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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_LINUX_ALSA_INPUT_H_ | 5 #ifndef MEDIA_AUDIO_LINUX_ALSA_INPUT_H_ |
6 #define MEDIA_AUDIO_LINUX_ALSA_INPUT_H_ | 6 #define MEDIA_AUDIO_LINUX_ALSA_INPUT_H_ |
7 | 7 |
8 #include <alsa/asoundlib.h> | 8 #include <alsa/asoundlib.h> |
9 | 9 |
10 #include <string> | 10 #include <string> |
11 | 11 |
12 #include "base/compiler_specific.h" | 12 #include "base/compiler_specific.h" |
13 #include "base/memory/scoped_ptr.h" | 13 #include "base/memory/scoped_ptr.h" |
14 #include "base/memory/weak_ptr.h" | 14 #include "base/memory/weak_ptr.h" |
15 #include "base/time.h" | 15 #include "base/time.h" |
16 #include "media/audio/audio_input_stream_impl.h" | 16 #include "media/audio/audio_input_stream_impl.h" |
17 #include "media/audio/audio_io.h" | 17 #include "media/audio/audio_io.h" |
18 #include "media/audio/audio_parameters.h" | 18 #include "media/audio/audio_parameters.h" |
19 | 19 |
20 namespace media { | |
21 | |
22 class AlsaWrapper; | 20 class AlsaWrapper; |
23 class AudioManagerLinux; | 21 class AudioManagerLinux; |
24 | 22 |
25 // Provides an input stream for audio capture based on the ALSA PCM interface. | 23 // Provides an input stream for audio capture based on the ALSA PCM interface. |
26 // This object is not thread safe and all methods should be invoked in the | 24 // This object is not thread safe and all methods should be invoked in the |
27 // thread that created the object. | 25 // thread that created the object. |
28 class AlsaPcmInputStream : public AudioInputStreamImpl { | 26 class AlsaPcmInputStream : public AudioInputStreamImpl { |
29 public: | 27 public: |
30 // Pass this to the constructor if you want to attempt auto-selection | 28 // Pass this to the constructor if you want to attempt auto-selection |
31 // of the audio recording device. | 29 // of the audio recording device. |
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80 snd_pcm_t* device_handle_; // Handle to the ALSA PCM recording device. | 78 snd_pcm_t* device_handle_; // Handle to the ALSA PCM recording device. |
81 snd_mixer_t* mixer_handle_; // Handle to the ALSA microphone mixer. | 79 snd_mixer_t* mixer_handle_; // Handle to the ALSA microphone mixer. |
82 snd_mixer_elem_t* mixer_element_handle_; // Handle to the capture element. | 80 snd_mixer_elem_t* mixer_element_handle_; // Handle to the capture element. |
83 base::WeakPtrFactory<AlsaPcmInputStream> weak_factory_; | 81 base::WeakPtrFactory<AlsaPcmInputStream> weak_factory_; |
84 scoped_array<uint8> audio_buffer_; // Buffer used for reading audio data. | 82 scoped_array<uint8> audio_buffer_; // Buffer used for reading audio data. |
85 bool read_callback_behind_schedule_; | 83 bool read_callback_behind_schedule_; |
86 | 84 |
87 DISALLOW_COPY_AND_ASSIGN(AlsaPcmInputStream); | 85 DISALLOW_COPY_AND_ASSIGN(AlsaPcmInputStream); |
88 }; | 86 }; |
89 | 87 |
90 } // namespace media | |
91 | |
92 #endif // MEDIA_AUDIO_LINUX_ALSA_INPUT_H_ | 88 #endif // MEDIA_AUDIO_LINUX_ALSA_INPUT_H_ |
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