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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_BASE_AUDIO_RENDERER_MIXER_H_ | 5 #ifndef MEDIA_BASE_AUDIO_RENDERER_MIXER_H_ |
6 #define MEDIA_BASE_AUDIO_RENDERER_MIXER_H_ | 6 #define MEDIA_BASE_AUDIO_RENDERER_MIXER_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include <map> | 10 #include <map> |
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79 // Output sink for this mixer. | 79 // Output sink for this mixer. |
80 const scoped_refptr<AudioRendererSink> audio_sink_; | 80 const scoped_refptr<AudioRendererSink> audio_sink_; |
81 | 81 |
82 // ---------------[ All variables below protected by |lock_| ]--------------- | 82 // ---------------[ All variables below protected by |lock_| ]--------------- |
83 base::Lock lock_; | 83 base::Lock lock_; |
84 | 84 |
85 // List of error callbacks used by this mixer. | 85 // List of error callbacks used by this mixer. |
86 typedef std::list<base::Closure> ErrorCallbackList; | 86 typedef std::list<base::Closure> ErrorCallbackList; |
87 ErrorCallbackList error_callbacks_; | 87 ErrorCallbackList error_callbacks_; |
88 | 88 |
| 89 AudioConverter::InputCallback* raw_input_; |
| 90 |
89 // Each of these converters mixes inputs with a given sample rate and | 91 // Each of these converters mixes inputs with a given sample rate and |
90 // resamples them to the output sample rate. Inputs not reqiuring resampling | 92 // resamples them to the output sample rate. Inputs not reqiuring resampling |
91 // go directly to |master_converter_|. | 93 // go directly to |master_converter_|. |
92 AudioConvertersMap converters_; | 94 AudioConvertersMap converters_; |
93 | 95 |
94 // Master converter which mixes all the outputs from |converters_| as well as | 96 // Master converter which mixes all the outputs from |converters_| as well as |
95 // mixer inputs that are in the output sample rate. | 97 // mixer inputs that are in the output sample rate. |
96 AudioConverter master_converter_; | 98 AudioConverter master_converter_; |
97 | 99 |
98 // Handles physical stream pause when no inputs are playing. For latency | 100 // Handles physical stream pause when no inputs are playing. For latency |
99 // reasons we don't want to immediately pause the physical stream. | 101 // reasons we don't want to immediately pause the physical stream. |
100 base::TimeDelta pause_delay_; | 102 base::TimeDelta pause_delay_; |
101 base::TimeTicks last_play_time_; | 103 base::TimeTicks last_play_time_; |
102 bool playing_; | 104 bool playing_; |
103 | 105 |
104 // Tracks the maximum number of simultaneous mixer inputs and logs it into | 106 // Tracks the maximum number of simultaneous mixer inputs and logs it into |
105 // UMA histogram upon the destruction. | 107 // UMA histogram upon the destruction. |
106 std::unique_ptr<UMAMaxValueTracker> input_count_tracker_; | 108 std::unique_ptr<UMAMaxValueTracker> input_count_tracker_; |
107 | 109 |
108 DISALLOW_COPY_AND_ASSIGN(AudioRendererMixer); | 110 DISALLOW_COPY_AND_ASSIGN(AudioRendererMixer); |
109 }; | 111 }; |
110 | 112 |
111 } // namespace media | 113 } // namespace media |
112 | 114 |
113 #endif // MEDIA_BASE_AUDIO_RENDERER_MIXER_H_ | 115 #endif // MEDIA_BASE_AUDIO_RENDERER_MIXER_H_ |
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