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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "media/cast/audio_receiver/audio_decoder.h" | 5 #include "media/cast/audio_receiver/audio_decoder.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/bind_helpers.h" | 8 #include "base/bind_helpers.h" |
9 #include "base/location.h" | 9 #include "base/location.h" |
10 #include "base/logging.h" | 10 #include "base/logging.h" |
11 #include "base/memory/ref_counted.h" | 11 #include "base/memory/ref_counted.h" |
12 #include "base/stl_util.h" | |
13 #include "base/sys_byteorder.h" | 12 #include "base/sys_byteorder.h" |
14 #include "media/cast/cast_defines.h" | 13 #include "media/cast/cast_defines.h" |
15 #include "third_party/opus/src/include/opus.h" | 14 #include "third_party/opus/src/include/opus.h" |
16 | 15 |
17 namespace media { | 16 namespace media { |
18 namespace cast { | 17 namespace cast { |
19 | 18 |
20 // Base class that handles the common problem of detecting dropped frames, and | 19 // Base class that handles the common problem of detecting dropped frames, and |
21 // then invoking the Decode() method implemented by the subclasses to convert | 20 // then invoking the Decode() method implemented by the subclasses to convert |
22 // the encoded payload data into usable audio data. | 21 // the encoded payload data into usable audio data. |
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33 cast_initialization_status_(STATUS_AUDIO_UNINITIALIZED), | 32 cast_initialization_status_(STATUS_AUDIO_UNINITIALIZED), |
34 seen_first_frame_(false) { | 33 seen_first_frame_(false) { |
35 if (num_channels_ <= 0 || sampling_rate <= 0 || sampling_rate % 100 != 0) | 34 if (num_channels_ <= 0 || sampling_rate <= 0 || sampling_rate % 100 != 0) |
36 cast_initialization_status_ = STATUS_INVALID_AUDIO_CONFIGURATION; | 35 cast_initialization_status_ = STATUS_INVALID_AUDIO_CONFIGURATION; |
37 } | 36 } |
38 | 37 |
39 CastInitializationStatus InitializationResult() const { | 38 CastInitializationStatus InitializationResult() const { |
40 return cast_initialization_status_; | 39 return cast_initialization_status_; |
41 } | 40 } |
42 | 41 |
43 void DecodeFrame(scoped_ptr<transport::EncodedAudioFrame> encoded_frame, | 42 void DecodeFrame(scoped_ptr<transport::EncodedFrame> encoded_frame, |
44 const DecodeFrameCallback& callback) { | 43 const DecodeFrameCallback& callback) { |
45 DCHECK_EQ(cast_initialization_status_, STATUS_AUDIO_INITIALIZED); | 44 DCHECK_EQ(cast_initialization_status_, STATUS_AUDIO_INITIALIZED); |
46 | 45 |
47 scoped_ptr<AudioBus> decoded_audio; | |
48 if (encoded_frame->codec != codec_) { | |
49 NOTREACHED(); | |
50 cast_environment_->PostTask(CastEnvironment::MAIN, | |
51 FROM_HERE, | |
52 base::Bind(callback, | |
53 base::Passed(&decoded_audio), | |
54 false)); | |
55 } | |
56 | |
57 COMPILE_ASSERT(sizeof(encoded_frame->frame_id) == sizeof(last_frame_id_), | 46 COMPILE_ASSERT(sizeof(encoded_frame->frame_id) == sizeof(last_frame_id_), |
58 size_of_frame_id_types_do_not_match); | 47 size_of_frame_id_types_do_not_match); |
59 bool is_continuous = true; | 48 bool is_continuous = true; |
60 if (seen_first_frame_) { | 49 if (seen_first_frame_) { |
61 const uint32 frames_ahead = encoded_frame->frame_id - last_frame_id_; | 50 const uint32 frames_ahead = encoded_frame->frame_id - last_frame_id_; |
62 if (frames_ahead > 1) { | 51 if (frames_ahead > 1) { |
63 RecoverBecauseFramesWereDropped(); | 52 RecoverBecauseFramesWereDropped(); |
64 is_continuous = false; | 53 is_continuous = false; |
65 } | 54 } |
66 } else { | 55 } else { |
67 seen_first_frame_ = true; | 56 seen_first_frame_ = true; |
68 } | 57 } |
69 last_frame_id_ = encoded_frame->frame_id; | 58 last_frame_id_ = encoded_frame->frame_id; |
70 | 59 |
71 decoded_audio = Decode( | 60 scoped_ptr<AudioBus> decoded_audio = Decode( |
72 reinterpret_cast<uint8*>(string_as_array(&encoded_frame->data)), | 61 encoded_frame->mutable_bytes(), |
73 static_cast<int>(encoded_frame->data.size())); | 62 static_cast<int>(encoded_frame->data.size())); |
74 cast_environment_->PostTask(CastEnvironment::MAIN, | 63 cast_environment_->PostTask(CastEnvironment::MAIN, |
75 FROM_HERE, | 64 FROM_HERE, |
76 base::Bind(callback, | 65 base::Bind(callback, |
77 base::Passed(&decoded_audio), | 66 base::Passed(&decoded_audio), |
78 is_continuous)); | 67 is_continuous)); |
79 } | 68 } |
80 | 69 |
81 protected: | 70 protected: |
82 friend class base::RefCountedThreadSafe<ImplBase>; | 71 friend class base::RefCountedThreadSafe<ImplBase>; |
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232 | 221 |
233 AudioDecoder::~AudioDecoder() {} | 222 AudioDecoder::~AudioDecoder() {} |
234 | 223 |
235 CastInitializationStatus AudioDecoder::InitializationResult() const { | 224 CastInitializationStatus AudioDecoder::InitializationResult() const { |
236 if (impl_) | 225 if (impl_) |
237 return impl_->InitializationResult(); | 226 return impl_->InitializationResult(); |
238 return STATUS_UNSUPPORTED_AUDIO_CODEC; | 227 return STATUS_UNSUPPORTED_AUDIO_CODEC; |
239 } | 228 } |
240 | 229 |
241 void AudioDecoder::DecodeFrame( | 230 void AudioDecoder::DecodeFrame( |
242 scoped_ptr<transport::EncodedAudioFrame> encoded_frame, | 231 scoped_ptr<transport::EncodedFrame> encoded_frame, |
243 const DecodeFrameCallback& callback) { | 232 const DecodeFrameCallback& callback) { |
244 DCHECK(encoded_frame.get()); | 233 DCHECK(encoded_frame.get()); |
245 DCHECK(!callback.is_null()); | 234 DCHECK(!callback.is_null()); |
246 if (!impl_ || impl_->InitializationResult() != STATUS_AUDIO_INITIALIZED) { | 235 if (!impl_ || impl_->InitializationResult() != STATUS_AUDIO_INITIALIZED) { |
247 callback.Run(make_scoped_ptr<AudioBus>(NULL), false); | 236 callback.Run(make_scoped_ptr<AudioBus>(NULL), false); |
248 return; | 237 return; |
249 } | 238 } |
250 cast_environment_->PostTask(CastEnvironment::AUDIO, | 239 cast_environment_->PostTask(CastEnvironment::AUDIO, |
251 FROM_HERE, | 240 FROM_HERE, |
252 base::Bind(&AudioDecoder::ImplBase::DecodeFrame, | 241 base::Bind(&AudioDecoder::ImplBase::DecodeFrame, |
253 impl_, | 242 impl_, |
254 base::Passed(&encoded_frame), | 243 base::Passed(&encoded_frame), |
255 callback)); | 244 callback)); |
256 } | 245 } |
257 | 246 |
258 } // namespace cast | 247 } // namespace cast |
259 } // namespace media | 248 } // namespace media |
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