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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 <CoreAudio/AudioHardware.h> | 5 #include <CoreAudio/AudioHardware.h> |
6 | 6 |
7 #include "base/sys_info.h" | 7 #include "base/sys_info.h" |
8 #include "media/audio/fake_audio_input_stream.h" | 8 #include "media/audio/fake_audio_input_stream.h" |
9 #include "media/audio/fake_audio_output_stream.h" | 9 #include "media/audio/fake_audio_output_stream.h" |
10 #include "media/audio/mac/audio_input_mac.h" | 10 #include "media/audio/mac/audio_input_mac.h" |
11 #include "media/audio/mac/audio_low_latency_output_mac.h" | 11 #include "media/audio/mac/audio_low_latency_output_mac.h" |
12 #include "media/audio/mac/audio_manager_mac.h" | 12 #include "media/audio/mac/audio_manager_mac.h" |
13 #include "media/audio/mac/audio_output_mac.h" | 13 #include "media/audio/mac/audio_output_mac.h" |
14 #include "media/base/limits.h" | 14 #include "media/base/limits.h" |
15 | 15 |
16 namespace { | 16 static const int kMaxInputChannels = 2; |
17 | |
18 const int kMaxInputChannels = 2; | |
19 | 17 |
20 // Maximum number of output streams that can be open simultaneously. | 18 // Maximum number of output streams that can be open simultaneously. |
21 const size_t kMaxOutputStreams = 50; | 19 static const size_t kMaxOutputStreams = 50; |
22 | 20 |
23 // By experiment the maximum number of audio streams allowed in Leopard | 21 // By experiment the maximum number of audio streams allowed in Leopard |
24 // is 18. But we put a slightly smaller number just to be safe. | 22 // is 18. But we put a slightly smaller number just to be safe. |
25 const size_t kMaxOutputStreamsLeopard = 15; | 23 static const size_t kMaxOutputStreamsLeopard = 15; |
26 | 24 |
27 // Initialized to ether |kMaxOutputStreams| or |kMaxOutputStreamsLeopard|. | 25 // Initialized to ether |kMaxOutputStreams| or |kMaxOutputStreamsLeopard|. |
28 size_t g_max_output_streams = 0; | 26 static size_t g_max_output_streams = 0; |
29 | 27 |
30 // Returns the number of audio streams allowed. This is a practical limit to | 28 // Returns the number of audio streams allowed. This is a practical limit to |
31 // prevent failure caused by too many audio streams opened. | 29 // prevent failure caused by too many audio streams opened. |
32 size_t GetMaxAudioOutputStreamsAllowed() { | 30 static size_t GetMaxAudioOutputStreamsAllowed() { |
33 if (g_max_output_streams == 0) { | 31 if (g_max_output_streams == 0) { |
34 // We are hitting a bug in Leopard where too many audio streams will cause | 32 // We are hitting a bug in Leopard where too many audio streams will cause |
35 // a deadlock in the AudioQueue API when starting the stream. Unfortunately | 33 // a deadlock in the AudioQueue API when starting the stream. Unfortunately |
36 // there's no way to detect it within the AudioQueue API, so we put a | 34 // there's no way to detect it within the AudioQueue API, so we put a |
37 // special hard limit only for Leopard. | 35 // special hard limit only for Leopard. |
38 // See bug: http://crbug.com/30242 | 36 // See bug: http://crbug.com/30242 |
39 int32 major, minor, bugfix; | 37 int32 major, minor, bugfix; |
40 base::SysInfo::OperatingSystemVersionNumbers(&major, &minor, &bugfix); | 38 base::SysInfo::OperatingSystemVersionNumbers(&major, &minor, &bugfix); |
41 if (major < 10 || (major == 10 && minor <= 5)) { | 39 if (major < 10 || (major == 10 && minor <= 5)) { |
42 g_max_output_streams = kMaxOutputStreamsLeopard; | 40 g_max_output_streams = kMaxOutputStreamsLeopard; |
43 } else { | 41 } else { |
44 // In OS other than OSX Leopard, the number of audio streams | 42 // In OS other than OSX Leopard, the number of audio streams |
45 // allowed is a lot more. | 43 // allowed is a lot more. |
46 g_max_output_streams = kMaxOutputStreams; | 44 g_max_output_streams = kMaxOutputStreams; |
47 } | 45 } |
48 } | 46 } |
49 | 47 |
50 return g_max_output_streams; | 48 return g_max_output_streams; |
51 } | 49 } |
52 | 50 |
53 bool HasAudioHardware(AudioObjectPropertySelector selector) { | 51 static bool HasAudioHardware(AudioObjectPropertySelector selector) { |
54 AudioDeviceID output_device_id = kAudioObjectUnknown; | 52 AudioDeviceID output_device_id = kAudioObjectUnknown; |
55 const AudioObjectPropertyAddress property_address = { | 53 const AudioObjectPropertyAddress property_address = { |
56 selector, | 54 selector, |
57 kAudioObjectPropertyScopeGlobal, // mScope | 55 kAudioObjectPropertyScopeGlobal, // mScope |
58 kAudioObjectPropertyElementMaster // mElement | 56 kAudioObjectPropertyElementMaster // mElement |
59 }; | 57 }; |
60 size_t output_device_id_size = sizeof(output_device_id); | 58 size_t output_device_id_size = sizeof(output_device_id); |
61 OSStatus err = AudioObjectGetPropertyData(kAudioObjectSystemObject, | 59 OSStatus err = AudioObjectGetPropertyData(kAudioObjectSystemObject, |
62 &property_address, | 60 &property_address, |
63 0, // inQualifierDataSize | 61 0, // inQualifierDataSize |
64 NULL, // inQualifierData | 62 NULL, // inQualifierData |
65 &output_device_id_size, | 63 &output_device_id_size, |
66 &output_device_id); | 64 &output_device_id); |
67 return err == kAudioHardwareNoError && | 65 return err == kAudioHardwareNoError && |
68 output_device_id != kAudioObjectUnknown; | 66 output_device_id != kAudioObjectUnknown; |
69 } | 67 } |
70 } // namespace | |
71 | 68 |
72 AudioManagerMac::AudioManagerMac() | 69 AudioManagerMac::AudioManagerMac() |
73 : num_output_streams_(0) { | 70 : num_output_streams_(0) { |
74 } | 71 } |
75 | 72 |
76 AudioManagerMac::~AudioManagerMac() { | 73 AudioManagerMac::~AudioManagerMac() { |
77 } | 74 } |
78 | 75 |
79 bool AudioManagerMac::HasAudioOutputDevices() { | 76 bool AudioManagerMac::HasAudioOutputDevices() { |
80 return HasAudioHardware(kAudioHardwarePropertyDefaultOutputDevice); | 77 return HasAudioHardware(kAudioHardwarePropertyDefaultOutputDevice); |
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139 | 136 |
140 // Called by the stream when it has been released by calling Close(). | 137 // Called by the stream when it has been released by calling Close(). |
141 void AudioManagerMac::ReleaseInputStream(PCMQueueInAudioInputStream* stream) { | 138 void AudioManagerMac::ReleaseInputStream(PCMQueueInAudioInputStream* stream) { |
142 delete stream; | 139 delete stream; |
143 } | 140 } |
144 | 141 |
145 // static | 142 // static |
146 AudioManager* AudioManager::CreateAudioManager() { | 143 AudioManager* AudioManager::CreateAudioManager() { |
147 return new AudioManagerMac(); | 144 return new AudioManagerMac(); |
148 } | 145 } |
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