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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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_BUFFER_CONVERTER_H_ | 5 #ifndef MEDIA_BASE_AUDIO_BUFFER_CONVERTER_H_ |
6 #define MEDIA_BASE_AUDIO_BUFFER_CONVERTER_H_ | 6 #define MEDIA_BASE_AUDIO_BUFFER_CONVERTER_H_ |
7 | 7 |
8 #include <deque> | 8 #include <deque> |
9 #include <memory> | 9 #include <memory> |
10 | 10 |
11 #include "base/memory/ref_counted.h" | 11 #include "base/memory/ref_counted.h" |
12 #include "base/time/time.h" | 12 #include "base/time/time.h" |
| 13 #include "media/base/audio_buffer.h" |
13 #include "media/base/audio_converter.h" | 14 #include "media/base/audio_converter.h" |
14 #include "media/base/audio_parameters.h" | 15 #include "media/base/audio_parameters.h" |
15 #include "media/base/audio_timestamp_helper.h" | 16 #include "media/base/audio_timestamp_helper.h" |
16 #include "media/base/media_export.h" | 17 #include "media/base/media_export.h" |
17 | 18 |
18 namespace media { | 19 namespace media { |
19 | 20 |
20 class AudioBuffer; | |
21 class AudioBus; | 21 class AudioBus; |
22 | 22 |
23 // Takes AudioBuffers in any format and uses an AudioConverter to convert them | 23 // Takes AudioBuffers in any format and uses an AudioConverter to convert them |
24 // to a common format (usually the hardware output format). | 24 // to a common format (usually the hardware output format). |
25 class MEDIA_EXPORT AudioBufferConverter : public AudioConverter::InputCallback { | 25 class MEDIA_EXPORT AudioBufferConverter : public AudioConverter::InputCallback { |
26 public: | 26 public: |
27 explicit AudioBufferConverter(const AudioParameters& output_params); | 27 explicit AudioBufferConverter(const AudioParameters& output_params); |
28 ~AudioBufferConverter() override; | 28 ~AudioBufferConverter() override; |
29 | 29 |
30 void AddInput(const scoped_refptr<AudioBuffer>& buffer); | 30 void AddInput(const scoped_refptr<AudioBuffer>& buffer); |
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91 // Ratio of sample rates, in/out. | 91 // Ratio of sample rates, in/out. |
92 double io_sample_rate_ratio_; | 92 double io_sample_rate_ratio_; |
93 | 93 |
94 // Computes timestamps in terms of the output sample rate. | 94 // Computes timestamps in terms of the output sample rate. |
95 AudioTimestampHelper timestamp_helper_; | 95 AudioTimestampHelper timestamp_helper_; |
96 | 96 |
97 // Are we flushing everything, without regard for providing AudioConverter | 97 // Are we flushing everything, without regard for providing AudioConverter |
98 // full AudioBuses in ProvideInput()? | 98 // full AudioBuses in ProvideInput()? |
99 bool is_flushing_; | 99 bool is_flushing_; |
100 | 100 |
| 101 // Pool to avoid thrashing memory when allocating AudioBuffers. |
| 102 scoped_refptr<AudioBufferMemoryPool> pool_; |
| 103 |
101 // The AudioConverter which does the real work here. | 104 // The AudioConverter which does the real work here. |
102 std::unique_ptr<AudioConverter> audio_converter_; | 105 std::unique_ptr<AudioConverter> audio_converter_; |
103 }; | 106 }; |
104 | 107 |
105 } // namespace media | 108 } // namespace media |
106 | 109 |
107 #endif // MEDIA_BASE_AUDIO_BUFFER_CONVERTER_H_ | 110 #endif // MEDIA_BASE_AUDIO_BUFFER_CONVERTER_H_ |
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