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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 "media/audio/audio_output_device.h" | 5 #include "media/audio/audio_output_device.h" |
| 6 | 6 |
| 7 #include "base/basictypes.h" | 7 #include "base/basictypes.h" |
| 8 #include "base/debug/trace_event.h" | 8 #include "base/debug/trace_event.h" |
| 9 #include "base/threading/thread_restrictions.h" | 9 #include "base/threading/thread_restrictions.h" |
| 10 #include "base/time/time.h" | 10 #include "base/time/time.h" |
| 11 #include "media/audio/audio_output_controller.h" | 11 #include "media/audio/audio_output_controller.h" |
| 12 #include "media/base/limits.h" | 12 #include "media/base/limits.h" |
| 13 | 13 |
| 14 namespace media { | 14 namespace media { |
| 15 | 15 |
| 16 // Takes care of invoking the render callback on the audio thread. | 16 // Takes care of invoking the render callback on the audio thread. |
| 17 // An instance of this class is created for each capture stream in | 17 // An instance of this class is created for each capture stream in |
| 18 // OnStreamCreated(). | 18 // OnStreamCreated(). |
| 19 class AudioOutputDevice::AudioThreadCallback | 19 class AudioOutputDevice::AudioThreadCallback |
| 20 : public AudioDeviceThread::Callback { | 20 : public AudioDeviceThread::Callback { |
| 21 public: | 21 public: |
| 22 AudioThreadCallback(const AudioParameters& audio_parameters, | 22 AudioThreadCallback(const AudioParameters& audio_parameters, |
| 23 base::SharedMemoryHandle memory, | 23 base::SharedMemoryHandle memory, |
| 24 int memory_length, | 24 int memory_length, |
| 25 AudioRendererSink::RenderCallback* render_callback); | 25 AudioRendererSink::RenderCallback* render_callback); |
| 26 virtual ~AudioThreadCallback(); | 26 virtual ~AudioThreadCallback(); |
| 27 | 27 |
| 28 virtual void MapSharedMemory() OVERRIDE; | 28 virtual void MapSharedMemory() override; |
| 29 | 29 |
| 30 // Called whenever we receive notifications about pending data. | 30 // Called whenever we receive notifications about pending data. |
| 31 virtual void Process(int pending_data) OVERRIDE; | 31 virtual void Process(int pending_data) override; |
| 32 | 32 |
| 33 private: | 33 private: |
| 34 AudioRendererSink::RenderCallback* render_callback_; | 34 AudioRendererSink::RenderCallback* render_callback_; |
| 35 scoped_ptr<AudioBus> output_bus_; | 35 scoped_ptr<AudioBus> output_bus_; |
| 36 DISALLOW_COPY_AND_ASSIGN(AudioThreadCallback); | 36 DISALLOW_COPY_AND_ASSIGN(AudioThreadCallback); |
| 37 }; | 37 }; |
| 38 | 38 |
| 39 AudioOutputDevice::AudioOutputDevice( | 39 AudioOutputDevice::AudioOutputDevice( |
| 40 scoped_ptr<AudioOutputIPC> ipc, | 40 scoped_ptr<AudioOutputIPC> ipc, |
| 41 const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner) | 41 const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner) |
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| 295 | 295 |
| 296 TRACE_EVENT0("audio", "AudioOutputDevice::FireRenderCallback"); | 296 TRACE_EVENT0("audio", "AudioOutputDevice::FireRenderCallback"); |
| 297 | 297 |
| 298 // Update the audio-delay measurement then ask client to render audio. Since | 298 // Update the audio-delay measurement then ask client to render audio. Since |
| 299 // |output_bus_| is wrapping the shared memory the Render() call is writing | 299 // |output_bus_| is wrapping the shared memory the Render() call is writing |
| 300 // directly into the shared memory. | 300 // directly into the shared memory. |
| 301 render_callback_->Render(output_bus_.get(), audio_delay_milliseconds); | 301 render_callback_->Render(output_bus_.get(), audio_delay_milliseconds); |
| 302 } | 302 } |
| 303 | 303 |
| 304 } // namespace media. | 304 } // namespace media. |
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