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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 "content/renderer/media/renderer_webaudiodevice_impl.h" | 5 #include "content/renderer/media/renderer_webaudiodevice_impl.h" |
6 | 6 |
7 #include "base/command_line.h" | |
7 #include "base/logging.h" | 8 #include "base/logging.h" |
8 #include "content/renderer/media/audio_device_factory.h" | 9 #include "content/renderer/media/audio_device_factory.h" |
10 #include "content/public/common/content_switches.h" | |
11 | |
12 #include <math.h> | |
9 | 13 |
10 using content::AudioDeviceFactory; | 14 using content::AudioDeviceFactory; |
11 using WebKit::WebAudioDevice; | 15 using WebKit::WebAudioDevice; |
12 using WebKit::WebVector; | 16 using WebKit::WebVector; |
13 | 17 |
14 RendererWebAudioDeviceImpl::RendererWebAudioDeviceImpl( | 18 RendererWebAudioDeviceImpl::RendererWebAudioDeviceImpl( |
15 const media::AudioParameters& params, | 19 const media::AudioParameters& params, |
16 WebAudioDevice::RenderCallback* callback) | 20 WebAudioDevice::RenderCallback* callback) |
17 : is_running_(false), | 21 : is_running_(false), |
18 client_callback_(callback) { | 22 client_callback_(callback) { |
19 audio_device_ = AudioDeviceFactory::NewOutputDevice(); | 23 audio_device_ = AudioDeviceFactory::NewOutputDevice(); |
20 audio_device_->Initialize(params, this); | 24 |
25 // TODO(crogers): remove once we properly handle input device selection. | |
tommi (sloooow) - chröme
2012/09/07 09:58:19
file a bug for tracking?
Chris Rogers
2012/09/07 20:34:01
Done.
| |
26 if (CommandLine::ForCurrentProcess()->HasSwitch( | |
27 switches::kEnableWebAudioInput)) { | |
28 audio_device_->InitializeIO(params, 2, this); | |
tommi (sloooow) - chröme
2012/09/07 09:58:19
won't hardcoding this at 2 be problematic for non-
Chris Rogers
2012/09/07 20:34:01
The Mac-backend will automatically handle this cas
| |
29 } else { | |
30 audio_device_->Initialize(params, this); | |
31 } | |
21 } | 32 } |
22 | 33 |
23 RendererWebAudioDeviceImpl::~RendererWebAudioDeviceImpl() { | 34 RendererWebAudioDeviceImpl::~RendererWebAudioDeviceImpl() { |
24 stop(); | 35 stop(); |
25 } | 36 } |
26 | 37 |
27 void RendererWebAudioDeviceImpl::start() { | 38 void RendererWebAudioDeviceImpl::start() { |
28 if (!is_running_) { | 39 if (!is_running_) { |
29 audio_device_->Start(); | 40 audio_device_->Start(); |
30 is_running_ = true; | 41 is_running_ = true; |
31 } | 42 } |
32 } | 43 } |
33 | 44 |
34 void RendererWebAudioDeviceImpl::stop() { | 45 void RendererWebAudioDeviceImpl::stop() { |
35 if (is_running_) { | 46 if (is_running_) { |
36 audio_device_->Stop(); | 47 audio_device_->Stop(); |
37 is_running_ = false; | 48 is_running_ = false; |
38 } | 49 } |
39 } | 50 } |
40 | 51 |
41 double RendererWebAudioDeviceImpl::sampleRate() { | 52 double RendererWebAudioDeviceImpl::sampleRate() { |
42 return 44100.0; | 53 return 44100.0; |
43 } | 54 } |
44 | 55 |
45 int RendererWebAudioDeviceImpl::Render(media::AudioBus* audio_bus, | 56 int RendererWebAudioDeviceImpl::Render(media::AudioBus* audio_bus, |
46 int audio_delay_milliseconds) { | 57 int audio_delay_milliseconds) { |
47 // Make the client callback to get rendered audio. | 58 RenderIO(NULL, audio_bus, audio_delay_milliseconds); |
59 return audio_bus->frames(); | |
60 } | |
61 | |
62 void RendererWebAudioDeviceImpl::RenderIO(media::AudioBus* audio_input_bus, | |
63 media::AudioBus* audio_bus, | |
64 int audio_delay_milliseconds) { | |
65 // Make the client callback for an I/O cycle. | |
48 DCHECK(client_callback_); | 66 DCHECK(client_callback_); |
49 if (client_callback_) { | 67 if (client_callback_) { |
50 // Wrap the pointers using WebVector. | 68 // Wrap the inputs pointers using WebVector. |
69 size_t input_channels = | |
70 audio_input_bus ? static_cast<size_t>(audio_input_bus->channels()) : 0; | |
71 WebVector<float*> web_audio_input_data(input_channels); | |
72 for (size_t i = 0; i < input_channels; ++i) | |
73 web_audio_input_data[i] = audio_input_bus->channel(i); | |
74 | |
75 // Wrap the output pointers using WebVector. | |
51 WebVector<float*> web_audio_data( | 76 WebVector<float*> web_audio_data( |
52 static_cast<size_t>(audio_bus->channels())); | 77 static_cast<size_t>(audio_bus->channels())); |
53 for (int i = 0; i < audio_bus->channels(); ++i) | 78 for (int i = 0; i < audio_bus->channels(); ++i) |
54 web_audio_data[i] = audio_bus->channel(i); | 79 web_audio_data[i] = audio_bus->channel(i); |
55 | 80 |
56 client_callback_->render(web_audio_data, audio_bus->frames()); | 81 client_callback_->render(web_audio_input_data, |
82 web_audio_data, | |
83 audio_bus->frames()); | |
57 } | 84 } |
58 return audio_bus->frames(); | |
59 } | 85 } |
60 | 86 |
61 void RendererWebAudioDeviceImpl::OnRenderError() { | 87 void RendererWebAudioDeviceImpl::OnRenderError() { |
62 // TODO(crogers): implement error handling. | 88 // TODO(crogers): implement error handling. |
63 } | 89 } |
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