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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/command_line.h" | 8 #include "base/command_line.h" |
| 9 #include "base/logging.h" | 9 #include "base/logging.h" |
| 10 #include "base/message_loop_proxy.h" | 10 #include "base/message_loop_proxy.h" |
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| 118 DCHECK(client); | 118 DCHECK(client); |
| 119 // Make sure we don't call init more than once. | 119 // Make sure we don't call init more than once. |
| 120 DCHECK_EQ(0, stream_id_); | 120 DCHECK_EQ(0, stream_id_); |
| 121 | 121 |
| 122 client_ = client; | 122 client_ = client; |
| 123 | 123 |
| 124 media::AudioParameters::Format format; | 124 media::AudioParameters::Format format; |
| 125 const int kMaxFramesForLowLatency = 2047; | 125 const int kMaxFramesForLowLatency = 2047; |
| 126 | 126 |
| 127 const CommandLine* cmd_line = CommandLine::ForCurrentProcess(); | 127 const CommandLine* cmd_line = CommandLine::ForCurrentProcess(); |
| 128 if (cmd_line->HasSwitch(switches::kEnableAudioOutputResampler)) { | 128 if (!cmd_line->HasSwitch(switches::kDisableAudioOutputResampler)) { |
| 129 // Rely on AudioOutputResampler to handle any inconsistencies between the | 129 // Rely on AudioOutputResampler to handle any inconsistencies between the |
| 130 // hardware params required for low latency and the requested params. | 130 // hardware params required for low latency and the requested params. |
| 131 format = media::AudioParameters::AUDIO_PCM_LOW_LATENCY; | 131 format = media::AudioParameters::AUDIO_PCM_LOW_LATENCY; |
| 132 } else if (sample_rate == audio_hardware::GetOutputSampleRate() && | 132 } else if (sample_rate == audio_hardware::GetOutputSampleRate() && |
| 133 frames_per_buffer <= kMaxFramesForLowLatency && | 133 frames_per_buffer <= kMaxFramesForLowLatency && |
| 134 frames_per_buffer % audio_hardware::GetOutputBufferSize() == 0) { | 134 frames_per_buffer % audio_hardware::GetOutputBufferSize() == 0) { |
| 135 // Use the low latency back end if the client request is compatible, and | 135 // Use the low latency back end if the client request is compatible, and |
| 136 // the sample count is low enough to justify using AUDIO_PCM_LOW_LATENCY. | 136 // the sample count is low enough to justify using AUDIO_PCM_LOW_LATENCY. |
| 137 format = media::AudioParameters::AUDIO_PCM_LOW_LATENCY; | 137 format = media::AudioParameters::AUDIO_PCM_LOW_LATENCY; |
| 138 } else { | 138 } else { |
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| 172 | 172 |
| 173 ipc_->CloseStream(stream_id_); | 173 ipc_->CloseStream(stream_id_); |
| 174 ipc_->RemoveDelegate(stream_id_); | 174 ipc_->RemoveDelegate(stream_id_); |
| 175 stream_id_ = 0; | 175 stream_id_ = 0; |
| 176 | 176 |
| 177 Release(); // Release for the delegate, balances out the reference taken in | 177 Release(); // Release for the delegate, balances out the reference taken in |
| 178 // PepperPluginDelegateImpl::CreateAudio. | 178 // PepperPluginDelegateImpl::CreateAudio. |
| 179 } | 179 } |
| 180 | 180 |
| 181 } // namespace content | 181 } // namespace content |
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