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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_input_device.h" | 5 #include "media/audio/audio_input_device.h" |
6 | 6 |
7 #include "base/basictypes.h" | 7 #include "base/basictypes.h" |
8 #include "base/bind.h" | 8 #include "base/bind.h" |
9 #include "base/memory/scoped_vector.h" | 9 #include "base/memory/scoped_vector.h" |
10 #include "base/threading/thread_restrictions.h" | 10 #include "base/threading/thread_restrictions.h" |
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29 AudioThreadCallback(const AudioParameters& audio_parameters, | 29 AudioThreadCallback(const AudioParameters& audio_parameters, |
30 base::SharedMemoryHandle memory, | 30 base::SharedMemoryHandle memory, |
31 int memory_length, | 31 int memory_length, |
32 int total_segments, | 32 int total_segments, |
33 CaptureCallback* capture_callback); | 33 CaptureCallback* capture_callback); |
34 ~AudioThreadCallback() override; | 34 ~AudioThreadCallback() override; |
35 | 35 |
36 void MapSharedMemory() override; | 36 void MapSharedMemory() override; |
37 | 37 |
38 // Called whenever we receive notifications about pending data. | 38 // Called whenever we receive notifications about pending data. |
39 void Process(int pending_data) override; | 39 void Process(uint32 pending_data) override; |
40 | 40 |
41 private: | 41 private: |
42 int current_segment_id_; | 42 int current_segment_id_; |
43 ScopedVector<media::AudioBus> audio_buses_; | 43 ScopedVector<media::AudioBus> audio_buses_; |
44 CaptureCallback* capture_callback_; | 44 CaptureCallback* capture_callback_; |
45 | 45 |
46 DISALLOW_COPY_AND_ASSIGN(AudioThreadCallback); | 46 DISALLOW_COPY_AND_ASSIGN(AudioThreadCallback); |
47 }; | 47 }; |
48 | 48 |
49 AudioInputDevice::AudioInputDevice( | 49 AudioInputDevice::AudioInputDevice( |
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288 for (int i = 0; i < total_segments_; ++i) { | 288 for (int i = 0; i < total_segments_; ++i) { |
289 media::AudioInputBuffer* buffer = | 289 media::AudioInputBuffer* buffer = |
290 reinterpret_cast<media::AudioInputBuffer*>(ptr); | 290 reinterpret_cast<media::AudioInputBuffer*>(ptr); |
291 scoped_ptr<media::AudioBus> audio_bus = | 291 scoped_ptr<media::AudioBus> audio_bus = |
292 media::AudioBus::WrapMemory(audio_parameters_, buffer->audio); | 292 media::AudioBus::WrapMemory(audio_parameters_, buffer->audio); |
293 audio_buses_.push_back(audio_bus.release()); | 293 audio_buses_.push_back(audio_bus.release()); |
294 ptr += segment_length_; | 294 ptr += segment_length_; |
295 } | 295 } |
296 } | 296 } |
297 | 297 |
298 void AudioInputDevice::AudioThreadCallback::Process(int pending_data) { | 298 void AudioInputDevice::AudioThreadCallback::Process(uint32 pending_data) { |
299 // The shared memory represents parameters, size of the data buffer and the | 299 // The shared memory represents parameters, size of the data buffer and the |
300 // actual data buffer containing audio data. Map the memory into this | 300 // actual data buffer containing audio data. Map the memory into this |
301 // structure and parse out parameters and the data area. | 301 // structure and parse out parameters and the data area. |
302 uint8* ptr = static_cast<uint8*>(shared_memory_.memory()); | 302 uint8* ptr = static_cast<uint8*>(shared_memory_.memory()); |
303 ptr += current_segment_id_ * segment_length_; | 303 ptr += current_segment_id_ * segment_length_; |
304 AudioInputBuffer* buffer = reinterpret_cast<AudioInputBuffer*>(ptr); | 304 AudioInputBuffer* buffer = reinterpret_cast<AudioInputBuffer*>(ptr); |
305 // Usually this will be equal but in the case of low sample rate (e.g. 8kHz, | 305 // Usually this will be equal but in the case of low sample rate (e.g. 8kHz, |
306 // the buffer may be bigger (on mac at least)). | 306 // the buffer may be bigger (on mac at least)). |
307 DCHECK_GE(buffer->params.size, | 307 DCHECK_GE(buffer->params.size, |
308 segment_length_ - sizeof(AudioInputBufferParameters)); | 308 segment_length_ - sizeof(AudioInputBufferParameters)); |
309 double volume = buffer->params.volume; | 309 double volume = buffer->params.volume; |
310 bool key_pressed = buffer->params.key_pressed; | 310 bool key_pressed = buffer->params.key_pressed; |
311 | 311 |
312 // Use pre-allocated audio bus wrapping existing block of shared memory. | 312 // Use pre-allocated audio bus wrapping existing block of shared memory. |
313 media::AudioBus* audio_bus = audio_buses_[current_segment_id_]; | 313 media::AudioBus* audio_bus = audio_buses_[current_segment_id_]; |
314 | 314 |
315 // Deliver captured data to the client in floating point format | 315 // Deliver captured data to the client in floating point format |
316 // and update the audio-delay measurement. | 316 // and update the audio-delay measurement. |
317 int audio_delay_milliseconds = pending_data / bytes_per_ms_; | 317 int audio_delay_milliseconds = pending_data / bytes_per_ms_; |
318 capture_callback_->Capture( | 318 capture_callback_->Capture( |
319 audio_bus, audio_delay_milliseconds, volume, key_pressed); | 319 audio_bus, audio_delay_milliseconds, volume, key_pressed); |
320 | 320 |
321 if (++current_segment_id_ >= total_segments_) | 321 if (++current_segment_id_ >= total_segments_) |
322 current_segment_id_ = 0; | 322 current_segment_id_ = 0; |
323 } | 323 } |
324 | 324 |
325 } // namespace media | 325 } // namespace media |
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