callback) { | |
226 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
227 scoped_ptr<FilterCallback> callback(seek_callback); | |
228 if (callback_.get()) { | |
229 SendErrorToHost(PIPELINE_ERROR_OPERATION_PENDING); | |
230 callback->Run(); | |
231 return; | |
232 } else if (!host_ || (state_ != kPaused && state_ != kCreated)) { | |
233 SendErrorToHost(PIPELINE_ERROR_INVALID_STATE); | |
234 callback->Run(); | |
235 return; | |
236 } | |
237 | |
238 ChangeState(kSeekPending); | |
239 callback_.reset(callback.release()); | |
240 pending_seek_time_ = time; | |
241 StartSerialCallSequence(); | |
242 } | |
243 | |
244 void CompositeFilter::OnAudioRendererDisabled() { | |
245 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
246 for (FilterVector::iterator iter = filters_.begin(); | |
247 iter != filters_.end(); | |
248 ++iter) { | |
249 (*iter)->OnAudioRendererDisabled(); | |
250 } | |
251 } | |
252 | |
253 base::Thread* CompositeFilter::DefaultThreadFactory( | |
254 const char* thread_name) { | |
255 return new base::Thread(thread_name); | |
256 } | |
257 | |
258 void CompositeFilter::ChangeState(State new_state) { | |
259 state_ = new_state; | |
260 } | |
261 | |
262 void CompositeFilter::StartSerialCallSequence() { | |
263 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
264 error_ = PIPELINE_OK; | |
265 | |
266 if (filters_.size() > 0) { | |
267 sequence_index_ = 0; | |
268 CallFilter(filters_[sequence_index_], | |
269 NewThreadSafeCallback(&CompositeFilter::SerialCallback)); | |
270 } else { | |
271 sequence_index_ = -1; | |
272 SerialCallback(); | |
273 } | |
274 } | |
275 | |
276 void CompositeFilter::StartParallelCallSequence() { | |
277 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
278 error_ = PIPELINE_OK; | |
279 | |
280 if (filters_.size() > 0) { | |
281 sequence_index_ = 0; | |
282 for (size_t i = 0; i < filters_.size(); i++) | |
283 CallFilter(filters_[i], | |
scherkus (not reviewing)
2010/12/15 16:44:02
I get freaked out when I see multi-line for/while
acolwell GONE FROM CHROMIUM
2010/12/15 18:20:11
Done.
| |
284 NewThreadSafeCallback(&CompositeFilter::ParallelCallback)); | |
285 } else { | |
286 sequence_index_ = -1; | |
287 ParallelCallback(); | |
288 } | |
289 } | |
290 | |
291 void CompositeFilter::CallFilter(scoped_refptr<Filter>& filter, | |
292 FilterCallback* callback) { | |
293 switch(state_) { | |
294 case kPlayPending: | |
295 filter->Play(callback); | |
296 break; | |
297 case kPausePending: | |
298 filter->Pause(callback); | |
299 break; | |
300 case kFlushPending: | |
301 filter->Flush(callback); | |
302 break; | |
303 case kStopPending: | |
304 filter->Stop(callback); | |
305 break; | |
306 case kSeekPending: | |
307 filter->Seek(pending_seek_time_, callback); | |
308 break; | |
309 default: | |
310 delete callback; | |
311 ChangeState(kError); | |
312 HandleError(PIPELINE_ERROR_INVALID_STATE); | |
313 } | |
314 } | |
315 | |
316 void CompositeFilter::DispatchPendingCallback() { | |
317 if (callback_.get()) { | |
318 scoped_ptr<FilterCallback> callback(callback_.release()); | |
319 callback->Run(); | |
320 } | |
321 } | |
322 | |
323 CompositeFilter::State CompositeFilter::GetNextState(State state) const { | |
324 State ret = kInvalid; | |
325 switch (state) { | |
326 case kPlayPending: | |
327 ret = kPlaying; | |
328 break; | |
329 case kPausePending: | |
330 ret = kPaused; | |
331 case kFlushPending: | |
332 ret = kPaused; | |
333 break; | |
334 case kStopPending: | |
335 ret = kStopped; | |
336 break; | |
337 case kSeekPending: | |
338 ret = kPaused; | |
339 break; | |
340 case kStopWhilePlayPending: | |
341 case kStopWhilePausePending: | |
342 case kStopWhileFlushPending: | |
343 case kStopWhileSeekPending: | |
344 ret = kStopPending; | |
345 break; | |
346 | |
347 case kInvalid: | |
348 case kCreated: | |
349 case kPlaying: | |
350 case kPaused: | |
351 case kStopped: | |
352 case kError: | |
353 ret = kInvalid; | |
354 break; | |
355 | |
356 // default: intentionally left out to catch missing states. | |
357 } | |
358 | |
359 return ret; | |
360 } | |
361 | |
362 void CompositeFilter::SerialCallback() { | |
363 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
364 if (error_ != PIPELINE_OK) { | |
365 // We encountered an error. Terminate the sequence now. | |
366 ChangeState(kError); | |
367 HandleError(error_); | |
368 return; | |
369 } | |
370 | |
371 sequence_index_++; | |
372 if (sequence_index_ == filters_.size()) { | |
373 // All filters have been successfully called without error. | |
374 OnCallSequenceDone(); | |
375 } else if (GetNextState(state_) == kStopPending) { | |
376 // Abort sequence early and start issuing Stop() calls. | |
377 ChangeState(kStopPending); | |
378 StartSerialCallSequence(); | |
379 } else { | |
380 // We aren't done with the sequence. Call the next filter. | |
381 CallFilter(filters_[sequence_index_], | |
382 NewThreadSafeCallback(&CompositeFilter::SerialCallback)); | |
383 } | |
384 } | |
385 | |
386 void CompositeFilter::ParallelCallback() { | |
387 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
388 sequence_index_++; | |
389 if (sequence_index_ == filters_.size()) { | |
390 if (error_ != PIPELINE_OK) { | |
391 // We encountered an error. | |
392 ChangeState(kError); | |
393 HandleError(error_); | |
394 return; | |
395 } | |
396 | |
397 OnCallSequenceDone(); | |
398 } | |
399 } | |
400 | |
401 void CompositeFilter::OnCallSequenceDone() { | |
402 State next_state = GetNextState(state_); | |
403 | |
404 if (next_state == kInvalid) { | |
405 // We somehow got into an unexpected state. | |
406 ChangeState(kError); | |
407 HandleError(PIPELINE_ERROR_INVALID_STATE); | |
408 } | |
409 | |
410 ChangeState(next_state); | |
411 | |
412 if (state_ == kStopPending) { | |
413 // Handle a deferred Stop(). | |
414 StartSerialCallSequence(); | |
415 } else { | |
416 // Call the callback to indicate that the operation has completed. | |
417 DispatchPendingCallback(); | |
418 } | |
419 } | |
420 | |
421 void CompositeFilter::SendErrorToHost(PipelineError error) { | |
422 if (host_) | |
423 host_->SetError(error); | |
424 } | |
425 | |
426 void CompositeFilter::HandleError(PipelineError error) { | |
427 if (error != PIPELINE_OK) { | |
428 SendErrorToHost(error); | |
429 } | |
430 | |
431 DispatchPendingCallback(); | |
432 } | |
433 | |
434 FilterCallback* CompositeFilter::NewThreadSafeCallback( | |
435 void (CompositeFilter::*method)()) { | |
scherkus (not reviewing)
2010/12/15 16:44:02
de-indent by 2
acolwell GONE FROM CHROMIUM
2010/12/15 18:20:11
Done.
| |
436 return TaskToCallbackAdapter::NewCallback( | |
437 NewRunnableMethod(this, | |
438 &CompositeFilter::OnCallback, | |
439 message_loop_, | |
440 method)); | |
441 } | |
442 | |
443 void CompositeFilter::OnCallback(MessageLoop* message_loop, | |
444 void (CompositeFilter::*method)()) { | |
445 if (MessageLoop::current() != message_loop) { | |
446 // Posting callback to the proper thread. | |
447 message_loop->PostTask(FROM_HERE, NewRunnableMethod(this, method)); | |
448 return; | |
449 } | |
450 | |
451 (this->*method)(); | |
452 } | |
453 | |
454 bool CompositeFilter::CanForwardError() { | |
455 return (state_ == kCreated) || (state_ == kPlaying) || (state_ == kPaused); | |
456 } | |
457 | |
458 // media::FilterHost methods. | |
459 void CompositeFilter::SetError(PipelineError error) { | |
460 if (message_loop_ != MessageLoop::current()) { | |
461 message_loop_->PostTask(FROM_HERE, | |
462 NewRunnableMethod(this, &CompositeFilter::SetError, error)); | |
463 return; | |
464 } | |
465 | |
466 DCHECK_EQ(message_loop_, MessageLoop::current()); | |
467 DCHECK(host_); | |
468 | |
469 // Drop errors recieved while stopping or stopped. | |
470 // This shields the owner of this object from having | |
471 // to deal with errors it can't do anything about. | |
472 if (state_ == kStopPending || state_ == kStopped) | |
473 return; | |
474 | |
475 error_ = error; | |
476 if (host_ && CanForwardError()) | |
477 host_->SetError(error); | |
478 } | |
479 | |
480 base::TimeDelta CompositeFilter::GetTime() const { | |
481 DCHECK(host_); | |
482 return host_ ? host_->GetTime() : base::TimeDelta(); | |
483 } | |
484 | |
485 base::TimeDelta CompositeFilter::GetDuration() const { | |
486 DCHECK(host_); | |
487 return host_ ? host_->GetDuration() : base::TimeDelta(); | |
488 } | |
489 | |
490 void CompositeFilter::SetTime(base::TimeDelta time) { | |
491 DCHECK(host_); | |
scherkus (not reviewing)
2010/12/15 16:44:02
I'd enforce a guarantee that host_ must be present
acolwell GONE FROM CHROMIUM
2010/12/15 18:20:11
Once I move the FilterHost impl to an inner class
scherkus (not reviewing)
2010/12/15 18:57:44
Sounds good!
| |
492 if (host_) | |
493 host_->SetTime(time); | |
494 } | |
495 | |
496 void CompositeFilter::SetDuration(base::TimeDelta duration) { | |
497 DCHECK(host_); | |
498 if (host_) | |
499 host_->SetDuration(duration); | |
500 } | |
501 | |
502 void CompositeFilter::SetBufferedTime(base::TimeDelta buffered_time) { | |
503 DCHECK(host_); | |
504 if (host_) | |
505 host_->SetBufferedTime(buffered_time); | |
506 } | |
507 | |
508 void CompositeFilter::SetTotalBytes(int64 total_bytes) { | |
509 DCHECK(host_); | |
510 if (host_) | |
511 host_->SetTotalBytes(total_bytes); | |
512 } | |
513 | |
514 void CompositeFilter::SetBufferedBytes(int64 buffered_bytes) { | |
515 DCHECK(host_); | |
516 if (host_) | |
517 host_->SetBufferedBytes(buffered_bytes); | |
518 } | |
519 | |
520 void CompositeFilter::SetVideoSize(size_t width, size_t height) { | |
521 DCHECK(host_); | |
522 if (host_) | |
523 host_->SetVideoSize(width, height); | |
524 } | |
525 | |
526 void CompositeFilter::SetStreaming(bool streaming) { | |
527 DCHECK(host_); | |
528 if (host_) | |
529 host_->SetStreaming(streaming); | |
530 } | |
531 | |
532 void CompositeFilter::NotifyEnded() { | |
533 DCHECK(host_); | |
534 if (host_) | |
535 host_->NotifyEnded(); | |
536 } | |
537 | |
538 void CompositeFilter::SetLoaded(bool loaded) { | |
539 DCHECK(host_); | |
540 if (host_) | |
541 host_->SetLoaded(loaded); | |
542 } | |
543 | |
544 void CompositeFilter::SetNetworkActivity(bool network_activity) { | |
545 DCHECK(host_); | |
546 if (host_) | |
547 host_->SetNetworkActivity(network_activity); | |
548 } | |
549 | |
550 void CompositeFilter::DisableAudioRenderer() { | |
551 DCHECK(host_); | |
552 if (host_) | |
553 host_->DisableAudioRenderer(); | |
554 } | |
555 | |
556 void CompositeFilter::SetCurrentReadPosition(int64 offset) { | |
557 DCHECK(host_); | |
558 if (host_) | |
559 host_->SetCurrentReadPosition(offset); | |
560 } | |
561 | |
562 int64 CompositeFilter::GetCurrentReadPosition() { | |
563 DCHECK(host_); | |
564 return host_ ? host_->GetCurrentReadPosition() : 0; | |
565 } | |
566 | |
567 } // namespace media | |
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