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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 #ifndef MEDIA_AUDIO_MAC_AUDIO_INPUT_MAC_H_ | 5 #ifndef MEDIA_AUDIO_MAC_AUDIO_INPUT_MAC_H_ |
6 #define MEDIA_AUDIO_MAC_AUDIO_INPUT_MAC_H_ | 6 #define MEDIA_AUDIO_MAC_AUDIO_INPUT_MAC_H_ |
7 | 7 |
8 #include <AudioToolbox/AudioQueue.h> | 8 #include <AudioToolbox/AudioQueue.h> |
9 #include <AudioToolbox/AudioFormat.h> | 9 #include <AudioToolbox/AudioFormat.h> |
10 | 10 |
11 #include "base/compiler_specific.h" | 11 #include "base/compiler_specific.h" |
| 12 #include "base/time.h" |
12 #include "media/audio/audio_io.h" | 13 #include "media/audio/audio_io.h" |
13 #include "media/audio/audio_parameters.h" | 14 #include "media/audio/audio_parameters.h" |
14 | 15 |
15 namespace media { | 16 namespace media { |
16 | 17 |
17 class AudioManagerBase; | 18 class AudioManagerBase; |
18 | 19 |
19 // Implementation of AudioInputStream for Mac OS X using the audio queue service | 20 // Implementation of AudioInputStream for Mac OS X using the audio queue service |
20 // present in OS 10.5 and later. Design reflects PCMQueueOutAudioOutputStream. | 21 // present in OS 10.5 and later. Design reflects PCMQueueOutAudioOutputStream. |
21 class PCMQueueInAudioInputStream : public AudioInputStream { | 22 class PCMQueueInAudioInputStream : public AudioInputStream { |
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55 UInt32 num_packets, | 56 UInt32 num_packets, |
56 const AudioStreamPacketDescription* desc); | 57 const AudioStreamPacketDescription* desc); |
57 | 58 |
58 // Handles callback from OS. Will be called on OS internal thread. | 59 // Handles callback from OS. Will be called on OS internal thread. |
59 void HandleInputBuffer(AudioQueueRef audio_queue, | 60 void HandleInputBuffer(AudioQueueRef audio_queue, |
60 AudioQueueBufferRef audio_buffer, | 61 AudioQueueBufferRef audio_buffer, |
61 const AudioTimeStamp* start_time, | 62 const AudioTimeStamp* start_time, |
62 UInt32 num_packets, | 63 UInt32 num_packets, |
63 const AudioStreamPacketDescription* packet_desc); | 64 const AudioStreamPacketDescription* packet_desc); |
64 | 65 |
65 static const int kNumberBuffers = 1; | 66 static const int kNumberBuffers = 3; |
66 | 67 |
67 // Manager that owns this stream, used for closing down. | 68 // Manager that owns this stream, used for closing down. |
68 AudioManagerBase* manager_; | 69 AudioManagerBase* manager_; |
69 // We use the callback mostly to periodically supply the recorded audio data. | 70 // We use the callback mostly to periodically supply the recorded audio data. |
70 AudioInputCallback* callback_; | 71 AudioInputCallback* callback_; |
71 // Structure that holds the stream format details such as bitrate. | 72 // Structure that holds the stream format details such as bitrate. |
72 AudioStreamBasicDescription format_; | 73 AudioStreamBasicDescription format_; |
73 // Handle to the OS audio queue object. | 74 // Handle to the OS audio queue object. |
74 AudioQueueRef audio_queue_; | 75 AudioQueueRef audio_queue_; |
75 // Size of each of the buffers in |audio_buffers_| | 76 // Size of each of the buffers in |audio_buffers_| |
76 uint32 buffer_size_bytes_; | 77 uint32 buffer_size_bytes_; |
77 // True iff Start() has been called successfully. | 78 // True iff Start() has been called successfully. |
78 bool started_; | 79 bool started_; |
| 80 // Used to determine if we need to slow down |callback_| calls. |
| 81 base::Time last_fill_; |
79 | 82 |
80 DISALLOW_COPY_AND_ASSIGN(PCMQueueInAudioInputStream); | 83 DISALLOW_COPY_AND_ASSIGN(PCMQueueInAudioInputStream); |
81 }; | 84 }; |
82 | 85 |
83 } // namespace media | 86 } // namespace media |
84 | 87 |
85 #endif // MEDIA_AUDIO_MAC_AUDIO_INPUT_MAC_H_ | 88 #endif // MEDIA_AUDIO_MAC_AUDIO_INPUT_MAC_H_ |
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