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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 // Implementation of AudioInputStream for Mac OS X using the special AUHAL | 5 // Implementation of AudioInputStream for Mac OS X using the special AUHAL |
| 6 // input Audio Unit present in OS 10.4 and later. | 6 // input Audio Unit present in OS 10.4 and later. |
| 7 // The AUHAL input Audio Unit is for low-latency audio I/O. | 7 // The AUHAL input Audio Unit is for low-latency audio I/O. |
| 8 // | 8 // |
| 9 // Overview of operation: | 9 // Overview of operation: |
| 10 // | 10 // |
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| 31 // 1) Hardware latency, which includes Audio Unit latency, audio device | 31 // 1) Hardware latency, which includes Audio Unit latency, audio device |
| 32 // latency; | 32 // latency; |
| 33 // 2) The delay between the actual recording instant and the time when the | 33 // 2) The delay between the actual recording instant and the time when the |
| 34 // data packet is provided as a callback. | 34 // data packet is provided as a callback. |
| 35 // | 35 // |
| 36 #ifndef MEDIA_AUDIO_MAC_AUDIO_LOW_LATENCY_INPUT_MAC_H_ | 36 #ifndef MEDIA_AUDIO_MAC_AUDIO_LOW_LATENCY_INPUT_MAC_H_ |
| 37 #define MEDIA_AUDIO_MAC_AUDIO_LOW_LATENCY_INPUT_MAC_H_ | 37 #define MEDIA_AUDIO_MAC_AUDIO_LOW_LATENCY_INPUT_MAC_H_ |
| 38 | 38 |
| 39 #include <AudioUnit/AudioUnit.h> | 39 #include <AudioUnit/AudioUnit.h> |
| 40 #include <CoreAudio/CoreAudio.h> | 40 #include <CoreAudio/CoreAudio.h> |
| 41 |
| 41 #include <map> | 42 #include <map> |
| 43 #include <memory> |
| 42 #include <vector> | 44 #include <vector> |
| 43 | 45 |
| 44 #include "base/atomicops.h" | 46 #include "base/atomicops.h" |
| 45 #include "base/cancelable_callback.h" | 47 #include "base/cancelable_callback.h" |
| 46 #include "base/macros.h" | 48 #include "base/macros.h" |
| 47 #include "base/memory/scoped_ptr.h" | |
| 48 #include "base/memory/weak_ptr.h" | 49 #include "base/memory/weak_ptr.h" |
| 49 #include "base/threading/thread_checker.h" | 50 #include "base/threading/thread_checker.h" |
| 50 #include "base/time/time.h" | 51 #include "base/time/time.h" |
| 51 #include "base/timer/timer.h" | 52 #include "base/timer/timer.h" |
| 52 #include "media/audio/agc_audio_stream.h" | 53 #include "media/audio/agc_audio_stream.h" |
| 53 #include "media/audio/audio_io.h" | 54 #include "media/audio/audio_io.h" |
| 54 #include "media/base/audio_block_fifo.h" | 55 #include "media/base/audio_block_fifo.h" |
| 55 #include "media/base/audio_parameters.h" | 56 #include "media/base/audio_parameters.h" |
| 56 | 57 |
| 57 namespace media { | 58 namespace media { |
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| 222 AudioUnit audio_unit_; | 223 AudioUnit audio_unit_; |
| 223 | 224 |
| 224 // The UID refers to the current input audio device. | 225 // The UID refers to the current input audio device. |
| 225 const AudioDeviceID input_device_id_; | 226 const AudioDeviceID input_device_id_; |
| 226 | 227 |
| 227 // Provides a mechanism for encapsulating one or more buffers of audio data. | 228 // Provides a mechanism for encapsulating one or more buffers of audio data. |
| 228 AudioBufferList audio_buffer_list_; | 229 AudioBufferList audio_buffer_list_; |
| 229 | 230 |
| 230 // Temporary storage for recorded data. The InputProc() renders into this | 231 // Temporary storage for recorded data. The InputProc() renders into this |
| 231 // array as soon as a frame of the desired buffer size has been recorded. | 232 // array as soon as a frame of the desired buffer size has been recorded. |
| 232 scoped_ptr<uint8_t[]> audio_data_buffer_; | 233 std::unique_ptr<uint8_t[]> audio_data_buffer_; |
| 233 | 234 |
| 234 // Fixed capture hardware latency in frames. | 235 // Fixed capture hardware latency in frames. |
| 235 double hardware_latency_frames_; | 236 double hardware_latency_frames_; |
| 236 | 237 |
| 237 // The number of channels in each frame of audio data, which is used | 238 // The number of channels in each frame of audio data, which is used |
| 238 // when querying the volume of each channel. | 239 // when querying the volume of each channel. |
| 239 int number_of_channels_in_frame_; | 240 int number_of_channels_in_frame_; |
| 240 | 241 |
| 241 // FIFO used to accumulates recorded data. | 242 // FIFO used to accumulates recorded data. |
| 242 media::AudioBlockFifo fifo_; | 243 media::AudioBlockFifo fifo_; |
| 243 | 244 |
| 244 // Used to defer Start() to workaround http://crbug.com/160920. | 245 // Used to defer Start() to workaround http://crbug.com/160920. |
| 245 base::CancelableClosure deferred_start_cb_; | 246 base::CancelableClosure deferred_start_cb_; |
| 246 | 247 |
| 247 // Contains time of last successful call to AudioUnitRender(). | 248 // Contains time of last successful call to AudioUnitRender(). |
| 248 // Initialized first time in Start() and then updated for each valid | 249 // Initialized first time in Start() and then updated for each valid |
| 249 // audio buffer. Used to detect long error sequences and to take actions | 250 // audio buffer. Used to detect long error sequences and to take actions |
| 250 // if length of error sequence is above a certain limit. | 251 // if length of error sequence is above a certain limit. |
| 251 base::TimeTicks last_success_time_; | 252 base::TimeTicks last_success_time_; |
| 252 | 253 |
| 253 // Is set to true on the internal AUHAL IO thread in the first input callback | 254 // Is set to true on the internal AUHAL IO thread in the first input callback |
| 254 // after Start() has bee called. | 255 // after Start() has bee called. |
| 255 base::subtle::Atomic32 input_callback_is_active_; | 256 base::subtle::Atomic32 input_callback_is_active_; |
| 256 | 257 |
| 257 // Timer which triggers CheckInputStartupSuccess() to verify that input | 258 // Timer which triggers CheckInputStartupSuccess() to verify that input |
| 258 // callbacks have started as intended after a successful call to Start(). | 259 // callbacks have started as intended after a successful call to Start(). |
| 259 // This timer lives on the main browser thread. | 260 // This timer lives on the main browser thread. |
| 260 scoped_ptr<base::OneShotTimer> input_callback_timer_; | 261 std::unique_ptr<base::OneShotTimer> input_callback_timer_; |
| 261 | 262 |
| 262 // Set to true if the Start() call was delayed. | 263 // Set to true if the Start() call was delayed. |
| 263 // See AudioManagerMac::ShouldDeferStreamStart() for details. | 264 // See AudioManagerMac::ShouldDeferStreamStart() for details. |
| 264 bool start_was_deferred_; | 265 bool start_was_deferred_; |
| 265 | 266 |
| 266 // Set to true if the audio unit's IO buffer was changed when Open() was | 267 // Set to true if the audio unit's IO buffer was changed when Open() was |
| 267 // called. | 268 // called. |
| 268 bool buffer_size_was_changed_; | 269 bool buffer_size_was_changed_; |
| 269 | 270 |
| 270 // Set to true once when AudioUnitRender() succeeds for the first time. | 271 // Set to true once when AudioUnitRender() succeeds for the first time. |
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| 294 // in the dtor (when no longer receiving callbacks). | 295 // in the dtor (when no longer receiving callbacks). |
| 295 // NOTE: Float64 and UInt32 types are used for native API compatibility. | 296 // NOTE: Float64 and UInt32 types are used for native API compatibility. |
| 296 Float64 last_sample_time_; | 297 Float64 last_sample_time_; |
| 297 UInt32 last_number_of_frames_; | 298 UInt32 last_number_of_frames_; |
| 298 UInt32 total_lost_frames_; | 299 UInt32 total_lost_frames_; |
| 299 UInt32 largest_glitch_frames_; | 300 UInt32 largest_glitch_frames_; |
| 300 int glitches_detected_; | 301 int glitches_detected_; |
| 301 | 302 |
| 302 // Timer that provides periodic callbacks used to monitor if the input stream | 303 // Timer that provides periodic callbacks used to monitor if the input stream |
| 303 // is alive or not. | 304 // is alive or not. |
| 304 scoped_ptr<base::RepeatingTimer> check_alive_timer_; | 305 std::unique_ptr<base::RepeatingTimer> check_alive_timer_; |
| 305 | 306 |
| 306 // Time tick set once in each input data callback. The time is measured on | 307 // Time tick set once in each input data callback. The time is measured on |
| 307 // the real-time priority I/O thread but this member is modified and read | 308 // the real-time priority I/O thread but this member is modified and read |
| 308 // on the main thread only. | 309 // on the main thread only. |
| 309 base::TimeTicks last_callback_time_; | 310 base::TimeTicks last_callback_time_; |
| 310 | 311 |
| 311 // Counts number of times we get a signal of that a restart seems required. | 312 // Counts number of times we get a signal of that a restart seems required. |
| 312 // If it is above a threshold (kNumberOfIndicationsToTriggerRestart), the | 313 // If it is above a threshold (kNumberOfIndicationsToTriggerRestart), the |
| 313 // current audio stream is closed and a new (using same audio parameters) is | 314 // current audio stream is closed and a new (using same audio parameters) is |
| 314 // started. | 315 // started. |
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| 327 // this object is destroyed. | 328 // this object is destroyed. |
| 328 // Note that, all member variables should appear before the WeakPtrFactory. | 329 // Note that, all member variables should appear before the WeakPtrFactory. |
| 329 base::WeakPtrFactory<AUAudioInputStream> weak_factory_; | 330 base::WeakPtrFactory<AUAudioInputStream> weak_factory_; |
| 330 | 331 |
| 331 DISALLOW_COPY_AND_ASSIGN(AUAudioInputStream); | 332 DISALLOW_COPY_AND_ASSIGN(AUAudioInputStream); |
| 332 }; | 333 }; |
| 333 | 334 |
| 334 } // namespace media | 335 } // namespace media |
| 335 | 336 |
| 336 #endif // MEDIA_AUDIO_MAC_AUDIO_LOW_LATENCY_INPUT_MAC_H_ | 337 #endif // MEDIA_AUDIO_MAC_AUDIO_LOW_LATENCY_INPUT_MAC_H_ |
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