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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/pepper/pepper_platform_audio_output_impl.h" | 5 #include "content/renderer/pepper/pepper_platform_audio_output_impl.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/logging.h" | 8 #include "base/logging.h" |
9 #include "base/message_loop_proxy.h" | 9 #include "base/message_loop_proxy.h" |
10 #include "build/build_config.h" | 10 #include "build/build_config.h" |
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113 int sample_rate, | 113 int sample_rate, |
114 int frames_per_buffer, | 114 int frames_per_buffer, |
115 webkit::ppapi::PluginDelegate::PlatformAudioOutputClient* client) { | 115 webkit::ppapi::PluginDelegate::PlatformAudioOutputClient* client) { |
116 DCHECK(client); | 116 DCHECK(client); |
117 // Make sure we don't call init more than once. | 117 // Make sure we don't call init more than once. |
118 DCHECK_EQ(0, stream_id_); | 118 DCHECK_EQ(0, stream_id_); |
119 | 119 |
120 client_ = client; | 120 client_ = client; |
121 | 121 |
122 media::AudioParameters::Format format; | 122 media::AudioParameters::Format format; |
| 123 #if defined(OS_WIN) |
| 124 // For Chrome 21 on Windows, avoid the low-latency (WASAPI) path for the sake |
| 125 // of Pepper Flash. Currently, the WASAPI path will fail silently for, e.g., |
| 126 // 5.1/7.1 sound. (Flash always requests 44.1 kHz anyways, so it's already |
| 127 // using the non-low-latency (wave-out) path on any system that's configured |
| 128 // for 48 kHz.) |
| 129 format = media::AudioParameters::AUDIO_PCM_LINEAR; |
| 130 #else |
123 const int kMaxFramesForLowLatency = 2400; | 131 const int kMaxFramesForLowLatency = 2400; |
124 // Use the low latency back end if the client request is compatible, and | 132 // Use the low latency back end if the client request is compatible, and |
125 // the sample count is low enough to justify using AUDIO_PCM_LOW_LATENCY. | 133 // the sample count is low enough to justify using AUDIO_PCM_LOW_LATENCY. |
126 if (sample_rate == audio_hardware::GetOutputSampleRate() && | 134 if (sample_rate == audio_hardware::GetOutputSampleRate() && |
127 frames_per_buffer <= kMaxFramesForLowLatency && | 135 frames_per_buffer <= kMaxFramesForLowLatency && |
128 frames_per_buffer % audio_hardware::GetOutputBufferSize() == 0) { | 136 frames_per_buffer % audio_hardware::GetOutputBufferSize() == 0) { |
129 format = media::AudioParameters::AUDIO_PCM_LOW_LATENCY; | 137 format = media::AudioParameters::AUDIO_PCM_LOW_LATENCY; |
130 } else { | 138 } else { |
131 format = media::AudioParameters::AUDIO_PCM_LINEAR; | 139 format = media::AudioParameters::AUDIO_PCM_LINEAR; |
132 } | 140 } |
| 141 #endif |
133 | 142 |
134 media::AudioParameters params(format, CHANNEL_LAYOUT_STEREO, sample_rate, 16, | 143 media::AudioParameters params(format, CHANNEL_LAYOUT_STEREO, sample_rate, 16, |
135 frames_per_buffer); | 144 frames_per_buffer); |
136 | 145 |
137 ChildProcess::current()->io_message_loop()->PostTask( | 146 ChildProcess::current()->io_message_loop()->PostTask( |
138 FROM_HERE, | 147 FROM_HERE, |
139 base::Bind(&PepperPlatformAudioOutputImpl::InitializeOnIOThread, | 148 base::Bind(&PepperPlatformAudioOutputImpl::InitializeOnIOThread, |
140 this, params)); | 149 this, params)); |
141 return true; | 150 return true; |
142 } | 151 } |
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164 | 173 |
165 ipc_->CloseStream(stream_id_); | 174 ipc_->CloseStream(stream_id_); |
166 ipc_->RemoveDelegate(stream_id_); | 175 ipc_->RemoveDelegate(stream_id_); |
167 stream_id_ = 0; | 176 stream_id_ = 0; |
168 | 177 |
169 Release(); // Release for the delegate, balances out the reference taken in | 178 Release(); // Release for the delegate, balances out the reference taken in |
170 // PepperPluginDelegateImpl::CreateAudio. | 179 // PepperPluginDelegateImpl::CreateAudio. |
171 } | 180 } |
172 | 181 |
173 } // namespace content | 182 } // namespace content |
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