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1 // Copyright (c) 2011 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/mac/mac_util.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 static const int kMaxInputChannels = 2; | 16 static const int kMaxInputChannels = 2; |
17 | 17 |
18 // Maximum number of output streams that can be open simultaneously. | 18 // Maximum number of output streams that can be open simultaneously. |
19 static const size_t kMaxOutputStreams = 50; | 19 static const size_t kMaxOutputStreams = 50; |
20 | 20 |
21 // By experiment the maximum number of audio streams allowed in Leopard | 21 // By experiment the maximum number of audio streams allowed in Leopard |
22 // 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. |
23 static const size_t kMaxOutputStreamsLeopard = 15; | 23 static const size_t kMaxOutputStreamsLeopard = 15; |
24 | 24 |
25 // Initialized to ether |kMaxOutputStreams| or |kMaxOutputStreamsLeopard|. | 25 // Initialized to ether |kMaxOutputStreams| or |kMaxOutputStreamsLeopard|. |
26 static size_t g_max_output_streams = 0; | 26 static size_t g_max_output_streams = 0; |
27 | 27 |
28 // 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 |
29 // prevent failure caused by too many audio streams opened. | 29 // prevent failure caused by too many audio streams opened. |
30 static size_t GetMaxAudioOutputStreamsAllowed() { | 30 static size_t GetMaxAudioOutputStreamsAllowed() { |
31 if (g_max_output_streams == 0) { | 31 if (g_max_output_streams == 0) { |
32 // 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 |
33 // a deadlock in the AudioQueue API when starting the stream. Unfortunately | 33 // a deadlock in the AudioQueue API when starting the stream. Unfortunately |
34 // 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 |
35 // special hard limit only for Leopard. | 35 // special hard limit only for Leopard. |
36 // See bug: http://crbug.com/30242 | 36 // See bug: http://crbug.com/30242 |
37 int32 major, minor, bugfix; | 37 if (base::mac::IsOSLeopardOrEarlier()) { |
38 base::SysInfo::OperatingSystemVersionNumbers(&major, &minor, &bugfix); | |
39 if (major < 10 || (major == 10 && minor <= 5)) { | |
40 g_max_output_streams = kMaxOutputStreamsLeopard; | 38 g_max_output_streams = kMaxOutputStreamsLeopard; |
41 } else { | 39 } else { |
42 // In OS other than OSX Leopard, the number of audio streams | 40 // In OS other than OSX Leopard, the number of audio streams |
43 // allowed is a lot more. | 41 // allowed is a lot more. |
44 g_max_output_streams = kMaxOutputStreams; | 42 g_max_output_streams = kMaxOutputStreams; |
45 } | 43 } |
46 } | 44 } |
47 | 45 |
48 return g_max_output_streams; | 46 return g_max_output_streams; |
49 } | 47 } |
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150 | 148 |
151 // Called by the stream when it has been released by calling Close(). | 149 // Called by the stream when it has been released by calling Close(). |
152 void AudioManagerMac::ReleaseInputStream(PCMQueueInAudioInputStream* stream) { | 150 void AudioManagerMac::ReleaseInputStream(PCMQueueInAudioInputStream* stream) { |
153 delete stream; | 151 delete stream; |
154 } | 152 } |
155 | 153 |
156 // static | 154 // static |
157 AudioManager* AudioManager::CreateAudioManager() { | 155 AudioManager* AudioManager::CreateAudioManager() { |
158 return new AudioManagerMac(); | 156 return new AudioManagerMac(); |
159 } | 157 } |
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