OLD | NEW |
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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/audio/virtual_audio_input_stream.h" | 5 #include "media/audio/virtual_audio_input_stream.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 #include <utility> | 8 #include <utility> |
9 | 9 |
10 #include "base/bind.h" | 10 #include "base/bind.h" |
11 #include "base/message_loop/message_loop.h" | 11 #include "base/single_thread_task_runner.h" |
12 #include "base/message_loop/message_loop_proxy.h" | |
13 #include "media/audio/virtual_audio_output_stream.h" | 12 #include "media/audio/virtual_audio_output_stream.h" |
14 | 13 |
15 namespace media { | 14 namespace media { |
16 | 15 |
17 // LoopbackAudioConverter works similar to AudioConverter and converts input | 16 // LoopbackAudioConverter works similar to AudioConverter and converts input |
18 // streams to different audio parameters. Then, the LoopbackAudioConverter can | 17 // streams to different audio parameters. Then, the LoopbackAudioConverter can |
19 // be used as an input to another AudioConverter. This allows us to | 18 // be used as an input to another AudioConverter. This allows us to |
20 // use converted audio from AudioOutputStreams as input to an AudioConverter. | 19 // use converted audio from AudioOutputStreams as input to an AudioConverter. |
21 // For example, this allows converting multiple streams into a common format and | 20 // For example, this allows converting multiple streams into a common format and |
22 // using the converted audio as input to another AudioConverter (i.e. a mixer). | 21 // using the converted audio as input to another AudioConverter (i.e. a mixer). |
(...skipping 20 matching lines...) Expand all Loading... |
43 return 1.0; | 42 return 1.0; |
44 } | 43 } |
45 | 44 |
46 AudioConverter audio_converter_; | 45 AudioConverter audio_converter_; |
47 | 46 |
48 DISALLOW_COPY_AND_ASSIGN(LoopbackAudioConverter); | 47 DISALLOW_COPY_AND_ASSIGN(LoopbackAudioConverter); |
49 }; | 48 }; |
50 | 49 |
51 VirtualAudioInputStream::VirtualAudioInputStream( | 50 VirtualAudioInputStream::VirtualAudioInputStream( |
52 const AudioParameters& params, | 51 const AudioParameters& params, |
53 const scoped_refptr<base::MessageLoopProxy>& worker_loop, | 52 const scoped_refptr<base::SingleThreadTaskRunner>& worker_task_runner, |
54 const AfterCloseCallback& after_close_cb) | 53 const AfterCloseCallback& after_close_cb) |
55 : worker_loop_(worker_loop), | 54 : worker_task_runner_(worker_task_runner), |
56 after_close_cb_(after_close_cb), | 55 after_close_cb_(after_close_cb), |
57 callback_(NULL), | 56 callback_(NULL), |
58 buffer_(new uint8[params.GetBytesPerBuffer()]), | 57 buffer_(new uint8[params.GetBytesPerBuffer()]), |
59 params_(params), | 58 params_(params), |
60 mixer_(params_, params_, false), | 59 mixer_(params_, params_, false), |
61 num_attached_output_streams_(0), | 60 num_attached_output_streams_(0), |
62 fake_consumer_(worker_loop_, params_) { | 61 fake_consumer_(worker_task_runner_, params_) { |
63 DCHECK(params_.IsValid()); | 62 DCHECK(params_.IsValid()); |
64 DCHECK(worker_loop_.get()); | 63 DCHECK(worker_task_runner_.get()); |
65 | 64 |
66 // VAIS can be constructed on any thread, but will DCHECK that all | 65 // VAIS can be constructed on any thread, but will DCHECK that all |
67 // AudioInputStream methods are called from the same thread. | 66 // AudioInputStream methods are called from the same thread. |
68 thread_checker_.DetachFromThread(); | 67 thread_checker_.DetachFromThread(); |
69 } | 68 } |
70 | 69 |
71 VirtualAudioInputStream::~VirtualAudioInputStream() { | 70 VirtualAudioInputStream::~VirtualAudioInputStream() { |
72 DCHECK(!callback_); | 71 DCHECK(!callback_); |
73 | 72 |
74 // Sanity-check: Contract for Add/RemoveOutputStream() requires that all | 73 // Sanity-check: Contract for Add/RemoveOutputStream() requires that all |
(...skipping 52 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
127 base::AutoLock scoped_lock(converter_network_lock_); | 126 base::AutoLock scoped_lock(converter_network_lock_); |
128 | 127 |
129 DCHECK(converters_.find(output_params) != converters_.end()); | 128 DCHECK(converters_.find(output_params) != converters_.end()); |
130 converters_[output_params]->RemoveInput(stream); | 129 converters_[output_params]->RemoveInput(stream); |
131 | 130 |
132 --num_attached_output_streams_; | 131 --num_attached_output_streams_; |
133 DCHECK_LE(0, num_attached_output_streams_); | 132 DCHECK_LE(0, num_attached_output_streams_); |
134 } | 133 } |
135 | 134 |
136 void VirtualAudioInputStream::PumpAudio(AudioBus* audio_bus) { | 135 void VirtualAudioInputStream::PumpAudio(AudioBus* audio_bus) { |
137 DCHECK(worker_loop_->BelongsToCurrentThread()); | 136 DCHECK(worker_task_runner_->BelongsToCurrentThread()); |
138 | 137 |
139 { | 138 { |
140 base::AutoLock scoped_lock(converter_network_lock_); | 139 base::AutoLock scoped_lock(converter_network_lock_); |
141 mixer_.Convert(audio_bus); | 140 mixer_.Convert(audio_bus); |
142 } | 141 } |
143 audio_bus->ToInterleaved(params_.frames_per_buffer(), | 142 audio_bus->ToInterleaved(params_.frames_per_buffer(), |
144 params_.bits_per_sample() / 8, | 143 params_.bits_per_sample() / 8, |
145 buffer_.get()); | 144 buffer_.get()); |
146 callback_->OnData(this, | 145 callback_->OnData(this, |
147 buffer_.get(), | 146 buffer_.get(), |
(...skipping 27 matching lines...) Expand all Loading... |
175 return 1.0; | 174 return 1.0; |
176 } | 175 } |
177 | 176 |
178 void VirtualAudioInputStream::SetAutomaticGainControl(bool enabled) {} | 177 void VirtualAudioInputStream::SetAutomaticGainControl(bool enabled) {} |
179 | 178 |
180 bool VirtualAudioInputStream::GetAutomaticGainControl() { | 179 bool VirtualAudioInputStream::GetAutomaticGainControl() { |
181 return false; | 180 return false; |
182 } | 181 } |
183 | 182 |
184 } // namespace media | 183 } // namespace media |
OLD | NEW |