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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/mac/audio_low_latency_input_mac.h" | 5 #include "media/audio/mac/audio_low_latency_input_mac.h" |
6 | 6 |
7 #include <CoreServices/CoreServices.h> | 7 #include <CoreServices/CoreServices.h> |
8 | 8 |
9 #include "base/basictypes.h" | 9 #include "base/basictypes.h" |
10 #include "base/logging.h" | 10 #include "base/logging.h" |
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94 if (requested_size_frames < number_of_frames_) { | 94 if (requested_size_frames < number_of_frames_) { |
95 // For devices that only support a low sample rate like 8kHz, we adjust the | 95 // For devices that only support a low sample rate like 8kHz, we adjust the |
96 // buffer size to match number_of_frames_. The value of number_of_frames_ | 96 // buffer size to match number_of_frames_. The value of number_of_frames_ |
97 // in this case has not been calculated based on hardware settings but | 97 // in this case has not been calculated based on hardware settings but |
98 // rather our hardcoded defaults (see ChooseBufferSize). | 98 // rather our hardcoded defaults (see ChooseBufferSize). |
99 requested_size_frames = number_of_frames_; | 99 requested_size_frames = number_of_frames_; |
100 } | 100 } |
101 | 101 |
102 requested_size_bytes_ = requested_size_frames * format_.mBytesPerFrame; | 102 requested_size_bytes_ = requested_size_frames * format_.mBytesPerFrame; |
103 DVLOG(1) << "Requested buffer size in bytes : " << requested_size_bytes_; | 103 DVLOG(1) << "Requested buffer size in bytes : " << requested_size_bytes_; |
104 DLOG_IF(INFO, requested_size_frames > number_of_frames_) << "FIFO is used"; | 104 DVLOG_IF(0, requested_size_frames > number_of_frames_) << "FIFO is used"; |
105 | 105 |
106 const int number_of_bytes = number_of_frames_ * format_.mBytesPerFrame; | 106 const int number_of_bytes = number_of_frames_ * format_.mBytesPerFrame; |
107 fifo_delay_bytes_ = requested_size_bytes_ - number_of_bytes; | 107 fifo_delay_bytes_ = requested_size_bytes_ - number_of_bytes; |
108 | 108 |
109 // Allocate some extra memory to avoid memory reallocations. | 109 // Allocate some extra memory to avoid memory reallocations. |
110 // Ensure that the size is an even multiple of |number_of_frames_ and | 110 // Ensure that the size is an even multiple of |number_of_frames_ and |
111 // larger than |requested_size_frames|. | 111 // larger than |requested_size_frames|. |
112 // Example: number_of_frames_=128, requested_size_frames=480 => | 112 // Example: number_of_frames_=128, requested_size_frames=480 => |
113 // allocated space equals 4*128=512 audio frames | 113 // allocated space equals 4*128=512 audio frames |
114 const int max_forward_capacity = number_of_bytes * | 114 const int max_forward_capacity = number_of_bytes * |
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658 kAudioDevicePropertyScopeInput, | 658 kAudioDevicePropertyScopeInput, |
659 static_cast<UInt32>(channel) | 659 static_cast<UInt32>(channel) |
660 }; | 660 }; |
661 OSStatus result = AudioObjectIsPropertySettable(input_device_id_, | 661 OSStatus result = AudioObjectIsPropertySettable(input_device_id_, |
662 &property_address, | 662 &property_address, |
663 &is_settable); | 663 &is_settable); |
664 return (result == noErr) ? is_settable : false; | 664 return (result == noErr) ? is_settable : false; |
665 } | 665 } |
666 | 666 |
667 } // namespace media | 667 } // namespace media |
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